Full-color reflective-type TFT-LCD

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

doi:10.1117/12.311051

17 June 1998 Full-color reflective-type TFT-LCD

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

Author Affiliations +

Proceedings Volume 3421, Display Technologies II; (1998) https://doi.org/10.1117/12.311051
Event: Asia Pacific Symposium on Optoelectronics '98, 1998, Taipei, Taiwan

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.

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Dai-Liang Ting, Chieh-Li Chen, Chen-Lung Kuo, Chung-Kuang Wei, Chung-Yuan Liu, Yong-Hong Lu, Hsueh-Feng Shih, Chia-Wei Hao, and Shin-Tson Wu "Full-color reflective-type TFT-LCD", Proc. SPIE 3421, Display Technologies II, (17 June 1998); https://doi.org/10.1117/12.311051

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