Polymer stabilized liquid crystals and flexible devices thereof
AssigneeSniaricerche S.c.p.A
InventorsHassan-Ali Hakemi, Martino Caporusso, Michele Santangelo
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Abstract
The present invention is directed to a method for manufacturing polymer stabilized liquid crystals on large flexible films by lamination wherein the polymer stabilized liquid crystals contain microparticles or microspacers. Also, a method for manufacturing polymer stabilized liquid crystals on large flexible films by lamination of substrates having a replicated structure is provided. Polymer-free liquid crystals may also be used in some of the methods of the invention.
Claims43
A method of making a flexible electrooptical liquid crystal device comprising:
- (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates;
- (b) laminating the substrates together;
- and
- (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal,
- wherein the fluid liquid crystal composition prior to curing comprises 5 to 30 weight percent of the prepolymer.
A method of making a flexible electrooptical liquid crystal device comprising:
- (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates;
- (b) laminating the substrates together;
- and
- (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal,
- wherein the prepolymer is mesogenic.
A method of making a flexible electrooptical liquid crystal device comprising:
- (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates;
- (b) laminating the substrates together;
- and
- (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal,
- wherein the flexible conductive substrates comprise an adhesive layer.
A method of making a flexible electrooptical liquid crystal device comprising:
- (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates;
- (b) laminating the substrates together;
- and
- (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal,
- wherein the lamination in step (b) occurs at a temperature of from 20 to 100 C.
A method of making a flexible electrooptical liquid crystal device comprising:
- (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates;
- (b) laminating the substrates together;
- and
- (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal,
- wherein the flexible conductive substrates are polymeric and have a thickness of from 50 to 200 microns.
A method of making a flexible electrooptical liquid crystal device comprising:
- (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates;
- (b) laminating the substrates together;
- and
- (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal,
- wherein the flexible conductive substrate is a polyethylene terephthalate film coated with indium-tin oxide.
A method of making a flexible electrooptical liquid crystal device comprising:
- (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates;
- (b) laminating the substrates together;
- and
- (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the liquid crystal composition is cured by ultraviolet radiation in two steps,
- wherein the first step comprises placing a mask over the laminated substrates and selectively exposing the laminated substrates to ultraviolet radiation, and the second step comprises removing the mask and exposing the laminated substrates to ultraviolet radiation.
Dependencies are inferred from the claim text.