Display module, assembling method of display module and display device

Abstract

The invention provides a display module, an assembling method of the display module and a display device.The display module comprises a display panel, the display panel comprises a first plane part, a bending part and a second plane part which are connected in sequence, the first plane part is arranged in a display area of the display module, the bending part is arranged in a bending area of the display module, and the second plane part is arranged in a display area of the display module; the second plane part is arranged on a non-display surface of the display module; the buffer layer is located between the first plane part and the second plane part, the buffer layer comprises a first sub-functional layer, the first sub-functional layer comprises a first part and a second part, the first part is at least located in the display area, the second part is at least located in the bending area, and at least part of the outer surface, away from the first part, of the second part is arranged to be an outward convex surface; the first adhesive layer is at least located in the bending area, and the first adhesive layer is located between the second part and the bending part. According to the technical scheme, bubble filling can be avoided.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module, an assembly method of a display module, and a display device. Background Art

[0002] With the development of display technology, users have more and more requirements for screen-to-body ratio. In order to further increase the screen-to-body ratio, the binding area is usually bent to the back of the display screen to achieve a narrow frame, forming a semicircular bending area after bending. Due to the bending stress in the bending area, cracks and other defects are prone to occur in the bending area line. In addition, in order to further increase the screen-to-body ratio, the bending radius is getting smaller and smaller, which may pose a reliability risk. Summary of the invention

[0003] In order to solve the above problems, embodiments of the present application provide a display module, an assembly method of a display module, and a display device.

[0004] In a first aspect, an embodiment of the present application provides a display module, comprising: a display panel, comprising a first planar portion, a bending portion, and a second planar portion connected in sequence, the first planar portion being arranged in a display area of ​​the display module, the bending portion being arranged in a bending area of ​​the display module, and the second planar portion being arranged in a non-display surface of the display module; a buffer layer being located between the first planar portion and the second planar portion, the buffer layer comprising a first sub-functional layer, the first sub-functional layer comprising a first part and a second part, the first part being at least located in the display area, the second part being at least located in the bending area, and at least part of the outer surface of the second part facing away from the first part being arranged to be an outer convex surface; a first adhesive layer being located at least in the bending area, the first adhesive layer being located between the second part and the bending portion.

[0005] In combination with the first aspect, the cross-section of the second part in the first direction includes at least one of a semicircle, a semi-ellipse, a gradient semicircle, or a polygon, wherein the first direction is perpendicular to the direction of the first planar portion; preferably, the cross-section of the second part in the first direction includes a first semicircle, and the radius of the first semicircle is greater than or equal to 0.035mm and less than or equal to 0.05mm; preferably, the cross-section of the bending portion in the first direction includes a second semicircle, and the difference between the radius of the second semicircle and the radius of the first semicircle is greater than 0.15mm; preferably, the center of the second semicircle coincides with the center of the first semicircle; preferably, the thickness of the first part is greater than or equal to 30um and less than or equal to 50um.

[0006] In combination with the first aspect, the first sub-functional layer includes a metal layer; preferably, the material of the first sub-functional layer includes at least one of copper, stainless steel, or titanium alloy; preferably, the buffer layer also includes a second sub-functional layer, and the second sub-functional layer is located between the first sub-functional layer and the first planar portion; preferably, the second sub-functional layer is located in the display area, and the distance between the end face of the second sub-functional layer close to the bending portion and the bending portion is greater than the distance between the end face of the first part close to the bending portion and the bending portion; preferably, the second sub-functional layer includes polyurethane foam, or silicone gel; preferably, the buffer layer also includes a third sub-functional layer, and the third sub-functional layer is located between the second sub-functional layer and the first planar portion; preferably, the third sub-functional layer is located in the display area, and the end face of the third sub-functional layer close to the bending portion is flush with the end face of the second sub-functional layer close to the bending portion; preferably, the third sub-functional layer includes grid glue.

[0007] In combination with the first aspect, the material of the first adhesive layer includes: at least one of: epoxy photocuring adhesive, epoxy thermosetting adhesive, acrylic photocuring adhesive, or acrylic thermosetting adhesive; preferably, the viscosity of the material of the first adhesive layer is greater than or equal to 1000cps and less than or equal to 5000cps; preferably, the thixotropy of the material of the first adhesive layer is greater than 1.5.

