Color display device
AssigneeCitizen Watch Co., Ltd.
InventorTakashi Akiyama
Life of this patent
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Abstract
In a field sequential display device, a desired chromaticity of the white level can be easily achieved and fluctuations in the white level caused by fluctuation factors such as temperature characteristics can be suppressed. A light source comprises red, green, and blue LEDs and a white LED. The white LED includes a blue LED covered with a yellow fluorescent material. One field is divided into display subfields of red, green, blue and white. Only the red LED turns on in the red display subfield, only the green LED turns on in the green display subfield, only the blue LED turns on in the blue display subfield, and only the white LED turns on in the white display subfield. A shutter is controlled in each subfield based on sub-image data of each color.
Claims27
A display device, comprising:
- a light source that emits a plurality of individually controllable color lights having different spectral characteristics, the color lights including a white light;
- and
- a shutter that controls transmission or reflection of the lights emitted from the light source,
- wherein a field is divided into a plurality of subfields to emit a specific color light corresponding to each subfield from the light source, and to control the shutter corresponding to each subfield.
A display device, comprising:
- a light source that emits a plurality of individually controllable color lights having different spectral characteristics;
- and
- a shutter that controls transmission or reflection of the lights emitted from the light source,
- wherein a field is divided into a plurality of subfields to emit a specific color light corresponding to each subfield from the light source, and to control the shutter corresponding to each subfield, and one of the subfields is employed for white light display.
Dependencies are inferred from the claim text.