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47.1: Photo‐Polymerized Discotic Films for Viewing Quality Improvement of Liquid Crystal Displays
Author(s) -
Sergan T.,
Sonpatki M.,
Kelly J.,
Chien L.C.
Publication year - 2000
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 - 10.1889/1.1832854
Subject(s) - homeotropic alignment , discotic liquid crystal , materials science , planar , yield (engineering) , liquid crystal , optoelectronics , fabrication , optics , polymerization , crystallography , polymer , composite material , chemistry , medicine , computer graphics (images) , alternative medicine , physics , pathology , computer science
We studied the alignment of discotic molecules induced by several types of alignment layers and found the conditions for the formation of negative uniaxial films and layers with twisted optic axis. The most commonly used alignment layers such as conventional rubbed polyimides and polyvinylalcohol films yield splayed optic axis in discotic films. Fluorinated polyimides induce planar alignment of the optic axis (negative A‐plate). High concentrations of photo‐initiator induce molecular reorientation and produce an effective homeotropic alignment (negative C‐plate). Using a discotic compound with chiral centers in fabrication of planar structures, we obtained films with twisted optic axis.