Display module, manufacturing method thereof, and display device

Patent metadata

Field	Value
Publication number	US-12512020-B2
Application number	US-202117312415-A
Country	US
Kind code	B2
Filing date	Apr 26, 2021
Priority date	Apr 13, 2021
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

Embodiments of the application discloses a display module, a manufacturing method thereof, and a display device, wherein the display module includes a display panel, a functional layer, and a sealant layer disposed on the display panel, the sealant layer includes a first sealant section spaced apart from the functional layer and a second sealant section filled between the first sealant section and the functional layer, and an elastic modulus of the second sealant section is smaller than an elastic modulus of the first sealant section.

First claim

What is claimed is:

1 . A display module, comprising:
a display panel comprising a display area, a non-display area adjacent to the display area, a display functional portion located in the display area, and a bent wiring portion located in the non-display area; a functional layer disposed on the display panel; and a sealant layer disposed on the bent wiring portion and located in the non-display area, wherein the sealant layer comprises a first sealant section spaced apart from the functional layer and a second sealant section filled between the first sealant section and the functional layer, and wherein two ends of the second sealant section are bonded to the functional layer and the first sealant section respectively, an elastic modulus of the second sealant section is less than or equal to 80% of an elastic modulus of the first sealant section, and a distance between the functional layer and the first sealant section is larger than 0 and less than or equal to 0.5 mm.

2 . The display module according to claim 1 , wherein the first sealant section and the second sealant section are made of same material, the first sealant section and the second sealant section are an integral structure, and a curing rate of the second sealant section is slower than a curing rate of the first sealant section.

3 . The display module according to claim 1 , wherein a material of the second sealant section is different from a material of the first sealant section, and an elastic modulus of the material of the second sealant section is smaller than an elastic modulus of the material of the first sealant section.

4 . The display module according to claim 3 , wherein one end of the second sealant section is bonded to the functional layer, and another end of the second sealant section extends to the first sealant section and at least partially covers the first sealant section.

5 . The display module according to claim 1 , wherein the bent wiring portion comprises a first wiring section adjacent to the display functional portion, a bent wiring section disposed at one end of the first wiring section away from the display functional portion, and a second wiring section disposed at one end of the bent wiring section away from the first wiring section; and the first sealant section is disposed on the bent wiring section and covers the bent wiring section.

6 . The display module according to claim 5 , wherein the display module further comprises a backplane disposed on a side of the display panel away from the sealant layer, the backplane comprises a first backplane and a second backplane, an interval section corresponding to a position of the bent wiring section is provided between the first backplane and the second backplane, and a length of the interval section is less than or equal to a length of the bent wiring section.

7 . The display module according to claim 1 , wherein the display functional portion comprises at least one bent display section, and the elastic modulus of the second sealant section is less than or equal to 60% of the elastic modulus of the first sealant section.

8 . A method of manufacturing a display module, comprising the following steps:
providing a display panel, wherein the display panel comprises a display area, a non-display area adjacent to the display area, a display functional portion located in the display area, and a bent wiring portion located in the non-display area; forming a functional layer on the display panel; and forming a sealant layer on the display panel in the non-display area, wherein the sealant layer comprises a first sealant section spaced apart from the functional layer and a second sealant section filled between the first sealant section and the functional layer, and wherein two ends of the second sealant section are bonded to the functional layer and the first sealant section respectively, an elastic modulus of the second sealant section is less than or equal to 80% of an elastic modulus of the first sealant section, and a distance between the functional layer and the first sealant section is larger than 0 and less than or equal to 0.5 mm.

9 . The method of manufacturing the display module according to claim 8 , wherein the step of forming the sealant layer on the display panel in the non-display area comprises:
forming a photosensitive adhesive layer on the display panel in the non-display area and in contact with the functional layer; and performing a light curing step to cure the photosensitive adhesive layer to form the sealant layer, wherein the photosensitive adhesive layer comprises a first sub-adhesive spaced apart from the functional layer and a second sub-adhesive located between the first sub-adhesive and the functional layer, a light irradiation duration of the second sub-adhesive is less than a light irradiation duration of the first sub-adhesive, so that the elastic modulus of the second sealant section formed by curing the second sub-adhesive is smaller than the elastic modulus of the first sealant section formed by curing the first sub-adhesive.

10 . The method of manufacturing the display module according to claim 8 , wherein the step of forming the sealant layer on the display panel in the non-display area comprises:
forming a first photosensitive adhesive layer on the display panel in the non-display area and spaced apart from the functional layer, and curing the first photosensitive adhesive layer by a first curing step to form the first sealant section; and forming a second photosensitive adhesive layer on the display panel in the non-display area and filled between the first sealant section and the functional layer, and curing the second photosensitive adhesive by a second curing step to form the second sealant section, so that the sealant layer comprising the first sealant section and the second sealant section is obtained, wherein a curing agent in the second photosensitive adhesive layer has a larger proportion than a curing agent in the first photosensitive adhesive layer.

11 . A display device, comprising:
a display panel comprising a display area, a non-display area adjacent to the display area, a display functional portion located in the display area, and a bent wiring portion located in the non-display area; a functional layer disposed on the display panel; and a sealant layer disposed on the bent wiring portion and located in the non-display area, wherein the sealant layer comprises a first sealant section spaced apart from the functional layer and a second sealant section filled between the first sealant section and the functional layer, and wherein two ends of the second sealant section are bonded to the functional layer and the first sealant section respectively, an elastic modulus of the second sealant section is less than or equal to 80% of an elastic modulus of the first sealant section, and a distance between the functional layer and the first sealant section is larger than 0 and less than or equal to 0.5 mm.

12 . The display device according to claim 11 , wherein the first sealant section and the second sealant section are made of same material, the first sealant section and the second sealant section are an integral structure, and a curing rate of the second sealant section is slower than a curing rate of the first sealant section.

13 . The display device according to claim 11 , wherein a material of the second sealant section is different from a material of the first sealant section, and an elastic modulus of the material of the second sealant section is smaller than an elastic modulus of the material of the first sealant section.

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Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Yang Jun
• You Kuihua
• Tang Chihshun

Classifications

• B32B7/05

  the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection (using interposed adhesives or bonding materials applied in spaced arrangements B32B7/14) · CPC title

• B32B2037/1253

  curable adhesive · CPC title

• B32B2307/51

  Elastic · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• B32B7/022

  Mechanical properties · CPC title