Compensator for liquid crystal display
AssigneesNippon Oil Co., Ltd., Ricoh Company, Ltd.
InventorsShigeki Iida, Takehiro Toyooka, Yasuyuki Takiguchi, Takamichi Enomoto
Life of this patent
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Abstract
A compensator for liquid crystal display which is composed of: a light transmitting base; an alignment layer formed on said base; and a film formed on said alignment layer by a liquid crystalline polymer which exhibits a twisted nematic orientation in the state of liquid crystal and which assumes the state of glass at a temperature below the liquid crystal transition point thereof.
Claims11
A compensator for liquid crystal display, comprising:
- a light transmitting base;
- an alignment layer formed on said base;
- and
- a film formed on said alignment layer by a liquid crystalline polymer which exhibits a twisted nematic orientation in the state of liquid crystal and which assumes the state of glass at a temperature below the liquid crystal transition point thereof, said liquid crystalline polymer being
- (1)
- (a) an optically active main chain type liquid crystalline polymer selected from the group consisting of polyesters, polyamides, polycarbonates and polyesterimides, or
- (b) an optically active side chain type liquid crystalline polymer selected from the group consisting of polyacrylates, polymethacrylates and polysiloxanes, or
- (2)
- (a) a main chain type liquid crystalline polymer selected from the group consisting of polyesters, polyamides, polycarbonates and polyesterimides, in combination with an optically active compound, or
- (b) a side chain type liquid crystalline polymer selected from the group consisting of polyacrylates, polymethacrylates and polysiloxanes, in combination with an optically active compound.
A compensator for liquid crystal display, comprising:
- a light transmitting base;
- an alignment layer formed on said base;
- and a liquid crystalline polymer film formed on said alignment layer, said liquid crystalline polymer film containing as a main component a polyester which contains an ortho-substituted aromatic unit as a constituent.
A compensator for STN liquid crystal display, having a film obtained by heat-treating an optically active polyester containing an ortho-substituted aromatic unit, or a composition containing a liquid crystalline polyester and an optically active compound which liquid crystalline polyester contains an ortho-substituted aromatic unit as a constituent, on an alignment layer at a temperature above the glass transition point of said polyester, followed by cooling to a temperature below said glass transition point to immobilize a twisted nematic structure.
A compensator for liquid crystal display comprising:
- a light transmitting base;
- an alignment layer formed on said base;
- and
- a film formed on said alignment layer by a liquid crystalline polymer which exhibits a twisted nematic orientation in the state of liquid crystal and which assumes the state of glass at a temperature below the liquid crystal transition point thereof, thereby providing a black-and-white display, said liquid crystalline polymer being
- (1)
- (a) an optically active main chain type liquid crystalline polymer selected from the group consisting of polyesters, polyamides, polycarbonates and polyesterimides, or
- (b) an optically active side chain type liquid crystalline polymer selected from the group consisting of polyacrylates, polymethacrylates and polysiloxanes, or
- (2)
- (a) a main chain type liquid crystalline polymer selected from the group consisting of polyesters polyamides, polycarbonates and polyesterimides, in combination with an optically active compound or
- (b) a side chain type liquid crystalline poller selected from the group consisting of polyacrylates, polymethacrylates and polysiloxanes, in combination with an optically active compound.
Dependencies are inferred from the claim text.