Title:
LIGHT IRRADIATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/149356
Kind Code:
A1
Abstract:
Provided is a light irradiation device 100 comprising: a light guiding plate 1 that reflects light introduced to the interior thereof from a side peripheral surface 1 by a front surface 1b and emits the light from a back surface 1c; a light source that irradiates the interior of the light guiding plate 1 with the light from the side peripheral surface 1a thereof; and a frame 3 that supports the light guiding plate 1 and the light source, the frame 3 comprising a ring-shaped frame main body 31 disposed around the light guiding plate 1, and a first flange part 32 extending inward from the back surface 1c side of the frame main body 31, and a peripheral edge part of the light guiding plate 1 being disposed on the first flange part 32, wherein not only wobbling and positional displacement of the light guiding plate 1 but also unexpected reflected light by the back surface 1c of the light guiding plate 1 is suppressed. A translucent sheet 5 on which fine recesses and protrusions 5a are formed on the front surface 1b is affixed to the back surface 1c of the light guiding plate 1 so as to extend from the light guiding plate 1 to the first flange part 32.
Inventors:
MOTOIE YOSHIKI (JP)
Application Number:
PCT/JP2021/042444
Publication Date:
July 14, 2022
Filing Date:
November 18, 2021
Export Citation:
Assignee:
CCS INC (JP)
International Classes:
F21S2/00; G01N21/84; F21Y115/10
Domestic Patent References:
| WO2007023894A1 | 2007-03-01 |
Foreign References:
| KR20080081709A | 2008-09-10 | |||
| JP2017227534A | 2017-12-28 | |||
| JP2005156695A | 2005-06-16 | |||
| JP2015129706A | 2015-07-16 | |||
| KR200444788Y1 | 2009-06-05 | |||
| US20030142245A1 | 2003-07-31 |
Attorney, Agent or Firm:
NISHIMURA, Ryuhei (JP)
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