Display device with display panel and controller for display panel

A display device, comprising:

• a display panel including a plurality of pixels;
• and
• a controller configured to control driving of the display panel in accordance with a refresh rate,
• wherein the display panel is configured to be driven in sets including at least one refresh period and at least one hold period,
• wherein at least one set of the sets, after a gradation change of an image, comprises a plurality of subsets including a first subset and a second subset,
• wherein the display device is configured to be driven at a first subset refresh rate in the first subset,
• wherein the display device is configured to be driven at a second subset refresh rate in the second subset, and
• wherein the second subset refresh rate is different from the first subset refresh rate.

A display device, comprising:

• a display panel comprising a display area where a plurality of pixels is disposed;
• and
• a controller configured to drive the display panel in accordance with a refresh rate,
• wherein the plurality of pixels comprises a light emitting element and a pixel circuit configured to drive the light emitting element,
• wherein the pixel circuit is configured to be driven in sets including at least one refresh period and at least one hold period,
• wherein the controller is configured to change a bias voltage during the at least one hold period in at least one set when a gradation of an image changes,
• wherein the at least one set comprises a plurality of subsets,
• wherein the display panel is configured to be driven at different refresh rates in the plurality of subsets, and
• wherein the different refresh rates are to decrease sequentially in the plurality of subsets.

A display device, comprising:

• a display panel comprising a display area where a plurality of pixels is disposed;
• and
• a controller configured to drive the display panel in accordance with a refresh rate,
• wherein the plurality of pixels comprises a light emitting element and a pixel circuit configured to drive the light emitting element,
• wherein the pixel circuit is configured to be driven in sets including at least one refresh period and at least one hold period,
• wherein the controller is configured to change a bias voltage during the at least one hold period in at least one set when a gradation of an image changes,
• wherein the pixel circuit comprises a driving transistor,
• wherein a first electrode of the driving transistor is configured to receive a data voltage and the bias voltage, and a second electrode of the driving transistor is connected to the light emitting element, and
• wherein the bias voltage to be applied to the first electrode during a bias section period is higher than the data voltage.