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    • 71. 发明授权
    • Light pipe, planar light source unit and reflective liquid-crystal display device
    • 光管,平面光源单元和反射型液晶显示装置
    • US06827457B2
    • 2004-12-07
    • US10093409
    • 2002-03-11
    • Seiji UmemotoToshihiko Ariyoshi
    • Seiji UmemotoToshihiko Ariyoshi
    • F21V704
    • G02B6/0036G02B6/0061G02B6/0065G02F2001/133616
    • A light pipe having a plate-like substance having an upper surface, a lower surface opposite to the upper surface, an incidence side surface, and an end surface opposite to the incidence side surface, the plate-like substance including a light output device formed in the upper surface so that light incident on the incidence side surface is made to exit from the lower surface through the light output device, the light output device being constituted by fine grooves arranged discontinuously so as to face the incidence side surface, each of the fine grooves having a length of not larger than 250 &mgr;m and a depth of not larger than 50 &mgr;m and not larger than ⅕ as large as the length, each of the fine grooves being constituted by a combination of an optical path changing slope inclined to the lower surface at an angle in a range of from 35 to 48 degrees and a steep slope facing the optical path changing slope and inclined to the lower surface at an angle of not lower than 60 degrees. A reflective liquid-crystal display device having a planar light source unit including a light pipe defined above, and a reflective liquid-crystal display panel disposed on the lower surface side of the light pipe.
    • 一种具有上表面的板状物质,与上表面相对的下表面,入射侧表面和与入射侧表面相对的端面的光管,所述板状物质包括形成的光输出装置 在上表面使得入射侧入射的光通过光输出装置从下表面离开,光输出装置由不连续地布置以面对入射侧表面的细槽构成,每个 具有不大于250μm的长度的细槽和不大于50um且不大于长度的1/5的深度的细槽,每个细槽由光路改变斜率倾斜 以35度至48度的范围内的角度向下表面倾斜,以及面对光路变化斜率的陡坡,并以不低于60度的角度向下表面倾斜。 一种具有包括上述定义的光管的平面光源单元的反射型液晶显示装置和设置在该光管的下表面侧上的反射型液晶显示面板。
    • 76. 发明授权
    • Optical film, polarizer and display device
    • US06667835B2
    • 2003-12-23
    • US10115898
    • 2002-04-05
    • Shuuji YanoSeiji Umemoto
    • Shuuji YanoSeiji Umemoto
    • G02B2728
    • G02B5/3083G02F1/133634
    • An optical film having a laminate of three birefringent films A, B and C, the birefringent film A exhibiting dispersion and exhibiting Nz of from 0.4 to 0.6, the birefringent film B exhibiting larger dispersion than that of the birefringent film A and exhibiting smaller Re that that of the birefringent film A and Nz of from 0.4 to 0.6, the birefringent film C exhibiting Re of from 200 to 350 nm and exhibiting Nz of from 0.6 (not inclusively) to 0.9, the birefringent films A and B having slow axes crossing each other perpendicularly when Re=(nx−ny)d and Nz=(nx−nz)/(nx−ny) in which nx, ny and nz are refractive indices of each birefringent film in three-dimensional directions X, Y and Z, and d is the thickness of the birefringent film. A polarizer having a laminate of an optical film defined above and an absorptive type polarizing film, the absorptive type polarizing film being laminated on the birefringent film C side of the optical film so that an absorption axis of the absorptive type polarizing film is parallel to a slow axis of the birefringent film C. A liquid-crystal display device or another display device having an optical film or polarizer defined above.
    • 77. 发明授权
    • Light pipe, plane light source unit and liquid-crystal display device
    • 光管,平面光源单元和液晶显示装置
    • US06554440B2
    • 2003-04-29
    • US09729797
    • 2000-12-06
    • Seiji Umemoto
    • Seiji Umemoto
    • F21V704
    • G02B6/0036
    • A light pipe has an upper surface, a lower surface, side surfaces between the upper and lower surfaces, and light output means. At lease two of the side surfaces constitute incidence side surfaces each extending in left-right and front-rear directions of the light pipe. The light output means is formed in one of the upper and lower surfaces so that incident light to the one of the upper and lower surfaces from each of the incidence side surfaces is made to go out from the other one of the upper and lower surfaces by the light output means. The light output means comprises a repetitive structure of prismatic structures having ridgelines extending along each of the incidence side surfaces respectively. There is further provided a plane light source unit in which light sources are provided on the incidence side surfaces, respectively, of the light pipe, and there is still further provided a reflection type or transmission type liquid-crystal display device in which a liquid-crystal cell is disposed on the lower or upper surface side of the light pipe of the plane light source unit.
