| Entries |
| Document | Title | Date |
|---|
| 20080197787 | Sinusoidal discharge for EL lamp - A driver for powering an EL lamp includes a boost circuit for converting low voltage DC to high voltage DC and an inverter for converting direct current to alternating current. The driver also includes at least one transistor for discharging,the EL lamp and a generator for producing a ramp voltage that is coupled to the base of the transistor. The ramp voltage causes the discharge current through the EL lamp to be sinusoidal, without harmonics. The discharge current does not cause the EL lamp to produce sound. | 08-21-2008 |
| 20080203936 | LED DRIVE CIRCUIT AND LED LIGHT-EMITTING DEVICE - A driver circuit | 08-28-2008 |
| 20080224628 | APPARATUS AND METHOD FOR DRIVING A LIGHT SOURCE, AND DISPLAY APPARATUS USING THE SAME - An apparatus and a method for driving a light source are provided. The apparatus includes a power converting unit which converts a direct current (DC) power into an alternating current (AC) power for driving the light source, and a control unit which controls the power converting unit to convert the DC power into the AC power according to a pulsewave. | 09-18-2008 |
| 20080246410 | Lighting Device and a Lighting Method for a High Pressure Discharge Lamp - Even in a high pressure discharge lamp causing temperature difference between electrodes when an AC current is supplied, the temperature difference is eliminated to suppress the arc movement, thereby suppressing flickering caused thereby during stable lighting. | 10-09-2008 |
| 20080258641 | Power Supply For Semiconductor Light Emitting Device And Illuminating Device - The present invention provides a power supply for a semiconductor light emitting device capable of efficiently modulating and driving a current-driven semiconductor light emitting device. An LED | 10-23-2008 |
| 20080258642 | Lamp base with electrical device recharging receptacle and method - A lamp base having an electrical device recharging receptacle configured to receive a plug from a recharging device for a portable rechargeable electronic device. The receptacle is configured as a standard automobile cigarette lighter receptacle. The receptacle includes standard cigarette lighter receptacle electrical contacts that are connected to a voltage and current conversion circuit for receiving standard household voltage and converting it into standard automotive voltage and current. | 10-23-2008 |
| 20080258643 | Method for driving alternate current of light emitting diode and operating voltage thereof - A method for driving AC of light emitting diodes includes an AC obtaining measure for obtaining an AC sine wave signal having positive and negative half-cycle waveforms; a power modulation measure for modulating the AC sine wave signal and an impedance of first and second LED groups according to at least two opposite conducting directions connected in parallel to change the positive half-cycle waveform to comply with an operation range of the positive half-cycle driving signal of the first LED group and modulate the negative half-cycle waveform to comply with an operation range of the negative half-cycle driving signal of the second LED group; and a power driving measure for driving the first and second LED groups by the positive and negative half-cycle driving signals, and the first and second LED groups are driven sequentially according to the operating cycles of the positive and negative half-cycle driving signals respectively. | 10-23-2008 |
| 20080258644 | Load Control Device Having A Modular Assembly - A load control device has a modular assembly to allow for easy adjustment of the aesthetic and the color of the load control device after installation. The load control device comprises a user interface module and a base module. The user interface module includes an actuation member for receiving a user input and a visual display for providing feedback to the user. The base module has a controllably conductive device and a controller for controlling the amount of power delivered from an AC power source to an electrical load. A connector of the base module is adapted to be coupled to a connector of the user interface module, such that the controller is operatively coupled to the actuation member and the visual display. | 10-23-2008 |
| 20080278091 | Method and Circuit for Driving Back a Light Emitter of a Display Apparatus - A back light emitter ( | 11-13-2008 |
| 20090009100 | Reactive Circuit and Rectifier Circuit - The invention relates to a reactive circuit for correction of a power factor in an electrical network. The reactive circuit has at least one supply connection for supplying an alternating power supply ( | 01-08-2009 |
| 20090015172 | LIGHT SOURCE APPARATUS AND DRIVING APPARATUS THEREOF - A light source driving apparatus to drive at least one light source module includes a switch unit for coupling in series with an AC power source and the light source module; a clock synchronization unit for coupling to the AC power source and to provide a clock synchronization signal in accordance with an AC voltage of the AC power source; a control unit coupled to receive the clock synchronization signal and to provide to the switch unit an adjusting signal according to a timing of the clock synchronization signal; and a feedback unit coupled to the control unit and to detect a load state of the light source module, the feedback unit configured to provide to the control unit a feedback signal having a value representative of the detected load state of the light source module. The control unit is configured to modulate a pulse width of the adjusting signal according to the feedback signal and a preset brightness value of the light source module, the switch unit responsive to the adjusting signal to open and close to apply the AC voltage to the light source module in accordance with the modulated pulse width. | 01-15-2009 |
| 20090026975 | SYSTEMS AND METHODS FOR IMPROVED STARTUP AND CONTROL OF ELECTRODELESS PLASMA LAMP USING CURRENT FEEDBACK - In one example embodiment, a drive probe is coupled to the lamp body to provide the primary power for ignition and steady state operation of the lamp. Feedback may be used to adjust frequency in response to changing conditions of the lamp during startup. A phase shifter may be used to adjust the phase of the power between ignition and steady state operation. A sensor may detect a lamp operating condition that automatically triggers a shift in phase after the fill in the bulb is vaporized. In another example embodiment, a method for sequentially optimizing the drive power and phase shift applied to the lamp is disclosed that may reliably regulate the lamp current consumption to desired startup and operational levels despite variations in lamp environmental conditions. | 01-29-2009 |
| 20090033239 | LIGHTING CONVERSION SYSTEM - An adapter for a T12 fluorescent light fixture that is used to convert the fixture into a T5 or T8 fixture. The adapter includes a male input for receiving power supplied by the T12 ballast. The adapter has circuitry that adjusts the power supplied by the T12 ballast to parameters usable by a T5 or T8 fluorescent lamp. Also, the adapter includes a female output for outputting the usable power from the circuitry. The usable power drives the T5 or T8 fluorescent lamp. | 02-05-2009 |
| 20090039797 | Process and system of power saving lighting - A process and system of lighting with green energy source and intelligent power management, which saves energy consuming and limits pollution. The system is using solar power, green battery, and LED which are clean, long life; save, and energy saving. A microcontroller coordinates devices and sensors to optimize the operation of the system to generate illumination. The process includes the steps of sensing the environment, selecting power source, determining the energy output and driving the light device in order to most efficiently using energy and generate sufficient light for different purposes. | 02-12-2009 |
| 20090051297 | Frequency modulation method and device for high intensity discharge lamp - An electronic control gear for a HID lamp receives an input signal for operating the lamp and frequency modulates the input signal to generate a frequency modulated output signal that drives an arc of the lamp. The frequency modulation of the output signal sweeps continuously between a low frequency modulation and a high frequency modulation, the low frequency modulation being a frequency f | 02-26-2009 |
| 20090072753 | FLUORESCENT TUBE, A METHOD OF DRIVING THE FLUORESCENT TUBE, AN ILLUMINATING DEVICE FOR DISPLAY DEVICE, AND A DISPLAY DEVICE HAVING THE ILLUMINATING DEVICE - A fluorescent tube in which no luminance gradient in the longitudinal direction occurs even when a one-side high-voltage driving method is used, a method of driving the fluorescent tube, an illuminating device for display device, and a display device having the illuminating device are provided. The fluorescent tube for one-side high-voltage driving is arranged behind a display panel via optical sheets. An internal diameter of the fluorescent tube is arranged to become larger gradually toward an electrode part at a high-voltage driving side, which prevents the occurrence of the luminance gradient in the longitudinal direction when a one-side high-voltage driving method is used. | 03-19-2009 |
| 20090079355 | Digital Driver Apparatus, Method and System for Solid State Lighting - An apparatus, method and system are provided for controlling the solid state lighting, such as LEDs. An exemplary apparatus comprises: a switch for switching electrical current through the LEDs, a current sensor; a first comparator adapted to determine when a switch electrical current has reached a first predetermined threshold; a second comparator adapted to determine when the switch electrical current has reached a predetermined average current level; and a controller. The controller is adapted to turn the switch into an on state and an off state, to determine a first on time period as a duration between either a detection of a second predetermined current threshold or the turning the switch into the on state, and the detection of the predetermined average current level; to determine a second on time period as a duration between the detection of the predetermined average current level and the detection of the first predetermined current threshold; and to determine an on time period of the switch as substantially proportional to a sum of the first on time period and the second on time period. Additional exemplary embodiments utilize a difference between the first and second on time periods to generate an error signal to adjust the on time period of the switch. | 03-26-2009 |
| 20090115341 | LAMP DRIVING CIRCUIT - In a lamp driving circuit for operating a high intensity discharge lamp, an a commutation circuit comprises at least two switching devices. The switching devices are alternately switched active at a commutation frequency. The active switching device switches at a switching frequency. During an ignition mode, the switching frequency and the commutation frequency are substantially equal. A resulting commutation voltage is supplied to an inverter resonant circuit for generating a supply current. At a node of the inverter resonant circuit, a clamping circuit limits the generated voltage to a predetermined maximum voltage. The voltage at said node of the inverter resonant circuit is applied to an output resonant circuit. The output resonant circuit operates in the ignition mode as a resonator for generating a high ignition voltage; in a steady state operation mode, the output resonant circuit operates as a low-pass filter for reducing a high frequency current component in a lamp current. | 05-07-2009 |
| 20090121646 | Electrodeless Discharge Lamp Illuminator - An electrodeless discharge lamp lighting fixture which can secure lightness even in the case of a dimmering control at a low temperature. The electrodeless discharge lamp lighting fixture according to the present invention comprises an electrodeless discharge lamp | 05-14-2009 |
| 20090160349 | Electronic stabilizer circuit for suppressing startup instabilities in cold cathode fluorescent lamps - According to the present invention an electronic stabilizer circuit for suppressing startup instabilities when supplying a cold cathode fluorescent lamp with current is proposed which is connected in series with a power supply line of the cold cathode fluorescent lamp. The stabilizer circuit has variable impedance which is automatically adjusted depending on the magnitude of the lamp current thus limiting the lamp current to a certain current threshold. | 06-25-2009 |
| 20090184652 | Antenna for a Load Control Device Having a Modular Assembly - A load control device has a modular assembly to allow for easy adjustment of the aesthetic, the color, and the functionality of the load control device after installation. The load control device comprises a user interface module and a base module. The user interface module includes an actuation member for receiving a user input, a visual display for providing feedback to the user, and an antenna for transmitting and receiving radio-frequency signals. The base module has a controllably conductive device and a controller for controlling the amount of power delivered from an AC power source to an electrical load. A connector of the base module is adapted to be coupled to a connector of the user interface module, such that the controller is operatively coupled to the actuation member, the visual display, and the antenna. | 07-23-2009 |
| 20090200954 | COLOR CONTROL OF A DISCHARGE LAMP DURING DIMMING - A ballast circuit is suitable for driving a high intensity discharge lamp in at least two power modes including a nominal power mode for driving the high intensity discharge lamp at a nominal power and a reduced power dimming mode for driving the lamp at less than the nominal power. The lamp ballast circuit generates a first alternating current waveform during the nominal power mode and generates a background alternating current waveform in the reduced power mode which is perturbed at intervals by a high intensity pulse which helps to reduce the change in correlated color temperature which would otherwise occur in the dimming mode. | 08-13-2009 |
| 20090200955 | COMBINED BALLAST FOR FLUORESCENT LAMP AND LIGHT EMITTING DIODE AND METHOD OF DRIVING SAME - A circuit or combined ballast for driving a fluorescent lamp and at least one light emitting diode (LED) includes an integrated driver circuit having an alternating current (AC) circuit that includes at least one ballast coil for driving the fluorescent lamp and a direct current circuit for driving the LED having a secondary winding inductively coupled with the fluorescent lamp ballast coil for driving the LED. A method of driving a lamp assembly includes at least one fluorescent lamp and at least one light emitting diode (LED) and a combined driver circuit for supplying both the fluorescent lamp and the LED. The combined driver circuit supplies high voltage AC supply to a first portion of the driver circuit to the fluorescent lamp, supplies low voltage DC supply in a second portion of the driver circuit to the LED, and provides a secondary winding in the second portion of the driver circuit that is inductively coupled with a ballast coil in the first portion of the driver circuit that drives the fluorescent lamp. | 08-13-2009 |
| 20090206765 | Electronic ballast with phase dimmer detection - The invention relates to an electronic ballast comprising a converter which is used to operate a discharge lamp, for example, a low pressure discharge lamp, for selectively operating, in a direct manner, the supply network or a phase section dimmer. Jumps in the supply voltage are decoupled by a differential which is connected between at least one of the network lines and the reference potential of the ballast and transmitted to a control of the ballast, such that the control of the converter can distinguish between the operation on the phase section dimmer and on the network supply. | 08-20-2009 |
| 20090206766 | HIGH-PRESSURE DISCHARGE LAMP, LIGHTING APPARATUS AND HIGH-PRESSURE DISCHARGE LAMP APPARATUS - A high-pressure discharge lamp is characterized by including a translucent airtight container having a discharging space in an internal portion, electrodes for causing discharge in the discharging space of the translucent airtight container, and an ionization medium sealed in the translucent airtight container and containing a metal halide and rare gas, the metal halide including at least one type of halides of thulium and holmium whose sealing ratio with respect to the total amount of sealed metal halides is not lower than 30 mass % and the rare gas is xenon at not lower than 3 atm at 25° C., and the high-pressure discharge lamp is characterized in that mercury and a metal halide for formation of lamp voltage are not substantially contained in the translucent airtight container. | 08-20-2009 |
| 20090243502 | DISPLAY DEVICE - A light-emitting device is provide, which includes a first substrate, a first electrode and a second electrode, which are disposed above the first substrate and insulated from each other, enabling a difference in electrical potential to be given between the first electrode and the second electrode, a second substrate disposed to face the first substrate and spaced apart from the first substrate, a light-emitting layer disposed between the first substrate and the second substrate, the light-emitting layer includes a light-emitting material which emits light through an electrochemical oxidation or reduction thereof and chloride ions, and a barrier electrode interposed between the first electrode and the second electrode to partition the light-emitting layer. This barrier electrode is used as a standard for the electrical potential. | 10-01-2009 |
