Day and night film
    1.
    发明授权
    Day and night film 有权
    昼夜电影

    公开(公告)号:US07419272B2

    公开(公告)日:2008-09-02

    申请号:US11297615

    申请日:2005-12-08

    IPC分类号: G02B27/00

    摘要: An optical element having a front side and a back side operates in an ambient lit mode and a backlit mode. The optical element includes a diffusely reflecting layer facing the front side for reflecting ambient light. A light absorbing layer faces the back side and is positioned to prevent back light from illuminating the diffusely reflecting layer. A plurality of light transmitting regions extend through the light absorbing layer and the diffusely reflecting layer for permitting back light to pass through in a restricted angular range without illuminating the diffusely reflecting layer.

    摘要翻译: 具有前侧和后侧的光学元件在环境照明模式和背光模式下操作。 光学元件包括面向前侧的漫反射层,用于反射环境光。 光吸收层面向后侧并且被定位成防止背光照射漫反射层。 多个透光区域延伸穿过光吸收层和漫反射层,以允许背光在受限的角度范围内通过而不照射漫反射层。