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Title:
LIGHT-GUIDE PLATE, AREA LIGHT SOURCE DEVICE, DISPLAY DEVICE, MANUFACTURING METHOD FOR LIGHT GUIDE PLATE
Document Type and Number:
WIPO Patent Application WO/2019/202642
Kind Code:
A1
Abstract:
Provided are a light guide plate, an area light source device, a display device, and manufacturing method for the light guide plate such that the occurrence of uneven luminance is suppressed. The light guide plate (12) is characterized in that the light guide plate has a light entrance surface (12a) through which light enters, a light exit surface (12c) intersecting with the light entrance surface (12a) and through which light is output, and an opposite surface (12b) facing the light entrance surface (12a), wherein the light entering through the light entrance surface (12a) is guided to the opposite surface (12b) side and output from the light exit surface (12c), and the refractive index Nx in a direction perpendicular to the light entrance surface (12a) is higher than the refractive index Ny in a direction parallel to the light exit surface (12c) and parallel to the light entrance surface (12a).

Inventors:
KOMIZO Kohei (1-1-1, Ichigaya Kagacho, Shinjuku-k, Tokyo 01, 〒1628001, JP)
SADAHIRO Tetsuya (1-1-1, Ichigaya Kagacho, Shinjuku-k, Tokyo 01, 〒1628001, JP)
HASHIGUCHI Hironori (1-1-1, Ichigaya Kagacho, Shinjuku-k, Tokyo 01, 〒1628001, JP)
OHKAWA Koujiro (1-1-1, Ichigaya Kagacho, Shinjuku-k, Tokyo 01, 〒1628001, JP)
Application Number:
JP2018/015748
Publication Date:
October 24, 2019
Filing Date:
April 16, 2018
Export Citation:
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Assignee:
DAI NIPPON PRINTING CO., LTD. (1-1-1, Ichigaya Kagacho Shinjuku-k, Tokyo 01, 〒1628001, JP)
International Classes:
F21S2/00; F21V8/00; G02B5/30; G02F1/1335; G02F1/13357; F21Y115/10
Foreign References:
JP2006261088A2006-09-28
JP2013050470A2013-03-14
JP2017228359A2017-12-28
JP2008020747A2008-01-31
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (Sapia Tower, 1-7-12 Marunouchi, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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