Day and night film

Details Day and night film Day and night film

2005-12-08

2008-09-02

Nguyen, Thong (Department: 2872)

Optical: systems and elements

Glare or unwanted light reduction

With absorption means

C359S601000, C359S613000

Reexamination Certificate

active

07419272

ABSTRACT:
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.

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