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8928240 Method and system for driving organic LED's  
A method and system for driving an organic light emitting diode (OLED) with a regular LED driver without pre-charge are provided. In the examples, at least one passive element is included in...
8896219 Dimming circuit and method  
A Light Emitting Diode (LED) driver circuit for driving an LED string has a switch-mode power supply coupled to the LED string. A control circuit is provided and has a first terminal coupled to a...
8860323 Plasma lamp with lumped components  
An electrodeless plasma lamp is provided. The lamp includes a conductive enclosure including a dielectric material (e.g., air) and a bulb containing a fill to form a light emitting plasma. A radio...
8760065 Passive anti-arcing protection device for fluorescent lamp ballast  
A passive anti-arcing protection components for electronic ballasts of fluorescent lamps. This protection component is a bridge-rectifier-resistor-capacitor network, containing at least a diode, a...
8749158 Driving a lighting device  
Driving a lighting device by a driving circuit for providing driving power for driving a lighting device, and by a decoupling unit for electrically decoupling the driving circuit from a lighting...
8723442 Drive unit, smoothing circuit, DC/DC converter  
A drive unit has a load driving portion driving a load by a PWM drive method; a soft-start function portion for achieving a soft-start function; and a soft-start disabling portion counting a time...
8441200 Electronic ballast and method for operating at least one first and second discharge lamp  
An electronic ballast for operating at least two discharge lamps is provided, which may include a starting detection apparatus for detecting whether one of the discharge lamps has been started;...
8334659 Electronic driver dimming control using ramped pulsed modulation for large area solid-state OLEDs  
An electronic driver apparatus and methods are disclosed for driving power an organic LED or other large area solid state light source, in which a switch mode DC current source provides DC current...
8334663 Power supply for a load control device  
A load control device adapted to be coupled between an AC power source and an electrical load for controlling the power delivered to the load includes a power supply having an energy storage...
8324833 Light color tunability  
The application relates to setting color point and light intensity. By controlling the phase as well as the amplitudes of a driving voltage for a lighting device, the color point as well as the...
8120267 Light emitting diode driving circuit  
A LED driving circuit includes a bridge rectifier, a high-bias-voltage diode, a balancing capacitor, a driving chip, and a switch. The bridge rectifier receives external AC power and outputs a...
8093816 Cold cathode tube lamp  
A cold cathode tube lamp which can be lighted easily when the ambient temperature is low. The cold cathode tube lamp comprises discharge tubes having a pair of electrodes and being driven when a...
8084951 Inverter and liquid crystal display device including the same  
Disclosed is a liquid crystal display panel which includes a switching circuit for converting an input voltage into an alternating current (AC) voltage, a transformer for boosting the AC voltage...
8067895 Lamp adapter  
The present invention provides a lamp adapter, including a first adapter, a second adapter and a short-circuit. These two adapters are separately coupled between two incoming ends of T5 lamp and...
8035309 Light emitting device  
A light emitting device includes an electronic driver and a planar light emitting element. The driver is connected with a source and the light emitting element, where the light emitting element...
7915835 Imaging apparatus, strobe device, and charging-control method  
An imaging apparatus including a strobe device having a charging circuit of a separately excited oscillation type is provided. The apparatus includes a main capacitor in which charge is...
7688001 Method and system for providing a charge pump for low voltage applications  
A method and system for providing an output voltage greater than a voltage provided by a voltage supply in a semiconductor device are disclosed. The method and system include providing at least...
7646153 Switching regulator  
The present invention has an object to provide a switching regulator power supply apparatus that realizes a plurality of light emitting amount outputs without increasing a total number of...
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...
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....
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...
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...
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...
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 electric...
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,...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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)...
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...
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...
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 (C5) specifically via a filament. Disconnection is performed...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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....