Display device and preparation method thereof

Abstract

The display device comprises a display panel, the display panel comprises a first part, a second part and a bending part, the first part and the second part are at least partially oppositely arranged, the bending part is connected with the first part and the second part, and the second part is located on the side, away from the light emitting side of the display panel, of the first part. The first part comprises a light emitting surface, and the bending part comprises an accommodating cavity; the buffer layer is located between the first part and the second part in the direction perpendicular to the light emitting surface; the supporting layer comprises a metal layer, the metal layer is arranged between the first part and the second part in the direction perpendicular to the light emitting face and located on the side, away from the display panel, of the buffer layer, and the metal layer extends by a preset distance in the direction where the bending part is located relative to the buffer layer; the first adhesive layer is located in the containing cavity, and the metal layer is partially embedded into the first adhesive layer. The damage to the bending part is reduced, and the reliability and the use performance of the display device are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic products, and in particular relates to a display device and a method for preparing the display device. Background Art

[0002] With the advancement of technology, digital display devices such as smart phones and tablet computers have been widely used, among which the display screen is an indispensable interpersonal communication interface in these display devices. OLED (Organic Light Emitting Diode) display devices have the advantages of self-luminescence, energy saving and consumption reduction, bendability, good flexibility, etc., and the display device that realizes display does not require a backlight source, has the characteristics of fast response speed and good display effect, and has attracted the attention of users and is widely used in terminal products such as smart phones and tablet computers.

[0003] However, due to the structural limitations of existing display devices, the reliability of the display devices cannot meet the requirements.

[0004] Therefore, a new display device and a method for manufacturing the display device are urgently needed. Summary of the invention

[0005] An embodiment of the present invention provides a display device and a method for preparing the display device, wherein a metal layer is partially embedded in a first adhesive layer, that is, an extending portion of the metal layer relative to the buffer layer in the direction of the bending portion is in contact with the first adhesive layer. When the bending portion is subjected to external force, the stress will be transmitted to the first adhesive layer and the metal layer in sequence through the bending portion. The entire metal layer is used to bear the stress, thereby reducing damage to the bending portion and improving the reliability and performance of the display device.

[0006] On the one hand, an embodiment of the present invention provides a display device, comprising: a display panel, the display panel comprising a first part, a second part and a bending portion connecting the first part and the second part, the second part being located on a side of the first part away from the light emitting side of the display panel, the first part comprising a light emitting surface, and the bending portion comprising a receiving cavity; a buffer layer, the buffer layer being located between the first part and the second part along a direction perpendicular to the light emitting surface; a supporting layer, the supporting layer comprising a metal layer, the metal layer being arranged between the first part and the second part along a direction perpendicular to the light emitting surface and being located on a side of the buffer layer away from the display panel, the metal layer extending a predetermined distance relative to the buffer layer in the direction of the bending portion; a first adhesive layer being located in the receiving cavity, and the metal layer being partially embedded in the first adhesive layer.

[0007] According to one aspect of this embodiment, the display panel further includes a second glue layer, the first glue layer includes a first sub-portion and a second sub-portion, the first sub-portion is located between the display panel and the buffer layer, and the second sub-portion is located in the gap between the first glue layer and the buffer layer.

[0008] According to one aspect of this embodiment, the elastic modulus of the material of the second adhesive layer is smaller than the elastic modulus of the material of the first adhesive layer; preferably, the elastic modulus of the material of the first adhesive layer is greater than or equal to 1000 MPa and less than or equal to 2000 MPa; preferably, the elastic modulus of the material of the second adhesive layer is greater than or equal to 50 MPa and less than or equal to 150 MPa; preferably, the material of the first adhesive layer includes at least one of epoxy resin and acrylic acid; preferably, the material of the second adhesive layer includes pressure-sensitive adhesive.

[0009] According to one aspect of this embodiment, the predetermined distance is greater than or equal to 0.2 mm and less than or equal to 0.4 mm.

[0010] According to one aspect of this embodiment, the buffer layer includes a first sublayer and a second sublayer, the first sublayer is arranged between the first part and the supporting layer, the second sublayer is arranged between the second part and the supporting layer, and the second adhesive layer is arranged between the first sublayer and the first part, and the second adhesive layer is arranged between the second sublayer and the second part; preferably, a cushioning layer is arranged between the second sublayer and the supporting layer.