[0008] In combination with the first aspect, the display module also includes: a first supporting film, located between the first planar portion and the buffer layer, the first supporting film including a first end face close to the bending portion, the first end face contacting the first adhesive layer; a second supporting film, located between the second planar portion and the buffer layer, the second supporting film including a second end face close to the bending portion, the second end face contacting the first adhesive layer; preferably, a first accommodating space is formed between the first supporting film and the first sub-functional layer, and part of the first adhesive layer is located in at least part of the first accommodating space; preferably, a second accommodating space is formed between the second supporting film and the first sub-functional layer, and part of the first adhesive layer is located in at least part of the second accommodating space; preferably, the second end face is flush with the first end face; preferably, the first end face is flush with the end face of the first portion close to the bending portion.

[0009] In combination with the first aspect, the display module also includes: a cushion block located between the buffer layer and the second supporting film; preferably, the display module also includes: a second adhesive layer arranged on the side of the bending portion away from the first adhesive layer; preferably, the display module also includes a polarizing layer and a cover plate stacked in sequence on the side of the first planar portion away from the buffer layer; preferably, the display module also includes a third adhesive layer located between the polarizing layer and the cover plate.

[0010] In a second aspect, an embodiment of the present application also provides an assembly method for a display module, comprising: providing a display panel before bending, the display panel comprising a first planar portion, a portion to be bent, and a second planar portion connected in sequence; laminating a buffer layer on the non-display surface of the first planar portion, the buffer layer comprising a first sub-functional layer, the first sub-functional layer comprising a first part and a second part, the orthographic projection of the first part on the display panel at least partially overlaps with the first planar portion, the orthographic projection of the second part on the display panel at least partially overlaps with the portion to be bent, and at least part of the outer surface of the second part facing away from the first part is set to an outer convex surface; filling the portion to be bent with material of the first adhesive layer, the material of the first adhesive layer and the buffer layer are set on the same side; bending the portion to be bent to form a bent portion, and at the same time the material of the first adhesive layer is in contact with the outer convex surface.

[0011] In combination with the second aspect, the material of the first glue layer is filled on the portion to be bent, including: filling the material of the first glue layer on the portion to be bent through a dispensing process; preferably, the dispensing process includes dispensing through a piezoelectric valve or a screw valve; preferably, the non-display surface of the first planar portion is provided with a first supporting film, and the second planar portion is provided with a second supporting film, the second supporting film and the first supporting film are provided on the same side, the first supporting film includes a first end face close to the portion to be bent, the second supporting film includes a second end face close to the portion to be bent, and the material of the first glue layer is in contact with the first end face and the second end face respectively; preferably, the thickness of the material of the first glue layer is greater than the thickness of the first supporting film or the second supporting film; preferably, the material of the first glue layer is in a semi-fluid state.

[0012] In combination with the second aspect, after bending the portion to be bent to form a bending portion, the method further includes: curing the material of the first adhesive layer to obtain the first adhesive layer; preferably, the curing method includes thermal curing or UV curing; preferably, after the buffer layer is bonded to the non-display surface of the first planar portion, the method further includes: bonding a pad block to the side of the buffer layer away from the first planar portion.

[0013] In a third aspect, an embodiment of the present application further provides a display device, comprising the above-mentioned display module, or comprising a display module assembled by the above-mentioned method.

[0014] Through the above technical solution, at least part of the outer surface of the second part of the first sub-functional layer is set to an outer convex surface. During the preparation process, when the display panel is bent, the second part of the first sub-functional layer can guide or squeeze the material of the first glue layer (glue in a flowing state) to shape, thereby effectively improving the uniformity of glue filling and avoiding filling bubbles. In addition, this solution does not add a film layer structure, but directly improves the first sub-functional layer in the buffer layer, and directly forms the first part and the second part when preparing the first sub-functional layer. Therefore, the thickness of the display module will not be increased, and the material cost will not be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of a display module provided in one embodiment of the present application.

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of a display module provided in yet another embodiment of the present application.

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of a display module provided in yet another embodiment of the present application.

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of a display module provided in yet another embodiment of the present application.

