Reflection type screen

Details Reflection type screen Reflection type screen

2004-04-27

2008-03-25

Mahoney, Christopher (Department: 2862)

Optical: systems and elements

Projection screen

With reflector or additional screen

C359S455000

Reexamination Certificate

active

07349154

ABSTRACT:
The reflection type screen comprises a reflection layer which is disposed on the opposite side to the projected light incident side of the screen, a horizontal view angle increasing layer which is disposed on the light incident side of the reflection layer, and a diffusion layer which is disposed on the light incident side of the horizontal view angle increasing layer. The horizontal view angle increasing layer has an array of convex ridges which are raised in a rear direction of the screen. Since the longitudinal direction of the ridges is aligned with the vertical direction of the screen, the view angle characteristics of the screen in a horizontal direction are improved and the diffusion characteristics of the screen in a vertical direction can be suppressed for preventing external disturbing light from an upper illumination light from being reflected toward the observers.

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