[0011] On the other hand, an embodiment of the present invention provides a method for preparing a display device, comprising the following steps: providing a display panel to be bent, the display panel to be bent comprising a first area, a second area and a to-be-bent area connecting the first area and the second area; forming a buffer layer, the buffer layer being formed on a side of the display panel to be bent away from a light emitting surface; forming a supporting layer, the supporting layer comprising a metal layer, the supporting layer being formed on a side of the buffer layer away from the display panel to be bent, the metal layer extending a predetermined distance relative to the buffer layer in a direction of the to-be-bent area; applying glue to form a first glue layer on the to-be-bent area on the surface of the display panel to be bent away from the light emitting surface; bending the display panel to be bent to form a display panel, the display panel being the display panel in any of the above embodiments, and the metal layer being partially embedded in the first glue layer; curing the first glue layer to form a first glue layer.

[0012] According to another aspect of the present embodiment, between the steps of providing the display panel to be bent and forming the buffer layer, it also includes: forming a second adhesive layer on the surface of the display panel to be bent away from the light emitting surface; preferably, the elastic modulus of the material of the second adhesive layer is smaller than the elastic modulus of the material of the first adhesive layer.

[0013] According to another aspect of this embodiment, in the step of bending the display panel to be bent to form a display panel, wherein the display panel is the display panel in any of the above embodiments, the step of partially embedding the metal layer into the first adhesive layer glue also includes: the second adhesive layer partially overflows into the gap between the first adhesive layer glue and the buffer layer.

[0014] According to another aspect of this embodiment, the step of curing the first adhesive layer material to form a first adhesive layer includes: curing the first adhesive layer material to form a first adhesive layer by at least one process of high temperature curing, ultraviolet light curing, and room temperature moisture curing.

[0015] According to another aspect of the present embodiment, in the step of dispensing glue to form a first glue layer in the to-be-bent area on the surface of the side of the display panel to be bent away from the light emitting surface: the actual dispensing mass of the first glue layer is equal to 50% to 70% of the filling mass, wherein the filling mass is equal to the cross-sectional area of ​​the first glue layer along the direction perpendicular to the light emitting surface × the width of the display panel to be bent × the density of the first glue layer.

[0016] Compared with the related art, the display device provided by the embodiment of the present invention includes a display panel, a buffer layer, a support layer and a first adhesive layer. The first part includes a light emitting surface for light emitting display. The bending portion is bent relative to the first part and the second part. The buffer layer is located between the first part and the second part, and is used to bear and release the force exerted on the first part and the second part. The support layer includes a metal layer, which supports and bears the display panel. The first adhesive layer is arranged in a accommodating cavity corresponding to the bending portion, and the metal layer is partially embedded in the first adhesive layer, that is, the extending portion of the metal layer relative to the buffer layer in the direction of the bending portion is in contact with the first adhesive layer. When the bending portion is subjected to external force, the stress will be transmitted to the first adhesive layer and the metal layer in sequence through the bending portion, and the entire metal layer is used to bear the stress, thereby reducing the damage to the bending portion and improving the reliability and performance of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a schematic structural diagram of a display device provided according to an embodiment of the present invention;

[0019] Figure 2 An embodiment of the present invention provides Figure 1 Schematic diagram of the cross section at AA in the middle;

[0020] Figure 3 is a flow chart of a method for preparing a display device provided according to an embodiment of the present invention;

[0021] Figures 4 to 7 It is a schematic diagram of a structure obtained by a method for preparing a display device provided in one embodiment of the present invention.

[0022] In the attached figure:

[0023] 1-display panel; 11-first part; 12-second part; 13-bending part; 2-buffer layer; 21-first sub-layer; 22-second sub-layer; 3-support layer; 31-metal layer; 4-first adhesive layer; 4'-first adhesive material; 5-second adhesive layer; 51-first sub-part; 52-second sub-part; 6-pad layer; 7-polarizer; 8-optical adhesive layer; 9-impact-resistant layer; B-cover plate; D-circuit board; IC-control chip; F-packaging glue; A1-first area; A2-second area; A3-area to be bent. DETAILED DESCRIPTION

[0024] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0026] In order to better understand the present invention, Figures 1 to 7 A display device and a manufacturing method according to an embodiment of the present invention are described in detail.

