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WO-2026091053-A1 - FOLDABLE DISPLAY SCREEN AND FOLDABLE ELECTRONIC DEVICE

WO2026091053A1WO 2026091053 A1WO2026091053 A1WO 2026091053A1WO-2026091053-A1

Abstract

A foldable display screen (100) and a foldable electronic device (000). The foldable display screen (100) comprises a display layer (110) and a support layer (120). The display layer (110) comprises a first bending portion (114), a second bending portion (115), and a first display portion (111) connected between the first bending portion (114) and the second bending portion (115). The foldable display screen (100) can be folded or unfolded by means of the first bending portion (114) and the second bending portion (115); and when the foldable display screen (100) is in a folded state, the first display portion (111) is unfolded. When the foldable display screen (100) is in an unfolded state, a display surface of the first bending portion (114), a display surface of the first display portion (111), and a display surface of the second bending portion (115) are sequentially arranged in the same plane in a first direction. The support layer (120) is disposed on a non-display side of the display layer (110). The support layer (120) comprises a first support portion (121) corresponding to the first display portion (111). The first support portion (121) is provided with an opening area (121a), and the opening area (121a) is provided with through-holes (121c). The foldable display screen (100) can reduce the reverse camber height of a second bending portion (115) during the folding process, thereby reducing the risk of screen cracking and optical adhesive delamination.

Inventors

  • YAN, Bin
  • YU, Dengpan
  • JIANG, Guodong
  • LI, YULIANG

Assignees

  • 荣耀终端股份有限公司

Dates

Publication Date
20260507
Application Date
20241031

Claims (16)

  1. A foldable display screen, characterized in that the foldable display screen comprises: The display layer includes a first bending portion, a second bending portion, and a first display portion connected between the first bending portion and the second bending portion. The foldable display screen can be folded or unfolded through the first bending portion and the second bending portion. When the foldable display screen is in a folded state, the first display portion is flattened. When the foldable display screen is in a flattened state, the display surfaces of the first bending portion, the first display portion, and the second bending portion are arranged sequentially in the same plane along a first direction. A support layer; the support layer is disposed on the non-display side of the display layer; the support layer includes a first support portion corresponding to the first display portion; wherein, the first support portion includes an opening area, and the opening area has a through hole.
  2. The foldable display screen according to claim 1 is characterized in that both the opening area and the first support portion have a width in the first direction; The width of the opening area is 10% to 50% of the width of the first support portion.
  3. The foldable display screen according to claim 1 or 2 is characterized in that, in the first direction, the opening area is centrally disposed on the first support portion.
  4. The foldable display screen according to any one of claims 1 to 3 is characterized in that the bending equivalent modulus of the opening area is less than 50 MPa.
  5. The foldable display screen according to any one of claims 1 to 4 is characterized in that the opening area is provided with a plurality of columns of through holes spaced apart in the first direction, each column of through holes including one or more through holes spaced apart in the second direction; The second direction is the direction within the plane that is perpendicular to the first direction.
  6. According to claim 5, the foldable display screen is characterized in that the through holes between two adjacent columns are staggered.
  7. According to claim 5 or 6, the foldable display screen is characterized in that, when the foldable display screen switches from the flattened state to the folded state, the first bending portion is in the bending state before the second bending portion; in the direction from the first bending portion to the second bending portion, the width of the through holes between different columns decreases sequentially; the width of the through hole is the size of the through hole in the first direction.
  8. The foldable display screen according to any one of claims 5 to 7 is characterized in that, in the direction from the first bending portion to the second bending portion, the length of the through holes between different columns decreases sequentially; the length of the through hole is the size of the through hole in the second direction.
  9. According to claim 5 or 6, the foldable display screen is characterized in that, when the foldable display screen switches from the flattened state to the folded state, either the first bending portion or the second bending portion is in the bending state before the other bending portion. The multi-row through holes include a first row of through holes to the Nth row of through holes arranged sequentially along the direction from the first bend to the second bend; In the first column of through holes to the j-th column of through holes, the first size of the through holes between different columns decreases sequentially along the direction from the first bend to the second bend; From the j-th column to the N-th column of through holes, the second dimension of the through holes in different columns increases sequentially along the direction from the first bend to the second bend; where j is an integer less than N and greater than 1, and N... It is an integer greater than 2; the first dimension and the second dimension are length and/or width.
  10. The foldable display screen according to any one of claims 1 to 9 is characterized in that the through hole is an elongated hole, and the length direction of the through hole extends in the second direction; The second direction is the direction within the plane that is perpendicular to the first direction.
  11. According to claim 10, the foldable display screen is characterized in that the ratio of the length of the through hole in the second direction to its width in the first direction is 10 to 100.
  12. The foldable display screen according to any one of claims 1 to 11 is characterized in that the first support portion further includes two non-perforated areas; One of the non-perforated areas is located on one side of the perforated area in the second direction, and the other non-perforated area is located on the other side of the perforated area in the second direction.
  13. The foldable display screen according to claim 12 is characterized in that the dimension of the non-perforated area in the second direction is 2mm to 10mm.
  14. A foldable electronic device, characterized in that it comprises: Support components; The foldable display screen as claimed in any one of claims 1 to 13; the foldable display screen is connected to the support assembly via the support layer and switches between the folded state and the flattened state based on the support assembly.
  15. The foldable electronic device according to claim 14, wherein the display layer further comprises a second display portion and a third display portion, the first bending portion is connected between the first display portion and the second display portion, and the second bending portion is connected between the first display portion and the third display portion; The support assembly includes a first housing, a second housing, a third housing, a first hinge, and a second hinge; the first housing is located between the second housing and the third housing, and is rotatably connected to the second housing via the first hinge, and rotatably connected to the third housing via the second hinge; The first display unit is fixed to the first housing via the first support unit, the second display unit is fixed to the second housing via the second support unit corresponding to the support layer, and the third display unit is fixed to the third housing via the third support unit corresponding to the support layer; the first bending part is movably disposed on the first hinge via the first bending fitting part corresponding to the support layer, and bends based on the first hinge; the second bending part is movably disposed on the second hinge via the second bending fitting part corresponding to the support layer, and bends based on the second hinge.
  16. The foldable electronic device according to claim 15 is characterized in that the opening area and the first housing are movably disposed between them.

