Supporting plate and foldable display device

A foldable display device, comprising a supporting plate and a flexible display panel disposed on a side of the supporting plate, the supporting plate comprises at least one bending region and non-bending regions located on two sides of the bending region, the bending region comprises two semi-bending regions bent symmetrically along a bending axis, and any of the semi-bending regions comprises:

• an internal bending region located on an end away from the non-bending regions;
• and
• an outer bending region located on an end close to the non-bending regions and having a bending direction opposite to the internal bending region,
• wherein the semi-bending regions comprise a plurality of openings spaced apart, a distribution density of the openings in the internal bending region is a first distribution density, and a distribution density of the openings in the outer bending region is a second distribution density, and wherein the first distribution density is greater than the second distribution density, and
• wherein the outer bending region comprises a first sub-externally bending region away from the non-bending regions and a second sub-externally bending region close to the non-bending regions, and the openings on the outer bending region are all located in the first sub-externally bending region, the first lengths of the openings of the semi-bending regions are gradually decreased from the internal bending region to the transition region and are gradually increased from the transition region to the first sub-externally bending region, a bending radius of curvature of the semi-bending regions is gradually increased from the internal bending region to the transition region and is gradually decreased from the transition region to the first sub-externally bending region,
• the flexible display panel comprises at least one bending part and non-bending parts located on two sides of the bending part,
• wherein the bending part corresponds to the bending region of the supporting plate,
• the bending part comprises two semi-bending parts symmetrically bent along the same bending axis as the supporting plate, and
• any of the semi-bending parts comprises an internal bending portion corresponding to the internal bending region of the supporting plate and an outer bending portion corresponding to the outer bending region of the supporting plate.