Patent ID: 8794779

Claim:
A lighting device, comprising: at least one light source; a light guide member including a light entrance surface facing the light source and a light exit surface along an arrangement direction in which the light source and the light entrance surface are arranged; and a follow-up mechanism configured to move the light source in the arrangement direction in response to a deformation of the light guide member; wherein: the follow-up mechanism includes a support member supporting the light source and being in contact with a surface of the light guide member along the light entrance surface; the lighting device further comprises: a chassis housing the light source and the light guide member; and a guide mechanism including a portion provided in the chassis and a portion provided in the support member, and configured to guide a movement of the support member relative to the chassis; the guide mechanism includes a first mating portion provided in the support member and a second mating portion provided in the chassis so as to mate with the first mating portion and to have a clearance relative to the first mating portion in the arrangement direction; the chassis includes a bottom plate arranged on a side opposite from the light exit surface with respect to the light guide member and a side plate rising from an outer edge of the bottom plate; and the second mating portion is provided in the side plate.