Display device
AssigneeMagnolia White Corporation
InventorsMasanobu Ikeda, Yoshinori Aoki
Life of this patent
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Abstract
A display device includes a display area including a plurality of pixels, and a gradation control circuit configured to control a gradation of the pixel based on a gradation control mode. Each of the plurality of pixels includes first and second LED chips. One frame period of the gradation control mode includes a first to third subframe periods. In the first subframe period, the gradation of the pixel is controlled by a light emitting area of each of the first and second LED chips. In the second subframe period, the gradation of the pixel is controlled by a light emission time of each of the first and second LED chips. In the third subframe period, the gradation of the pixel is controlled by a current value supplied to each of the first and second LED chips.
Claims13
A display device comprising:
- a display area comprising a pixel;
- an illuminance detection portion configured to detect an illuminance value of an external light;
- and
- a gradation control circuit configured to select one of a first gradation control mode, a second gradation control mode, and a third gradation control mode based on the illuminance value,
- wherein the pixel comprises a first LED chip and a second LED chip,
- one frame period of the first gradation control mode comprises a first subframe period and a second subframe period,
- one frame period of the second gradation control mode comprises a third subframe period, a fourth subframe period, and a fifth subframe period,
- one frame period of the third gradation control mode comprises a sixth subframe period, a seventh subframe period, and an eighth subframe period,
- a gradation of the pixel is controlled by a light emitting area of each of the first LED chip and the second LED chip in the first subframe period, the third subframe period, and the sixth subframe period,
- the gradation of the pixel is controlled by a light emission time of each of the first LED chip and the second LED chip in the second subframe period, the fourth subframe period, and the seventh subframe period, and
- the gradation of the pixel is controlled by a current value supplied to each of the first LED chip and the second LED chip in the fifth subframe period and the eighth subframe period.
Dependencies are inferred from the claim text.