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7522832 |
Apparatus and method for strobe charging
An apparatus and method for strobe charging is disclosed. The apparatus and method can dynamically adjust a charging current according to current power level of a battery, thereby stabilizing the...
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7486491 |
Ground detector and DC-AC inverter for vehicles
A ground detector includes a pair of lines, a first series circuit, a reference portion, a second series circuit, and a detection point. The first series circuit connects the lines to each other....
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7471049 |
Optical element driving circuit
Optical element driving circuits flexibly configure energy sources to cause a flash tube to produce illumination at one of multiple output intensities. The driving circuits allow a single strobe...
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7423385 |
System and method for controlling voltage on discharge capacitors which control light energy from flash lamps
A system and method are described for controlling voltage on discharge capacitors which control light energy from flash lamps, wherein the method includes measuring over time an operational...
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7394206 |
Electronic ballast with life-ended protection
An electronic ballast includes a rectifier and filter circuit, a DC/AC inverter circuit and a resonant circuit. An input of the rectifier and filter circuit is connected to an outside power supply,...
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7375471 |
Charging circuit
A charging circuit has a battery 12 , switching element 14 , and resistor 16 for current detection arranged on the primary side of transformer 10 . Diode 18 and capacitor 20 for storing...
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7235931 |
Discharge lamp lighting apparatus for lighting multiple discharge lamps
In a discharge lamp lighting apparatus to light two discharge lamps, one terminal of the secondary side of a step-up transformer is connected to one terminal of each of the two discharge lamps, the...
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7221100 |
Gas discharge lamp power supply
An apparatus for providing power to a gas discharge lamp comprises a storage capacitor and an ignition switch coupled through a primarily parasitic first inductor to a parallel combination of a...
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7190124 |
Two-wire dimmer with power supply and load protection circuit in the event of switch failure
A dimmer circuit provides AC power to an inductive lighting load in series with the dimmer circuit. A bidirectional semiconductor switch has a control electrode with a control signal for...
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6965203 |
Method and circuit for repetitively firing a flash lamp or the like
Disclosed is a method and circuit for repetitively firing a flash lamp. The method utilizes a power supply having a periodic voltage signal. The method times the discharge of the flash lamp to...
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RE38837 |
Efficient power transfer in electronic ballast
An electronic ballast for one or more F32T8 or F25T8 or F1718 fluorescent lamps has a new design tool for efficient transfer of power to the lamp or the lamps. The design tool is constructed from...
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6870325 |
Led drive circuit and method
An LED drive circuit is disclosed, comprising an electronic controller which is arranged to monitor LED current as a first input. The controller also receives a second input from a sensor...
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6798142 |
Flash emitting device and radiant heating apparatus
In a flash emitting device, a flash from the plurality of flash discharge lamps is emitted on a work piece. The flash emitting device has a plurality of flash discharge lamps arranged in parallel...
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6774576 |
Switch mode energy recovery for electro-luminescent lamp panels
High voltage and low voltage switch mode circuits and methods serve to recover the charge stored on electro-luminescent lamp panels that would otherwise be dissipated during the discharge cycle of...
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6719753 |
Means and method for energizing a flash lamp
A method and structure for energizing a flash lamp for producing a high energy light pulse, with the flash lamp energized by a flattened and extended current pulse. The method includes collecting...
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6672738 |
Decorative ornament
The invention relates to a decorative ornament. The ornament includes a circuit board shaped in an aesthetically desirable manner to provide a background for the decorative ornament, a plurality of...
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6603273 |
Fast accelerating flow generator power supply
Methods and apparatus for the supply of non-invasive positive pressure ventilation by motor-driven blowers, and having fast acceleration between treatment pressures, are described. A blower ( 12 )...
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6593705 |
Rapid-firing flashlamp discharge circuit
A flashlamp circuit includes a charge reservoir that receives a first voltage from an external source. The charge reservoir is coupled to a resonator and a plurality of discharge capacitors to...
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6590349 |
Bidirectional flip-flop
A bidirectional switch, including a first bidirectional switch between two power terminals of the switch, a low-voltage storage element between a first power terminal and a control terminal of the...
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6566822 |
Electronic circuits for detecting filament breakage in gas discharge lamps
Disconnection device for an electronic operating device for gas discharge lamps. The DC component is evaluated at a coupling capacitor (C 5 ) specifically via a filament. Disconnection is performed...
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6509695 |
Flash apparatus and camera having the flash apparatus
In a flash apparatus, when it is determined that the oscillation of a voltage boosting circuit is stopped before it is controlled so as to stop, it is possible to continuously charge a voltage to a...
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6461348 |
Photo-thermal epilation apparatus with advanced energy storage arrangement
A photo-thermal epilation apparatus enables the efficient delivery of a high energy light pulse of a sufficiently short duration to a selected follicle to effect permanent hair removal. The...
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6393220 |
Camera with electronic flash
A power source part supplies power to an electronic flash charging circuit and camera circuits such as an LCD backlight circuit. When the charge begins, the electricity stops being supplied to the...
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6356037 |
Dielectric ceramic and a capacitor using the same
An inexpensive capacitor for pulse generation whose characteristics do not deteriorate even when the capacitor is used in a high temperature, high vacuum, reducing atmosphere, and which enables...
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6337543 |
High power cold cathode gas discharge lamp using sub-electrode structures
A high power cold cathode gas discharge system employs two electrode structures, where each structure includes a plurality of sub-electrodes connected in parallel to a driver so that the current...