[0027] In the prior art, in the current product structure, a screen bending process, namely the Padbending process, is performed. During the assembly process of the folded whole machine, since the bending area of ​​the screen is very fragile, it is very easy for human impact to occur in the bending area, resulting in poor display of the screen, causing the display panel to be damaged by external force, affecting the reliability of the display device.

[0028] In order to solve the above problems, the display device provided by the embodiment of the present invention partially embeds the metal layer into the first adhesive layer, that is, the extension of the metal layer relative to the buffer layer in the direction of the bending portion is in contact with the first adhesive layer. When the bending portion is subjected to external force, the stress will be transmitted to the first adhesive layer and the metal layer in sequence through the bending portion, and the entire metal layer will bear the stress, thereby reducing the damage to the bending portion and improving the reliability and performance of the display device.

[0029] See also Figure 1 to Figure 2 An embodiment of the present invention provides a display device, comprising: a display panel 1, the display panel 1 comprises a first portion 11, a second portion 12, and a bending portion 13 connecting the first portion 11 and the second portion 12, the second portion 12 being located on a side of the first portion 11 away from a light emitting side of the display panel 1, the first portion 11 comprising a light emitting surface, and the bending portion 13 comprising an accommodating cavity; a buffer layer 2, the buffer layer 2 being located between the first portion 11 and the second portion 12 along a direction perpendicular to the light emitting surface; a supporting layer 3, the supporting layer 3 comprising a metal layer 31, the metal layer 31 being located between the first portion 11 and the second portion 12 along a direction perpendicular to the light emitting surface, and being located on a side of the buffer layer 2 away from the display panel 1, the metal layer 31 extending a predetermined distance relative to the buffer layer 2 in a direction where the bending portion 13 is located; a first adhesive layer 4, being located in the accommodating cavity, and the metal layer 31 being partially embedded in the first adhesive layer 4.

[0030] The display device provided by the embodiment of the present invention includes a display panel 1, a buffer layer 2, a support layer 3 and a first adhesive layer 4. The first part 11 includes a light emitting surface for light emitting display. The bending portion 13 is bent relative to the first part 11 and the second part 12. The buffer layer 2 is located between the first part 11 and the second part 12, and is used to bear and release the force exerted on the first part 11 and the second part 12. The support layer 3 includes a metal layer 31, which supports and bears the display panel 1. The first adhesive layer 4 is arranged corresponding to the accommodating cavity of the bending portion 13, and the metal layer 31 is partially embedded in the first adhesive layer 4, that is, the extending portion of the metal layer 31 relative to the buffer layer 2 in the direction of the bending portion 13 is in contact with the first adhesive layer 4. When the bending portion 13 is subjected to external force, the stress will be transmitted to the first adhesive layer 4 and the metal layer 31 in sequence through the bending portion 13. The entire metal layer 31 is used to bear the stress, thereby reducing the damage to the bending portion 13 and improving the reliability and performance of the display device.

[0031] In this embodiment, the first part 11 includes a light emitting surface, and thus, the first part 11 may include a light emitting element, and the second part 12 is located on the backlight surface of the display device, and may include components such as a circuit board D and a chip, and the bending portion 13 connects the first part 11 and the second part 12, and thus, the bending portion 13 may include components such as a signal line connecting the first part 11 and the second part 12.

[0032] Optionally, the buffer layer 2 can be made of PET (Polyethylene Terephthalate) material, which is relatively soft and can play a buffering role. Of course, the buffer layer 2 can also be made of other materials that meet the requirements, without special restrictions. Optionally, the buffer layer 2 can include a single layer, which is only provided on one side of the first part 11, or only provided on one side of the second part 12, or can include two layers, that is, a buffer layer 2 is provided corresponding to the first part 11 and the second part 12, respectively, to ensure the buffering effect. It can be specifically provided according to actual needs, without special restrictions.

[0033] Optionally, the first adhesive layer 4 may be made of a high modulus adhesive material to ensure the stress transfer effect of the first adhesive layer 4, so that the first adhesive layer 4 can transfer the stress to the metal layer 31. Optionally, the material of the first adhesive layer 4 may include PSA (Pressure Sensitive Adhesive).

