A display device suitable for a vehicle and comprising: a first display panel that includes an electrochromic element and is configured to exhibit a color state to perform color display or a transmissive state; a second display panel that includes a polymer dispersed liquid crystal element, is stacked on the first display panel, and is configured to exhibit either a scatter state to scatter light or a transmissive state; a space between the first display panel and the second display panel; a light source unit being located either between the first display panel and the second display panel at one side portion of the space or adjacent the space, such that the light source unit is configured to emit light to the second display panel; an illuminance sensor configured to measure illuminance; and a control circuit configured to execute a first mode, a second mode, and a third mode according to a result of measurement by the illuminance sensor, wherein: in the first mode, the first display panel performs color display, the second display panel is set to a scatter state, and the light source unit is turned off; in the second mode, the first display panel performs color display, the second display panel is set to a transmissive state, and the light source unit is turned off; and in the third mode, the first display panel performs color display, the second display panel is set to a scatter state, and the light source unit is turned on. a first display panel that includes an electrochromic element and is configured to exhibit a color state to perform color display or a transmissive state; a second display panel that includes a polymer dispersed liquid crystal element, is stacked on the first display panel, and is configured to exhibit either a scatter state to scatter light or a transmissive state; a space between the first display panel and the second display panel; a light source unit being located either between the first display panel and the second display panel at one side portion of the space or adjacent the space, such that the light source unit is configured to emit light to the second display panel; an illuminance sensor configured to measure illuminance; and a control circuit configured to execute a first mode, a second mode, and a third mode according to a result of measurement by the illuminance sensor, wherein: in the first mode, the first display panel performs color display, the second display panel is set to a scatter state, and the light source unit is turned off; in the second mode, the first display panel performs color display, the second display panel is set to a transmissive state, and the light source unit is turned off; and in the third mode, the first display panel performs color display, the second display panel is set to a scatter state, and the light source unit is turned on. in the first mode, the first display panel performs color display, the second display panel is set to a scatter state, and the light source unit is turned off; in the second mode, the first display panel performs color display, the second display panel is set to a transmissive state, and the light source unit is turned off; and in the third mode, the first display panel performs color display, the second display panel is set to a scatter state, and the light source unit is turned on.