New RGB Backlighting System for Liquid Crystal Display


Posted on Feb 6, 2014

utilize RGB LED lightsources, an optical sensor and feedback controller. The aim of using optical feedback is a color stability over temperature, maintaining constant brightness, and controlling any color point or brightness required by the LCDs. Within the article you will find section discuss about Main functional blocks of the backlighting syst


New RGB Backlighting System for Liquid Crystal Display
Click here to download the full size of the above Circuit.

ems, The understanding of xy coordinate and brightness y (colorimetry), Luxeon RGB lightsource, Typical LED performance in temperature/lifetime behaviour, LED output wavelength using pulse width modulation (PWM), the RGB backlighting system description (click figure to enlarge), Feedback controller (clipping, brightness, calibration), Photodiode sensor for averaging radiometric power, and Luxeon LED driver descriptions. See the capability of high performanceLED backlight systemfor LCDsusing optical feedback and luxeon lightsources for color controlling in the following LCD article (source: philipslumileds. com).




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