Display panel and display device

The embodiment of the invention provides a display panel and a display device. The display panel comprises a sensor; a substrate and a display area which is located on the substrate, wherein the display area comprises a first display area and a second display area, the projections of the sensor and the second display area in the substrate plane are at least partially overlapped, the second displayarea comprises a plurality of second pixel units, a high-light-transmittance area is arranged between every two adjacent second pixel units, and in the thickness direction of the display panel, the number of the film layers of the high-light-transmittance area is less than that of the film layers of the display area; and a first blocking dam which is positioned between the second pixel unit and the high-light-transmittance region. According to the invention, the sensor is arranged below the second display area, so that a real full screen is realized; the transmissivity of the second display area is improved by arrang