Display device and manufacturing method thereof

Abstract

The invention provides a display device and a manufacturing method thereof, the display device comprises a supporting layer, an adhesive layer, a protective film, a display panel, a polarizing layer, an optical adhesive layer and a cover plate which are sequentially stacked, and the supporting layer is a composite material layer formed by hot pressing of a metal layer and a carbon fiber layer; according to the flexible module, the supporting layer is arranged to be the composite material layer of the metal layer and the carbon fiber layer, the surface flatness of the flexible module can be improved, and meanwhile due to the fact that the rigid material such as the metal layer is added, the front face impact resistance of the module can be improved; the thickness of one adhesive layer can be removed, the purpose of module thinning is achieved, the composite adhesive force between the metal layer and the carbon fiber layer is better than the effect that the metal layer and the carbon fiber plate are assembled through single body attachment, and the risk of module stripping can be reduced. According to the display device and the manufacturing method thereof, the structure is simple, manufacturing is convenient, stability is high, cost is low, the product weight can be effectively reduced, and meanwhile the display effect is improved.

Description

Technical Field

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

[0002] With the advent of many electronic products such as smartphones and tablets, people's requirements for the experience and comfort of electronic products are getting higher and higher. For flexible folding display products, in order to achieve the purpose of reducing the weight of the module, it is usually necessary to reduce the proportion of metal materials in the product. The original module back support material usually uses metal materials. At present, in order to reduce weight, most modules use carbon fiber materials instead of metal materials as support materials. However, the surface flatness of the module using carbon fiber boards is worse than that of metal materials. Figure 2 As shown, it will cause poor light and shadow on the surface of the display device, affect the optical effect of the whole device and cause the bending area to arch. Therefore, a display device with light weight and good display effect is urgently needed. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a display device and a manufacturing method thereof.

[0004] In a first aspect of the present application, a display device is provided, comprising a supporting layer, an adhesive layer, a protective film, a display panel, a polarizing layer, an optical adhesive layer and a cover plate stacked in sequence, wherein the supporting layer is a composite material layer formed by hot pressing a metal layer and a carbon fiber layer.

[0005] In some embodiments, the support layer includes one metal layer and multiple carbon fiber layers, the number of the carbon fiber layers is an odd number, and the axial angle of carbon fibers between two adjacent carbon fiber layers is 90°.

[0006] In some embodiments, the metal layer is located on one side of the plurality of carbon fiber layers, or between two adjacent carbon fiber layers.

[0007] In some embodiments, the metal layer is provided with a plurality of via holes arranged at intervals, or the metal layer is subjected to a roughening process.

[0008] In some embodiments, the thickness of the metal layer is 0.02 mm to 0.05 mm, the thickness of the carbon fiber layer located in the middle of the support layer is 0.1 mm to 0.13 mm, and the thickness of the remaining carbon fiber layers is 0.02 mm to 0.05 mm.

[0009] In some embodiments, the support layer includes a bending region, and the bending region is formed with a first pattern.

[0010] In some embodiments, the metal layer is provided with a through groove along the length direction of the bending zone, and the through groove is spaced apart from the bending zone.

[0011] In some embodiments, a through groove is respectively provided on both sides of the bending zone along the width direction, the width of the through groove is greater than or equal to 0.1 mm, and the distance between the through groove and the bending zone is greater than or equal to 1.5 mm.

[0012] In some embodiments, a groove is provided on the carbon fiber layer farthest from the adhesive layer, the groove covers the bending area, and a conductive block is provided in the groove.

[0013] In some embodiments, a distance between an edge of the groove and an edge of the bending zone is greater than or equal to 1.5 mm.

[0014] A second aspect of the present application provides a method for manufacturing a display device, including stacking an adhesive layer, a protective film, a display panel, a polarizing layer, an optical adhesive layer and a cover plate on a support layer, wherein the preparation method of the support layer includes: stacking a first glass plate, a metal layer, a carbon fiber layer, a release paper and a second glass plate, and then performing a vacuum process, a hot pressing process and a graphic process to form the support layer.