[0034] Optionally, the metal layer 31 can be made of materials such as stainless steel and copper, which can not only ensure the supporting effect but also play a role in heat dissipation.

[0035] See also Figure 2In some optional embodiments, the display panel 1 also includes a second glue layer 5, the first glue layer 4 includes a first sub-portion 51 and a second sub-portion 52, the first sub-portion 51 is located between the display panel 1 and the buffer layer 2, and the second sub-portion 52 is located in the gap between the first glue layer 4 and the buffer layer 2.

[0036] It should be noted that the second sub-portion 52 is located in the gap between the first adhesive layer 4 and the buffer layer 2 to serve as a lubricating buffer between the first adhesive layer 4 and the buffer layer 2. Specifically, when the display device adopts a folding display device, the overall structure of the display device will slip during the bending process, and the average moving distance each time is estimated to be between 30um-50um. At this time, the second sub-portion 52 of the second adhesive layer 5 plays a lubricating role between the first adhesive layer 4 and the buffer layer 2.

[0037] The second sub-portion 52 may be prepared separately, or the second adhesive layer 5 in direct contact with the display panel 1 may overflow during the pressing process after the display device is bent, thereby filling the gap between the first adhesive layer 4 and the buffer layer 2 to form the second sub-portion 52 .

[0038] Optionally, the elastic modulus of the material of the second adhesive layer 5 is smaller than the elastic modulus of the material of the first adhesive layer 4. The elastic modulus refers to the stress required for a material to produce a unit elastic deformation under the action of an external force. It is an indicator of the material's ability to resist elastic deformation. The larger the elastic modulus, the less likely the material is to deform, and the stronger the rigidity and the greater the hardness. The smaller the elastic modulus, the easier the material is to deform. In this embodiment, the elastic modulus of the material of the second adhesive layer 5 is limited to be smaller than the elastic modulus of the material of the first adhesive layer 4, so that the second adhesive layer 5 overflows during the compression process after the display device is bent, thereby filling the gap between the first adhesive layer 4 and the buffer layer 2, and the elastic modulus of the material of the first adhesive layer 4 is increased to ensure the stress transfer effect of the first adhesive layer 4, so that the first adhesive layer 4 can transfer the stress to the metal layer 31.

[0039] Optionally, the elastic modulus of the material of the first adhesive layer 4 is greater than or equal to 1000 MPa and less than or equal to 2000 MPa. For example, the elastic modulus of the material of the first adhesive layer 4 may be equal to any one of 1000 MPa, 1200 MPa, 1400 MPa, 1600 MPa, 1800 MPa, and 2000 MPa.

[0040] Optionally, the elastic modulus of the material of the second adhesive layer 5 is greater than or equal to 50 MPa and less than or equal to 150 MPa; for example, the elastic modulus of the material of the second adhesive layer 5 may be equal to any one of 50 MPa, 70 MPa, 90 MPa, 110 MPa, 130 MPa, and 150 MPa.

[0041] Optionally, the material of the first adhesive layer 4 includes at least one of epoxy resin and acrylic acid;

[0042] Optionally, the material of the second adhesive layer 5 includes pressure-sensitive adhesive.

[0043] In some optional embodiments, the predetermined distance is greater than or equal to 0.2 mm and less than or equal to 0.4 mm. It should be noted that the predetermined distance of the metal layer 31 extending in the direction of the bending portion 13 relative to the buffer layer 2 should not be too large, otherwise it may affect the bending portion 13, nor should it be too small, otherwise it will result in too small a contact area between the first adhesive layer 4 and the metal layer 31, resulting in poor stress transfer effect. Optionally, the predetermined distance can be equal to any one of 0.2 mm, 0.3 mm, and 0.4 mm.

[0044] See also Figure 2 In some optional embodiments, the buffer layer 2 includes a first sublayer 21 and a second sublayer 22, the first sublayer 21 is arranged between the first part 11 and the supporting layer 3, the second sublayer 22 is arranged between the second part 12 and the supporting layer 3, and the second adhesive layer 5 is arranged between the first sublayer 21 and the first part 11, and the second adhesive layer 5 is arranged between the second sublayer 22 and the second part 12.

