Optical: systems and elements – Projection screen – Rear projection screen
Reexamination Certificate
2007-11-06
2007-11-06
Perkey, W. B. (Department: 2851)
Optical: systems and elements
Projection screen
Rear projection screen
C359S457000, C359S453000
Reexamination Certificate
active
11011771
ABSTRACT:
A method of manufacturing the lens substrate with straight light control portions1A that is provided with a plurality of convex lenses (microlenses)32on a surface thereof and is used so that light enters the lens substrate from the side of the surface thereof on which the plurality of convex lenses32are provided includes the steps of: preparing a substrate having a plurality of concave portions on one surface thereof; forming the plurality of convex lenses32using the substrate having the plurality of concave portions; and forming a straight light control portion4in the vicinity of the apex of each of the plurality of convex lenses32. The straight light control portion4is used for controlling the ratio of straight light in the light entering each of the plurality of convex lenses32.
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Communications from Korean and Chinese Patent Office re: related applications.
Communication from Japanese Patent Office re: related application.
Do Robert
Harness & Dickey & Pierce P.L.C.
Perkey W. B.
Seiko Epson Corporation
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