Circuits and methods for controlling LCD backlights

Details Circuits and methods for controlling LCD backlights Circuits and methods for controlling LCD backlights

2008-12-31

2011-10-25

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S312000

Reexamination Certificate

active

08044609

ABSTRACT:
A circuit for controlling light sources comprises a converter, a feedback circuit and a current distribution controller. The converter is operable for converting an input voltage to an output current and for providing the output current to the light sources. The feedback circuit is coupled to the light sources for generating feedback signals indicative of currents flowing through the light sources respectively. The current distribution controller is coupled to the feedback circuit for generating control signals based on the feedback signals respectively so as to regulate the currents of the light sources respectively, and for controlling the converter to regulate the output current based on the feedback signals.

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