PLANAR ILLUMINATION DEVICE

WIPO Patent Application WO/2021/111749

A1

A planar illumination device (1) according to one embodiment comprises: a light guide plate (6); a plurality of light sources (11); one or more optical sheets (7-9); and a bottom frame (2) and a top frame (3). The light guide plate (6) receives light from a light-incident-side surface. The plurality of light sources (11) irradiate the light-incident-side surface of the light guide plate (6) with light. The one or more optical sheets (7-9) are laminated on an emission-side surface of the light guide plate (6). The bottom frame (2) and the top frame (3) accommodate the light guide plate (6), the light sources (11), and the optical sheets (7-9). One side surface on the non-light-incident side of the light guide plate (6) and the optical sheets (7-9) is provided with a gap between the side surface and the inner surface of a side wall (2b) of the bottom frame (2). The ends of the light guide plate (6) and the optical sheets (7-9) are held between an eaves part (3b) forming an opening (3a) in the top frame (3) and a floor part (2a) of the bottom frame (2). A reflective layer (6a) is formed on the one side surface of the non-light-incident-side of the light guide plate (6) provided with the gap.

JPH11213716	LUMINAIRE, TUNNEL LUMINAIRE, AND TUNNEL ILLUMINATION SYSTEM
JP5518559	Lamp unit
JP2002190203	OPTICAL FIBER LIGHT GUIDE AND ILLUMINATION APPARATUS USING THE SAME

ADACHI KAZUMASA (JP)
YOSHIGAKI NOBUHIKO (JP)

PCT/JP2020/039411

June 10, 2021

October 20, 2020

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MINEBEA MITSUMI INC (JP)

F21S2/00; F21Y115/10

WO2012086511A1

2012-06-28

JP2018120793A	2018-08-02
JP2019129066A	2019-08-01
JP2017204484A	2017-11-16

TORANOMON INTELLECTUAL PROPERTY FIRM (JP)

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