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    • 22. 发明授权
    • Cholesteric liquid crystal layer, optical element, lighting device, and
liquid crystal display
    • 胆固醇液晶层,光学元件,照明装置和液晶显示器
    • US6088079A
    • 2000-07-11
    • US240696
    • 1999-02-02
    • Tadayuki KameyamaHironori MotomuraNaoki Takahashi
    • Tadayuki KameyamaHironori MotomuraNaoki Takahashi
    • C09K19/02G02B5/30G02F1/1335G02F1/13357
    • G02B5/3016G02F1/133536
    • A cholesteric liquid crystal layer which is inhibited from appearing to be colored when viewed from slant directions and thus has excellent viewing angle characteristics, while enabling an improvement in the brightness of liquid crystal displays, etc.; and an optical element and an lighting device with each of which liquid crystal displays and the like excellent in brightness and perceptibility can be fabricated. The cholesteric liquid crystal layer (1) has a helical pitch changing in the thickness direction and shows circular dichroism over a wavelength region having a width of at least 50 nm and including a wavelength of 550 nm, wherein the linearly polarized light obtained through a quarter-wavelength plate has a maximum degree of polarization at a wavelength not shorter than 550 nm, or the degree of polarization thereof in a wavelength region on the longer-wavelength side of 550 nm is higher than that in a wavelength region on the shorter-wavelength side of 550 nm. The optical element comprises a multilayer structure composed of the cholesteric liquid crystal layer and at least one optical layer superposed thereon which is a retardation compensating plate, a polarizing plate, a light conductive plate, or a quarter-wavelength plate having an Nz of -1.2 or larger and disposed on the longer-helical-pitch side of the liquid crystal layer. The lighting device or liquid crystal display comprises the cholesteric liquid crystal layer or optical element disposed on one side of a surface light source or liquid crystal cell.
    • 胆甾醇型液晶层从倾斜方向观察时被抑制为不着色,因此具有优异的视角特性,同时能够提高液晶显示器的亮度等; 并且可以制造具有优异的亮度和感知性的液晶显示器等的光学元件和照明装置。 胆甾型液晶层(1)在厚度方向上具有螺旋形间距变化,并且在宽度为至少50nm并且包括波长为550nm的波长区域上呈圆形二色性,其中通过四分之一得到的线偏振光 波长板在不小于550nm的波长处具有最大偏振度,或者在550nm的较长波长侧的波长区域中的偏振度比在较短波长的波长区域中的偏振度高 侧面为550nm。 光学元件包括由胆甾型液晶层和叠加在其上的至少一个光学层构成的多层结构,其是延迟补偿板,偏振片,导光板或Nz为-1.2的四分之一波长板 或更大并且设置在液晶层的较长螺旋节距侧。 照明装置或液晶显示器包括设置在表面光源或液晶单元一侧的胆甾醇型液晶层或光学元件。
    • 23. 发明授权
    • Multi-layer circularly polarized light separation plate containing
cholesteric liquid crystal polymer layers
    • 含有胆固醇液晶聚合物层的多层圆偏振光分离板
    • US6016177A
    • 2000-01-18
    • US87162
    • 1998-05-29
    • Hironori MotomuraTadayuki KameyamaNaoki Takahashi
    • Hironori MotomuraTadayuki KameyamaNaoki Takahashi
    • F21V9/14G02B5/30G02F1/1335G02F1/13357C09K19/02
    • G02F1/13362G02B5/3033G02F1/133536G02F2001/133543
    • Disclosed are a method for producing a circularly polarized separated plate which comprises coating an oriented cholesteric liquid crystal polymer layer with a different kind of cholesteric liquid crystal polymer and heat orienting the resulting coated layer, or heat pressing oriented cholesteric liquid crystal polymer layers on each other, or adhering oriented cholesteric liquid crystal polymer layers to each other through a volatile liquid or a volatile liquid in which a cholesteric liquid crystal polymer is dissolved, thereby forming a close contact laminate of two or more cholesteric liquid crystal polymer layers in which an upper layer is different from a lower layer in helical pitch; a circularly polarized separated plate comprising a close contact laminate of two or more cholesteric liquid crystal polymer layers in which an upper layer is different from a lower layer in helical pitch, the laminate having a mixed layer of cholesteric liquid crystal polymers forming the upper and lower layers, which is different from the upper and lower layers in helical pitch, in a close contact interface thereof to provide multistage changes in helical pitch in the direction of thickness; an optical element in which the circularly polarized separated plate is provided with at least one of a 1/4 wavelength plate and a polarizer; a polarization light source device comprising the circularly polarized separated plate or optical element on a light outgoing side of a light pipe; and a liquid crystal display comprising the circularly polarized separated plate, optical element or polarization light source device on a visual back face side of a liquid crystal cell.
