Two-domain twisted nematic and tilted homeotropic liquid crystal displays for active matrix applications

Author

Yang, K.H.

Author_Institution

IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA

fYear

1991

fDate

15-17 Oct. 1991

Firstpage

68

Lastpage

72

Abstract

To overcome the viewing-angle dependence of TN (twisted nematic) cells, the author has investigated two-domain TN (TDTN) and two-domain tilted homeotropic (TDTH) cells with optical compensation for active matrix applications. The simulated and experimental results for TDTN show a large viewing zone of +or-40 degrees in the vertical and +or-60 degrees in the horizontal directions with excellent grayscale fidelity. TDTN has been fabricated using multiple rubbings and one masking operation. Simulated results for compensated single-domain TH and TDTH are also reported. TDTH cells have been fabricated using a total of four oblique evaporations and one mask. The width of the disclination line between the two domains of TDTN or TDTH cells is discussed.<>

Keywords

liquid crystal displays; nematic liquid crystals; active matrix applications; disclination line; large viewing zone; masking operation; multiple rubbings; oblique evaporations; optical compensation; tilted homeotropic liquid crystal displays; twisted nematic LCD; two-domain LCD; viewing-angle dependence; Active matrix liquid crystal displays; Brightness; Computer displays; Flat panel displays; Gray-scale; Impurities; Liquid crystal displays; Manufacturing; Optical films; Thin film transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Display Research Conference, 1991., Conference Record of the 1991 International

Conference_Location

San Diego, CA, USA

Print_ISBN

0-7803-0213-3

Type

conf

DOI

10.1109/DISPL.1991.167435

Filename

167435