| Entries |
| Document | Title | Date |
|---|
| 20080203937 | Method and a Circuit Arrangement for Operating a High Intensity Discharge Lamp - A method and a circuit arrangement ( | 08-28-2008 |
| 20080231207 | DISCHARGE LAMP LIGHTING APPARATUS AND SEMICONDUCTOR INTEGRATED CIRCUIT - A discharge lamp lighting apparatus includes switching elements to pass a current to a primary winding of a transformer and a capacitor, an oscillator to generate a triangular signal, an error amplifier to amplify an error voltage of a voltage corresponding to a current passed through a discharge lamp and receive a burst dimming signal that is a pulse signal to intermittently supply power to the discharge lamp, comparators to compare the error voltage with the triangular signal and generate PWM control signals that turn on/off the switching elements, respectively, a clamp circuit to clamp an output from the error amplifier so that the output from the error amplifier may not drop below a lower limit value of the triangular signal during an OFF period of the burst dimming signal, and breaking circuits to block the PWM control signals during the OFF period of the burst dimming signal. | 09-25-2008 |
| 20080238333 | Inverter, Backlight Assembly Having the Same and Display Apparatus Having the Same - A display apparatus includes a display panel and a backlight assembly including a lamp and an inverter. The inverter includes a main transformer, a main driver and a voltage controller. The main transformer applies a driving alternating current (AC) voltage to the lamp. The main driver generates an output signal controlling the main transformer based on a feedback signal from the main transformer. The voltage controller is electrically connected to a feedback terminal of the main driver to control a maximum level of a voltage applied to the feedback terminal. | 10-02-2008 |
| 20080246413 | DC/AC COLD CATHODE FLUORESCENT LAMP INVERTER - A DC/AC cold cathode fluorescent lamp (CCFL) inverter circuit includes a transformer with a primary winding and a secondary winding for providing increased voltage to a CCFL, a first and second MOSFET switches for selectively allowing direct current of a first polarity and a second polarity to flow through the transformer respectively. The primary and secondary windings of the transformer are electrically coupled to ground. A capacitor divider is electrically coupled to the CCFL for providing a first voltage signal representing a voltage across the CCFL. A first feedback signal line receives the first voltage signal. A timer circuit is coupled to the first feedback signal line for providing a time-out sequence of a predetermined duration when the first voltage signal exceeds a predetermined threshold. A protection circuit shuts down the first switch and the second switch when the first voltage signal exceeds the predetermined threshold after the predetermined duration. | 10-09-2008 |
| 20080265794 | CURRENT-DRIVEN TOROIDAL-MAGNETIC-CORE-FREE FEEDBACK TYPE BALLAST - A current driven toroid-free feedback type ballast comprising a filter and rectifier circuit, a switch and resonant circuit and a lamp load including capacitors, wherein the filter and rectifier circuit is coupled to input ends of the switch and resonant circuit with its output ends; the switch and resonant circuit is coupled to the lamp load with its output ends and comprising: a trigger circuit comprised of resistors R | 10-30-2008 |
| 20080290812 | Transformer Driver and Transformer Driving Method - A transformer driver capable of making a load current constant with a simple configuration is provided. A driver | 11-27-2008 |
| 20080309250 | Radio Station and Method of Operating a Radio Station - A lamp driver circuit supplies an alternating current having an operating frequency to a lamp, e.g. a fluorescent lamp, for operating the lamp. To switch off the lamp, the frequency of the alternating current is changed to a non-operating frequency. Due to the frequency change, the impedance of an impedance element of the lamp driver circuit is changed. As a result, the lamp current decreases to zero and the lamp extinguishes. According to the invention, the current having the non-operating frequency is employed to generate a voltage to be supplied to a further circuit, such as a control circuit. Thus, the lamp driver circuit and an associated control circuit may operate in an operating mode or in a standby, i.e. non-operating, mode without requiring a separate voltage supply source. In the standby mode, the control circuit may be controlled to switch the lamp driver circuit from the non-operating mode into the operating mode, thereby switching the lamp on. | 12-18-2008 |
| 20090021179 | BACKLIGHT DRIVING SYSTEM FOR LIQUID CRYSTAL DISPLAY - There is provided a backlight driving system for a liquid crystal display that can reduce size and weight of a product because a DC-DC converter is not used when commercial AC power is converted into lamp driving power. A backlight driving system for a liquid crystal display according to an aspect of the invention includes a power supply unit converting commercial alternating current (AC) power into direct current (DC) power having a voltage level set beforehand, an inverter unit converting the DC power from the power supply unit into AC power at a one-to-one conversion ratio set beforehand, a boosting unit boosting the AC power from the inverter unit into lamp lighting power set beforehand; and a lamp group receiving the lamp lighting power from the boosting unit to emit light. | 01-22-2009 |
