Display control device, display apparatus, non-transitory recording medium, and method for controlling display control device

A display control device, for controlling a display apparatus including a display panel, comprising:

• a host control unit configured to obtain or generate image data of an image to be displayed on the display panel;
• and
• a display control unit configured to output, to the display panel, the image data transferred from the host control unit, wherein:
• the host control unit is further configured to
• set a transition interval between a first period for which the image is displayed at a first frame rate and a second period for which the image is displayed at a second frame rate different from the first frame rate, the image being displayed at the second frame rate in the transition interval, and
• cause the display control unit to reduce a luminance difference of the image data in the transition interval, the luminance difference being caused when a frame rate is changed between the first frame rate and the second frame rate;
• and
• when a gamma value is an index of brightness of the image data, the host control unit is further configured to set a third gamma value in the transition interval at a value different from both a first gamma value in the first period and a second gamma value in the second period to cause the display control unit to reduce the luminance difference of the image data.

A method for controlling a display control device configured to control a display apparatus including a display panel, the display control device including a host control unit configured to obtain or generate image data of an image to be displayed on the display panel and a display control unit configured to output, to the display panel, the image data transferred from the host control unit, the method comprising:

• causing the host control unit to set a transition interval between a first period for which the image is displayed at a first frame rate and a second period for which the image is displayed at a second frame rate different from the first frame rate, the image being displayed at the second frame rate in the transition interval;
• and
• causing the display control unit to reduce a luminance difference of the image data in the transition interval, the luminance difference being caused when a frame rate is changed between the first frame rate and the second frame rate, wherein
• when a duty cycle is a ratio of a pixel light emission time of the display panel to a display time of the image, the host control unit is further configured to set a value of a third duty cycle in the transition interval at a value different from both a value of a first duty cycle in the first period and a value of a second duty cycle in the second period to cause the display control unit to reduce the luminance difference of the image data.

A method for controlling a display control device configured to control a display apparatus including a display panel, the display control device including a host control unit configured to obtain or generate image data of an image to be displayed on the display panel and a display control unit configured to output, to the display panel, the image data transferred from the host control unit, the method comprising:

• causing the host control unit to set a transition interval between a first period for which the image is displayed at a first frame rate and a second period for which the image is displayed at a second frame rate different from the first frame rate, the image being displayed at the second frame rate in the transition interval;
• and
• causing the display control unit to reduce a luminance difference of the image data in the transition interval, the luminance difference being caused when a frame rate is changed between the first frame rate and the second frame rate, wherein
• when a gamma value is an index of brightness of the image data, the host control unit is further configured to set a third gamma value in the transition interval at a value different from both a first gamma value in the first period and a second gamma value in the second period to cause the display control unit to reduce the luminance difference of the image data.