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8134308 |
Method for driving a PTC electrical load element
A method is intended to make it possible to drive a PTC electrical load element with a switching unit with the highest possible operational reliability. For this purpose, the electric current is...
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8063580 |
Circuit arrangement and method of driving a high-pressure gas discharge lamp
A pair of magnetically coupled inductors forms a current-compensated choke arrangement for reducing electromagnetic disturbances and for weakening the effects of glitch pulses during the ignition...
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8053997 |
Load control device having a trigger circuit characterized by a variable voltage threshold
A two-wire load control device, such as a dimmer, is operable to control the amount of power delivered to an electrical load, such as a magnetic low-voltage (MLV) load, and comprises a...
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8013543 |
Backlight control circuit
An exemplary backlight control circuit includes a transformer, a control circuit, a lamp. The control circuit and the transformer form an inverter circuit to providing an alternating current (AC)...
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7880396 |
Projector device employing ballast with flyback converter
A projector device employing ballast with a flyback converter is disclosed. For example, one embodiment comprises a lamp driver circuit including a power stage circuit including a flyback converter...
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7746005 |
Circuit arrangement and method for the operation of a high-pressure gas discharge lamp
A circuit arrangement for operating a high-pressure gas discharge lamp has an igniting-circuit circuit arrangement having a capacitor able to be connected via two terminals to a voltage supply...
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7705544 |
Lamp circuit with controlled ignition pulse voltages over a wide range of ballast-to-lamp distances
A lamp ignition circuit provides a high voltage electrical pulse to ignite a gas discharge lamp. A non-linear filter element within a charge circuit regulates the voltage of the ignition pulse such...
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7656099 |
Circuit arrangement for operating high-pressure discharge lamps and operating method for a high-pressure discharge lamp
The invention relates to a circuit arrangement for operating high pressure discharge lamps and corresponding operating method, whereby the input voltage for the pulsed trigger device is increased...
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7643267 |
Optical emission spectrometry device
An optical emission spectrometry device is provided. In the optical emission spectrometry device, a discharge path is formed by connecting an ignition circuit to a discharge gap, and further...
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7432660 |
IC-based low cost reliable electronic ballast with multiple striking attempts and end of lamp life protection
The present invention relates generally to a simple, low cost ballast for fluorescent lamps that incorporates an integrated circuit and a number of ballast protection functions to cost effectively...
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7425799 |
Current detecting circuit
The object of the present invention is to provide a current detecting circuit capable of detecting a current flowing to a switching device with high accuracy, with less power loss, with high...
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7414373 |
Discharge lamp driving circuit and method of driving a discharge lamp
A discharge lamp driving circuit includes an inverter, a ballast capacitor, a discharge lamp, and a lamp current detecting circuit. The inverter converts a DC voltage into an AC voltage with high...
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7401603 |
High tension capacitive discharge ignition with reinforcing triggering pulses
A capacitive discharge ignition system in which a controllable switch is positioned between a storage capacitor and the primary winding of an ignition transformer. The switch is controlled to...
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7385356 |
Energy saving startup circuit for power supply
A startup circuit (30) for a power supply (44), has an input (31) for connecting to a source of high voltage thereto, and an output rail (33) for feeding rectified voltage to the power supply. A...
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7378803 |
Igniting pulse booster circuit
A pulse booster circuit (10) comprises a first pulse transfer path (41) and a second pulse transfer path (42) extending between input terminals (11a; 11b) and output terminals (12a; 12b). A series...
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7339330 |
Methods and circuits for instant hot restart of high intensity discharge lamps
A lamp ballast for operating a high intensity discharge lamp includes an electronic ballast circuit to supply an operating voltage to the discharge lamp, and an igniter circuit to supply starting...
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7291983 |
Ballast and igniter for a lamp having larger storage capacitor than charge pump capacitor
A ballast according to the present invention operates in an ignition state, a warm-up state, and a steady state for igniting and powering a lamp. The ballast comprises an igniter that ignites the...
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7230389 |
Metal halide lamp having function for suppressing abnormal discharge
A metal halide lamp includes a ceramic arc tube that is composed of a main body and two narrow tube parts provided at respective ends of the main body; a pair of electrodes provided inside the main...
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7221103 |
Circuit for operating high-pressure discharge lamps
A circuit for operating high-pressure discharge lamps, wherein a voltage transformer for power supply to a loading circuit includes a connection for the high-pressure discharge lamp (La) and for...
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7193368 |
Parallel lamps with instant program start electronic ballast
In a current fed electronic ballast multiple lamps are operated in a parallel circuit arrangement. The ballast provides pre-heating to the cathodes of the lamps for a period of time before an open...
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7164239 |
Discharge lamp ballast circuit
A discharge lamp ballast circuit is provided which can prolong the life of a discharge lamp, and reduce the size and cost of the ballast circuit. It generates from an AC voltage boosted by a DC-AC...
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7106007 |
Flashlight lamp circuit with automatic light adjustment
A flashlight lamp circuit with automatic light adjustment includes a flashlight charging unit for controlling charging of a main capacitor, a flashlight activation unit activating the flashlight...
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7095181 |
Method and apparatus for controllably generating sparks in an ignition system or the like
An apparatus for controllably generating sparks is provided. The apparatus includes a spark generating device; at least two output stages connected to the spark generating device; means for...
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7088054 |
Apparatus for emitting pulses of light and systems employing such apparatus
An apparatus with a flash lamp can trigger a flash of light by application of an ignition pulse. The apparatus encompasses a first capacitor, a second capacitor, a switching element and a control...
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6972529 |
Switch mode power supply for a gas discharge lamp
A switch mode power supply for igniting and operating a high-pressure gas discharge lamp includes an ignition sub-circuit which is coupled via a transformer to the circuit. The ignition sub-circuit...