| 20090039798 | Pulsed igniting device comprising a piezoelectric transformer for a high-pressure discharge lamp - A device for igniting the gas discharge in a high-pressure discharge lamp (La). The igniting device is embodied as a pulsed igniting device (C, FS, Tr | 02-12-2009 |
| 20090051298 | Multiple discharge lamp lighting device - A multiple discharge lamp lighting device in which lamp current of discharge lamps is equalized by using a circuit structure having transformers on both sides of the discharge lamps and in which the number of parts can be reduced. A multiple discharge lamp lighting device | 02-26-2009 |
| 20090058313 | POWER SUPPLY FOR SUPPLYING POWER TO A LAMP - A power supply for supplying power to a lamp with functions of dimming, over-current protection, over-voltage protection, arcing protection, and low-temperature start-up is provided. When frequency of the output current exceeds a predetermined value, the power supply is turned off to accomplish a dimming goal and extend lifetime of the lamp. When abnormal statuses such as open-circuited status, short-circuited status, or arcing status occur, a surge current induced by the abnormal statuses may be eliminated to prevent the power supply from being damaged. A high-frequency current detection circuit is configured to detect whether a current supplied to the high-voltage load is a high-frequency current to prevent damage to the electronic elements in the high-voltage load. A current adjusting circuit is configured to adjust an alternating current outputted to a lamp set in response to an environment temperature to supply an adequate alternating current at a low temperature for starting the lamp set. | 03-05-2009 |
| 20090079356 | AC/DC LAMP HOLDER - An AC/CD lamp holder includes a first lamp base having a first end adapted to electrically connect to an AC power source; and an AC/DC transformer having an AC side electrically connected to a second end of the first lamp base opposite to the first end thereof, and a DC side provided with at least one coupling section for electrically connecting with positive and negative electrodes of a DC lighting device. The AC/DC transformer and the first lamp base are formed into one integral body. A DC lighting device can be directly connected to the coupling section of the AC/DC lamp holder to obtain power from a conventional AC power source and provide the illuminating effect. A user needs not to change the whole power supply system or externally connect an AC/DC transformer to the AC power source to thereby save the cost for changing the power supply system. | 03-26-2009 |
| 20090096383 | Inverter and Liquid Crystal Display Device Including the Same - Disclosed is a liquid crystal display panel which includes a switching circuit for converting an input voltage into an alternating current (AC) voltage, a transformer for boosting the AC voltage generated from the switching circuit, and a bypass capacitor part connected in parallel between an output terminal of the switching circuit and the transformer. | 04-16-2009 |
| 20090115342 | Lighting System for Illumination Using Cold Cathode Fluorescent Lamps - A lighting system for illuminating a chamber in a building includes a lighting fixture suitable for being mounted onto a surface of the chamber, so that light emitted by at least one CCFL device mechanically supported by the fixture illuminates the chamber. The one CCFL device includes at least one transformer. A driver adapted to be connected to a surface of the chamber is capable of converting input power from a power source to an AC power having a voltage in the range of about 5-400 volts and a current at a frequency in the range of about 1 kc-100 kc. The at least one transformer is suitable for converting the AC power to an output power suitable for operating the at least one CCFL, causing the at least one CCFL to emit light. Physically separating the driver from the at least one CCFL device reduces the adverse effects of heat generated by the at least one CCFL device on the driver and increasing the useful life of the CCFL lighting system. A controller may be used to control light emitted substantially simultaneously by a plurality of the above lighting systems, such as for large commercial or public area illumination, by sending signals to the drivers to control the amount of power that is supplied to the CCFLs. Different power may be separately supplied to CCFLs having different phosphors in each of a plurality of CCFL devices in a plurality of the lighting systems, to adjust substantially simultaneously the color temperature of light emitted by the lighting systems. | 05-07-2009 |
| 20090140662 | Circuit Arrangement Having a Transformation Apparatus and Operating Method for a Lamp Using a Circuit Arrangement Having a Transformation Apparatus - The present invention relates to a circuit arrangement having a transformation apparatus, which has a primary side (P) and a secondary side (S), wherein the primary side and the secondary side (S) are DC-isolated from one another, wherein the primary side (P) has a terminal for a supply voltage (UE) and is connected to a first reference potential, wherein the secondary side (S) comprises a first and a second output line, which, in the normal case, are not coupled to a reference potential and which form an output terminal, at which a voltage for a load (LA) can be provided, wherein it furthermore comprises: an apparatus for tapping off a measured voltage potential (CP) on the secondary side (S); and an apparatus (10) for determining whether the measured voltage potential is in a permissible range. The invention moreover relates to an operating method for a lamp using a circuit arrangement. | 06-04-2009 |
