Transmissive or reflective liquid crystal display and novel process for its manufacture
First Claim
Patent Images
1. A LC display comprising a plurality of cells having well-defined size, shape and aspect ratio, said cells filled with a liquid crystal composition.
2 Assignments
0 Petitions
Accused Products
Abstract
This invention relates to liquid crystal (LC) displays comprising cells of well-defined shape, size and aspect ratio which cells are filled with a liquid crystal composition preferably containing dichroic dye(s), and novel processes for their manufacture.
204 Citations
46 Claims
- 1. A LC display comprising a plurality of cells having well-defined size, shape and aspect ratio, said cells filled with a liquid crystal composition.
-
14. A process for the preparation of well-defined cells of substantially uniform size and shape to be used in a LC display, which process comprises the steps of:
-
a) coating a layer of thermoplastic or thermoset precursor on a conductor film;
b) embossing the thermoplastic or thermoset precursor layer with a pre-patterned male mold;
c) releasing the mold from the thermoplastic or thermoset precursor layer;
d) hardening the thermoplastic or thermoset precursor layer; and
e) filling the thus-formed array of microcups with LC.
-
-
22. A process for the preparation of well-defined cells of substantially uniform size and shape to be used in a LC display, which process comprises the steps of:
-
a) coating a layer of radiation curable composition on a conductor film;
b) imagewise exposing the radiation curable layer;
c) removing the unexposed areas by a developer or solvent to reveal an array of microcups; and
d) filling the microcups with LC preferably with a guest dye. - View Dependent Claims (23, 24, 26, 28, 29, 30)
-
-
25. A process for the preparation of an array of well-defined cells used in a LC display, which process comprises the steps of:
-
a) filling the microcups with a liquid crystal composition, preferably with guest dye(s) and a dispersion of thermoset or thermoplastic precursor composition which has a specific gravity lower than that of the LC; and
b) sealing the microcups by hardening the thermoset or thermoplastic precursor composition during or after it phase separates and forms a supernatant layer above the LC.
-
-
27. A process for the preparation of well-defined cells used in a LC display, which process comprises the steps of:
-
a) filling the microcups with a LC composition, b) sealing the microcups by overcoating onto the said LC filled microcups a thermoset or thermoplastic precursor composition which is at least partially immiscible with said LC and has a specific gravity lower than that of said LC, and c) hardening said thermoplastic or thermoset precursor composition.
-
-
31. A process for the manufacture of a LC display, which process comprises the steps of:
-
a) preparing microcups by first coating a layer of thermoplastic or thermoset precursor on a conductor film followed by embossing the thermoplastic or thermoset precursor layer with a male mold or by imagewise exposing the thermoset precursor layer and removing the unexposed areas;
b) filling in the thus-formed array of microcups with LC;
c) sealing the microcups; and
d) laminating the sealed array of LC cells with a second conductor film preferably pre-coated with an adhesive layer. - View Dependent Claims (32, 34, 36, 38)
-
-
33. A process for the manufacture of a multi-color LC display, which process comprises the steps of:
-
a) preparing microcups by first coating a layer of thermoplastic or thermoset precursor on a conductor film followed by embossing the thermoplastic or thermoset precursor layer with a male mode or by imagewise exposing the thermoset precursor layer and removing the unexposed areas;
b) laminating the thus formed array of microcups with a layer of positive photoresist;
c) imagewise exposing the positive photoresist to selectively open the microcups in a predetermined area;
d) filling in the opened microcups with LC with guest dye(s) of the first color;
e) sealing the microcups to form closed LC with guest dye(s) of the first color;
f) repeating Steps c) to e), if necessary, in different areas to generate groups of microcups containing LC fluid of different colors;
g) removing residual positive photoresist, if any; and
h) laminating the sealed array of LC cells with a second transparent conductor film precoated with an adhesive layer. - View Dependent Claims (35, 37, 39, 40, 41, 42)
-
Specification