Twisted nematic liquid crystal display device

Details Twisted nematic liquid crystal display device Twisted nematic liquid crystal display device

1989-11-13

1992-02-25

Hille, Rolf

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 94, 359 63, 359 77, 359 78, G02F 113

Patent

active

050917943

ABSTRACT:
The present invention relates to a normally dark twisted nematic liquid crystal display device. The device having an optical path length difference (.DELTA.nd) which is equal to the product of the thickness (d) of the liquid crystal layer and the double refraction index (.DELTA.n) of the liquid crystal layer. The display device is characterized in that the optical path length difference (.DELTA.nd) of the liquid crystal layer has a value such that 1.4 .mu.m.ltoreq..DELTA.nd.ltoreq.1.7 .mu.m.

REFERENCES:
patent: 4443065 (1984-04-01), Funada et al.
patent: 4527864 (1985-07-01), Dir
patent: 4664482 (1987-05-01), Kando et al.
patent: 4759612 (1988-07-01), Nakatsuka et al.
patent: 4906073 (1990-03-01), Hunahata et al.
patent: 4909605 (1990-03-01), Asano et al.
patent: 4930877 (1990-06-01), Kano et al.

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