Lens sheet and rear projection screen including the same

Details Lens sheet and rear projection screen including the same Lens sheet and rear projection screen including the same

2005-09-06

2005-09-06

Koval, Melissa J (Department: 2851)

Optical: systems and elements

Projection screen

Embedded particles

Reexamination Certificate

active

06940644

ABSTRACT:
A lens sheet capable of preventing reflection of extraneous light without decreasing extraneous light absorption, having extraneous light absorbers that can be readily formed by printing and are scarcely stained. The present invention also provides a rear projection screen including such a lens sheet. A rear projection screen has a Fresnel lens sheet and a lenticular lens sheet placed on the viewing side of the Fresnel lens sheet. The lenticular lens sheet has lenses formed on those portions of the light-emergent-side surface of the sheet-shaped substrate part through which light converged by other lenses pass, and extraneous light absorbers formed on those portions of the light-emergent-side surface of the sheet-shaped substrate part through which light converged by the other lenses does not pass. Each extraneous light absorber includes a black-colored binder resin and a number of light-diffusing particles subjected to coloring treatment, incorporated in the binder resin.

REFERENCES:
patent: 5066099 (1991-11-01), Yoshida et al.
patent: 5815313 (1998-09-01), Mitani et al.
patent: 6307675 (2001-10-01), Abe et al.
patent: 2002/0077402 (2002-06-01), Chiang et al.
patent: 2004/0001993 (2004-01-01), Kinkelaar et al.
patent: 5-34829 (1993-02-01), None
patent: 5-134318 (1993-05-01), None
patent: 8-190150 (1996-07-01), None

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