[0045] In this embodiment, the first sublayer 21 and the second sublayer 22 can be prepared by the same material to reduce production costs. The second adhesive layer 5 is arranged between the first sublayer 21 and the first part 11 to connect the first sublayer 21 and the first part 11 through the second adhesive layer 5. Similarly, the second adhesive layer 5 is arranged between the second sublayer 22 and the second part 12 to connect the second sublayer 22 and the second part 12 through the second adhesive layer 5, that is, two layers of second adhesive layers 5 are provided, and the second sub-part 52 of the second adhesive layer 5 can respectively fill the gap between the first sublayer 21 and the first adhesive layer 4, and the gap between the second sublayer 22 and the first adhesive layer 4.

[0046] Optionally, a cushioning layer 6 is provided between the second sub-layer 22 and the supporting layer 3 to ensure support and fixation of the display panel 1 .

[0047] Optionally, a polarizer 7, an optical adhesive layer 8, a cover plate B and other film layers are further provided on the side of the first part 11 away from the buffer layer 2. Among them, OCA (Optically Clear Adhesive, optical adhesive layer 8), OCA adhesive is a double-sided adhesive tape without a base material obtained by making optical acrylic adhesive into a base material, and then laminating a layer of release film on the upper and lower bottom layers. The adhesive layer of OCA has uniform thickness and high flatness; it has high adhesion and high bonding strength after lamination.

[0048] The cover plate B is a film layer made of materials such as glass with high light transmittance, which plays a role in protecting the display panel 1. Specifically, the cover plate B can be made of flexible materials so that the cover plate B can be folded, so that it can be applied to a flexible and foldable display module. Specifically, the cover plate B can be made of transparent, soft, and foldable materials such as UTG (Ultra Thin Glass), CPI (Colorless Polyimide), and PET (Polyethylene Terephthalate) to achieve the bendability and foldability of the cover plate B, which is convenient for application in a foldable display device.

[0049] Optionally, components such as a control chip IC and a circuit board D are provided on a side of the third portion facing away from the buffer layer 2 , and the control chip IC, the circuit board D and the display panel 1 are electrically connected.

[0050] Optionally, packaging glue F is provided on the outer surface of the bending portion 13 .

[0051] See also Figure 3 The embodiment of the present invention further provides a method for manufacturing a display device, comprising the following steps:

[0052] S110: providing a display panel 1 to be bent, wherein the display panel 1 to be bent comprises a first area A1, a second area A2, and an area A3 to be bent connecting the first area A1 and the second area A2. Figure 4 As shown;

[0053] S120: forming a buffer layer 2, wherein the buffer layer 2 is formed on a side of the display panel 1 to be bent away from the light emitting surface, such as Figure 5 As shown;

[0054] S130: forming a support layer 3, the support layer 3 comprising a metal layer 31, the support layer 3 is formed on the side of the buffer layer 2 away from the display panel 1 to be bent, and the metal layer 31 extends a predetermined distance relative to the buffer layer 2 in the direction of the bending area A3, such as Figure 6 As shown;

[0055] S140: dispensing glue to form a first glue layer 4' on the to-be-bent area A3 of the surface of the to-be-bent display panel 1 facing away from the light-emitting surface. Figure 7 As shown;

[0056] S150: bending the display panel 1 to be bent to form a display panel 1, wherein the display panel 1 is the display panel 1 in any of the above embodiments, and the metal layer 31 is partially embedded in the first adhesive layer 4', such as Figure 2 As shown;

[0057] S160 : curing the first adhesive layer adhesive material 4 ′ to form a first adhesive layer 4 .

[0058] The display device preparation method provided in the embodiment of the present invention limits the metal layer 31 to extend a predetermined distance relative to the buffer layer 2 in the direction of the to-be-bent area A3, so that after the to-be-bent display panel 1 is bent to form the display panel 1, the first adhesive layer adhesive 4' wraps the protruding part of the metal layer 31, that is, the metal layer 31 is partially embedded in the first adhesive layer adhesive 4'. After the first adhesive layer adhesive 4' is cured to form the first adhesive layer 4, the metal layer 31 is partially embedded in the first adhesive layer 4. When the bending portion 13 of the display panel 1 is subjected to external force, the stress will be transmitted to the first adhesive layer 4 and the metal layer 31 in sequence through the bending portion 13. The entire metal layer 31 is used to bear the stress, thereby reducing the damage to the bending portion 13 and improving the reliability and performance of the display device.

