Embodiments of the disclosure relate to a display device and a display driving method. A display device according to the disclosure may comprise a display panel where a plurality of subpixels are disposed, a gate driving circuit applying a gate signal to the display panel, a data driving circuit converting image data into a data voltage and applying the data voltage to the display panel, and a timing controller controlling a sensing process for detecting a sensing voltage for a subpixel characteristic value in a blank period and a data update process for updating the image data according to the sensing voltage. The data driving circuit may apply a gray voltage for controlling a luminance deviation in the data update process to the display panel.