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6181082 |
Ballast power control circuit
A ballast circuit for energizing a lamp includes an inductive element coupled to an input terminal and a capacitive element coupled to the inductive element in parallel with the lamp. In one...
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6177768 |
Discharge lamp lighting device and illumination device
The electrodes of a discharge lamp are prevented from reaching damaging temperatures which tend to occur when the discharge lamp is near the end of its useful life. The combination of a discharge...
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6144174 |
Control device for low-pressure fluorescent lamp
To control low-pressure fluorescent lamps, there is provided a device comprising a first change-over switch circuit and a second change-over switch circuit, respectively including a first power...
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6118222 |
Circuit for complementing an AC mains voltage, particularly for resistive loads
A circuit for complementing the AC mains supply voltage, particularly for resistive loads, comprising a rectifier inserted between an AC power source and a resistive load and adapted to prevent the...
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6104144 |
Charging circuit for stroboscope
A conventional stroboscope circuit in use for a film camera has encountered with problems that charging of a main capacitor is incapable when other functions of the camera are operated and that a...
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6078145 |
Synchronous two wire multiple strobe autotrigger control circuit
An apparatus for simply retrofitting pre-existing vehicular incandescent hazard flashing lamps or strobe assemblies having high voltage wiring with low voltage, low-cost, two wire synchronized...
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6066925 |
Capacitive discharge-lighting of an incandescent lamp
The peak voltage of a periodic capacitive discharge, applied across first and second electrodes of the incandescent lamp, is about equal to the nominal DC voltage of the lamp multiplied by 3.2. The...
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6064159 |
Power-saving stroboscopic device
In a power-saving stroboscopic device, a main capacitor is not completely discharged even in full light emission, so that a predetermined amount of charge can be left in a main capacitor, in order...
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6034486 |
Electronic flash device
The present invention relates to an electronic flash device which, even if the charged voltage of a main capacitor is low, can securely effect a trigger operation by making a trigger voltage higher...
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6011359 |
Multiple flash/single lamp circuit for fast sequential strobing
The present invention discloses a multiple flash/single lamp circuit for fast sequential strobing. More particularly, the present invention comprises a flashlamp, a pair of capacitors, a voltage...
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5969479 |
Light flashing system
A light-flashing system for flashing lights on and off and for generating a pattern of illumination for a plurality of lights in response to intermittent switch closures. The system includes a...
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5949196 |
Method and system for switchable light levels in operating gas discharge lamps with an inexpensive single ballast
An arrangement for switchably operating one or more gas discharge lamps, such a compact or circline fluorescent lamps, with a single ballast commonly used with a linear fluorescent lamp. One or...
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5903109 |
Electrodeless low-pressure discharge lamp with specific electrical conductor clamping means
An electrodeless low-pressure discharge lamp according to the invention has a lamp vessel (1) which is closed in a gastight manner, which contains an ionizable filling, and which has a cavity (10)....
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5894202 |
Ignition device for gas discharge lamps, particularly for motor vehicle lights
An ignition device for gas discharge lamps is proposed, in particular for motor vehicle lights. The ignition device contains a first transformer (17) which is supplied on its primary side with an...
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5869936 |
Strobe device
A strobe device according to the present invention includes: a main capacitor; and step-up means including at least one step-up capacitor, the at least one step-up capacitor being rapidly charged...
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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...
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5814948 |
Flash circuit for low cost cameras
A flash circuit for a low cost camera in which a voltage dependent resistor is employed as a flash capacitor charge voltage sensing device to perform a control effect in the flash circuit, such as...
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5736819 |
Parallel-tuned electronic ballast with special output voltage waveform
Power to a self-oscillating inverter ballast is supplied from a DC voltage source through an inductor means having two separate windings on a common magnetic core--with one winding being positioned...
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5661372 |
Stroboscopic instrument having a gate-controlled-switching element and a step-up power means therefor
A stroboscopic instrument is constructed of a gate-controlled switching element forming a discharge loop that is connected in series with a discharge lamp and main capacitor for storing charge that...
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5606222 |
Lighting system with a device for reducing system wattage
A lighting system having a gas discharge lamp and a stabilization ballast further includes a low loss device to reduce the current through the ballast and lamp, thereby reducing system wattage for...
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5602446 |
Fast repetition rate (FRR) flasher
A fast repetition rate (FRR) flasher suitable for high flash photolysis including kinetic chemical and biological analysis. The flasher includes a power supply, a discharge capacitor operably...
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5585700 |
Electronic ballast
An electronic ballast for one or more F32T8 or F25T8 or F17T8 fluorescent lamps has a new design tool for efficient transfer of power to the lamp or the lamps. The design tool is constructed from...
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5574337 |
Single touch flash charger control
An electronic flash device including a self-oscillating charging circuit, a momentary trigger for initiating oscillations of the circuit to charge a flash capacitor, and a voltage sensing device...
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5570077 |
Ambient condition detector with high intensity strobe light
A drive circuit for use with an ambient condition detector limits heat dissipation and associated temperature rises in the presence of varying RMS values of an applied AC signal. The drive circuit...
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5543690 |
High voltage ignition circuit for a discharge lamp
The invention relates to a circuit arrangement for operating a discharge lamp. According to the invention the series connection of a PTC thermistor V1 with a bi-directionally acting breakdown...
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