| 20090243503 | DISCHARGE LAMP LIGHTING DEVICE - A discharge lamp lighting device includes: a first series circuit unit in which a primary coil is connected in series to a capacitor; a second series circuit unit in which a secondary coil is connected in series to a discharge lamp, the secondary coil being a winding wound on the side portion of a rod-shaped magnetic core along the axial direction of the magnetic core, being greater in the number of turns than the primary coil, being smaller in dimension of its cross section parallel to the axial direction of the magnetic core than in dimension of its cross section in the radial direction of the magnetic core and forming a transformer along with the primary coil; and a bridge DC-AC converting circuit which includes four transistors, converts DC voltage supplied from a power supply unit to AC voltage and supplies the AC voltage to both ends of the first and the second series circuit units connected in parallel to each other, and the discharge lamp lighting device being capable of generating voltage by a small and simple circuit at the time of starting the lamp and performing preheating control. | 10-01-2009 |
| 20090251060 | ELECTRONIC BALLAST SYSTEM WITH LAMP INTERFACE NETWORK - An electronic ballast is provided, which includes first and second output nodes, first and second lamp outputs, and a lamp interface network. The lamp interface network includes an LC circuit coupled between at least one of the first and second output nodes and a respective one of the first and second lamp outputs. | 10-08-2009 |
| 20090256489 | Fluorescent light control - Circuitry, which is compatible with incandescent light dimmers, is disposed within the screwbase of a compact fluorescent light, and sets driving frequencies for a mercury plasma, based, at least in part, on sensing the duty cycle of the incoming AC supply waveform. In this way, existing lighting infrastructure, including phase-cut dimmer circuits for incandescent light bulbs, may be preserved, and incandescent bulbs can be replaced with compact fluorescent lights equipped with circuitry in accordance with the present invention. In a further aspect, the circuitry synchronizes the bulb drive signals with the AC power line frequency. | 10-15-2009 |
| 20090267529 | Circuit Arrangement and Method for the Operation of a High-Pressure Gas Discharge Lamp - Disclosed is a circuit arrangement for supplying a lamp wattage to a high-pressure gas discharge lamp (Lp) in the form of an alternating current having an operating frequency, said operating frequency being frequency-modulated within large limits. The time characteristic of the operating frequency is selected such that more power is supplied to the lamp at greater frequencies, thus reducing the risk of exciting acoustic resonance in the lamp. Amplitude modulation through the frequency response of an interface (L | 10-29-2009 |
| 20090273293 | Light-emitting Diodes With Carrier Extraction Electrodes - One embodiment of the present invention relates to a light-emitting diode having one or more light-emitting layers, a pair of electrodes disposed on the light-emitting diode so that an operating voltage can be applied to generate light from the one or more light-emitting layers, and at least one external electrode in electronic communication with the one or more light-emitting layers. Applying an appropriate voltage to the at least one external electrodes at about the time the operating voltage is terminated extracts excess electrons from the one or more light-emitting layers and reduces the duration of electron-hole recombination during the time period over which the operating voltage is turned off. | 11-05-2009 |
| 20090273294 | FLAT DISCHARGE LAMP AND PRODUCTION METHOD THEREOF - The present invention provides a flat discharge lamp and the production method thereof. The flat discharge lamp comprises an upper substrate, a lower substrate and a discharge chamber disposed between the upper substrate and the lower substrate, wherein the discharge chamber is filled with an inert gas, and a plurality of first electrodes and second electrodes are arranged with one another disposed on the discharge chamber. Besides, each of the first electrodes and second electrodes is connected with one end and another end of an alternating power supply, respectively. The invention is characterized in that the discharge chamber is provided with fluorescent film coated on its interior surface and a plurality of third electrodes each disposed between the first electrode and the second electrode. Besides, all the third electrodes are connected to a common plane, or each of which is connected to the common plane, respectively. The third electrode is controllable to change the discharge energy and path when dielectrically impeded discharge is carried out between the first electrode and the second electrode. | 11-05-2009 |
| 20090273295 | STRIKING AND OPEN LAMP REGULATION FOR CCFL CONTROLLER - An apparatus and method for igniting a lamp during a strike mode of an inverter comprising: sequentially controlling a duty cycle sweep and a frequency sweep of driving signals in the inverter to provide an increasing output voltage to the lamp. One embodiment advantageously includes a closed feedback loop to implement the duty cycle sweep and the frequency sweep such that an open lamp voltage is reliably regulated during the strike mode. For example, the closed feedback loop stops the duty cycle sweep or the frequency sweep when the output voltage to the lamp reaches a predetermined threshold and makes adjustments to the duty cycle or frequency the driving signals as needed to keep the output voltage at approximately the predetermined threshold if the lamp has not ignited. | 11-05-2009 |
| 20090273296 | MULTIPLE-INPUT ELECTRONIC BALLAST WITH PROCESSOR - A ballast having a microprocessor embedded therein is controlled via four inputs. The ballast includes a high-voltage phase-controlled signal provided by a dimmer and an infrared (IR) receiver through which the ballast can receive data signals from an IR transmitter. The ballast can also receive commands from other ballasts or a master control on the serial digital communication link, such as a DALI protocol link. The fourth input is an analog signal, which is simply a DC signal that linearly ranges in value from a predetermined lower limit to a predetermined upper limit, corresponding to the 0% to 100% dimming range of the load. The output stage of the ballast includes one or more FETs, which are used to control the current flow to the lamp. Based on these inputs, the microprocessor makes a decision on the intensity levels of the load and directly drives the FETs in the output stage. | 11-05-2009 |
| 20090278467 | DIMMABLE ELECTRONIC BALLAST FOR ELECTRODELESS DISCHARGE LAMP AND LUMINAIRE - A dimmable electronic ballast for an electrodeless discharge lamp comprises an inverter circuit, a resonance circuit, an induction coil and a start circuit. The start circuit has a variable time constant. The start circuit sweeps a drive frequency of the inverter circuit through a time constant for start or restart so that the voltage applied across the coil is raised from voltage lower than start voltage and restart voltage for starting and restarting the lamp to voltage higher than the start voltage and the restart voltage. The time constant for start during a start period for starting the lamp is larger than the time constant for restart during a restart period for restarting the lamp. | 11-12-2009 |
| 20090289568 | Circuit Arrangement and Method for Operating a Discharge Lamp - A circuit arrangement for operating a discharge lamp including an inverter, which at its output provides a signal with a preselectable frequency; at least one lamp inductance between the output of the inverter and the discharge lamp; at least one capacitor and, coupled to the lamp inductance, an actuating device for actuating the inverter with the signal; a control device for controlling a control parameter which is dependent on the lamp current, wherein the control device has a first time constant; wherein the discharge lamp has a second smaller time constant; the circuit arrangement has at least one area with a first and a second stable operating point and between these an unstable region of operation, and the actuating device varies the preselectable frequency during the operation of the discharge lamp in such a way that the circuit arrangement is operated in the unstable region of operation. | 11-26-2009 |
| 20090289569 | CCFL CONTROLLER WITH MULTI-FUNCTION TERMINAL - A cold cathode fluorescent lamp controller exhibiting a multi-function terminal and operative alternately in a strike mode and a run mode, the controller comprising: a phase locked loop arranged for synchronization of an oscillator, associated with the controller, with an external signal, the phase locked loop comprising a capacitor coupled to the multi-function terminal; and a soft start circuit arranged to limit drive current immediately after reset of the controller responsive to a signal at the multi-function terminal. In one embodiment the controller further comprises an error detection circuit arranged to output an error signal on the multi-function terminal. In one embodiment the controller further comprises a frequency sweeping circuit operative to sweep the frequency of a drive signal during the strike mode of the controller, the frequency of the drive signal being swept by the frequency sweeping circuit responsive to a signal at the multi-function terminal. | 11-26-2009 |
| 20090295303 | BRIGHTNESS CONTROL OF FLUORESCENT LAMPS - A method of controlling the brightness of a fluorescent lamp from a low frequency alternating current mains supply is described in which the lamp has an associated ballast providing a higher frequency power supply. The ballast includes a microprocessor which controls the frequency of the power supplied to the lamp by the ballast. This frequency is varied in accordance with the desires of the operator by actuating a cycle of variation of the frequency supplied to the lamp and ending the cycle when the desired brightness is reached. The cycle of variation of the frequency may be initiated by operation of a control switch located in series with the mains supply such as an on/off switch; the cycle of variation of the frequency is initiated by momentary operation of the control switch. In an alternative embodiment the control switch is a dimmer switch which suppresses part of each cycle of the mains supply and the variation of the frequency is initiated by the control switch. In a further embodiment the cycle of variation of the frequency is initiated by an external radiated signal received by the microprocessor, such as an infrared signal directed to an IR sensor located in the ballast or a radio frequency signal directed to a radio-receiver incorporated in the ballast. The fluorescent tube may be detachably fitted to a ballast unit which forms part of the lamp base. There is also provided a fluorescent lamp ballast for use in the described method comprising a microprocessor which controls the frequency of the power supplied to the lamp by the ballast and which is varied in accordance with the desires of the operator by actuating a cycle of variation of the frequency supplied to the lamp and ending the cycle when the desired brightness is reached. | 12-03-2009 |
| 20090302776 | ELECTRONIC CIRCUIT FOR DRIVING A DIODE LOAD WITH A PREDETERMINED AVERAGE CURRENT - Electronic circuits and methods include provisions for passing a first current through a diode during a first time interval and for passing a second different current through the diode during a second different time interval. The first current is selected to achieve a predetermined voltage at a node of the diode. A duty cycle of the first current relative to the second current is selected to achieve a predetermined average current passing through the diode. In some arrangements, the diode is a light emitting diode. | 12-10-2009 |
| 20100013400 | Circuit Arrangement and Method for Operating a High-Pressure Discharge Lamp - A circuit arrangement for operating a high-pressure discharge lamp ( | 01-21-2010 |
| 20100013401 | Circuit Arrangement and Method for Starting and Operating One or More Discharge Lamps - A circuit arrangement for starting and operating one or more discharge lamps comprising a self-oscillating inverter ( | 01-21-2010 |
| 20100026198 | LIGHT EMITTING DEVICE AND METHOD FOR MANUFACTURING THE SAME - The light emitting device of the invention includes a first electrode, a second electrode, and a carrier formed between the first electrode and the second electrode and containing germanium light emitters, wherein the germanium light emitters contain germanium oxide in which at least part of the germanium oxide has oxygen deficiency and have a wavelength peak of emission in both or either the range of 250 to 350 nm and/or the range of 350 to 500 nm when a potential difference is applied to the first electrode and the second electrode. | 02-04-2010 |
| 20100026199 | DIELECTRIC BARRIER DISCHARGE LAMP WITH STARTING AID - A dielectric barrier discharge lamp is provided, which may include an anode and a cathode, a discharge vessel with an exhaust tube, at least one starting electrode which is arranged along the outer side of the exhaust tube, a starting coating, which is arranged in the inner side of the exhaust tube, wherein the starting coating is arranged centrally over the starting electrode, and this starting electrode is connected to the cathode. | 02-04-2010 |
| 20100033102 | Light Adjusting Device for a Light Emitting Diode and Related Light Adjusting Method and Light Emitting Device - A light adjusting device for a light emitting diode includes a switch, a detecting unit and an illumination adjusting unit. The switch is coupled to a power terminal, which is utilized for providing power for the light emitting diode. The detecting unit is coupled to the switch, and is utilized for determining a status of the switch, so as to generate a detecting result. The illumination adjusting unit is coupled to the detecting unit, and is utilized for adjusting illumination of the light emitting diode according to the detecting result. | 02-11-2010 |
| 20100033103 | DRIVING DEVICE AND DRIVING METHOD FOR DISCHARGE LAMP, LIGHT SOURCE DEVICE, AND IMAGE DISPLAY APPARATUS - A driving device for a discharge lamp includes: a discharge-lamp lighting unit that supplies an alternating current to the discharge lamp to thereby supply electric power to between two electrodes of the discharge lamp; an inter-electrode-voltage detecting unit that detects an inter-electrode voltage applied when predetermined electric power is supplied to between the two electrodes; and a power-supply-condition switching unit that switches, on the basis of the detected inter-electrode voltage, the power supply by the discharge-lamp lighting unit with a predetermined hysteresis given to the switching of the power supply conditions, wherein the power supply conditions are switched by changing at least one of a frequency of the alternating current, a duty ratio of the alternating current, a modulation pattern of the frequency, and a modulation pattern of the duty ratio. | 02-11-2010 |
| 20100039039 | High pressure discharge lamp lighting device and luminaire - A high pressure discharge lamp lighting device, includes: a DC/DC converter for converting a power source voltage of a DC power source into a desired DC voltage and stably lighting a high pressure discharge lamp; a DC/AC inverter for inverting the DC voltage into an AC voltage; and a starting pulse generating circuit for generating a high voltage required for the start-up of the high pressure discharge lamp. Further, the high pressure discharge lamp lighting device includes a lighting state decision unit for deciding a lighted/unlighted state of the high pressure discharge lamp; and an operating state switching control unit for switching the operating state of at least one of the DC/DC converter, the DC/AC inverter, and the starting pulse generating circuit to another operating state, depending on a predetermined operation phase out of the start-up, stable lighting and power interrupt phases of the high pressure discharge lamp. | 02-18-2010 |
| 20100039040 | Driving Method for High Efficiency Mercury-Free Flat Light Source Structure, and Flat Light Source Apparatus - Disclosed are a new Mercury-free flat light source structure capable of enhancing and adjusting brightness, maintaining stable and uniform discharge, and improving luminous efficiency, and a large flat light source apparatus using the same Mercury-free flat light source structure as a unit cell capable of adjusting the brightness and causing local discharges in selected areas, and a driving method thereof. | 02-18-2010 |
| 20100045197 | GAS-DISCHARGE LAMP - A gas-discharge lamp ( | 02-25-2010 |
| 20100045198 | LED LIGHT ENGINE - An integrated Light Emitting Diode (LED) device including multiple LEDs connected to a circuit board, integrated circuit (IC) drivers connected to the circuit board, and a first alternating current (AC) terminal and a second AC terminal connected to the circuit board. | 02-25-2010 |
| 20100052557 | LAMP DRIVER CIRCUIT AND METHOD FOR DRIVING A DISCHARGE LAMP - A lamp driver circuit ( | 03-04-2010 |
| 20100060183 | Metal Halide Discharge Lamp and Metal Halide Discharge Lamp System - [Problems] To provide a metal halide discharge lamp essentially not having mercury that is lighted stably so that a discharge arc is corrected into the straight state against the gravity induced convection using an acoustic resonance phenomenon, and a metal halide discharge lamp system for lighting the same. | 03-11-2010 |