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6891335 |
Electric gas lighting device
An electric gas lighting device including an ignition circuit for generating sparks at at least one burner and connected to a supply line, supplying a supply voltage, via enabling means for...
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6788005 |
Inverter and lamp ignition system using the same
An inverter for igniting a discharge lamp comprises a transformer, a first switch transistor, a second switch transistor, a first snubber capacitor, a second snubber capacitor, a reset capacitor,...
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6774579 |
Electric discharge lamp and electric discharge lamp drive apparatus
A lighting control signal generating circuit 10 controls the output pulse of a drive signal circuit 11 by the output signal. The output pulses of the drive signal circuit 11 include a first and a...
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6724155 |
Lamp ignition circuit for lamp driven voltage transformation and ballasting system
A lamp ignition circuit is provided which can initiate operation of a gas discharge lamp using a driving voltage which is similar in magnitude to the lamp operating voltage. The lamp ignition...
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6707260 |
Circuit arrangement including DC-AC converter having a dependable start circuit
A self-oscillating bridge circuit comprises a start circuit for rendering one of the switches conductive for the first time at the start of operation. The start circuit is configured in such a way...
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6680587 |
Electronic ballast with adaptable charge pump power factor correction
A ballast (20′) for powering a plurality of gas discharge lamps (12,14,16) includes a load-adaptable charge pump power factor correction arrangement (62,64,66,100,200,300) for feeding back a high f...
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6670777 |
Ignition system and method
An ignition system for an engine includes an exciter circuit for use with an igniter, the exciter circuit having a step-up transformer the utilizes a relatively low voltage in its primary to...
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6608451 |
Ballast circuit with an ignitor for starting multiple HID lamps
A ballast circuit with an ignitor circuit for starting serially connected HID lamps is provided. The ballast circuit comprises an electromagnetic ballast arrangement for driving the lamps and an...
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6593703 |
Apparatus and method for driving a high intensity discharge lamp
A circuit arrangement and control thereof for igniting a high intensity discharge lamp, for reducing current stresses imposed on semiconductor devices during a polarity transition of a lamp voltage...
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6528956 |
Electronic ballast for high-intensity discharge lamps
An electronic ballast for supplying operating power to a high-intensity discharge (HID) lamp. The ballast includes a full-wave rectifier connected to an AC power line to produce an unregulated...
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6522088 |
Lamp ignition with automatic compensation for parasitic capacitance
Ballast circuitry is provided for powering a gaseous discharge lamp which has a range of possible parasitic loading capacitances associated with it. The circuitry includes a reactive source of...
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6504313 |
Ignition scheme for electronic HID ballast
An improved ignition circuit for a high intensity discharge (HID) lamp is disclosed. The ignition voltage is provided across a single capacitor, and at the end of the ignition phase, a second...
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6396220 |
Lamp ignition with compensation for parasitic loading capacitance
A ballast for powering a gaseous discharge lamp that has a required minimum ignition voltage and a permissible maximum ignition voltage. Via a cable through which ignition voltage pulses are...
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6388392 |
System for providing auxiliary power to lighting unit for heavy equipment having a direct current power supply and no uninterruptible power supply
An apparatus for providing auxiliary power to a lighting system for heavy equipment during interruptions of power from a 250 volt direct current (DC) power supply is provided. The DC power supply...
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6323603 |
Resonant flyback ignitor circuit for a gas discharge lamp control circuit
A gas discharge lamp control circuit includes a series circuit formed by first and second AC input terminals, an inductance and first and second lamp terminals. An ignitor circuit is coupled to the...
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6281638 |
Converter/inverter full bridge ballast circuit
A circuit for driving a load. In one embodiment, the load is driven by an inverter circuit having a full bridge circuit divided by inductive elements to provide cross conduction protection. In...
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6242866 |
Electric gas-lighter
The electronic circuit of a gas-lighter has an electronic filter inserted between the input terminals of the gas-lighter and a current-discharge generating circuit. The filter has a first pair of...
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6194843 |
HID ballast with hot restart circuit
A ballast includes a hot restart circuit for hot restart of a HID lamp. In one embodiment, the hot restart circuit includes inductively coupled first and second inductive elements coupled end to...
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6191536 |
Solid-state ignition system using true voltage triggering
A capacitive discharge ignition system is described that incorporates a two-terminal passive network for controlling the discharge of a capacitive energy storage device into an igniter plug,...
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6188180 |
Ignition circuit for automotive high intensity discharge lamps
An ignition circuit for a high intensity discharge (HID) lamp, comprising: first and second series coupled switching transistors connected across upper and lower voltage buses to which a source of...
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6184662 |
Pulsed power supply device
A pulsed power supply device in which a capacitor (23) having a charged voltage is discharged quickly upon closure of a switch (24). First and second series circuits (51, 52) are connected to each...
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6127787 |
Sequential, clamped, single-ended ignition of series operation arc lamps
A series of arc lamps is ignited sequentially while maintaining a specified voltage on one side of each lamp with dielectric insulation on the high voltage side.
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6104143 |
Exciter circuit with solid switch device separated from discharge path
An exciter circuit for an ignition system including an igniter plug. The exciter circuit includes an energy storage device comprising a pair of capacitors and a charging circuit for charging the...
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6081074 |
Method and apparatus for offsetting power draw in a multiple channel system
An apparatus and method are disclosed for reducing peaks of operating power drawn from a power source by a multi-channel system. Each channel of the system drives a load and demands operating power...
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6049176 |
Ignition device for an internal combustion engine
An ignition device for an internal combustion engine capable of suppressing not only a decrease in the discharge energy of the spark plug but also the LC resonance itself. When an igniter 13 is...
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