Patent ID: 9645445
Date: 2017-05-09
CPC Classifications: B32B,G02B,G02F

Claim:
1. A liquid crystal display, comprising a first polarizer, a liquid crystal layer and a second polarizer, the liquid crystal layer disposed between the first polarizer and the second polarizer, the first polarizer comprising a first triacetyl cellulose layer, a first poly vinyl alcohol layer, a first biaxial layer and a first substrate, the first poly vinyl alcohol layer disposed on the first triacetyl cellulose layer, the first biaxial layer disposed on the first poly vinyl alcohol layer, the first triacetyl cellulose layer, the first poly vinyl alcohol layer and the first biaxial layer fixed to the first substrate, the second polarizer comprising a second substrate, a second triacetyl cellulose layer, a second poly vinyl alcohol layer and a third triacetyl cellulose layer, the second poly vinyl alcohol layer disposed on the second triacetyl cellulose layer, the third triacetyl cellulose layer disposed on the second poly vinyl alcohol layer, the third triacetyl cellulose layer, the second poly vinyl alcohol layer and the second triacetyl cellulose layer fixed to the second substrate, wherein only one biaxial layer is utilized in the liquid crystal display; wherein when a wavelength is 550 nanometers and a range of a pretilt angle of liquid crystal molecules of the liquid crystal layer is between 85 degrees and 90 degrees, a compensation value Rth the compensation value Rth when the compensation value Rth two directions perpendicular to each other on a plane of the biaxial layer are respectively defined as an X axis and a Y-axis, a direction perpendicular to a thickness direction of the first biaxial layer is defined as a Z axis, Nx the second predetermined value satisfies the following equation (4): two directions perpendicular to each other on a plane of the second triacetyl cellulose layer are respectively defined as an X axis and a Y-axis, a direction perpendicular to a thickness direction of the second triacetyl cellulose layer is defined as a Z axis, Nx a slow axis of the first TAC layer is set as U degree, an absorption axis of the first PVA layer is set as 90 degrees, a slow axis of the first, biaxial layer is set as 0 degree, a slow axis of the second TAC layer is set as 90 degrees, an absorption axis of the second PVA layer is set as 0 degree, and a slow axis of the third TAC layer is set as 90 degrees.