Patent Number: 7,465,082

Title: Planar light-source device

Abstract: A planar light-source device is obtained in which, in the space between a point light source and the peripheral portion of a through-hole in a case, rays that leak into or are absorbed into a space outside a hollow region can be reduced, whereby the number of rays that propagate into the hollow region can be increased. A point light source is installed from outside a case, through through-holes formed in the case and a reflection sheet, and a reflector formed on the reflection sheet to correspond to the point light source is slanted with respect to the bottom side of the case, depthward along the through-hole, in a region enclosed by the peripheral portion of the through-hole of the case and by the point light source.

Inventors: Sakamoto; Takuya (Goshi, JP), Mori; Akihiro (Goshi, JP)

Assignee: Mitsubishi Denki Kabushiki Kaisha

International Classification: F21V 33/00 (20060101)

Expiration Date: 2021-12-16 0:00:00