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公开(公告)号：US5208620A
公开(公告)日：1993-05-04
申请号：US718908
申请日：1991-06-24
CPC分类号： H04N5/7408 , G03B21/10
摘要： A display apparatus comprises a projecting device for projecting an image, with the projecting device having a projection optical system having a limited pupil diameter and screen device arranged at a position where an image is substantially projected by the projecting device. The screen device has at least two sheets in each of which a number of prisms extending like a straight line or a curve are formed on the surface on the side opposite to the projecting device. Each of the prisms has an effective portion for allowing a light flux from the projecting device to be emitted in a predetermined direction and a non-effective portion which does not contribute to the emission of the light flux in the predetermined direction, and wherein the non-effective portions of another one or a plurality of the other sheets among the plurality of sheets excluding the sheet arranged at the nearest position on the projecting device side are formed so as to have an almost intermediate angle between the angle of a principal ray when a light flux from the projecting device progresses in the sheets and the emission angle of the principal ray when it is emitted from effective surfaces of the prisms of the sheets.
摘要翻译： 显示装置包括用于投影图像的投影装置，其中投影装置具有具有有限瞳孔直径的投影光学系统和布置在图像基本上由投影装置投影的位置处的屏幕装置。 屏幕装置具有至少两个片材，每个片材在与投影装置相对的一侧上的表面上形成有直线或曲线延伸的多个棱镜。 每个棱镜具有用于允许来自投影装置的光束沿预定方向发射的有效部分和对预定方向上的光束的发射无贡献的非有效部分，并且其中， 除了布置在突出装置侧的最靠近的位置的纸张之外的多个纸张中的另一个或多个其他纸张的有效部分被形成为具有当主要光线的角度之间几乎中间的角度 当从片材的棱镜的有效表面发射时，来自投影装置的光通量在片材中进行并且主光线的发射角度发生。
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公开(公告)号：US5153752A
公开(公告)日：1992-10-06
申请号：US658046
申请日：1991-02-20
IPC分类号： G02F1/13 , G02B27/28 , G02F1/1335 , G02F1/13357 , G03B33/12 , H04N5/74 , H04N9/31
CPC分类号： H04N9/3167
摘要： A liquid crystal type video projector is disclosed which has a reflection type optical modulator for effective use of beams from a radiation source such as a lamp or the like. The projector further comprises means for modulating the plane of polarization of a polarized beam entering the radiation source and for reflecting the polarized beam, thereby causing a reflection beam and an optical arrangement. The optical arrangement includes a first polarizing beam splitter for separating the beam from the radiation source into P and S polarized components and for directing the S polarized component to the modulator and a converter for rotating the plane of polarization of the P polarized component and converting into another S polarized component for enhanced efficiency of beam utilization. It further includes a second polarizing beam splitter for reflecting the other S polarized component and directing the other S polarized component and directing to the modulator. The polarizing beam splitters are caused to act as an analyzer for colored reflected beams via a dichroic mirror system.
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3.发明授权Screen and image display apparatus which minimizes the effects of re-reflected incident light 失效屏幕和图像显示装置，其使再反射的入射光的影响最小化
公开(公告)号：US5146365A
公开(公告)日：1992-09-08
申请号：US442722
申请日：1989-11-29
CPC分类号： G03B21/28 , G03B21/10 , G03B21/625 , H04N5/7408
摘要： A back projection type screen having a screen portion to be disposed at a position whereat an image projected from image projector means is formed, the screen portion being formed by at least one transparent sheet, the screen portion having a vertical direction and a horizontal direction in parallel to the surface of the transparent sheet, and a light diffusing portion formed on the light beam incidence side surface of the transparent sheet which is next to the light beam incidence side of the screen portion, the light diffusing portion transmitting an incident light therethrough and also diffusing reflected light in the vertical direction and the horizontal direction. The specification also discloses an image display apparatus using such screen.
摘要翻译： 一种背投影式屏幕，其具有设置在从图像投影仪装置投影的图像的位置处的屏幕部分，所述屏幕部分由至少一个透明片形成，所述屏幕部分具有垂直方向和水平方向 平行于透明片的表面的光漫射部分和形成在屏幕部分的光束入射侧旁边的透明片的光束入射侧表面上的光漫射部分，光漫射部分透射入射光， 还在垂直方向和水平方向上扩散反射光。 本说明书还公开了使用这种屏幕的图像显示装置。
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公开(公告)号：US5100222A
公开(公告)日：1992-03-31
申请号：US559371
申请日：1990-07-27
IPC分类号： G03B21/62
CPC分类号： G03B21/625
摘要： A screen is disposed in the position at which an image is formed by an image projector. The screen comprises a transparent sheet having a longitudinal direction and a latitudinal direction, and a fresnel lens surface formed on one surface of the transparent sheet to condense a light beam entered thereinto and emit the condensed light beam, the focal length of the Fresnel lens surface in the longitudinal direction of said transparent sheet being shorter than that in the latitudinal direction of the sheet.