[0015] In some embodiments, the temperature of the hot pressing process is 80° C. to 140° C., and the hot pressing time is less than or equal to 60 min.

[0016] As can be seen from the above, the present application provides a display device and a manufacturing method thereof, wherein the display device comprises a support layer, an adhesive layer, a protective film, a display panel, a polarizing layer, an optical adhesive layer and a cover plate which are sequentially stacked, and the support layer is a composite material layer formed by hot pressing a metal layer and a carbon fiber layer; by setting the support layer as a composite material layer of a metal layer and a carbon fiber layer, compared with a display device with a pure carbon fiber board as a support layer, the surface flatness of the flexible module can be improved, and at the same time, due to the addition of a rigid material such as a metal layer, the front impact resistance of the module can be improved; relative to a display device in which a metal layer and a carbon fiber board are directly bonded to form a support layer, the thickness of a layer of the adhesive layer can be removed to achieve the purpose of thinning the module, and the composite adhesion between the metal layer and the carbon fiber layer will be better than the effect of assembling the metal layer and the carbon fiber board by monomer bonding, which can reduce the risk of module peeling, and at the same time, due to the elimination of the etching and assembly process of the ultra-thin metal, the yield of the support layer can be improved to achieve the purpose of reducing costs; the display device and its manufacturing method have simple structure, convenient manufacturing, strong stability, low cost, can effectively reduce the weight of the product, and at the same time improve the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 1 It is a structural schematic diagram of a display device in the related art;

[0019] Figure 2 for Figure 1 A schematic diagram of the display effect of the display device;

[0020] Figure 3 It is a structural schematic diagram of another display device in the related art;

[0021] Figure 4 This is a schematic diagram of the structure of a display device in an embodiment of the present application;

[0022] Figure 5 is a schematic diagram of the cross-sectional structure of the first support layer;

[0023] Figure 6 Schematic diagram of the prepreg structure of the carbon fiber layer;

[0024] Figure 7 for Figure 5 Schematic diagram of the production process of the middle support layer;

[0025] Figure 8 for Figure 5 Schematic diagram of laser cutting of the middle support layer;

[0026] Fig. 9 for Figure 5 Schematic diagram of the bending zone structure of the middle support layer;

[0027] Fig.10 is a schematic diagram of the cross-sectional structure of the second support layer;

[0028] Fig.11 is a schematic diagram of the cross-sectional structure of the third supporting layer;

[0029] Fig.12 is a schematic diagram of the cross-sectional structure of the fourth supporting layer;

[0030] Fig.13 for Fig.12 A schematic diagram of the top view of the structure of the middle support layer;

[0031] Fig.14 for Fig.12 Schematic diagram of the production process of the middle support layer;

[0032] Fig.15 is a schematic diagram of the cross-sectional structure of the fifth supporting layer;

[0033] Fig.16 for Fig.15 A schematic diagram of the top view of the structure of the middle support layer;

[0034] Fig.17 for Fig.15 Schematic diagram of the production process of the middle support layer.

[0035] Figure numerals: 1, support layer; 1-1, metal layer; 1-1-1, through groove; 1-2, carbon fiber layer; 1-2-1, carbon filament; 1-2-2, resin; 1-2-3, groove; 1-2-4, conductive block; 1-3, first glass plate; 1-4, release paper; 1-5, second glass plate; 1-6, protective layer; 2, adhesive layer; 3, protective film; 4, display panel; 5, polarizing layer; 6, optical adhesive layer; 7, cover plate; 8, bending area; 9, sealing bag. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0037] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] With the advent of many electronic products such as smartphones and tablets, people's requirements for the experience and comfort of electronic products are getting higher and higher. For flexible folding display products, in order to achieve the purpose of reducing the weight of the module, it is usually necessary to reduce the proportion of metal materials in the product. The original module back support material usually uses metal materials. At present, in order to reduce weight, most modules use carbon fiber materials instead of metal materials as support materials. However, the surface flatness of the module using carbon fiber boards is worse than that of metal materials. Figure 2As shown, it will cause poor light and shadow on the surface of the display device, affect the optical effect of the whole device and cause the bending area to arch. Therefore, a display device with light weight and good display effect is urgently needed.

