image frames of an image to be displayed the motion detector 120 detects motion values from front and back image frames input through the image input interface 110 the controller 130 controls overall operations of the elements of the display apparatus 100 in particular in an exemplary embodiment the controller 130 analyzes the motion values detected by the motion detector 120 to determine whether a scene change occurs in each preset time unit or period of time and adjusts a brightness value of an image frame to be displayed according to the determination result in detail according to an exemplary embodiment if front and back image frames are input through the image input interface 110 the motion detector 120 detects motion values of the front and back image frames from a sum of brightness differences of pixels constituting the input front and back image frames according to exemplary embodiments a first image frame may be input and then a second image frame may be input through the image input interface 110 if consecutive first and second image frames are input as described above the motion detector 120 acquires a difference between brightness of pixels of the first image frame and brightness of pixels of the second image frame the motion detector 120 may sum values of the differences of the pixels of the first and second image frames to detect the summed result value as a motion value of the first and second image frames according to an exemplary embodiment if the motion values of the front and back image frames are detected the controller 130 may determine whether the motion values detected from the front and back image frames are higher than.