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| Number | Title | Issue Date |
| 7102334 | Method and apparatus for electronic power control The method of the invention in one aspect involves electronic power control by varying the amplitude of an electrical power supply voltage, independent of frequency, whereby the output frequency will always be the same as the input frequency. An electrical circuit a... | 09/05/2006 |
| 7034465 | Device for operating discharge lamps by means of a transformer with four windings, and a corresponding method A device for operating a plurality of discharge lamps is to be fashioned cost-effectively. Consequently, two discharge lamps (71, 72) are operated with the aid of one ballast in whose load circuit the heating current for the individual incandescent filaments ... | 04/25/2006 |
| 6633137 | Electrical apparatus An electrical apparatus comprises a circuit board, providing an electrolytic condenser and electrical components, and a housing. The housing accommodates the circuit board. The electrical components include resin containing one or more halogen compounds o... | 10/14/2003 |
| 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 instance, high, medium and low voltage levels, whereby upon... | 05/20/2003 |
| 6201356 | Converter for correcting resonance frequency between backlit panel assembly of liquid crystal display and transformer of AC inverter The specification discloses a converter for correcting the resonance frequency between the backlit panel assembly of a liquid crystal display and the transformer of an AC inverter. The convert has on its both ends a first connector for plugging in a disch... | 03/13/2001 |
| 6046547 | Self-emission type image display device A self-emission type image display device comprising a first transparent substrate, transparent pixel electrodes and driving elements for respectively driving the transparent pixel electrodes which are respectively formed on one surface of the first trans... | 04/04/2000 |
| 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 provides electrical energy to initiate emission pulses, and a... | 09/12/1995 |
| 5313140 | Field emission device with integral charge storage element and method for operation Field emission device apparatus employing an integrally formed capacitance and a switch serially connected between a conductive element and a current source to provide substantially continuous emitted electron current during selected charging periods and ... | 05/17/1994 |
| 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 a discharge lamp. Particularly, the lighting apparatus furt... | 11/30/1993 |
| 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, and (iii) a capacitor connected in parallel to the power su... | 03/02/1993 |
| 5079484 | Voltage-regulated supply, notably for microwave tubes A supply unit for a tube of the type requiring both a cathode supply and a collector supply, notably for a travelling wave tube. The tube features a collector biasing device, working essentially as a voltage source, delivering a weakly regulated or unregu... | 01/07/1992 |
| 5041766 | Power-factor-controlled electronic ballast A self-oscillating half-bridge inverter is powered from a power-line-operated rectifier means providing a DC voltage with a relatively high ripple content. The inverter is loaded by way of a series-tuned high-Q LC cirucit connected across this DC voltage.... | 08/20/1991 |
| 4748382 | Electric circuit arrangement An electric circuit arrangement for use in energising a flash tube (3) to provide a series of pairs of flashes, each pair consisting of a main flash and a rapidly following second flash, includes first and second capacitors (C9, C10) which are controlled ... | 05/31/1988 |
| 4698518 | Magnetically switched power supply system for lasers A laser power supply system is described in which separate pulses are utilized to avalanche ionize the gas within the laser and then produce a sustained discharge to cause the gas to emit light energy. A pulsed voltage source is used to charge a storage d... | 10/06/1987 |
| 4612478 | Dimmer circuit for high intensity discharge lamp A lamp dimmer circuit for a high intensity discharge lamp includes an auto transformer, a power factor correction capacitor, a reactor ballast, a solid state phase control current module, a dimming control, a high frequency power supply, a coupling transf... | 09/16/1986 |
| 4612643 | Electric glow discharge using prepulse and charge storage device A method and apparatus for transferring energy to a gas by means of a glow discharge. A transmission line is charged to a voltage of approximately twice that of the steady-state voltage of the glow discharge. A prepulse voltage source, having a higher vol... | 09/16/1986 |
| 4593233 | Lamp drive circuit An alternator circuit comprises an alternator having an armature winding, a field winding, a voltage regulator, a fault detecting circuit, a lamp drive circuit having its input connected to the output of the fault detecting circuit, and a warning lamp dri... | 06/03/1986 |
| 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 first storage means being substantially greater than the ener... | 05/27/1986 |
| 4550275 | High efficiency pulse ultraviolet light source A high efficiency pulsed ultraviolet light source is provided which comprises a flashlamp containing a noble gas, for example xenon, at low pressure, and having a pair of electrodes between which a discharge through the gas may be impressed, and an electr... | 10/29/1985 |
