Display module, manufacturing method thereof and electronic device

Abstract

The application discloses a display module, a manufacturing method thereof and an electronic device. The display module comprises a flexible display panel and a supporting assembly. The supporting assembly is connected to the backlight side of the flexible display panel and used for supporting the flexible display panel. The supporting assembly comprises an adhesive and a plurality of supporting pieces. The adhesive is connected to the flexible display panel. The supporting pieces are arranged on the side of the adhesive away from the flexible display panel. The adhesive comprises a plurality of arc-shaped parts. The supporting pieces are connected to the arc-shaped parts. The adhesive and the supporting pieces arranged on the supporting assembly can provide sufficient buffer space and stress release space, thereby preventing glue stacking. In addition, the plurality of arc-shaped parts arranged on the supporting assembly can increase the sliding distance when the display module is applied to sliding display.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of display, in particular to a display module, a manufacturing method thereof and an electronic device. BACKGROUND

[0002] With the continuous development of display technology, sliding display technology has gradually entered an important stage. At present, the representative of sliding display technology is a flexible screen that can be rolled up, and the folded part is wound on a rotating shaft and pulled out when a large screen is needed. After experimental testing, the flexible screen appears to have a back glue stacking phenomenon in a high temperature and high humidity environment, causing the steel sheet in the rotating shaft part to break, affecting use. SUMMARY

[0003] The present application provides a display module in one aspect, so that the support assembly of the display module can provide a stress release space. The display module includes a flexible display panel and a support assembly connected to the backlight side of the flexible display panel for supporting the flexible display panel. The support assembly includes an adhesive member and a plurality of support members. The adhesive member is connected to the flexible display panel, and the support members are arranged on the side of the adhesive member away from the flexible display panel. The adhesive member includes a plurality of arc-shaped portions, and the support members are connected to the arc-shaped portions.

[0004] In some embodiments, the arc-shaped portions protrude towards the backlight side of the flexible display panel; the support members are arranged at the arc top of the arc-shaped portions; preferably, the plurality of support members are arranged at uniform intervals; and / or the arc angles of the plurality of arc-shaped portions are the same.

[0005] In some embodiments, the adhesive member includes a first region and a second region. The first region includes a plurality of sequentially connected arc-shaped portions; preferably, the arc angles of the plurality of arc-shaped portions are the same; and / or one side of the first region is aligned with one end of the flexible display panel.

[0006] In some embodiments, the support members are arc-shaped, and the arc angle of the support members is the same as the arc angle of the arc-shaped portions fitted thereto; preferably, the arc length of the support members is smaller than the arc length of the arc-shaped portions fitted thereto; and / or the support members are steel sheets.

[0007] In some embodiments, the warping degrees of the adhesive member and the support members are both less than 1%.

[0008] In another aspect, the present application provides a method for manufacturing a display module, comprising: providing a flexible display panel, an adhesive, a plurality of support members, and a mold having an arc-shaped convex surface; imprinting the adhesive with the mold to form a plurality of arc-shaped portions; disposing the adhesive on a backlight side of the flexible display panel, with the concave surface of the arc-shaped portions in contact with the flexible display panel; imprinting each of the support members with the mold to form an arc shape; and spacing a plurality of the support members on a side of the adhesive facing away from the flexible display panel, with the concave surface of the support members in contact with the convex surface of the arc-shaped portions.

[0009] In some embodiments, the arc length of the arc-shaped convex surface of the mold is greater than the radial width of the support members; preferably, the warpage of the mold is less than 1%; further preferably, the mold has a plurality of arc-shaped convex surfaces connected in sequence and identical; further preferably, the adhesive is divided into a first region and a second region, and the plurality of arc-shaped portions are located in the first region.

[0010] In some embodiments, the distance between the midlines of adjacent arc-shaped convex surfaces of the mold is equal to the distance between the midlines of two adjacent support members.

