LED backlight controller

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9418611
APP PUB NO 20120182209A1
SERIAL NO

13154298

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The line banding image artifact that results from the interaction of LCD ripple and LED flicker in an LCD device that utilizes LED backlighting strings is substantially reduced by selecting a number of LED strings, individually driving the number of LED strings with a corresponding number of identical clock signals that are equally phase delayed, and selecting the frequency of the clock signals so that the product of the frequency of the clock signal multiplied by the number of LED strings is equal to the line clock frequency.

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Patent Owner(s)

Patent OwnerAddress
NATIONAL SEMICONDUCTOR CORPORATION2900 SEMICONDUCTOR DRIVE SANTA CLARA CA 95051

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Koskela, Tomi Juhani Sunnyvale, US 1 4
Loikkanen, Mikko Topi Oulu, FI 5 5
Tuikkanen, Tuomas Tapani Oulu, FI 2 4
Yaeger, Jeremy K Santa Clara, US 1 4

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