A method of controlling a display device, the method comprising:
- a screen display step of displaying, by a display screen of a display section, a selection screen to select an interface of a plurality of interfaces when no input of an image signal is detected to a coupling section of each interface of the plurality of interfaces coupled to a corresponding external device and when an operation is received by a reception section;
- a setting step of receiving a user input and setting one of a first condition, a second condition, and a third condition based on the user input, the first condition setting an automatic input detection function to be always valid, the second condition setting the automatic input detection function to be always invalid, and the third condition is a setting of automatically changing an image to be displayed on the display screen in accordance with whether the automatic input detection function is in the valid state or in the invalid state;
- a detection step of detecting input of the image signal to the coupling section;
- and
- a selection step of:
- when the first condition is set, selecting and displaying the image of the image signal by the display section in response to detecting the input of the image signal to the coupling section, regardless of receiving the operation by the reception section to instruct display of the selection screen,
- when the second condition is set, selecting and displaying an image of the selection screen by the display section, regardless of detecting the input of the image signal to the coupling section, and
- when the third condition is set, (i) selecting the image of the selection screen to be displayed by the display section when no input of the image signal is detected, which sets the automatic input detection function as in the valid state, (ii) when the automatic input detection function is set to the valid state, automatically changing the display section from displaying the selection screen to displaying the image of the image signal by the display section in response to detecting the input of the image signal to the coupling section, and (iii) in response to receiving the operation by the reception section to instruct display of the selection screen, which sets the automatic input detection function as in the invalid state, selecting and continuing to display the selection screen in the screen display step even when the input of the image signal to the coupling section is detected.