| 20090153069 | Module for parallel lighting and balancer coil for discharge lamp - A small balancer coil for cold-cathode florescent lamps having sufficient shunt/balance effects, comprises a discharge lamp, a conductor located close to the discharge lamp, and two coils whose magnetic fluxes face each other. The magnetic fluxes generated in the coils face and cancel each other. Lamp currents of the discharge lamps are balanced by making the sum of the reactances of the mutual inductance of the balancer coil larger than the negative resistance of the discharge lamp. Section winding is applied to each coil of the balancer coil so as to maintain shunt and balance effects even in a small/flat balancer coil by making self-resonance frequency of each of the coils higher. | 06-18-2009 |
| 20090160352 | DISCHARGE TUBE LIGHTING APPARATUS - A discharge tube lighting apparatus includes a converter that converts a voltage received from an alternating-current or direct-current power supply into a predetermined direct-current voltage and an inverter that converts an output voltage of the converter into an alternating-current voltage having a predetermined frequency. The inverter performs burst control based on an externally input dimming signal. The converter operates regardless of the active or inactive period of the burst control of the inverter and performs negative feedback control in response to a detection signal of a tube current in the active period of the inverter. | 06-25-2009 |
| 20090174339 | High-efficiency single-ended forward-flyback electronic driver for barrier discharge lamps - An electronic circuit topology ( | 07-09-2009 |
| 20090184654 | INVERTER - Primary and secondary regions are electrically insulated from each other. The first and second pulse transformers are provided to the respective transistors in the switching circuit. Secondary windings of the first and second pulse transformers are connected to control terminals of the transistors. The control circuit supplies switching voltages to primary windings of the pulse transformers based on a feedback signal fed back through a feedback line. A primary winding of a transformer, the switching circuit, and the secondary windings are disposed on the primary region. A secondary winding of the transformer, the primary windings, the feedback line, and the control circuit are disposed on the secondary region. | 07-23-2009 |
| 20090189535 | Transformer wiring method and apparatus for fluorescent lighting - A transformer wiring method and apparatus for fluorescent lighting are described. The fluorescent lighting apparatus includes a transformer and a ballast. An installer is easily able to balance the system load because each fluorescent lighting apparatus includes its own transformer and may be connected directly to a facility's three phase power distribution while still operating at rated voltages. Moreover, the ballast is protected from surges and stray voltages thereby reducing the frequency of ballast failures. | 07-30-2009 |
| 20090189536 | HIGH EFFICIENCY AND LOW COST COLD CATHODE FLUORESCENT LAMP DRIVING APPARATUS FOR LCD BACKLIGHT - The invention is a driving apparatus and circuit for efficiently converting a direct current (DC) signal into an alternating current (AC) signal to drive a fluorescent lamp. A semi class E configuration which utilizes only one transistor is employed in the invention. The invention comprises a power transistor, a transformer wherein a primary winding is used as a load for the power transistor and a secondary winding is used to transfer energy to the load for the driving apparatus, i.e. the CCFL tube, and control means which extracts the frequency and current of the power transistor and corrects the deviation between the frequency of the power transistor and that of the control means. | 07-30-2009 |
| 20090195172 | INVERTER WITH ADJUSTABLE RESONANCE GAIN - The present invention includes a PWM unit, a switch unit, a resonance unit, a transformer, a feedback unit and a frequency control unit, wherein the switch unit obtains a DC power from a power source, the PWM unit produces a working cycle signal to drive the switch unit to convert the DC power into a pulse power and the resonance unit converts the pulse power into a driving power for providing to the transformer to convert thereof into an output power, characterized in that when the resonance unit is under a starting frequency and a working frequency higher than the starting voltage, a starting voltage gain and a working voltage gain respectively corresponding thereto are produced, wherein the starting voltage gain is larger than the working voltage gain, so that the larger starting voltage gain can produce the output power with higher voltage to smoothly initiate the lamp tube set. | 08-06-2009 |
