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US 8,134,656 B2Granted
Backlight device, display device, and television receiver
AssigneeSharp Kabushiki Kaisha
InventorKentaro Kamada
Life of this patent
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Abstract
A backlight device is provided with a cold cathode fluorescent tube as a first light source that emits light of green, and a cold cathode fluorescent tube as a second light source that can be switched on independently from the first light source and emits light of red and blue. A diffusion member provided on the light source side of a diffusion plate is disposed opposite to the first light source so as to diffuse green light.
Claims18
A backlight device comprising:
- a plurality of light sources;
- and
- a diffusion plate arranged to diffuse light from the plurality of light sources;
- wherein
- the plurality of light sources include:
- a first light source that emits light of a first color;
- and
- a second light source that is arranged so as to be switched independently from the first light source and to emit light of a second color complementary to the first color;
- the backlight device comprising a diffuser that is provided on at least one side of a light source side and a non-light source side of the diffusion plate so as to diffuse the light of the first color or the light of the second color;
- and
- the diffuser is only disposed directly opposite to either the first light source or the second light source.
8 more elements
Dependencies are inferred from the claim text.