Patent
1980-06-18
1983-07-05
Corbin, John K.
350343, G02F 113
Patent
active
043914918
ABSTRACT:
A passive electro-optic display cell comprises two glass plates each of which is covered with a protective layer, for example of silicon dioxide, on which are fixed conductive electrodes composed, for example, of indium oxide. A bonding layer is placed between each plate so treated and an alignment layer which aligns the molecules of a liquid crystal within the cell, this bonding layer being produced from a transparent organic substance, for example a silane or an aluminate. The alignment layers are composed of a polymerizable material, for example a polyimide. A sealing frame which surrounds the liquid crystal between the plates is likewise composed of a polymerizable material, for example a formaldehyde phenolic resin. A copolymerization of the sealing frame and the two alignment layers is obtained, so that these three elements form a casing which encloses the liquid crystal and protects it against contamination and from external influences. The protective layer prevents ions which originate from the plates from diffusing within the cell.
REFERENCES:
patent: 3994567 (1976-11-01), Matsuo et al.
patent: 4252414 (1981-02-01), Kinugawa et al.
Licari, James J., Plastic Coatings for Electronics, (McGraw-Hill, New York 1970), pp. 57-64, 99-102.
Freer William G.
Varney John C.
Williamson John H.
Corbin John K.
Ebauches Electroniques S.A.
Gallivan Richard F.
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