Class 315/195 - Plural load device systems

Subclass of Class 315 - Electric lamp and discharge devices: systems
Definition: Systems, wherein the system includes two or more discharge
No. of patents: 29
Last issue date: 05/13/2008

Number	Title	Issue Date
7372214	Apparatus and method for driving lamp of liquid crystal display device A lamp driving apparatus of a liquid crystal display includes a plurality of lamps arranged with a predetermined distance between adjacent lamps; a comparator to compare output voltages of lamps that are separated by more than the lamp distance; and a power intercep...	05/13/2008
7321199	Display apparatus and control method thereof A display apparatus and method in which a current ripple is decreased to improve characteristics of a display apparatus are provided. A display apparatus comprises a light source, a plurality of driving power units providing driving electric powers to the light sour...	01/22/2008
7315132	Apparatus for driving lamp of liquid crystal display device The present invention relates to a lamp driving apparatus of a liquid crystal display capable of simplifying a structure of the liquid crystal display and in addition preventing a leakage current of the lamp driving apparatus. The lamp driving apparatus of the liqui...	01/01/2008
7291991	Matrix inverter for driving multiple discharge lamps Methods and apparatus are disclosed for converting DC power to AC and for driving multiple discharge lamps and, more particularly, Cold Cathode Fluorescent Lamps (CCFLs), External Electrode Fluorescent Lamps (EEFLs), and Flat Fluorescent Lamps (FFLs). Disclosed meth...	11/06/2007
7283896	TFT display with low loss construction of power supply This present invention relates to a TFT display with low loss construction of power supply to be used in a monitor. The invention includes two independent transformer rectifier circuits, thus when the monitor is in its power-saving mode, it requires only one transfo...	10/16/2007
7271550	Dimmer circuit arrangement A dimmer circuit arrangement is disclosed including a second control circuit (40) for controlling the operation of a triac (50) for delivering current to a load (60), and a first control circuit (10) for controlling the operation of an IG...	09/18/2007
7268500	Control device for multiple lamp currents of liquid crystal display backlight source A control device for multiple lamp currents of a liquid crystal display (LCD) backlight source, comprising an electronic power switch, a transformer, an inverter and an integrated circuit (IC) feedback control module. The transformer has a primary side connected to ...	09/11/2007
7234839	Lighting device for festival decoration A lighting device for festival decoration comprises a plurality of decorative lamp blocks wired in series successively, each block having a two-row lamp fixture; a lamplight controller and a knob switch for regulating lamplights electrically coupled with the wired d...	06/26/2007
7183726	Cold cathode fluorescent lamp drive apparatus and method A cold cathode fluorescent lamp drive apparatus for lighting a cold cathode fluorescent lamp is disclosed. The cold cathode fluorescent lamp drive apparatus includes an abnormal current holding unit that is configured to hold an abnormal current that flows in the co...	02/27/2007
7098611	Dimming control system with distributed command processing A dimming control system includes dimmer modules that receive dimming level information from one of at least two control modules. Each dimmer module includes a microprocessor that provides internal intelligence for controlling power to a load in response to dimming ...	08/29/2006
6979957	Apparatus for driving lamp of liquid crystal display device The present invention relates to a lamp driving apparatus of a liquid crystal display capable of simplifying a structure of the liquid crystal display and in addition preventing a leakage current of the lamp driving apparatus. The lamp driving apparatus of the liqui...	12/27/2005
6559606	Lamp driving topology A lamp driving system that includes a first impedance and a second impedance coupled to the secondary side of a transformer, where the second impedance has a phase shifted value compared to the first impedance. Two lamp loads are connected in series toget...	05/06/2003
5808417	Lighting control system with corrugated heat sink A dimmer panel for controlling the intensity of a plurality of electric light sources includes a plurality of dimming circuits. Each dimming circuit has a control circuit, a heat producing controllably conductive power switch such as a triac, and a heat p...	09/15/1998
5371444	Electronic ballast power supply for gas discharge lamp including booster start circuit responsive to power up condition A kickstart system and method for operating gas discharge lamps is disclosed wherein the amplitude and frequency of the starting voltage are raised for a predetermined period of time to ionize the gas within the lamp and thereafter reduced to steady state...	12/06/1994
