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Proceedings Paper

Color filter-less technology of LED back light for LCD-TV
Author(s): Manning Fan; Meng Liang; Debo Guo; Fuhua Yang; Liangchen Wang; Guohong Wang; Jinmin Li
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Paper Abstract

Back Light Unit (BLU) and Color Filter are the two key components for the perfect color display of Liquid Crystal Display (LCD) device. LCD can not light actively itself, so a form of illumination, Back Light Unit is needed for its display. The color filter which consists of RGB primary colors, is used to generate three basic colors for LCD display. Traditional CCFL back light source has several disadvantages, while LED back light technology makes LCD obtain quite higher display quality than the CCFL back light. LCD device based on LED back light owns promoted efficiency of display. Moreover it can generate color gamut above 100% of the NTSC specification. Especially, we put forward an idea of Color Filter-Less technology that we design a film which is patterned of red and green emitting phosphors, then make it be excited by a blue light LED panel we fabricate, for its special emitting mechanism, this film can emit RGB basic color, therefore replace the color filter of LCD device. This frame typically benefits for lighting uniformity and provide pretty high light utilization ratio. Also simplifies back light structure thus cut down the expenses.

Paper Details

Date Published: 4 January 2008
PDF: 7 pages
Proc. SPIE 6841, Solid State Lighting and Solar Energy Technologies, 68410G (4 January 2008); doi: 10.1117/12.760045
Show Author Affiliations
Manning Fan, Institute of Semiconductors (China)
Meng Liang, Institute of Semiconductors (China)
Debo Guo, Institute of Semiconductors (China)
Fuhua Yang, Institute of Semiconductors (China)
Liangchen Wang, Institute of Semiconductors (China)
Guohong Wang, Institute of Semiconductors (China)
Jinmin Li, Institute of Semiconductors (China)

Published in SPIE Proceedings Vol. 6841:
Solid State Lighting and Solar Energy Technologies
Jinmin Li; Ling Wu; Yubo Fan; Yong-Hang Zhang; Michael E. Coltrin; Yuwen Zhao; Nuofu Chen; Vladimir M. Andreev; Jai Singh, Editor(s)

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