Patent ID: 8134304
Filing Date: 2012-03-13
Classification: H05B,Y02B

Abstract:
1. A light source driving device capable of dynamically keeping constant current sink for driving a light emitting component, the light source driving device comprising: a voltage converter, coupled to the light emitting component, for converting an input voltage into an output driving voltage according to a voltage control signal; a dimming unit, coupled to the light emitting component, for performing a dimming process according to a dimming signal; a current source, coupled to the dimming unit, for providing a driving current to drive the light emitting component; and a control unit, coupled to the dimming unit and the voltage converter, for detecting a dimming state to generate a dimming detection signal and generating a reference voltage according to the dimming detection signal; wherein the control unit controls the voltage converter to generate the output driving voltage so as to drive the light emitting component.