Patent ID: 7905649

Claim:
A display device comprising: a visual target; and a backlight adapted to illuminate the visual target from the rear, the backlight including: a plurality of first light sources disposed on the rear of the visual target and on one side of a given direction along the rear surface of the visual target to produce light of a first wavelength; second light sources disposed on the rear of the visual target and on the one side of the given direction to produce light of a second wavelength different from the first wavelength and smaller in number than the first light sources; and a light guide plate disposed to be opposed to the rear surface of the visual target so as to radiate the light, produced by the first and second light sources, across the rear surface of the visual target while at the same time guiding the light toward another side of the given direction, wherein the light guide plate has a plurality of projecting portions on a side surface portion thereof upon which the light, produced by the plurality of first and second light sources is incident, the projecting portions being arranged, along the side surface portion and project toward the one side of the given direction, the plurality of first light sources are disposed to be opposed to the tip surfaces of the plurality of projecting portions, and the second light sources are disposed to be opposed to the bottom surfaces of recessed portions formed between the plurality of projecting portions.