Ferroelectric liquid crystal display device having equalizing me

Details Ferroelectric liquid crystal display device having equalizing me Ferroelectric liquid crystal display device having equalizing me

1989-12-22

1991-07-23

Miller, Stanley D.

350337, 350350S, G02F 113

Patent

active

050338250

ABSTRACT:
A light crystal cell comprising a pair of substrates arranged substantially parallel and provided with electrodes on their opposite surfaces, and a ferroelectric liquid crystal composition held between these substrates, two polarizers arranged on either side of said liquid crystal cell, and an optical retardation film for equalizing the states of polarization of transmitted light that has passed through parts of said liquid crystal cell of different thickness. It is preferable that this optical retardation film is inserted between the liquid crystal cell and a polarizer. The number of optical retardation films need not however be limited to one, and several such films may be used. A polarizer and optical retardation film may also be assembled as one unit.

REFERENCES:
patent: 4711530 (1987-12-01), Nakanowatari et al.
patent: 4838663 (1989-06-01), Lagerwall et al.
patent: 4844569 (1989-07-01), Wada et al.
patent: 4941736 (1990-07-01), Taniguchi et al.

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