Patent ID: 7731407

Claim:
A display device comprising: a light source; a light guide plate including a first plate surface that emits light incident from the light source, a second plate surface perpendicular to the first plate surface, and at least two protruding portions at a side of the second plate surface; a light source circuit board including the light source arranged thereon, the light source including a plurality of lighting elements, the light source circuit board being on the at least two protruding portions of the light guide plate, the light source disposed between the at least two protruding portions of the light guide plate and the light source configured to emit light towards the second plate surface of the light guide plate; and an optical sheet including a first sheet surface arranged to face the first plate surface, a second sheet surface arranged to face the light source circuit board, and at least two protruding portions which correspond in position to the protruding portions of the light guide plate, wherein at least one of the protruding portions of the light guide plate includes a concave portion, and at least part of the light source circuit board is disposed between the concave portion and the protruding portion of the optical sheet such that the light source circuit board is housed between the concave portion and at least one of the protruding portion of the optical sheet.