| 20100060184 | METHOD AND SYSTEM FOR OPERATING A GAS DISCHARGE LAMP - In an application of a gas discharge lamp (La) arranged at a relatively large distance from its driving lamp driver circuit, parasitic capacitances (C | 03-11-2010 |
| 20100066260 | HYBRID LIGHT SOURCE - A hybrid light source comprises a discrete-spectrum lamp (for example, a fluorescent lamp) and a continuous-spectrum lamp (for example, a halogen lamp). A control circuit individually controls the amount of power delivered to the discrete-spectrum lamp and the continuous-spectrum lamp in response to a phase-controlled voltage generated by a connected dimmer switch, such that a total light output of the hybrid light source ranges throughout a dimming range. The discrete-spectrum lamp is turned off and the continuous-spectrum lamp produces all of the total light intensity of the hybrid light source when the total light intensity is below a transition intensity. The continuous-spectrum lamp is driven by a continuous-spectrum lamp drive circuit, which is operable to conduct a charging current of a power supply of the dimmer switch and to provide a path for enough current to flow through the hybrid light source, such that the magnitude of the current exceeds rated latching and holding currents of a thyristor of the dimmer. | 03-18-2010 |
| 20100066261 | DC/AC CONVERTER AND CONTROLLER THEREOF - A DC/AC converter includes a resonant circuit having a first capacitor connected to at least one of a primary winding and a secondary winding of a transformer and an output end connected to a load, the resonant circuit receiving an alternating signal having a predetermined frequency and amplitude to pass a current, a variable impedance element connected in parallel with a part of the output end of the resonant circuit, the variable impedance element changing the impedance value thereof according to a current passing through the load, and a controller to control the current passing through the load to a predetermined value by changing the resonant frequency of the resonant circuit according to the changed impedance value of the variable impedance element. | 03-18-2010 |
| 20100072908 | DISCHARGE LAMP LIGHTING DEVICE - There has conventionally been provided a discharge lighting device capable of performing dimming control of a hot cathode type discharge lamp. As a tube current is decreased, a filament temperature is decreased, and as the tube current is further decreased, discharge cannot be maintained, which in turn causes moving striations and flickering. The conventional device requires power supplies for controlling the tube current of the hot cathode type discharge lamp and for controlling a filament current, and has therefore a problem that a circuit becomes complicated, and the number of parts is increased, resulting in an increase in cost. | 03-25-2010 |
| 20100072909 | System for Field-Programmed Determination of Illumination Set Points in Ballasts - A system for programming control of ballast illumination includes receiving a power stage input current through a first ballast input, receiving a level switch control signal at a second ballast input, entering a ballast illumination program mode, adjusting said level switch control signal to select a ballast lamp illumination and saving a field-programmed ballast lamp illumination indication in a ballast memory as representative of said ballast lamp illumination. | 03-25-2010 |
| 20100072910 | External resonator/cavity electrode-less plasma lamp and method of exciting with radio-frequency energy - Described is a plasma electrode-less lamp. The device comprises an electromagnetic resonator and an electromagnetic radiation source conductively connected with the electromagnetic resonator. The device further comprises a pair of field probes, the field probes conductively connected with the electromagnetic resonator. A gas-fill vessel is formed from a closed, transparent body, forming a cavity. The gas-fill vessel is not contiguous with (detached from) the electromagnetic resonator and is capacitively coupled with the field probes. The gas-fill vessel further contains a gas within the cavity, whereby the gas is induced to emit light when electromagnetic radiation from the electromagnetic radiation source resonates inside the electromagnetic resonator, the electromagnetic resonator capacitively coupling the electromagnetic radiation to the gas, which becomes a plasma and emits light. | 03-25-2010 |
| 20100084988 | DISCHARGE LAMP LIGHTING DEVICE, LIGHTING FIXTURE, AND LIGHTING SYSTEM - A discharge lamp lighting device includes: a direct current power supply circuit that outputs direct current power; an inverter circuit that converts the direct current power, which is outputted by the direct current power supply circuit, into alternating current power, and supplies the alternating current power to a discharge lamp; a control circuit that controls a frequency of an output of the inverter circuit (operation frequency); and a starting detection circuit that detects beginning (starting) of a discharge in the discharge lamp. The control circuit operates in a starting improvement mode, in which the operation frequency is lowered than an operation frequency in a lighting mode, during a predetermined time from when the starting of the discharge lamp is detected by the starting detection circuit | 04-08-2010 |
| 20100084989 | Method for Initiating and Controlling a Lighting Equipment - The present invention primarily relates to a method for initiating and controlling a lighting equipment by detecting and determining through an algorithm whether a flicker of light may occur during the period of initiating or dimming the lighting equipment. The method further calculates to obtain a current compensation ratio that the current level need be elevated to prevent the occurrence of flicker and performs a real-time compensation for the electrical current, when necessary. The method according to the invention will initiate the lighting equipment at an electrical current level used during a previous stable operation of the lighting equipment, so as to further prevent the occurrence of flicker of light during the initiation of the lighting equipment and achieve the energy saving purpose. | 04-08-2010 |
| 20100090610 | Control Method, Control Device and Method for Producing the Control Device - A pulsed electric operating current that rises during a pulse duration is generated for operating at least one radiation-emitting semiconductor component. For this purpose, in a method for producing a control device for operating the at least one radiation-emitting semiconductor component, a temporal profile of a thermal impedance representative of the at least one radiation-emitting semiconductor component is determined. A profile of the electric operating current that is to be set is determined depending on the determined temporal profile of the thermal impedance. The control device is furthermore designed such that the profile of the operating current that is to be set is set in each case during the pulse duration. | 04-15-2010 |
| 20100097004 | System And Apparatus For Cathodoluminescent Lighting - Electron sources for a cathodoluminescent lighting system are disclosed. An electron source is a broad-beam reflecting-type electron gun having a cathode for emitting electrons and a reflector and/or secondary emitter electrode and no grids. An alternative electron gun has a cathode having a heater welded to a disk, the disk having an emissive surface on a side facing a dome-shaped defocusing grid and an anode. A lighting system incorporating the electron sources has an envelope with a transparent face, an anode with a phosphor layer to emit light through the face and a conductor layer. The system also has a power supply for providing from five to thirty thousand volts of power to the light emitting device to draw electrons from cathode to anode and excite a cathodoluminescent phosphor, and the electrons transiting from cathode to anode are essentially unfocused. A power-factor-corrected embodiment is also disclosed. | 04-22-2010 |
| 20100102741 | HIGH-VOLTAGE PULSE GENERATOR AND HIGH-PRESSURE DISCHARGE LAMP COMPRISING SUCH A GENERATOR - A compact high-voltage pulse generator based on a spiral pulse generator is provided, wherein the spiral pulse generator is in the form of an LTTC component part or HTCC component part including two ceramic films of a given width and a metallic conductor applied to each of said ceramic films, which conductors are wound together in spiral form, such that the edge of the films together forms an end face in the manner of a circular ring, the two conductors being electrically insulated from one another by at least one insulation means. | 04-29-2010 |
| 20100109544 | COLD CATHODE TUBE LAMP - A cold cathode tube lamp which can be lighted easily when the ambient temperature is low. The cold cathode tube lamp comprises discharge tubes ( | 05-06-2010 |
| 20100109545 | Automatic Compensation For Degradation Of Optocoupler Light Emitting Diode - A system and method for compensating for degradation of a light emitting diode includes accumulating time that the light emitting has been lit. An additional amount of drive current to be provided to the light emitting diode is determined based on the accumulated time that the light emitting diode has been lit. The system includes a controller that accumulates the time that the light emitting diode has been lit and determines the amount of addition drive current to be provided to the light emitting diode. | 05-06-2010 |
| 20100109546 | ELECTRONIC BALLAST WITH LAMP FLICKER SUPPRESSION DURING START-TO-STEADY STATE TRANSITION - An electronic ballast is provided for powering a discharge lamp and suppressing lamp flicker during startup transition. A power converter receives DC input power and converts it into an AC power output. A resonant circuit is coupled with the lamp and also between output terminals of the power converter. A controller controls the power converter with respect to particular modes of operation. The controller in a starting operation sets the output frequency of the power converter to a predetermined start frequency upon lamp startup to make the lamp begin discharging. The controller shifts from the starting operation to steady-state operation by setting the output frequency of the power converter at a predetermined steady-state frequency lower than the start frequency. The predetermined start frequency is set to a frequency identical or close to 1/(an odd whole number) of the resonant frequency of the resonant circuit with the lamp unlit, and also to a frequency identical or close to the resonant frequency of the resonant circuit with the discharge lamp lit. The start frequency is sufficient to make the discharge lamp start discharging, and to raise a temperature of each electrode of the discharge lamp after lamp startup and by an end of the starting operation. | 05-06-2010 |
| 20100117549 | PULSE-WIDTH MODULATION CONTROL FOR BACKLIGHTING OF A VIDEO DISPLAY - A pulse-width modulated backlight control for a video display restarts the pulse-width modulated pulse train on occurrence of a video refresh pulse. In order to prevent an undesirable momentary increase in brightness in the event that the last pulse of the pre-refresh pulse train occurs too close to the first pulse of the post-refresh pulse train relative to the normal pulse interval, the width of the first pulse following refresh may be reduced from a first value determined by the desired brightness to a second value that bears the same proportion to the first value that the interval between the beginning of the previous pulse and the occurrence of the refresh pulse bore to the normal pulse interval. In that way, the duty cycle during the shortened pulse interval is the same as during a normal pulse interval, avoiding or minimizing perceptible increase in backlight brightness. | 05-13-2010 |
| 20100123406 | DRIVING DEVICE FOR DISCHARGE LAMP, LIGHT SOURCE DEVICE, IMAGE DISPLAY APPARATUS, AND DRIVING METHOD FOR DISCHARGE LAMP - A driving device for a discharge lamp includes: an alternating current supply section adapted to supply two electrodes of the discharge lamp with an alternating current; a frequency modulation section adapted to modulate a frequency of the alternating current, which the alternating current supply section supplies, in accordance with a predetermined condition of the discharge lamp within a range between a predetermined upper limit frequency and a predetermined lower limit frequency; and a modulation condition setting section adapted to set a modulation condition of the frequency by the frequency modulation section, wherein the modulation condition setting section sets the modulation condition so that the lower limit frequency when the discharge lamp is in a first state is higher than the lower limit frequency when the discharge lamp is in a second state in which a flicker is harder to occur than in the first state. | 05-20-2010 |
| 20100127631 | High pressure discharge lamp lighting apparatus - A high pressure discharge lamp lighting apparatus includes a high pressure discharge lamp and a power supply apparatus, wherein in a steady state lighting operation, an alternating current of a steady state lighting frequency and alternating current of a low frequency are supplied by turns to the high pressure discharge lamp, and wherein in a small electric power lighting in which electric power to be applied is smaller than that of the steady state lighting, alternating current of a small electric power lighting frequency and direct current are supplied by turns to the high pressure discharge lamp. | 05-27-2010 |
| 20100134031 | DEVICE AND METHOD FOR PERIODIC DIODE ACTUATION - An energy efficient illumination device is provided in which energy consumption is reduced by using a pulse generating circuit which provides power to LEDs in short pulses, and in which the circuit has a lifespan which is comparable to that of an LED. The illumination device includes a pulse generator circuit employing only passive circuit components and which is used to generate a desired pulsed and positively DC biased output waveform. The pulse generator circuit receives alternating current power as an input, alters the power waveform, and supplies the power to LEDs for a very short time (0.2-15 ms) during each cycle of a 50-60 Hz input signal. This paradigm of pulsed light emission provides ambient lighting that is perceived by humans to be steady and continuous, and which also provides substantial energy savings since power is used in only a fraction of the power cycle. | 06-03-2010 |
| 20100134032 | Circuit Arrangement, and Method for the Operation of a High-Pressure Discharge Lamp - A circuit arrangement for operating a high-pressure discharge lamp with an electronic ballast, which is designed to provide an AC feed signal for the high-pressure discharge lamp, the frequency of the AC feed signal being at least 1 MHz, wherein the electronic ballast is adapted to modulate the amplitude of the AC feed signal. | 06-03-2010 |
| 20100134033 | DRIVING METHOD FOR DISCHARGE LAMP, DRIVING DEVICE FOR DISCHARGE LAMP, LIGHT SOURCE DEVICE, AND IMAGE DISPLAY APPARATUS - In at least one embodiment of the disclosure, a driving device for a discharge lamp includes an alternating current supply section and a frequency switching section. The alternating current supply section supplies two electrodes of the discharge lamp with an alternating current. The alternating current includes a plurality of modulation periods with each modulation period including a highest frequency term and a lowest frequency term. The frequency switching section varies a frequency of the alternating current non-monotonically between the highest frequency term and the lowest frequency term of the modulation period in response to a predetermined condition being satisfied. | 06-03-2010 |
| 20100134034 | HIGH-PRESSURE DISCHARGE LAMP LIGHTING DEVICE WITH ALTERNATING CURRENT FREQUENCY TIME PERIODS - The high-pressure discharge lamp lighting device of the invention includes a lighting circuit for supplying an alternating current to a high-pressure discharge lamp to cause lighting, the high-pressure discharge lamp having an arc tube in which a halogen material is enclosed and a pair of electrodes is disposed, and each electrode having a protuberance at a tip thereof. A frequency of the alternating current varies without dependency on operating data that varies as a lighting time of the high-pressure discharge lamp elapses. | 06-03-2010 |
| 20100141165 | METHOD FOR IGNITING AND STARTING HIGH-PRESSURE DISCHARGE LAMPS - A method for igniting and for starting high-pressure discharge lamps is provided. The method may include applying a takeover voltage to the lamp for a predetermined time of a burst; superimposing ignition pulses on the takeover voltage in such a way that the voltage of the ignition pulses and the takeover voltage are added up and an interruption being provided between two bursts; and changing the ignition pulses from burst to burst or within a burst from the positive half-cycle of the takeover voltage to the negative half-cycle of the takeover voltage, and vice versa. | 06-10-2010 |
| 20100148685 | INTEGRATED DIMMABLE COMPACT FLUORESCENCE LAMP AND CIRCUIT USED THEREIN - The present invention discloses an integrated dimmable compact fluorescence lamp and a circuit used therein. The circuit includes: a dimming module configured to adjust the brightness of the compact fluorescence lamp by controlling the frequency of a voltage to be output to a control module, wherein the dimming module includes the following: a control part configured to receive a first electrical signal from an input module and an electrical feedback signal from a lamp tube of the compact fluorescence lamp, generate an electrical reference signal which represents a part of the first electrical signal or the whole electrical signal, adjust the electrical reference signal as reaction to an external operation and output the electrical reference signal and the electrical feedback signal to a frequency adjustment part to control the frequency of a voltage output from the frequency adjustment part; and the frequency adjustment part configured to receive the first electrical signal from the input module, generate the frequency of the voltage to be output to the control module and adjust the frequency of the voltage as reaction to the electrical reference signal and the electrical feedback signal. | 06-17-2010 |
