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Patent Searching and Data


Title:
PLANAR LIGHT SOURCE DEVICE AND DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/093511
Kind Code:
A1
Abstract:
This planar light source device has a casing, a light emission device, a light diffusion plate, and two second inclined reflective surfaces. The casing has a bottom surface, two first inclined reflective surfaces disposed so as to flank the bottom surface, and an opening part disposed so as to face the bottom surface and the two first inclined reflective surfaces. The light emission device is disposed on the bottom surface, and has a light-emitting element and a light beam control member for radiating, towards the two first inclined reflective surfaces, light irradiated from the light-emitting element. The light diffusion plate is disposed so as to block the opening part, and transmits light while causing the light to diffuse. The two second inclined reflective surfaces are respectively disposed between the light emission device and the two first inclined reflective surfaces, and reflect, towards the light diffusion plate, some of the light radiated from the light beam control member towards the first inclined reflective surfaces.

Inventors:
IZAWA TAKAHIRO
YAMADA KYOUHEI
Application Number:
JP2018/041830
Publication Date:
May 16, 2019
Filing Date:
November 12, 2018
Export Citation:
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Assignee:
ENPLAS CORP (JP)
International Classes:
F21S2/00; F21V5/00; F21V5/08; F21V7/00; F21V7/09; G02F1/13357; F21Y115/10
Domestic Patent References:
WO2011148694A12011-12-01
Foreign References:
JP2013012380A2013-01-17
JP2015191761A2015-11-02
JP2013232644A2013-11-14
JP2008027884A2008-02-07
JP2010021040A2010-01-28
JP2013143217A2013-07-22
Attorney, Agent or Firm:
WASHIDA, Kimihito (JP)
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