| 20090243505 | FREQUENCY SYNCHRONIZING METHOD FOR DISCHARGE TUBE LIGHTING APPARATUS, DISCHARGE TUBE LIGHTING APPARATUS, AND SEMICONDUCTOR INTEGRATED CIRCUIT - (1) An oscillator generates a triangular wave signal whose inclination for charging a capacitor and inclination for discharging the same are the same and which is used to turn on/off FETs Qp | 10-01-2009 |
| 20090251061 | Apparatus for Operating at Least One Discharge Lamp - The invention relates to an apparatus for operating at least one discharge lamp by means of one or more voltage converters, wherein the apparatus comprises a voltage converter which is in the form of an inverse Watkins-Johnson converter. | 10-08-2009 |
| 20090251062 | INVERTER - A soft start circuit generates a soft start voltage which changes over time when light emission of an EEFL is started. A pulse modulator receives a feedback voltage that corresponds to the output voltage of an inverter and the soft start voltage, and adjusts the duty ratio of a pulse signal PWM such that these two voltages match one another using a feedback operation. A striking control circuit monitors an error signal which is asserted when an abnormal state occurs. In a case in which the error signal has been asserted at a detection timing after the soft start voltage has reached a target voltage, the striking control circuit resets and restarts the soft start circuit. A driver controls the switching of the voltage at the primary coil of a transformer according to the pulse signal received from the pulse modulator. | 10-08-2009 |
| 20090256490 | VOLTAGE SENSING CIRCUITS AND METHODS FOR INVERTERS - A voltage sensing circuit includes a voltage divider and a voltage rectifier. The voltage divider divides a first output voltage on a first output voltage line to a first divided output voltage. The voltage divider comprises a first metal foil and a first capacitor. The first metal foil and the first output voltage line can form a first capacitive component. The first capacitive component is coupled in series with the first capacitor. The first capacitive component and the first capacitor can generate the first divided output voltage. The voltage rectifier is coupled to the voltage divider and can rectify the first divided output voltage to a sensing voltage indicative of the first output voltage. | 10-15-2009 |
| 20090295304 | Ballast with multilead wires - A ballast with multilateral lead wires is provided for supplying a power for fluorescent lamps. The ballast comprises a lid and a longitudinal container for containing a ballast circuit for processing an input power and generating a lamp power supply to one or more of the lamps. The circuit includes an input connector mounted on an edge of the circuit for receiving input power wires and an output connector mounted on the opposite edge of the circuit from the input connector for connecting one or more sets of output lead wires. The lid is tightly fastened over the container and has two opposite edgewise basins with access openings for the wires to the input and output connectors. | 12-03-2009 |
| 20090309509 | Power supply for a hot-filament cathode - In accordance with one embodiment of the present invention, there is provided a switch-mode power supply to generate the heating current for a hot-filament electron-emitting cathode. The power supply directly couples, without an output power transformer, the output from a full-bridge converter that operates at an output frequency in the range from ten Hz to tens of Khz to the output terminals of the power supply. A connection to a reference potential that minimizes the potential fluctuation of the cathode is provided by the center tap on an autotransformer connected across the output terminals, where the conductors in the autotransformer are sized for half of the emission current from the cathode rather than the much larger heating current. | 12-17-2009 |
| 20090315472 | BACKLIGHT MODULE - A backlight module positioned on a printed circuit board (PCB) includes a power control circuit, a transformer, and a voltage detection component. The power control circuit outputs power signals. The transformer has a primary winding and at least one secondary winding. The primary winding is connected to the power control circuit and receives the power signals. The voltage detection component is positioned on a high voltage terminal of the secondary winding of the transformer, detecting voltage variations in the high voltage terminal of the secondary winding of the transformer, and outputting the detected voltage variation to the power control circuit. The power control circuit adjusts the output power signals according to the detected voltage variation. | 12-24-2009 |
| 20100001655 | Inverter Circuit and Lamp Control Apparatus Having the Same - Disclosed is an inverter circuit. The inverter circuit comprises a transformer comprising a primary coil and a secondary coil wound at a predetermined turn ratio, a first switch circuit comprising first and second switch devices commonly connected with a first end of the primary coil of the transformer, a second switch circuit comprising third and fourth switch devices commonly connected with a second end of the primary coil of the transformer, and a third switch circuit comprising fifth and sixth switch devices commonly connected with a part of the primary coil of the transformer. | 01-07-2010 |
| 20100033104 | CIRCUIT CONFIGURATION FOR STARTING AND OPERATING AT LEAST ONE DISCHARGE LAMP - A circuit arrangement for starting and operating at least one discharge lamp is provided. | 02-11-2010 |
