Display device and formation method thereof

A display device, comprising:

• a flexible display panel;
• a bending auxiliary layer, fixed on a first surface of the flexible display panel;
• a support plate, at a side of the bending auxiliary layer away from the flexible display panel;
• and
• an adhesive layer, between the bending auxiliary layer and the support plate, configured to fix the bending auxiliary layer to the support plate, wherein:
• a region wherein the bending auxiliary layer and the support plate are overlapped with each other includes a first region and a second region;
• a sum of thicknesses of the bending auxiliary layer and the support plate in the first region is less than a sum of thicknesses of the bending auxiliary layer and the support plate in the second region;
• the adhesive layer is in the first region and not in the second region;
• the flexible display panel includes a first bendable portion and non-bendable portions at two opposite sides of the first bendable portion;
• the bending auxiliary layer extends from one of the non-bendable portions to the other one of the non-bendable portions through the first bendable portion;
• and
• the display device includes a bent state and an unbent state, wherein in the bent state, the flexible display panel is at an inner side of the bending auxiliary layer;
• and in the unbent state, a portion of the support plate in the first region overlaps the non-bendable portions, and a portion of the support plate in the second region overlaps the first bendable portion.