Patent ID: 7307614
Filing Date: 2007-12-11
Classification: H05B,Y02B

Abstract:
1. A light emitting diode (LED) driver boost converter system having a primary power source voltage and reference source voltage and comprising: pulse width modulating (PWM) means for electrically driving one or more chains of multiple chains of LEDs, said PWM means employing a first differential amplifier input having a first input connected to said decoding means and a second input, wherein said regulating means is connected to a second input of said differential amplifier and further comprises means for generating a reference current; and connected to said chains and said PWM means, decoding means for decoding logic signals representative of selecting one or more of said multiple chains; and connected to said PWM means and said decoding means, regulating means connected to a second input of said differential amplifier for regulating a reference current such that PWM output voltage for driving said chains of LEDs is automatically adjusted until current to the one or more of said multiple chains of LEDs selected is set to a desired threshold; said regulating means including means for generating a reference current, said means for generating said reference current comprising: