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Match Document Document Title
9013114 Power control system for an illumination system  
A power control system for an illumination system has a power source to supply any one of a range of AC or DC voltages, a power conversion stage, one or more light emitting device(s) for...
8890425 Blend dimming circuits and relevant methods  
The present disclosure relates to blend dimming circuits and methods for driving light loads. In one embodiment, a method can include: converting an external sinusoidal AC power supply to a...
8716944 Non-isolated AC/DC converter with power factor correction  
A non-isolated AC/DC converter having power factor correction, comprising an active switch connected to a waveform controller for control, and sequentially showing conduction, cut off, making the...
8304998 Dimmable light generating device  
A compact gas discharge lamp (301) comprising four (or more) interconnected tube segments (11, 12, 13, 14) is provided with an external electrode (310) that extends at least throughout the length...
8144109 Inverter for light source device, light source device, display device and liquid crystal display device  
In a light source inverter rectifier circuits are respectively connected to a CCFL in a substantially U-shaped lamp and a CCFL in a substantially U-shaped lamp, and the outputs from the rectifier...
7026767 High-efficiency power supply apparatus used with a display panel driving system and method thereof  
A high-efficiency power supply apparatus used with a driving system of a display panel and a method of designing the same to improve an electrical power efficiency by providing a non-isolated...
6987363 Emergency ballast for compact fluorescent lamp with battery heater  
An emergency ballast for a compact fluorescent lamp including a heater disposed adjacent the battery for maintaining the battery at a safe and effective operating temperature during the time which...
6566818 High-efficiency and light-adjustable lighting means of two-electrode lamp  
A lighting and starting device for two-electrode lamp includes a plurality of voltage-multiplier rectifying circuits parallelly connected to two electrodes of the lamp with stepping voltages, for...
6118224 Discharge lamp lighting device  
A discharge lamp lighting device includes an inverter circuit connected through a first impedance element across output ends of a rectifier rectifying an AC source power, a smoothing capacitor...
6049178 Circuit for controlling operation of an emergency exit lamp  
In a circuit for controlling operation of an emergency exit lamp, a delay circuit enables a trigger circuit a preset time period after a power outage has occurred. Once enabled, the trigger...
5986407 Control apparatus for permitting operation of an ac-powered lamp unit as an emergency lighting device  
A control apparatus for an ac-powered lamp unit includes a charging circuit for generating a constant current output from an ac power source, a storage battery charged by the constant current...
5912535 Driving circuit for an electric luminescent panel including first and second driving circuits  
A circuit driving electric luminescent panel in which the high potential contact of electric luminescent panel is connected to two parallel connected transistors of which the emitter of the first...
5896013 Operating circuit for an inductively ballasted arc discharge lamp  
Ballast circuitry for a metal halide lamp is disclosed enabling sustained operation with a typical 120 volt AC power source. A novel auxiliary circuit network is operatively associated with...
5838115 Gas discharge device  
In a gas discharge device having a gas discharge channel, which comprises two gas discharge electrodes and a gas discharge volume lying between said electrodes, having an energy storage circuit...
5828182 Apparatus for supplying power from a ballast circuit to an auxiliary load  
The present invention is directed to a power supply circuit for controlling a load which, for example, includes both a gas-discharge lamp and an auxiliary load. The power supply circuit includes a...
5811938 Emergency lighting ballast for starting and operating two compact fluorescent lamps with integral starter  
A method and circuit for operating two fluorescent lamps having a starter with power supplied by a battery by generating an alternating current from energy supplied by the battery, supplying the...
5635800 Ballast circuit with a japped transformer flyback converter providing driving energy for start, glow and run modes of a lamp  
Circuit arrangements generate start, glow, and/or run signals to be applied to and for operating a DC arc discharge lamp. A first circuit arrangement provides start, glow, and run signals. The...
5449989 Energy conversion system  
An energy conversion device includes a discharge tube which is operated in a pulsed abnormal glow discharge regime in a double ported circuit. A direct current source connected to an input port...
5266869 Discharge lamp lighting apparatus having output impedance which limits current flow therethrough after start of discharging  
A discharge lamp lighting apparatus comprises a transformer for stepping up an AC power source voltage from an AC power source to produce a high voltage as an output voltage required for lighting...
5191261 Switching power supply for high-voltage flash lamps  
A flash lamp power supply system, comprising (a) a simmer power supply circuit, comprising (i) a DC simmer power supply, (ii) means for connecting a flash lamp in series with the DC power supply,...
5172032 Method of and apparatus for the energization of electroluminescent lamps  
An electroluminescent lamp is energized by being charged to a first polarity voltage level in step-wise fashion over a first period of time and then being discharged and charged to a second...
5095251 Low voltage DC light apparatus for a neon lamp  
A lighting apparatus for a neon lamp includes a direct current power supply with a relatively low voltage output. The direct current power supply actuates a pulse oscillator to produce a narrow...
5068577 Constant current drive system for fluorescent tubes  
Novel systems, circuits, and methods for initiating ionization, maintaining constant illumination current, and extinguishing illumination in a gas discharge tube and in gas discharge tube arrays....
5045759 Power supply for laser flashlamp  
An N-phase power supply (1) for operation of a laser flashlamp (F). A first electrical circuit (3) is connected between an N-phase source of electrical energy and the flashlamp for continuously...
