Circuit for driving light source

Details Circuit for driving light source Circuit for driving light source

2008-04-22

2011-10-11

Vu, David Hung (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S192000, C315S193000, C315S307000, C315S308000

Reexamination Certificate

active

08035310

ABSTRACT:
A light source driving circuit including a driving module, a plurality of first switches, a detecting unit, and a control unit is provided. The plurality of first switches is respectively coupled to corresponding light sources and these light sources are driven by the driving module. The detecting unit is coupled to the driving module to detect a working parameter of each light source and transmit the working parameter to the control unit. When the detecting unit detects some of these light sources are broken down, the control unit sequentially turns on the first switches to find out the failed light source. Moreover, the first switch coupled to the failed light source is remained on, and the driving signal is regulated according to the number of the failed light source, such that the brightness of the panel does not decrease.

REFERENCES:
patent: 6351079 (2002-02-01), Willis
patent: 2006/0082332 (2006-04-01), Ito et al.
patent: 2010/0072922 (2010-03-01), Szczeszynski et al.
patent: 2002343587 (2002-11-01), None

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