Lens sheets for rear projection screens

Details Lens sheets for rear projection screens Lens sheets for rear projection screens

2008-05-06

2008-05-06

Lee, Diane I. (Department: 2851)

Optical: systems and elements

Projection screen

Unitary sheet comprising plural refracting areas

C359S452000, C359S456000, C359S460000

Reexamination Certificate

active

11103458

ABSTRACT:
A lens sheet for use as a Fresnel lens sheet or a lenticular lens sheet of rear projection screens, which includes a plastic substrate and a lens element disposed on the plastic substrate. The plastic substrate includes at least a first surface layer, an intermediate layer and a second surface layer. Each of the first surface layer and the second surface layer has a saturated water absorptivity higher than that of the intermediate layer.

REFERENCES:
patent: 5675435 (1997-10-01), Ishii et al.
patent: 6088158 (2000-07-01), Kimura

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