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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:
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Patent Number Title Of Patent Date Issued
7986111 Electronic ballast control circuit Jul. 26, 2011
7986110 Light source driving device Jul. 26, 2011
7986108 LED driver and start-up feedback circuit therein Jul. 26, 2011
7986106 Protection circuit and discharge lamp driving device employing the same Jul. 26, 2011
7986103 Method for driving a lamp in a lighting system based on a goal energizing level of the lamp and a control apparatus therefor Jul. 26, 2011
7982413 Electronic ballast with dimming control from power line sensing Jul. 19, 2011
7982411 Ignition and operation of electronic high intensity discharge lamps Jul. 19, 2011
7982405 Igniter circuit for an HID lamp Jul. 19, 2011
7977891 LED driving circuit Jul. 12, 2011
7977890 Direct current power supply device, power supply device for driving LED and semiconductor integrated circuit for controlling power supply Jul. 12, 2011
7977889 Direct-current power supply device, power supply device for driving LED and semiconductor integrated circuit for driving power supply Jul. 12, 2011
7973494 Electronic ballast with step up/down power factor correction DC-DC converter suitable for high input voltage applications Jul. 5, 2011
7973493 Discharge lamp lighting device, and illuminating device Jul. 5, 2011
7973488 Constant current driver circuit with voltage compensated current sense mirror Jul. 5, 2011
7973487 Power supply circuit Jul. 5, 2011
7968822 Arc welding system Jun. 28, 2011
7965046 Full-bridge and half-bridge compatible driver timing schedule for direct drive backlight system Jun. 21, 2011
7964988 Lighting controller of lighting device for vehicle Jun. 21, 2011
7960923 High pressure discharge lamp lighting apparatus Jun. 14, 2011
7960919 Illumination apparatus and image display apparatus Jun. 14, 2011
7956554 System and method for regulation of solid state lighting Jun. 7, 2011
7956550 Complementary application specific integrated circuit for compact fluorescent lamps Jun. 7, 2011
7956548 Electronic ballast protection Jun. 7, 2011
7952301 Auto-dimming apparatus for controlling power delivered to a load May. 31, 2011
7952299 Control circuit and method for self-exciting capacitor charging circuit May. 31, 2011
7952298 Split phase inverters for CCFL backlight system May. 31, 2011
7952296 Feedback circuit for DC/AC inverter May. 31, 2011
7952295 Illuminating device May. 31, 2011
7952294 Apparatus, system and method for cascaded power conversion May. 31, 2011
7948187 Electronically controlling acoustic energy from piezoelectric transformers May. 24, 2011
7944156 Electronic ballast for high intensity discharge lamps May. 17, 2011
7944154 Fluorescent tube power supply and backlight May. 17, 2011
7944153 Constant current light emitting diode (LED) driver circuit and method May. 17, 2011
7944151 Frequency modulation method and device for high intensity discharge lamp May. 17, 2011
7944150 Discharge lamp lighting apparatus and projector May. 17, 2011
7944149 Starting an electronic ballast May. 17, 2011
7936130 Discharge lamp lighting apparatus May. 3, 2011
7932681 LED lighting device and LCD device using the same Apr. 26, 2011
7928665 System and methods for dimming a high pressure arc lamp Apr. 19, 2011
7924064 Inverter circuit Apr. 12, 2011
7923942 Constant current source mirror tank dimmable ballast for high impedance lamps Apr. 12, 2011
7923941 Low cost compact size single stage high power factor circuit for discharge lamps Apr. 12, 2011
7923940 Discharge lamp lighting device and projector Apr. 12, 2011
7923939 Mixed mode control for dimmable fluorescent lamp Apr. 12, 2011
7923938 System and method for providing inductive power to improve product marking and advertising Apr. 12, 2011
7923934 Battery-powered fluorescent lamp Apr. 12, 2011
7919931 LED driving circuit, illuminating device, and electro-optical device Apr. 5, 2011
7919927 Circuit having EMI and current leakage to ground control circuit Apr. 5, 2011
7915896 Identification of a defective filament in a fluorescent lamp Mar. 29, 2011
7915835 Imaging apparatus, strobe device, and charging-control method Mar. 29, 2011

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