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CN-116798317-B - Folding display module, manufacturing method and display device

CN116798317BCN 116798317 BCN116798317 BCN 116798317BCN-116798317-B

Abstract

The embodiment of the application provides a folding display module, a manufacturing method and a display device. The folding display module comprises a display panel and a first adhesive layer, wherein the first adhesive layer is positioned on the light emitting side of the display panel and/or the first adhesive layer is positioned on the backlight side of the display panel. The first adhesive layer comprises a first part and a plurality of second parts, wherein the first part is adjacent to the second part, and the modulus of the second part is larger than that of the first part. The application aims to solve the problems that the surface of the folding screen is easy to scratch and the like in the using process.

Inventors

  • XIAO CHUANFU
  • LI JUNXIN
  • JIN JIAN

Assignees

  • 上海天马微电子有限公司

Dates

Publication Date
20260505
Application Date
20230626

Claims (15)

  1. 1. A foldable display module, comprising: A display panel; The first adhesive layer is positioned on the light emitting side of the display panel and/or positioned on the backlight side of the display panel; The first adhesive layer comprises a first part and a plurality of second parts, wherein the first part is adjacent to the second part, and the modulus of the second part is larger than that of the first part; The first adhesive layer comprises optical adhesive and a plurality of micro particles doped in the optical adhesive, and at least part of the micro particles in the second part are crosslinked with the optical adhesive; The volume of the micro particles in a first temperature range is smaller than the volume of the micro particles in a second temperature range, and the upper limit value of the first temperature range is smaller than the lower limit value of the second temperature range.
  2. 2. The foldable display module of claim 1, wherein at least a portion of the microparticles in the first portion are not crosslinked with the optical adhesive, and wherein the density of microparticles in the second portion that are crosslinked with the optical adhesive is greater than the density of microparticles in the first portion that are crosslinked with the optical adhesive.
  3. 3. The foldable display module of claim 2, wherein the microparticles have a particle size of 10-200nm.
  4. 4. The foldable display module of claim 2, wherein the concentration of the microparticles in the second portion is greater than the concentration of the microparticles in the first portion.
  5. 5. The foldable display module of claim 1, wherein the foldable display module comprises a bending region and a non-bending region, at least a portion of the second portions of the plurality of second portions being located in the non-bending region.
  6. 6. The foldable display module of claim 1, wherein the foldable display module comprises a bending region and a non-bending region, at least a portion of the second portions of the plurality of second portions being located in the bending region.
  7. 7. The foldable display module of claim 5 or 6, wherein the plurality of second portions includes a plurality of first sub-portions and a plurality of second sub-portions, the first sub-portions having an area greater than an area of the second sub-portions.
  8. 8. The foldable display module of claim 7, wherein a portion of the first sub-portion is located in the non-bending region and a portion of the first sub-portion is located in the bending region.
  9. 9. The foldable display module of claim 7, wherein the bending region comprises a first edge region and a first middle region, the first edge region being located at a side of the first middle region near the frame region of the foldable display module; the non-bending area comprises a second edge area and a second middle area, and the second edge area is positioned at one side of the second middle area, which is close to the frame area of the folding display module; Wherein at least part of the first sub-portions of the plurality of first sub-portions are located in the first edge region and/or at least part of the first sub-portions of the plurality of first sub-portions are located in the second edge region.
  10. 10. The foldable display module of claim 7, wherein the projected shape of the first sub-portion is dissimilar to the projected shape of the second sub-portion along a direction perpendicular to the plane of the display panel.
  11. 11. The foldable display module of claim 1, wherein the foldable display module comprises a plurality of the first adhesive layers, the plurality of the first adhesive layers comprise a first sub-adhesive layer and a second sub-adhesive layer, the first sub-adhesive layer and the second sub-adhesive layer are positioned on different film layers, and the area of the first portion in the first sub-adhesive layer is different from the area of the first portion in the second sub-adhesive layer.
  12. 12. The foldable display module of claim 1, wherein the foldable display module comprises a polarizer located on the light-emitting side of the display panel, wherein one side of the polarizer facing away from the display panel is bonded to the first adhesive layer, and the sum of the areas of all the second portions of the first adhesive layer is The area of the first adhesive layer is , wherein, 。
  13. 13. The foldable display module of claim 1, wherein the display panel comprises a polymer film on the light-emitting side of the display panel, wherein the polymer film is bonded to the first adhesive layer on the side facing the display panel, and the sum of the areas of all the second portions of the first adhesive layer is The area of the first adhesive layer is , wherein, 。
  14. 14. A method for making a foldable display module according to any one of claims 1-13, comprising the steps of: Attaching an initial adhesive layer to a corresponding film layer in the folding display module, wherein the initial adhesive layer comprises a target area; aligning the target area with the hollowed-out part on the light shielding plate; And enabling light rays of an irradiation light source to penetrate through the hollowed-out part of the light shielding plate to irradiate a target area of the initial adhesive layer, so that the initial adhesive layer is subjected to chemical reaction in the target area to generate the second part.
  15. 15. A display device comprising a foldable display module according to any one of claims 1-13.

