A display control apparatus comprising: an image supply unit to provide an input image; a display control unit configured to distribute brightness information to a plurality of stacked display devices (41, 42) connectable with the display control apparatus, wherein the display device stacked on the upper surface is an organic light-emitting diode, OLED, device and the display device stacked on the lower surface is an electronic paper, ePaper, display device; a sensor configured to acquire external light amount information; a plurality of drive units configured to drive the plurality of display devices on a basis of the brightness information distributed by the display control unit; wherein the display control unit comprises: a weight computation unit configured to compute a display weight (w) for coordinates of an input image on a basis of image feature information (a) of the input image, remaining battery power information (b), and per-pixel motion information (m) of the input image, wherein the image feature information comprises an indication of whether an area of an input image is a text area or a graphic area; a display brightness computation unit configured to receive the input image from the image supply unit, the per-pixel incident light information (s) from the sensor, the total incident light information (t) from the sensor and the display weight (w) from the weight calculation unit, and to obtain a target maximum luminance from the total incident light information (t) and the display weight information (w), and to calculate a display output value by calculating the image data of the input image with the ratio obtained by the target maximum luminance; an ePaper display brightness computation unit configured to obtain per-pixel light information from the sensor, the display weight (w) computed by the weight computation unit, and the display output value computed by the display brightness computation unit, to compute a per-pixel ePaper display brightness in dependence upon these, and to output the computed per-pixel ePaper display brightness to the ePaper display device; and an OLED display brightness computation unit configured to obtain the display weight (w) from the weight computation unit, the display output value computed by the display brightness computation unit, and the per-pixel ePaper display brightness computed by the ePaper display brightness computation unit, to compute a per-pixel OLED display brightness in dependence upon these, and to output the computed per-pixel OLED display brightness to the OLED display device. an image supply unit to provide an input image; a display control unit configured to distribute brightness information to a plurality of stacked display devices (41, 42) connectable with the display control apparatus, wherein the display device stacked on the upper surface is an organic light-emitting diode, OLED, device and the display device stacked on the lower surface is an electronic paper, ePaper, display device; a sensor configured to acquire external light amount information; a plurality of drive units configured to drive the plurality of display devices on a basis of the brightness information distributed by the display control unit; a weight computation unit configured to compute a display weight (w) for coordinates of an input image on a basis of image feature information (a) of the input image, remaining battery power information (b), and per-pixel motion information (m) of the input image, wherein the image feature information comprises an indication of whether an area of an input image is a text area or a graphic area; a display brightness computation unit configured to receive the input image from the image supply unit, the per-pixel incident light information (s) from the sensor, the total incident light information (t) from the sensor and the display weight (w) from the weight calculation unit, and to obtain a target maximum luminance from the total incident light information (t) and the display weight information (w), and to calculate a display output value by calculating the image data of the input image with the ratio obtained by the target maximum luminance; an ePaper display brightness computation unit configured to obtain per-pixel light information from the sensor, the display weight (w) computed by the weight computation unit, and the display output value computed by the display brightness computation unit, to compute a per-pixel ePaper display brightness in dependence upon these, and to output the computed per-pixel ePaper display brightness to the ePaper display device; and an OLED display brightness computation unit configured to obtain the display weight (w) from the weight computation unit, the display output value computed by the display brightness computation unit, and the per-pixel ePaper display brightness computed by the ePaper display brightness computation unit, to compute a per-pixel OLED display brightness in dependence upon these, and to output the computed per-pixel OLED display brightness to the OLED display device.