    • 公开了一种用于制造圆偏光分离板的方法,其包括用不同种类的胆甾醇型液晶聚合物涂覆取向的胆甾醇型液晶聚合物层,并将得到的涂层热定向或相互热压取向的胆固醇液晶聚合物层 或者通过其中溶解有胆甾醇型液晶聚合物的挥发性液体或挥发性液体彼此相对地取向胆固醇型液晶聚合物层,从而形成两层以上胆甾型液晶聚合物层的紧密接触层叠体,其中上层 与螺旋节距的下层不同; 圆偏振分离板,其包含两层或多层胆甾型液晶聚合物层的紧密接触层压体,其中上层与螺旋间距的下层不同,所述层压板具有形成上下的胆固醇型液晶聚合物的混合层 层,其与螺旋间距的上层和下层不同,在其紧密接触界面中,以在厚度方向上提供螺旋间距的多级变化; 其中所述圆偏振分离板设置有+ E,fra 1/4 + EE波长板和偏振器中的至少一个的光学元件; 偏振光源装置,其在光管的光出射侧包括圆偏振分离板或光学元件; 以及液晶显示器,其包括在液晶单元的视觉背面侧上的圆偏振分离板,光学元件或偏振光源装置。
    • 28. 发明授权
    • Polarizing element, optical element, polarized light supply unit and liquid-crystal display device
    • 偏光元件,光学元件,偏振光供给单元和液晶显示装置
    • US06795139B1
    • 2004-09-21
    • US09571862
    • 2000-05-16
    • Tadayuki KameyamaHironori Motomura
    • Tadayuki KameyamaHironori Motomura
    • G02F11335
    • G02F1/133621G02B5/3033G02F1/133536G02F1/133615
    • A liquid-crystal display device having a polarizing element, an optical element, a polarized light supply unit, and liquid-crystal cells. The polarizing element has a function of separating natural light into reflected or transmitted light composed of polarized light, wherein a half-reflecting wavelength in each position in a surface of the polarizing element ranges within ±10 nm relative to a half-reflecting average wavelength when the half-reflecting wavelength is a wavelength which is located at a long or short wave side of a wavelength exhibiting maximum reflectivity on the basis of a spectrum of reflected light in a predetermined wave range in which the natural light is separated into the reflected light and the transmitted light, and which exhibits reflectivity of 50% with respect to the maximum reflectivity, and the half-reflecting average wavelength is an average of half-reflecting wavelengths in the surface. The optical element has a laminate of the polarizing element and an absorption type polarizing plate. The polarized light supply unit has a surface light source provided with a reflection layer, and either one of the polarizing element and the optical element disposed above the surface light source. The liquid-crystal cells are disposed on the light output side of the polarized light supply unit.
    • 具有偏振元件,光学元件,偏振光供给单元和液晶单元的液晶显示装置。 偏光元件具有将自然光分离成由偏振光构成的反射或透射光的功能,其中偏振元件的表面中每个位置的半反射波长相对于半反射平均波长为±10nm以内, 半反射波长是在自然光被分离成反射光的预定波长范围内的基于反射光的光谱的波长呈现出最大反射率的波长的长波长或短波侧的波长, 透射光,相对于最大反射率显示出50%的反射率,半反射平均波长是表面的半反射波长的平均值。 光学元件具有偏振元件和吸收型偏振片的层压体。 偏振光供给单元具有设置有反射层的面光源,并且偏振元件和光学元件中的任一个设置在表面光源的上方。 液晶单元设置在偏振光供给单元的光输出侧。
    • 29. 发明授权
    • Illumination device and/or a liquid crystal display device
    • 照明装置和/或液晶显示装置
    • US06724446B2
    • 2004-04-20
    • US10067997
    • 2002-02-08
    • Hironori MotomuraNaoki Takahashi
    • Hironori MotomuraNaoki Takahashi
    • G02F11335
    • G02B6/0056G02B6/0055G02F1/133536
    • There is provided an illuminator having a planar light source unit having reflectance of from 50 to 90% with respect to light in a state in which the light is emitted from a light source provided separately from the planar light source and incident on the planar light source unit, and a reflective type polarizer disposed on a light exit side of the planar light source unit so that a reflected light component and a transmitted light component of polarized light can be obtained from natural light incident on the reflective type polarizer. There is provided a liquid-crystal display device having an illuminator defined above, and a liquid-crystal display panel disposed on an upper side of the reflective type polarizer in the illuminator.
    • 在从与平面光源分开设置的光源发光的状态下,具有相对于光的反射率为50〜90%的平面光源单元的照明器,入射到平面光源 单元,以及设置在平面光源单元的光出射侧的反射型偏振器,从而可以从入射在反射型偏振器上的自然光获得偏振光的反射光分量和透射光分量。 提供了一种具有上述定义的照明器的液晶显示装置,以及设置在照明器中的反射型偏振器的上侧的液晶显示面板。
    • 30. 发明授权
    • Optic element, illumination device and/or liquid-crystal display device
    • 光学元件,照明装置和/或液晶显示装置
    • US06654081B2
    • 2003-11-25
    • US10067994
    • 2002-02-08
    • Ikuo KawamotoHironori MotomuraNaoki Takahashi
    • Ikuo KawamotoHironori MotomuraNaoki Takahashi
    • G02F113357
    • G02F1/13362G02F1/133528G02F2001/133543
    • There is provided an optical element having: a laminate including a reflective type polarizer for separating incident light into polarized light components through reflection and transmission, and a dichromatic polarizer, wherein a variation of hue between two points calculated by the expression: {(x2−x1)2+(y2−y1)2} is not larger than 0.06 when x1 and y1 express a hue at a point with a predetermined elevation angle and any azimuth angle, and x2 and y2 express a hue at another point with the same elevation angle and a changed azimuth angle in the case where transmitted light is obliquely viewed in the condition that the laminate is disposed on a planar light source so that the reflective type polarizer is located in an inner side. An illuminator having the above planar light source and laminate and including a reflection layers on its rear surface side, is disposed behind a liquid crystal cell.
    • 提供了一种光学元件,其具有:包括反射型偏振器的层叠体,用于通过反射和透射将入射光分离成偏振光分量;以及二色偏振器,其中由以下表达式计算的两个点之间的色调变化:{(x2- 当x1和y1在具有预定仰角和任何方位角的点表示色调时,x1和x2不能大于0.06,而x2和y2表示另一点的色相 在层叠体设置在平面光源上的情况下倾斜地观察透射光的情况下具有相同的仰角和改变的方位角,使得反射型偏振器位于内侧。 具有上述平面光源并且在其后表面侧包括反射层的层叠体的照明器设置在液晶单元的后面。