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    • 2. 发明授权
    • Optical film, method of producing the same, and image display apparatus using the optical film
    • 光学膜,其制造方法和使用该光学膜的图像显示装置
    • US07906184B2
    • 2011-03-15
    • US11817762
    • 2006-01-30
    • Seiji UmemotoIkuo KawamotoKentarou Takeda
    • Seiji UmemotoIkuo KawamotoKentarou Takeda
    • G02F1/13363G02B1/08
    • G02F1/133634G02B5/3083G02B27/281Y10T428/1036Y10T428/1041
    • An object of the present invention is to provide an optical film capable of contributing to reduction in thickness, preventing uneven heating, and favorably preventing light leak in black display, and an image display apparatus using such an optical film. An optical film of the present invention includes a polarizer, a first optical compensation layer having a refractive index profile of nx>ny=nz, and a second optical compensation layer having a refractive index profile of nx>ny>nz in the stated order. In the optical film, an angle formed between an absorption axis of the polarizer and a slow axis of the first optical compensation layer is +17° to +27° or −17° to −27°, an angle formed between the absorption axis of the polarizer and a slow axis of the second optical compensation layer is +85° to +95°, and an Nz coefficient of the second optical compensation layer is 1.2≦Nz≦2.
    • 本发明的目的是提供一种能够有助于减小厚度,防止不均匀加热,有利地防止黑色显示器中的漏光的光学膜和使用这种光学膜的图像显示装置。 本发明的光学膜包括偏振器,具有nx> ny = nz的折射率分布的第一光学补偿层,以及按照所述顺序具有nx> ny> nz的折射率分布的第二光学补偿层。 在光学膜中,在偏振片的吸收轴与第一光学补偿层的慢轴之间形成的角度为+ 17°至+ 27°或-17°至-27°, 偏振器和第二光学补偿层的慢轴为+ 85°至+ 95°,第二光学补偿层的Nz系数为1.2≦̸ Nz≦̸ 2。
    • 6. 发明授权
    • Liquid crystal display device having a polarization member that includes a cholesteric liquid crystal layer and solid optical rotatory film
    • 具有包括胆甾型液晶层和固体旋光膜的偏振构件的液晶显示装置
    • US07106397B1
    • 2006-09-12
    • US10031871
    • 2000-08-04
    • Ikuo KawamotoTadayuki Kameyama
    • Ikuo KawamotoTadayuki Kameyama
    • G02F1/1335
    • G02F1/133528G02B5/3016G02F2001/133543G02F2001/133567G02F2001/133638H01L2924/01014
    • The present invention provides a polarizing member constituted by, at least, a cholesteric liquid-crystal layer (1), a quarter-wave plate (2), and an optical rotatory layer (3). By the polarizing member according to the present invention, the plane of polarization of light linearly polarized by a combination of the cholesteric liquid-crystal layer and the quarter-wave plate are rotated by the optical rotatory layer so that the linearly polarized light is supplied to an absorption type polarizer (4) with good coincidence between the plane of polarization of the linearly polarized light and the axis of polarization of the absorption type polarizer. Thus, there can be obtained a liquid-crystal display device which has luminance improved by prevention of absorption loss and is excellent in display quality. That is, in a liquid-crystal display device improved in luminance by use of a cholesteric liquid-crystal layer, coloring can be suppressed evenly in all obliquely viewing azimuths while good viewing characteristic can be achieved in a frontal direction.
    • 本发明提供至少由胆甾醇型液晶层(1),四分之一波片(2)和旋光层(3)构成的偏振元件。 通过根据本发明的偏光元件,通过胆甾型液晶层和四分之一波片的组合线性偏振的光的偏振面被旋光层旋转,使得线偏振光被提供给 在线偏振光的偏振面与吸收型偏振片的偏振轴之间具有良好一致性的吸收型偏振片(4)。 因此,可以获得通过防止吸收损失而提高亮度并且显示质量优异的液晶显示装置。 也就是说,在通过使用胆甾醇型液晶层而提高亮度的液晶显示装置中,可以在所有倾斜观察方位均匀地抑制着色,同时可以在正面方向上实现良好的观看特性。