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40.1: Distinguished Contributed Paper: Integrated Amorphous Silicon Color Sensor on LCD Panel for LED Backlight Feedback Control System
Author(s) -
Lee KiChan,
Park YunJae,
Ko Hyunseok,
Moon SeungHwan,
Park JinHyeok,
Berkeley Brian,
Kim SangSoo
Publication year - 2005
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2036262
Subject(s) - backlight , liquid crystal display , amorphous silicon , materials science , optoelectronics , flat panel , silicon , computer science , optics , computer graphics (images) , physics , crystalline silicon
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.