| 20100148686 | HIGH PRESSURE DISCHARGE LAMP LIGHTING APPARATUS - A discharge lamp lighting apparatus includes a discharge container, a pair of electrodes and a power supply apparatus. An alternating current of a frequency, which is lower than stationary frequency, is inserted periodically into the alternating current of stationary frequency. When a lighting current value of the discharge lamp is smaller than a predetermined lower limit, the frequency is set as predetermined minimum frequency. When the lighting current value of a discharge lamp is larger than a predetermined maximum value, the frequency is set as predetermined maximum frequency. When a lighting current value of the discharge lamp is between the lower limit and the maximum value, the frequency is set as a selected frequency corresponding to the lighting current value. The selected frequency increases according to an increase of frequency change as a lighting current value increases. | 06-17-2010 |
| 20100148687 | Lighting of discharge lamp by frequency control - A discharge lamp controlling apparatus includes a detector for detecting a discharge condition of a discharge lamp; a frequency changing unit for gradually changing a frequency of a voltage to be applied to the discharge lamp until the discharge condition reaches a predetermined lighting condition; and a voltage controller for controlling the voltage to be applied to the discharge lamp on the basis of the frequency changed by the frequency changing unit. | 06-17-2010 |
| 20100156309 | LED ILLUMINANT DRIVING CIRCUIT AND AUTOMATIC BRIGHTNESS COMPENSATION METHOD THEREOF - An LED illuminant driving circuit and an automatic brightness compensation method thereof are provided herein. The automatic brightness compensation method includes: providing a target value; detecting an operation period of a pulse of an output of the LED illuminant driving circuit, the pulse is adapted to an LED illuminant for making the light emitting; deciding a peak value according to the target value and the operation period; and setting a peak level of the pulse according to the peak value. The LED illuminant driving circuit and the automatic brightness compensation method thereof provides a stable average current/voltage to the LED illuminant and avoids brightness variations of the light emitting. | 06-24-2010 |
| 20100164392 | DISCHARGE LAMP LIGHTING APPARATUS - A discharge lamp lighting apparatus is inexpensive and is capable of generally relaxing an unevenness of brightness caused by a brightness gradient of a discharge lamp. The apparatus includes an inverter | 07-01-2010 |
| 20100171435 | Thermal Protection For Lamp Ballasts - The output current of a ballast is dynamically limited when an over-temperature condition is detected in the ballast according to one of (i) a step function or (ii) a combination of step and continuous functions, so as to reduce the temperature of the ballast while continuing to operate it. | 07-08-2010 |
| 20100181926 | HIGH-PRESSURE DISCHARGE LAMP SYSTEM AND PROJECTOR USING THE SAME - A high-pressure discharge lamp system has a high-pressure mercury lamp | 07-22-2010 |
| 20100188009 | Multi-Modal Load Control System Having Occupancy Sensing - A multi-modal load control system includes a sensor that operates as an occupancy sensor in a first mode of operation and operates as a vacancy sensor in a second mode of operation. The load control system comprises a load control circuit adapted to be coupled in series electrical connection between an AC power source and an electrical load for controlling the amount of power delivered to the load in response to sensor, which is operable to detect occupancy or vacancy conditions in a space in which the sensor is located. In the first mode of operation, the load control circuit turns the load on when the sensor detects the occupancy condition and turns the load off when the sensor detects the vacancy condition. In the second mode of operation, the load control circuit turns the load off when the sensor detects the vacancy condition and does not turn the load on when the sensor detects the occupancy condition. | 07-29-2010 |
| 20100188010 | LIGHT SOURCE DEVICE AND PROJECTOR - A light source device includes: a microwave power source which outputs a microwave; a light-emitting tube with an emission space where a light-emitting material, which emits light by input of the microwave, is filled; a first electrode which is provided at one side of the light-emitting tube and is electrically connected to the microwave power source; a second electrode which is provided at the other side of the light-emitting tube, the emission space being interposed between the first and second electrodes; and a reflecting plate which is electrically connected to the second electrode and which reflects the microwave such that an antinode of the amplitude of a standing wave of a high-frequency current is positioned in the emission space by making the microwave resonate. | 07-29-2010 |
| 20100194304 | MULTIPLE LOCATION DIMMING SYSTEM - A multiple location dimming system comprises a plurality of dimmers coupled between an AC power source and a lighting load. Each of the plurality of dimmers is operable to control the intensity of the lighting load and comprises a controllably conductive device, e.g., a triac. The triacs of the plurality of dimmers are coupled in parallel electrical connection. Only an active one of the dimmers is operable to conduct a load current to the lighting load at any given time. A passive dimmer is operable to monitor the voltage across its triac in order to determine when the active dimmer is firing its triac. Accordingly, the passive dimmer is operable to fire its triac before the active dimmer fires its triac in order to “take over” control of the lighting load from the active dimmer to become the next active dimmer. Further, the passive dimmer is operable to determine the amount of power being delivered to the load and display this information on one or more status indicators. | 08-05-2010 |
| 20100201280 | ELECTRICALLY ISOLATED VERTICAL LIGHT EMITTING DIODE STRUCTURE - A light emitting device is provided having high luminous output while maintaining high wall plug efficiency, wherein the high thermal and electrical conductivity paths of the device are separated during the semiconductor wafer and die level manufacturing step. The device includes an electrical conducting mirror layer, which reflects at least 60% of generated light incident on it, and an isolation layer having electrical insulating properties and thermal conducting properties. A first electrode, which is not in contact with the main semiconductor layers of the device, is located on the mirror layer. A light emitting module, system and projection system incorporating the light emitting device are also described, as is a method of manufacture of the device. | 08-12-2010 |
| 20100201281 | DISCHARGE LAMP LIGHTING DEVICE, METHOD OF DRIVING DISCHARGE LAMP, AND PROJECTOR - In at least one embodiment of the disclosure, a discharge lamp lighting device includes a discharge lamp driving unit that drives a discharge lamp by supplying an AC driving current to the discharge lamp. A memory unit is configured to store driving parameters for the AC driving current. A control unit is configured to control the discharge lamp driving unit based on the driving parameters stored in the memory unit. The driving parameters comprise a range of holding time values, each holding time value representing a time period in which the AC driving current is to be continuously maintained at a same polarity. Upon a predetermined time condition, the control unit selects one of the holding time values based on a predetermined probability and controls the discharge lamp driving unit based on the selected holding time value. | 08-12-2010 |
| 20100213860 | HIGH-PRESSURE LAMP AND ASSOCIATED OPERATING METHOD FOR RESONANT OPERATION OF HIGH-PRESSURE LAMPS IN THE LONGITUDINAL MODE AND ASSOCIATED SYSTEM - A high-pressure discharge lamp may include an elongated ceramic discharge vessel, wherein an electrode projects into the discharge vessel in each end area, wherein the electrode is attached to a bushing arranged in a capillary tube, wherein the internal diameter is reduced to at most 85% of the internal diameter of the elongated ceramic discharge vessel in the end area, such that an end surface remains at the end of the vessel, which has an internal diameter of at least 15% of the internal diameter, wherein a gap of most 20 μm remains between the bushing and the inner wall of the capillary, wherein the ratio between the areas which are formed by the internal diameter of the capillary and the diameter of the end surface is in the range from 0.06 to 0.12. | 08-26-2010 |
| 20100244717 | FIELD EMISSION DEVICE AND DRIVING METHOD THEREOF - Provided is a pulse drive-type field emission device. The pulse drive-type field emission device includes anode and cathode substrates that are spaced apart from and face each other, a cathode electrode formed on the cathode substrate, and a field emitter formed on the cathode electrode. The pulse drive-type field emission device further includes a metal mesh-type gate electrode having an opening through which electrons emitted from the field emitter pass and a power source which applies a compensated pulse wave power to the gate electrode or the cathode electrode to compensate for vibration of the gate electrode. Thus, noise from the metal mesh can be prevented without additional fabrication processes by modifying a waveform in pulse driving. | 09-30-2010 |
| 20100244718 | METHOD AND DRIVING UNIT FOR DRIVING A GAS-DISCHARGE LAMP - In this method an arc-length control value, indicating the current length of a discharge arc of the gas-discharge lamp ( | 09-30-2010 |
| 20100244719 | FREQUENCY SENSITIVE LIGHTING CONTROL DEVICE | 09-30-2010 |
| 20100244720 | HIGH PRESSURE DISCHARGE LAMP LIGHT SOURCE DEVICE - For maintaining the projections of the electrode tip ends in the ideal condition and maintaining a stable arc even if the lamp is lighted with a lamp power of at most 70% of the rated electric power, a high pressure discharge lamp light source device is provided, comprised of a high pressure discharge lamp having a discharge vessel made from quartz glass and a pair of electrodes arranged oppositely to each other with a spacing of at most 2.0 mm, each electrode having a projection formed at a tip end thereof, and mercury of at least 0.20 mg/mm | 09-30-2010 |
| 20100253236 | HIGH PRESSURE DISCHARGE LAMP LIGHT SOURCE DEVICE - In order to maintain a stable arc and avoid wear of the projections of electrode tip ends even if the lamp is lighted with a lamp power of at most 70% of the nominal electric power, a high pressure discharge lamp light source device is provided comprised of a high pressure discharge lamp having a discharge vessel made from quartz glass and a pair of electrodes arranged oppositely to each other with a spacing of at most 2.0 mm, each electrode having a projection formed at a tip end thereof, and mercury of at least 0.20 mg/mm | 10-07-2010 |
| 20100270939 | Method And Electronic Ballast for Operating a High Pressure Discharge Lamp - A method for operating a high pressure discharge lamp with the aid of a high frequency signal is disclosed. The high pressure discharge lamp comprises at least one first ( | 10-28-2010 |
| 20100289423 | ELECTRONIC BALLAST WITH STEP UP/DOWN POWER FACTOR CORRECTION DC-DC CONVERTER SUITABLE FOR HIGH INPUT VOLTAGE APPLICATIONS - Electronic ballasts and buck-boost DC-DC converters therefor are presented with a buck converter with two switching devices connected with two capacitances and two diodes to limit the individual switching device voltages to around half the converter DC input voltage or less. | 11-18-2010 |
| 20100295462 | ELECTRONIC BALLAST AND METHOD FOR CONTROLLING AT LEAST ONE LIGHT SOURCE - An electronic ballast for driving at least one light source may include an input for connecting a supply voltage; an output configured to connect the at least one light source; an oscillator, which is designed to provide an oscillator output signal with a first frequency at its output, the oscillator having a calibration input in order to alter the first frequency; and a microcontroller configured to provide a drive signal with at least one spectral component at a second frequency for the at least one light source, the microcontroller being coupled to the oscillator output and being designed to generate the second frequency as a function of the first frequency; wherein the electronic ballast furthermore includes a drive circuit, which is coupled to the calibration input, the drive circuit being designed to vary the first frequency during running operation of the electronic ballast via the calibration input. | 11-25-2010 |
| 20100320926 | Sine wave light modulation control method and device - A light modulation control method applied to control a lamp is disclosed. The control method includes the following steps: first, providing an AC voltage; then, rectifying the AC voltage into a first DC pulse; modulating the first DC pulse into a modulated wave; filtering the modulated wave into a second DC pulse; finally, alternatingly switching the second DC pulse to a modulated AC voltage for the lamp through a switching unit. | 12-23-2010 |
| 20110012523 | METHOD AND CURRENT CONTROL CIRCUIT FOR OPERATING AN ELECTRONIC GAS DISCHARGE LAMP - In a method for operating an electronic gas discharge lamp by a TRIAC circuit, a current is drawn from the dimmer circuit when the TRIAC is in a non-conductive state to bring the TRIAC in the conductive state and the current drawn from the dimmer circuit is reduced when the TRIAC is in a conductive state. According to the invention a substantially fixed current is drawn from the dimmer circuit in the conductive state of the TRIAC at a sufficient level to maintain the TRIAC in the conductive state. To this end a current control circuit for controlling a current drawn from a power source including a voltage controlled variable resistive switch circuit driven by a voltage control circuit. | 01-20-2011 |
| 20110012524 | DISCHARGE LAMP LIGHTING DEVICE, PROJECTOR, AND DRIVING METHOD OF DISCHARGE LAMP - In at least one embodiment of the disclosure, a discharge lamp lighting device comprises a discharge lamp driving section and a control unit. The control unit alternately performs a first DC driving processing and a first AC driving processing in a first portion of the driving current. The control unit alternately performs a second DC driving processing and a second AC driving processing in a second portion of the driving current different from the first portion. The control unit performs the first AC driving processing and the second AC driving processing such that a frequency of a first alternating current and a frequency of a second alternating current have different values. | 01-20-2011 |
| 20110012525 | DISCHARGE LAMP LIGHTING DEVICE, PROJECTOR, AND DRIVING METHOD OF DISCHARGE LAMP - In at least one embodiment of the disclosure, a discharge lamp lighting device comprises a discharge lamp driving section, a state detecting section that detects a deterioration state of an electrode of a discharge lamp, and a control unit. The control unit alternately performs a first DC driving processing and a first AC driving processing in a first section of the driving current. The control unit alternately performs a second DC driving processing and a second AC driving processing in a second section of the driving current different from the first section. According to a progress of the deterioration state of the electrode, the control unit increases a length of at least one of: (i) a period for which the first DC driving processing is performed, and (ii) a period for which the second DC driving processing is performed. | 01-20-2011 |
| 20110018456 | DISCHARGE LAMP LIGHTING DEVICE, PROJECTOR, AND DRIVING METHOD OF DISCHARGE LAMP - In at least one embodiment of the disclosure, a discharge lamp lighting device comprises a discharge lamp driving section and a control unit. The control unit alternately performs a first DC driving processing and a first AC driving processing in a first section of the driving current. The control unit alternately performs a second DC driving processing and a second AC driving processing in a second section of the driving current different from the first section. The control unit temporally changes a length of at least one of: (i) a period for which the first DC driving processing is performed, and (ii) a period for which the second DC driving processing is performed. | 01-27-2011 |
| 20110025218 | Mercury lamp and mercury lamp lighting apparatus - In an ultrahigh pressure mercury lamp that encloses mercury is enclosed in an arc tube, an electrode has a head portion whose diameter is larger than that of an axis portion and a cylindrical portion formed to project from and extend, integrally with a back end face of the head portion, wherein an inner circumference face the cylindrical portion is apart from the axis portion so as to surround the axis portion. During an alternating current lighting, a relational expression of d/(1/f)×1/2≧3.8 is satisfied, wherein a frequency, which relates to an anode operation period that is the longest in the anode operation period during which one electrode serves as an anode, is represented as f, and a distance in an axial direction from the leading edge position of the head portion of the electrode to a boundary position between the head portion and the cylindrical portion is represented as d. | 02-03-2011 |
