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CN-121982974-A - Display module

CN121982974ACN 121982974 ACN121982974 ACN 121982974ACN-121982974-A

Abstract

The application discloses a display module, which comprises a display panel, a first supporting layer and a first protective layer, wherein the first supporting layer is positioned on one side of the display panel, and the edge of one side of the first supporting layer is a bending starting point of the display panel. The first protective layer is located one side of the display panel, which is away from the first supporting layer, wherein the first protective layer comprises a stress concentration area and a stress dispersion area, orthographic projection of the edge of the first supporting layer on the first protective layer is located in the stress concentration area, and the stress dispersion area is located on one side of the stress concentration area, which is away from the first supporting layer. The first protection layer has a first thickness in the stress concentration region, the first protection layer has a second thickness in the stress dispersion region, and the second thickness is smaller than the first thickness. The stress concentration is effectively dispersed through the stress dispersing area with smaller thickness, so that stress concentration is prevented from being accumulated at the junction position of the display panel and the first supporting layer, and the occurrence probability of dead fold phenomenon at the position of the bending starting point is reduced fundamentally.

Inventors

  • ZHANG GUANGKUN

Assignees

  • 武汉华星光电半导体显示技术有限公司

Dates

Publication Date
20260505
Application Date
20260325

Claims (10)

  1. 1. A display module (100), comprising: a display panel (10); The first supporting layer (20) is positioned on one side of the display panel (10), and one side edge of the first supporting layer (20) is a bending starting point (B) of the display panel (10); A first protective layer (30) located on a side of the display panel (10) facing away from the first support layer (20); Wherein the first protective layer (30) comprises a stress concentration zone (31) and a stress dispersion zone (32), wherein an orthographic projection of the edge of the first support layer (20) on the first protective layer (30) is positioned in the stress concentration zone (31), and the stress dispersion zone (32) is positioned at one side of the stress concentration zone (31) away from the first support layer (20); The first protection layer (30) has a first thickness (H1) in the stress concentration region (31), the first protection layer (30) has a second thickness (H2) in the stress dispersion region (32), and the second thickness (H2) is smaller than the first thickness (H1).
  2. 2. The display module (100) according to claim 1, wherein the display panel (10) comprises a display area (101), a bending area (102) and a binding area (103), the bending area (102) being located between the display area (101) and the binding area (103), the edge of the first support layer (20) being located at the interface of the display area (101) and the bending area (102); The stress concentration region (31) spans the display region (101) and the inflection region (102), and the stress dispersion region (32) is located at least in the inflection region (102) and is connected to the stress concentration region (31).
  3. 3. The display module (100) according to claim 2, wherein the display panel (10) is bent into an arc at the bending region (102), and the connection between the stress concentration region (31) and the stress dispersion region (32) is 1/4 of the arc.
  4. 4. A display module (100) according to claim 3, wherein the stress-dispersing region (32) is located in the bending region (102) and the binding region (103), and the second thickness (H2) is greater than or equal to 0.
  5. 5. The display module (100) of claim 4, wherein the second thickness (H2) decreases gradually from the bending region (102) to the binding region (103) when the second thickness (H2) is greater than 0.
  6. 6. The display module (100) of claim 4, wherein when the second thickness (H2) is equal to 0, the display module (100) further comprises: A second supporting layer (40) located at one side of the display panel (10) away from the first protective layer (30), the second supporting layer (40) being located at the binding region (103); the second protection layer (50) is positioned at the bending area (102) of the display panel (10) and is positioned on the surface of the display panel (10) which is not covered by the first protection layer (30), the first support layer (20) and the second support layer (40).
  7. 7. A display module (100) according to claim 3, wherein the stress-dispersing region (32) is located within the bending region (102), and the stress-dispersing region (32) ranges from 1/4 to 1/2 of the circular arc.
  8. 8. The display module (100) of claim 7, wherein the second thickness (H2) of the first protective layer (30) decreases first and then increases from 1/4 to 1/2 of the circular arc.
  9. 9. The display module (100) of claim 8, wherein the first protective layer (30) further comprises: -a stress relief zone (33), said stress relief zone (32) being located between said stress concentration zone (31) and said stress relief zone (33); Wherein the first protective layer (30) has a third thickness (H3) at the stress relief region (33), and the third thickness (H3) is greater than the second thickness (H2).
  10. 10. The display module (100) of claim 2, wherein the first thickness (H1) of the first protective layer (30) decreases in the direction from the display region (101) to the inflection region (102) within the stress concentration region (31).

