Photoanisotropic films: physics and applications in LCDs

Vladimir G. Chigrinov; Vladimir M. Kozenkov

doi:10.1117/12.205891

7 April 1995 Photoanisotropic films: physics and applications in LCDs

Vladimir G. Chigrinov, Vladimir M. Kozenkov

Proceedings Volume 2407, Projection Displays; (1995) https://doi.org/10.1117/12.205891
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

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.

Citation Download Citation

Vladimir G. Chigrinov and Vladimir M. Kozenkov "Photoanisotropic films: physics and applications in LCDs", Proc. SPIE 2407, Projection Displays, (7 April 1995); https://doi.org/10.1117/12.205891

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