| 20100045199 | IGNITION TRANSFORMER FOR A DISCHARGE LAMP - An ignition transformer for a discharge lamp is provided having a transformer core whose material and dimensions are selected in such a manner that the Curie temperature of the material after the ignition which is achieved by means of the ignition transformer can be achieved by a voltage drop across a secondary winding of the ignition transformer. | 02-25-2010 |
| 20100045200 | Lamp drive circuit - A lamp drive circuit used for driving a number of lamps is provided. The lamps are used in the backlight module. The backlight module is used for providing a light source during a liquid crystal display displays. The lamps are respectively electrically connected to a coil is. The coils substantially have the same coil turns and have the same magnetic circuit, so that the currents flowing through the lamps are balanced. | 02-25-2010 |
| 20100090611 | FULL-BRIDGE AND HALF-BRIDGE COMPATIBLE DRIVER TIMING SCHEDULE FOR DIRECT DRIVE BACKLIGHT SYSTEM - A driver circuit or controller flexibly drives either a half-bridge or a full-bridge switching network in a backlight inverter without modification, redundant circuitry or additional components. The driver circuit includes four outputs to provide four respective driving signals that establish a periodic timing sequence using a zero-voltage switching technique for semiconductor switches in the switching network. | 04-15-2010 |
| 20100134036 | TRANSFORMER AND BACKLIGHT APPARATUS - The invention discloses a transformer and a backlight apparatus. The backlight apparatus includes a power module, a lamp and a transformer. The transformer includes a bobbin, a primary winding, a secondary winding, a first conductive plate and a second conductive plate. The bobbin has a high-voltage winding region and a pin. The primary winding is coupled to the power module. The secondary winding is wound on the high-voltage winding region and one end of the secondary winding is electrically connected to the pin, which is further coupled to the lamp of the backlight apparatus. A separation plate is disposed on the high-voltage winding region. The first conductive plate is disposed in the separation plate and electrically connected to the pin. The second conductive plate is disposed in the separation plate and located corresponding to the first conductive plate. Accordingly, the first conductive plate and the second conductive plate form a capacitor. | 06-03-2010 |
| 20100141166 | DISCHARGE ELEMENT WITH DISCHARGE-CONTROL ELECTRODE AND THE CONTROL CIRCUIT THEREOF - The present invention relates to a new discharge element having a discharge-control electrode for inducing a discharge even at low voltage by improving a characteristic in which a discharge element may not be discharged against a fast transient voltage when it is at low voltage, and more specifically, the discharge element having a discharge-control electrode according to the present invention comprises an airtight cylinder formed with a ceramic insulation material, a pair of discharge electrodes arranged for facing an end opening of the airtight cylinder, a discharge gap formed between the pair of discharge electrodes, a discharge-assisting material filled inside the airtight cylinder, and a discharge-control electrode in contact with the airtight cylinder and physically separated from the discharge-assisting material, wherein a discharge between the pair of discharge electrodes is induced by a control voltage applied through the discharge-control electrode. | 06-10-2010 |
| 20100176739 | DISCHARGE LAMP OPERATING DEVICE, ILLUMINATION DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE - A series circuit comprising a diode and a resistance is connected in parallel to a filament, and a series circuit comprising a diode and a resistance is connected in parallel to a filament. The filaments are preheated by a preheating current supplied from secondary windings of a preheating transformer, via preheating capacitors. Detection circuits detect DC voltage components of the preheating capacitors. Comparators compare the DC voltage components of the preheating capacitors with a reference voltage. The comparators cause a control circuit to protect the inverter circuit if an abnormality of the filaments is detected. | 07-15-2010 |
| 20100188011 | PIEZOELECTRIC TRANSFORMER DRIVING DEVICE, COLD-CATHODE TUBE INVERTER, COLD-CATHODE TUBE DRIVING DEVICE, AND IMAGE FORMING APPARATUS - A piezoelectric transformer driving device including: an oscillator; a frequency-divider outputting a pulse by dividing a clock signal from the oscillator by a frequency-divide ratio received thereto; a switching element driven by the pulse and intermittently applying a voltage to a primary side of a piezoelectric transformer; a frequency-divide ratio instructing unit holding a frequency-divide ratio instruction value of a real number having an integer part and an fractional part; a binarization unit binarizing the frequency-divide ratio instruction value into two different integer frequency-divide ratios and selectively outputting the frequency-divide ratios. The binarization unit adjusts an appearance ratio of the frequency-divide ratios such that an average of the frequency-divide ratios output from the binarization unit is equal to an average of the frequency-divide ratio instruction value. | 07-29-2010 |
