Light-diffusing sheet

Details Light-diffusing sheet Light-diffusing sheet

2004-11-22

2009-08-18

Lavarias, Arnel C (Department: 2872)

Optical: systems and elements

Diffusing of incident light

C359S613000, C362S355000, C349S112000

Reexamination Certificate

active

07576914

ABSTRACT:
A light-diffusing sheet having a flat entrance surface and an exit surface parallel to the entrance surface, the light-diffusing sheet includes a sheet body, and a plurality of wedge-shaped parts, each being embedded on the side of the exit surface of the sheet body and expanding toward the exit surface. The wedge-shaped parts have a refractive index lower than that of the sheet body. Each of side surfaces of each of the wedge-shaped parts is formed of inclined surfaces constituting a polygonal surface. Angles formed by the inclined surfaces of each side surface and the perpendicular to the exit surface gradually become greater toward the exit surface. An end of each of the wedge-shaped parts on the side of the entrance surface is flat surface parallel to the entrance surface.

REFERENCES:
patent: 6049649 (2000-04-01), Arai
patent: 6995907 (2006-02-01), Osawa et al.
patent: A 07-230002 (1995-08-01), None
patent: A 08-335044 (1996-12-01), None
patent: A 10-319216 (1998-12-01), None
patent: A 2003-050307 (2003-02-01), None
patent: A 2003-057416 (2003-02-01), None
patent: A 2003-504691 (2003-02-01), None
patent: A 2003-066206 (2003-03-01), None
patent: WO 01/04701 (2001-01-01), None

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