Patent ID: 8579454

Claim:
A lighting device comprising: a light guide plate having a light entrance surface, a light exit surface, an opposite surface, and a cutout, the light entrance surface being a side surface of the light guide plate, the light exit surface being one of plate surfaces of the light guide plate, the opposite surface being an opposite surface from the light exit surface; a light source arranged opposite the light entrance surface of the light guide plate; a reflection sheet arranged adjacent to the opposite surface of the light guide plate; a housing having a bottom plate and a side plate rising from an outer edge of the bottom plate on one of surfaces of the bottom plate, the housing holding at least the reflection sheet and the light guide plate arranged on the one of surfaces of the bottom plate; and a positioning member provided on the housing and fitted in the cutout such that the light guide plate is positioned with respect to a planar direction thereof, wherein the positioning member is fitted in the cutout, and the reflection sheet has a bent portion in a location where the cutout is located, and covers at least a part of the positioning member exposed on an opposite side to the side plate.