Display device whose duty ratio in sub-frame period is controlled
A display device includes a pixel array, a driver configured to drive the pixel array, and a controller configured to control the driver. The controller controls the driver such that each unit frame period is formed by a plurality of sub-frame periods, and a duty ratio in each sub-frame period is controlled. The controller controls the driver such that in each unit frame, the duty ratio of a last sub-frame period is smaller than the duty ratio of a first sub-frame period.
1 . A display device comprising:
a pixel array;
a driver configured to drive the pixel array; and
a controller configured to control the driver,
wherein the controller controls the driver such that each unit frame period is formed by a plurality of sub-frame periods, and a duty ratio in each sub-frame period is controlled,
wherein the controller controls the driver such that each sub-frame period is formed by a first non-light-emitting period, a light-emitting period, and a second non-light-emitting period,
wherein the first non-light-emitting period starts at a start of each sub-frame period, the light-emitting period starts at an end of the first non-light-emitting period, and the second non-light-emitting period starts at the end of the light-emitting period, and
wherein when lengths of the first non-light-emitting period, the light-emitting period, and the second non-light-emitting period in a kth (k is 1 to n) sub-frame are defined as t Dk,1 , t Lk , and t Dk,2 , respectively, the controller controls the driver to satisfy
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2 . The device according to claim 1 , wherein the plurality of sub-frame periods have time lengths equal to each other.
3 . The device according to claim 1 , wherein the controller controls the driver such that the lengths t Dk,1 in k=1 to n−1 equal each other, the lengths t Lk in k=1 to n−1 equal each other, and the lengths t Dk,2 in k=1 to n−1 equal each other.
4 . The device according to claim 3 , wherein the controller controls the driver such that t D1,2 +t D2,1 is not less than 3 msec.
5 . The device according to claim 1 , wherein the driver supplies to the pixel array a signal having a voltage according to a luminance signal.
6 . The device according to claim 1 , wherein the driver supplies to the pixel array a signal once in each unit frame period.
7 . The device according to claim 6 , further comprising a measuring unit configured to measure a luminance on the periphery of the pixel array,
wherein the controller determines the duty ratio of each sub-frame period in accordance with an output of the measuring unit.
8 . The device according to claim 7 , wherein after the duty ratio is determined in accordance with the output of the measuring unit, the controller changes the duty ratios of remaining sub-frame periods to the determined duty ratio from the end of the first sub-frame period in the unit frame.
9 . A display apparatus comprising:
an information processing unit configured to process information; and
a display device according to claim 1 , which is configured to display information generated by the information processing unit.
10 . A photoelectric conversion apparatus comprising:
an optical unit including a plurality of lenses;
an image sensor configured to receive light having passed through the optical unit; and
a display unit configured to display an image,
wherein the display unit includes a display device according to claim 1 , which is configured to display an image captured by the image sensor.