[0019] Figure 5 It is a schematic diagram of the cross-sectional structure of a display module provided in yet another embodiment of the present application.

[0020] Figure 6 It is a schematic diagram of the cross-sectional structure of a display module provided in yet another embodiment of the present application.

[0021] Figure 7 It is a flowchart of an assembly method of a display module provided in one embodiment of the present application.

[0022] Figures 8a to 8e It is a structural schematic diagram of the assembly process of a display module provided by an embodiment of the present application.

[0023] Fig. 9 It is a schematic diagram of the structure of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] As the bending radius becomes smaller and smaller, the stress on the metal wiring in the bending area is also increasing. In order to avoid the metal wiring from breaking and causing a reduction in yield or reliability, glue is usually filled inside the bending area and solidified to form an internal support. However, the inventors found that the thickness of the glue after solidification is uneven, and there is even a problem of glue breaking, and the proportion of bubbles in the glue is very high, which has a poor support effect on the bending area.

[0026] In view of the above technical problems, in the first aspect, an embodiment of the present application provides a display module. The display module includes: a display panel, including a first plane portion, a bending portion, and a second plane portion connected in sequence, the first plane portion is arranged in the display area of ​​the display module, the bending portion is arranged in the bending area of ​​the display module, and the second plane portion is arranged on the non-display surface of the display module; a buffer layer, located between the first plane portion and the second plane portion, the buffer layer includes a first sub-functional layer, the first sub-functional layer includes a first part and a second part, the first part is at least located in the display area, the second part is at least located in the bending area, and at least part of the outer surface of the second part away from the first part is arranged as an outer convex surface; a first glue layer, at least located in the bending area, and the first glue layer is located between the second part and the bending portion. In the embodiment of the present application, at least part of the outer surface of the second part of the first sub-functional layer is arranged as an outer convex surface. During the preparation process, when the display panel is bent, the second part of the first sub-functional layer can guide or squeeze the material of the first glue layer (glue in a flowing state) to shape, thereby effectively improving the uniformity of glue filling and avoiding filling bubbles. In addition, this solution does not add a film layer structure, but directly improves the first sub-functional layer in the buffer layer, and directly forms the first part and the second part when preparing the first sub-functional layer. Therefore, the thickness of the display module will not be increased, and the material cost will not be increased.

[0027] Figure 1 Schematic diagram of the cross-sectional structure of a display module provided by an embodiment of the present application. Figure 1 As shown, the display module includes a display panel 100 , a buffer layer 200 and a first adhesive layer 300 .

[0028] In the embodiment of the present application, the display panel 100 is a flexible display panel. After the display panel 100 is assembled into a display module, a portion of the display panel 100 (for example, a binding area) is bent to the non-display surface of the display module to achieve a narrow frame. Figure 1 As shown, the display panel 100 includes a first planar portion 111, a bending portion 112 and a second planar portion 113 connected in sequence, the first planar portion 111 is arranged in the display area AA of the display module, the bending portion 112 is arranged in the bending area NA of the display module, and the second planar portion 113 is arranged on the non-display surface of the display module.

[0029] The buffer layer 200 is located between the first planar portion 111 and the second planar portion 113. The buffer layer 200 includes a first sub-functional layer 210, and the first sub-functional layer 210 includes a first portion 211 and a second portion 212. The first portion 211 is at least located in the display area AA, the second portion 212 is at least located in the bending area NA, and at least a portion of the outer surface of the second portion 212 away from the first portion 211 is set as an outer convex surface. Figure 1As shown, at least a portion of the outer surface of the second portion 212 away from the first portion 211 is configured as an arc surface. In this way, when bending, the material of the first adhesive layer 300 can be formed along the outer surface of the second portion 212 to avoid filling bubbles or cavities.

[0030] In an embodiment of the present application, the first sub-functional layer 210 includes a metal layer. Optionally, the material of the first sub-functional layer 210 includes at least one of copper, stainless steel, or a titanium alloy. Preferably, the material of the first sub-functional layer 210 includes copper. The first sub-functional layer 210 belongs to the film layer structure in the existing display module. This solution does not add a film layer structure, but directly improves the first sub-functional layer 210 in the buffer layer 200. When preparing the first sub-functional layer 210, the first part 211 and the second part 212 are directly formed. Therefore, the thickness of the display module will not be increased, and the material cost will not be increased.

