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28.4: Late‐News Paper : Effects of Azimuthal Anchoring Energy on In‐Plane Switching Mode LCD
Author(s) -
Lee Woo Keun,
Park Hyun Jin,
Lim Eun Jung,
Shin Dong Cheon,
Kim Dong Guk,
Woo Joung Won,
Shin Hyun Ho
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 - 10.1889/1.3069681
Subject(s) - anchoring , azimuth , liquid crystal display , liquid crystal , mode (computer interface) , stability (learning theory) , materials science , layer (electronics) , order (exchange) , optoelectronics , optics , energy (signal processing) , plane (geometry) , physics , computer science , composite material , structural engineering , geometry , engineering , quantum mechanics , mathematics , machine learning , operating system , finance , economics
The azimuthal anchoring energies (A.A.E.) of rubbed and UV‐exposed polyimides (PIs) alignment layers were measured more precisely by using improved optical measurement systems and modified cell configurations, and their effects on the alignment stabilities and liquid crystal (LC) response properties in an IPS‐mode LCD were studied. It is proved that (1) the relatively high A.A.E. is necessary for the alignment stability under high temperature stresses, and (2) the falling time of LC becomes shorter by about 0.7 ms with one order increase of an A.A.E. value. So we propose that the A.A.E. level of 1 × 10 −2 ∼ 5 × 10 −2 J/m 2 is required for an alignment layer in an IPS‐mode LCD in order to guarantee the alignment stability and LC response property.