Patent ID: 11966072
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  F | IPC F  G

Claim 0:
1. A planar light source device, comprising: a plurality of light sources that is arranged on a mounting surface of a light source substrate and that is independently drivable; a first light guide to emit light incident from a first light source included in the plurality of light sources from a first emitting surface in an emitting direction opposite to a direction from the first light source toward the light source substrate; a second light guide that is contained in a second light emitting region on the mounting surface, the second light emitting region being adjacent to a first light emitting region containing the first light guide, and that emits light incident from a second light source included in the plurality of light sources from a second emitting surface in the emitting direction; and a partition frame having a partition wall that is positioned between the first light guide and the second light guide, partitions the first light emitting region and the second light emitting region, and is provided with a gap apart from the first emitting surface, wherein an angle formed by a wall surface of the partition wall on a side of the first light guide and a bottom face of the partition wall is an acute angle; and wherein the partition wall includes a first partition wall facing the first light source with the first light guide interposed between the first partition wall and the first light source, and a second partition wall intersecting the first partition wall, and an angle formed by a wall surface of the first partition wall on the first light guide side and a bottom face of the first partition wall is smaller than an angle formed by a wall surface of the second partition wall on the first light guide side and a bottom face of the second partition wall.