Support plate and foldable display

1. A support plate, comprising:

a support plate body having at least one patterned region; and

a plurality of through holes disposed in the at least one patterned region and penetrating through the support plate body in a thickness direction of the support plate body, a projection of each through hole on a first plane perpendicular to the thickness direction of the support plate body being strip-shaped;

each of the plurality of through holes extends in a first direction on the first plane;

wherein the plurality of through holes are arranged in a plurality of columns of through holes in a second direction, and any two adjacent columns of through holes are spaced apart; each column of through holes includes at least one through hole arranged in the first direction; the second direction is perpendicular to the first direction on the first plane;

wherein a maximum value A max of lengths of the plurality of through holes in the first direction, a minimum value C min of first distances each between any through hole in a column of through holes and any through hole in an adjacent column of through holes in the second direction, and a bending radius R of the support plate body bending along a bending line parallel to the first direction in the at least one patterned region satisfy a formula:

1

⁢

0

6

×

C

min

3

R

×

A

max

3

≤

30

⁢

mm

-

1

;

where a length of each through hole in the first direction is a maximum length of the through hole in the first direction, and the maximum value A max is a maximum value of a plurality of maximum lengths; a first distance between any through hole in a column of through holes and any through hole in an adjacent column of through holes in the second direction is a minimum first distance of the two through holes in the second direction, and the minimum value C min is a minimum value of a plurality of minimum first distances; units of the maximum value A max , the minimum value C min and the bending radius R are the same;

wherein the minimum value C min and a thickness t of the support plate body satisfy a condition that t:C min =1˜4;

wherein a maximum value D max of widths of the plurality of through holes in the second direction and the minimum value C min satisfy a condition that D max :C min =1˜5; a width of each through hole in the second direction is a maximum width of the through hole in the second direction, and the maximum value D max is a maximum value of a plurality of maximum widths;

wherein a minimum value B min of second distances each between every two adjacent through holes in a same column of through holes in the first direction and the minimum value C min satisfy a condition that B min :C min =0.5˜4; a second distance between every two adjacent through holes in the first direction is a minimum second distance of the two through holes in the first direction, and the minimum value B min is a minimum value of a plurality of minimum second distances.

2. The support plate according to claim 1 , wherein a projection of at least one of the plurality of through holes on the first plane is in a rectangular shape.

3. The support plate according to claim 1 , wherein a projection of at least one of the plurality of through holes on the first plane is in a rectangular shape with rounded corners.

4. The support plate according to claim 1 , wherein a projection of at least one of the plurality of through holes on the first plane is in a closed shape composed of two straight line portions and two curved line portions; the two straight line portions extend in a first direction, each end of one straight line portion is aligned with one end of another straight line portion in a second direction, and the second direction is perpendicular to the first direction on the first plane; each curved line portion is connected to respective ends of the two straight portions that are aligned with each other.

5. The support plate according to claim 4 , wherein each curved line portion is a semicircle.

6. The support plate according to claim 1 , wherein each column of through holes includes through holes arranged in the first direction;

in any two adjacent columns of the plurality of columns of through holes, in addition to two through holes at two ends of one column of through holes, a projection of any through hole of the one column of through holes on a second plane perpendicular to the second direction is overlapped with projections of two adjacent through holes in another column of through holes on the second plane perpendicular to the second direction;

a projection of each of the two through holes at the two ends on the second plane perpendicular to the second direction is overlapped with a projection of one through hole or projections of two adjacent through holes in the another column of through holes on the second plane perpendicular to the second direction.

7. The support plate according to claim 6 , wherein a projection of a portion between any two through holes in the one column of through holes on the second plane is located in a middle of a projection of one through hole in the another column of through holes on the second plane.

8. The support plate according to claim 1 , wherein the maximum value A max and the minimum value B min satisfy a condition that A max :B min =10˜100.

9. The support plate according to claim 1 , wherein first distances each between any through hole in a column of through holes and any through hole in an adjacent column of through holes in the second direction are equal.

10. The support plate according to claim 1 , wherein the maximum length of each through hole in the first direction is within a range of 1 mm to 50 mm, and a thickness t of the support plate body is within a range of 0.01 mm to 0.5 mm.

11. A foldable display, comprising:

a flexible display panel having a bending display portion;

the support plate according to claim 1 , the support plate being disposed on a side of the flexible display panel opposite to a light exit side of the flexible display panel, an orthogonal projection of the bending display portion of the flexible display panel on the first plane being overlapped with an orthogonal projection of each of the at least one patterned region on the first plane.

12. The foldable display according to claim 11 , wherein the at least one patterned region includes one patterned region, and the orthogonal projection of the bending display portion of the flexible display panel on the first plane is located in the orthogonal projection of the patterned region on the first plane.

13. The foldable display according to claim 12 , wherein each of the plurality of through holes extends in a first direction on the first plane, and the bending display portion of the flexible display panel is bent along a bending line parallel to the first direction.