Transparent screen, projection display device, and image...

Details Transparent screen, projection display device, and image... Transparent screen, projection display device, and image...

2009-10-30

2011-10-11

Laballe, Clayton E (Department: 2862)

Optical: systems and elements

Projection screen

With reflector or additional screen

C359S452000, C359S589000

Reexamination Certificate

active

08035894

ABSTRACT:
A Fresnel lens screen20is comprised of a light entering surface partial total reflection type Fresnel lens24, a first light diffusing part26disposed behind the Fresnel lens, and a first base25. An image display element30disposed behind the Fresnel lens screen20has a lens element31, a second base32, and a third base35. Second light diffusing parts33are disposed behind the second base32. Each of the second light diffusing parts33includes two types of particulates having different particle sizes which are distributed therein.

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