US 12,153,306 B2
Planar light source and liquid crystal display device
Koki Shibai, Itano-gun (JP); Naoya Kashiwagi, Itano-gun (JP); and Shimpei Sasaoka, Itano-gun (JP)
Assigned to NICHIA CORPORATION, Anan (JP)
Filed by NICHIA CORPORATION, Anan (JP)
Filed on Mar. 29, 2023, as Appl. No. 18/192,583.
Claims priority of application No. 2022-058257 (JP), filed on Mar. 31, 2022.
Prior Publication US 2023/0314873 A1, Oct. 5, 2023
Int. Cl. G02F 1/13357 (2006.01)
CPC G02F 1/133603 (2013.01) [G02F 1/133605 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A planar light source comprising:
a plurality of light sources;
a substrate; and
a partitioning member, the partitioning member including
a first member having first partitioned parts arranged on the substrate in a first matrix each having a first bottom part and first oblique parts surrounding the first bottom part, and
a second member having second partitioned parts arranged on the substrate in a second matrix each having a second bottom part and second oblique parts surrounding the second bottom part,
the first member further having first outer oblique parts connected to upper edges of the first oblique parts located along an outer edge on a second member side and overlapping the second oblique parts located along an outer edge on a first member side,
the first bottom parts and the second bottom parts each having a light source disposition opening, and
the light sources being individually disposed on the substrate and exposed in the light source disposition openings,
wherein the second oblique parts are located under the first outer oblique parts, and
wherein a height of an upper edge of at least one of the second oblique parts located along the outer edge on the first member side is lower than a height of an upper edge of at least one of the first outer oblique parts,
wherein at least one of the first outer oblique parts has a first surface, a second surface opposite to the first surface, and a third surface directly next to the first surface and the second surface, and
wherein the first surface and the third surface are in surface-to-surface contact with the second member.
 
22. A planar light source comprising:
a plurality of light sources;
a substrate; and
a partitioning member, the partitioning member including
a first member having first partitioned parts arranged on the substrate in a first matrix each having a first bottom part and first oblique parts surrounding the first bottom part, and
a second member having second partitioned parts arranged on the substrate in a second matrix each having a second bottom part and second oblique parts surrounding the second bottom part,
the first member further having first outer oblique parts connected to upper edges of the first oblique parts located along an outer edge on a second member side and overlapping the second oblique parts located along an outer edge on a first member side,
the first bottom parts and the second bottom parts each having a light source disposition opening, and
the light sources being individually disposed on the substrate and exposed in the light source disposition openings,
wherein the second oblique parts are located under the first outer oblique parts, and
wherein a height of an upper edge of at least one of the second oblique parts located along the outer edge on the first member side is lower than a height of an upper edge of at least one of the first outer oblique parts, wherein the first outer oblique parts are bonded to the second member with an adhesive member.