[0031] In the embodiment of the present application, the second portion 212 is in the first direction ( Figure 1 The cross-section in the first direction (y direction) includes a first semicircle, and the radius of the first semicircle is greater than or equal to 0.035mm and less than or equal to 0.05mm. For example, the radius of the first semicircle is 0.035mm, 0.04mm, 0.045mm, 0.05mm. Optionally, the cross-section of the bending portion 112 in the first direction includes a second semicircle, and the difference between the radius of the second semicircle and the radius of the first semicircle is greater than 0.15mm. For example, the difference between the radius of the second semicircle and the radius of the first semicircle is 0.15mm, 0.155mm, 0.16mm, 0.165mm. With such a configuration, even if there is a fitting error when fitting the buffer layer 200, the second part 212 will not damage the bending portion 112. Among them, the first direction (y direction) and the direction in which the first planar portion is located (i.e. Figure 1 The x direction in the image is perpendicular to the x direction.

[0032] Optionally, the center of the second semicircle coincides with the center of the first semicircle, and when the bending portion 112 is bent, the second portion 212 can fully discharge air when in contact with the material of the first adhesive layer 300, further avoiding the generation of bubbles. In the embodiment of the present application, the thickness of the first portion 211 is greater than or equal to 30um and less than or equal to 50um. Exemplarily, the thickness of the first portion 211 is 30um, 35um, 40um, 45um, or 50um.

[0033] The first adhesive layer 300 is at least located in the bending area NA, and the first adhesive layer 300 is located between the second part 212 and the bending portion 112. In the embodiment of the present application, the material of the first adhesive layer 300 includes at least one of epoxy light-curing adhesive, epoxy heat-curing adhesive, acrylic light-curing adhesive, or acrylic heat-curing adhesive. The material of the first adhesive layer 300 is in a semi-fluid state at room temperature. Optionally, the viscosity of the material of the first adhesive layer 300 is greater than or equal to 1000cps and less than or equal to 5000cps. Exemplarily, the viscosity of the material of the first adhesive layer 300 is 1000cps, 1500cps, 2000cps, 2500cps, 3000cps, 3500cps, 4000cps, 4500cps, and 5000cps. The thixotropy of the material of the first adhesive layer 300 is greater than 1.5. Exemplarily, the thixotropy of the material of the first adhesive layer 300 is 1.5, 1.6, 1.7, 1.8, 1.9, 2. In the embodiment of the present application, the material (i.e., glue) of the first adhesive layer 300 is guided to be formed by the first sub-functional layer, and the glue only needs to have a certain viscosity and thixotropy, and high thixotropy (for example, thixotropy greater than 3) is not required to avoid filling bubbles and filling voids.

[0034] Optionally, Figure 2 FIG. 1 is a schematic diagram of a cross-sectional structure of a display module provided by another embodiment of the present application. Figure 2 As shown, the buffer layer 200 further includes a second sub-functional layer 220, which is located between the first sub-functional layer 210 and the first planar portion 111. Optionally, the second sub-functional layer 220 is located in the display area AA, and the distance between the end surface of the second sub-functional layer 220 close to the bending portion 112 and the bending portion 112 is greater than the distance between the end surface of the first portion 211 close to the bending portion 112 and the bending portion 112. That is, the second sub-functional layer 220 is retracted relative to the first portion 211. In the embodiment of the present application, the second sub-functional layer 220 includes polyurethane foam or silicone gel. Optionally, the buffer layer 200 further includes a third sub-functional layer 230, which is located between the second sub-functional layer 220 and the first planar portion 111. Optionally, the third sub-functional layer 230 is located in the display area AA, and the end surface of the third sub-functional layer 230 close to the bending portion 112 is flush with the end surface of the second sub-functional layer 220 close to the bending portion 112. That is, the third sub-functional layer 230 is also retracted relative to the first part 211, and the third sub-functional layer 230 is aligned with the second sub-functional layer 220, so that the preparation process can be simplified. Optionally, the third sub-functional layer includes a grid glue. In an embodiment of the present application, the buffer layer 200 has functions such as support, buffering, and heat dissipation. The buffer layer 200 is pre-prepared, that is, the first sub-functional layer 210, the second sub-functional layer 220, and the third sub-functional layer 230 are first assembled together to form the buffer layer 200, and then the buffer layer 200 is attached to the non-display surface of the display panel 100.

