Patent ID: 11934003
Assignee: NICHIA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F

Claim 12:
13. A planar light source comprising:
a support member;
a light guide member disposed on the support member and having a light source positioning part; and
a light source disposed on the support member while being in the light source positioning part of the light guide member; wherein
the support member comprises:
an insulation base having a first face positioned closer to the light source and a second face positioned opposite the first face,
a first conductive layer disposed on the first face of the insulation base and electrically connected to the light source,
an adhesive layer disposed on and in contact with the first face of the insulation base and the first conductive layer,
a light reflecting sheet disposed on the adhesive layer,
a second conductive layer disposed on the second face of the insulation base and electrically connected to the first conductive layer, the second conductive layer has a first face in contact with the second face of the insulation base and a second face opposite the first face, the second conductive layer being a metal layer that includes substantially no resin,
a first connection part comprises a resin and conductive particles, disposed on the second face, and connected to the second conductive layer,
a protective layer comprising a resin, and directly covering the second conductive layer and the first connection part,
a hole passing through the insulation base and the second conductive layer, and
a second connection part disposed in the hole and on the second face of the second conductive layer, and electrically connecting the first conductive layer and the second conductive layer, wherein:
a contact area between the second connection part and the second conductive layer is larger than a contact area between the second connection part and the first conductive layer.