Support backplane, flexible display screen, and electronic device

Patent metadata

Field	Value
Publication number	US-12416945-B2
Application number	US-202117790860-A
Country	US
Kind code	B2
Filing date	Jun 3, 2021
Priority date	Jun 16, 2020
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A support backplane includes a first support portion, a second support portion, and a third support portion connected in sequence. The first support portion has a first rollable flexible structure in a first area, and the first area is a partial area of the first support portion. The second support portion has a second rollable flexible structure in a second area, and the second area is a partial area of the second support portion. The second rollable flexible structure is matched with the first rollable flexible structure, so as to constitute a foldable structure in the first area and the second area. The third support portion has a third rollable flexible structure in an entire area of the third support portion, so that the third support portion constitutes a slidably rolled structure that is able to be unfolded or rolled up.

First claim

What is claimed is:

1. A support backplane, comprising a first support portion, a second support portion and a third support portion that are connected in sequence; wherein
the first support portion has a first rollable flexible structure in a first area, and the first area is a partial area of the first support portion;
the second support portion has a second rollable flexible structure in a second area, and the second area is a partial area of the second support portion; and the second rollable flexible structure is matched with the first rollable flexible structure, so as to constitute a foldable structure in the first area and the second area; and
the third support portion has a third rollable flexible structure in an entire area of the third support portion, so that the third support portion integrally constitutes a slidably rolled structure that is able to be unfolded or rolled up, wherein
the first rollable flexible structure includes a single-stage rollable flexible structure; or
the second rollable flexible structure includes the single-stage rollable flexible structure; or
the third rollable flexible structure includes the single-stage rollable flexible structure; or
each of the first rollable flexible structure and the second rollable flexible structure includes the single-stage rollable flexible structure; or
each of the first rollable flexible structure and the third rollable flexible structure includes the single-stage rollable flexible structure; or
each of the second rollable flexible structure and the third rollable flexible structure includes the single-stage rollable flexible structure; or
each of the first rollable flexible structure, the second rollable flexible structure and the third rollable flexible structure includes the single-stage rollable flexible structure,
wherein the single-stage rollable flexible structure includes a plurality of support strips arranged according to a predetermined layout,
wherein the predetermined layout includes a case that: the plurality of support strips are independent of each other and arranged at intervals in sequence in a first direction;
wherein when the support backplane is in a completely folded state,
the first support portion, the second support portion and the third support portion are parallel to each other, and
the first support portion is stored between the second support portion and the third support portion; and
when the third support portion in a completely unfolded state, an end of the third support portion away from the second support portion exhibits a U-shaped folded structure.

2. The support backplane according to claim 1 , wherein
the first area is a partial area of the first support portion close to the second support portion, and the second area is a partial area of the second support portion close to the first support portion; and the first area is adjacent to the second area; and
the first rollable flexible structure is connected to the second rollable flexible structure.

3. The support backplane according to claim 1 , wherein
the first support portion, the second support portion and the third support portion are connected in sequence in the first direction.

4. The support backplane according to claim 1 , wherein
the predetermined layout further includes a case that each of the plurality of support strips extends in a second direction perpendicular to the first direction.

5. The support backplane according to claim 1 , further comprising:
a flexible connection layer, the first support portion, the second support portion and the third support portion being disposed on a surface of the flexible connection layer.

6. The support backplane according to claim 5 , wherein
the flexible connection layer includes first filling portions each embedded into a gap between adjacent support strips.

7. The support backplane according to claim 5 , wherein
a material of the flexible connection layer includes silica gel; or
the flexible connection layer is a silica gel layer formed by injection molding.

8. A flexible display screen, comprising:
the support backplane according to claim 1 .

9. An electronic device, comprising:
the flexible display screen according to claim 8 .

10. A support backplane, comprising a first support portion, a second support portion and a third support portion that are connected in sequence; wherein
the first support portion has a first rollable flexible structure in a first area, and the first area is a partial area of the first support portion;
the second support portion has a second rollable flexible structure in a second area, and the second area is a partial area of the second support portion; and the second rollable flexible structure is matched with the first rollable flexible structure, so as to constitute a foldable structure in the first area and the second area; and
the third support portion has a third rollable flexible structure in an entire area of the third support portion, so that the third support portion integrally constitutes a slidably rolled structure that is able to be unfolded or rolled up, wherein
the first rollable flexible structure includes a multi-stage rollable flexible structure; or
the second rollable flexible structure includes the multi-stage rollable flexible structure; or
the third rollable flexible structure includes the multi-stage rollable flexible structure;
each of the first rollable flexible structure and the second rollable flexible structure includes the multi-stage rollable flexible structure; or
each of the first rollable flexible structure and the third rollable flexible structure includes the multi-stage rollable flexible structure; or
each of the second rollable flexible structure and the third rollable flexible structure includes the multi-stage rollable flexible structure; or
each of the first rollable flexible structure, the second rollable flexible structure and the third rollable flexible structure includes the multi-stage rollable flexible structure,
wherein the multi-stage rollable flexible structure is a support plate with a plurality of through holes,
wherein the first support portion, the second support portion and the third support portion are connected in sequence in a first direction; the plurality of through holes in the multi-stage rollable flexible structure are arranged in a plurality of rows, and all of through holes in each row are arranged at intervals in sequence in the first direction,
wherein through holes in a row are staggered from through holes in an adjacent row; and along a second direction perpendicular to the first direction, a gap exists between each of the through holes in the row and each of the through holes in the adjacent row;
wherein when the support backplane is in a completely folded state,
the first support portion, the second support portion and the third support portion are parallel to each other, and
the first support portion is stored between the second support portion and the third support portion; and
when the third support portion in a completely unfolded state, an end of the third support portion away from the second support portion exhibits a U-shaped folded structure.

11. The support backplane according to claim 10 , wherein
the plurality of through holes are strip-shaped holes extending in the second direction; and
widths of through holes in a same row are equal.

12. The support backplane according to claim 10 , wherein
the plurality of through holes are manufactured by etching.

13. The support backplane according to claim 10 , wherein
the first area is a partial area of the first support portion close

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Xie Zhihao
• Feng Binfeng
• Xiao Bowen

Classifications

• G06F1/1652 Primary

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title

• G06F1/1641

  the display being formed by a plurality of foldable display components (G06F1/1647 takes precedence) · CPC title

• G06F1/1616

  with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position · CPC title

• H10K2102/311

  Flexible OLED · CPC title

• H10K77/111

  Flexible substrates · CPC title