Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified... – With charge transferring layer of specified composition
Patent
1996-06-14
1997-11-25
Thomas, Alexander
Stock material or miscellaneous articles
Liquid crystal optical display having layer of specified...
With charge transferring layer of specified composition
428195, 428207, 349106, 349110, 427164, 427166, 427167, G02B 520, G02F 11335
Patent
active
056910118
ABSTRACT:
The present invention is a liquid crystal display device comprising a color filter which comprises: a) a transparent substrate; b) an opaque material disposed as a pattern on a major surface of the substrate, which pattern defines borders within which a coloring agent or agents can be received; c) a silicate layer superposing the opaque material, the silicate layer having reactive sites; d) a sufficient concentration of organosiloxane groups bonded to the reactive sites of the silicate layer to render the opaque material dispersion inhibiting; and e) at least one coloring agent disposed within the borders defined by the opaque material.
In another aspect, the present invention is a method of preparing a color filter for a liquid crystal display device that comprises organosiloxane groups bonded to the surface of a black material disposed on a transparent substrate in such a manner as to form borders for wells or channels adapted to receive coloring materials, the bonded organosiloxane groups being prepared by the steps of: a) exposing the black material to a silicon tetrahalide and sufficient water to form a silicate layer on the opaque material; b) contacting the silicate layer with an organosiloxating reagent to form organosiloxane groups bonded to the silicate layer; and c) disposing a coloring agent into at least one well or channel.
The present invention provides an effective means of creating dispersion-preventing patterns for color filters in LCDs.
REFERENCES:
Ferguson, Gregory S. et al., Macromolecules, vol. 26, pp. 5870-5875 (Oct. 1993).
DeKoven Benjamin M.
Newsham Mark D.
The Dow Chemical Company
Thomas Alexander
Willis Reid S.
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