Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

1979-02-06

1982-08-31

Bauer, Edward S.

350339R, 350349, G02F 1133

Patent

active

043469639

ABSTRACT:
A liquid crystal display device has a pair of carrier plates having a liquid crystal layer therebetween. Electrically conductive coatings are on each plate with at least one of the coatings being subdivided into separate operable segments. Spacing members are in regions of the layer which are not adjacent to the operable segments. Support surfaces are on a facing surface of one of the plates. Spacing elements are on the other plate and project from the facing surface toward and engage the support surfaces so that the thickness of the liquid crystal layer in the region of the support surfaces is less than the thickness of the layer in the area of the operable segments. The support surfaces may be a layer on the surface of one of the carrier plates or may be a surface of the carrier plate defined by recesses etched into the plate, which recesses contain surfaces supporting the operable segments. To ensure contact between the spacing elements and support surfaces, one of the carrier plates can be provided with a layer which has a different coefficient of thermal expansion so that after being applied at an elevated temperature and cooled, the layer will cause the plate to deflect toward the other plate. The support surfaces may be formed by applying different types of layers of material on the surface of the carrier member either in the desired shape or as a continuous layer with the undesired portions being subsequently removed.

REFERENCES:
patent: 3837730 (1974-09-01), Hatfield et al.
patent: 3932026 (1976-01-01), Sprokel
patent: 3939556 (1976-02-01), Borel et al.
patent: 4128313 (1978-12-01), Cole et al.
patent: 4148128 (1979-04-01), Feldman
patent: 4150878 (1979-04-01), Barzilai et al.
patent: 4235525 (1980-11-01), Berman et al.
patent: 4235526 (1980-11-01), Berman et al.

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