Description

Folding display module, manufacturing method and display device [ Field of technology ] The application relates to the technical field of display, in particular to a folding display module, a manufacturing method and a display device. [ Background Art ] The folding screen is a branch of the flexible screen and has the advantages of small volume, large display screen and the like. However, the existing folding screen has the problems that scratches are easy to occur on the surface, bubbles are easy to occur at the edge positions, and degumming is easy to occur between partial film layers inside the folding screen at the folding position in the using process. [ Invention ] Therefore, the embodiment of the application provides a folding display module to solve the problem that scratches are easy to occur in the surface of a folding screen in the using process. In a first aspect, an embodiment of the present application provides a foldable display module, where the foldable display module includes a display panel and a first adhesive layer, where the first adhesive layer is located on a light emitting side of the display panel and/or the first adhesive layer is located on a backlight side of the display panel. The first adhesive layer comprises a first part and a plurality of second parts, wherein the first part is adjacent to the second part, and the modulus of the second part is larger than that of the first part. In one embodiment of the first aspect, the first glue layer comprises an optical glue and a plurality of microparticles doped in the optical glue, at least part of the microparticles in the second portion being crosslinked with the optical glue. At least some of the microparticles in the first portion are not crosslinked with the optical cement. The density of microparticles in the second portion that are crosslinked with the optical cement is greater than the density of microparticles in the first portion that are crosslinked with the optical cement. In one embodiment of the first aspect, the volume of the microparticles at the first temperature range is less than the volume of the microparticles at the second temperature range. In one embodiment of the first aspect, the microparticles have a particle size of 10 to 200nm. In one embodiment of the first aspect, the concentration of the microparticles in the second portion is greater than the concentration of the microparticles in the first portion. In an embodiment of the first aspect, the foldable display module includes a bending region and a non-bending region, and at least a portion of the plurality of second portions are located in the non-bending region. In an embodiment of the first aspect, the foldable display module includes a bending region and a non-bending region, and at least a portion of the plurality of second portions are located in the bending region. In an embodiment of the first aspect, the plurality of second portions comprises a plurality of first sub-portions and a plurality of second sub-portions, the first sub-portions having an area larger than an area of the second sub-portions. In one embodiment of the first aspect, a portion of the first sub-portion is located in the non-inflection region and a portion of the first sub-portion is located in the inflection region. In an embodiment of the first aspect, the bending area includes a first edge area and a first middle area, and the first edge area is located at a side of the first middle area near the frame area of the folding display module. The non-bending area comprises a second edge area and a second middle area, and the second edge area is positioned at one side of the second middle area, which is close to the frame area of the folding display module. Wherein at least part of the first sub-portions of the plurality of first sub-portions are located in the first edge region and/or at least part of the first sub-portions of the plurality of first sub-portions are located in the second edge region. In an embodiment of the first aspect, the projected shape of the first sub-portion is dissimilar to the projected shape of the second sub-portion in a direction perpendicular to the plane of the display panel. In an embodiment of the first aspect, the folding display module includes a plurality of first adhesive layers, the plurality of first adhesive layers includes a first sub-adhesive layer and a second sub-adhesive layer, the first sub-adhesive layer and the second sub-adhesive layer are located on different film layers, and an area of the first portion in the first sub-adhesive layer is different from an area of the first portion in the second sub-adhesive layer. In one embodiment of the first aspect, the folded display module includes a polarizer located on a light emitting side of the display panel. One side of the polaroid, which is away from the display panel, is attached to the first adhesive layer. The sum of the areas of all the second portions in the first glue layer i