Comparison of optical compensations based on discotic liquid crystals with linear and non-linear orientation for wide viewing angle twisted nematic liquid crystal displays

被引：18

作者：

Hwang, Seong Han

Lim, Young Jin

Lee, Myong-Hoon

Lee, Seung Hee ^{[1
]}

Lee, Gi-Dong

Kang, Hoon

Kim, Kyeong Jin

Choi, Hyun Chul

机构：

[1] Chonbuk Natl Univ, Res Ctr Adv Mat Dev, Polymer BIN Fus Res Team BK 21, Chonju 561756, Chonbuk, South Korea

[2] Dona A Univ, Dept Elect Engn, Pusan 607735, South Korea

[3] LG Philips LCD, Kumi 730726, Kyungbook, South Korea

来源：

CURRENT APPLIED PHYSICS | 2007年 / 7卷 / 06期

关键词：

optical compensation; twisted nematic; liquid crystal; discotic; NEGATIVE BIREFRINGENCE; FILM; DRIVEN;

D O I：

10.1016/j.cap.2007.03.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Optical compensation film using discotic liquid crystals has been commercialized to suppress light leakage of twisted nematic (TN) liquid crystal (LC) cells in the dark state when the viewing directions are off-axes. In the conventional film, the tilt angle variation of the discotic LC layers is linear, whereas that of the rod-like LC layers in the TN cell is non-linear with twist alignment. We investigated the optical compensation effects in terms of iso-contrast ratio, gray scale inversion and color shift with linear and non-linear orientation in a tilt angle or twist and non-twist orientation on TN-LC cells. The results showed that the optical compensation with non-linear orientation exhibited an improved performance in suppressing light leakage in the dark state. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：690 / 696

页数：7

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