Backlight control circuit with micro controller feeding...

Details Backlight control circuit with micro controller feeding... Backlight control circuit with micro controller feeding...

2008-01-28

2010-11-30

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S246000, C315S312000

Reexamination Certificate

active

07843151

ABSTRACT:
An exemplary backlight control circuit (200) includes at least one load circuit (210), a pulse width modulation integrated circuit (250), and a micro controller (260). The micro controller includes an output terminal and a plurality of analog to digital input terminals. The output terminal outputs a high level signal when the analog to digital input terminals all receive high level signals, and the output terminal outputs a low level signal when any one of the analog to digital input terminals receives a low level signal. The micro controller feeds operating states of the at least one load circuit back to the pulse width modulation integrated circuit.

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