Transmission type projection screen

Details Transmission type projection screen Transmission type projection screen

1997-06-03

1998-04-28

Malley, Daniel P.

Optical: systems and elements

Projection screen

Unitary sheet comprising plural refracting areas

359455, G03B 2160

Patent

active

057452881

ABSTRACT:
A transmission type projection screen is provided with a transparent film attached adhesively to only opaque or shading parts formed on top surfaces of ridges provided on the front surface of a lens sheet. The lens sheet is provided on its rear surface with a plurality of lenses for condensing light projected by a light source. The shading parts do not receive the light condensed by the plurality of lenses. The film protects the front surface of the lens sheet of the screen, and prevents scattering of the lens sheet in fragments when the lens sheet is cracked.

REFERENCES:
patent: 4108540 (1978-08-01), Anderson et al.
patent: 5066099 (1991-11-01), Yoshida et al.
patent: 5111337 (1992-05-01), Martinez
patent: 5296922 (1994-03-01), Mitani et al.
patent: 5307205 (1994-04-01), Ludwig, Jr. et al.
patent: 5426531 (1995-06-01), Tsukogoshi

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