[0011] In another aspect, the present application provides an electronic device comprising any of the above display modules.

[0012] In some embodiments, the electronic device further comprises a body and a rotating shaft, the rotating shaft is rotatably disposed on the body, the display module is disposed to be at least partially wound on the rotating shaft, and the convex surface of the plurality of support members is in contact with the rotating shaft.

[0013] The present application comprises a flexible display panel and a support assembly connected on a backlight side of the flexible display panel for supporting the flexible display panel; wherein the support assembly comprises an adhesive and a plurality of support members, and the adhesive comprises a plurality of arc-shaped portions. By disposing the adhesive and the plurality of support members on the support assembly, sufficient buffer space is provided for the support assembly, stress release space is provided, and thus, glue accumulation is prevented. In addition, by disposing the plurality of arc-shaped portions on the support assembly, the sliding distance is increased when the display module is applied to sliding display. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor, wherein:

[0015] Figure 1 FIG. 3 is a structural schematic view of a support assembly of a display module according to an embodiment of the present application;

[0016] Figure 2 FIG. 4 is another structural schematic view of a support assembly of a display module according to an embodiment of the present application;

[0017] Figure 3 FIG. 5 is a sectional schematic view of an electronic device according to an embodiment of the present application;

[0018] Figure 4 FIG. 6 is a flow chart of a manufacturing method of a display module according to an embodiment of the present application;

[0019] Figure 5 FIG. 7 is a structural schematic view of a mold according to an embodiment of the present application. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0021] It should be noted that the terms "first", "second", etc. in the following are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0022] The words on the specification are used for the purpose of describing the embodiments of the present application, but are not intended to limit the present application. It should also be noted that, unless otherwise explicitly specified and limited, if the terms "set", "connected", "connected" appear, they should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be directly connected, or indirectly connected through an intermediate medium, can be the communication between two elements inside. For those skilled in the art, the above can be specifically understood as the specific meaning in the present application.

[0023] It should be noted that the "on", "formed on" and "disposed on" in the present application can mean that one layer is directly formed or disposed on another layer, or indirectly formed or disposed on another layer, that is, there are other layers between the two layers. In this document, unless otherwise stated, the term "in the same layer" means that two layers, components, members, elements or parts can be formed by the same patterning process, and the two layers, components, members, elements or parts are generally formed of the same material. In this document, unless otherwise stated, the expression "patterning process" generally includes the steps of coating, exposing, developing, etching, stripping of photoresist, etc. The expression "one patterning process" means a process of forming a patterned layer, component, member, etc. using one mask plate.

[0024] At present, in the existing flexible display module, under high temperature and high humidity environment, the display module will appear back glue stacking phenomenon, causing the steel sheet located in the rotating shaft part to break, affecting the use.

[0025] Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 is a structural schematic view of a support assembly of a display module in an embodiment of the present application; Figure 2 is a structural schematic view of another view of a support assembly of a display module in an embodiment of the present application; Figure 3 is a cross-sectional schematic view of an electronic device in an embodiment of the present application. The embodiment of the present application provides a display module 30, which can include a flexible display panel 31 and a support assembly 32. The support assembly 32 is connected to the backlight side of the flexible display panel 31 and is used to support the flexible display panel 31. The support assembly 32 includes an adhesive member 321 and a plurality of support members 322, the adhesive member 321 is connected to the flexible display panel 31, and the support member 322 is arranged on the side of the adhesive member 321 away from the flexible display panel 31. Specifically, the adhesive member 321 includes a plurality of arc-shaped portions 3211, and the support member 322 is connected to the arc-shaped portion 3211.

[0026] In some embodiments, a single arc-shaped portion 3211 and a support member 322 constitute an arc-shaped structure 33, and a plurality of arc-shaped structures 33 are arranged along the length direction of the flexible display panel 31.

