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Title:
LIGHT GUIDE PLATE, SURFACE LIGHT SOURCE DEVICE AND DISPLAY APPARATUS
Document Type and Number:
Japanese Patent JP2014103129
Kind Code:
A
Abstract:

To provide a light guide plate capable of making luminance ununiformity in the neighborhood of an incident surface facing a light source inconspicuous.

A light guide plate 30 includes a main body part 40 and a plurality of unit shape elements 50 which are arranged on one lateral surface 41 of the main body part side by side in the arrangement direction intersecting the light guide direction and form a light emission surface 31 of the light guide plate. Each unit shape element is extended in a direction intersecting the arrangement direction. An light emission surface angle θa as an angle formed by an outer contour 51 of the unit shape element with respect to one lateral surface falls into the range of 10° to 30° in the region on the outer contour corresponding to the range of 35% to 70% of the whole width of the unit shape element.


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Inventors:
GOTO MASAHIRO
SEKIGUCHI HIROSHI
YAMAMOTO HIROSHI
Application Number:
JP2014047884A
Publication Date:
June 05, 2014
Filing Date:
March 11, 2014
Export Citation:
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Assignee:
DAINIPPON PRINTING CO LTD
International Classes:
F21S2/00
Domestic Patent References:
JP2005317435A2005-11-10
JP2008235264A2008-10-02
JP2009283383A2009-12-03
Foreign References:
WO2007049618A12007-05-03
Attorney, Agent or Firm:
Hirohito Katsunuma
Hiroyuki Nagai
Yukihiro Hotta



 
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