Light emitting device driver for driving light emitting...

Details Light emitting device driver for driving light emitting... Light emitting device driver for driving light emitting...

2007-04-17

2007-04-17

Tran, Huan (Department: 2861)

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C347S237000, C347S132000

Reexamination Certificate

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10904656

ABSTRACT:
An integrated circuit includes a light emitting device and a light emitting device driver coupled to the light emitting device. The light emitting device driver is for generating a drive signal to drive the light emitting device to emit light. A light emitting device driver includes a transistor having a first terminal coupled to a light emitting device; a resistor having a first terminal coupled to a second terminal of the transistor, and a second terminal coupled to a supply node; and a comparator having a first input terminal coupled to a reference voltage, a second input terminal coupled to the second terminal of the transistor, and an output terminal coupled to a control terminal of the transistor. The light emitting device driver controls an electrical current flowing through the transistor for driving the light emitting device to emit light.

REFERENCES:
patent: 6538394 (2003-03-01), Volk et al.
patent: 2004/0196221 (2004-10-01), Shih

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