[0059] In step S110, the display panel 1 may be an OLED (Organic Light Emitting Diode) or a quantum dot display panel 1. Of course, the display device provided in the embodiment of the present invention may also be a quantum dot light emitting diode (Quantum Dot Light Emitting Diodes, referred to as QLED) or a micro flat display device (Micro-OLED or Micro-LED), etc.

[0060] In step S120, the buffer layer 2 may be made of PET (Polyethylene Terephthalate) material.

[0061] In step S130 , the metal layer 31 can be made of materials such as stainless steel and copper, which can not only ensure the supporting effect but also play a role in heat dissipation.

[0062] In step S140, a first adhesive layer 4' can be formed by a dispensing process, and the actual dispensing mass of the first adhesive layer 4' is equal to 50% to 70% of the filling mass, wherein the filling mass is equal to the cross-sectional area of ​​the first adhesive layer 4 along the direction perpendicular to the light emitting surface × the width of the display panel 1 to be bent × the density of the first adhesive layer 4', so as to ensure the dispensing effect and avoid too much or too little first adhesive layer 4'.

[0063] In step S150 , during the bending process of the display panel 1 , the first adhesive layer 4 ′ has not yet solidified. The first adhesive layer 4 ′ has a certain fluidity and can wrap a portion of the metal layer 31 .

[0064] In step S160 , the first adhesive layer adhesive material 4 ′ may be cured by at least one of high temperature curing, ultraviolet light curing, and room temperature moisture curing to form the first adhesive layer 4 .

[0065] In some optional embodiments, between the steps of providing the display panel 1 to be bent and forming the buffer layer 2 , the step further includes: forming a second adhesive layer 5 on a surface of the display panel 1 to be bent away from the light emitting surface.

[0066] In this embodiment, the second adhesive layer 5 can be used to bond the buffer layer 2 and the display panel 1 to be bent, that is, the buffer layer 2 can be formed on the side of the second adhesive layer 5 away from the display panel 1 to be bent.

[0067] Optionally, the elastic modulus of the material of the second adhesive layer 5 is smaller than the elastic modulus of the material of the first adhesive layer 4. In this embodiment, the elastic modulus of the material of the second adhesive layer 5 is limited to be smaller than the elastic modulus of the material of the first adhesive layer 4, so that the second adhesive layer 5 overflows during the compression process after the display device is bent, thereby filling the gap between the first adhesive layer 4 and the buffer layer 2, and the elastic modulus of the material of the first adhesive layer 4 is increased to ensure the stress transfer effect of the first adhesive layer 4, so that the first adhesive layer 4 can transfer the stress to the metal layer 31.

[0068] Optionally, in the step of bending the display panel 1 to be bent to form the display panel 1, the display panel 1 in any of the above embodiments, the metal layer 31 is partially embedded in the first adhesive layer 4', and the second adhesive layer 5 partially overflows into the gap between the first adhesive layer 4' and the buffer layer 2.

[0069] Specifically, when the display device adopts a folding display device, the overall structure of the display device will slip during the bending process, and the average movement distance each time is expected to be between 30um-50um. At this time, the second sub-portion 52 of the second adhesive layer 5 plays a lubricating role between the first adhesive layer 4 and the buffer layer 2.

[0070] The display device provided in the embodiment of the present invention can be applied to a mobile phone, or any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiment of the present invention does not make any special limitations on this.

[0071] The above is only a specific implementation of the present invention. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the system, module and unit described above can refer to the location process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be covered within the protection scope of the present invention.

[0072] It should also be noted that the exemplary embodiments mentioned in the present invention describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiments, or in a different order from the embodiments, or several steps can be performed simultaneously.

Claims

1. A display device, characterized in that: include: A display panel, the display panel comprising a first portion and a second portion at least partially arranged opposite to each other, and a bending portion connecting the first portion and the second portion, the second portion being located on a side of the first portion away from a light emitting side of the display panel, the first portion comprising a light emitting surface, and the bending portion comprising a receiving cavity; a buffer layer, located between the first portion and the second portion along a direction perpendicular to the light emitting surface; A support layer, the support layer comprising a metal layer, the metal layer being disposed between the first portion and the second portion along a direction perpendicular to the light emitting surface and located on a side of the buffer layer away from the display panel, and the metal layer extending relative to the buffer layer in a direction where the bending portion is located by a predetermined distance; The first adhesive layer is located in the accommodating cavity, and the metal layer is partially embedded in the first adhesive layer.

