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CN-122003060-A - Support film and display device

CN122003060ACN 122003060 ACN122003060 ACN 122003060ACN-122003060-A

Abstract

The embodiment of the application provides a supporting film and a display device, which relate to the technical field of supporting films, wherein the supporting film comprises a plurality of supporting film layers which are arranged in a laminated way, and the supporting film layers are arranged along the thickness direction of the supporting film layers, and each supporting film layer is provided with a through hole, and orthographic projections of the through holes of adjacent supporting film layers on the surface where the supporting film is positioned are at least partially overlapped. According to the application, the support film is arranged to comprise a plurality of support film layers which are arranged in a stacked manner, and the orthographic projections of the through holes of the adjacent support film layers on the surface of the support film are at least partially overlapped, so that the symmetry of the overall design of the support film and the uniformity of the stress applied to the support film can be increased, and the overall stretching rate and stability of the support film can be improved.

Inventors

  • LUO ZONGWEI

Assignees

  • 昆山国显光电有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (10)

  1. 1. The support film is characterized by comprising a plurality of support film layers which are arranged in a stacked mode, through holes are formed in each support film layer along the thickness direction of the support film layers, and orthographic projections of the through holes of adjacent support film layers on the surface where the support film is located are at least partially overlapped.
  2. 2. The support film according to claim 1, wherein the multi-layer support film comprises a first support film layer and a second support film layer which are stacked, wherein a first through hole is formed in the first support film layer, and a second through hole is formed in the second support film layer; Preferably, the thickness of the first support film layer ranges from 15 μm to 25 μm along the direction perpendicular to the first support film layer; Preferably, the thickness of the second support film layer ranges from 15 μm to 25 μm in a direction perpendicular to the second support film layer; preferably, the thickness of the first support film layer is equal to the thickness of the second support film layer; preferably, the material of the first support film layer comprises a thermoplastic polyurethane elastomer; preferably, the material of the second support film layer comprises a thermoplastic polyurethane elastomer.
  3. 3. The support film according to claim 2, wherein the multi-layer support film further comprises a third support film layer laminated between the first support film layer and the second support film layer, wherein a third through hole is formed in the third support film layer, and the orthographic projection of the third through hole on the surface of the support film is at least partially overlapped with the orthographic projection of the second through hole and/or the first through hole on the surface of the support film; preferably, the center of orthographic projection of the first through hole on the surface of the support film coincides with the center of orthographic projection of the third through hole on the surface of the support film; preferably, the center of the orthographic projection of the second through hole on the surface of the support film coincides with the center of the orthographic projection of the third through hole on the surface of the support film; Preferably, the thickness of the third support film layer ranges from 10 μm to 15 μm in a direction perpendicular to the third support film layer; Preferably, the thickness of the third support film layer is smaller than the thickness of the second support film layer and/or the first support film layer; Preferably, the material of the third support film layer includes a thermoplastic polyurethane elastomer.
  4. 4. A support membrane according to claim 3, wherein the third through-hole has a size smaller than the size of the second through-hole and/or the first through-hole in a first direction; preferably, the size of the third through hole is larger than the size of the second through hole and/or the first through hole along a second direction, and the second direction intersects with the first direction; preferably, the second direction is perpendicular to the first direction.
  5. 5. The support film of claim 3 or 4, wherein orthographic projections of the first through hole, the second through hole and the third through hole on a surface of the support film each comprise a straight line segment and/or a curved line segment; preferably, orthographic projections of the first through hole, the second through hole and the third through hole on the surface of the support film are rectangular; Preferably, the dimension of the orthographic projection of the first through hole on the surface of the support film along the first direction is in the range of 3000 μm to 7000 μm; Preferably, the dimension of the orthographic projection of the second through hole on the surface of the support film along the first direction is in the range of 3000 μm to 7000 μm; preferably, in the second direction, the dimension of the orthographic projection of the first through hole on the surface of the support film ranges from 1000 μm to 2000 μm; preferably, the dimension of the orthographic projection of the second through hole on the surface of the support film along the second direction is in the range of 1000 μm to 2000 μm.
  6. 6. The support film of claim 5, wherein the orthographic projections of the first through hole and the second through hole on the surface of the support film are all round; preferably, the orthographic projection of the third through hole on the surface of the support film is elliptical; Preferably, the diameter of the orthographic projection of the first through hole on the surface of the support film ranges from 2000 μm to 5000 μm; preferably, the diameter of the orthographic projection of the second through hole on the surface of the support film ranges from 2000 μm to 5000 μm; Preferably, the dimension of the orthographic projection of the third through hole on the surface of the support film along the first direction is in the range of 1000 μm to 2000 μm; Preferably, in the second direction, the dimension of the orthographic projection of the third through hole on the surface of the support film is in the range of 3000 μm to 7000 μm; Preferably, the orthographic projection of the first through hole on the surface of the support film overlaps with the orthographic projection of the second through hole on the surface of the support film.
  7. 7. The support film according to claim 3 or 4, wherein the number of the first through holes is plural; preferably, the maximum distance between orthographic projections of adjacent first through holes on the surface of the support film is 1000-3000 μm; Preferably, the number of the second through holes is a plurality; preferably, the maximum distance between the orthographic projections of the adjacent second through holes on the surface of the support film is 1000-3000 μm; Preferably, the number of the third through holes is a plurality; preferably, the maximum distance between orthographic projections of adjacent third through holes on the surface of the support film is 1000-3000 μm.
  8. 8. The support film of claim 3 or 4, further comprising a first adhesive layer between the first support film layer and the third support film layer; Preferably, the support film further comprises a second adhesive layer between the third support film layer and the second support film layer; Preferably, at least part of the first adhesive layer extends into the first through hole; preferably, at least part of the second adhesive layer extends through the third through hole to be in contact with the first adhesive layer.
  9. 9. The support film of claim 8, wherein the first adhesive layer has a thickness in the range of 3 μm to 6 μm in a direction perpendicular to the first adhesive layer; Preferably, the thickness of the second adhesive layer ranges from 3 μm to 6 μm in a direction perpendicular to the second adhesive layer; preferably, the thickness of the first adhesive layer is equal to the thickness of the second adhesive layer; Preferably, the material of the first adhesive layer includes a pressure sensitive adhesive; preferably, the material of the second adhesive layer includes a pressure sensitive adhesive.
  10. 10. A display device comprising a display module and the support film of any one of claims 1-9, the support film being disposed on a back side of the display module.