5352958	Lighting control system dimmer module with plug-in electrical contacts A plug-in dimmer module for providing controlled power to one or more lighting fixtures or groups of fixtures. The dimmer module includes a housing with one or more circuit breakers located at one end, a power device with one or more dimmer circuits locat...	10/04/1994
5323088	Dimming control circuit A dimming control circuit for a plurality of lighting fixtures includes a separate semiconductor power switch, e.g., a silicon-controlled rectifier or SCR, for providing controlled amounts of pulsed, unidirectional electrical current to each lighting fixt...	06/21/1994
4785390	Instantaneous failure compensation circuit A compensation circuit includes a circuit for monitoring the current delivered to a load and for producing a switching signal whenever a current spike is detected. A control signal representative of the desired voltage across the load is produced. A power...	11/15/1988
4568857	Fluorescent light controller A dimming system for fluorescent tubes wherein counter electromotive forces generated during switch off of the tubes are used to maintain filaments of the fluorescent tubes heated during switch off periods of the tube, the dimming system having source ter...	02/04/1986
4523130	Four lamp modular lighting control The invention is directed to a circuit and a method for efficiently controlling the output illumination level of a gas discharge lighting arrangement having four or more gas discharge lamps with multiple ballasts. Load side control of each ballast is prov...	06/11/1985
4494010	Programmable power control apparatus responsive to load variations An apparatus especially adapted for use in AC power systems of the type having a device for reducing power consumption by reducing load voltage, the apparatus having a sensor for detecting an increase in load current and for controlling a responsive incre...	01/15/1985
4492896	Electronic candle system The present invention relates to an array of simulated candles, utilizing light bulbs, which allows the user to turn on any selected light bulb merely by pointing a wand close to the light bulb to be turned on. Once turned on the light bulbs are caused to...	01/08/1985
4463287	Four lamp modular lighting control The invention is directed to a circuit and a method for efficiently controlling the output illumination level of a gas discharge lighting arrangement having four or more gas discharge lamps with multiple ballasts. Load side control of each ballast is prov...	07/31/1984
4459515	Phase-controlled ballast having shifting control This invention relates to a circuit for shifting a control signal from governance by one variable function to governance by another. It is more particularly concerned with a phase-controlled ballast wherein such a circuit shifts the control from a functio...	07/10/1984
4396871	Arrangement for digital brightness control of lamps The invention relates to an arrangement for digital brightness control of lamps or groups of lamps in control channels particularly for use in planetarium illumination comprising in each control channel a programmable counter, a bistable flip-flop, and a ...	08/02/1983
4388567	Remote lighting-control apparatus A main control device comprises a plurality of lighting-control signal generators for generating lighting-control signals whose contents can be analogously varied, and a keyboard for specifying the contents of mode signals corresponding to those of the li...	06/14/1983
4388562	Electronic ballast circuit An electronic ballast circuit for powering a plurality of fluorescent lamps or the like from an unsmoothed DC voltage source includes a sine wave converter operatively connected to receive said DC voltage, for generating a high frequency alternating volta...	06/14/1983
4220895	Non-interfering, overlapping high frequency signalling for lamp dimmer circuit A network for the development of a square wave in a first time period as set by the timing occurrence of a first voltage to a predetermined threshold level and another network for the development of a square wave in a second time period as set by the timi...	09/02/1980
4096414	Dimmer control circuit An improved solid state electronic dimmer circuit for controlling the intensity of large electric lamps, such as theater and television lamps, in response to a low power DC control signal. The transfer characteristic of the circuit is determined by the pr...	06/20/1978
4037135	Solid state timer-stepper with soft switch-on and switch-off load control A timer-stepper, which is particularly applicable to light chasers for producing a special "ripple" lighting effect and increasing bulb and logic circuit component lives, having photoncoupler phase-shifting networks in the gate circuits of switching triac...	07/19/1977

PatentStorm

Bizarre Patents

PatentStorm News

Class 315/195 - Plural load device systems