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    • 4. 发明授权
    • Light controlling apparatus
    • 灯光控制装置
    • US06456345B1
    • 2002-09-24
    • US09301557
    • 1999-04-29
    • Koichi Ise
    • Koichi Ise
    • G02F13335
    • G02F1/13475G02F1/133528
    • A light controlling apparatus comprises a GH cell and a polarizing plate. The polarizing plate is attached to an iris blade, and movable inside/outside the effective optical path of the light incident to the GH cell. The iris blades are driven by a motor not shown in the drawing to overlap each other, and at the time, the polarizing plate is moved inside the effective optical path to cover the aperture. If the brightness of an object increases more, the GH cell absorbs the light to control the light. Because the polarizing plate is movable outside the effective optical path of the light, the light is not absorbed by the polarizing plate, and the maximum transmittance of the light controlling apparatus is increased, therefore the contrast ratio is increased and the light quantity is maintained uniform.
    • 光控制装置包括GH电池和偏振片。 偏振片安装在虹膜叶片上,可以在入射到GH细胞的光的有效光路内/外移动。 虹膜叶片由图中未示出的马达驱动,彼此重叠,此时偏振板在有效光路内移动以覆盖孔。 如果物体的亮度增加,GH细胞吸收光线来控制光线。 由于偏振板可以在光的有效光路外移动,所以光不被偏振片吸收,并且光控制装置的最大透射率增加,因此对比度增加并且光量保持均匀 。