[0035] Continue to refer Figure 2 , the display module further includes a first support film 510 and a second support film 520. The first support film 510 is located between the first planar portion 111 and the buffer layer 200, and the second support film 520 is located between the second planar portion 113 and the buffer layer 200. The first support film 510 includes a first end face 511 close to the bending portion 112, and the first end face 511 is in contact with the first adhesive layer 300. The second support film 520 includes a second end face 521 close to the bending portion 112, and the second end face 521 is in contact with the first adhesive layer 300. In the embodiment of the present application, the first end face 511 and the second end face 521 are flush, that is, the first end face 511 and the second end face 521 are symmetrically arranged. Optionally, the first end face 511 is flush with the end face of the first part 211 close to the bending portion 112, that is, the first part 211, the first end face 511 and the second end face 521 are located at the boundary between the display area AA and the bending area NA.

[0036] In the embodiment of the present application, the first adhesive layer 300 is just filled in the bending area NA. In the actual preparation process, in order to ensure that the first adhesive layer 300 completely fills the gap between the bending portion 112 and the second portion 212, the amount of the first adhesive layer 300 will be too much. At this time, the first adhesive layer 300 is not only located in the bending area NA, but also overflows to the display area AA. Optionally, Figure 3 FIG. 1 is a schematic diagram of a cross-sectional structure of a display module provided by another embodiment of the present application. Figure 3 As shown, a first accommodation space B1 is formed between the first supporting film 510 and the first sub-functional layer 210, and part of the first adhesive layer 300 is located in at least part of the first accommodation space B1. A second accommodation space B2 is formed between the second supporting film 520 and the first sub-functional layer 210, and part of the first adhesive layer 300 is located in at least part of the second accommodation space B2.

[0037] Continue to refer Figure 2 , the display panel also includes a padding block 400, which is located between the buffer layer 200 and the second supporting film 520. Optionally, the padding block 400 includes a double-sided adhesive for bonding the buffer layer 200 and the second supporting film 520, and for filling the space between the buffer layer 200 and the second supporting film 520 to prevent the film layer in the display module from being suspended. Optionally, the display module also includes a second adhesive layer 600, which is arranged on the side of the bending portion 112 away from the first adhesive layer 300. That is, the second adhesive layer 600 is arranged on the outer surface of the bending portion 112. Optionally, the second adhesive layer 600 includes UV glue. UV glue has good flexibility and adhesion, and when bending, it can improve the firmness and reliability of the connection between the first adhesive layer 300 and the bending portion 112. In addition, the second adhesive layer 600 can change the stress neutral layer of the bending portion 112 to avoid the breakage of the metal routing.

[0038] Figure 42 is a schematic diagram of the cross-sectional structure of a display module provided in another embodiment of the present application. Figure 4 The display module shown is Figure 2 The difference between the display module shown is that the display module further includes a polarizing layer 700 and a cover plate 900 stacked in sequence on the side of the first planar portion 111 away from the buffer layer 200. The display module further includes a third adhesive layer 800 located between the polarizing layer 700 and the cover plate 900. Optionally, the third adhesive layer 800 includes optical adhesive.

[0039] In the embodiment of the present application, it can be understood that at least part of the outer surface of the second portion 212 facing away from the first portion 211 is set as an outer convex surface. When the display panel 100 is bent, the outer convex surface can squeeze the material (i.e., glue) of the first adhesive layer 300 to squeeze out the bubbles in the glue to avoid filling the bubbles. In addition, the first adhesive layer 300 is filled between the second portion 212 and the bending portion 112, which can provide better internal support and avoid the metal wiring from breaking.