[0027] In an embodiment, the flexible display panel 31 can be a flexible organic light emitting diode (OLED) display panel. The flexible display panel 31 can also be other flexible display panels capable of displaying images, which are not limited here. The flexible display panel 31 can be rectangular or square.

[0028] It can be understood that the display module 30 is generally attached to the surface of the electronic device for displaying images. Since the display module 30 in the present application is flexible, if the display module 30 is directly arranged on the surface of the electronic device, the display module 30 will not be stable enough, so the display module 30 includes a support assembly 32 with a rigid structure to support the display module 30. In the related art, the support assembly is generally of a flat structure, and since the display module needs to be arranged in a winding manner, the support assembly will produce a phenomenon of glue accumulation during the sliding process of the display module. The length direction of the flexible display panel 31 refers to the stretching direction C1 of the display panel when it is slid open (see Figure 3 ); that is, when the display module 30 is in a flat state, the arc-shaped structures 33 are arranged along the stretching direction C1 of the display panel when it is slid open in sequence.

[0029] Optionally, a plurality of support pieces 322 can be attached to the side of the adhesive piece 321 away from the flexible display panel 31.

[0030] The present application provides the arc-shaped structure 33 in the support assembly 32, so that the adhesive piece 321 and the support piece 322 are closely combined and can release stress, the arc-shaped structure 33 increases the sliding distance and provides a stress release space to prevent glue accumulation.

[0031] Specifically, the adhesive piece 321 is a glue material with the same size as the display panel. The adhesive piece 321 can be an optical glue of different materials such as organic silicone glue, acrylic resin, unsaturated polyester, polyurethane, and epoxy resin.

[0032] The adhesive piece 321 can be divided into a first area A and a second area B. The first area A includes a plurality of arc-shaped portions 3211 connected in sequence, and the concave surface of the arc-shaped portion 3211 is in contact with the flexible display panel 31. The second area B can not include the arc-shaped portion 3211; that is, in the second area B, the adhesive piece 321 and the support piece 322 can both be of a flat structure.

[0033] Specifically, the arc-shaped portion 3211 is obtained by embossing the first area A of the adhesive piece 321 by an arc-shaped mold. After embossing, the adhesive piece 321 will produce a depression, wherein one side of the depression is a concave surface and the other side is a convex surface. The concave surface of the arc-shaped portion 3211 is closely bonded with the flexible display panel 31.

[0034] In another embodiment, the arc-shaped portions 3211 can not be connected in sequence. The arc-shaped portions 3211 can also have a certain distance therebetween.

[0035] In an embodiment, the curvature of the plurality of arc-shaped portions 3211 can be the same; and / or, one side of the first area A can be aligned with one end of the flexible display panel 31.

[0036] It can be understood that the first area A of the adhesive 321 needs to be rolled up, in order to maximize the use of the flexible display panel 31, the rolled-up part can start from one end of the flexible display panel 31, and the adhesive 321 in the first area A needs to be embossed to form the arc-shaped part 3211.

[0037] In another embodiment, one side of the first area A can not be aligned with one end of the flexible display panel 31. That is, there is a certain distance between the one side of the first area A and the one end of the flexible display panel 31, and the flexible display panel 31 between the distance does not need to be provided with the arc-shaped part 3211.

[0038] In an embodiment, the plurality of supports 322 can be uniformly spaced apart on the side of the adhesive 321 away from the flexible display panel 31; and / or, the plurality of arc-shaped parts have the same curvature. That is, the distance between the two adjacent supports 322 can be equal. The arc-shaped structure 33 is defined as a part of the adhesive 321 (i.e. a single arc-shaped part 3211) and the support 322 attached to the part. The material of the support 322 can be steel, or aluminum, iron or other suitable metal materials or alloys.

[0039] In another embodiment, the plurality of supports 322 can also be spaced apart at different distances on the side of the adhesive 321 away from the flexible display panel 31, that is, the distance between the adjacent supports 322 can also be different.

