US 11,835,748 B2
Planar light source and display device
Shinya Kondo, Itano-gun (JP); and Takuya Nakabayashi, Tokushima (JP)
Assigned to NICHIA CORPORATION, Anan (JP)
Filed by NICHIA CORPORATION, Anan (JP)
Filed on Jul. 18, 2022, as Appl. No. 17/866,678.
Claims priority of application No. 2021-118622 (JP), filed on Jul. 19, 2021.
Prior Publication US 2023/0025627 A1, Jan. 26, 2023
Int. Cl. G02F 1/1335 (2006.01); F21V 8/00 (2006.01); G02F 1/13357 (2006.01)
CPC G02B 6/002 (2013.01) [G02B 6/0088 (2013.01); G02F 1/133603 (2013.01); G02F 1/133608 (2013.01); G02F 1/133612 (2021.01)] 23 Claims
OG exemplary drawing
 
1. A planar light source comprising:
a support member comprising a wiring substrate that comprises a conductive portion;
a light guide member comprising a first surface facing the support member, a second surface located on a side opposite the first surface, and a hole open at a first surface side;
a light source disposed in the hole of the light guide member and electrically connected to the conductive portion; and
a first reinforcing member disposed on the support member and surrounding the light guide member in a plan view, the first reinforcing member comprising:
a first portion and a second portion extending in a first direction and facing each other, and
a third portion and a fourth portion extending in a second direction orthogonal to the first direction and facing each other; wherein:
at least one of the first portion, the second portion, the third portion, and the fourth portion has light reflectivity to light emitted from the light source;
in the plan view, the light guide member is located between the first portion and the second portion in the second direction, and is located between the third portion and the fourth portion in the first direction;
the wiring substrate comprises an external connection portion extending in a direction from the third portion toward the fourth portion in the first direction, and electrically connected to the conductive portion; and
the external connection portion is located closer to an outside than the fourth portion relative to a center of the wiring substrate.