[0040] Figure 2 FIG. 2 shows a case where the cross section of the second portion 212 in the first direction (i.e., the y direction) is a semicircular shape. In other embodiments, the cross section of the second portion 212 in the first direction (i.e., the y direction) may also be other shapes. Figure 1 The cross section in the y direction (in the middle) includes at least one of a semicircle, a semi-ellipse, a gradient semicircle, or a polygon (for example, a quadrilateral, a pentagon, a hexagon, a heptagon, an octagon, etc.). The first direction is perpendicular to the direction in which the first planar portion 111 is located. Figure 5 As shown, the second portion 212 is in the first direction ( Figure 5 The cross section in the y direction (in the y direction) includes a semi-ellipse. Figure 6 As shown, the second portion 212 is in the first direction ( Figure 6 The cross-section in the y direction (in the y direction) includes a quadrilateral (e.g., a trapezoid).

[0041] In the second aspect, the embodiment of the present application also provides an assembly method of a display module. The method includes: providing a display panel before bending, the display panel includes a first plane portion, a portion to be bent, and a second plane portion connected in sequence; attaching a buffer layer to the non-display surface of the first plane portion, the buffer layer includes a first sub-functional layer, the first sub-functional layer includes a first part and a second part, the orthographic projection of the first part on the display panel at least partially overlaps with the first plane portion, the orthographic projection of the second part on the display panel at least partially overlaps with the portion to be bent, and the second part is away from at least part of the outer surface of the first part, which is set to an outer convex surface; filling the material of the first adhesive layer on the portion to be bent, and the material of the first adhesive layer is set on the same side as the buffer layer; bending the portion to be bent to form a bending portion, and at the same time, the material of the first adhesive layer contacts the outer convex surface. In the embodiment of the present application, the outer surface of the second part of the first sub-functional layer is set to an outer convex surface, and when the portion to be bent is bent, the outer convex surface guides or squeezes the material of the first adhesive layer to discharge bubbles in the material of the first adhesive layer to avoid filling bubbles.

[0042] Figure 7 It is a flowchart of an assembly method of a display module provided in one embodiment of the present application. Figures 8a to 8e FIG. 1 is a schematic diagram of the assembly process of a display module provided by an embodiment of the present application. Figure 7 As shown, the method includes the following steps.

[0043] Step S710, providing a display panel before being bent.

[0044] like Figure 8a As shown, the display panel 100 is a display panel before being bent, and the display panel 100 includes a first plane portion 111, a portion to be bent 112a, and a second plane portion 113 connected in sequence. Optionally, a first supporting film 510 is provided on the non-display surface of the first plane portion 111, and a second supporting film 520 is provided on the second plane portion 113, and the second supporting film 520 is provided on the same side as the first supporting film 510. The first supporting film 510 includes a first end surface 511 close to the portion to be bent 112a, and the second supporting film 520 includes a second end surface 521 close to the portion to be bent 112a.

[0045] Step S720: Laminating a buffer layer on the non-display surface of the first planar portion.

[0046] Optionally, the buffer layer is attached to the non-display surface of the first planar portion. Figure 8bAs shown, the buffer layer 200 includes a first sub-functional layer 210, and the first sub-functional layer 210 includes a first part 211 and a second part 212. The orthographic projection of the first part 211 on the display panel 100 at least partially overlaps with the first planar portion 111, and the orthographic projection of the second part 212 on the display panel 100 at least partially overlaps with the portion to be bent 112a, and at least a portion of the outer surface of the second part 212 facing away from the first part 211 is set as an outer convex surface.

[0047] Optionally, after attaching the buffer layer 200, the method further comprises: attaching a heightening block 400 to a side of the buffer layer 200 away from the first plane portion 111, such as Figure 8c shown.

[0048] Step S730, filling the portion to be bent with the material of the first adhesive layer.

[0049] Optionally, the material 310 of the first glue layer is filled on the portion to be bent 112a by a glue dispensing process. Optionally, the glue dispensing process includes dispensing glue by a piezoelectric valve or a screw valve. Figure 8d As shown, after dispensing, the material 310 of the first adhesive layer contacts the first end face 511 and the second end face 521 respectively. Optionally, the thickness of the material 310 of the first adhesive layer is greater than the thickness of the first support film 510 or the second support film 520. In this way, when bending, the second part 212 gradually contacts the material 310 of the first adhesive layer and can squeeze the material 310 of the first adhesive layer, so that the bubbles in the material 310 of the first adhesive layer are discharged, avoiding bubbles or voids caused by uneven filling. In the embodiment of the present application, the material 310 of the first adhesive layer is in a semi-fluid state, so that it can be contoured and filled according to the shape of the outer surface of the second part 212, and the excess material will enter the accommodation space formed by the first sub-functional layer 210 and the first support film 510 (or the second support film 520).

