LED driving circuit, illuminating device, and...

Details LED driving circuit, illuminating device, and... LED driving circuit, illuminating device, and...

2011-04-05

2011-04-05

Choi, Jacob Y (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S224000, C315S312000, C345S102000, C345S082000

Reexamination Certificate

active

07919931

ABSTRACT:
An LED driving circuit for driving a plurality of different LEDs includes: a first power supply circuit that is supplied with an input voltage for generating a plurality of driving voltages and a reference voltage with respect to the input voltage and generates a first output voltage and a second output voltage from the input voltage, on the basis of a first control signal; and a second power supply circuit that is supplied with the first output voltage, the second output voltage, and the reference voltage, selects a voltage for driving the LEDs, on the basis of a second control signal, and outputs them.

REFERENCES:
patent: 7535441 (2009-05-01), Smith et al.
patent: 2003/0151577 (2003-08-01), Morita
patent: 2004/0095340 (2004-05-01), Nakamura
patent: 2006/0071614 (2006-04-01), Tripathi et al.
patent: 01147912 (1989-06-01), None
patent: 2003-215534 (2003-07-01), None

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