Passive electro-optic display cell and method of manufacturing thereof
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United States of America Patent
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Jul 5, 1983
Grant Date -
N/A
app pub date -
Jun 18, 1980
filing date -
May 4, 1979
priority date (Note) -
Expired
status (Latency Note)
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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.
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