Rectangular optical compensatory sheet, process for preparation of the same, and liquid crystal display
First Claim
1. A rectangular optical compensatory sheet having a shorter side of not less than 14 cm which comprises a transparent support, an orientation layer provided thereon and an optically anisotropic layer provided on the orientation layer, the optically anisotropic layer comprising a compound having one or more discotic structure units in its molecule, and whose variation of retardation in overall area is within X±
- 5 nm wherein X is in the range of 0 to 100 nm, the retardation being represented by the formula;
(nx-ny)×
din which nx and ny are main refractive indices on the plane of the sheet and d is the thickness of the sheet in terms of nm.
3 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is a rectangular optical compensatory sheet having a shorter side of not less than 14 cm which comprises a transparent support, an orientation layer provided thereon and an optically anisotropic layer provided on the orientation layer, the optically anisotropic layer comprising a compound having one or more discotic structure units in its molecule, and whose variation of retardation in overall area is within X±5 nm wherein X is in the range of 0 to 100 nm, the retardation being represented by the formula: (nx-ny)×d in which nx and ny are main refractive indices on the plane of the sheet and d is the thickness of the sheet in terms of nm. Further, a liquid crystal display and a color liquid crystal display provided with the optical compensatory sheet are disclosed.
-
Citations
11 Claims
-
1. A rectangular optical compensatory sheet having a shorter side of not less than 14 cm which comprises a transparent support, an orientation layer provided thereon and an optically anisotropic layer provided on the orientation layer, the optically anisotropic layer comprising a compound having one or more discotic structure units in its molecule, and whose variation of retardation in overall area is within X±
- 5 nm wherein X is in the range of 0 to 100 nm, the retardation being represented by the formula;
(nx-ny)×
din which nx and ny are main refractive indices on the plane of the sheet and d is the thickness of the sheet in terms of nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- 5 nm wherein X is in the range of 0 to 100 nm, the retardation being represented by the formula;
-
11. A rectangular optical compensatory sheet having a shorter side of not less than 14 cm which comprises an optically anisotropic layer comprising a compound having one or more discotic structure units in its molecule, and whose variation of retardation in overall area is within X±
- 5 nm wherein X is in the range of 0 to 100 nm, the retardation being represented by the formula;
(nx-ny)×
din which nx and ny are main refractive indices on the plane of the sheet and d is the thickness of the sheet in terms of nm.
- 5 nm wherein X is in the range of 0 to 100 nm, the retardation being represented by the formula;
Specification