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    • 9. 发明申请
    • Projection type display apparatus
    • 投影式显示装置
    • US20070252956A1
    • 2007-11-01
    • US11790256
    • 2007-04-24
    • Muneharu KuwataTomohiro Sasagawa
    • Muneharu KuwataTomohiro Sasagawa
    • G03B21/14
    • G03B21/28G03B21/62
    • In a projection type display apparatus includes an illumination device (including a light source), a light modulation element, a projection optical system that projects a modulated light from the light modulation element, and a screen onto which a projected light is projected. The projection optical system includes a refraction type optical system that refracts the modulated light from the light modulation element, and a hologram element disposed on a position remote from the screen and shifted in a direction parallel to the screen from a center of the screen. The hologram element projects the modulated light having passed through the refraction type optical system onto the screen so that a light ray of the center of the modulated light is inclined with respect to a normal line of the screen.
    • 在投影型显示装置中,包括照明装置(包括光源),光调制元件,投影来自光调制元件的调制光的投影光学系统以及投影投影光的屏幕。 投影光学系统包括:折射型光学系统,其折射来自光调制元件的调制光;以及全息元件,其设置在远离屏幕的位置,并从屏幕中心沿平行于屏幕的方向移位。 全息元件将已经通过折射型光学系统的调制光投射到屏幕上,使得调制光的中心的光线相对于屏幕的法线倾斜。