发明授权
- 专利标题: Bi-axial retardation compensation film and vertically aligned liquid crystal display using the same
- 专利标题(中): 双轴向延迟补偿膜和使用其的垂直取向液晶显示器
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申请号: US12840172申请日: 2010-07-20
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公开(公告)号: US08237898B2公开(公告)日: 2012-08-07
- 发明人: Byoung-kun Jeon , Sergey Belyaev , Jeong-su Yu
- 申请人: Byoung-kun Jeon , Sergey Belyaev , Jeong-su Yu
- 申请人地址: KR Seoul
- 专利权人: LG Chem, Ltd.
- 当前专利权人: LG Chem, Ltd.
- 当前专利权人地址: KR Seoul
- 代理机构: McKenna Long & Aldridge LLP
- 优先权: KR10-2003-0005468 20030128
- 主分类号: G02F1/1335
- IPC分类号: G02F1/1335
摘要:
The present invention relates to a vertically aligned LCD (VA-LCD) employing a bi-axial retardation compensation film, in which an in-plain refractive index (nx, ny) and a thickness refractive index (nz) of the film is nx>ny>nz. The film has a reversed wavelength dispersion in which retardation is increased in proportion to the increase of a wavelength in the range of visible rays and has a normal wavelength dispersion in which an absolute value of the thickness retardation is decreased in proportion to the increase of a wavelength in the range of visible rays. The VA-LCD cell having a retardation compensation characteristic is comprised by arranging a bi-axial retardation compensation film between the vertically aligned panel and a upper and lower polarizing plate. The VA-LCD of the present invention improves contrast characteristics on a front surface and at a tilt angle and minimizes coloring in a black state according to the tilt angle.
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