單間隙穿反式液晶顯示器光學補償之設計

Optical Compensation Design on Single Cell Gap Transflective LCDs

張明輝(Ming-Hui Chang)

指導教授 ： 徐芝珊

中原大學/理學院/應用物理研究所/碩士(2007年)

https://doi.org/10.6840/CYCU.2007.00648

摘要

摘要
單間隙穿反式液晶顯示器（single-cell-gap transflective liquid crystal displays）是近幾年為了改善雙間隙構造（dual-cell-gap）在製程上的複雜性而發展。單間隙穿反技術日新月異，大多數都是使用電控雙折射（Electrically controlled birefringence; ECB）的方式，讓穿透區與反射區的電光特性一致。
在本篇論文中，我們使用特殊的反射區電極構造，此類型電極可使穿透區與反射區擁有不同的電壓，藉此設計出在兩區域使用相同配向模態的單間隙穿反式液晶顯示器，經由模擬補償結果，其歸一化後的穿透率對電壓曲線與反射率對電壓曲線可接近重合，因此只需使用同一驅動電路，便能驅動穿透區與反射區。除此之外，我們也利用相位延遲補償方式，補償視角與對比，使穿透區與反射區能有更好的顯示品質。

關鍵字

補償膜 ； 半穿半反 ； 相位延遲 ； 液晶 ； 視角

並列摘要

Abstract
The development of the single-cell-gap transflective liquid crystal displays is for improving complicated manufacture of the dual-cell-gap transflective liquid crystal displays in recent years. There is more and new technology of the single-cell-gap in each day. Most of them the way of electrically controlled birefringence, and let transmissive area and reflective area have the same electrooptical characteristics.
In this thesis, we use the special electrode structure in reflective area. The special electrode design makes the transmissive area and reflective area have different voltage. We can design to use the same aligned mode of single-cell-gap transflective liquid crystal displays in these two areas. Simulated results show the normalized transmittance-voltage and reflection-voltage curves overlap closely. It can be controlled with the same device. In addition, using the compensation method of phase retardation compensate for the viewing angle and the contrast. Then the better image quality can be appeared in the transmissive area and reflective area.

並列關鍵字

liquid crystal ； transflective ； compensation film ； phase retardation ； viewing angle

參考文獻

[1] Xinyu Zhu, Zhibing Ge, Thomas X. Wu, and Shin-Tson Wu, “TransflectiveLiquid Crystal Displays,” IEEE, 1, pp. 15−29 (2005).

[2] Han-Ping David Shieh, Yi-Pai Huang, Mu-Jen Su, and Shin-Tson Wu,“Single Cell-Gap Transflective Color TFT-LCD by using Image-Enhanced Reflector,” IEEE, 3, pp. 270−272 (2003) .

[3] Chiu-Lien Yang,“Electro-Optics of a Transflective Liquid Crystal Display with Hybrid-Aligned Liquid Crystal Texture,” Jpn. J. Appl. Phys. 43, pp. 4273−4275 (2004).

[4] Tae Bong Jung, Je Hoon Song, Dae-Shik Seo and Seung Hee Lee,“Viewing Angle Characteristics of Transflective Display in a Homogeneously Aligned Liquid Crystal Cell Driven by Fringe-Field,” Jpn. J. Appl. Phys. 43, pp. 1211−1213 (2004).

[5] Minoru Shibazaki, Yusei Ukawa, Satoru Takahashi, Yoshihito lefuji and Takanobu Nakagawa,“Transflective LCD with Low Driving and Voltage and Wide Viewing Angle,” SID’03 Digest, pp. 90−93 (2003).