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Title:
LIGHT-GUIDE PLATE, SURFACE LIGHT SOURCE DEVICE, DISPLAY DEVICE, AND ELECTRONIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2017/115472
Kind Code:
A1
Abstract:
Provided is a configuration such that, in a dual screen type surface light source device, leakage of light from a light source in a sub-screen to a main screen can be suppressed, and the occurrence of brightness unevenness in the main screen can be suppressed. The approximately flat-plate-shaped light-guide plate 10 comprises: a first light entry surface 26 where a light from a first light source 11 enters; a first light exit surface 21 intersecting approximately orthogonally to the first light entry surface 26, and outputting the light that has entered from the first light entry surface 26; a second light entry surface 27 where a light from a second light source 11A enters; and a second light exit surface 23 intersecting approximately orthogonally to the second light entry surface 27, and outputting the light that has entered from the second light entry surface 27. The first light entry surface 26 and the second light entry surface 27 are provided on side surfaces that are approximately orthogonal to one another. The first light exit surface 21 and the second light exit surface 23 are provided in different regions of a plane on one side. The second light exit surface 23 is provided with a plurality of second convex strips 25 formed so as to extend in a direction orthogonal to the second light entry surface 27.

Inventors:
KURATA GOUO (JP)
KUROKAWA TAKAFUMI (JP)
Application Number:
PCT/JP2016/057633
Publication Date:
July 06, 2017
Filing Date:
March 10, 2016
Export Citation:
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Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
International Classes:
F21V8/00; F21S2/00; F21Y115/10
Foreign References:
JP2013517590A2013-05-16
JP2013191501A2013-09-26
JP2013191514A2013-09-26
JP2012038571A2012-02-23
Attorney, Agent or Firm:
SERA Kazunobu et al. (JP)
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