US 12,189,175 B2
Planar light source
Yukihiro Miura, Tokushima (JP); and Ryohei Yamashita, Tokushima (JP)
Assigned to NICHIA CORPORATION, Anan (JP)
Filed by NICHIA CORPORATION, Anan (JP)
Filed on Aug. 25, 2023, as Appl. No. 18/456,271.
Claims priority of application No. 2022-136538 (JP), filed on Aug. 30, 2022.
Prior Publication US 2024/0069270 A1, Feb. 29, 2024
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/0091 (2013.01) [G02B 6/0013 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A planar light source comprising:
a first substrate comprising a first part extending to a first outer edge of the first substrate in a top view, and a second part extending from the first part to a second outer edge of the first substrate opposite the first outer edge in the top view;
a light source located at an upper surface side of the first part;
a light guide member located at the upper surface side of the first part and extending to the first outer edge of the first substrate in the top view; and
a circuit member overlapping the light guide member in a direction parallel to an upper surface of the first part, the circuit member comprising:
a second substrate located at an upper surface side or a lower surface side of the second part, and
an electronic element located on the second substrate, the electronic element overlapping the second part of the first substrate in the top view.