SYSTEM AND METHOD FOR LED BACKLIGHT DRIVER FOR LCD PANELS
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United States of America Patent
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Issued Date -
Sep 22, 2011
app pub date -
Apr 23, 2010
filing date -
Mar 17, 2010
priority date (Note) -
Abandoned
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Abstract
A power supply control system for driving light-emitting diode (LED) loads includes a first power switch for coupling to a voltage source, and a plurality of second power switches, each of which is configured for coupling to one of a corresponding plurality of LED loads. Each of the LED loads can include multiple light-emitting diodes (LEDs) connected in series. The power supply control system also includes an integrated circuit controller that includes a voltage controller configured to control the first power switch to provide an output voltage to each of the LED loads, and a current controller configured for coupling to each of the plurality of second power switches to provide a current through each of the LED loads. The integrated circuit controller is provided in a low-voltage integrated circuit chip, and the first power switch and the plurality of second power switches are high-voltage devices external to the low-voltage integrated circuit chip.
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