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CN-122024589-A - Flexible display module and foldable display device

CN122024589ACN 122024589 ACN122024589 ACN 122024589ACN-122024589-A

Abstract

The application relates to the technical field of foldable display devices, in particular to a flexible display module and a foldable display device. The application aims to solve the problem that permanent folds appear in the bending area of the flexible display module due to repeated folding and unfolding actions. Therefore, the first compensation structure and the second compensation structure which are covered by the display panel are respectively arranged on two sides of the channel width direction on the support layer, so that the flexible display module can interact when the flexible display module is in a flattened state to provide compensation force towards the support layer for the bending region of the display panel, and the compensation force can resist stress which is generated on the bending region of the display panel and is far away from the support layer when the flexible display module is restored to the flattened state, thereby remarkably improving the crease problem of the bending region, ensuring the flatness of the display panel, and further improving the display effect of the foldable display device.

Inventors

  • LI HAIYANG
  • ZHANG MI
  • NIU WENXIAO
  • LUO TINGTING
  • MIN HANG
  • WU RUIQI
  • HE LIU

Assignees

  • 京东方科技集团股份有限公司
  • 绵阳京东方光电科技有限公司

Dates

Publication Date
20260512
Application Date
20260331

Claims (11)

  1. 1. The utility model provides a flexible display module assembly, its characterized in that, flexible display module assembly (1) includes two at least non-bending areas (16) and is located bending area (17) between two adjacent non-bending areas (16), flexible display module assembly (1) still includes: A display panel (11); A support layer (15), the support layer (15) being disposed on a backlight side of the display panel (11), and a channel (151) penetrating a thickness direction thereof being disposed in a region located at the bending region (17), the channel (151) extending along a bending axis of the bending region (17) so that the support layer (15) can be folded or flattened along the channel (151); The flexible display module comprises a first compensation structure (12) and a second compensation structure (13) which are positioned in a bending area (17), wherein the first compensation structure (12) and the second compensation structure (13) are arranged between a supporting layer (15) and a display panel (11) in the same layer and are respectively arranged on two opposite sides of the width direction of a channel (151), and the first compensation structure (12) and the second compensation structure (13) are arranged to be capable of interacting to provide compensation force towards the supporting layer (15) along the thickness direction of the bending area (17) of the display panel (11) when the flexible display module (1) is in a folding state.
  2. 2. A flexible display module according to claim 1, wherein the first compensation structure (12) comprises a first magnetic structure (121) and a first elastic structure (122), the first elastic structure (122) being arranged on a side of the first magnetic structure (121) facing the support layer (15) in a thickness direction of the display panel (11); The second compensation structure (13) comprises a second magnetic structure (131) and a second elastic structure (132), and the second elastic structure (132) is arranged on one side of the second magnetic structure (131) facing the supporting layer (15) along the thickness direction of the display panel (11); the second magnetic structure (131) and the first magnetic structure (121) have the same magnetic pole arrangement in the thickness direction of the display panel (11).
  3. 3. A flexible display module according to claim 2, wherein, The display panel (11) includes: The bottom film layer (111), the bottom film layer (111) is arranged on the supporting layer (15) and is arranged on the same layer with the first elastic structure (122) and the second elastic structure (132); And a flexible substrate (112), wherein the flexible substrate (112) is arranged on one side of the bottom film layer (111) far away from the supporting layer (15) along the thickness direction of the display panel (11), and is arranged on the same layer as the first magnetic structure (121) and the second magnetic structure (131).
  4. 4. A flexible display module according to claim 1, characterized in that the first compensation structure (12) comprises a first magnetic structure (121) and the second compensation structure (13) comprises a second magnetic structure (131), the first magnetic structure (121) and the second magnetic structure (131) having opposite magnetic pole arrangements in the thickness direction of the display panel (11).
  5. 5. A flexible display module according to claim 4, wherein the first compensation structure (12) further comprises a first elastic structure (122), the first elastic structure (122) being disposed on a side of the first magnetic structure (121) away from the supporting layer (15) in a thickness direction of the display panel (11), and The second compensation structure (13) further comprises a second elastic structure (132), and the second elastic structure (132) is arranged on one side, away from the supporting layer (15), of the second magnetic structure (131) along the thickness direction of the display panel (11).
  6. 6. A flexible display module according to claim 5, wherein the compression modulus of the first elastic structure (122) and the compression modulus of the second elastic structure (132) are both smaller than the compression modulus of the display panel (11).
  7. 7. A flexible display module according to claim 5, characterized in that the display panel (11) comprises: the bottom film layer (111), the bottom film layer (111) is arranged on the supporting layer (15) and is arranged on the same layer with the first magnetic structure (121) and the second magnetic structure (131); And a flexible substrate (112), wherein the flexible substrate (112) is arranged on one side of the bottom film layer (111) far away from the supporting layer (15) along the thickness direction of the display panel (11), and is arranged on the same layer as the first elastic structure (122) and the second elastic structure (132).
  8. 8. A flexible display module according to claim 3 or 7, characterized in that the display panel (11) further comprises: A circuit layer (113), the circuit layer (113) being disposed on a side of the flexible substrate (112) away from the support layer (15) in a thickness direction of the display panel (11); A light emitting layer (114), the light emitting layer (114) being disposed on a side of the circuit layer (113) away from the support layer (15) in a thickness direction of the display panel (11); And a cover plate (115), wherein the cover plate (115) is arranged on one side of the light-emitting layer (114) away from the circuit layer (113) along the thickness direction of the display panel (11).
  9. 9. A flexible display module according to claim 2 or 4, characterized in that the flexible display module (1) further comprises: And the magnetic shielding structure is arranged on one side of the first magnetic structure (121) facing the second magnetic structure (131) along the width direction of the channel (151) and/or one side of the second magnetic structure (131) facing the first magnetic structure (121) along the width direction of the channel (151).
  10. 10. A flexible display module according to claim 1, characterized in that in the thickness direction of the display panel (11) the orthographic projections of the first compensation structure (12) and the second compensation structure (13) on the support layer (15) are at least partly located on the support layer (15).
  11. 11. A foldable display device, characterized in that it comprises the flexible display module of any one of claims 1-10.

