Perforate projection screen with inconspicuous seams

Details Perforate projection screen with inconspicuous seams Perforate projection screen with inconspicuous seams

2005-06-02

2008-11-18

Lee, Diane I. (Department: 2851)

Optical: systems and elements

Projection screen

Curved

C359S459000, C359S443000, C052S081100

Reexamination Certificate

active

07453633

ABSTRACT:
A perforate projection screen for movies, planetariums and the like having inconspicuous seams and uniform reflectivity throughout its visible surface. The screen is made from a plurality of perforate panels and is mounted, when in use, with a dark non-reflective chamber behind the screen. Any overlapped areas of the panels and any frame members or other objects, in close proximity to the back of the panels are covered with a black velour type material to prevent light reflection from panel holes where objects are in close proximity to the back of the panel. The edges of adjacent panels overlap to form seams with the overlapped edges of the panels being crimped to form recesses to receive the overlapping edge strip of an adjacent panel, thereby hiding the overlapping panel edge to reduce shadow lines and make the panel edges inconspicuous to viewers.

REFERENCES:
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patent: 5011263 (1991-04-01), Hopper
patent: 5724775 (1998-03-01), Zobel et al.
patent: 04133043 (1992-05-01), None

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