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Studies of viewing-angle-switching display devices with all-direction-switching characteristic

In this study, a liquid crystal display (LCD) is proposed to have a capability of viewing-angle-switching in all directions. In the proposed LCD, a three-electrode structure is used to control the viewing angle of the LCD. By using a bi-direction slit type electrode, fringe fields with two different directions are generated. The fringe fields cause a light leakage of the dark state in all directions. Experimental results reveal that the proposed LCD has viewing angle within 40o in both vertical and horizontal directions when the area ratio of the vertical and horizontal slit is 1:1. Furthermore, contrast ratio (CR) of the proposed LCD increases as cell gap increases. When the angle between polarizer axis and LC is 0, the proposed LCD has the highest CR in the normal direction. The personal privacy is protected based on the proposed LCD due to the all-direction light leakage in the dark state.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0905111-125909
Date05 September 2011
CreatorsChung, Chia-Hung
ContributorsChie-Tong Kuo, Chi-Huang Lin, Chi-yan huang
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0905111-125909
Rightsuser_define, Copyright information available at source archive

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