Description

Flexible display module and foldable display device Technical Field The invention relates to the technical field of foldable display devices, in particular to a flexible display module and a foldable display device. Background The foldable display device is used as an important branch of a flexible display technology, can be switched between a flattened state and a folded state, and has the advantages of large-size display effect and small-size portability. However, in the long-term use process, the bending region of the flexible display module is repeatedly subjected to the folding and unfolding actions, so that the region is subjected to the cyclic stress action and gradually generates unrecoverable plastic deformation. The deformation can form permanent folds in the bending area of the display panel, so that the display uniformity is affected, and the visual experience of a user is reduced. Accordingly, there is a need in the art for a new solution to the above-mentioned problems. Disclosure of Invention In order to solve at least one of the above problems in the prior art, namely, to solve the problem that the bending area of the flexible display module assembly in the prior art has permanent folds due to repeated folding and unfolding actions. The application provides a flexible display module which comprises at least two non-bending areas and bending areas positioned between two adjacent non-bending areas, and further comprises a display panel, a support layer, a first compensation structure and a second compensation structure, wherein the support layer is arranged on the backlight side of the display panel, a channel penetrating through the thickness direction of the support layer is arranged in the area positioned in the bending areas, the channel extends along the bending axis of the bending areas so that the support layer can be folded or flattened along the channel, the first compensation structure and the second compensation structure are positioned in the bending areas, are arranged between the support layer and the display panel in the same layer and are respectively arranged on two opposite sides of the width direction of the channel, and the first compensation structure and the second compensation structure are arranged to be capable of interacting to provide compensation force towards the support layer along the thickness direction of the bending areas of the display panel when the flexible display module is in a folded state. In the preferable technical scheme of the flexible display module, the first compensation structure comprises a first magnetic structure and a first elastic structure, the first elastic structure is arranged on one side of the first magnetic structure, facing the supporting layer, along the thickness direction of the display panel, the second compensation structure comprises a second magnetic structure and a second elastic structure, the second elastic structure is arranged on one side of the second magnetic structure, facing the supporting layer, along the thickness direction of the display panel, and the second magnetic structure and the first magnetic structure are arranged with the same magnetic poles along the thickness direction of the display panel. In the preferable technical scheme of the flexible display module, the display panel comprises a bottom film layer and a flexible substrate, wherein the bottom film layer is arranged on the supporting layer and is arranged on the same layer as the first elastic structure and the second elastic structure, and the flexible substrate is arranged on one side, far away from the supporting layer, of the bottom film layer along the thickness direction of the display panel and is arranged on the same layer as the first magnetic structure and the second magnetic structure. In the preferred technical scheme of the flexible display module, the first compensation structure comprises a first magnetic structure, the second compensation structure comprises a second magnetic structure, and the first magnetic structure and the second magnetic structure have opposite magnetic pole arrangement in the thickness direction of the display panel. In the preferable technical scheme of the flexible display module, the first compensation structure further comprises a first elastic structure, the first elastic structure is arranged on one side, far away from the supporting layer, of the first magnetic structure along the thickness direction of the display panel, and the second compensation structure further comprises a second elastic structure, and the second elastic structure is arranged on one side, far away from the supporting layer, of the second magnetic structure along the thickness direction of the display panel. In the preferred technical solution of the flexible display module, the compression modulus of the first elastic structure and the compression modulus of the second elastic structure are smaller than the compression modulus of