Title:
ILLUMINATION DEVICE AND DIFFUSION BODY
Document Type and Number:
WIPO Patent Application WO/2021/117119
Kind Code:
A1
Abstract:
An illumination device (100) is provided with: a light source (4); a scattering layer (3) that has a plate shape having an upper surface, a lower surface, and side surfaces, allows incident light (5) radiated by the light source (4) to be incident from a side surface, and emits, from the lower surface, scattering light (7) generated by Rayleigh-scattering the incident light (5); a reflection layer (1) disposed at a position facing the upper surface of the scattering layer (3) and reflecting the scattering light (7); and a low refractive index layer (2) disposed between the scattering layer (3) and the reflection layer (1) and having a second refractive index lower than a first refractive index possessed by the scattering layer (3). The arithmetic mean roughness of a surface of the reflection layer (1) is greater than or equal to 0.03 μm, said surface facing the upper surface of the scattering layer (3).
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Inventors:
NITTA YASUYUKI (JP)
OKAGAKI SATORU (JP)
FUJII YUSUKE (JP)
YAMAZAKI HARUKA (JP)
TERAI MAMORU (JP)
OKAGAKI SATORU (JP)
FUJII YUSUKE (JP)
YAMAZAKI HARUKA (JP)
TERAI MAMORU (JP)
Application Number:
PCT/JP2019/048197
Publication Date:
June 17, 2021
Filing Date:
December 10, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F21S2/00; G02F1/13357
Domestic Patent References:
WO2013018560A1 | 2013-02-07 |
Foreign References:
JP2011099899A | 2011-05-19 | |||
JP2014237267A | 2014-12-18 | |||
JPH0627327A | 1994-02-04 | |||
JP2018060624A | 2018-04-12 | |||
JP2015207554A | 2015-11-19 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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