Diffuser panel for rear projection screen and such rear...

Details Diffuser panel for rear projection screen and such rear... Diffuser panel for rear projection screen and such rear...

2006-08-29

2006-08-29

Perkey, W. B. (Department: 2851)

Optical: systems and elements

Projection screen

Rear projection screen

C359S457000, C359S449000, C359S454000, C359S459000

Reexamination Certificate

active

07099079

ABSTRACT:
A plurality of reflecting mirrors (322) extending in the vertical direction of a screen are provided in parallel as appropriate between a light incident surface and a light exiting surface. The reflecting mirrors (322) each have a shape of parabolic cylinder, for condensing light on substantially one line. Light rays (L2) are reflected from a concave mirror part on the inner surface of one of the reflecting mirrors (322), and are reflected again from a convex mirror part of an adjacent one of the reflecting mirrors (322), to be emitted to the outside. Being reflected from the inner surface of one of the reflecting mirrors (322), the light rays (L2) are condensed on a predetermined focal point (FP1), and are then emitted while diffusing. Thus obtained is a diffuser panel for a rear projection screen capable of contributing to improved clarity of images.

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