In an embodiment of the present disclosure, the first planarization insulating layer PLN1, the second planarization insulating layer PLN2, and the pixel defining layer PDL extend to the frame region and are disconnected at the recessed region 170, so that the first conductive layer 171 and the second conductive layer 172 are overlapped and electrically connected (e.g., directly contacted) in the recessed region 170. The electrode layer extending portion 17 includes the first conductive layer 171 and the second conductive layer 172 which are connected in parallel, the resistance of the electrode layer extending portion 17 can be reduced. By arranging the cover plate alignment marks 14 in the recessed region 170, it is able to avoid increasing the thickness of the display substrate in the recessed region 170, which is conducive to achieving the thinning of the display panel. It should be noted that