Wide-View and Broadband Circular Polarizers for Transflective Liquid Crystal Displays

Author

Ge, Zhibing ; Jiao, Meizi ; Lu, Ruibo ; Wu, Thomas X. ; Wu, Shin-Tson ; Li, Wang-Yang ; Wei, Chung-Kuang

Author_Institution

Coll. of Opt. & Photonics/CREOL, Univ. of Central Florida, Orlando, FL

Volume

4

Issue

2

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

129

Lastpage

138

Abstract

A simple wide-view and broadband circular polarizer comprising of a linear polarizer and two uniaxial films is proposed to enhance the viewing angle of transflective liquid crystal displays (LCDs). For the transmissive mode, over the entire 90deg viewing cone, the normalized light leakage from two stacked circular polarizers is suppressed to below 1.5times10^-2, and contrast ratio over 10:1 is obtained using a normally black vertically aligned transflective LCD. At the same time, this configuration warrants a broadband operation and reasonably good viewing angle (10:1 contrast ratio is over 40 at all directions) for the reflective mode. The physical mechanisms for achieving broadband operation and wide viewing angle are discussed.

Keywords

liquid crystal displays; optical films; optical polarisers; LCD; linear polarizer; normalized light leakage; stacked circular polarizers; transflective liquid crystal displays; transmissive mode; wide-view and broadband circular polarizers; Broadband; circular polarizer; liquid crystal display (LCD); transflective; wide-viewing angle;

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2008.920178

Filename

4472837