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    • 4. 发明授权
    • Image display device having polarizer with polarizer protection
    • 图像显示装置具有带偏振器保护的偏振器
    • US08687152B2
    • 2014-04-01
    • US12949952
    • 2010-11-19
    • Akinori IzakiSeiji UmemotoShouji YamamotoKentarou TakedaMitsuru Suzuki
    • Akinori IzakiSeiji UmemotoShouji YamamotoKentarou TakedaMitsuru Suzuki
    • G02F1/1335
    • H01L51/5275G02B1/105G02B1/14G02B5/3083H01L51/5253
    • Provided is an image display device including an image display cell and a polarizing plate placed on a viewer side of the image display cell. The first polarizing plate includes a polarizer and a first protective film. The first protective film is placed on a viewer-side principal surface of the polarizer and satisfies following relations: (i) 0 nm≦Re1≦3000 nm; (ii) Nz1≧7; and (iii) Rth1>2500 nm. Re1, Rth1 and Nz1 are defined by following equations: Re1=(nx1−ny1)d1; Rth1=(nx1−nz1)d1; and Nz1=Rth1/Re1, wherein d1 represents a thickness of the first protective film, nx1 represents a refractive index in a direction of an in-plane slow axis of the protective film, ny1 represents a refractive index in a direction of an in-plane fast axis of the protective film, and nz1 represents a refractive index in a direction of the thickness of the protective film.
    • 提供了一种图像显示装置,包括放置在图像显示单元的观察者侧的图像显示单元和偏振板。 第一偏振板包括偏振器和第一保护膜。 第一保护膜放置在偏振片的观察者侧主表面上,并且满足以下关系:(i)0nm≦̸ Re1≦̸ 3000nm; (ii)Nz1≥7; 和(iii)Rth1> 2500nm。 Re1,Rth1和Nz1由以下等式定义:Re1 =(nx1-ny1)d1; Rth1 =(nx1-nz1)d1; Nz1 = Rth1 / Re1,其中d1表示第一保护膜的厚度,nx1表示保护膜的面内慢轴方向的折射率,ny1表示保护膜的面内慢轴的折射率, 保护膜的平面快轴,nz1表示保护膜的厚度方向的折射率。
    • 7. 发明授权
    • Liquid crystal panel and liquid crystal display apparatus
    • 液晶面板和液晶显示装置
    • US07643117B2
    • 2010-01-05
    • US11996539
    • 2007-04-17
    • Toshiyuki IidaAkinori IzakiHisae SugiharaYutaka Ohmori
    • Toshiyuki IidaAkinori IzakiHisae SugiharaYutaka Ohmori
    • G02F1/1335G02F1/1337
    • G02F1/133634G02B5/3083G02F1/133528
    • There is provided a liquid crystal panel, in which a color shift in an oblique direction is small even when observed from any azimuth angle of 0° to 360°, and the viewing angle in the horizontal direction is wide. A liquid crystal panel according to the present invention includes: a liquid crystal cell; a first polarizer placed on one side of the liquid crystal cell; a second polarizer placed on the other side of the liquid crystal cell; and a first optical compensation layer and a second optical compensation layer placed between the first polarizer and the second polarizer, wherein: the first optical compensation layer is placed between the first polarizer and the liquid crystal cell; a slow axis direction of the first optical compensation layer is substantially perpendicular to an absorption axis direction of the first polarizer; the first optical compensation layer has a refractive index profile of nx>ny≧nz; the first optical compensation layer includes a retardation film (A) which contains a polyvinyl acetal-based resin and whose in-plane retardation value (Re[750]) at a wavelength of 750 nm is larger than an in-plane retardation value (Re[550]) at a wavelength of 550 nm; the second optical compensation layer is placed between the first optical compensation layer and the second polarizer; and the second optical compensation layer has a refractive index profile of nx=ny>nz.
    • 即使从0°至360°的任意方位角观察,倾斜方向的色移也较小,水平方向的视野宽的液晶面板。 根据本发明的液晶面板包括:液晶盒; 放置在液晶单元一侧的第一偏振片; 放置在液晶单元的另一侧的第二偏振器; 以及第一光学补偿层和第二光学补偿层,其设置在所述第一偏振器和所述第二偏振器之间,其中:所述第一光学补偿层被放置在所述第一偏振器和所述液晶单元之间; 第一光学补偿层的慢轴方向基本上垂直于第一偏振器的吸收轴方向; 第一光学补偿层具有nx> ny> = nz的折射率分布; 第一光学补偿层包括含有聚乙烯醇缩醛类树脂的相位差膜(A),并且在波长750nm处的面内延迟值(Re [750])大于面内延迟值(Re [550])在波长为550nm处; 第二光学补偿层被放置在第一光学补偿层和第二偏振器之间; 并且第二光学补偿层具有nx = ny> nz的折射率分布。
    • 8. 发明申请
    • LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY APPARATUS
    • 液晶板和液晶显示设备
    • US20090046224A1
    • 2009-02-19
    • US11996539
    • 2007-04-17
    • Toshiyuki IidaAkinori IzakiHisae SugiharaYutaka Ohmori
    • Toshiyuki IidaAkinori IzakiHisae SugiharaYutaka Ohmori
    • G02F1/1335
    • G02F1/133634G02B5/3083G02F1/133528
    • There is provided a liquid crystal panel, in which a color shift in an oblique direction is small even when observed from any azimuth angle of 0° to 360°, and the viewing angle in the horizontal direction is wide. A liquid crystal panel according to the present invention includes: a liquid crystal cell; a first polarizer placed on one side of the liquid crystal cell; a second polarizer placed on the other side of the liquid crystal cell; and a first optical compensation layer and a second optical compensation layer placed between the first polarizer and the second polarizer, wherein: the first optical compensation layer is placed between the first polarizer and the liquid crystal cell; a slow axis direction of the first optical compensation layer is substantially perpendicular to an absorption axis direction of the first polarizer; the first optical compensation layer has a refractive index profile of nx>ny≧nz; the first optical compensation layer includes a retardation film (A) which contains a polyvinyl acetal-based resin and whose in-plane retardation value (Re[750]) at a wavelength of 750 nm is larger than an in-plane retardation value (Re[550]) at a wavelength of 550 nm; the second optical compensation layer is placed between the first optical compensation layer and the second polarizer; and the second optical compensation layer has a refractive index profile of nx=ny>nz.
    • 即使从0°〜360°的方位角观察,倾斜方向的色移也较小,水平方向的视野宽,因此设置了液晶面板。 根据本发明的液晶面板包括:液晶单元; 放置在液晶单元一侧的第一偏振片; 放置在液晶单元的另一侧的第二偏振器; 以及第一光学补偿层和第二光学补偿层,其设置在所述第一偏振器和所述第二偏振器之间,其中:所述第一光学补偿层被放置在所述第一偏振器和所述液晶单元之间; 第一光学补偿层的慢轴方向基本上垂直于第一偏振器的吸收轴方向; 第一光学补偿层具有nx> ny> = nz的折射率分布; 第一光学补偿层包括含有聚乙烯醇缩醛类树脂的相位差膜(A),其在波长750nm处的面内延迟值(Re [750])大于面内延迟值(Re [550])在波长为550nm处; 第二光学补偿层被放置在第一光学补偿层和第二偏振器之间; 并且第二光学补偿层具有nx = ny> nz的折射率分布。