[0040] In another embodiment, the plurality of arc-shaped parts 3211 or the arc-shaped structure 33 can also have different curvatures.

[0041] The support 322 can be arc-shaped, and the curvature of the support 322 is the same as that of the arc-shaped part 3211 attached thereto. The concave side of the support 322 is attached to the convex side of the adhesive 321. The support 322 can also be embossed by the same mold to form the arc-shaped structure with the same curvature. The embossed support 322 will have a concave part, wherein the concave side is concave and the convex side is convex. The concave side of the support 322 is tightly attached to the convex side of the adhesive 321. In an embodiment, the adhesive 321 and the support 322 are embossed sequentially. That is, the adhesive 321 is embossed first, and then the support 322 is embossed.

[0042] In another embodiment, the adhesive 321 and the support 322 can be embossed together. That is, the support 322 is sequentially arranged on the adhesive 321 first, and then the adhesive 321 and the support 322 are embossed together.

[0043] In one embodiment, the arc length of the support member 322 can be less than the arc length of the arc-shaped portion 3211 attached thereto.

[0044] The warpage of the adhesive member 321 and the support member 322 is less than 1%. Specifically, warpage or warp is used to express the degree of bending of a plane in space, and is defined in numerical value as the distance between the two points in the height direction that are farthest apart from the warped plane. The warpage of an absolute plane is 0. Warpage deformation is one of the important indicators for evaluating product quality. In the existing evaluation system, the evaluation of warpage deformation is generally carried out by using the maximum warpage deformation amount or the warpage deformation amount of a specific part. When using injection molding CAE to predict the quality, the evaluation of the simulation result of warpage deformation is generally carried out directly by using the maximum warpage deformation amount, and sometimes the total average warpage deformation amount, the average warpage amount of the 10% maximum warpage deformation nodes, etc. are used as indicators for evaluating warpage deformation.

[0045] Please refer to Figure 3 , Figure 3 FIG. 1 is a sectional view of an electronic device according to an embodiment of the present application. The electronic device 100 according to the embodiment of the present application includes a body 10, a rotating shaft 20 rotatably arranged on the body 10, and a display module 30 as described above. The display module 30 is arranged to be at least partially wound on the rotating shaft 20, and the convex surfaces of the plurality of support members 322 are in contact with the rotating shaft 20.

[0046] The rotating shaft 20 can also be a fan-shaped column to reduce the weight of the rotating shaft 20, facilitate the rotation of the rotating shaft 20, and thus reduce the energy consumption of the electronic device 100.

[0047] In one embodiment, the support assembly 32 includes an adhesive member 321 and a plurality of support members 322. The adhesive member 321 is arranged on the backlight side of the flexible display panel 31. The plurality of support members 322 are uniformly and spacedly arranged on the side of the adhesive member 321 away from the flexible display panel 31. The adhesive member 321 is divided into a first area A and a second area B. The first area A has continuous and identically curved arc-shaped portions 3211. The first area A of the adhesive member 321 is arranged around the outer surface of the rotating shaft 20. The support members 322 in the second area B of the adhesive member 321 are fixedly connected with the body 10.

[0048] It can be understood that the display module 30 is attached to the surface of the body 10 by the support assembly 32. Specifically, the support members 322 are attached to one side of the flexible display panel 31 by the adhesive member 321. The support members 322 in the second area B of the adhesive member 321 can be connected with the body 10 by the glue dispensing method. In the second area B, the adhesive member 321 and the support members 322 are both flat structures, and do not need to be formed into arc-shaped structures by mold pressing.

[0049] In another embodiment, the adhesive 321 and the supports 322 in the second region B can also be embossed by the mold to form the arc-shaped structure.

[0050] The supports 322 in the first region A of the adhesive 321 can be in contact with the rotating shaft 20. That is, a part of the flexible display panel 31 is fixed on the body 10 by the supports 322. Another part of the flexible display panel 31 is wound on the rotating shaft 20 to prevent the generation of glue accumulation, which can cause damage to the supports 322.