摘要翻译： 屏幕被布置在由图像投影仪形成图像的位置。 屏幕包括具有纵向方向和纬向的透明片，以及形成在透明片的一个表面上的菲涅尔透镜表面，以冷凝入射到其中的光束并发射聚光束，菲涅尔透镜表面的焦距 在所述透明片的长度方向上比片材的纬向短。
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公开(公告)号：US5690772A
公开(公告)日：1997-11-25
申请号：US268870
申请日：1994-06-30
CPC分类号： G02B3/08 , Y10T156/1052 , Y10T156/1057 , Y10T156/1069
摘要： A method for mass-producing eccentric Fresnel lens sheets comprising the steps of: preparing a number of concentric Fresnel lens sheets; dividing the concentric Fresnel lens sheets into a first set and a second set each including a plurality of Fresnel lens sheets; cutting out a plurality of first sheets each corresponding to one portion of the eccentric Fresnel lens sheet from each of the Fresnel lens sheets of the first set; cutting out a plurality of second sheets each corresponding to the other portion of the eccentric Fresnel lens sheet from each of the Fresnel lens sheets of the second set; and bonding each of the first sheets and each of the second sheets in such a manner that patterns on the first sheet and the second sheet are continuous to prepare a plurality of eccentric Fresnel lens sheet. The second set can include a third set and a fourth set and a plurality of third sheets are cut out from the third set and a plurality of fourth sheets are cut out from the fourth set. The third sheets and fourth sheets are bonded to the first sheets. The first sheets are relatively large rectangular sheets and the second sheets are small rectangular sheets.
摘要翻译： 一种批量生产偏心菲涅耳透镜片的方法，包括以下步骤：制备多个同心的菲涅尔透镜片; 将同心菲涅耳透镜片分成第一组和第二组，每组包括多个菲涅尔透镜片; 从第一组的菲涅耳透镜片中的每一个切出与偏心菲涅尔透镜片的一部分相对应的多个第一片; 从第二组的菲涅耳透镜片中的每一个切出与偏心菲涅耳透镜片的另一部分相对应的多个第二片; 并且以使得第一片材和第二片材上的图案连续的方式接合每个第一片材和每个第二片材以制备多个偏心菲涅尔透镜片材。 第二组可以包括第三组和第四组，并且从第三组切出多个第三片，并且从第四组切出多个第四片。 第三片和第四片结合到第一片。 第一片是相对大的矩形片，第二片是小矩形片。
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公开(公告)号：US5390050A
公开(公告)日：1995-02-14
申请号：US86359
申请日：1993-07-06
CPC分类号： B29D11/00269 , G02B3/08 , Y10S359/90 , Y10S425/808
摘要： An eccentric Fresnel lens is formed from a concentric Fresnel lens sheet or Fresnel lens sheet mold. The concentric Fresnel lens sheet or mold is cut to produce an eccentric Fresnel lens having a center offset from the optical axis of the concentric Fresnel lens.
摘要翻译： 偏心菲涅耳透镜由同心的菲涅耳透镜片或菲涅尔透镜片模制成。 同心的菲涅尔透镜片或模具被切割以产生具有与同心菲涅尔透镜的光轴偏移的中心的偏心菲涅耳透镜。
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公开(公告)号：US5191472A
公开(公告)日：1993-03-02
申请号：US442723
申请日：1989-11-29
CPC分类号： G02B3/005 , G02B27/0018 , G02B3/0068 , G02B3/06 , G02B3/08 , G03B21/10 , G03B21/625
摘要： An image display apparatus comprises an image projection system having a projecting optical system, and a screen for displaying an image by receiving the image light deflected by a mirror system. The screen has a plurality of sheets one of which contains a group of cylindrical lenses which act as light transmitting areas and light blocking areas arranged on an image light exit plane along the direction of arrangement of the cylindrical lenses. The screen arrangement is capable of blocking undesirable reflected light.
摘要翻译： 图像显示装置包括具有投影光学系统的图像投影系统和通过接收由镜像系统偏转的图像光来显示图像的屏幕。 屏幕具有多个片材，其中一个片材包含一组柱面透镜，其作为透光区域和沿着柱面透镜的排列方向布置在图像光出射平面上的遮光区域。 屏幕布置能够阻挡不期望的反射光。
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公开(公告)号：US5540858A
公开(公告)日：1996-07-30
申请号：US304938
申请日：1994-09-13
申请人： Kazuo Yoshinaga , Hidetoshi Suzuki , Katsumi Kurematsu , Yomishi Toshida , Toshikazu Ohnishi , Hideaki Mitsutake , Nobuo Minoura , Koichi Sato , Takeo Eguchi
发明人： Kazuo Yoshinaga , Hidetoshi Suzuki , Katsumi Kurematsu , Yomishi Toshida , Toshikazu Ohnishi , Hideaki Mitsutake , Nobuo Minoura , Koichi Sato , Takeo Eguchi
CPC分类号： C09K19/3804 , C09K19/3809 , C09K19/544
摘要： A liquid crystal device is constituted by disposing a display layer between a pair of electrode plates. The display layer comprises a mesomorphic polymer and a low-molecular weight mesomorphic compound. The mesomorphic polymer may preferably be a main chain-type ferroelectric mesomorphic polymer having an ester linkage or a mesomorphic polymer derived from a polymerizable mesomorphic compound. The display layer may preferably comprise a ferroelectric mesomorphic polymer having a dielectric anisotropy .DELTA..epsilon. of -3.0 or below and a low-molecular weight mesomorphic compound incompatible with the mesomorphic polymer and having a positive dielectric anisotropy.
