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    • 1. 发明授权
    • Projection screen and projection display
    • 投影屏幕和投影显示
    • US07072109B2
    • 2006-07-04
    • US10496652
    • 2003-06-27
    • Masahiro GotoHitomu WatanabeYoshiki YoshidaHiroshi Sekiguchi
    • Masahiro GotoHitomu WatanabeYoshiki YoshidaHiroshi Sekiguchi
    • G03B21/56G02B3/08
    • G02B5/045G02B3/005G03B21/625
    • A projection screen 111 comprises a total reflection prism lens 114 and a lenticular lens 115 provided on the viewer's side of the total reflection prism lens 114. The total reflection prism lens 114 has a plurality of unit prisms 113 on its back surface (the outermost plane of incidence) on which imaging light L is incident. Each unit prism 113 has an apical angle λ that corresponds to the angle between the plane of incidence 113a and the plane of total reflection 113b, and the apical angles λ of the unit prisms 113 vary with the position of each unit prism 113 on the screen plane. In particular, the unit prisms 113 have apical angles λ varying continuously from 30° to 45° so that the apical angles λ on the side distant from the center O of the concentric circles are greater than the apical angles λ on the side close to this center O.
    • 投影屏幕111包括设置在全反射棱镜透镜114的观察者侧的全反射棱镜透镜114和双凸透镜115。 全反射棱镜透镜114在成像光L入射的背面(最外侧的入射面)上具有多个单位棱镜113。 每个单位棱镜113具有对应于入射平面113a和全反射面113b之间的角度的顶角λ,并且单位棱镜113的顶角λ随每个单位棱镜113的位置而变化 屏幕飞机。 特别地,单位棱镜113具有从30°至45°连续变化的顶角λ,使得在远离同心圆的中心O的一侧上的顶角λ大于靠近该侧的顶侧的顶角λ 中心O.
    • 5. 发明授权
    • Rear projection screen with uniformity of luminance
    • 背投屏幕亮度均匀
    • US06597502B2
    • 2003-07-22
    • US09922778
    • 2001-08-07
    • Yoshiki TakahashiMasahiro GotoHitomu WatanabeMakoto HondaKumpei OdaKatsunori Takahashi
    • Yoshiki TakahashiMasahiro GotoHitomu WatanabeMakoto HondaKumpei OdaKatsunori Takahashi
    • G03B2160
    • G03B21/625
    • A rear projection screen including a Fresnel lens sheet arranged on the projection side, and a lenticular lens sheet arranged on the observation side. The Fresnel lens sheet has a lenticular lens for vertical diffusion on its light-entering side. The lenticular lens for vertical diffusion contains a plurality of convex lenses that extend horizontally, and these plural convex lenses are arranged with a constant pitch. Further, the diffusion angle of the lenticular lens for vertical diffusion continuously increases, and, at the same time, the direction of diffusion is gradually inclined to the central part side as the distance from the central part toward each of the edges on the screen surface increases. The diffusion properties (the angle and direction of diffusion) of the lenticular lens thus continuously vary between the central part and edges of the screen surface.
    • 背投影屏幕,其包括布置在投影侧的菲涅耳透镜片和布置在观察侧的双凸透镜片。 菲涅耳透镜片具有用于在其光入侧的垂直扩散的双凸透镜。 用于垂直扩散的双凸透镜包含水平延伸的多个凸透镜,这些多个凸透镜以恒定的间距排列。 此外,用于垂直扩散的双凸透镜的扩散角度连续增加,并且同时扩散方向逐渐地向中心部分倾斜,这是从屏幕表面上的中心部分到每个边缘的距离 增加 双凸透镜的扩散特性(扩散角度和扩散方向)因此在屏幕表面的中心部分和边缘之间连续变化。
    • 6. 发明授权
    • Rear projection screen with uniformity of luminance
    • 背投屏幕亮度均匀
    • US06292294B1
    • 2001-09-18
    • US09253533
    • 1999-02-22
    • Yoshiki TakahashiMasahiro GotoHitomu WatanabeMakoto HondaKumpei OdaKatsunori Takahashi
    • Yoshiki TakahashiMasahiro GotoHitomu WatanabeMakoto HondaKumpei OdaKatsunori Takahashi
    • G03B2160
    • G03B21/625
    • A rear projection screen including a Fresnel lens sheet arranged on the projection side, and a lenticular lens sheet arranged on the observation side. The Fresnel lens sheet has a lenticular lens for vertical diffusion on its light-entering side. The lenticular lens for vertical diffusion containing a plurality of convex lenses that extend horizontally, and these plural convex lenses are arranged with a constant pitch. Further, the diffusion angle of the lenticular lens for vertical diffusion continuously increases, and, at the same time, the direction of diffusion is gradually inclined to the central part as the distance from the central part toward each of the edges on the screen surface increases. The diffusion properties (the angle and direction of diffusion) of the lenticular lens thus continuously vary between the central part and the edges of the screen surface.
    • 背投影屏幕,其包括布置在投影侧的菲涅耳透镜片和布置在观察侧的双凸透镜片。 菲涅耳透镜片具有用于在其光入侧的垂直扩散的双凸透镜。 用于垂直扩散的双凸透镜,其包含水平延伸的多个凸透镜,并且这些多个凸透镜以恒定的间距排列。 此外,双凸透镜对垂直扩散的扩散角度连续增加,同时,随着屏幕表面上的中心部分朝向每个边缘的距离,扩散方向逐渐向中心部分倾斜 。 因此,双凸透镜的扩散特性(扩散的角度和方向)在屏幕表面的中心部分和边缘之间连续变化。