Compensator for liquid crystal display
AssigneeNippon Oil Co., Ltd.
InventorsTakehiro Toyooka, Shigeki Iida, Hiroyuki Itoh
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Abstract
A compensator for an active matrix type liquid crystal display using a thin film transistor is provided. The compensator is made by a film of a liquid crystalline polymer which exhibits a twisted nematic orientation in a liquid crystal state and assumes a glassy state at temperatures below a liquid crystal transition point thereof, the constituent molecules of the liquid crystalline polymer film having a helical structure with a helical axis wherein the twist angle is in the range of 70 to 150 degrees, and the product .DELTA.n.multidot.d of birefringence .DELTA.n of the liquid crystalline polymer film and film thickness,d, being in the range of 0.2 to 3.0 .mu.m.
Claims13
A compensator for liquid crystal display of an active matrix type constituted by a film of a liquid crystalline polymer which exhibits a twisted nematic orientation in a liquid crystal state and assumes a glassy state at temperatures below a liquid crystal transition point thereof, the constituent molecules of said liquid crystalline polymer film having a helical structure with a helical axis wherein the twist angle is in the range of 70 to 150 degrees, and the product .DELTA.n.multidot.d of birefringence .DELTA.n of the liquid crystalline polymer film and the film thickness d being in the range of 0.2 to 3.0 .mu.n, and wherein the constituent molecules of the liquid crystalline polymer fill are selected from the group consisting of polyesters, polyamides, polycarbonates, polyesterimides, polyacrylates, polymethacrylates, polymalonates, and polysiloxanes.
A compensator for liquid crystal display of an active matrix type comprising a light transmitting base, an alignment fill formed on said base, and a film of a liquid crystalline polymer formed on said alignment film, said liquid crystalline polymer exhibiting a twisted nematic orientation in a liquid crystal state and assuming a glassy state at temperatures below a liquid crystal transition point thereof, and wherein the constituent molecules of the liquid crystalline polymer fill are selected from the group consisting of polyesters, polyamides, polycarbonates, polyesterimides, polyacrylates, polymethacrylates, polymalonates, and polysiloxanes.
Dependencies are inferred from the claim text.