Control and elimination of disclinations in twisted nematic liquid-crystal displays

1 July 1977

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Electron Devices

Vol. 24 (7), 811-815
https://doi.org/10.1109/t-ed.1977.18835

Abstract

A method for controlling and eliminating reverse-twist and reverse-tilt disclinations in twisted nematic cells without using cholesterics has been developed both theoretically and experimentally. Pretilt angle and tilting direction as well as twist angle and sense have been correlated with the appearance of disclinations. It is shown that for practical twisted nematic cells having a special sense of pretilt, the disclination free cells are realized by adopting the pretilt angle of 1°-5° and the twist angle of 80°-85°.

Keywords

TWISTED NEMATIC
DISCLINATIONS
REVERSE
EXPERIMENTALLY
CHOLESTERICS
CRYSTAL
THEORETICALLY
SPECIAL

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