Description

Foldable displays and foldable electronic devices Technical Field This application belongs to the field of foldable screen technology, and in particular relates to a foldable display screen and electronic device. Background Technology With the growing demand for larger screens, more and more manufacturers are launching foldable electronic devices that support three-fold or more folds. This application refers to such electronic devices as multi-fold electronic devices. Multi-fold electronic devices can provide a greater display aspect ratio and have broad application prospects. During the folding process of multi-fold electronic devices, the display screen is prone to large arching in the bending area, which can cause screen cracking and optical adhesive peeling. Summary of the Invention This application provides a foldable display screen and a foldable electronic device, which can reduce the arching height of the bending area of the display screen during the folding process of the multi-fold electronic device, thereby reducing the risk of screen breakage and optical adhesive peeling, and improving the reliability of the foldable display screen. To achieve the above objectives, the embodiments of this application adopt the following technical solutions: In a first aspect, embodiments of this application provide a foldable display screen. The foldable display screen includes a display layer and a support layer. The display layer includes a first bending portion, a second bending portion, and a first display portion connected between the first bending portion and the second bending portion. The foldable display screen can be folded or unfolded via the first bending portion and the second bending portion; when the foldable display screen is in a folded state, the first display portion is flattened. When the foldable display screen is flattened, the display surfaces of the first bending portion, the first display portion, and the second bending portion are sequentially arranged in the same plane along a first direction. The support layer is disposed on the non-display side of the display layer. The support layer includes a first support portion corresponding to the first display portion, that is, the first support portion is the area of the support layer directly opposite the first display portion in the thickness direction of the foldable display screen. The first support portion has an opening area with through holes. It should be noted that since the aforementioned arch protrudes towards the display side of the foldable display screen, that is, when the foldable display screen is used in a foldable electronic device, it protrudes away from the hinge of the foldable electronic device, therefore, in this application embodiment, the aforementioned arch is also referred to as an anti-arch, and correspondingly, the arch height is also referred to as the anti-arch height. In this foldable display screen, by providing an opening area with through holes on the first support portion, the bending equivalent modulus of the opening area can be reduced. The flexural equivalent modulus is a parameter used in structural engineering to describe a material's ability to resist deformation under bending loads. The lower the flexural equivalent modulus, the more easily it deforms under bending forces. This means that such structures can absorb more energy during bending and exhibit better flexibility. During the folding process of the foldable display (e.g., in a half-folded state), taking the part of the foldable display corresponding to the first bend (hereinafter referred to as the first bend area) as an example, when the redundant amount caused by the first bend area is transferred to the opening area, due to the reduction of the bending equivalent modulus of the opening area, the opening area deforms and causes the upper display layer to deform as well. This absorbs part of the redundant amount that would have moved to the part of the foldable display corresponding to the second bend (hereinafter referred to as the second bend area) and caused the second bend area to arch back, thereby reducing the arch height of the second bend area. As the anti-arch height of the second bending zone decreases, the risk of screen breakage and optical adhesive peeling is also reduced, thus improving the reliability of the foldable display. It should be noted that in some other embodiments, the second bending area may be bent first during the folding process of the foldable display screen, and this application does not limit this. In some embodiments of this application, both the opening area and the first support portion have a width in a first direction. The width of the opening area is 10% to 50% of the width of the first support portion. Exemplarily, the width of the opening area is 10%, 15%, 20%, 31%, 45%, or 49% of the width of the first support portion. It should be noted that if the width of the opening area is too low, the reduction