| 20110025219 | Discharge lamp lighting apparatus - In a discharge lamp lighting apparatus, in a starting sequence of a discharge lamp, while a frequency control circuit generates a inverter driving signal corresponding to resonance frequency of a resonant circuit, a power supply circuit outputs non-load open circuit voltage that is sufficient to maintain electric discharge, even when a boosting action accompanying a resonance phenomena disappears, and then a periodic drive circuit generates the inverter driving signal to gradually decrease frequency of the inverter from a frequency corresponding to the resonance frequency of the resonant circuit, until the frequency of the inverter reaches a first threshold frequency, and wherein when the frequency of the inverter reaches the first threshold frequency, while the periodic drive circuit generates the inverter driving signal so that the frequency of the inverter turns into a stable lighting frequency, the power supply circuit outputs current that is sufficient to maintain the electric discharge of the discharge lamp. | 02-03-2011 |
| 20110025220 | HIGH EFFICIENCY GAS FILLED LAMP - The invention relates to a gas filled lamp and to a method of operating the same, the gas filled lamp including a tube filled with a gas or combination of gases, the tube comprising an anode; and a cathode spaced apart from the anode wherein an electric field can be applied across the anode and the cathode so as to cause an electron to move from the cathode to the anode. The gas filled lamp further includes magnetising means to provide a magnetic field across the tube, the direction of the magnetic field being substantially perpendicular to the direction of the electric field, wherein the ratio between the electric and magnetic fields is substantially predetermined depending upon the gas or combination of gases within the tube. | 02-03-2011 |
| 20110037400 | Constant Current Driving Circuit for Field Emission Device - A constant current driving circuit for a field emission device has a ground current of an anode electrode measured in real time and the measured ground current is fedback to vary the frequency and duty ratio of a voltage applied to gate and cathode electrodes of the field emission device, thereby causing the ground current of the anode electrode to be constantly maintained. The field emission device has an anode electrode formed on a front substrate, gate and cathode electrodes formed on a rear substrate disposed opposite to the front substrate to be spaced apart from the front substrate by a predetermined distance, and an emitter formed on a top surface of the cathode electrode. The constant current driving circuit includes current detection circuit for detecting a ground current of the anode electrode; an input power unit for applying a driving AC voltage for emitting electrons from the emitter to the gate and cathode electrodes; and a feedback circuit unit for comparing the ground current of the anode electrode detected by the current detection circuit with a predetermined reference voltage to obtain a current variation and providing the input power unit with a frequency signal for varying a frequency of the driving AC voltage or a duty ratio signal for varying a duty ratio of the driving AC voltage in accordance with the current variation. | 02-17-2011 |
| 20110037401 | POWER CONVERSION DRIVING CIRCUIT AND FLUORESCENT LAMP DRIVING CIRCUIT - A power conversion driving circuit is provided. The power conversion drive circuit includes a converting circuit, a control circuit and a load circuit. The converting circuit is coupled to an input voltage. The control circuit is coupled to the converting circuit for controlling the converting circuit to convert the input voltage to an output voltage. The load circuit includes a load detecting unit and a load. The load is coupled to the output voltage, and the load detecting unit is coupled to a detecting voltage source. The load detecting unit generates a load detecting signal to re-start the control circuit when the load circuit is inserted into the power conversion driving circuit. | 02-17-2011 |
| 20110037402 | HIGH-PRESSURE DISCHARGE LAMP LIGHTING DEVICE - The high-pressure discharge lamp lighting device of the invention includes a lighting circuit for supplying an alternating current to a high-pressure discharge lamp to cause lighting, the high-pressure discharge lamp having an arc tube in which a halogen material is enclosed and a pair of electrodes is disposed, and each electrode having a protuberance at a tip thereof. A frequency of the alternating current varies without dependency on operating data that varies as a lighting time of the high-pressure discharge lamp elapses. | 02-17-2011 |
| 20110043122 | Resonant Inverter With Sleep Circuit - A sleep circuit for use in a resonant inverter is disclosed. The sleep circuit activates a “sleep mode” (non-continuous operation) when the inverter output has no connected load, or a connected load is non-operative (e.g., fails). The “sleep mode” utilizes hysteresis control via the under voltage lockout protection feature of a control IC of the inverter. A primary DC source permanently connects to the Vcc pin of the control IC for startup (on) and burst (non-continuous) operation modes. An auxiliary DC source connects to the Vcc pin via a switch for continuous operation mode. A load current sensor controls the switch. When a sensed output current is above a threshold level, the switch connects the auxiliary DC source, and the control IC (and the inverter) operates continuously. When the sensed output current falls below the threshold, the auxiliary DC source is not provided and the inverter operates in “sleep mode”. | 02-24-2011 |
| 20110057574 | ADVANCED ELECTRONIC BALLASTS - An electronic ballast includes a rectifier circuit, having two output terminals coupled to a first node and a second node; a first capacitor having two ends coupled to the first node and the second node; an inverter, having a first terminal coupled to the first node, a second terminal coupled to the second node and a third terminal; an inductor, having a first end coupled to the third terminal of the inverter and a second end for coupling a first terminal of a lamp; a second capacitor, having two ends for coupling a second terminal and a third terminal of the lamp; a third capacitor, having two ends coupled to the first node and a third node, wherein the third node is further for coupling a fourth terminal of the lamp; and a diode, having two ends coupled to the third node and the second node. | 03-10-2011 |
| 20110080104 | Line synchronized Electrical Device And Controlling Method Thereof - A controlling method for an electrical apparatus and a device thereof are provided in the present invention. The method includes the steps of: (a) providing an electrical apparatus and an AC power; (b) generating a control signal synchronized to the AC power; and (c) controlling the electrical apparatus by the control signal. The device includes a threshold detector, a phase-locked loop coupled to the threshold crossing detector and an output circuit coupled to the phase-locked loop. | 04-07-2011 |
| 20110089847 | Energy-Saving Lamp with Remote Control and Button Dimming Feature - This invention relates to a kind of dimmable energy-saving lamp with remote control and buttons dimming feature comprising: a power supply module ( | 04-21-2011 |
| 20110089848 | DISCHARGE LAMP BALLAST APPARATUS - A discharge lamp ballast apparatus includes an F/F | 04-21-2011 |
| 20110095694 | LIGHT SOURCE WITH IMPROVED DIMMING BEHAVIOR - A light source ( | 04-28-2011 |
| 20110115393 | ADAPTIVE SLIDING-FREQUENCY TRIGGERING IGNITION METHOD FOR ELECTRONIC BALLAST OF HIGH PRESSURE GAS DISCHARGE LAMP - An adaptive sliding-frequency triggering ignition method for electronic ballast of high pressure gas discharge lamp includes the steps of: measuring an accurate value of free oscillation frequency of the ballast load loop by using a single-chip before sliding-frequency triggering ignition, implementing safe and reliable sliding-frequency triggering ignition after calculating the initial frequency and ending frequency of sliding-frequency triggering ignition according to the accurate value. The method can safely and reliably finish sliding-frequency triggering ignition course, thus improving the parameters such as the quality, life of the high pressure gas discharge lamp electronic ballast. | 05-19-2011 |
| 20110121744 | CONTROLLABLE-LOAD CIRCUIT FOR USE WITH A LOAD CONTROL DEVICE - A load control device for controlling the amount of power delivered from an AC power source to an electrical load is operable to conduct enough current through a thyristor of a connected dimmer switch to exceed rated latching and holding currents of the thyristor. The load control device comprises a controllable-load circuit operable to conduct a controllable-load current through the thyristor of the dimmer switch. The load control device disables the controllable-load circuit when the phase-control voltage received from the dimmer switch is a reverse phase-control waveform. When the phase-control voltage received from the dimmer switch is a forward phase-control waveform, the load control device is operable to decrease the magnitude of the controllable-load current so as to conduct only enough current as is required in order to exceed rated latching and holding currents of the thyristor. | 05-26-2011 |
| 20110121745 | Modified Alternating Current Operation of a High-Pressure Discharge Lamp - A method for operating a high pressure discharge lamp with an alternating current, comprising providing the alternating current with a DC component differing from zero. | 05-26-2011 |
| 20110133663 | HIGH-PRESSURE DISCHARGE LAMP - A high-pressure discharge lamp, which has no electrodes and is excited by means of high-frequency electromagnetic waves, may include an ceramic elongated discharge vessel, which has an axis, where the discharge vessel has a filling that forms a plasma, when radio frequency power (RF) is coupled into the filling from the base body, where the filling comprises a gas and at least one metal halide, where a circuit for operation of the lamp is coordinated, which provides RF power, so that the coupled-in RF power vaporizes the metal halide, which leads to light emission, wherein the discharge vessel is specially designed for operation with acoustic modulation control of the plasma flow, wherein the discharge vessel is divided into a central part with at least approximately constant internal diameter and two ends, whose internal diameter reduces towards the end. | 06-09-2011 |
| 20110140623 | ELECTRONIC HID BALLAST WITH CURRENT SOURCE/SINK TO POWER RECESSED CAN INSULATION DETECTOR - Electronic ballasts, driver apparatus, and methods are provided in which a heating current is generated by the driver to power a resistive heating element of an insulation detector associated with a recessed can fixture using a regulated current source/sink circuit. | 06-16-2011 |
| 20110140624 | CIRCUIT AND METHOD FOR OPERATING A HIGH PRESSURE LAMP - The invention relates to a circuit for operating a high pressure discharge lamp La. The circuit comprises input terminals for connecting to a source of supply voltage; first capacitive means C1 coupled to the input terminals and second capacitive means C2 coupled to the input terminals parallel to the first capacitive means C1. A switchable element D1 is provided between the first and second capacitive means C1, C2 for blocking a current with which the second capacitive means C2 in use charge the first capacitive means C1. Output terminals for connection of the high pressure discharge lamp La and the inductive means are provided and a commutator BR coupled to said input terminal and to said output terminals for supplying an alternating current to the high pressure discharge lamp La when the lamp is connected to said output terminals. The circuit comprises a pulse supply for supplying to the output terminals a current pulse in a later part of a half period of the alternating current. | 06-16-2011 |
| 20110140625 | METHOD AND SYSTEM FOR OPERATING A HIGH INTENSITY DISCHARGE LAMP - The present invention provides a lighting system | 06-16-2011 |
| 20110181196 | DIMMER FOR A LIGHT EMITTING DEVICE - Exemplary embodiments of the present invention relate to a dimmer for a light emitting device using an alternating (AC) voltage source. The dimmer includes a switch to be switched in response to a switching control signal and to deliver an AC voltage of an AC voltage source to the light emitting device, a current detector to detect an electric current to be provided to the light emitting device and to output a current detection signal, and a controller to output the switching control signal in response to a dimming control signal and the current detection signal. | 07-28-2011 |
| 20110193490 | Dimmer Adaptable to Either Two or Three Active Wires - A dimmer adaptable to either two (H, DH) or three (H, N, DH) active wires includes a first full-wave rectifier (D | 08-11-2011 |
| 20110204807 | TWO-WIRE AC SWITCH - A two-wire AC switch suppressing heat from a bidirectional switch element inside the switch is provided. The two-wire AC switch | 08-25-2011 |
| 20110221355 | Light source apparatus - In a light source apparatus, an alternating current is supplied to a high pressure discharge lamp from a power supply apparatus to light the lamp. The arrangement state of the lamp is detected by a detection circuit. When the lamp is horizontally arranged, electric energy, whose flow direction is from one electrode of the lamp to the other electrode, is set to be approximately the same as electric energy, whose flow direction is from the other electrode to the one electrode. When the lamp is vertically arranged, while a cycle, which is the same as a polarity change cycle in the horizontal arrangement, is maintained, electric energy, which flows from an upper electrode to a lower electrode, is set to be smaller than electric energy, which flows from the lower electrode to the upper electrode. | 09-15-2011 |
| 20110221356 | Light source apparatus - A first energy ratio A/B of a first alternating current of a steady frequency supplied to a lamp is set to a value C, when the lamp is horizontally placed. A second alternating current of a lower frequency, whose second energy ratio A/B is set to the value C, is inserted. When the lamp is vertically placed, a first energy ratio A′/B′ is set to the value C or a value D, which is smaller than the value C. A second ratio A′/B′ is set to the value D or a value E, which is lower than the value C. A and A′ each represents an energy that flows from a first electrode of a pair of electrodes of the lamp to a second electrode of the pair. B and B′ each represents an energy that flows from the second electrode to the first electrode. | 09-15-2011 |
| 20110221357 | Circuit Arrangement and Method for Operating a High Pressure Discharge Lamp - A method for operating a high pressure discharge lamp, with the high pressure discharge lamp being operated by a current inverter with a square wave lamp current having a positive phase with positive current flow and a negative phase with negative current flow, and with the current inverter being controlled by a control arrangement wherein the method comprises the steps of measuring a value for the positive current flow representing the lamp wattage or the square wave lamp current, measuring a value for the negative current flow representing the lamp wattage or the square wave lamp current; calculating a predetermined setpoint value in each case from a guide variable of a lamp wattage or of the square wave lamp current and the measured value for the phase with positive current flow; calculating a predetermined setpoint value in each case from a guide variable of a lamp wattage or of the square wave lamp current and the measured value for the phase with negative current flow; and outputting the two predetermined setpoint values to the current inverter | 09-15-2011 |
| 20110227498 | 3-DIMENSION FACET LIGHT-EMITTING SOURCE DEVICE AND STEREOSCOPIC LIGHT-EMITTING SOURCE DEVICE - A 3-dimension facet light-emitting source device including a transparent container, an anode plate, a cathode plate, a plurality of transparent plates and a low-pressure gas layer is provided. The transparent container has a sealed space. The transparent plates are disposed between the anode plate and the cathode plate, and have a fluorescent layer thereon respectively. The lower pressure gas layer is filled in the sealed space to induce electrons emitting from the cathode plate, and the electrons fly in a direction parallel to the transparent plates and hit each fluorescent layer to emit light, so as to form a set of 3-dimension facet patterns. | 09-22-2011 |
| 20110241557 | HOLDING CURRENT CIRCUITS FOR PHASE-CUT POWER CONTROL - Holding current circuits and lighting assemblies comprising same are provided. Holding current circuits may be connected to loads to ensure that the load and holding current circuit together draw at least a holding current from a dimmer when the dimmer is in conduction. A holding current circuit may comprise a controlled current source configured to selectively draw current from a dimmer. The controlled current source draws current according to a control signal based on the conduction state of the dimmer and the sum of the currents in a load and the controlled current source. The control signal is generated by a current controller configured to generate the control signal to cause the to cause the controlled current source to draw a supplementary current at least as great as the difference between the holding current and the load current when the dimmer is in conduction and the load current is less than the holding current. | 10-06-2011 |
