Patent ID: 9638958
Date: 2017-05-02
CPC Classifications: G02F

Claim:
1. A liquid crystal display (LCD), comprising: a backlight source for generating light; a first triacetate cellulose (TAC) film; a first polyvinyl alcohol (PVA) film; a first optical uniaxial phase compensating film, for providing a first compensating value and a second compensating value by adjusting thickness of the first optical uniaxial phase compensating film and by adjusting a first refractive index, a second refractive index, and a third refractive index corresponding to light in a first direction, the light in a second direction, and the light in a third direction, respectively; a liquid crystal (LC) cell; a second optical uniaxial phase compensating film, for providing a third compensating value by adjusting thickness of the second optical uniaxial phase compensating film and by adjusting a fourth refractive index, a fifth refractive index, and a sixth refractive index corresponding to the light in the first direction, the light in the second direction, and the light in the third direction, respectively; a second PVA film; and a second TAC film; light leakage in dark state at a wide viewing angle being controlled according to the first compensating value, the second compensating value, and the third compensating value in the LCD; the first compensating value being determined by an equation as follows: Ro wherein an optical path difference of the LC cell is determined by (ne−no)×d, the optical path difference is between 287.2 nm and 305.7 nm, where ne and no indicate an extraordinary refractive index and an ordinary refractive index of the LC cell, respectively, d indicates thickness of the LC cell, the first compensating value of the first optical uniaxial phase compensating film is between 55 nm and 78 nm, and the second compensating value of the first optical uniaxial phase compensating film is between 208 nm and 281 nm, the third compensating value of the second optical uniaxial phase compensating film is between the Y