摘要翻译： 通过在一对电极板之间设置显示层来构成液晶装置。 显示层包括介晶聚合物和低分子量介晶化合物。 介晶聚合物可以优选为具有酯键的衍生自具有酯键的主链型铁电介晶聚合物或衍生自可聚合介晶化合物的介晶聚合物。 显示层可以优选包含具有-3.0以下的介电各向异性DELTAε和与介晶聚合物不相容并具有正介电各向异性的低分子量介晶化合物的铁电介晶聚合物。
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公开(公告)号：US5631750A
公开(公告)日：1997-05-20
申请号：US212284
申请日：1994-03-14
IPC分类号： G02B3/00 , G02F1/1335 , G02F1/137 , H04N5/74 , H04N9/31 , G02F1/1333
CPC分类号： H04N9/315 , G02B3/0006 , G02B3/005 , G02B3/0056 , G02B3/0062 , G02B3/0068 , G02F1/133526 , H04N5/7441 , H04N9/3105 , G02F2001/13756
摘要： A liquid crystal device for controlling scattering of light beams incident upon a liquid crystal layer so as to modulate the light beams includes: a first lens array having lenses corresponding to the liquid crystal layer, the lenses causing the light beams transmitted from the liquid crystal layer, the lenses causing the light beams transmitted from the liquid crystal layer to travel toward a focal plane; a mask for shielding scattered light transmitted from the first lens array as well as allowing non-scattered light to pass through, the mask having a plurality of aperture portions which are formed along the focal plane to correspond to the lenses of the first lens array so as to allow non-scattered light transmitted from corresponding lenses to pass through; and a second lens array having lenses arranged to correspond to the aperture portions of the mask, the lenses substantially collimating the non-scattered light transmitted from corresponding aperture portions of the mask.
摘要翻译： 用于控制入射在液晶层上以调制光束的光束的散射的液晶装置包括：具有与液晶层相对应的透镜的第一透镜阵列，使得从液晶层透射的光束的透镜 使从液晶层透射的光束朝向焦平面移动的透镜; 用于屏蔽从第一透镜阵列透射的散射光以及允许非散射光通过的掩模，所述掩模具有沿焦平面形成的多个孔径部分，以对应于第一透镜阵列的透镜，因此 以允许从相应透镜透射的非散射光通过; 以及第二透镜阵列，其具有与所述掩模的开口部对应的透镜，所述透镜基本上准直由所述掩模的相应的孔部传输的非散射光。
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公开(公告)号：US5446510A
公开(公告)日：1995-08-29
申请号：US328406
申请日：1994-10-24
IPC分类号： G02B27/28 , G02F1/1335 , G02F1/13357 , H04N9/31 , G03B21/28
CPC分类号： H04N9/3167 , G02B27/283 , H04N9/3105 , G02F1/133536 , G02F1/13362 , G02F2001/13355
摘要： An image display apparatus has a radiation source, generator for generating an image by modulating a polarized light beam and directing device for directing a light beam from the radiation source toward the generator. The directing device has a conversion optical system for converting the beam from the radiation source into the polarized light beam. The conversion optical system has a polarizing beam splitter for splitting the beam from the radiation source into a first and second beams. In the conversion optical system, a 1/4 wavelength plate and a mirror are arranged so that the plane of polarization of the first beam is rotated to generate a third beam with the plane of polarization same as that of the second beam. The third beam is directed toward the generator through the polarizing beam splitter while the second beam is also directed toward the generator.
摘要翻译： 图像显示装置具有辐射源，发生器，用于通过调制偏振光束并引导用于将来自辐射源的光束引向发生器来产生图像。 引导装置具有用于将来自辐射源的光束转换成偏振光束的转换光学系统。 转换光学系统具有偏振分束器，用于将来自辐射源的光束分成第一和第二光束。 在转换光学系统中，配置1/4波长板和反射镜，使得第一光束的偏振面旋转以产生具有与第二光束的偏振面相同的第三光束。 第三束通过偏振分束器指向发生器，而第二光束也被引向发生器。
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