| 20100207537 | COMPLEX FLUORESCENT LAMP - A complex fluorescent lamp is provided. The complex fluorescent lamp comprises at least one cold cathode fluorescent lamp (CCFL) and an impedance transformer. Each of the CCFL has a first electrode and a second electrode. The impedance transformer is coupled to the first electrode and the second electrode for transforming an AC signal into a high voltage signal to light up the at least one CCFL. | 08-19-2010 |
| 20100213863 | Discharge Lamp Lighting Device - To provide a discharge lamp lighting device in which the initial state of discharge in a wiring of a circuit on the secondary side of a transformer in the discharge lamp lighting device is accurately detected and the operation thereof stops and which can be applied to a large-scaled liquid crystal display device. The discharge lamp lighting device according to the present invention includes a transformer | 08-26-2010 |
| 20100213864 | CHANGING POWER INPUT TO A GAS DISCHARGE LAMP - The present disclosure thus provides a technique for providing multi-level operation of ballast circuitry for discharge lamps. In one version, an auxiliary capacitance is switched in and out of circuit by a user controlled switch for lower the frequency of the voltage from the inverter to the transformer resulting in lower power output to the lamps. In another version, the auxiliary capacitance may be switched in and out of circuit by a user operated switch wherein the capacitance is connected to the secondary or output winding of the transformer for selectively reducing power to the lamps for reduced illumination. In other versions, auxiliary inductances are selectively switched in and out of circuit to alter the frequency of the primary voltage to the transformer. In another version, an auxiliary winding is selectively switched in and out of the secondary of the transformer for providing normal and reduced level power to the lamps. In another version, a variable direct current power supply is provided to the coupled inductors of the ballast circuitry for user control of the power supply to the ballast circuitry. | 08-26-2010 |
| 20100225242 | GAS-DISCHARGE LAMP AND METHOD OF MANUFACTURING A GAS-DISCHARGE LAMP - A gas-discharge lamp ( | 09-09-2010 |
| 20100231136 | LINE VOLTAGE DIMMABLE CONSTANT CURRENT LED DRIVER - A programmable LED constant current driver circuit for driving LEDs at constant current and dimming the LEDs using standard, off-the-shelf dimmers is provided. The current driver circuit of the present disclosure includes a temperature compensation feature which controls the on time for the LEDs based on a measured temperature of the current driver and associated circuits. In another embodiment, the current driver circuit is designed to receive a 24 VAC input and drive one or more LEDs in a transformer-based system dimming system. | 09-16-2010 |
| 20100253238 | High-Frequency Lamp and Method for the Operation Thereof - A high-frequency lamp ( | 10-07-2010 |
| 20110018458 | LIGHTING DEVICE IMPLEMENTED THROUGH UTILIZING INSULATING TYPE PIEZOELECTRIC TRANSFORMER IN DRIVING LIGHT-EMITTING-DIODES (LEDS) - A lighting device implemented through utilizing an insulating type piezoelectric transformer in driving light-emitting-diodes (LEDs), comprising at least said insulating type piezoelectric transformer connected to an LED module, a primary side of said insulating type piezoelectric transformer is used to receive a pulse voltage, and that is converted into an AC voltage in a piezoelectric voltage transformation way, and said AC voltage is output from a secondary side of said insulating type piezoelectric transformer to said LED module in proceeding with lighting function. Due to its various advantages of small leakage current, good insulation capability, high voltage endurance, low operation temperature, compact size, thin profile, high energy conversion efficiency, said insulating type piezoelectric transformer can be used to not only raise lighting efficiency, but also reduce overall size of said lighting device. | 01-27-2011 |
| 20110037405 | TRANSFORMER, POWER CONVERTER, LIGHTING DEVICE, LIGHTING DEVICE FOR VEHICLE, AND VEHICLE USING THE SAME - A transformer in this invention comprises substrates constructing a primary winding, substrates constructing the secondary winding, and a core member disposed around the substrates. The substrates defining the primary winding are provided with insertion holes for passing a middle leg portion of the core member, and patterned conductors having one turn. The transformer further comprises an interlayer connection member. The interlayer connection member is located inwardly of the patterned conductors of the substrates defining the primary winding. The interlayer connection member is located on the same side of the patterned conductors defining the primary winding. The interlayer connection member is configured to establish the electrical connection of the patterned conductors defining the primary winding. | 02-17-2011 |
| 20110037406 | HIGH PRESSURE DISCHARGE LAMP LIGHTING APPARATUS AND LIGHTING FIXTURE - The high pressure discharge lamp lighting apparatus ( | 02-17-2011 |
| 20110062881 | LIGHTING DEVICE AND PROJECTOR - A lighting device which supplies power to an electrode of a discharge lamp to turn on the discharge lamp includes: a pulse generating circuit which produces a high-voltage pulse and applies the high-voltage pulse to the electrode; wherein the pulse generating circuit includes an inductor whose output end is connected with the electrode, and a capacitor connected with the output end of the inductor to produce free oscillation of current applied to the electrode in cooperation with the inductor. | 03-17-2011 |
