A display panel, comprising: a base substrate, comprising a display region and a peripheral region surrounding the display region, the base substrate comprising a first substrate layer, a third substrate layer and a second substrate layer which are sequentially stacked, a material of the second substrate layer comprising amorphous silicon, wherein the display region comprises a transparent display region, the transparent display region comprises a pixel region and a light transmission region, the display panel further comprises a plurality of pixel units, located in the display region of the base substrate, wherein the display region comprises a first pixel density region and a second pixel density region, a pixel density of the pixel units located in the first pixel density region is greater than a pixel density of the pixel units located in the second pixel density region, and the transparent display region is located in the second pixel density region, the display panel comprises a thin film transistor, and the thin film transistor is located at one side of the third substrate layer away from the first substrate layer, characterized in that each of the plurality of pixel units comprises an organic light emitting layer, and a first electrode and a second electrode which are located at both sides of the organic light emitting layer, the second electrode is connected with the thin film transistor, and the second electrode of the pixel unit located in the transparent display region is located in the pixel region, a thickness of the second substrate layer located in the light transmission region is less than a thickness of at least part of the second substrate layer located outside the transparent display region, wherein the second substrate layer located in the transparent display region comprises a first pattern, and an orthographic projection of the first pattern on the first substrate layer coincides with an orthographic projection of the second electrode on the first substrate layer. a base substrate, comprising a display region and a peripheral region surrounding the display region, the base substrate comprising a first substrate layer, a third substrate layer and a second substrate layer which are sequentially stacked, a material of the second substrate layer comprising amorphous silicon, wherein the display region comprises a transparent display region, the transparent display region comprises a pixel region and a light transmission region, the display panel further comprises a plurality of pixel units, located in the display region of the base substrate, wherein the display region comprises a first pixel density region and a second pixel density region, a pixel density of the pixel units located in the first pixel density region is greater than a pixel density of the pixel units located in the second pixel density region, and the transparent display region is located in the second pixel density region, the display panel comprises a thin film transistor, and the thin film transistor is located at one side of the third substrate layer away from the first substrate layer, characterized in that each of the plurality of pixel units comprises an organic light emitting layer, and a first electrode and a second electrode which are located at both sides of the organic light emitting layer, the second electrode is connected with the thin film transistor, and the second electrode of the pixel unit located in the transparent display region is located in the pixel region, a thickness of the second substrate layer located in the light transmission region is less than a thickness of at least part of the second substrate layer located outside the transparent display region, wherein the second substrate layer located in the transparent display region comprises a first pattern, and an orthographic projection of the first pattern on the first substrate layer coincides with an orthographic projection of the second electrode on the first substrate layer.