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P‐205: Late‐News Poster: LED Induced Vertical Alignment Surface for High Performance Liquid Crystal Displays
Author(s) -
Tseng Man-Chun,
Zhao Chen-Xiang,
Tang Shu-Tuen,
Yeung Fion Sze-Yan,
Kwok Hoi-Sing
Publication year - 2019
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 - 10.1002/sdtp.13302
Subject(s) - polyimide , materials science , liquid crystal display , liquid crystal , irradiation , optoelectronics , optics , polar , wavelength , viewing angle , layer (electronics) , composite material , physics , astronomy , nuclear physics
Photoalignment is one of the best candidates of the proven market for multi domain display. It allows nearly free pattern to the liquid crystal alignment direction compared to the conventional rubbed polyimide. Most of the available photoalignment materials require polarized deep UV irradiation with a finite dosage. With the consideration of the current limitation with such a small working window, a vertical photoalignment surface by non‐polarized LED light irradiation with large wavelength is proposed and demonstrated. The alignment direction of proposed surface is generated by the inclined non‐polarized light. The measurement results show the alignment properties of this proposed alignment surface are comparable to conventional polyimide. It has stable and uniform pretilt angle, high polar anchoring energy and fast response time. As a result, the proposed alignment layer is robust and especially suitable for large‐area liquid crystal displays which require high performance with stable pretilt angles and multi‐domain purposes.