Patent ID: 8894264

Claim:
A spread illuminating apparatus comprising: a light guide plate where one surface among a pair of opposing principal surfaces is an emitting surface, a plurality of optical sheets laminated on the emitting surface, a light-blocking member that defines an effective area of the emitting surface, a light source disposed facing an incident light surface of the light guide plate, and a frame for accommodating the light guide plate, the plurality of optical sheets, the light-blocking member, and the light source, wherein the plurality of optical sheets are formed such that a position of an edge of each optical sheet on the incident light surface side of the light guide plate is spaced farther apart from the incident light surface of the light guide plate as moving toward a top layer of the optical sheets counted from the emitting surface, and the light-blocking member is fixed to each optical sheet and extends from the incident light surface side of the light guide plate so as to cover a vicinity of the edges of the plurality of optical sheets.