1. A display apparatus, comprising: a display unit including a liquid crystal panel having a red pixel, a green pixel, a blue pixel, and a white pixel, and a backlight; a control unit configured to control displaying an image on the display unit; and an input terminal configured to receive electric power supply from an outside power source, wherein the control unit controls the transmissivity of the red pixel, the green pixel, the blue pixel, and the white pixel of the liquid crystal panel based on the image displayed on the display unit, the control unit controls to increase transmissivity of the white pixel of the display panel and decrease a light quantity of the backlight in a case where the display apparatus receives electric power supply from a battery as compared with a case where the display apparatus receives electric power supply from the outside power source via the input terminal, and the control unit controls the light quantity of the backlight such that a change of a display brightness of the image displayed on the display unit is suppressed when the display apparatus receives electric power supply from the battery and when the display apparatus receives electric power supply from the outside power source via the input terminal.