Optical compensatory sheet and process for preparation of the same and liquid crystal display
First Claim
Patent Images
1. An optical compensatory sheet which comprises a layer in the condition of a mono-domain of a discotic nematic phase, an optic axis of the sheet being inclined at 5 to 50 degrees from a line normal to the sheet.
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Abstract
Disclosed is an optical compensatory sheet which comprises a layer in the condition of a mono-domain of discotic nematic phase or a monoaxial columnar phase. Further, a process for preparation of the optical compensatory sheet and a liquid crystal display provided with the optical compensatory sheet are disclosed.
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Citations
20 Claims
- 1. An optical compensatory sheet which comprises a layer in the condition of a mono-domain of a discotic nematic phase, an optic axis of the sheet being inclined at 5 to 50 degrees from a line normal to the sheet.
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10. A process for preparation of an optical compensatory sheet, which comprises the steps of:
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coating a solution containing a compound capable of forming a discotic nematic phase on a transparent support to form a coated layer, heating the coated layer to temperature for forming the discotic nematic phase, and cooling the coated layer to form a layer in the condition of a mono-domain of the discotic nematic phase, whereby an optical compensatory sheet comprising the transparent support and the layer in the condition of a mono-domain, an optic axis of the sheet being inclined at 5 to 50 degrees from a line normal to the sheet is prepared. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A liquid crystal display comprising a liquid crystal cell which comprises a pair of substrates provided with a transparent electrode and twist-oriented nematic liquid crystal sealed therebetween, a pair of polarizing sheets arranged on both sides of the cell, and an optical compensatory sheet provided between the liquid crystal cell and the polarizing sheet;
wherein the optical compensatory sheet comprises a layer in the condition of a mono-domain of a discotic nematic phase, an optic axis of the sheet being inclined at 5 to 50 degrees from a line normal to the sheet. - View Dependent Claims (18, 19, 20)
Specification