Reflection projection screen

Details Reflection projection screen Reflection projection screen

2005-01-11

2005-01-11

Mahoney, Christopher (Department: 2851)

Optical: systems and elements

Projection screen

With reflector or additional screen

Reexamination Certificate

active

06842282

ABSTRACT:
A front projection screen (S) has a front shading sheet (5) facing a viewing side (A), and formed of a transparent material. The front shading sheet (5) has a front surface facing the viewing side (A), provided with a plurality of horizontal, parallel, minute ridges (8) having a triangular cross section and each having an upper side surface coated with a shading layer (9). A transparent filler layer (13) of a material having a refractive index nearly equal to that of the transparent material of the front shading sheet (5) is formed on the rear surface (4) of the front shading sheet (5), transparent glass beads (12) are embedded uniformly in a plane in the rear surface of the transparent filler layer (13), the rear surface of the transparent filler layer (13) is coated with a white, reflecting adhesive layer (11), and an opaque film (10) impermeable to light is applied to the rear surface of the reflecting adhesive layer (11). Horizontal end parts of an image displayed on the front projection screen (S) do not become dark, the front projection screen (S) has a large viewing angle, does not reflect an environmental image even in a light environment, and is capable of displaying a high-definition image having a high black level and a high contrast.

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