Title:
SURFACE LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/061489
Kind Code:
A1
Abstract:
A surface lighting device (10) according to one embodiment of the present invention is provided with: a light bar (14, 140, 141, 142, 143, 144) which has a light exit surface (14c, 140d, 141c, 142c, 143c, 144a) for emitting incident light, while being provided with a plurality of first prisms (14x) on the light exit surface (14c, 140d, 141c, 142c, 143c, 144a) in a first direction; light sources (13a, 13b) which emit light that is to be incident on the light bar (14, 140, 141, 142, 143, 144); a light guide plate (16) which guides the light incident on a light entrance surface (16c) to a light exit surface (16a); and a prism sheet (15) which is arranged between the light exit surface (14c, 140d, 141c, 142c, 143c, 144a) of the light bar (14, 140, 141, 142, 143, 144) and the light entrance surface (16c) of the light guide plate (16), and which is provided with a plurality of second prisms (15i) on a surface that faces the light exit surface (14c, 140d, 141c, 142c, 143c, 144a) of the light bar (14, 140, 141, 142, 143, 144), said second prisms being in line in a second direction that intersects with the first direction.
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Inventors:
YAMADA TAKU (JP)
Application Number:
PCT/JP2017/028786
Publication Date:
April 05, 2018
Filing Date:
August 08, 2017
Export Citation:
Assignee:
MINEBEA MITSUMI INC (JP)
International Classes:
F21S2/00; G02B6/00; F21Y115/10
Foreign References:
| JP2016154119A | 2016-08-25 | |||
| JP2013004267A | 2013-01-07 | |||
| JP2003331626A | 2003-11-21 |
Attorney, Agent or Firm:
TORANOMON INTELLECTUAL PROPERTY FIRM (JP)
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