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P‐127: Multidomain Twisted Vertically Aligned Display by Microrubbing and its Simulations
Author(s) -
Varghese Soney,
Bastiaansen Cees W. M.,
Crawford Gregory P.,
Boer Dick K. G.,
Broer Dirk J.
Publication year - 2005
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 - 10.1889/1.2720327
Subject(s) - rubbing , homeotropic alignment , materials science , polyimide , liquid crystal display , viewing angle , liquid crystal , optics , pixel , contrast ratio , optoelectronics , surface (topology) , composite material , geometry , physics , layer (electronics) , mathematics
Abstract A microrubbing (μ‐rubbing) technique is used to create multidomain vertically aligned liquid crystal pixels for wide viewing angle liquid crystal display (LCD) applications. A metallic sphere of 1 mm diameter is used to rub a homeotropic polyimide surface to manipulate the local pretilt angle to create a four‐domain pixel configuration. We use μ‐rubbing to accurately control the surface pretilt angle of the liquid crystal from the normal, which directs the liquid crystal molecules to respective direction on applying a voltage. We report on the twisted vertically aligned (TVA) configurations showing symmetric isointensity curves, high contrast and attractive electro‐optic performance parameters. The viewing angle and electro‐optical characteristics are simulated and compared with the experimental results.