Description

Support film and display device Technical Field The application relates to the technical field of support films, in particular to a support film and a display device. Background Organic LIGHT EMITTING Diode (OLED) and flat display devices based on light emitting Diode (LIGHT EMITTING Diode) technology have advantages of high image quality, power saving, thin body, wide application range, etc., and are widely used in various consumer electronic products such as mobile phones, televisions, notebook computers, desktop computers, etc., and become the mainstream in stretchable display modules, and the back side of the stretchable display module is provided with a stretchable support film. However, there are still some problems with stretchable support films that need to be addressed. Disclosure of Invention In order to overcome the technical problems mentioned in the background of the technology, the embodiment of the application provides a support film, which comprises a plurality of support film layers which are arranged in a stacked manner, wherein through holes are formed in each support film layer along the thickness direction of the support film layers, and orthographic projections of the through holes of adjacent support film layers on the surface of the support film are at least partially overlapped. In some possible embodiments, the multi-layer support film layer comprises a first support film layer and a second support film layer which are stacked, wherein a first through hole is formed in the first support film layer, and a second through hole is formed in the second support film layer; Preferably, the thickness of the first support film layer ranges from 15 μm to 25 μm along the direction perpendicular to the first support film layer; Preferably, the thickness of the second support film layer ranges from 15 μm to 25 μm in a direction perpendicular to the second support film layer; preferably, the thickness of the first support film layer is equal to the thickness of the second support film layer; preferably, the material of the first support film layer comprises a thermoplastic polyurethane elastomer; preferably, the material of the second support film layer comprises a thermoplastic polyurethane elastomer. In some possible embodiments, the multi-layer support film layer further comprises a third support film layer which is laminated between the first support film layer and the second support film layer, wherein a third through hole is formed in the third support film layer, and the orthographic projection of the third through hole on the surface of the support film is at least partially overlapped with the orthographic projection of the second through hole and/or the first through hole on the surface of the support film; preferably, the center of orthographic projection of the first through hole on the surface of the support film coincides with the center of orthographic projection of the third through hole on the surface of the support film; preferably, the center of the orthographic projection of the second through hole on the surface of the support film coincides with the center of the orthographic projection of the third through hole on the surface of the support film; Preferably, the thickness of the third support film layer ranges from 10 μm to 15 μm in a direction perpendicular to the third support film layer; Preferably, the thickness of the third support film layer is smaller than the thickness of the second support film layer and/or the first support film layer; Preferably, the material of the third support film layer includes a thermoplastic polyurethane elastomer. In some possible embodiments, the third through hole has a size smaller than the size of the second through hole and/or the first through hole in the first direction; preferably, the size of the third through hole is larger than the size of the second through hole and/or the first through hole along a second direction, and the second direction intersects with the first direction; preferably, the second direction is perpendicular to the first direction. In some possible embodiments, orthographic projections of the first through hole, the second through hole and the third through hole on the surface of the support film each include a straight line segment and/or a curved line segment; preferably, orthographic projections of the first through hole, the second through hole and the third through hole on the surface of the support film are rectangular; Preferably, the dimension of the orthographic projection of the first through hole on the surface of the support film along the first direction is in the range of 3000 μm to 7000 μm; Preferably, the dimension of the orthographic projection of the second through hole on the surface of the support film along the first direction is in the range of 3000 μm to 7000 μm; preferably, in the second direction, the dimension of the orthographic projection of the first through hole on the surface