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    • 4. 发明授权
    • Projection-type image display apparatus
    • 投影式图像显示装置
    • US08955977B2
    • 2015-02-17
    • US13606748
    • 2012-09-07
    • Yutaka YamaguchiTakehito Kawasumi
    • Yutaka YamaguchiTakehito Kawasumi
    • G03B21/14G02B27/14G03B21/20G03B33/12H04N9/31G03B21/28
    • G02B27/145G03B21/2033G03B21/28G03B33/12H04N9/3105H04N9/3161H04N9/3167
    • A projection-type image display apparatus includes a color separation element including a color separation surface, a light modulation element configured to receive the light divided by the color separation element, a polarizing beam splitter disposed between the color separation element and a projection optical system to separate a light path of a light modulated by the light modulation element according to a polarization direction and guide the resulting light to the projection optical system, and a phase difference plate disposed between the color separation element and the light modulation element. An optic axis of the phase difference plate and the normal of the color separation surface are substantially parallel or perpendicular to each other, in a cross section parallel to a normal of the color separation surface and a normal of the light modulation element.
    • 一种投射型图像显示装置,包括:分色元件,包括分色面;光调制元件,被配置为接收由所述分色元件分割的光;偏振分束器,设置在所述分色元件与投影光学系统之间, 根据偏光方向分离由光调制元件调制的光的光路,并将所得到的光引导到投影光学系统,以及设置在分色元件和光调制元件之间的相位差板。 在平行于分色面的法线和光调制元件的法线的截面中,相差板的光轴和分色面的法线基本上平行或相互垂直。
    • 9. 发明申请
    • PROJECTION IMAGE DISPLAY APPARATUS
    • 投影图像显示设备
    • US20110025965A1
    • 2011-02-03
    • US12844232
    • 2010-07-27
    • Yutaka Yamaguchi
    • Yutaka Yamaguchi
    • G02F1/1335
    • H04N9/3167
    • A projection image display apparatus includes: light source; polarization/separation element having a polarization/separation plane through which one polarized light passes and which reflects the other orthogonal to the one; an image display element for modulating the incident light into image light and reflecting the image light; and a retardation plate disposed between the polarization/separation element and the image display element: the retardation plate has refractive indices different between two orthogonal directions in an optical surface thereof, and gives phase difference larger than λ/4 to polarized light entering the optical surface and having a wavelength λ; and supposing z axis be a normal to a light entering/exiting surface of the polarization/separation element, y axis be perpendicular to z axis and a normal to the polarization/separation plane, and x axis be perpendicular to z- and y-axes, the first retardation plate has optic axis within xz plane and tilted to x axis.
    • 投影图像显示装置包括:光源; 偏振/分离元件具有偏振/分离平面,一个偏振光通过该偏振/分离平面,并且反射另一个偏振光。 用于将入射光调制成图像光并反射图像光的图像显示元件; 以及设置在偏振/分离元件和图像显示元件之间的延迟板:延迟板在其光学表面中具有在两个正交方向之间的折射率不同,并且使偏离大于λ/ 4的相位差进入到光学表面的偏振光 并具有波长λ; 并且假设z轴与偏振/分离元件的光进/出表面垂直,y轴垂直于z轴并垂直于偏振/分离平面,x轴垂直于z轴和y轴 ,第一延迟板在xz平面内具有光轴并且倾斜到x轴。