Double TN cell LCD display with different Gooch and Tarry extrem

Details Double TN cell LCD display with different Gooch and Tarry extrem Double TN cell LCD display with different Gooch and Tarry extrem

1992-09-02

1994-02-15

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 53, 359102, G02F 1133, G02F 11335, G02F 113

Patent

active

052872076

ABSTRACT:
In a double cell the values of d..DELTA.n for both the actual cell (10) and the compensation cell (20) having opposite twist angles .phi. are chosen to be such that they are associated with different Gooch & Tarry extrema for a given wavelength. The compensation cell may then be thicker and can be obtained in a simpler manner. A universal compensation cell may alternatively be used.

REFERENCES:
patent: 4408839 (1983-10-01), Wiener-Avnear
patent: 4443065 (1984-04-01), Funada et al.
patent: 4936654 (1990-06-01), Suzuki et al.
patent: 5091794 (1992-02-01), Suzuki
patent: 5107356 (1992-04-01), Castleberry
patent: 5119216 (1992-06-01), Wada et al.
patent: 5142393 (1992-08-01), Okumura et al.
patent: 5150237 (1992-09-01), Iimura et al.
patent: 5157523 (1992-10-01), Yamagishi
Gooch & Tarry J. Phys. D: Appl. Phys. vol. 8, 1975, 1575-84.
E. P. Raynes, Mol. Cryst. Liq. Cryst. Lett. 4, 69 (1987).

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