2. The display device according to claim 1, characterized in that The display panel further includes a second glue layer, the first glue layer includes a first sub-portion and a second sub-portion, the first sub-portion is located between the display panel and the buffer layer, and the second sub-portion is located in a gap between the first glue layer and the buffer layer.

3. The display device according to claim 2, characterized in that: The elastic modulus of the material of the second adhesive layer is smaller than the elastic modulus of the material of the first adhesive layer; Preferably, the elastic modulus of the material of the first adhesive layer is greater than or equal to 1000 MPa and less than or equal to 2000 MPa; Preferably, the elastic modulus of the material of the second adhesive layer is greater than or equal to 50 MPa and less than or equal to 150 MPa; Preferably, the material of the first adhesive layer includes at least one of epoxy resin and acrylic acid; Preferably, the material of the second adhesive layer includes pressure-sensitive adhesive.

4. The display device according to claim 1, characterized in that The predetermined distance is greater than or equal to 0.2 mm and less than or equal to 0.4 mm.

5. The display device according to claim 2, characterized in that: The buffer layer includes a first sublayer and a second sublayer, the first sublayer is arranged between the first portion and the support layer, the second sublayer is arranged between the second portion and the support layer, the second adhesive layer is arranged between the first sublayer and the first portion, and the second adhesive layer is arranged between the second sublayer and the second portion; Preferably, a cushioning layer is provided between the second sub-layer and the supporting layer.

6. A method for preparing a display device, characterized in that: The following steps are involved: Providing a display panel to be bent, wherein the display panel to be bent comprises a first area, a second area, and an area to be bent connecting the first area and the second area; forming a buffer layer, wherein the buffer layer is formed on a side of the display panel to be bent away from the light emitting surface; forming a support layer, the support layer comprising a metal layer, the support layer being formed on a side of the buffer layer away from the display panel to be bent, and the metal layer extending a predetermined distance relative to the buffer layer in a direction where the area to be bent is located; Dispensing glue on a to-be-bent area of ​​the surface of the to-be-bent display panel facing away from the light-emitting surface to form a first glue layer; Bending the display panel to be bent to form a display panel, wherein the display panel is the display panel according to any one of claims 1 to 5, and the metal layer is partially embedded in the first adhesive layer; The first adhesive layer adhesive material is cured to form a first adhesive layer.

7. The method for manufacturing a display device according to claim 6, characterized in that: Between the steps of providing the display panel to be bent and forming the buffer layer, the method further includes: forming a second adhesive layer on a surface of the display panel to be bent that is away from the light emitting surface; Preferably, the elastic modulus of the material of the second adhesive layer is smaller than the elastic modulus of the material of the first adhesive layer.

8. The method for manufacturing a display device according to claim 7, characterized in that: In the step of bending the display panel to be bent to form a display panel, the display panel is the display panel according to any one of claims 1 to 5, and the step of partially embedding the metal layer into the first adhesive layer adhesive material further includes: The second adhesive layer partially overflows into the space between the adhesive material of the first adhesive layer and the buffer layer.

9. The method for manufacturing a display device according to claim 6, characterized in that: The step of curing the first adhesive layer adhesive material to form the first adhesive layer includes: The first adhesive layer adhesive material is cured by at least one process selected from the group consisting of high temperature curing, ultraviolet light curing, and room temperature moisture curing to form a first adhesive layer.

10. The method for manufacturing a display device according to claim 6, characterized in that: In the step of forming a first adhesive layer by dispensing adhesive on the to-be-bent area of ​​the surface of the to-be-bent display panel facing away from the light-emitting surface: The actual dispensing mass of the first adhesive layer is equal to 50% to 70% of the filling mass, wherein the filling mass is equal to the cross-sectional area of ​​the first adhesive layer along the direction perpendicular to the light emitting surface×the width of the display panel to be bent×the density of the first adhesive layer.

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