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28.1: Wide Pretilt Angle Control of Liquid Crystal Display Device by Ion Beam Exposure
Author(s) -
Seo JooHong,
Jang Hong Jeek,
Lee Seong Ryong,
Song Dong Han,
Yoon TaeHoon,
Kim Jae Chang,
Yi Mi Hye
Publication year - 2008
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3069678
Subject(s) - liquid crystal , birefringence , materials science , beam (structure) , ion beam , optics , ion , layer (electronics) , voltage , liquid crystal display , biasing , optoelectronics , threshold voltage , chemistry , nanotechnology , electrical engineering , physics , organic chemistry , engineering , transistor
Abstract The pretilt angle of nematic liquid crystals on an alignment layer can be controlled from 2 to 89° by ion beam treatment of the alignment layer. Ion beam is used to partially destroy the vertical functional molecules of the vertical alignment materials. We also apply this method to no‐bend‐bias‐voltage optically compensated birefringence (OCB) mode with a pretilt angle of 55°. The OCB cell made by our method is a good candidate for high quality OCB mode because of the merits of uniformity of ion beam alignment and low power consumption of no‐bend‐bias voltage.