A display device and an OLED array substrate, the OLED array substrate includes a non-transparent display area and a transparent area, wherein the non-transparent area is provided with first OLED sub-pixels arranged in a first array and the transparent display area is provided with second OLED sub-pixels arranged in a second array; the first OLED sub-pixels are driven by a part of data signal channels of a display driver integrated chip, the second OLED sub-pixels are driven by a remaining part of the data signal channels of the display driver integrated chip; data in all the data signal channels correspond to one frame of screen display in the display area; when the second OLED sub-pixels are driven, the transparent display area performs a display function; when the second OLED sub-pixels are not driven, the transparent display area performs a light transmitting function.