This display device includes a display control portion, a first power supply, a second power supply, and a connection control portion. The display control portion is capable of controlling display of a display panel and is configured to execute a predetermined control finish process before display control for the display panel is finished. The first power supply is configured to supply power supplied from an external power supply, to the display control portion. The second power supply is capable of storing power and is configured to supply power to a clock portion. The connection control portion is configured to connect the display control portion with the first power supply if disconnection of connection between the external power supply and the first power supply is not detected, and connect the display control portion with the second power supply if disconnection of the connection is detected.