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Proceedings Paper

Photoanisotropic films: physics and applications in LCDs
Author(s): Vladimir G. Chigrinov; Vladimir M. Kozenkov
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Paper Abstract

Pure dye layers, dyes embedded into polymer matrix and pure photopolymer films (e.g. PVC- polyvinyl 4-methoxy-cinnamate) form the so called Photoanisotropic Films (PAFs), which undergo molecular and structural transformations under the action of the external polarized UV-illumination. The spectral sensitivity, spatial resolution, thermostability and reversibility of such processes strongly depend on the chemical nature of PAFs. Various applications of PAFs in LCD technology are envisaged such as: (1) the alignment of LC molecules without rubbing operation thus avoiding electrostatic charges and impurities; (2) possibility to make delicate structure of the preferred azimuth of LC director on the substrate to improve LCD viewing angles; (3) forming of phase retardation plates with local orientations of optical axes and optical path length varying from pixel to pixel; (4) implementation of B/W and color supertwist high information content displays based on birefringent colors; and (5) modification of the configuration of subtractive color supertwist cells for projection displays. The paper presents a brief introduction of physical phenomena in PAFs and its application in LCDs.

Paper Details

Date Published: 7 April 1995
PDF: 12 pages
Proc. SPIE 2407, Projection Displays, (7 April 1995); doi: 10.1117/12.205891
Show Author Affiliations
Vladimir G. Chigrinov, Organic Intermediates & Dyes Institute (Russia)
Vladimir M. Kozenkov, Organic Intermediates & Dyes Institute (Russia)

Published in SPIE Proceedings Vol. 2407:
Projection Displays
Ming Hsien Wu, Editor(s)

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