Patent ID: 8681293

Claim:
A liquid crystal display device, comprising: a light guide plate having a substantially rectangular planar shape; a light source for emitting illumination light so that the illumination light enters the light guide plate from a lateral surface of the light guide plate; a liquid crystal panel, which is arranged on a front side of the light guide plate and is irradiated with the illumination light guided by the light guide plate; and a support member, which is arranged on a rear side of the light guide plate, for supporting the light guide plate, wherein the support member comprises a protrusion directed toward the light guide plate and provided at a position of an adjacent side which is adjacent to, of sides of the substantially rectangular planar shape of the light guide plate, a side at which the light source is arranged, and wherein the light guide plate comprises: an engaging concave portion, which is a concave portion formed at another lateral surface of the light guide plate on the adjacent side and recessed to an inner side with respect to the adjacent side, for preventing a shift of the light guide plate when the protrusion is inserted therethrough; and a foreset concave portion having a shallower recess than a recess of the engaging concave portion, and positioned in front of the engaging concave portion when viewed from the light source.