Princeton Technology Corporation

Mean-Sea Tsay

Ming-Yuan Tsao

Chiung-Hung Chen

Shih-Chou Kuo

An LED driving device has a first constant current source circuit and a voltage control circuit. The first constant current source outputs a first constant current to a first node and the first constant current flows into a first LED module disposed between a driving node and the first node; wherein, the first constant current source circuit has a first detection node for generating a first detection signal in response to the voltage level of the first node. The voltage control circuit is coupled to the first detection node, for outputting a control signal in response to the first detection signal to a voltage regulator circuit in order to control and modulate the voltage regulator circuit to output a driving voltage to the driving node.

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Taipei, Taiwan

Mean-Sea Tsay