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Proceedings Paper

Full-color reflective-type TFT-LCD
Author(s): Dai-Liang Ting; Chieh-Li Chen; Chen-Lung Kuo; Chung-Kuang Wei; Chung-Yuan Liu; Yong-Hong Lu; Hsueh-Feng Shih; Chia-Wei Hao; Shin-Tson Wu
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Paper Abstract

A high performance reflective-type liquid crystal display (LCD) has been developed. This display utilizes a single polarizer and an inner reflector which eliminates the parallax problem as encountered by the conventional reflective TN LCD. A novel diffusive film is laminated between the polarizer and the LCD cell to overcome the narrow viewing angle caused by the specular reflector. Micro color filters were fabricated on the glass substrate to achieve full color representation. To obtain high contrast ratio and neutral color in gray shading, am mixed-mode twisted nematic LCD is used. The twist angle of the liquid- crystal layers has also been optimized to boost the brightness. Based on these technologies, we have developed a thin-film-transistor addressed reflective LCD panel. Excellent properties such as high contrast of 15:1, fast response of less than 15 ms, wide viewing angle of more than 40 degrees in all azimuthal directions, clear image of no parallax, and full-color capabilities are demonstrated. In addition, the advantageous features of low-power consumption and sunlight readability promise the potential application of this reflective display in future portable information tools, such as digital camera, personal digital assistant, and hand-held personal computer. Finally, preliminary results of a configuration with an inner-diffuser are discussed briefly.

Paper Details

Date Published: 17 June 1998
PDF: 7 pages
Proc. SPIE 3421, Display Technologies II, (17 June 1998); doi: 10.1117/12.311051
Show Author Affiliations
Dai-Liang Ting, Industrial Technology Research Institute (Taiwan)
Chieh-Li Chen, Industrial Technology Research Institute (Taiwan)
Chen-Lung Kuo, Chi Mei Optoelectric Corp. (Taiwan)
Chung-Kuang Wei, Industrial Technology Research Institute (Taiwan)
Chung-Yuan Liu, Industrial Technology Research Institute (Taiwan)
Yong-Hong Lu, Industrial Technology Research Institute (Taiwan)
Hsueh-Feng Shih, Industrial Technology Research Institute (Taiwan)
Chia-Wei Hao, Industrial Technology Research Institute (Taiwan)
Shin-Tson Wu, HRL Labs. (United States)

Published in SPIE Proceedings Vol. 3421:
Display Technologies II
Fang-Chen Luo; Shin-Tson Wu; Shunsuke Kobayashi, Editor(s)

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