Apparatus for driving LED arrays

Details Apparatus for driving LED arrays Apparatus for driving LED arrays

2007-04-05

2009-02-03

Vu, David Hung (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S246000, C315S247000, C315S312000

Reexamination Certificate

active

07486032

ABSTRACT:
In an apparatus for driving LED arrays, a dimming/size setter sets each of driving voltages for a plurality of red, green and blue LED arrays in response to at least one of a dimming signal and a size control signal inputted from outside. Each of red LED array driving circuits is commonly connected to the dimming/size setter, and switches on/off a supply voltage by PWM to supply the driving voltage set by the dimming/size setter. Each of green LED array driving circuits is commonly connected to the dimming/size setter, and switches on/off a supply voltage by PWM to supply the driving voltage set by the dimming/size setter. Also, each of blue LED array driving circuits is commonly connected to the dimming/size setter, and switches on/off a supply voltage by PWM to supply the driving voltage set by the dimming/size setter.

REFERENCES:
patent: 2002/0057061 (2002-05-01), Mueller et al.
patent: 2005/0168168 (2005-08-01), Elliott
patent: 2006/0082331 (2006-04-01), Ashdown
patent: 2007/0040512 (2007-02-01), Jungwirth et al.
patent: 2007/0080911 (2007-04-01), Liu et al.

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