High luminance polarizing plate, and liquid crystal panel and image display using same
First Claim
1. A high-brightness polarizing plate, comprising:
- a polarizing plate;
wherein the polarizing plate comprises a polarizer and a protective film prepared on one or both sides of the polarizer, and the polarizer and the protective film are adhered with an adhesive;
a brightness enhancement film; and
an adhesive layer through which the polarizing plate and the brightness enhancement film are laminated with the protective film interposed between them, whereinthe protective film has an in-plane retardation Re of 0 to 10 nm and a thickness-direction retardation Rth of −
30 to 10 nm, wherein
Re=(nx−
ny)d and Rth={(nx+ny)/(2−
nz)} d, whereinnx is a refractive index in an X-axis direction in which a maximum in-plane refractive index is obtained, ny is a refractive index in a Y-axis direction perpendicular to the X-axis, nz is a refractive index in a Z-axis direction which is the film thickness direction, and d is a thickness (nm) of the protective film.
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Accused Products
Abstract
A high-brightness polarizing plate of the present invention comprises a polarizing plate that comprises a polarizer and a protective film prepared on one or both sides of the polarizer, a brightness enhancement film and an adhesive layer through which the polarizing plate and the brightness enhancement film are laminated with the protective film interposed between them, wherein the protective film has an in-plane retardation Re of 0 to 10 nm and a thickness-direction retardation Rth of −30 to 10 nm, wherein Re=(nx−ny)d and Rth={(nx+ny)/(2−nz)}d. The high-brightness polarizing plate has a small color shift, and can be applied to various image displays such as liquid crystal displays.
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Citations
13 Claims
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1. A high-brightness polarizing plate, comprising:
- a polarizing plate;
wherein the polarizing plate comprises a polarizer and a protective film prepared on one or both sides of the polarizer, and the polarizer and the protective film are adhered with an adhesive; a brightness enhancement film; and
an adhesive layer through which the polarizing plate and the brightness enhancement film are laminated with the protective film interposed between them, whereinthe protective film has an in-plane retardation Re of 0 to 10 nm and a thickness-direction retardation Rth of −
30 to 10 nm, wherein
Re=(nx−
ny)d and Rth={(nx+ny)/(2−
nz)} d, whereinnx is a refractive index in an X-axis direction in which a maximum in-plane refractive index is obtained, ny is a refractive index in a Y-axis direction perpendicular to the X-axis, nz is a refractive index in a Z-axis direction which is the film thickness direction, and d is a thickness (nm) of the protective film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- a polarizing plate;
Specification