Class / Patent application number | Description | Number of patent applications / Date published |
315194000 | REGULATION OF THE CONTROL CURRENT AND/OR POTENTIAL APPLIED TO DISCHARGE CONTROL DISCHARGE DEVICE LOADS BY PHASE SHIFTING MEANS | 13 |
20080224624 | Dimmer switch assembly - Disclosed herein is a dimmer switch having a broad range of control with a relatively simple circuit having a number of safety features. The circuit employs a triac and diac to selectively conduct an AC power wave. A variable phase shift network having an improved range of control governs the firing angle of the diac. The variable phase shift network includes a first and second series R-C circuits coupled by a bridge resistor. | 09-18-2008 |
20080258638 | Method and Circuit Arrangement for Operating a High-Pressure Gas Discharge Lamp - A description is given of a method and a circuit arrangement for operating a high-pressure gas discharge lamp with a lamp current superposed with first current pulses, in particular in a system for the time-sequential production of (primary) colors and possibly white segments, from which an image to be displayed is synthesized, in which, in order to change or correct color and/or brightness properties of the image, the first current pulses are adjusted with regard to their amplitude and/or temporal length and/or temporal position relative to the production of the colors and/or white segments. A description is also given of a projection system comprising such a circuit arrangement. | 10-23-2008 |
20080272705 | LIGHT EMITTING DIODE LAMP ASSEMBLY HAVING A VOLTAGE-REGULATING CAPABILITY - The light emitting diode (LED) lamp assembly has an LED light string, a power plug, an AC to DC converter and a voltage-regulating element. The LED light string has multiple LEDs connected in series. The power plug is connected to the LED light string and obtains an AC power from an external AC power source. The AC to DC converter is retained and mounted in the power plug and is connected to the LED light string, wherein the AC to DC converter obtains and converts the AC power into a DC power. The voltage-regulating element is connected between the LED light string and the AC to DC converter in the power plug and has a constant voltage. Therefore, a voltage supplied to the LED light string is obtained by subtracting the constant voltage of the voltage-regulating element from the voltage of the DC power. | 11-06-2008 |
20080278083 | Circuit Arrangement - A ballast circuit receiving power from the mains and supplying a high frequency lamp current to a lamp is equipped with means to generate both a common mode current and a differential mode current through the mains supply terminals. Both these currents are phase shifted 180 degrees with respect to the lamp current. In this way currents induced in the mains supply terminals by means of parasitic capacitive coupling and magnetic coupling between conductors carrying the lamp current and the mains supply terminals are cancelled. | 11-13-2008 |
20090009096 | Current Controlled Driver - Various current controlled driver apparatuses are disclosed herein. For example, some embodiments of the present invention provide a current controlled driver including a control circuit having a current input and a driver circuit having a power input. The control circuit has an output that is directly electrically connected to an input of the driver circuit. The control circuit operates between a positive voltage level and a ground potential. The driver circuit is adapted to operate between a higher positive voltage level and a negative voltage level. | 01-08-2009 |
20090033235 | System & Method for Current and/or Temperature Control of Light Fixtures | 02-05-2009 |
20110204803 | EFFICIENT ELECTRICALLY ISOLATED LIGHT SOURCES - Solid state light sources are compatible with AC phase-cut dimmers. The light sources may have switching mode power supplies having primary and secondary sides that are in first and second circuit parts that are electrically isolated from one another. Information regarding a waveform of input electrical power is extracted in the first circuit part and passed to a controller in the second circuit part by way of a galvanic isolator. Additional isolated paths may be provided to provide bi-directional exchange of information between the first and second circuit parts and/or to provide for the exchange of additional information relevant to control. The signal path from the first side to the second side may have a low latency. | 08-25-2011 |
20120176053 | POWER FACTOR CORRECTION METHOD AND DEVICE FOR DISCHARGE LAMPS, FOR EXAMPLE HIGH PRESSURE SODIUM LAMPS - The present invention relates to a method for driving and to an associated command and control device for discharge lamps ( | 07-12-2012 |
20140091722 | Method and Apparatus for Measuring Operating Characteristics in a Load Control Device - A load control device, such as an electronic ballast, for controlling the power delivered from an AC power source to an electrical load, such as one or more fluorescent lamps, comprises a power converter having an inductor and a power switching device coupled to the inductor, a load control circuit adapted to be coupled to the electrical load, and a control circuit operable to calculate an average input power of the load control device. The control circuit may be operable to calculate a cumulative output power of the power converter while the ballast is preheating filaments of the lamps, and to subsequently determine a fault condition in the lamps in response to the calculated cumulative output power of the power converter. Further, the control circuit may be operable to transmit a digital message including the calculated average input power of the load control device. | 04-03-2014 |
20160135272 | Standby Current Supplier - Provided is a standby current supplier including a bleeding circuit electrically connected to a dimmer and through which a first current flowing to the dimmer flows when the dimmer is in an off state, and a first controller configured to detect a first voltage corresponding to an input voltage generated by the dimmer and control the bleeding circuit based on the first voltage when the first voltage is lower than a predetermined first level. | 05-12-2016 |
315195000 | Plural load device systems | 1 |
315196000 | Inverse parallel connected asymmetric load devices | 1 |
315197000 | Discharge control discharge device in the control circuit | 1 |
20090236996 | DRIVE CIRCUIT FOR DRIVING INDICATORS IN COMPUTER SYSTEM - A circuit is used to indicate different statuses of a component of a computer system. The circuit includes a port, an indicating device, and a control circuit. The port outputs different signals corresponding to different statuses of the component. The indicating device includes a first indicator and a second indicator each of which includes a positive end and a negative end. The positive end of the second indicator is connected to the negative end of the first indicator, and the negative end of the second indicator is connected to the positive end of the first indicator. The control circuit includes an input terminal, and a pair of output terminals connected to opposite ends of the first indicator. A polarity of an electric potential difference between the pair of output terminals is switched between negative and positive polarities according to the signal outputted by the port. | 09-24-2009 |
315199000 | Discharge control discharge device in the control circuit | 2 |
20090261744 | Phase-control dimming electronic ballast system and control method thereof - A phase-control dimming electronic ballast system and the control method thereof, wherein the system includes a phase controller, a converter, an inverter and a system controller. Moreover, the system controller senses a firing angle from the phase controller, and adjusts the output voltage of the converter and the switching frequency of the inverter to achieve the operation of dimming fluorescent lamp. | 10-22-2009 |
20100123404 | LED DRIVER WITH SINGLE INVERTER CIRCUIT WITH ISOLATED MULTI-CHANNEL OUTPUTS - A single-converter circuit-based LED driver circuit ( | 05-20-2010 |