Description

Display module Technical Field The application relates to the technical field of display, in particular to a display module. Background With the continuous development of display terminal technology, the screen occupation ratio of the display device is required to be increased by users. The flexible display module is usually designed to narrow the lower frame by adopting a back folding process, a bending area of the display panel is bent and attached to the back for a single time, and functional areas such as a driving end, a binding area and the like are hidden at the back of the panel, so that the visual effect of the ultra-narrow lower frame is realized, and the screen occupation ratio of equipment is improved. In order to further compress the width of the lower frame and improve the screen duty ratio, the prior art generally adopts the mode optimal design of reducing the thickness of the protective layer of the display panel and reducing the bending radius of the back bending process, but the mode can lead the stress in the bending process to be highly concentrated at the junction position of the display panel and the back supporting layer, so that the dead bending phenomenon of the edge of the supporting layer is extremely easy to be caused, the vertical bright line of the screen is further caused, and the production yield and the use reliability of the display module are seriously influenced. Disclosure of Invention The embodiment of the application provides a display module for improving the dead phenomenon of a display panel at the edge of a first supporting layer. The embodiment of the application provides a display module, which comprises a display panel, a first supporting layer, a first protection layer and a second protection layer, wherein the first supporting layer is positioned on one side of the display panel, one side edge of the first supporting layer is a bending starting point of the display panel, the first protection layer is positioned on one side of the display panel, which is away from the first supporting layer, the first protection layer comprises a stress concentration area and a stress dispersion area, orthographic projection of the edge of the first supporting layer on the first protection layer is positioned in the stress concentration area, the stress dispersion area is positioned on one side of the stress concentration area, which is away from the first supporting layer, the first protection layer has a first thickness in the stress concentration area, the first protection layer has a second thickness in the stress dispersion area, and the second thickness is smaller than the first thickness. In some embodiments, the display panel comprises a display region, a bending region and a binding region, wherein the bending region is positioned between the display region and the binding region, the edge of the first supporting layer is positioned at the junction of the display region and the bending region, the stress concentration region spans the display region and the bending region, and the stress dispersion region is at least positioned at the bending region and is connected with the stress concentration region. In some embodiments, the display panel is bent into an arc at the bending region, and the connection between the stress concentration region and the stress dispersion region is 1/4 of the arc. In some embodiments, the stress-dispersing region is located at the inflection region and the binding region, and the second thickness is greater than or equal to 0. In some embodiments, when the second thickness is greater than 0, the second thickness gradually decreases from the inflection region to the binding region. In some embodiments, when the second thickness is equal to 0, the display module further includes a second supporting layer located at a side of the display panel facing away from the first protecting layer, the second supporting layer being located at the binding region, and a second protecting layer located at a bending region of the display panel and located at a surface of the display panel not covered by the first protecting layer, the first supporting layer, and the second supporting layer. In some embodiments, the stress-dispersing region is located within the inflection region, and the stress-dispersing region ranges from 1/4 to 1/2 of the circular arc. In some embodiments, the second thickness of the first protective layer decreases and then increases from 1/4 to 1/2 of the circular arc. In some embodiments, the first protective layer further comprises a stress relief region, the stress relief region being located between the stress riser and the stress relief region, wherein the first protective layer has a third thickness at the stress relief region, and the third thickness is greater than the second thickness. In some embodiments, the first thickness of the first protective layer decreases in a direction from the display region to the inflection regio