会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Projection display device
    • 投影显示设备
    • US07118227B2
    • 2006-10-10
    • US10470977
    • 2002-04-23
    • Shinya SannoheHideki IshinagaTakamasa Yoshikawa
    • Shinya SannoheHideki IshinagaTakamasa Yoshikawa
    • G03B21/14G03B21/28G02B26/02G02B9/08G02F1/00
    • G02B5/005G02B26/0833G03B21/005G03B21/006
    • An illuminating optical system for focusing a radiant light of a light source (1) onto a reflecting light valve (6) and a projection lens (7) for magnifying and projecting a reflected light from the reflecting light valve (6) onto a screen are provided, a diaphragm (31) is disposed at a substantially conjugate position of an entrance pupil of the projection lens (7) on an optical path of the illuminating optical system, the diaphragm (31) has an opening whose area is changed by a light-shielding member, and a shape of a shielded portion of the diaphragm (31) shielded by the light-shielding member is rotationally asymmetric to an optical axis (12) of the illuminating optical system. Accordingly, shielding of necessary light can be better avoided compared with a diaphragm for changing the light-shielding area in a rotationally symmetric manner, for example, a diaphragm for narrowing the opening concentrically, making it possible to improve contrast performance while minimizing brightness reduction.
    • 一种用于将光源(1)的辐射光聚焦到反射光阀(6)和用于将来自反射光阀(6)的反射光放大并投影到屏幕上的投影透镜(7))的照明光学系统, 设置在投影透镜(7)的入射光瞳的基本共轭位置处的照明光学系统的光路上的隔膜(31),隔膜(31)具有通过光改变面积的开口 并且由遮光部件遮蔽的隔膜31的遮蔽部的形状与照明光学系统的光轴(12)旋转不对称。 因此,与用于以旋转对称的方式改变遮光区域的隔膜例如用于同心地缩小开口的隔膜相比,可以更好地避免必要的光的屏蔽,使得可以在最小化亮度降低的同时提高对比度性能。