Patent ID: 8678634

Claim:
An illuminating device comprising: a light emitting diode; a mounting board on which a plurality of the light emitting diodes are arranged in a line; a light guide plate that includes a light incident surface arranged to receive light of the plurality of the light emitting diodes and a light emitting surface arranged to emit the light that has entered from the light incident surface, and emits light from the light emitting surface while directing the light that has entered from the light incident surface in a predetermined propagation direction; and a frame that includes a side face to which the mounting board is attached, and a bottom face on which the light guide plate is disposed, wherein the frame includes a groove in which an end portion of the mounting board is placed, and the groove is formed between the side face and the bottom face on an opposite side of the bottom face from the light guide plate, a support that supports the light guide plate is located in the groove, a reflecting sheet is disposed between the light guide plate and the bottom face of the frame and reflects the light that has entered from the light incident surface toward the light emitting surface, and the support is a bending portion formed by bending an end portion of the reflecting sheet in a predetermined shape so as to elastically support the light guide plate.