Investigation of alignment direction in wide view film and rubbing angle of twisted nematic liquid crystal display mode |
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| Authors: | Ji Ma Shawn Hurley Zhigang Zheng Bo Jin Deng-Ke Yang |
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| Institution: | 1. Liquid Crystal Institute, Kent State University , Kent, Ohio, 44242, USA;2. Technology Centre, Shanghai SVA-Optronics Co. Ltd , Shanghai, 200233, China ma@lci.kent.edu;4. Liquid Crystal Institute, Kent State University , Kent, Ohio, 44242, USA;5. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science , Changchun, 130033, China;6. Technology Centre, Shanghai SVA-Optronics Co. Ltd , Shanghai, 200233, China |
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| Abstract: | Wide view (WV) film is an important material in the polariser. It is a hybrid-aligned, discotic liquid crystal (DLC) on an alignment layer on the tri-acetyl cellulose film, which is used as compensation film in twisted nematic (TN) mode liquid crystal display (LCD). The relation between the alignment direction of the DLC in the WV film and the rubbing direction of the polyimide on the glass substrate in the TN mode LCD was investigated. The results indicated that the contrast ratio (CR) of the TN mode LCD can be increased by adjusting this angle . When an 88°?rubbing angle was used in this work, the CR of the TN mode LCD could reach 1000:1 and the horizontal and vertical viewing angles were 170 and 160°, respectively. |
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| Keywords: | wide view film contrast ratio alignment direction rubbing angle twisted nematic mode liquid crystal display |
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