| 20110273106 | DRIVING CIRCUIT OF LIGHT-EMITTING ELEMENT AND METHOD OF GENERATING DRIVING SIGNAL THEREFOR - A driving circuit includes a first delay circuit, a rise-detection circuit, a fall-detection circuit, a first filter, a second filter, and an adder. The first delay circuit delays an input signal. The rise-detection circuit detects a rise of the input signal. The fall-detection circuit detects a fall of the input signal. The first filter gives a first gain-frequency response to an output signal of the rise-detection circuit. The second filter gives a second gain-frequency response to an output signal of the fall-detection circuit. The adder adds an output signal of the first filter and an output signal of the second filter to an output signal of the first delay circuit. | 11-10-2011 |
| 20110279052 | VARIABLE LOAD LINE GAS CURVE INTERCEPT METHOD TO OPTIMIZE SYSTEM EFFICIENCY - The operation of gas discharge devices involves stabilizing drive stage with a highly dynamic load exhibiting both negative resistance and non-linear behavior. Stabilization is typically accomplished by inserting impedance in series with the plasma load so the combination impedance has a voltage division that is characterized by the intersection of the linear series impedance and the instantaneous voltage-current. This is stable as long as there is an ample excess of voltage driving the plasma/series impedance complex. However providing series impedance that insures stable operation over varying power levels, lamp types/chemistries and changes resulting from aging can lead to inefficient operation as a result of either high voltage/power drops in the series impedance or a high source voltage driving smaller impedance. A method to optimize the series impedance and driving voltage through a dynamic adjustment process of both the voltage and impedance parameters to provide stable gas plasma drive and maximize system efficiency is described. | 11-17-2011 |
| 20110291580 | ILLUMINATING MODULE CAPABLE OF COMPENSATING CURRENT - An illuminating module is capable of compensating current. The illuminating module can tune the light with a light modulating circuit. The illuminating module includes an illuminating unit and a compensating circuit. The illuminating unit includes a power source, a load impedance, and a level unit. The level unit has a level potential which changes with the light modulating circuit. The compensating circuit includes a first resistor, a first switch, and a judging unit. The first resistor is coupled to the power source. The first switch is coupled to the first resistor and the illuminating unit. The judging unit is coupled to the level unit and the first switch. When the level potential is less than a predetermined potential, the judging unit makes the first switch to be at the conducting state to parallel connect the first resistor and the load impedance. | 12-01-2011 |
| 20110291581 | Rejecting noise transients while turning off a fluorescent lamp using a starter unit - A local minimum of a current monitoring signal is identified by a starter unit that turns off a fluorescent lamp without using a wall switch. Closing a main switch in the starter unit stops an illuminating current from flowing through a gas in the lamp. The local minimum of the current monitoring signal is reached when an increasing valid sample is identified following four valid samples. A sample is valid if it does not differ from the preceding valid sample by more than a threshold difference based on known properties of the signal. By skipping invalid samples, the local minimum is accurately determined to have been reached despite transient noise spikes in the signal that would trip any voltage threshold used to locate the local minimum. When the main switch is opened at a predetermined time after the local minimum, the illuminating current does not again flow through the gas. | 12-01-2011 |
| 20110309763 | Alternating turn off timing of a fluorescent lamp starter unit - A starter unit (for example, an RF-enabled and replaceable starter unit) has an ability both to turn on and to turn off a fluorescent lamp. The starter unit detects whether a ballast in the circuit with the fluorescent lamp is of a first type (for example, an L-type ballast) or is of a second type (for example, a C-type ballast). If the determination is that the ballast is of the first type, then the starter unit turns off the lamp in a first way (for example, using C-type timing and then using L-type timing alternatingly). If the determination is that the ballast is of the second type, then the starter unit turns off the lamp in a second way (for example, using only C-type timing). The same starter unit design is usable both in single-lamp fixtures and in multi-lamp fixtures where a mix of ballast types may be used. | 12-22-2011 |
| 20110316438 | FIXTURE FOR EMULATION OF OMNIDIRECTIONAL OR DIRECTED CONTINUOUS LIGHTING - A fixture for providing omnidirectional continuous lighting comprises a light source ( | 12-29-2011 |
| 20120007518 | HALOGEN LAMP FOR PULSE OPERATION - The invention relates to a halogen automotive lamp for pulse width operation, a lighting assembly including a halogen lamp and to a method of operating a halogen lamp. The lamp comprises a transparent lamp vessel with a gas filling comprising a rare gas component and a halogen component. A filament is arranged within the vessel. In conventional halogen lamps operation with pulsed electrical power, such as e.g. PWM operation of automotive halogen lamps for cornering and bending light lead to shortened lifetimes. In order to propose a lamp with increased lifetime under pulse operation, the gas filling comprises nitrogen in an amount of 0.1-5 mol-%. It has surprisingly been found that filament deformation may be counteracted by the corresponding small amount of nitrogen. | 01-12-2012 |
| 20120013265 | Led controller with de-flicker function and led de-flicker circuit and method thereof - The present invention discloses an LED controller with de-flicker function and an LED de-flicker circuit and method thereof. The LED controller includes: a duty ratio calculation circuit for receiving a pulse width modulation (PWM) signal and generating a duty input signal, indicating a digital duty ratio of the PWM signal; an LED de-flicker circuit for receiving the duty input signal and generating a duty output signal wherein a noise in the duty input signal is filtered; and a dimming circuit for receiving the duty output signal and generating a dimming signal to control an LED circuit; wherein the duty output signal remains unchanged when the variation of the duty input signal is not larger than a hysteresis threshold, and the duty output signal follows the duty input signal when the variation of the duty input signal is larger than the hysteresis threshold. | 01-19-2012 |
| 20120025731 | BALLAST FOR HIGH PRESSURE DISCHARGE LAMP - The present invention provides a ballast for a high pressure discharge lamp including a driving circuit for supplying an alternating power to a high pressure discharge lamp. In the ballast of the present invention, the high pressure discharge lamp includes: a bulb; and a startup light source disposed in a vicinity of the bulb and assisting ignition of the bulb. The startup light source has a pair of electrodes which are capacitively coupled. The driving circuit includes: a bridge unit for inverting a lamp current; a current regulator unit for regulating the lamp current; and an igniter unit for generating an ignition voltage. At the ignition, a voltage containing a frequency component higher than a driving frequency during a steady driving of the bulb is applied to the startup light source. | 02-02-2012 |
| 20120043906 | Mixed-Signal Network for Generating Distributed Electrical Pulses - A mixed-signal network for generating distributed electrical pulses includes a control device and one or more networked mixed-signal devices. The control device generates digital and analog outputs that are directly connected to, or daisy-chained between, the networked mixed-signal devices. Each mixed-signal device responds under certain input conditions by generating one or more electrical pulses with characteristics controllable by the control device. | 02-23-2012 |
| 20120074862 | LAMP AND ILLUMINATION SYSTEM AND DRIVING METHOD THEREOF - A lamp and an illumination system and a driving method thereof are provided. The lamp includes a lighting unit, a conversion unit, and a driver. The conversion unit is capable of receiving an input pulse width modulation (PWM) signal and converting the input PWM signal into an output PWM signal, wherein a frequency of the input PWM signal and a frequency of the output PWM signal are different. The driver is coupled between the lighting unit and the conversion unit. The driver is capable of receiving the output PWM signal and generating a driving signal to drive the lighting unit according to the output PWM signal. | 03-29-2012 |
| 20120074863 | Method And Apparatus For Driving A Pulse Modulated Output Circuit - Light Emitting Diodes (LEDs) are increasingly used in illumination applications. To control multiple Light Emitting Diodes (LEDs), or any other controllable light source, this document introduces a single-wire multiple-LED power and control system. Specifically, individually controlled LED units are arranged in a series configuration that is driven by a control unit located at the head of the series. Each of the individually controlled LED units may comprise more than one LED that is also individually controllable. The head-end control unit provides both electrical power and control signals down a single wire to drive all of the LED units in the series in a manner that allows each LED unit to be controlled individually or in assigned groups. | 03-29-2012 |
| 20120081023 | Power Conversion and Control Systems and Methods for Solid-State Lighting - A solid-state lighting system comprises a plurality of light-emitting devices (e.g., light-emitting diodes) and an alternating current to direct current (AC-DC) converter that converts AC power to DC power for powering the plurality of light-emitting devices. The AC-DC converter is configured to perform AC-DC conversion directly, without the need for or use of a bridge rectifier or step-down transformer. According to one aspect of the invention, the light-emitting devices of the solid-state lighting system are autonomous and individually powered by a plurality of DC power supplies generated from the DC power produced by the AC-DC converter. According to another aspect, a plurality of phase-offset dimmer control signals are generated based on waveform distortions in a dimming signal produced by a conventional dimmer switch. The phase-offset dimmer control signals are used to individually control the dimming of the light-emitting devices. | 04-05-2012 |
| 20120081024 | UTILITY CONTROL SYSTEM AND METHOD - Embodiments of the present invention provide for the control of a powered utility. A circuit board, an onboard controller located on the circuit board, and a daughterboard connector also located on the circuit board are utilized. The onboard controller is configured to provide a first level of control functionality to the system. The first level of control functionality includes the ability to transfer the powered utility between an operating state and an off state. The daughterboard connector is configured to accept a daughterboard, and that daughterboard is configured to increase the control functionality of the system above the first level of control functionality to a second level of control functionality. | 04-05-2012 |
| 20120091909 | METHOD AND DEVICE FOR PROGRAMMING A MICROCONTROLLER - A programming device ( | 04-19-2012 |
| 20120098454 | CURRENT OFFSET CIRCUITS FOR PHASE-CUT POWER CONTROL - Apparatus for maintaining at least a holding current in a leading-edge phase-cut dimmer during a period of transient voltage variations, the apparatus connectable to the dimmer and connectable to a load connected to draw current from the dimmer. The apparatus may comprise an edge detector connected to receive a voltage from the dimmer and generate a leading-edge signal in response to a leading-edge of a phase-cut waveform, and a current offset circuit connected to receive the leading-edge signal and draw a supplementary offset current in response to the leading-edge signal, wherein the supplementary offset current is sufficient to maintain at least a holding current in the dimmer during the period of transient voltage variations. The current offset circuit may comprise a holding current circuit which also draws supplementary current in response to an instantaneous value of load current. | 04-26-2012 |
| 20120126716 | ELECTRON EMITTING DEVICE AND DRIVING METHOD THEREOF - A driving method of an electron emitting device which includes a first electrode, a particle layer formed on the first electrode and including insulating particles, and a second electrode formed on the particle layer includes: applying a voltage between the first and second electrodes to emit electrons from the first electrode so that the electrons are accelerated through the particle layer and emitted from the second electrode, wherein the applied voltage includes pulses which have a first frequency and are oscillated at a second frequency lower than the first frequency. | 05-24-2012 |
| 20120139437 | ELECTRICAL DRIVE SCHEME FOR PIXELS IN ELECTRONIC DEVICES - An apparatus and method for producing a luminescent device using a pulsed electrical power feed. The pulsed feed produces a lower initial drop in luminescent efficiency compared to a constant power feed. This method and apparatus avoid traditional processes such as burn-in, used to establish more uniform device performance. | 06-07-2012 |
| 20120161662 | DIGITAL PWM GENERATOR AND APPARATUS FOR DRIVING LIGHT EMITTING DEVICE - There is provided a digital PWM generator according to a first exemplary embodiment of the present invention including: an A/D converter dividing a predetermined reference voltage into a plurality of sections corresponding to a predetermined first set value, searching a section to which the magnitude of an input voltage Vin corresponds, among the plurality of sections, and converting a value corresponding to the searched section into a digital signal; a frequency selector providing a counting number by counting a predetermined high-speed counting clock during a one-cycle section of a predetermined reference clock; and a PWM signal generator converting the digital signal from the A/D converter into a ratio value corresponding to a ratio for the reference voltage and generating a PWM signal having a controlled duty ratio of the reference clock by using the ratio value and the counting number from the frequency selector. | 06-28-2012 |
| 20120161663 | ELECTRICALLY DRIVEN SINGLE PHOTON SOURCE - The present invention relates to a single photon source | 06-28-2012 |
| 20120187859 | Organic Electroluminescent Component - The invention relates to an organic electronic luminescent component with an arrangement of organic layers formed between an electrode and a counter electrode, wherein said arrangement of organic layers is electrically insulated from the electrode and the counter electrode and comprises a light-emitting layer and a charge carrier generation region allocated to the light-emitting layer, wherein the charge carrier generation region is configured to provide positive and negative charge carriers at an application of an electrical AC voltage to the electrode and the counter electrode and wherein a pn-layer transition is formed in the charge carrier generation region by means of a p-doped organic layer and a n-doped organic layer arranged next to the p-doped organic layer. | 07-26-2012 |
| 20120187860 | CIRCUIT ASSEMBLY FOR CONTROLLING AN OPTICAL SYSTEM TO GENERATE OPTICAL PULSES AND PULSE BURSTS - A circuit assembly controlling an optical system to generate optical pulses is provided. The optical system includes a seed light source optically coupled to an amplitude modulator. The circuit assembly includes a control circuit which generates a pulsed seed drive signal for driving the seed laser source, as well as logic signals defining successions of ON and OFF states and having a predetermined relative timing relationship. One or more of the logic signals is delayed by a corresponding programmable delay line to adjust the relative timing relationship between the logic signals. A logic gating module combines the logic signals according to one or more logical rule, thereby providing a modulator drive signal. Using this circuit assembly, the optical system outputs an optical pulse at each ON state of the modulator drive signal synchronized with the passage of one of the seed optical pulses through the amplitude modulator. | 07-26-2012 |
| 20120187861 | Illuminated pushbutton switch with embedded interface and driver logic - Illuminated pushbutton switches are improved by replacing the traditional time delay relays, Boolean interface logic or driver components often incorporated within interface wiring and harnesses with a subminiature electronic logic module located within the illuminated pushbutton switch housing. This Logic Module provides numerous additional benefits beyond the standard illuminated push button switch by incorporating functional capability such as pulse timing, edge detecting or Boolean logic that allow the unit to replace external electro mechanical relays, diode logic, or time delay relays that are typical in current applications. These additional features provide enhancements by allowing lower size and weight, longer switch life, no electrical spikes, remote set and reset capability, display blinking, and high reliability electronic driver circuits that can drive modest electrical loads. | 07-26-2012 |
