Optical compensatory sheet having an orientation layer activated by irradiation of light, process and preparation of the same and liquid crystal display
First Claim
1. An optical compensatory sheet comprising a transparent support, an orientation layer and an optically anisotropic layer in order, said orientation layer containing a light-sensitive polymer, and said optically anisotropic layer containing an aligned and fixed discotic liquid crystal compound, wherein the light-sensitive polymer is a polymer chemically binding a photochromic compound.
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Abstract
An optical compensatory sheet comprises a transparent support, an orientation layer and an optically anisotropic layer in order. The optically anisotropic layer contains an aligned and fixed discotic liquid crystal compound. The orientation layer has a function of aligning the discotic liquid crystal compound. The function of the orientation layer is activated by irradiating the layer with light from a single direction. The present specification also discloses a process for the preparation of the optical compensatory sheet and a liquid crystal display using the optical compensatory sheet.
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Citations
17 Claims
- 1. An optical compensatory sheet comprising a transparent support, an orientation layer and an optically anisotropic layer in order, said orientation layer containing a light-sensitive polymer, and said optically anisotropic layer containing an aligned and fixed discotic liquid crystal compound, wherein the light-sensitive polymer is a polymer chemically binding a photochromic compound.
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9. A process for the preparation of an optical compensatory sheet, which comprises the steps in order of:
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(1) forming a layer containing a light-sensitive polymer on a transparent support, wherein the light-sensitive polymer is a polymer chemically binding a photochromic compound; (2) irradiating the layer containing the light-sensitive polymer with light applied in a single direction; (3) forming a layer containing a discotic liquid crystal compound having a polymerizable group and a photo polymerization initiator on the layer containing the light-sensitive polymer; and (4) irradiating the layer containing the discotic liquid crystal compound and the photo polymerization initiator with light. - View Dependent Claims (10, 11, 12, 13, 14)
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- 15. A liquid crystal display comprising a liquid crystal cell, a polarizing sheet and an optical compensatory sheet provided between the liquid crystal cell and the polarizing sheet, wherein the optical compensatory sheet comprises a transparent support, an orientation layer and an optically anisotropic layer in order, said optically anisotropic layer containing an aligned and fixed discotic liquid crystal compound, and said orientation layer containing a light-sensitive polymer, and wherein the light-sensitive polymer is a polymer chemically binding a photochromic compound.
Specification