For example, FIG. 11 is a partial cross-sectional structural view of a display device according to another embodiment of the present disclosure. As shown in FIG. 11, the display device provided by the embodiment of the present disclosure includes any one of the above display panels. FIG. 11 illustratively shows that the display device includes the display panel shown in FIG. 3B, which is not limited thereto, and the display device can also include the display panel shown in any one of the embodiments as shown in FIG. 3A and FIGS. 6-10. As shown in FIG. 11, the display device includes a functional component 20 located in the transparent display region 221 and at a side opposite to a light emitting side of the display panel, and the functional component 20 is configured to emit or receive light passing through the transparent display region. For example, ambient light can be incident on the functional component 20 through the transparent display region 221. In the embodiment of the present disclosure, the transmittance of blue light in the transparent display region can be improved by setting the thickness of at least part of the second substrate layer in the transparent display region to be less than the thickness of the second substrate layer outside the transparent display region, so that the functional component can receive more blue light to improve performance.

For example, the functional component 20 is located at one side of the base substrate 10 away from the organic light emitting element.