[0039] In the process of implementing the present application, it is found that the stacking structure of the existing display device is as follows Figure 1 As shown, from top to bottom, they are: a cover plate 7, used to protect the display device and enhance the resistance to external impact; an optical adhesive layer 6, used to bond the cover plate 7 and the polarizing layer 5. At the same time, in a folded display device, the low modulus optical adhesive layer 6 can reduce the stress between the laminated layers and prevent peeling during the bending process of the module; a polarizing layer 5, which prevents the external ambient light from interfering with the display effect. The polarizing layer 5 contains glue and is used to bond with the display panel 4, and can also be integrated into the display panel 4; the display panel 4 is a neutral layer of the display device, and a touch layer (FMLO) can be integrated. C) and polarizing layer 5 (COE); protective film 3, a non-display surface protection structure of display panel 4, used to balance stress and protect display panel 4, protective film 3 contains glue, used to be bonded with display panel 4; carbon fiber layer 1-2, provides support for flexible module, and is bonded with display panel 4 with adhesive layer 2, and a pattern design is performed in bending area 8 of carbon fiber layer 1-2 to ensure that module can be bent in bending area 8, and non-bending area 8 has no pattern design to ensure flatness of non-bending area 8 of module, but the tensile modulus of carbon fiber layer 1-2 is slightly lower than that of stainless steel plate of the same thickness, such as Figure 2 As shown, this causes the light reflected by the module under the light to be distorted, that is, poor light and shadow. At the same time, due to the patterned design, the bending area 8 of the carbon fiber layer 1-2 will have arches or dents after a certain number of bending times, affecting the appearance of the product.

[0040] In order to improve the problem of poor light and shadow and module flatness, in some display devices, an ultra-thin metal layer 1-1 is added between the carbon fiber layer 1-2 and the display panel 4. The tensile modulus of the metal layer 1-1 is ≥95Gpa, and the metal material can be stainless steel (SUS), etc. The thickness of the metal layer 1-1 is in the range of 0.02mm to 0.05mm. Figure 3 As shown, two adhesive layers 2, a metal layer 1-1 and a carbon fiber layer 1-2 are provided under the display panel 4. The thickness of the adhesive layer 2 is in the range of 0.02mm to 0.05mm. The carbon fiber layer 1-2 usually adopts a three-layer prepreg stacking structure with a total thickness in the range of 0.15mm to 0.2mm. The support structure design scheme of adding the metal layer 1-1 will cause the total thickness of the display device to increase by at least 0.05mm. At the same time, since the metal layer 1-1 and the carbon fiber layer 1-2 are assembled by a bonding process, the metal layer 1-1 needs to be etched and formed before bonding. The ultra-thin metal etching yield is ≤5%, and the yield of the assembled support structure is generally ≤2%, resulting in an increase in the cost of the support structure.

[0041] Below, through specific embodiments and combined Figures 4 to 17 To describe the technical solution of this application in detail.

[0042] In some embodiments of the present application, a display device is provided, such as Figure 4 As shown, it includes a support layer 1, an adhesive layer 2, a protective film 3, a display panel 4, a polarizing layer 5, an optical adhesive layer 6 and a cover plate 7 which are stacked in sequence. The support layer 1 is a composite material layer formed by hot pressing a metal layer 1-1 and a carbon fiber layer 1-2.

