Light emitting diode driver circuit and method

Details Light emitting diode driver circuit and method Light emitting diode driver circuit and method

2006-03-21

2006-03-21

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C323S222000, C327S514000

Reexamination Certificate

active

07015654

ABSTRACT:
A mirco-controller and boost converter circuit provide constant current to light emitting diode array. A micro-controller operatively coupled with a semiconductor switch and the boost converter circuit measure the ability of a DC power supply to change the inductor. Duty cycles of the semiconductor switch are modified according to the measurement so as to supply substantially constant current to the LED array through an inductor regardless of actual battery voltage.

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