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    • 7. 发明申请
    • Liquid Crystal Projector
    • 液晶投影仪
    • US20080043158A1
    • 2008-02-21
    • US11571368
    • 2005-06-13
    • Yasuhiro ShirasakaHitoshi InukaiTomoya Yano
    • Yasuhiro ShirasakaHitoshi InukaiTomoya Yano
    • G02F1/1335
    • G03B21/28G02F1/13363G02F1/1393G02F2203/01G02F2413/01G02F2413/10G03B21/2073H04N9/3105H04N9/3167
    • Disclosed is a transmissive liquid crystal projector carrying a vertical alignment liquid crystal device. The liquid crystal projector includes a liquid crystal panel (25), on the light incident side and on the light radiating side of which a light incident side polarizing plate (24) and a light radiating side light polarizing plate (26) are arranged, respectively. A first polarized light component in a light beam collected by an illuminating optical system is transmitted through the light incident side polarizing plate (24) and routed to the liquid crystal panel (25). An optical anisotropic device (45), tilted by a preset angle correlated with the direction of alignment of liquid crystal molecules in the liquid crystal panel (25), that is, a pre-tilt angle, is arranged between the light incident side polarizing plate (24) and the liquid crystal panel (25) or between the light radiating side light polarizing plate (26) and the liquid crystal panel (25). By so doing, a high contrast ratio may be maintained, while transmittance of the liquid crystal panel may be improved.
    • 公开了一种携带垂直取向液晶装置的透射式液晶投影仪。 液晶投影仪分别在光入射侧和光入射侧分别配置有光入射侧偏振片(24)和光照射侧光偏振片(26)的液晶面板(25) 。 由照明光学系统收集的光束中的第一偏振光分量透射通过光入射侧偏振板(24)并被引导到液晶面板(25)。 将与液晶面板(25)中的液晶分子的取向方向相关的倾斜预定角度即预倾角的光学各向异性装置(45)配置在光入射侧偏光板 (24)和液晶面板(25)之间或者在发光侧光偏振片(26)和液晶面板(25)之间。 通过这样做,可以保持高对比度,同时可以提高液晶面板的透射率。
    • 8. 发明授权
    • Liquid crystal projector
    • 液晶投影仪
    • US07659946B2
    • 2010-02-09
    • US11571368
    • 2005-06-13
    • Yasuhiro ShirasakaHitoshi InukaiTomoya Yano
    • Yasuhiro ShirasakaHitoshi InukaiTomoya Yano
    • G02F1/1335
    • G03B21/28G02F1/13363G02F1/1393G02F2203/01G02F2413/01G02F2413/10G03B21/2073H04N9/3105H04N9/3167
    • Disclosed is a transmissive liquid crystal projector carrying a vertical alignment liquid crystal device. The liquid crystal projector includes a liquid crystal panel (25), on the light incident side and on the light radiating side of which a light incident side polarizing plate (24) and a light radiating side light polarizing plate (26) are arranged, respectively. A first polarized light component in a light beam collected by an illuminating optical system is transmitted through the light incident side polarizing plate (24) and routed to the liquid crystal panel (25). An optical anisotropic device (45), tilted by a preset angle correlated with the direction of alignment of liquid crystal molecules in the liquid crystal panel (25), that is, a pre-tilt angle, is arranged between the light incident side polarizing plate (24) and the liquid crystal panel (25) or between the light radiating side light polarizing plate (26) and the liquid crystal panel (25). By so doing, a high contrast ratio may be maintained, while transmittance of the liquid crystal panel may be improved.
    • 公开了一种携带垂直取向液晶装置的透射式液晶投影仪。 液晶投影仪分别在光入射侧和光入射侧分别配置有光入射侧偏振片(24)和光照射侧光偏振片(26)的液晶面板(25) 。 由照明光学系统收集的光束中的第一偏振光分量透射通过光入射侧偏振板(24)并被引导到液晶面板(25)。 将与液晶面板(25)中的液晶分子的取向方向相关的倾斜预定角度即预倾角的光学各向异性装置(45)配置在光入射侧偏光板 (24)和液晶面板(25)之间或者在发光侧光偏振片(26)和液晶面板(25)之间。 通过这样做,可以保持高对比度,同时可以提高液晶面板的透射率。