[0043] like Figure 4 As shown, the display device includes a support layer 1, an adhesive layer 2, a protective film 3, a display panel 4, a polarizing layer 5, an optical adhesive layer 6 and a cover plate 7; the cover plate 7 is used to protect the display device and enhance the resistance to external impact; the optical adhesive layer 6 is used to bond the cover plate 7 and the polarizing layer 5. At the same time, in the folded display device, the low-modulus optical adhesive layer 6 can reduce the stress between the laminated layers and prevent peeling during the bending process of the module; the polarizing layer 5 prevents the external ambient light from interfering with the display effect, and the polarizing layer 5 contains glue and is used to bond with the display panel 4; the display panel 4 is a neutral layer of the display device, and a touch layer and a polarizing layer can be integrated; the protective film 3 is a non-display surface protection structure of the display panel 4, which is used to balance the stress and protect the display panel 4, and the protective film 3 contains glue and is used to fit with the display panel 4; the support layer 1 provides support for the flexible module, and can be patterned in the bending area 8 to ensure that the module can be bent in the bending area 8, and the non-bending area 8 has no pattern design to ensure the flatness of the non-bending area 8 of the module.

[0044] like Figure 5 As shown, the support layer 1 is a composite material layer formed by hot pressing a metal layer 1-1 and a carbon fiber layer 1-2. The manufacturing method is as follows Figure 7 As shown, a first glass plate 1-3, a metal layer 1-1, a carbon fiber layer 1-2, a release paper 1-4 and a second glass plate 1-5 are stacked, and then a vacuum process, a hot pressing process and a graphic process are performed to form a support layer 1; by setting the support layer 1 as a composite material layer of the metal layer 1-1 and the carbon fiber layer 1-2, compared with a display device in which a pure carbon fiber plate is used as the support layer 1, the surface flatness of the flexible module can be improved, and at the same time, due to the addition of a rigid material such as the metal layer 1-1, the front impact resistance of the module can be improved; compared with a display device in which the metal layer 1-1 and the carbon fiber plate are directly bonded to form the support layer 1, the thickness of a layer of adhesive layer 2 can be removed to achieve the purpose of thinning the module, and the composite adhesion between the metal layer 1-1 and the carbon fiber layer 1-2 will be better than the effect of assembling the metal layer 1-1 and the carbon fiber plate by monomer bonding, which can reduce the risk of module peeling, and at the same time, due to the elimination of the etching and assembly process of the ultra-thin metal, the yield of the support layer 1 can be improved to achieve the purpose of reducing costs.

[0045] The display device has a simple structure, is easy to manufacture, has strong stability, and is low in cost, and can effectively reduce product weight while improving display effects.

[0046] In some embodiments, Figure 5 As shown, the support layer 1 includes one metal layer 1-1 and multiple carbon fiber layers 1-2. The number of the carbon fiber layers 1-2 is an odd number, and the axial angle of the carbon fibers between two adjacent carbon fiber layers 1-2 is 90°.

[0047] like Figure 5 As shown, the support layer 1 includes a metal layer 1-1 and multiple carbon fiber layers 1-2. The number of carbon fiber layers 1-2 is an odd number, such as 3 layers, 5 layers, etc. Figure 7 As shown, the axial angle of the carbon fibers of two adjacent carbon fiber layers 1-2 is 90°, that is, the carbon fiber layers 1-2 are arranged orthogonally in pairs, ensuring that the carbon fiber layers 1-2 as a whole can achieve a higher modulus and improve flatness.

[0048] In some embodiments, Figure 5 , Fig.10 and Fig.11 As shown, the metal layer 1-1 is located on one side of the multiple carbon fiber layers 1-2, or between two adjacent carbon fiber layers 1-2.

[0049] like Figure 5 As shown, the metal layer 1-1 can be arranged on one side of the multi-layer carbon fiber layer 1-2, which can improve the rigidity and flatness of the display device. Fig.10 and Fig.11 As shown, the metal layer 1-1 can also be arranged between two adjacent carbon fiber layers 1-2, which can improve the stiffness of the carbon fiber layers 1-2 as a whole.

