Optical: systems and elements – Projection screen – Moving during projection
Reexamination Certificate
2011-06-14
2011-06-14
Mahoney, Christopher (Department: 2862)
Optical: systems and elements
Projection screen
Moving during projection
C359S457000
Reexamination Certificate
active
07961389
ABSTRACT:
There is provided a screen and a projector using a simple configuration and operation to make speckles less visible. A screen10on which light beams are incident includes a lenticular lens11as a first layer having viewing angle control means for enlarging the viewing angle and a Fresnel lens12as a second layer having angular conversion means for converting the angles of incidence of the incident light beams into the substantially same direction. One of the first and second layers has a diffusion capability that diffuses the incident light beams and has moving means for moving that layer relative to the other. Alternatively, the first and second layers both have the diffusion capability, and at least one of the layers has moving means for moving that layer relative to the other.
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Morikuni Eiji
Seki Hideya
Shinbo Akira
Mahoney Christopher
Oliff & Berridg,e PLC
Seiko Epson Corporation
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