| 4539513 | Circuit arrangement for starting and operating a high-pressure gas discharge lamp A circuit arrangement for starting and operating a high-pressure gas discharge lamp having an outer starting electrode connected to an igniter. A full-wave rectifier (1) is connected to an alternating voltage supply (A, B) and has an output shunted by a s... | 09/03/1985 |
| 4529914 | High intensity discharge lamp ignition system A high intensity discharge (HID) lamp has an arc tube including a pair of main electrodes and at least one auxiliary electrode or probe, wherein a high frequency (HF) high voltage is applied to the probe for forming a high frequency (HF) ignition discharg... | 07/16/1985 |
| 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 switch and capacitor filter, and the switch is coupled by a d... | 02/19/1985 |
| 4499533 | Power supply apparatus A power supply apparatus is structured such that the output of an alternating current voltage source (1) is connected to the input of a rectifying circuit (2), a series connection of a first smoothing capacitor (3a), a diode (15) and a second smoothing ca... | 02/12/1985 |
| 4469990 | Electronic flash device In an electronic flash device of the type having a power supply unit comprising a low DC power supply and a DC-DC converter and an IC memory which can maintain its stored information even if when a power supply switch is turned off, there are provided a b... | 09/04/1984 |
| 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 starting has been effected are provided for the starting of the l... | 09/04/1984 |
| 4447766 | Supply device for a flash tube Supply device for a flash tube comprising a capacitor, a d.c. voltage source connected to the capacitor, an energy switch located between the capacitor and the flash tube, a circuit able to emit a control pulse for the said switch and a preionization circ... | 05/08/1984 |
| 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 to transients caused by conventional mechanisms which sudde... | 11/22/1983 |
| 4408154 | Dual voltage power supply with input filter A dual voltage power supply, for example operable from 120 and 240 volts a-c and having three voltage input terminals, is provided with an input filter having three windings on a core and inductively coupled together, the three windings being connected re... | 10/04/1983 |
| 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 of the high frequency generating device into an high frequ... | 07/05/1983 |
| 4392085 | Direct drive ballast with delayed starting circuit A delayed starting circuit for an electronic ballast system that includes an inverter coupled to a secondary voltage source. The starting circuit includes a voltage divider having an input coupled to a charge storage capacitance in the voltage source and ... | 07/05/1983 |
| 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 auxiliary power source, and the resultant composite pulsating vo... | 06/14/1983 |
| 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 means of an electric discharge, the discharge channel has app... | 05/24/1983 |
| 4384239 | Electrical circuit for gaseous discharge lamp An improved electrical circuit for selectively controlling the power to a gaseous discharge lamp. One use for such circuit and lamp is in an ink-curing process for objects printed with multiple-colored ink wherein areas of the object are printed and cured... | 05/17/1983 |
| 4362971 | Power supply for arc discharge devices This application discloses circuits for use with arc discharge devices wherein a D.C. or A.C. high frequency, high voltage source is provided in conjunction with either a low frequency or D.C. voltage source. The high frequency, high voltage circuit is a ... | 12/07/1982 |
| 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 flashtube, trigger circuit for ionizing the flashtube and ... | 05/18/1982 |
| 4317068 | Plasma jet ignition system An improvement on conventional internal combustion ignition systems, which improvement comprises a capacitor connected parallel to the secondary winding of the ignition transformer, and a bypass circuit through which energy stored in the primary circuit i... | 02/23/1982 |
| 4310785 | Electronic photographic flash apparatus In an electronic photographic flash apparatus comprising a DC-DC converter, a high tension capacitor, and a gas-discharge flash tube to produce a light flash by consuming electric energy stored in said high tension capacitor, the improvement is that the a... | 01/12/1982 |
| 4293798 | Inductive-capacitive cyclic charge-discharge ignition system An inductive-capacitive cyclic charge-discharge ignition system includes an ignition transformer primary winding in parallel with a capacitor and fed by an alternating current source providing a plural number of repetition cycles during each igniter firin... | 10/06/1981 |
| 4288723 | Inductive-capacitive cyclic charge-discharge ignition system An inductive-capacitive cyclic charge-discharge ignition system includes an ignition transformer primary winding in parallel with a capacitor and fed by an alternating current source providing a plural number of repetition cycles during each igniter firin... | 09/08/1981 |
| 4256994 | Actuating circuit for light measuring circuit in electronic flash device A computer type electronic flash device is disclosed. The flash device has an auxiliary capacitor for producing a bias voltage which is to be superimposed on the charged voltage across the main capacitor upon triggering of the flash tube, and an impedance... | 03/17/1981 |
