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AssigneeShenzhen China Star Optoelectronics Technology Co., Ltd.
InventorsChih-Tsung Kang, Bo Hai
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The present invention provides an optical compensation film group and a method for reducing light leakage of a vertical alignment LCD using the same. For the vertical alignment LCD at a wavelength of 550 nm, an LCΔnd in the range of [305.8 nm, 324.3 nm], and a pretilt angle in the range of [85°, 90°), a compensation value Ro of an in-plane optical path difference of the biaxial compensation film is in the range of 48 nm≦Ro≦84 nm, and a compensation value Rth of an out-of-plane optical path difference of the biaxial compensation film is in the range of 160 nm≦Rth≦280 nm, and a TAC compensation film having a compensation value Rth is in the range of Y1≦Rth≦Y2. The present invention can effectively improve the serious light leakage caused by the conventional compensation structure with a single biaxial compensation film, the contrast and sharpness at the large viewing angles, and the costs.
An optical compensation film group for a vertical alignment LCD, and for the vertical alignment LCD at a wavelength of 550 nm, an LC Δnd in the range of [305.8 nm, 324.3 nm], and a pretilt angle in the range of [85°, 90°), the optical compensation film group comprising:
A method for reducing light leakage of a vertical alignment LCD using optical compensation film group, wherein the optical compensation film group comprises a biaxial compensation film and a TAC compensation film, and for the vertical alignment LCD at a wavelength of 550 nm, an LC Δnd in the range of [305.8 nm, 324.3 nm], and a pretilt angle in range of [85°, 90°], the method comprising steps of:
Dependencies are inferred from the claim text.