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1. (WO2018061489) SURFACE LIGHTING DEVICE

Pub. No.:    WO/2018/061489    International Application No.:    PCT/JP2017/028786
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Wed Aug 09 01:59:59 CEST 2017
IPC: F21S 2/00
F21S 8/10
G02B 6/00
F21W 101/14
F21Y 115/10
Applicants: MINEBEA MITSUMI INC.
ミネベアミツミ株式会社
Inventors: YAMADA, Taku
山田 敦
Title: SURFACE LIGHTING DEVICE
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.