US 11,913,637 B2
Planar illumination device
Ippei Kusunoki, Kitasaku-gun (JP); Toru Kunimochi, Kitasaku-gun (JP); and Takahito Yoshida, Kitasaku-gun (JP)
Assigned to MINEBEA MITSUMI Inc., Nagano (JP)
Appl. No. 18/040,671
Filed by MINEBEA MITSUMI Inc., Nagano (JP)
PCT Filed Jun. 25, 2021, PCT No. PCT/JP2021/024247
§ 371(c)(1), (2) Date Feb. 6, 2023,
PCT Pub. No. WO2022/030137, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 2020-134427 (JP), filed on Aug. 7, 2020.
Prior Publication US 2023/0296225 A1, Sep. 21, 2023
Int. Cl. F21V 7/00 (2006.01); F21V 7/10 (2006.01); F21Y 105/10 (2016.01)
CPC F21V 7/0066 (2013.01) [F21V 7/10 (2013.01); F21Y 2105/10 (2016.08)] 12 Claims
OG exemplary drawing
 
1. A planar illumination device comprising:
a substrate provided with a plurality of light sources at one surface side;
a reflector provided at the one surface side of the substrate;
a bottom frame provided at a surface side of the substrate opposite to the one surface side;
a first fixing member configured to fix a center portion of the reflector in a longitudinal direction to the bottom frame; and
a second fixing member configured to fix the one surface of the substrate and the reflector, wherein
a force of the second fixing member restricting the substrate and the reflector is greater at a center portion of the reflector in the longitudinal direction than at a portion of the reflector separated in the longitudinal direction from the center portion.