Featured patents

Dim Mode Start for Electrodeless Lamp Ballast
US 08836240 B2, Sept. 16, 2014, Automatic regulation, Shashank Bakre et al. / OSRAM SYLVANIA Inc. (Danvers, US)
A ballast, comprising:…

Optimal Power Supply Topologies for Switched Current-Driven LEDs
US 08823284 B2, Sept. 2, 2014, Automatic regulation, Sukumar De et al. / Honeywell International Inc. (Morristown, US)
A LED driver circuit comprising:…

Failure Mitigation in Arrays of Light-Emitting Devices
US 08860318 B2, Oct. 14, 2014, Plural Series Connected Load Devices, Paul Jungwirth et al. / Cooledge Lighting Inc. (Burnaby, CA)
An illumination system comprising:…

Programmable Current Source With Optimized Compliance Region for Efficient Backlighting in Portable Applications
US 08860330 B1, Oct. 14, 2014, Automatic regulation, Rupert Howes / Dialog Semiconductor GmbH (Kirchheim/Teck-Nabern, DE)
A programmable current source circuit comprising:…

Method and Device for Driving an OLED Device
US 08749166 B2, June 10, 2014, Current Voltage Regulation, Coen Adrianus Verschuren / Koninklijke Philips N.V. (Eindhoven, NL)
Method for driving an organic light emitting diode (OLED), the OLED having…

LED Dimming Method and LED Dimming System
US 08686661 B2, April 1, 2014, Current Voltage Regulation, Fei Li / Shenzhen China Star Optoelectronics Technology Co., Ltd. (Shenzhen, CN)
An LED dimming method comprising the steps of:…

Circuit Arrangement and Method for Driving an Electrical Load
US 08659236 B2, Feb. 25, 2014, Current Voltage Regulation, Karl Georg Waser / AMS AG (Unterpremstaetten, AT)
A circuit arrangement for driving an electrical load, comprising:…

Method and Apparatus to Measure Light Intensity
US 08575845 B2, Nov. 5, 2013, Series connected load devices, Tobin D. Hagan et al. / Texas Instruments Incorporated (Dallas, US)
An apparatus comprising:…

Circuit Configuration and Method for Operating at Least One First and One Second LED
US 08547031 B2, Oct. 1, 2013, Impedance or current regulator in the supply circuit, Ralf Hying / OSRAM Gesellschaft mit beschraenkter Haftung (Munich, DE)
A circuit configuration for operating at least one first light emitting diode…

Multi-Channel LED Driver Circuit
US 08487550 B2, July 16, 2013, Automatic regulation, Qi Zhang et al. / Delta Electronics (Shanghai) Co., Ltd. (Shanghai, CN
A multi-channel light-emitting diode driver circuit for driving a plurality…

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