Display device and control method

1. A display device, comprising:

a display configured to display an image; and

a driver configured to execute driving for displaying the image on the display in a display period to display the image, and execute driving different from the driving for displaying the image on the display, in a non-display period subsequent to the display period,

the driver comprising:

a power supply module configured to supply a power supply voltage to an internal circuit included in the driver,

the power supply module comprising:

a load module configured to form a load to the power supply voltage supplied to the internal circuit; and

a first switch configured to make connection between an output line and the load module, the output line connecting the power supply module and the internal circuit,

the driver executing control of making connection between the output line and the load module in the non-display period.

2. The display device of claim 1 , wherein

the load module comprises a plurality of load resistances, and a plurality of second switches connected to the plurality of load resistances, respectively, and

the driver executes control of switching the second switches connected to the plurality of load resistances, respectively, to adjust magnitude of load supplied to the power supply voltage in the non-display period.

3. The display device of claim 2 , wherein

the driver executes control of detecting a ripple occurring in the power supply voltage in an initial non-display period, and switching each of the second switches connected to the plurality of load resistances, respectively, so as to supply a preferable load to the power supply voltage to suppress the detected ripple after the initial non-display period.

4. The display device of claim 2 , wherein

the driver, if magnitude of a ripple occurring in the power supply voltage in a plurality of first non-display periods included in a first period is different from magnitude of the ripple occurring in the power supply voltage in a plurality of second non-display periods included in a second period, executes first control of detecting a first ripple occurring in the power supply voltage in an initial first non-display period, and switching each of the second switches connected to the plurality of load resistances, respectively, so as to supply a preferable load to suppress the detected first ripple after the initial first non-display period, and

the driver, if the first period is ended and the second period is started, executes second control of detecting a second ripple occurring in the power supply voltage in an initial second non-display period, and switching each of the second switches connected to the plurality of load resistances, respectively, so as to supply a preferable load to suppress the detected second ripple after the initial second non-display period.

5. The display device of claim 4 , wherein

the driver, every time one of the plurality of first non-display periods included in the first period is started, counts number of times of start of the first non-display period, and

the driver, if the counted number of times reaches a preset number of times, recognizes that the first period has been ended and executes the second control.

6. The display device of claim 4 , wherein

the driver, if one frame period including the first period and the second period is ended, executes the first control and the second control for a new first period and a new second period included in a next frame period.

7. The display device of claim 4 , wherein

each of the non-display periods is a sensing operation period of a touch sensor provided at the display, and

the plurality of first non-display periods and the plurality of second non-display periods are different with respect to width of an area which can be sensed by the touch sensor.

8. The display device of claim 1 , wherein

the non-display period is a sensing operation period of a touch sensor provided at the display.

9. A control method applied to a display device comprising a display which displays an image, and a driver, the driver including a power supply module configured to supply a power supply voltage to an internal circuit included in the driver, the power supply module comprising a load module configured to form a load to the power supply voltage supplied to the internal circuit, and a first switch configured to make connection between an output line and the load module, the output line connecting the power supply module and the internal circuit,

the method comprising:

executing driving for displaying the image on the display in a display period to display the image, and executing driving different from the driving for displaying the image on the display, in a non-display period subsequent to the display period; and

executing control of making connection between the output line and the load module in the non-display period.

10. The control method of claim 9 , wherein

the load module comprises a plurality of load resistances, and a plurality of second switches connected to the plurality of load resistances, respectively, and

the method further comprises executing control of switching each of the second switches connected to the plurality of load resistances, respectively, to adjust magnitude of load supplied to the power supply voltage in the non-display period.