Abstract
In this paper, we present the feasibility of an optical color sensing feedback system for an LED backlight by integrating the amorphous silicon color sensor onto the LCD panel. To improve the well-known photoconductivity degradation of amorphous silicon, a new LASER immersion treatment has been applied. The integrated color sensor optical feedback controlled LED backlighting system improved the color variation to less than 0.008 Δu‘v’ (CIE1976) compared with 0.025 for an open loop system over the temperature range of 42°C to 76°C.
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