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Patent Searching and Data


Title:
LIGHT GUIDE PLATE, AREA LIGHT SOURCE DEVICE, DISPLAY DEVICE, AND ELECTRONIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/026495
Kind Code:
A1
Abstract:
The purpose of the present invention is to suppress the spread of brightness of light emitted from a light exit surface of a light guide plate. Provided is an approximately flat plate-shaped light guide plate which has a light entry surface to the side thereof for the entry of light, and which outputs, via the light exit surface, the light entered via the light entry surface. The light guide plate is provided with a flat plate portion and a plurality of ridge lines and/or a plurality of recessed lines which are provided on a planar surface of the flat plate portion and which, as viewed from a direction normal to the planar surface, extend in a direction perpendicular to the light entry surface. The plurality of ridge lines and recessed lines include inclined surfaces inclined with respect to the planar surface. The light exit surface is formed of the inclined surfaces of the plurality of ridge lines and/or the plurality of recessed lines. An angle formed by the planar surface and a tangent to the inclined surfaces at the end of the ridge lines and/or the recessed lines is not less than 30 degrees and not more than 70 degrees.

Inventors:
WATANABE SHOTARO (JP)
YABE MAMORU (JP)
Application Number:
PCT/JP2018/024675
Publication Date:
February 07, 2019
Filing Date:
June 28, 2018
Export Citation:
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Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
International Classes:
F21S2/00; F21V5/04; G02F1/13357; F21Y115/10
Foreign References:
JP2011175965A2011-09-08
JP2012104390A2012-05-31
JP2016154119A2016-08-25
JP2014130748A2014-07-10
Attorney, Agent or Firm:
SEKINE, Takehiko et al. (JP)
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