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    • 7. 发明授权
    • Display apparatus
    • 显示装置
    • US5208620A
    • 1993-05-04
    • US718908
    • 1991-06-24
    • Hideaki MitsutakeNobuo MinouraKatsumi KurematsuHaruyuki Yanagi
    • Hideaki MitsutakeNobuo MinouraKatsumi KurematsuHaruyuki Yanagi
    • G03B21/10H04N5/74
    • H04N5/7408G03B21/10
    • 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.
    • 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。
    • 10. 发明授权
    • Method for mass-producing eccentric Fresnel lens sheets
    • 批量生产偏心菲涅耳透镜片的方法
    • US5690772A
    • 1997-11-25
    • US268870
    • 1994-06-30
    • Hideaki MitsutakeNobuo MinouraKatsumi KurematsuHaruyuki Yanagi
    • Hideaki MitsutakeNobuo MinouraKatsumi KurematsuHaruyuki Yanagi
    • G03B21/62G02B3/08B32B31/00
    • G02B3/08Y10T156/1052Y10T156/1057Y10T156/1069
    • 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.
    • 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。