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Proceedings Paper

Photoalignment control of LC and its applications to LCD fabrication
Author(s): Yasufumi Iimura; Hidemari Akiyama; Xiang Tong Li; Shunsuke Kobayashi
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Paper Abstract

The photopolymer materials of poly(vinyl cinnamate) (PVCi) and polyimides showing homeotropic liquid crystal (LC) alignment have been used to control LC alignment on these films using linearly-polarized (LP)- UV exposure, and the LC alignment mechanism including pretilt angle generation on the films has been discussed. In the case of PVCi, an important contribution of non-dimerized side chains of PVCi molecules to the LC alignment is pointed out. On the other hand, LC alignment on homeotropically alignment polymer films exposed to LP-UV light is shown to be determined through the interaction of LC with alkyl branches attached to the polymer. It is also shown that the photo-alignment method using these photopolymer materials are very promising technique for the fabrication of some attractive LCD modes such as in-plane switching and vertically-aligned display modes, and an example of the application of the photo-alignment method to the fabrication of in-plane switching device is presented.

Paper Details

Date Published: 1 April 1998
PDF: 11 pages
Proc. SPIE 3297, Liquid Crystal Materials, Devices, and Applications VI, (1 April 1998); doi: 10.1117/12.304538
Show Author Affiliations
Yasufumi Iimura, Tokyo Univ. of Agriculture and Technology (Japan)
Hidemari Akiyama, Tokyo Univ. of Agriculture and Technology (Japan)
Xiang Tong Li, Tokyo Univ. of Agriculture and Technology (Japan)
Shunsuke Kobayashi, Science Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 3297:
Liquid Crystal Materials, Devices, and Applications VI
Ranganathan Shashidhar, Editor(s)

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