Liquid crystal display device with twist angle .phi. of 70.degre

Details Liquid crystal display device with twist angle .phi. of 70.degre Liquid crystal display device with twist angle .phi. of 70.degre

1994-10-11

1996-09-10

Gross, Anita Pellman

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 93, 359102, G02F 11335, G02F 113

Patent

active

055551130

ABSTRACT:
Picture inversion in display devices based on the twisted pneumatic effect is prevented by choosing a twist angle .phi.T such that 70.degree.<.phi.T<90.degree., and an angle .alpha. between the direction of polarization of one of the polarizers and the associated direction of orientation such that: 30.degree.+.phi.T/2<.alpha.<60.degree.+.phi.T/2.

REFERENCES:
patent: 4609255 (1986-09-01), Leenhouts et al.
patent: 4896947 (1990-01-01), Leenhouts
patent: 4952030 (1990-08-01), Nakagawa et al.
patent: 5105289 (1992-04-01), Sonehara et al.
patent: 5139340 (1992-08-01), Okumura
patent: 5150237 (1992-09-01), Iimura et al.

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