[0051] Please refer to Figure 4 and Figure 5 , Figure 4 is a flow chart of a manufacturing method of a display module in an embodiment of the present application; Figure 5 is a structural schematic diagram of a mold in an embodiment of the present application. The embodiment of the present application provides a manufacturing method of a display module, which can include the following steps:

[0052] Step S101: providing a flexible display panel 31, an adhesive 321, a plurality of supports 322, and a mold 323 with an arc-shaped convex surface.

[0053] Specifically, the flexible display panel 31, the adhesive 321, and the plurality of supports 322 are sequentially connected, and the adhesive 321 is used to fix the supports 322. The plurality of supports 322 are arranged at uniform intervals on a side of the adhesive 321 away from the flexible display panel 31. The mold 323 with the arc-shaped convex surface is a mold 323 with a plurality of continuous and identical arc-shaped structures.

[0054] Step S102: embossing the adhesive 321 by the mold 323 to form a plurality of arc-shaped portions 3211.

[0055] The embossing is a forming method in which a plate is placed between upper and lower molds, the material thickness of the plate is changed under the action of pressure, and the extruded material is filled in the convex and concave parts of the mold 323 with the undulating lines, so as to obtain a workpiece with undulating protrusions and characters or patterns on the surface.

[0056] In the embodiment, the mold 323 does not have special characters or patterns, and the difference from the normal embossing is that the purpose of the present application is to make the adhesive 321 have the continuous arc-shaped portions 3211, instead of printing characters or patterns on the adhesive 321.

[0057] Specifically, the shape of the adhesive 321 can be rectangular or square, which is not limited here. The adhesive 321 can be an optical adhesive of different materials such as silicone glue, acrylic resin, unsaturated polyester, polyurethane, and epoxy resin. In this embodiment, the display module 30 is partially arranged on the rotating shaft 20, and the length direction of the adhesive 321 refers to the direction of the movement of the rotating shaft 20 when the rotating shaft 20 rotates to gradually open the display module 30.

[0058] Step S103: The adhesive 321 is arranged on the backlight side of the flexible display panel 31, and the concave surface of the arc-shaped part 3211 is in contact with the flexible display panel 31.

[0059] Specifically, after the mold 323 embosses the adhesive 321 to form the arc-shaped part 3211, the arc-shaped part 3211 of the adhesive 321 has a concave surface and a convex surface, and one side of the concave surface of the adhesive 321 is attached to one side of the flexible display panel 31.

[0060] Step S104: The mold 323 embosses each support 322 to form an arc shape.

[0061] Step S105: The plurality of supports 322 are arranged at intervals on the side of the adhesive 321 away from the display panel, and the concave surface of the support 322 is in contact with the convex surface of the adhesive 321.

[0062] Specifically, after the mold 323 embosses the support 322 to form an arc-shaped structure, the arc-shaped structure of the support 322 has a concave surface and a convex surface, the concave surface of the support 322 is in contact with the convex surface of the adhesive 321, and the convex surface of the support 322 is in contact with the surface of the rotating shaft 20.

[0063] In an embodiment, the arc length πR2 of the arc-shaped convex surface of the mold 323 is greater than the radial width R1 of the support 322. The warping degree of the mold 323 is less than 1%. Further, the mold 323 has a plurality of arc-shaped convex surfaces that are sequentially connected and identical. The adhesive 321 is divided into a first region A and a second region B, and the plurality of arc-shaped parts 3211 are located in the first region A. The distance L1 between the center lines of two adjacent supports 322 is equal to the distance L2 between the center lines of two adjacent arc-shaped convex surfaces of the mold 323. The distance L1 between the center lines of two adjacent supports 322 can be adjusted according to the amount of slippage to ensure that the adhesive material has sufficient buffer space.