| 20110101882 | Method For Transmitting Control Information From A Control Device To A Lamp Unit As Well As A Corresponding Illuminating System, Lamp Unit And Control Device - A method is provided for driving at least one lamp unit, which is connected to an AC voltage power supply system. The method comprises modulating a control information item for the operation of the lamp unit onto the supplied AC voltage, decoding of the modulation received on the lamp unit side for reading the control information item and driving the light-emitting device in accordance with the control information item. Provision is made for a shunt to be produced in the line used for transmitting the control information item prior to or at the beginning of the modulation of the control information item. The disclosure also provides a lamp unit and a control device for implementing the method. The disclosure also provides a lighting system. | 05-05-2011 |
| 20110115398 | STARTING DEVICE WITH TWO INPUT POLES - In order to reduce the amount of wiring complexity involved in conventional starting devices for gas discharge lamps, the invention proposes a starting circuit arrangement in which the lamp, in order to provide an AC supply voltage (UN), is assigned a supply circuit, which has at least one inductor, which is arranged in series with the gas discharge lamp, and wherein the starting circuit arrangement comprises: a starting transformer, which is connected on the primary side to a starting triggering circuit and can be connected on the secondary side to the lamp for the transmission of a starting pulse; an input energy source for the starting triggering circuit; a first switch means in the starting triggering circuit; an electronic control device which drives the first switch means. The starting circuit arrangement according to the invention is characterized by the fact that it has, on the supply side, an input terminal which can be connected in the supply circuit of the lamp between the inductor and the lamp, and a means is provided for reproducing the phase profile of an AC supply variable of the lamp after starting of the lamp, in particular in order to determine a zero crossing of the AC supply variable of the lamp after starting of the lamp. The invention also relates to a method for operating a starting circuit arrangement. | 05-19-2011 |
| 20110204812 | TRANSFORMER AND LIQUID CRYSTAL DISPLAY APPARATUS HAVING THE SAME - A transformer and a liquid crystal display apparatus having the transformer are provided. The transformer includes a bobbin having at least one first winding section, at least one second winding section, and at least one core insertion groove formed therein. The transformer also includes at least one coil wound around the first winding section and the second winding section with at least one core inserted into the core insertion groove. | 08-25-2011 |
| 20110210681 | ILLUMINANT OPERATING APPLIANCE WITH POTENTIAL SEPARATION - An operating device for operation of at least one illuminant, such as one or more LEDs, includes first and second converters and first and second logic circuits. The first converter is supplied directly or indirectly with mains voltage, with a first reference potential. The second converter is galvanically isolated from the first converter, with a second reference potential for supplying a load circuit with the illuminant. The first logic circuit is for controlling the first converter, and the second logic circuit is for controlling the second converter. The first logic circuit and the second logic circuit are connected to one another, with potential isolation, via an interface. | 09-01-2011 |
| 20120001564 | Illumination systems - An illumination system includes a master power supply providing power to several illumination modules. The master power supply is constructed and arranged to generate high-frequency and low-voltage electrical power provided to a primary wire forming a current loop. Each illumination module includes an electromagnetic coupling element and several light sources. The electromagnetic coupling element includes a magnetic core arranged to receive the current loop in a removable arrangement, and a secondary wire wound around the magnetic core to enable inductive coupling. The secondary wire is connected to provide current to the light sources that may be arranged in the illumination module as a DC load or an AC load. | 01-05-2012 |
| 20120062140 | Method For Transmitting Control Information From A Control Device To A Lamp Unit As Well As A Corresponding Illuminating System, Lamp Unit And Control Device - A method is provided for driving at least one lamp unit, which is connected to an AC voltage power supply system. The method comprises modulating a control information item for the operation of the lamp unit onto the supplied AC voltage, decoding of the modulation received on the lamp unit side for reading the control information item and driving the light-emitting device in accordance with the control information item. Provision is made for a shunt to be produced in the line used for transmitting the control information item prior to or at the beginning of the modulation of the control information item. The disclosure also provides a lamp unit and a control device for implementing the method. The disclosure also provides a lighting system. | 03-15-2012 |