| 20120212149 | Remotely Powered Optical Output Labels - According to one exemplary embodiment, an apparatus, system and method for a remotely powered optical output label is disclosed. The system includes a transmitting device including at least one transmitting antenna and a power source. A receiving label is in remote communication with the transmitting device, the receiving label including a receiving antenna and a capacitor connected to at least one optical element. The optical element may be selectively controlled and powered to variably emit light using energy transmitted by the transmitting device. | 08-23-2012 |
| 20120235592 | Modulated LED - The invention relates to a LED, and more particularly, to provide a circuit and a modulator to more efficiently drive a LED resulting in improving the matching between power source and LED, lowering LED junction temperature and emitting brighter, richer and more natural colors in a more capacitive way. | 09-20-2012 |
| 20120249009 | High speed light emitting semiconductor methods and devices - A method including: providing a transistor structure that includes a base region of first semiconductor type between semiconductor emitter and collector regions of second semiconductor type; providing, in the base region, at least one region exhibiting quantum size effects; providing emitter, base, and collector electrodes respectively coupled with emitter, base, and collector regions; applying electrical signals, including a high frequency electrical signal component, with respect to the emitter, base, and collector electrodes to produce output spontaneous light emission from the base region, aided by the quantum size region, the output spontaneous light emission including a high frequency optical signal component representative of the high frequency electrical signal component; providing an optical cavity for the light emission in the region between the base and emitter electrodes; and scaling the lateral dimensions of the optical cavity to control the speed of light emission response to the high frequency electrical signal component. | 10-04-2012 |
| 20120286689 | DIMMABLE SCREW-IN COMPACT FLUORESCENT LAMP HAVING INTEGRAL ELECTRONIC BALLAST CIRCUIT - A dimmable ballast circuit for a compact fluorescent lamp controls the intensity of a lamp tube in response to a phase-control voltage received from a dimmer switch. The ballast circuit generates a lamp current through the lamp tube having a substantially constant envelope such that flicker in the lamp tube and electromagnetic interference (EMI) noise on an AC voltage supply are minimized. The dimmable ballast circuit comprises a high speed control circuit characterized by a cutoff frequency much greater than a frequency of a voltage ripple on a bus voltage of the ballast circuit. The dimmable ballast circuit may also comprise a non-linear amplifier circuit amplifying a lamp-current-feedback signal representative of the magnitude of the lamp current through the lamp. | 11-15-2012 |
| 20120299504 | DISCHARGE LAMP LIGHTING APPARATUS - In a discharge lamp lighting apparatus comprising a short arc type discharge lamp and a power supply unit, a relation of the natural frequency f | 11-29-2012 |
| 20130015778 | TRIODE-TYPE FIELD EMISSION DEVICE AND METHOD OF MANUFACTURING THE SAMEAANM LI; Yuan-YaoAACI Min-HsiungAACO TWAAGP LI; Yuan-Yao Min-Hsiung TWAANM Youh; Meng-JeyAACI New Taipei CityAACO TWAAGP Youh; Meng-Jey New Taipei City TWAANM Tseng; Chun-LungAACI Alian ShiangAACO TWAAGP Tseng; Chun-Lung Alian Shiang TWAANM Wu; Hung-ChihAACI New Taipei CityAACO TWAAGP Wu; Hung-Chih New Taipei City TWAANM Juan; Yen-MingAACO USAAGP Juan; Yen-Ming USAANM Lin; Wang-HuaAACO USAAGP Lin; Wang-Hua US - A triode-type field emission device and method of manufacturing the same, suitable for use in screen print process of curved or planar substrate, comprising the following steps: firstly, form a cathode and a gate on a cathode substrate at the same time by means of screen printing, and a gap is located between gate and cathode, to avoid short circuit or interference; next, form a hedgehog-shape field emission layer on at least said cathode; then, form a transparent conductive layer and a light emitting layer sequentially on an anode substrate; and finally, dispose cathode substrate and anode substrate in parallel and spaced apart, and package them into a triode-type field emission device. Bias of cathode and gate can be controlled to achieve local adjustment of light. Also, gate may serve as an emitter, to increase field emission efficiency and its service life. | 01-17-2013 |
| 20130020962 | FLAMELESS CANDLE CIRCUIT WITH MULTIPLE MODES - According to embodiments of the present invention, a flameless candle circuit includes an application-specific integrated circuit (“ASIC”) having a first power terminal, a second power terminal, and an output. The circuit also includes a light-emitting diode (“LED”) and a single-pole switch. The LED is configured to receive a signal from the output of the ASIC. The single-pole switch is configured to selectively provide the battery voltage to at least one of the first power terminal and the second power terminal. Additionally, the single-pole switch is configured to remove the battery voltage from both of the first power terminal and the second power terminal to turn the ASIC off. The ASIC is configured to drive the LED in a first mode when the battery voltage is provided to the first power terminal. The ASIC is also configured to drive the LED in a second mode when the battery voltage is provided to the second power terminal. | 01-24-2013 |
| 20130026945 | METHOD AND SYSTEM FOR MODIFYING A BEACON LIGHT SOURCE FOR USE IN A LIGHT BASED POSITIONING SYSTEM - In one aspect, the present disclosure related to a method for modifying a beacon light source for use in a light-based positioning system. In some embodiments, the method includes selecting a modulation scheme for the light source, determining a duty cycle for the light source based on the modulation scheme, the duty cycle having a proportion of time the light source is in an on state and a corresponding proportion of time the light source is in an off state, the proportion of time the light source is in an off state resulting in reduced luminosity of the light source, and supplying additional power to the light source to compensate for the reduced luminosity of the light source by the duty cycle. | 01-31-2013 |
| 20130026946 | LED DRIVE CIRCUIT, LED ILLUMINATION COMPONENT, LED ILLUMINATION DEVICE, AND LED ILLUMINATION SYSTEM - An LED drive circuit is an LED dive circuit that receives an alternating voltage to drive an LED, and includes a current remove portion that removes a current from a current supply line that supplies an LED drive current to the LED. If an input current to the LED drive circuit is an unnecessary current, the LED does not light because of current removal by the current remove portion. If the input current to the LED drive circuit turns into the LED drive current from the unnecessary current, the current remove portion decreases the amount of current removed. | 01-31-2013 |
| 20130038237 | BALLASTED LAMP SOCKET FOR A COMPACT FLUORESCENT LAMP - A ballasted lamp socket for a gas discharge lamp, such as a compact fluorescent lamp, is adapted to replace an Edison screw-in lamp socket in a ceiling mounted light fixture, or a table or floor lamp. The ballasted lamp socket comprises a lamp-receiving portion adapted to be coupled to the gas discharge lamp, an enclosure mechanically coupled to the lamp-receiving portion, a dimming ballast circuit electrically coupled to the lamp-receiving portion and housed within the enclosure, and first and second electrical connections. The ballast portion is adapted to receive an AC line voltage and to generate a high- frequency AC voltage for driving the gas discharge lamp and controlling the light intensity of the gas discharge lamp between a high-end intensity and a low-end intensity. The first and second electrical connections are operable to receive the AC line voltage and to provide the AC line voltage to the ballast circuit. | 02-14-2013 |
| 20130043804 | POWER SUPPLY SYSTEM - A power supply system includes an illumination circuit for receiving an AC voltage and a control circuit for receiving a DC voltage. The illumination circuit includes a first switch unit and at least one light emitting unit. The control circuit includes a first winding unit, a second switch unit, and a second winding unit. The second winding unit provides the DC voltage to the first winding unit by the second switch unit. The first winding unit provides the AC voltage to the light emitting unit by the first switch unit. The light emitting unit emits light when receives the AC voltage. | 02-21-2013 |
| 20130049627 | SEGMENTED ELECTRONIC ARC LAMP BALLAST - Described herein are segmented electronic ballasts for a high power are lamp, such as a High Intensity Discharge (“HID”) lamp, capable of drop-in replacement of a pre-existing magnetic ballast and methods of use thereof. In certain aspects, the segmented electronic ballasts described herein include a first housing containing a driver circuit configured to receive electrical power from a source of electrical power and configured to output a conditioned power signal; and also include a second housing containing a striker circuit connected to the driver circuit and configured to receive the conditioned power signal and ignite the lamp. In certain aspects, the methods described herein include removing a transformer of the pre-existing magnetic ballast from a transformer mounting position; and also include fixing the first housing to the transformer mounting position. | 02-28-2013 |
| 20130082620 | HIGH FREQUENCY POWER SUPPLY DEVICE - A high frequency power supply device includes a high frequency power generation unit configured to output a high frequency power to be supplied to a load and a control unit configured to detect a mean value of the high frequency power to control the high frequency power generation unit. A power change period detection unit detects a period of a level change of the high frequency power that is detected at an output side of the high frequency power generation unit due to a periodic change of a level of a high frequency power that is given to a load from another high frequency power supply device as a power change period T | 04-04-2013 |
| 20130119885 | WIRELESS ILLUMINATION CONTROLLER WITH THE FUNCTION TO SET THE LOWEST DRIVING POWER - A wireless illumination controller with the function to set the lowest driving power includes a microprocessor, a driver, an illumination control switch, and a wireless receiving module. The microprocessor is built in with an adjustable lowest power and connected with the driver, the illumination control switch, the wireless receiving module and a power processing module. The illumination control switch is used to set the lowest power of the microprocessor. After the wireless receiving module receives a wireless illumination adjustment command, the power of the driving signal output from the driver is controlled to be not lower than the lowest power. Therefore, when a user adjusts the illumination, the driving power is never lower than the lowest driving power of the corresponding light bulb, thereby avoiding flickering. | 05-16-2013 |
| 20130119886 | Suprachiasmatic Nucleus Inducing, Melatonin Suppressing Light Emitting Device to Enhance Wake Cycle - A light emitting device to awaken or alert an animal by stimulating the Suprachiasmatic Nucleus in the brain to suppress melatonin secretion and change gene expression in the brain. The device can be programmed for an initiation time, color of light, brightness, frequency of pulsating light, and level of gradual intensity. It has the advantage of being silent, does not to disturb other people sleeping in the same room and user is more cognitively alert. | 05-16-2013 |
| 20130127364 | FRONT FACING PIGGYBACK WAFER ASSEMBLY - Front facing piggyback wafer assembly. In accordance with an embodiment of the present invention, a plurality of piggyback substrates are attached to a carrier wafer. The plurality of piggyback substrates are dissimilar in composition to the carrier wafer. The plurality of piggyback substrates are processed, while attached to the carrier wafer, to produce a plurality of integrated circuit devices. The plurality of integrated circuit devices are singulated to form individual integrated circuit devices. The carrier wafer may be processed to form integrated circuit structures prior to the attaching. | 05-23-2013 |
| 20130154501 | Control of Operational Parameters of Operational Devices for LEDs - The invention relates to a method for defining an operational parameter of an operational device for lighting means. According to the method, a voltage supply of the operational device is preferably switched on/off manually, an on/off switching is evaluated by the operational device as to whether at least one first predetermined criterion is fulfilled, for example, time constants or repetition rates, in this is the case, a continuous, preferably cyclic change of the predetermined operational parameters is switched on by the operational device, the changed operational parameter is returned to the user directly or indirectly, optically and/or acoustically, and the actual value of the changed operational parameters is maintained at a moment in time for a subsequent operation of the lighting means to which an additional on/off switching of the voltage supply fulfills at least one second criterion. | 06-20-2013 |
| 20130249429 | SYSTEMS AND METHODS FOR PROVIDING POWER AND DATA TO LIGHTING DEVICES - Systems and methods are provided for lighting systems, including high output lighting systems for various environments. The lighting systems include a lighting controller for driving lighting modules and transmitting a data signal to the lighting modules. The data signal varies between logical states. The lighting controller provides a low loss rectified power signal. The lighting controller further provides data within the power signal by forming a positive polarity rectified power waveform corresponding to data in a first state and a negative polarity rectified waveform signal corresponding to data in a second state using substantially loss-less circuitry. | 09-26-2013 |
| 20130271025 | DIMMER SWITCH HAVING AN ALTERNATE FADE RATE WHEN USING IN CONJUNCTION WITH A THREE-WAY SWITCH - A dimmer switch uses different fade rates when turning on or off lighting load depending on a device used to adjust the lighting load. For example, the dimmer switch uses a first fade rate when turning off a lighting load in response to an actuation of a local actuator or accessory switch and uses a second fade rate faster than the first fade rate when turning off the lighting load in response to an actuation of a connected three-way switch may be provided. The dimmer switch may slowly turn off the lighting load in response to an actuation of the actuator to provide an aesthetically pleasing reduction in the intensity of the lighting load. When a user actuates the three-way switch to turn off the lighting load, the dimmer switch quickly reduces the intensity of the lighting load to approximately zero percent as may be expected by the user. | 10-17-2013 |
| 20130271026 | Discharge Lamp and Discharge Lamp Apparatus - There is provided a discharge lamp of an embodiment includes a burner having a light emitting part, and a disk-shaped flange which is capable of holding the burner so that the light emitting part is positioned at a front end side of the flange. The flange includes a resin part formed at an edge of the flange, and a metal part formed to be embedded in the resin part. | 10-17-2013 |
| 20130300311 | LIGHT EMITTING DIODE LIGHTING DEVICE WITH DUTY CYCLE CAPABLE OF BEING TUNED - An LED lighting device is provided. The LED lighting device includes a processing unit, a sensor, a MOSFET, and an LED. When the sensor detects a frequency or voltage fluctuation, the processing unit modulates the duty cycle of the MOSFET to reduce the energy consumption of the LED light device and improve the efficiency of luminance of the LED lighting device. | 11-14-2013 |
| 20130320877 | Remote Control of a Legacy Fluorescent Lamp Fixture - A legacy-type fluorescent lamp fixture involves a magnetic ballast and a starter unit socket. Power savings are realized by using a retrofit fluorescent lamp assembly in place of the fluorescent lamp that would ordinarily by held in the fixture. The retrofit assembly may, for example, have a smaller fluorescent lamp. A digitally controlled electronic ballast within the retrofit assembly drives the smaller fluorescent lamp efficiently, thereby achieving power savings. In addition, an RF-enabled switch is installed in the starter unit socket. The RF-enabled switch communicates multi-bit digital control signals in serial fashion from the starter socket, through existing wires of the fixture, through the lamp holders of the fixture, and into the retrofit assembly. The electronic ballast receives these signals, decodes them, and in response turns on or turns off its lamp as commanded. Additional power savings are thereby achieved by keeping the lamp off when it is not needed. | 12-05-2013 |
| 20140049184 | FIELD EMISSION DISPLAY - A field emission display is also provided. The field emission display includes a plurality of pixel units. Each of the plurality of pixel units includes a first electrode located on the insulating substrate; a plurality of first electron emitters located on and electrically connected to the first electrode; a first phosphor layer located on the first electrode; a second electrode located on the insulating substrate and spaced from the first electrode, wherein the second electrode extends at least partly around the first electrode; a plurality of second electron emitters located on and electrically connected to the second electrode; and a second phosphor layer located on the second electrode. | 02-20-2014 |