[0064] The application comprises a flexible display panel 31 and a support assembly 32 connected at the backlight side of the flexible display panel 31 for supporting the flexible display panel 31; wherein the support assembly 32 comprises an adhesive piece 321 and a plurality of support pieces 322, and the adhesive piece 321 comprises a plurality of arc-shaped portions 3211. By arranging the adhesive piece 321 and the plurality of support pieces 322 on the support assembly, the support assembly 32 can have sufficient buffer space, provide stress release space, and thus prevent glue stacking; in addition, by arranging the plurality of arc-shaped portions 3211 on the support assembly 32, the sliding distance can be increased when the display module 30 is applied to sliding display.

[0065] In the description of the present specification, the description of the terms "one embodiment", "another embodiment", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0066] The above is only the embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display module, comprising a flexible display panel and a support assembly, wherein the support assembly is connected to the backlight side of the flexible display panel for supporting the flexible display panel; characterized in that, The support assembly includes an adhesive component and multiple support components. The adhesive component is connected to the flexible display panel, and the support components are disposed on the side of the adhesive component opposite to the flexible display panel. The adhesive component includes multiple arc-shaped portions, and the support component is connected to the arc-shaped portions. The arc-shaped portions protrude towards the backlight side of the flexible display panel. The support component is disposed at the apex of the arc-shaped portions. The adhesive component includes a first region and a second region. The first region includes multiple arc-shaped portions connected in sequence. The first region is the region that needs to be wound. In the second region, both the adhesive component and the support component are flat structures.

2. The display module according to claim 1, characterized in that, The plurality of support members are arranged at uniform intervals; and / or, the curvature of the plurality of arcuate portions is the same.

3. The display module according to claim 1, characterized in that, The arcuate portions have the same curvature; and / or, one side of the first region is aligned with one end of the flexible display panel.

4. The display module according to claim 1, characterized in that, The support member is arc-shaped, and the arc of the support member is the same as the arc of the arc-shaped part that it fits with.

5. The display module according to claim 4, characterized in that, The arc length of the support member is less than the arc length of the arc-shaped portion it fits with; and / or, the support member is a steel sheet.

6. The display module according to any one of claims 1-5, characterized in that, The warpage of both the adhesive and the support is less than 1%.

7. A method for manufacturing a display module, characterized in that, include: We provide flexible display panels, adhesives, multiple support components, and molds with curved convex surfaces; The adhesive part is pressed using the mold to form multiple arc-shaped portions; The adhesive is disposed on the backlight side of the flexible display panel, and the concave surface of the arc-shaped portion is in contact with the flexible display panel. The mold is used to press each of the support components into an arc shape; Multiple support members are spaced apart on the side of the adhesive member away from the flexible display panel, and the concave surface of the support member is in contact with the convex surface of the arc-shaped portion. The adhesive is divided into a first region and a second region. The plurality of arc-shaped portions are located in the first region, which is the region that needs to be wound. In the second region, both the adhesive and the support are flat structures.

8. The method for manufacturing a display module according to claim 7, characterized in that, The arc length of the arc-shaped convex surface of the mold is greater than the diameter of the support member.

9. The method for manufacturing a display module according to claim 7, characterized in that, The warpage of the mold is less than 1%.

10. The method for manufacturing a display module according to claim 7, characterized in that, The mold has multiple identical arc-shaped convex surfaces connected in sequence.

11. The method for manufacturing a display module according to any one of claims 7 to 10, characterized in that, The distance between the centerlines of adjacent arcuate convex surfaces of the mold is equal to the distance between the centerlines of two adjacent support members.

12. An electronic device, characterized in that, The display module includes any one of claims 1-6.

13. The electronic device according to claim 12, characterized in that, It also includes a body and a rotating shaft, the rotating shaft being rotatably mounted on the body, the display module being configured to be at least partially wound around the rotating shaft, and the convex surfaces of the plurality of support members contacting the rotating shaft.

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