| 20120104963 | LIGHT SOURCE APPARATUS AND LIGHT SOURCE ADJUSTING MODULE - A light source apparatus and a light source adjusting module are provided. The light source apparatus includes a power supply, a phase modulator, an electrical transformer, a light source adjusting module and a light-emitting device. The power supply provides a first AC voltage signal. The phase modulator receives the first AC voltage signal and adjusts a conducting phase of the first AC voltage signal to generate a modulated AC voltage signal. The electrical transformer transforms the modulated AC voltage signal to generate a second AC voltage signal. The light adjusting module generates a luminance adjusting signal according to a state of the second AC voltage signal. The light-emitting device receives the luminance adjusting signal to generate a corresponding light source. | 05-03-2012 |
| 20120169246 | ILLUMINATION DEVICE - An illumination device ( | 07-05-2012 |
| 20120217895 | LAMP TUBE DRIVING DEVICE, LAMP TUBE MODULE, AND LAMP TUBE DRIVING SYSTEM - Disclosed is a lamp-tube driving device including a controller, an oscillating circuit, a converter, and a protective circuit. Connection relations there-between include the oscillating circuit coupled to the controller, the converter coupled to the controller and CCFL, and the protective circuit coupled to the CCFL and oscillating circuit. The controller is activated in response to first input voltage, and configured to output a control signal in response to second input voltage. The oscillating circuit is able to adjust oscillating frequency of operation clock for the controller. The converter is controlled with the control signal, and configured to convert third input voltage into an output voltage. This output voltage is for driving the CCFL. The protective circuit disables the oscillating circuit when the CCFL remains at a state such as open circuit or short circuit. A lamp-tube module and a lamp-tube driving system for the lamp-tube driving device are further disclosed. | 08-30-2012 |
| 20120268030 | LED DRIVER HAVING CONSTANT INPUT CURRENT - Power consumed by an LED driver may be reduced by drawing, from an electronic transformer or dimmer, an input current that is constant over a plurality of input voltages. Power derived from the constant input current is provided to the LED driver. | 10-25-2012 |
| 20130043806 | Driver circuit particularly suited for lighting devices - Disclosed are various embodiments of driver circuits that operate to excite devices for light emissions therefrom regardless of the impedance ratings thereof. The driver circuits are particularly suited to service both low impedance light emitting diode lighting devices and high impedance halogen lamps. | 02-21-2013 |
| 20140001976 | COIL COMPONENT AND DISPLAY DEVICE INCLUDING THE SAME | 01-02-2014 |
| 20160105941 | LOAD DRIVING APPARATUS WITH WIDE VOLTAGE INPUT - A load driving apparatus is provided, which includes: a DC high voltage generation circuit, configured to selectively receive one of first and second AC input voltages different to each other, and process the received AC input voltage to obtain and provide a DC high voltage, wherein the DC high voltage obtained by processing either the first or second AC input voltages is substantially or approximately the same; a switching circuit, configured to selectively output the DC high voltage or a ground potential in response to two complementary PWM signals, so as to provide an AC signal; a transformer, having a primary side receiving the AC signal from the switching circuit, and a secondary side providing a driving signal to drive a light-emitting load in response to the AC signal; and a control circuit, configured to generate the two complementary PWM signals to control switching of the switching circuit. | 04-14-2016 |
| 20160165685 | Illumination systems - An illumination system includes a master power supply providing power to several illumination modules. The master power supply is constructed and arranged to generate high-frequency and low-voltage electrical power provided to a primary wire forming a current loop. Each illumination module includes an electromagnetic coupling element and several light sources. | 06-09-2016 |
| 20160380550 | Power Supply of transformer and light string therewith - A power supply of a transformer outputs alternating current (AC) and direct current (DC) and contains: a housing and a lid for covering a first end of the housing. An input interface is formed on a second end of the housing, and the lid includes a DC output interface and an AC output interface. A light string contains a power supply of a transformer and a light emitting unit, the power supply outputs alternating currents (AC) and direct currents (DC), and the power supply contains: a housing and a lid for covering a first end of the housing. An input interface is formed on a second end of the housing, the lid includes a DC output interface and an AC output interface, and the DC output interface couples with a DC output connector, and the DC output connector connects with plural bulbs of the light string. | 12-29-2016 |
| 20180023769 | LIGHTING DEVICE COMPRISING A DRIVER UNIT AND METHOD OF MANUFACTURING THE SAME | 01-25-2018 |
