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AssigneeShenzhen China Star Optoelectronics Technology Co., Ltd.
InventorsChih-Tsung Kang, Bo Hai
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Optical compensation films and a method for reducing dark-state light leakage of vertical alignment liquid crystal displays are disclosed. The light path difference (LCΔND) is in a range of 324.3-342.8 nm, and the pretilt angle is in a range of 85 to 90 degrees when measured at a wavelength of 550 nm. Wherein an in-plain retardation value Ro of the biaxial compensation film is in the range of 48-84 nm, an out-of-plain retardation value Rth of the biaxial compensation film is in the range of 160-280 nm, and a retardation value Rth of the TAC compensation film is within a range between Y1 and Y2. The compensation structure with single layer of biaxial compensation film not only can reduce the dark-state light leakage, but also can increase the contrastness and the resolution in the wide viewing angle.
An optical compensation film for vertical alignment liquid crystal displays, on which at least one biaxial compensation film and one TAC compensation film are provided, a light path difference (LCΔND) is in the range of 324.3-342.8 nm, and a pretilt angle is in a range of 85 to 90 degrees when measured at a wavelength of 550 nm, and wherein:
A method for reducing dark-state light leakage for vertical alignment liquid crystal displays using an optical compensation film, the optical compensation film comprising at least one biaxial compensation film and one TAC compensation film, wherein a light path difference (LCΔND) is in the range of 324.3-342.8 nm and a pretilt angle is in a range of 85 to 90 degrees when measured at wavelength of 550 nm, the method comprising:
Dependencies are inferred from the claim text.