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US 5,179,457 AGranted
Liquid crystal display device with birefringent film between the substrates of the liquid crystal
AssigneeHitachi, Ltd.
InventorsJun-ichi Hirataka, Katsumi Kondo, Yasushi Tomioka, Shuji Imazeki, Yoshio Taniguchi
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Abstract
A liquid crystal display device includes a phase-plate disposed between a pair of substrates, preferably inside of the electrode, to increase the transmission rate and improve the contrast ratio of the display.
Claims15
A liquid crystal display device comprising,
- a) in sandwich arrangement from the outside to the inside:
- aa) a pair of substrates;
- bb) a pair of electrode structures at least one of which is transparent;
- cc) a liquid crystal material sandwiched between said pair of electrodes and substrates;
- and
- dd) a spacer and
- b) at least one film having birefringence sandwiched between said pair of substrates;
- wherein a display is effected by applying an electric field to said liquid crystal material through said electrode structures.
5 more elements
A liquid crystal display device comprising, in sandwich structure,
- a pair of substrates,
- a pair of electrode structures,
- a liquid crystal layer sandwiched between said pair of substrates and electrode structures, and
- an optical birefringent device disposed between said pair of substrates including a solid layer type structure substantially transparent to a light employed wherein a pattern is formed in said structure by two areas, each area having a different birefringent property and said pattern is arranged within the light path of the liquid crystal display device.
1 more element
A film consisting essentially of polydiacetylene, the polydiacetylene molecules being oriented predominantly in one direction, said film being substantially uncolored, transparent and birefringent, said film having adhesive properties.
Dependencies are inferred from the claim text.