[0050] Step S740, bending the portion to be bent to form a bent portion, while the material of the first adhesive layer contacts the outer convex surface.

[0051] In the embodiment of the present application, when bending, the material 310 of the first adhesive layer contacts the outer convex surface, and the outer convex surface squeezes the material 310 of the first adhesive layer to expel the bubbles in the material 310 of the first adhesive layer, thereby avoiding filling bubbles or filling voids. Optionally, after bending the portion to be bent 112a to form the bending portion 112, the method further includes: curing the material of the first adhesive layer 300 to obtain the first adhesive layer 300. The curing method includes thermal curing or ultraviolet curing. Optionally, after bending, UV glue is applied to the surface of the bending portion 112 away from the second portion 212, and cured to form a second adhesive layer 600, thereby obtaining Figure 8e The display module shown.

[0052] In a third aspect, an embodiment of the present application provides a display device, which includes the display panel in the above embodiment.

[0053] Fig. 9 is a schematic diagram of the structure of a display device provided by an embodiment of the present application. Fig. 9 As shown, the display device 10 is a product with an image display function. For example, the display device 10 can be used to display static images, such as pictures or photos. The display device 10 can also be used to display dynamic images, such as videos.

[0054] The display device 10 can be a notebook computer, a mobile phone, a handheld or portable computer, a camera, a camcorder, a vehicle-mounted intelligent central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0055] The display device 10 includes a display module provided by any of the above embodiments. The display panel included in the display module may be an organic light emitting diode display panel or a quantum dot electroluminescent display panel.

[0056] In addition, the display device 10 may also have functions such as taking pictures, recording, fingerprint recognition, face recognition, etc. Accordingly, the display device 10 also includes at least one functional module for realizing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, etc.

[0057] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0058] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0059] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0060] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0061] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

[0062] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display module, characterized in that: include: The display panel comprises a first plane portion, a bending portion and a second plane portion which are connected in sequence, wherein the first plane portion is arranged in a display area of ​​the display module, the bending portion is arranged in a bending area of ​​the display module, and the second plane portion is arranged on a non-display surface of the display module; a buffer layer, located between the first planar portion and the second planar portion, the buffer layer comprising a first sub-functional layer, the first sub-functional layer comprising a first portion and a second portion, the first portion being at least located in the display region, the second portion being at least located in the bending region, and at least a portion of an outer surface of the second portion facing away from the first portion being configured as an outer convex surface; The first adhesive layer is at least located in the bending area, and the first adhesive layer is located between the second part and the bending portion.

2. The display module according to claim 1, characterized in that: The cross-section of the second portion in the first direction includes at least one of a semicircle, a semi-ellipse, a gradient semicircle, or a polygon, wherein the first direction is perpendicular to the direction in which the first planar portion is located; Preferably, a cross section of the second portion in the first direction includes a first semicircle, and a radius of the first semicircle is greater than or equal to 0.035 mm and less than or equal to 0.05 mm; Preferably, the cross section of the bent portion in the first direction includes a second semicircle, and the difference between the radius of the second semicircle and the radius of the first semicircle is greater than 0.15 mm; Preferably, the center of the second semicircle coincides with the center of the first semicircle; Preferably, the thickness of the first portion is greater than or equal to 30 um and less than or equal to 50 um.

3. The display module according to claim 1, characterized in that: The first sub-functional layer comprises a metal layer; Preferably, the material of the first sub-functional layer includes at least one of copper, stainless steel, or titanium alloy; Preferably, the buffer layer further comprises a second sub-functional layer, and the second sub-functional layer is located between the first sub-functional layer and the first planar portion; Preferably, the second sub-functional layer is located in the display area, and the distance between the end surface of the second sub-functional layer close to the bending portion and the bending portion is greater than the distance between the end surface of the first portion close to the bending portion and the bending portion; Preferably, the second sub-functional layer comprises polyurethane foam or silicone gel; Preferably, the buffer layer further comprises a third sub-functional layer, and the third sub-functional layer is located between the second sub-functional layer and the first planar portion; Preferably, the third sub-functional layer is located in the display area, and an end surface of the third sub-functional layer close to the bending portion is flush with an end surface of the second sub-functional layer close to the bending portion; Preferably, the third sub-functional layer comprises grid glue.

