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Class Information
Number: 315/224
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit > Impedance or current regulator in the supply circuit
Description: Systems having an impedance or a current or voltage regulator connected in the supply circuit of the load device.

Patents under this class:

Patent Number Title Of Patent Date Issued
8711444 Light-source control device, light-source control method, image reading device, and image forming apparatus Apr. 29, 2014
8710766 LED driving circuit, LED illumination appliance, LED illuminator, and LED illumination system Apr. 29, 2014
8710761 Circuit arrangement for a piezo transformer, and method therefor Apr. 29, 2014
8710758 Dimmer system and damper circuit thereof Apr. 29, 2014
8710757 Power converter for an LED assembly and lighting application Apr. 29, 2014
8710748 Illumination apparatus Apr. 29, 2014
8704461 Vehicle lighting device Apr. 22, 2014
8704460 LED current control in a dimmable LED illumination system Apr. 22, 2014
8692473 Portable lighting device Apr. 8, 2014
8692471 LED driving system and method Apr. 8, 2014
8686666 Method and device for remote sensing and control of LED lights Apr. 1, 2014
8686659 Multiple lamp lighting level ballast for series connected lamps Apr. 1, 2014
8680782 Light-emitting diode driving apparatus Mar. 25, 2014
8680776 Lighting device including a fast start circuit for regulating power supply to a PFC controller Mar. 25, 2014
8674617 Multiple light level electronic power converter Mar. 18, 2014
8674616 Distributed illumination system Mar. 18, 2014
8669721 Solid state light source based lighting device and lighting system Mar. 11, 2014
8664895 Circuits and methods for driving light sources Mar. 4, 2014
8664892 Light emitting diode system Mar. 4, 2014
8664880 Ballast/line detection circuit for fluorescent replacement lamps Mar. 4, 2014
8664875 LED control circuit with auto on/off function Mar. 4, 2014
8664874 Backlight unit and apparatus and method for controlling LED driving circuit Mar. 4, 2014
8664873 Operating circuit for light-emitting diodes Mar. 4, 2014
8664872 Circuit arrangement for operating a discharge lamp Mar. 4, 2014
8664868 Image processing circuit and light illumination module Mar. 4, 2014
8659537 Backlight unit and display device Feb. 25, 2014
8659240 Filament detection circuit Feb. 25, 2014
8659239 Circuit and method for providing absolute information for floating grounded integrated circuit Feb. 25, 2014
8659232 Variable-impedance load for LED lamps Feb. 25, 2014
8654111 Pixel circuit and display apparatus Feb. 18, 2014
8653756 Electronic circuits for driving series connected light emitting diode strings Feb. 18, 2014
8653755 Lighting apparatus and illuminating fixture with the same Feb. 18, 2014
8653753 Projection-type image display apparatus, lighting apparatus and lighting method realizing an extended lifetime Feb. 18, 2014
8653744 Driving circuit for LCD backlight source Feb. 18, 2014
8653743 Switching power supply device and lighting apparatus Feb. 18, 2014
8653742 Control circuit of switching power supply for driving light emitting elements, and light emitting device and electronic apparatus using the same Feb. 18, 2014
8653739 Circuit for operating light emitting diodes (LEDs) Feb. 18, 2014
8648543 Illumination driving circuit Feb. 11, 2014
8643300 Power control system and method for providing an optimal power level to a designated light fixture Feb. 4, 2014
8643298 Illumination device including LEDs and a switching power control system Feb. 4, 2014
8643297 Control circuit and control method for dimming LED lighting circuit Feb. 4, 2014
8643295 Luminaire Feb. 4, 2014
8643294 Single stage electronic ballast with power factor correction Feb. 4, 2014
8643284 LED assembly driving circuit Feb. 4, 2014
8638051 DC-DC converter and driving device of light source for display device using the same Jan. 28, 2014
8633656 Driving circuit and driving method of backlight module of display apparatus Jan. 21, 2014
8633654 Light source driving apparatus Jan. 21, 2014
8633652 Temperature-stabilized current regulation driver Jan. 21, 2014
8624517 LED dimming drive device, method and LCD Jan. 7, 2014
8624516 Power supply apparatus for light emitting diode Jan. 7, 2014

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