Display device having different sizes of driving transistors in a pixel and a dummy pixel

A display device comprising:

• a display panel configured to display a display image and including a display area in which pixels are disposed, and a sub-display area surrounding the display area and in which dummy pixels are disposed;
• an image shift controller configured to generate a display image shift signal including information on a path through which the display image is shifted;
• and
• a controller configured to receive the display image shift signal to generate input image data to which the display image shift signal is applied,
• wherein the display area includes a first display area which covers a center of the display panel and a second display area surrounding the first display area,
• wherein a whole of the first display area and a whole of the second display area output the display image during a predetermined initial time, and the sub-display area does not output the display image during the predetermined initial time,
• wherein the whole of the first display area always outputs the display image while the display image is displayed, and the whole or a part of the second display area selectively outputs the display image during a second time in which the display image is shifted,
• wherein a size of a driving transistor included in each of the pixels disposed in the display area is different from a size of a driving transistor included in each of the dummy pixels disposed in the sub-display area,
• wherein a size of a gate electrode of the driving transistor disposed in the second display area is greater than a size of a gate electrode of the driving transistor included disposed in the sub-display area, and a size of a gate electrode of the driving transistor disposed in the first display area is greater than the size of the gate electrode of the driving transistor disposed in the second display area,
• wherein an active pattern of each driving transistor disposed in the first display area and the driving transistor disposed in the sub-display area includes a first bend, a second bend, a third bend, and a fourth bend, and
• wherein lengths of the active pattern between the first bend and the second bend, and between the third bend and the fourth bend of the driving transistor in the first display area are longer than lengths of the active pattern between the first bend and the second bend, and between the third bend and the fourth bend of the driving transistor in the sub-display area.