A high efficiency power controller comprising of a driver circuit to convert to direct current (DC) voltage from alternating current (AC) voltage is used for drive solid state lighting (SSL) including light emitting diode (LED) and organic light emitting diode (OLED). The driver circuit is comprises of an AC-DC limited current unit, sensor processor, signal generator, feedback controller and SSL lamp module, which converts the AC supply voltage to a DC voltage by using a negative feedback current and voltage limiting circuit for powering SSL. The invented driver circuit operates at high efficiency with low power consumption. The current and voltage feedback circuit mode from current, voltage, light intensity and thermal temperature for SSL possesses reliable DC power driver without any flash during lighting.

 
Web www.patentalert.com

< Image sensor having plural pixels adjacent to each other in a thickness direction and method for manufacturing the same

> Data demodulation using an asynchronous clock

> Method and system for communicating with and tracking RFID transponders

~ 00564