    • 光管具有上表面,下表面,上表面和下表面之间的侧表面以及光输出装置。 至少两个侧面构成了在光管的左右前后方向上延伸的入射侧面。 光输出装置形成在上表面和下表面中的一个中,使得从每个入射侧表面到上表面和下表面中的一个的入射光通过上表面和下表面中的另一个离开而从 光输出装置。 光输出装置包括具有分别沿每个入射侧表面延伸的脊线的棱镜结构的重复结构。 还设置有一个平面光源单元,其中光源分别设置在光管的入射侧表面上,并且还提供了一种反射型或透射型液晶显示装置, 晶体单元设置在平面光源单元的光管的下表面或上表面侧。
    • 78. 发明授权
    • Polarizer with composite phase compensation film
    • 偏振器与复合相位补偿膜
    • US06542300B2
    • 2003-04-01
    • US09984226
    • 2001-10-29
    • Seiji Umemoto
    • Seiji Umemoto
    • G02B530
    • G02F1/133634G02B5/3083
    • There is provided a polarizer constituted by a polarizing element, and at least one transparent protective film constituted by two layers of retardation films with an in-plane retardation in a range of from 190 to 320 nm with respect to light having a wavelength of 550 nm. The transparent protective film is bonded onto one of opposite surfaces of the polarizing element so that a fast axis of each of the retardation films is parallel with an absorption axis of the polarizing element. The two layers of retardation films are constituted by a combination of a retardation film with Nz of from 0.05 to 0.2 and a retardation film with Nz of from 0.3 to 0.45 in the condition of nx>ny and Nz=(nx−nz)/(nx−ny) in which nx and ny are in-plane refractive indices of the retardation films respectively, and nz is a refractive index in a direction of thickness of each of the retardation films.
    • 提供了一种由偏振元件构成的偏振片,以及至少一个透明保护膜,该透明保护膜由相对于波长为550nm的光的190nm至320nm范围内的面内相位差的两层相位差膜构成 。 透明保护膜粘合到偏振元件的相对表面之一上,使得每个延迟膜的快轴与偏振元件的吸收轴平行。 两层相位差膜由N×0.05〜0.2的延迟膜和Nz为0.3〜0.45的nx> ny的延迟膜和Nz =(nx-nz)/( nx-ny),其中nx和ny分别是延迟膜的面内折射率,nz是每个相位差膜的厚度方向上的折射率。
    • 79. 发明授权
    • Light conductive plate , surface light source device, and reflection type liquid-crystal display
    • 导光板,表面光源装置和反射型液晶显示器
    • US06196692B1
    • 2001-03-06
    • US09293990
    • 1999-04-19
    • Seiji UmemotoShuji YanoHideo Abe
    • Seiji UmemotoShuji YanoHideo Abe
    • F21V800
    • G02B6/005G02B6/0038G02B6/0046G02B6/0065
    • A reflection type liquid-crystal display which is excellent in contrast when viewed with or without illumination and also in display brightness and in which displayed images viewed through a light conductive plate are less apt to be disturbed, i.e., excellent in clearness, and are less apt to have a decrease in perceptibility caused by moire phenomenon; and to develop a light conductive plate and a surface light source device with each of which the liquid-crystal display can be fabricated. A light conductive plate having, formed on the upper surface (11) thereof, a light-emitting means which serves to deflect incident light from an incidence-side edge (13) of the plate to emit the light through the lower surface (12) of the plate and further having, at least on the lower surface thereof, an antireflection layer (2) which enables incident light from the lower surface of the plate to pass through the upper surface of the plate; a surface light source device comprising the light conductive plate described above and a light source disposed by the incidence-side edge thereof; and a reflection type liquid-crystal display comprising the surface light source device described above and, disposed on the lower side thereof, a liquid-crystal cell having a reflecting layer. The antireflection layer disposed on the lower surface inhibits the upper surface from emitting the leakage light which is superposed on displayed images to cause white blurring and a decrease in contrast, whereby satisfactory perceptibility is attained regardless of whether the display is in an illuminated or unilluminated state.
    • 一种反射型液晶显示器,当在有或没有照明的情况下观察时,以及在显示器的亮度和通过导光板观看的显示图像中,对比度都很好,不易受到干扰,即清晰度很好,并且较少 容易造成莫尔条纹现象引起的感知力下降; 并且开发出可以制造液晶显示器的导光板和表面光源装置。1.一种在其上表面(11)上形成有发光装置的导光板,该发光装置用于 使来自所述板的入射侧边缘(13)的入射光偏转以通过所述板的下表面(12)发射光,并且至少在其下表面上还具有防反射层(2),其使得能够入射 来自板的下表面的光通过板的上表面; 包括上述导光板的面光源装置和由其入射侧边缘设置的光源; 以及包括上述表面光源装置的反射型液晶显示器,并且在其下侧设置有具有反射层的液晶单元。设置在下表面上的防反射层阻止上表面发射 叠加在显示图像上的泄漏光导致白色模糊和对比度降低,从而获得令人满意的感知能力,而不管显示器是处于照明状态还是未点亮状态。