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Title:
PLANAR LIGHT SOURCE DEVICE, DISPLAY DEVICE AND LIGHT FLUX CONTROL MEMBER
Document Type and Number:
WIPO Patent Application WO/2017/168930
Kind Code:
A1
Abstract:
This planar light source device comprises a base board, a light-emitting device and a diffusing plate. The light-emitting device includes a light-emitting element and a light flux control member. The light flux control member has an entry surface, an exit surface, and a gate mark disposed in a portion of the outer peripheral portion of the light flux control member. The entry surface and the exit surface are formed in such a manner that the illuminance distribution on the diffusing plate has an anisotropy wherein the light reaches farther in the directions of 1 or more predetermined horizontal angles φ than in other directions, when assuming that the light is emitted from the light-emitting device in a state wherein the light flux control member does not have the gate mark. The horizontal angle φ range of the gate mark includes any one among the 1 or more predetermined horizontal angles φ.

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Inventors:
HIRAKA KENSUKE
Application Number:
JP2017/000527
Publication Date:
October 05, 2017
Filing Date:
January 11, 2017
Export Citation:
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Assignee:
ENPLAS CORP (?3320034, JP)
International Classes:
F21S2/00; F21V5/00; F21V5/04; G02F1/13357; F21Y115/10
Foreign References:
JP2013097960A2013-05-20
JP2011065851A2011-03-31
JP2007227410A2007-09-06
JP2014056702A2014-03-27
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (?1600023, JP)
Koichi Washida (?1600023, JP)
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