The invention relates to the technical field of liquid crystal display, and provides an array substrate, a display panel, a display device and a control method of the display device. A pixel region of the array substrate is divided into a plurality of sets, each set of the pixel region corresponds to a set of independent public electrodes, and each set of independent public electrodes corresponds to an independent public voltage. In the technical scheme of the invention, the pixels within the pixel region are divided into the plurality of sets, and the voltage of the public electrodes corresponding to each set of pixels can be respectively and independently controlled, so that the Gamma curves of the different sets of pixels can be independently adjusted when the display panel is debugged, therefore, the luminance impression of each set of pixels to users is similar, the display quality of the display device can be improved, and the control of the image display quality can be realized.