Display control device, display device, and display control method

A display control device that controls switching between a first image and a second image in a display device that includes a first image generation unit including a first light source unit and a first display unit and a second image generation unit including a second light source unit and a second display unit and is capable of displaying, through switching, the first image or the second image by using the first image generation unit or the second image generation unit through switching, the display control device comprising a control unit that, in a switching period when display by one image generation unit out of the first image generation unit and the second image generation unit is terminated and display by the other image generation unit is started,

• performs a parallel control in which a display start operation is performed in the other image generation unit in parallel with a display termination operation in the one image generation unit,
• performs a conjunctive control in which an operation timing of the other image generation unit is determined with an operation timing of the one image generation unit as a starting point, and
• performs an overlapping lighting suppression control that prevents an ON period of the light source unit in the one image generation unit and an ON period of the light source unit in the other image generation unit from temporally overlapping each other in at least a partial period in the switching period.