5015919 Emergency lighting system provided with a fluorescent tube  
An emergency lighting system provided with a U-shaped fluorescent tube having power supplied by a square wave oscillator connected to a relatively small sized battery. A battery charger is...
5004953 Emergency lighting ballast for compact fluorescent lamps with integral starters  
A method and circuit for operating a fluorescent lamp having a starter with power supplied by a battery by generating an alternating current from energy supplied by the battery; supplying the...
5001386 Circuit for dimming gas discharge lamps without introducing striations  
A dimming circuit provides power from an ac source to a compact fluorescent lamp. The circuit generally includes a resonant circuit driven by a high-frequency switching inverter. The resonant...
4890041 High wattage HID lamp circuit  
A lamp start, hot-restart and operating circuit for a high wattage, high intensity discharge lamp includes cascaded resonant circuits with capacitors and series-connected inductors connected to an...
4818917 Fluorescent lighting ballast with electronic assist  
A ballasting circuit for fluorescent lamps includes a series-connected current limiting ballast element and an electronic assist circuit. The ballast element has a high voltage side connectable to...
4792727 System and method for operating a discharge lamp to obtain positive volt-ampere characteristic  
A system and associated method for operating a gas discharge lamp so as to provide a positive voltage-current characteristic. An AC or DC source is used to provide electron heating, without in...
4734841 Laser power supply circuit  
A power supply circuit for a gas laser has primary circuitry and secondary circuitry supplied by the primary circuitry. A transformer is positioned between the primary circuitry and a secondary...
4651061 Apparatus to facilitate lengthening the life of incandescent lamps  
An energizing circuit for an incandescent light bulb includes two rectifiers with their outputs connected in parallel across the bulb. One rectifier has a low voltage output to keep the bulb...
4631451 Blast gap ignition system  
A spark plug for an ignition system has a ring gap between two electrodes. A first electrode has a ring shape defining a central opening. A second electrode is positioned within the central...
4620136 Digital vertical beam landing correction circuit  
Circuitry corrects vertical beam landing errors for color cathode ray tubes. A digital delay circuit provides horizontal scan line video pixel information at its proper location to produce a...
4614898 Electronic ballast with low frequency AC to AC converter  
A gas discharge lamp is started with a high frequency AC signal from an oscillator and then operates on a low frequency AC signal provided by an AC to AC converter synchronously with the AC supply...
4591761 Relaxation oscillator synchronizer for pulsed laser operation  
Pulse stability is provided to a pulsed gas filled electrical discharge device by an electrical circuit including first and second electrical energy storage means, with the energy stored in the...
4575658 Power supply for a ring laser  
A power supply circuit is disclosed for a ring laser having a cathode and having first and second anodes so that the ionization current between the cathode and each of the anodes are substantially...
4550272 Operating circuit for electric discharge lamp  
There is disclosed an operating circuit for an electric discharge lamp in which a first DC operating circuit for starting an electric discharge lamp, a second DC operating circuit for making the...
4530550 Power supply unit for electronic flash  
A power supply unit for electronic flash includes a plurality of charging units connected to a main capacitor of an electronic flash through diodes which prevent a reverse current flow. Each...
4510419 Grip-type photographic flash discharge device  
A photographic flash device comprising a grip portion and a flash unit removably attachable thereto. Both the grip portion and flash unit house battery-powered DC-DC converters which cooperate...
4500812 Electronic ballast circuit  
An electronic ballast circuit for a lower pressure lamp wherein a voltage divider network coupled by a capacitor and directly coupled to an AC source is shunted by a series connected transistor...
4469981 Circuit for the operating of gas discharge lamps  
In a circuit for the operating of gas discharge lamps in which a starting circuit (2, 17) having a starter transformer (17) and a source of auxiliary voltage which can be disconnected after...
4430738 Arrangement for the current limitation during the current supply of electrically excited gas lasers  
An arrangement for the current limitation during the current supply of electrically excited gas lasers includes a rotary current transformer, self-inductances provided in front of a rotary current...
4417180 Lamp firing apparatus  
A discharge lamp firing apparatus is disclosed which includes providing only the necessary firing voltage to the lamp prior to the firing thereof. As such, the surrounding system is not subjected...
4394603 Energy conserving automatic light output system  
An energy conserving lighting system is provided wherein a plurality of fluorescent lamps are powered by a poorly regulated voltage source power supply which provides a decreasing supply voltage...
4392086 Apparatus for operating a gaseous discharge lamp  
An apparatus for a gaseous discharge lamp includes a power controlling device for converting an AC voltage into a phase control output, a high frequency generating device for converting the output...
4388561 Apparatus for operating discharge lamps  
A low frequency AC voltage is rectified through a full-wave rectifier to obtain a pulsating voltage, which is superimposed with an auxiliary voltage of a predetermined level provided from an...
4385261 Method and apparatus for the execution of gas discharge reactions  
A method and apparatus for producing gas discharge reactions in which a reaction gas is at least partially oxygenated after being taken through a discharge channel. In order to produce ozone by...
4365186 High energy modulation ignition system  
An ignition system (51-59, 60, Ql, Qn, 30) providing high modulation energy by means of modulator (30) is used to fire an igniter and effect total fuel burning without detonation. An extremely...
4330737 Electronic flash system  
There is disclosed herein an electronic flash system which obviates the need for the typical large capacity main capacitor as the power source for the flashtube. The system includes a conventional...

Matches 1 - 50 out of 404 1 2 3 4 5 6 7 8 9 >