Patent ID: 7484873

Claim:
A display device, comprising: a non-self light emitting type display element; and an illumination device for illuminating the display element, the illumination device comprising a light source; a light guide plate having a light emitting surface; a light incident body having a first end portion that has a light incident surface on which light from the light source is incident, and an outer surface portion a part of which has an elliptical shape, the light guide plate and the light incident body being made of the same material; and a coupling portion disposed between the light incident body and the light guide plate; wherein opposed surface portions of the light guide plate and opposed elliptical surface portions of the light incident body are respectively coupled by opposed planar surface portions that define a wedge shape having a tapered thickness that decreases from the light incident body towards the light guide plate, the planar surface portions being tangential to respective elliptical surface portions of the light incident body.