Liquid crystal display devices incorporating polarizers comprising liquid crystal polymers
AssigneeHoechst Celanese Corporation
InventorsChia-Chi Teng, Hyun Nam Yoon, Sunny Shen
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Abstract
This invention discloses novel liquid crystal display devices containing polarizers which comprise a liquid crystal polymer and a dichroic absorber. Also disclosed is a process to construct the liquid crystal display devices.
Claims10
A liquid crystal display device comprising a polarizer film, a conductive layer, an alignment layer and a phase compensation layer, wherein said polarizer film comprises a dichroic absorber and a thermotropic liquid crystal polyester, further wherein said polyester comprises repeat units corresponding to the formula:
- -P.sup.1 !.sub.m -P.sup.2 !.sub.n -P.sup.3 !.sub.q -
- wherein P.sup.1, P.sup.2 and P.sup.3 represent monomeric moieties with P.sup.1 being an aromatic hydroxy carboxylic acid, P.sup.2 being an aromatic dicarboxylic acid and P.sup.3 being a phenol;
- and m, n and q represent mole percent of the respective monomers ranging from 5-70 mole percent individually.
A process of constructing a liquid crystal display device comprising:
- (a) coating a conductive layer on a suitable first substrate;
- (b) patterning the coated substrate;
- (c) applying an alignment layer on the patterned substrate;
- (d) rubbing said alignment layer;
- (e) repeating steps (a) through (d) on a suitable second substrate;
- (f) applying a spacer material to said first substrate and bringing the two substrates suitably into contact so as to form a sandwich structure with a cell in between;
- (g) filling said cell with a liquid crystal material;
- (h) applying a polarizer on the two outer surfaces of the sandwich structure and aligning said polarizer with said alignment layer, wherein said polarizer comprises a liquid crystal polyester and a dichroic absorber;
- and
- (i) applying electrodes to said conductive layer, further wherein said polyester comprises repeat units corresponding to the formula:
- -P.sup.1 !.sub.m -P.sup.2 !.sub.n -P.sup.3 !.sub.q -
- wherein P.sup.1, P.sup.2 and P.sup.3 represent monomeric moieties with P.sup.1 being an aromatic hydroxy carboxylic acid P.sup.2 being an aromatic dicarboxylic acid and P.sup.3 being a phenol;
- and m, n and q represent mole percent of the respective monomers ranging from 5-70 mole percent individually.
Dependencies are inferred from the claim text.