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    • 17. 发明授权
    • Optical assembly and projector
    • 光学组件和投影机
    • US07114811B2
    • 2006-10-03
    • US10951795
    • 2004-09-29
    • Jun AraiEijiro FujimoriHideyuki KobayashiShogo Kurosawa
    • Jun AraiEijiro FujimoriHideyuki KobayashiShogo Kurosawa
    • G03B21/14G03B21/02
    • H04N9/3105H04N9/3144H04N9/315
    • To provide an optical assembly capable of enhancing black level display while preventing deterioration of a WV film, and a projector assembled therewith, optical compensation elements are disposed before and after liquid crystal light valves, so that an unintended phase difference generated on the incident and emission sides of the liquid crystal light valves for individual colors is eliminated by adjusting the rotational positions of the optical compensation elements, thus enabling an enhancement in the contrast of a color image displayed on a transmission screen member. In case of B light including ultraviolet light in part, the optical compensation element is disposed at the subsequent stage of the liquid crystal light valve, so that as compared with when the optical compensation element is disposed at the preceding stage of the liquid crystal light valve, the optical compensation element can be reduced or prevented from deteriorating with age, thus enabling the contrast of image display to be maintained over a long period of time.
    • 为了提供能够增强黑电平显示同时防止WV膜劣化的光学组件和组装在其上的投影仪,光学补偿元件设置在液晶光阀之前和之后,使得在入射和发射时产生非预期的相位差 通过调整光学补偿元件的旋转位置来消除用于单独颜色的液晶光阀的侧面,从而能够增强显示在透射屏幕构件上的彩色图像的对比度。 在部分包含紫外光的B光的情况下,光学补偿元件配置在液晶光阀的后续阶段,使得与光学补偿元件配置在液晶光阀的前一级相比, ,可以减少或防止光学补偿元件随着年龄而劣化,从而能够在长时间内保持图像显示的对比度。