A display device , comprising: a first display panel , being a liquid crystal display panel, and configured for regionalized brightness adjustment and comprising: a plurality of first pixel units , each comprising a first sub-pixel and a second sub-pixel , wherein the first sub-pixel and the second sub-pixel are configured to be switched together by being connected to a common active component (AC1) connected to a single scan line (SL) and a single data line (DL); a second display panel , being a liquid crystal display panel, and disposed above the first display panel and comprising a plurality of second pixel units , wherein each second pixel unit comprises a third sub-pixel , a fourth sub-pixel , and a fifth sub-pixel , wherein each of the third sub-pixel , the fourth sub-pixel , and the fifth sub-pixel comprises a driving layer and a color filter layer , each driving layer including a respective sub-pixel electrode (PE); and a backlight module , wherein the first display panel is located between the second display panel and the backlight module , wherein each first pixel unit is disposed corresponding to N second pixel units , where N is an integer satisfying 0 <N≦20; and each first pixel unit further comprises a first sub-pixel electrode (PE1) in the first sub-pixel , a second sub-pixel electrode (PE2) in the first sub-pixel , a common line (CM) and a common electrode (CE), wherein the common electrode (CE) is overlapped with both sub-pixel electrodes (PE1, PE2), and the common electrode (CE) and the common line (CM) are electrically connected to each other through a contact hole (CMV). a first display panel , being a liquid crystal display panel, and configured for regionalized brightness adjustment and comprising: a plurality of first pixel units , each comprising a first sub-pixel and a second sub-pixel , wherein the first sub-pixel and the second sub-pixel are configured to be switched together by being connected to a common active component (AC1) connected to a single scan line (SL) and a single data line (DL); a second display panel , being a liquid crystal display panel, and disposed above the first display panel and comprising a plurality of second pixel units , wherein each second pixel unit comprises a third sub-pixel , a fourth sub-pixel , and a fifth sub-pixel , wherein each of the third sub-pixel , the fourth sub-pixel , and the fifth sub-pixel comprises a driving layer and a color filter layer , each driving layer including a respective sub-pixel electrode (PE); and a backlight module , wherein the first display panel is located between the second display panel and the backlight module , wherein each first pixel unit is disposed corresponding to N second pixel units , where N is an integer satisfying 0 <N≦20; and each first pixel unit further comprises a first sub-pixel electrode (PE1) in the first sub-pixel , a second sub-pixel electrode (PE2) in the first sub-pixel , a common line (CM) and a common electrode (CE), wherein the common electrode (CE) is overlapped with both sub-pixel electrodes (PE1, PE2), and the common electrode (CE) and the common line (CM) are electrically connected to each other through a contact hole (CMV). <EOS>