1980-11-13
1984-03-13
Arnold, Bruce Y.
350335, 350350R, G02F 113
Patent
active
044363796
ABSTRACT:
A twisted nematic liquid crystal display cell has two layers each containing a liquid crystal material. It is selected that the respective values of .DELTA.n.d, where .DELTA.n is the double refractive index of a liquid crystal layer and d is the thickness of a liquid crystal layer, deviate from each other, in connection with the two liquid crystal layers by about 5% to about 30%, more preferably, about 10% to about 20%. This leads to the advantage that coloration of transmission light owing to interference by double refraction is prevented.
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Scheffer, Terry J., "New Multicolor Liquid Crystal Displays That Use A Twisted Nematic Electro-Optic Cell," J. Applied Physics, vol. 44, No. 11 (Nov. 1973) pp. 4799-4803.
Shanks, I. A., "Electro-Optical Colour Effects by Twisted _Nematic Liquid Crystal," Electronics Letters, vol. 10, No. 7 (Apr. 14, 1974) pp. 90-91.
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Funada Fumiaki
Kozaki Syuichi
Matsuura Masataka
Wada Tomio
Arnold Bruce Y.
Gallivan Richard F.
Sharp Kabushiki Kaisha
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