4. The display module according to claim 1, characterized in that: The material of the first adhesive layer includes: at least one of epoxy photocurable adhesive, epoxy thermocurable adhesive, acrylic photocurable adhesive, or acrylic thermocurable adhesive; Preferably, the viscosity of the material of the first adhesive layer is greater than or equal to 1000 cps and less than or equal to 5000 cps; Preferably, the thixotropy of the material of the first adhesive layer is greater than 1.

5.

5. The display module according to claim 1, characterized in that: Also includes: A first supporting film is located between the first planar portion and the buffer layer, the first supporting film comprises a first end surface close to the bending portion, and the first end surface is in contact with the first adhesive layer; a second supporting film, located between the second planar portion and the buffer layer, the second supporting film comprising a second end surface close to the bending portion, the second end surface being in contact with the first adhesive layer; Preferably, a first accommodation space is formed between the first supporting film and the first sub-functional layer, and a portion of the first adhesive layer is located in at least a portion of the first accommodation space; Preferably, a second accommodation space is formed between the second supporting film and the first sub-functional layer, and a portion of the first adhesive layer is located in at least a portion of the second accommodation space; Preferably, the second end surface is flush with the first end surface; Preferably, the first end surface is flush with an end surface of the first portion close to the bending portion.

6. The display module according to claim 5, characterized in that: Also includes: A padding block, located between the buffer layer and the second supporting film; Preferably, the display module further comprises: a second adhesive layer, arranged on a side of the bent portion away from the first adhesive layer; Preferably, the display module further comprises a polarizing layer and a cover plate stacked in sequence on a side of the first planar portion away from the buffer layer; Preferably, the display module further includes a third adhesive layer located between the polarizing layer and the cover plate.

7. A method for assembling a display module, characterized in that: include: Providing a display panel before bending, the display panel comprising a first plane portion, a portion to be bent, and a second plane portion connected in sequence; A buffer layer is attached to the non-display surface of the first plane portion, the buffer layer includes a first sub-functional layer, the first sub-functional layer includes a first portion and a second portion, the orthographic projection of the first portion on the display panel at least partially overlaps with the first plane portion, the orthographic projection of the second portion on the display panel at least partially overlaps with the portion to be bent, and at least a portion of the outer surface of the second portion facing away from the first portion is configured as an outer convex surface; Filling the portion to be bent with a material of a first adhesive layer, wherein the material of the first adhesive layer is arranged on the same side as the buffer layer; The portion to be bent is bent to form a bent portion, and at the same time, the material of the first adhesive layer is in contact with the outer convex surface.

8. The display module assembly method according to claim 7, characterized in that: The material for filling the first adhesive layer on the portion to be bent includes: Filling the material of the first glue layer on the portion to be bent by a glue dispensing process; Preferably, the dispensing process includes dispensing through a piezoelectric valve or a screw valve; Preferably, the non-display surface of the first planar portion is provided with a first supporting film, the second planar portion is provided with a second supporting film, the second supporting film and the first supporting film are provided on the same side, the first supporting film includes a first end surface close to the portion to be bent, the second supporting film includes a second end surface close to the portion to be bent, and the material of the first adhesive layer is in contact with the first end surface and the second end surface respectively; Preferably, the thickness of the material of the first adhesive layer is greater than the thickness of the first supporting film or the second supporting film; Preferably, the material of the first adhesive layer is in a semi-fluid state.

9. The method for assembling a display module according to claim 7, characterized in that: After the portion to be bent is bent to form a bent portion, the method further comprises: curing the material of the first adhesive layer to obtain the first adhesive layer; Preferably, the curing method includes thermal curing or UV curing; Preferably, after the buffer layer is attached to the non-display surface of the first plane portion, the method further comprises: attaching a spacer block to a side of the buffer layer away from the first plane portion.

10. A display device, characterized in that: A display module comprising any one of claims 1 to 6, or a display module assembled by the method described in any one of claims 7 to 9.

Images