Driving circuit and method for light emitting diode

Details Driving circuit and method for light emitting diode Driving circuit and method for light emitting diode

2011-08-16

2011-08-16

Choi, Jacob Y (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000

Reexamination Certificate

active

07999486

ABSTRACT:
A driving circuit for a light emitting diode (LED) and a method thereof are provided. The driving circuit includes a voltage converting circuit and a reference voltage generator. The reference voltage generator generates a reference voltage according to the cathode voltage of the LED. The voltage converting circuit automatically adjusts the driving voltage of the LED based on the reference voltage so as to reduce the possibility of unnecessary power wastage caused by high driving voltage.

REFERENCES:
patent: 7425803 (2008-09-01), Shao et al.
patent: 7880400 (2011-02-01), Zhou et al.
patent: 2008/0001547 (2008-01-01), Negru

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