Display panels and display devices

A display device, comprising a display panel comprising:

• a flexible screen body, having a first region and a second region connected with the first region, wherein:
• the second region has a bending transitional region, a bending region, and an extending region connected in sequence;
• the first region is connected to the bending region through the bending transitional region, and the bending transitional region is coplanar with the first region;
• neither the bending region nor the extending region is coplanar with the first region;
• the first region is a part of an active region of the flexible screen body;
• the bending region and the extending region are a non-active region of the flexible screen body;
• and the bending transitional region is another part of the active region;
• or the first region is an active region of the flexible screen body;
• the bending region and the extending region are a part of a non-active region of the flexible screen body;
• and the bending transitional region is another part of the non-active region of the flexible screen body;
• and a buffer layer disposed on surfaces of the bending transitional region and the bending region at a stress concentration side of the bending transitional region and the bending region, wherein at least two sections of the buffer layer have different hardnesses, wherein the buffer layer comprises a first sub-buffer layer and a second sub-buffer layer, the first sub-buffer layer covers the bending transitional region and a part of the bending region, the second sub-buffer layer covers another part of the bending region, and a hardness of the first sub-buffer layer is larger than a hardness of the second sub-buffer layer.