| 20140103832 | LED TRAFFIC LAMP CONTROL SYSTEM - A traffic lamp and a method of controlling the traffic lamp based on a power signal are provided. The traffic lamp can include a controller and a light emitting element. When a plurality of light emitting elements is included in the traffic lamp, each light emitting element is coupled with a separate controller. Each controller can be configured to include a predetermined light emitting timing sequence for the corresponding light emitting element. When the power signal is supplied to the traffic lamp, each controller determines a power signal characteristic such as a frequency or a period of the power signal and controls a light output of the light emitting element based on the power signal characteristic and the light emitting timing sequence. A plurality of light emitting elements can be synchronized using the power signal applied to the traffic lamp. | 04-17-2014 |
| 20140117871 | BATTERY-POWERED RETROFIT REMOTE CONTROL DEVICE - A remote control device may be configured to be mounted over the toggle actuator of a light switch and to control a load control device via wireless communication. The remote control device may include a base portion and a rotating portion supported by the base portion so as to be rotatable about the base portion. The remote control device may include a control circuit and a wireless communication circuit. The control circuit may be operably coupled to the rotating portion and to the wireless communication circuit. The control circuit may be configured to translate a force applied to the rotating portion of the remote control device into a control signal and to cause the communication circuit to transmit the control signal to the load control device. | 05-01-2014 |
| 20140132177 | WHITE LIGHT EMITTING DIODE (LED) LIGHTING DEVICE DRIVEN BY PULSE CURRENT - A white LED lighting device driven by a pulse current is provided, which consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %:30-90 wt %. The white LED lighting device drives the LED chips with a pulse current having a frequency of not less than 50 Hz. Because of using the afterglow luminescence materials, the light can be sustained when an excitation light source disappears, thereby eliminating the influence of LED light output fluctuation caused by current variation on the illumination. At the same time, the pulse current can keep the LED chips being at an intermittent work state, so as to overcome the problem of chip heating. | 05-15-2014 |
| 20140167641 | HIGH PRESSURE DISCHARGE LAMP LIGHTING APPARATUS - In a lighting apparatus containing a high pressure discharge lamp, an alternating current supplied to the discharge lamp at the time of steady lighting of the frequency (basic frequency) selected from a range between 60 and 1000 Hz and a low frequency having a frequency selected from a range between 5 and 200 Hz lower than the basic frequency is generated alternately. The frequency of the low frequency wave is changed in response to the change of the lighting voltage of the discharge lamp. The supply period of the basic frequency is increased and decreased little by little by every predetermined time. | 06-19-2014 |
| 20140197756 | LIGHT EMITTING SYSTEM, OPTICAL POWER CONTROL DEVICE, AND CONTROL SIGNAL MODULE - A light emitting system includes a light emitting device having a forward voltage, and an optical power control device. The optical power control device includes a control signal module and a current controller. The control signal module generates a control signal according to the forward voltage, and the current controller permits flow of a driving current through the light emitting device according to the control signal. | 07-17-2014 |
| 20140232287 | DUAL-MODE DIMMING OF A LIGHT - A lighting apparatus includes at least one light emitting device, such as one or more LEDs, detection circuitry coupled to a power input of the lighting apparatus and arranged to detect a characteristic of a modulation of the power input, supervisory circuitry, such as a processor, coupled to the detection circuitry, and a network interface, coupled to the supervisory circuitry, to communicate over a network. The supervisory circuitry is adapted to receive a message that includes brightness information over the network, receive information regarding the characteristic of the modulation of the power input from the detection circuitry, and control a brightness of the at least one light emitting device based on the brightness information and the information regarding the characteristic modulation of the power input. | 08-21-2014 |
| 20140252979 | PULSE-EXCITED MERCURY-FREE LAMP SYSTEM - A pulse-excited mercury-free lamp system, and method of sustaining the emission of light emission from such a lamp, is provided. The system includes a light-transmissive envelope having an inner surface and a phosphor layer coated thereon. A discharge-sustaining gaseous mixture of a noble gas, at a low pressure, and a metal halide, is retained inside the light-transmissive envelope. An electrical system provides a plurality of pulses to the discharge-sustaining gaseous mixture, resulting in a discharge, which causes the lamp system to emit light. The emission of light is maintained by turning the discharge on during a pulse width of each pulse in the plurality of pulses and by turning the discharge off during a remainder of each period in the plurality of pulses. Particularly in systems where the metal halide is indium-based, this maintains an efficient emission of light without the use of mercury. | 09-11-2014 |
| 20140252980 | LOAD CONTROL DEVICE WITH AN ADJUSTABLE CONTROL CURVE - A load control device, such as a dimmer switch, for example, may provide for user adjustment of the shape of a control curve, such as a dimming curve, for example. The load control device may generate a control curve that has a non-linear relationship between a minimum power level, such as a minimum phase angle of a phase-control signal, for example, and a maximum power level, such as a maximum phase angle of the phase-control signal, for example. The load control device switch may have a default control curve, which may have a linear relationship between the minimum power level and the maximum power level. The load control device may provide for the generation of a control curve that includes two or more different slopes from the minimum power level to the maximum power level. | 09-11-2014 |
| 20140265910 | DIGITAL PHASE CONTROLLER FOR TWO-PHASE OPERATION OF A PLASMA REACTOR - Phase angle between opposing electrodes in a plasma reactor is controlled in accordance with a user selected phase angle. Direct digital synthesis of RF waveforms of different phases for the different electrodes is employed. The synthesis is synchronized with a reference clock. The address generator employed for direct digital synthesis is synchronized with an output clock signal that is generated in phase with the reference clock using a phase lock loop. The phase lock loop operates only during a limited initialization period. | 09-18-2014 |
| 20140285106 | Detection Circuit, Power Circuit, and Luminaire - According to one embodiment, a detection circuit including first and second comparators and a determining unit is provided. The first comparator includes a first input terminal for inputting a first detection voltage, a second input terminal for inputting a first threshold voltage, and a first output terminal configured to output a first output signal. The second comparator includes a third input terminal for inputting a second detection voltage, a fourth input terminal for inputting a second threshold voltage higher than the first threshold voltage, and a second output terminal configured to output a second output signal. The determining unit is configured to determine the presence or absence of conduction angle control of an AC voltage and whether the conduction angle control is a phase control system or an opposite phase control system on the basis of a time difference between the first output signal and the second output signal. | 09-25-2014 |
| 20140312800 | DRIVER CIRCUIT FOR LED BACKLIGHT OF LIQUID CRYSTAL DISPLAY DEVICE - A driver circuit driving an LED backlight of a liquid crystal display device includes a determination unit and a drive current output unit that receives a luminance adjustment signal from the determination unit and supplies a drive current to the LED backlight. The determination unit determines whether or not a duty ratio of a PWM signal input from a control circuit satisfies a predetermined value set in advance and outputs a luminance adjustment signal set in advance in a case where the input of the PWM signal does not reach the predetermined value and outputs a luminance adjustment signal corresponding to the PWM signal input from the control circuit in a case where the input of the PWM signal is the predetermined value or more. | 10-23-2014 |
| 20140320038 | Multiple Location Load Control System - A multiple location load control system comprises a main device and remote devices, which do not require neutral connections, but allow for visual and audible feedback at the main device and the remote devices. The main device and the remote devices are adapted to be coupled in series electrical connection between an AC power source and an electrical load, and to be further coupled together via an accessory wiring. The remote devices can be wired on the line side and the load side of the load control system, such that the main device is wired “in the middle” of the load control system. The main device is operable to enable a charging path to allow the remote devices to charge power supplies through the accessory wiring during a first time period of a half-cycle of the AC power source. The main device and the remote devices are operable to communicate with each other via the accessory wiring during a second time period of the half-cycle. | 10-30-2014 |
| 20140375227 | LED DRIVING DEVICE, LED LIGHTING APPARATUS, AND ERROR AMPLIFICATION CIRCUIT - An error amplification circuit amplifies an error voltage between a reference voltage and an output voltage of the LED current sensor. A control circuit controls the DC output power so that the DC output power becomes a predetermined value, by performing on-off control on a switching element based on the output voltage of the error amplification circuit. The error amplification circuit includes an error amplifier, a phase compensation circuit connected between an inverting input terminal and an output terminal of the error amplifier and having a serial circuit of a phase compensation capacitor and a phase compensation resistor, a gain adjustment resistor serially connected at one end to the serial circuit and connected at the other end to the LED current sensor, and a short circuit configured to make the inverting input terminal of the error amplifier grounded for a predetermined period of time after activation. | 12-25-2014 |
| 20150028767 | METHOD FOR GENERATING RADIATION AT RESONANT TRANSITIONS OF METAL ATOMS - The invention relates to methods for generating radiation at resonance transitions of metal atoms in mixtures of inert gases and metal vapors that are excited by an arc electric discharge. The technical effect of the claimed invention is raising the efficacy and service life of radiation sources at metal atom resonance transitions, which are excited by a low-pressure arc discharge. The technical effect is achieved due to that, according to a method for generating radiation at resonance transitions of metal atoms in mixtures of inert gases and metal vapors, which method includes exciting mixtures of inert gases and metal vapors by a high-frequency alternating longitudinal electric discharge, a discharge is excited by essentially rectangular current pulses with an off-duty ratio not more than 2.0 and duration not exceeding the efficient life-time of resonance state of the radiating metal atom. | 01-29-2015 |
| 20150048752 | WIRELESS POWER TRANSFER THROUGH CONDUCTIVE MATERIALS - An electrical component with conductive material(s) that is suitable for use within the electromagnetic field path of a wireless power transfer system. The electronic component includes conductive materials that are sufficiently thin to absorb no more than an acceptable amount of the electromagnetic field, yet thick enough to remain sufficiently conductive to perform the desired electrical function. In embodiments in which the wireless power supply delivers up to 20 watts of power, the conductive materials are not substantially thicker than about 1/10 the skin depth of the material at the anticipated wireless power frequency. The electrical component may be disposed at any location between the wireless power supply transmitter and the remote device receiver. The present invention permits the use of a wide rang of electrical components in the field path, such as a display, a sensor or a component capable of selectively operating as both. | 02-19-2015 |
| 20150305107 | SYSTEMS AND METHODS FOR MINIMIZING POWER DISSIPATION IN A LOW-POWER LAMP COUPLED TO A TRAILING-EDGE DIMMER - A controller may predict an estimated occurrence of a high-resistance state of a dimmer, wherein the high-resistance state occurs when the dimmer begins phase-cutting an alternating current voltage signal. The controller may also be configured to operate in a trailing-edge exposure mode for a period of time wherein the period of time includes a time of the estimated occurrence of the high-resistance state in order to allow the controller to detect the occurrence of the high-resistance state, wherein energy is transferred from an input to a dissipative element during the trailing-edge exposure mode. The controller may further be configured to minimize a time between a beginning of the period of time and the estimated occurrence of the high-resistance state by modifying the period of time based on an estimated charging time of a capacitor of the dimmer. | 10-22-2015 |
| 20150340944 | LIGHT EMITTING DEVICE DRIVER CIRCUIT, CURRENT RIPPLE REJECTER THEREIN, AND CURRENT RIPPLE REJECTION METHOD THEREFOR - The present invention discloses a light emitting device driver circuit, a current ripple rejecter therein, and a current ripple rejection method therefor. The light emitting device driver circuit includes: a power converter circuit, for converting an input voltage carrying an AC component to an output voltage and supplying an output current; and a current ripple rejecter, which is coupled to the power converter circuit, for filtering a ripple of the output current to generate a light emitting device current, and supplying the light emitting device current to a light emitting device circuit. The current ripple rejecter includes: a low-pass-filter circuit, for filtering the ripple of the output current to generate a filtered current; and a current amplification circuit, which is coupled to the low-pass-filter circuit, for amplifying the filtered current to generate an amplified current; wherein the light emitting device current includes the amplified current. | 11-26-2015 |
| 20150380390 | SIMPLE LED PACKAGE SUITABLE FOR CAPACITIVE DRIVING - The invention relates to a LED package ( | 12-31-2015 |
| 20160050729 | DRIVE CIRCUIT FOR ILLUMINATION DEVICE AND ILLUMINATION DEVICE - Various embodiments relate to a drive circuit for an illumination device and an illumination device. The drive circuit includes a first drive module, wherein the first drive module is configured to convert an alternating current signal from a power supply to a constant current drive signal supplied to a light-emitting unit of the illumination device, and wherein the drive circuit further includes a second drive module, and wherein the second drive module is in series connection with the first drive module and the light-emitting unit and is configured to hold a voltage which is applied across the second drive module by the constant current drive signal, and the second drive module further includes a first switch means which is driven by the held voltage to turn on such that a current signal output from the second drive module is a direct current signal. | 02-18-2016 |
| 20160087142 | SEMICONDUCTOR LAYER SEQUENCE AND METHOD FOR OPERATING AN OPTOELECTRONIC COMPONENT - The semiconductor layer sequence includes an n-conductive layer, a p-conductive layer and an active zone located therebetween. The active zone comprises N quantum wells with N≧2. At a first working point (W | 03-24-2016 |
| 20160157332 | NON-THERMAL EQUILIBRIUM PLASMA IGNITION PLUG AND NON-THERMAL EQUILIBRIUM PLASMA IGNITION DEVICE | 06-02-2016 |
| 20160174348 | DEVICE AND METHOD FOR LIGHTING HIGH-PRESSURE DISCHARGE LAMP | 06-16-2016 |
| 20160196958 | FREQUENCY TUNING FOR DUAL LEVEL RADIO FREQUENCY (RF) PULSING | 07-07-2016 |
| 20170238399 | MULTIPLE LOCATION LOAD CONTROL SYSTEM | 08-17-2017 |
| 20220140576 | SPARK PLUG WITH MULTIPLE SPARK GAPS - A spark plug having multiple spark gaps, where at least one of the spark gaps is located within a prechamber. The spark plug may include a first center wire assembly, a second center wire assembly, an insulator, a metallic shell, a first sparking area with a prechamber cap and a ground electrode for a prechamber spark gap, and a second sparking area with a ground electrode for a main chamber spark gap. The spark plug is designed to maximize engine performance and/or operation by utilizing the multiple spark gaps, where the prechamber spark gap may be used for certain operating conditions where such a spark gap is advantageous and the separate main chamber spark gap may be used for other conditions where a main chamber spark gap is advantageous. | 05-05-2022 |
