Display panel and display device thereof

A display panel comprises a substrate (110), a driving circuit layer (120) and a pixel defining layer (130). The driving circuit layer (120) is disposed on the substrate (110). The orthographic projection of the driving circuit layer (120) on the substrate (110) defines a plurality of light-transmitting areas (S). The pixel defining layer (130) is disposed on a side of the pixel circuit (121) away from the substrate (110). The pixel defining layer (130) is provided with a plurality of photosensitive openings (131), and orthographic projections of the photosensitive openings (131) on the substrate (110) are located in the light-transmitting area (S). The shape of the orthographic projection of the photosensitive opening (131) on the substrate (110) is substantially the same as the shape of the light-transmitting region (S).