Diffusing board and surface light source device

Details Diffusing board and surface light source device Diffusing board and surface light source device

2005-06-10

2009-11-10

Ward, John A (Department: 2885)

Illumination

Edge lighted panel

Light guide

C359S599000

Reexamination Certificate

active

07614776

ABSTRACT:
A diffusing board which can suppress moiré fringes, color flickering and screen brightness deterioration on a screen of a liquid crystal display device. On the surface of a transparent board (83), a pattern wherein substantially rectangular shapes are arranged in lattice by using a synthesized pattern (86) is formed. The synthesized pattern (86) is provided by synthesizing a plurality of first uneven patterns (84) having a linear shape which is long in one direction, and a plurality of concave lens shaped second uneven patterns (85) arranged at random.

REFERENCES:
patent: 2002/0080308 (2002-06-01), Umemoto et al.
patent: 2003/0137824 (2003-07-01), Shinohara
patent: 1174735 (2002-01-01), None
patent: 1279892 (2003-01-01), None
patent: 8-129205 (1996-05-01), None
patent: 8-160203 (1996-06-01), None
patent: 2003-215584 (2003-07-01), None
patent: 2003-240924 (2003-08-01), None
Supplementary European Search Report dated Apr. 3, 2009, for related application No. 05749059.1, 6 pages.
English Patent Abstracts of Japan for patent application with publication No. JP08160203, Publication Date: Jun. 21, 1996, 1 page.
International Search Report for PCT/JP2005/010700 mailed Sep. 27, 2005 (2 pages).
Examination Report for Application No. 05 749 059.1-2216, mailed on Sep. 1, 2009 (6 pages).

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