[0050] like Figure 5 The support layer 1 shown in the figure, the ultra-thin metal layer 1-1 is placed on one side of the adhesive layer 2, and is arranged close to the display panel 4 in the laminate of the flexible display device. The ultra-thin metal can be designed with holes on the entire surface or roughened, which is conducive to better bonding between the metal and the resin 1-2-2 and the fiber. The adhesive layer 2 is a double-sided adhesive or a light-curing (OCA) adhesive; the metal layer 1-1 is an ultra-thin metal made of SUS or titanium alloy; the carbon fiber layer 1-2 is a three-layer prepreg. The ultra-thin metal and carbon fiber composite process flow is referred to Figure 7 , the support layer 1 and the adhesive layer 2 are realized by a sheet bonding process.

[0051] like Fig.10The support layer 1 shown in the figure, the ultra-thin metal layer 1-1 is placed between the three carbon fiber layers 1-2. The ultra-thin metal can be designed with holes on the entire surface or roughened, which is conducive to better bonding between the metal and the resin 1-2-2 and the fiber. The adhesive layer 2 is a double-sided adhesive or a light-curing adhesive. The metal layer 1-1 is an ultra-thin metal made of SUS or titanium alloy; the carbon fiber layer 1-2 is a three-layer prepreg. The ultra-thin metal and carbon fiber composite process flow refers to Figure 7 , only the stacking order of the metal layer 1-1 and the carbon fiber layer 1-2 is changed, and the support layer 1 and the adhesive layer 2 are realized by a sheet bonding process.

[0052] In some embodiments, the metal layer 1 - 1 is provided with a plurality of via holes arranged at intervals, or the metal layer 1 - 1 is subjected to a roughening process.

[0053] Before the metal layer 1-1 is combined with the carbon fiber layer 1-2, vias can be provided on the entire surface, or the surface can be roughened to facilitate better combination of the metal with the resin 1-2-2 and the fiber.

[0054] In some embodiments, the thickness of the metal layer 1-1 is 0.02mm to 0.05mm, the thickness of the carbon fiber layer 1-2 located in the middle of the support layer 1 is 0.1mm to 0.13mm, and the thickness of the remaining carbon fiber layers 1-2 is 0.02mm to 0.05mm.

[0055] The thickness of the metal layer 1-1 is 0.02mm to 0.05mm, for example, 0.02mm, 0.03mm, 0.04mm or 0.05mm; when the carbon fiber layer 1-2 is three-layer, the thickness of the middle carbon fiber layer 1-2 is 0.1mm to 0.13mm, for example, 0.1mm, 0.11mm, 0.121mm or 0.13mm, and the thickness of the top and bottom carbon fiber layers 1-2 is 0.02mm to 0.05mm, for example, 0.02mm, 0.03mm, 0.04mm or 0.05mm, so that the middle carbon fiber layer 1-2 is thick and the carbon fiber layers 1-2 at both ends are thin, so as to ensure that the carbon fiber layer 1-2 as a whole achieves a higher modulus.

[0056] In some embodiments, Fig. 9 As shown, the support layer 1 includes a bending area 8, and the bending area 8 is formed with a first pattern.

[0057] like Fig. 9 As shown, a first pattern is formed in the bending area 8 by laser cutting. The first pattern is, for example, through holes arranged in a staggered manner, so that the bending area 8 is easy to fold.

[0058] In some embodiments, Fig.12 and Fig.13As shown in the figure, the L direction is the length direction of the bending zone 8, and the W direction is the width direction of the bending zone 8. The metal layer 1-1 is provided with a through groove 1-1-1 along the length direction of the bending zone 8, and the through groove 1-1-1 is spaced apart from the bending zone 8.

[0059] like Fig.12 and Fig.13 As shown, the metal layer 1-1 is provided with a through groove 1-1-1 on the outside of the bending area 8, which can provide capacity space for the folding operation and avoid the bending area 8 from being arched or dented.

[0060] like Fig.12 As shown, the adhesive layer 2 is a double-sided adhesive or a light-curing adhesive, the metal layer 1-1 is an ultra-thin metal made of SUS or titanium alloy; the carbon fiber layer 1-2 is a three-layer prepreg. Fig.14 , including setting a protective layer 1-6 on both sides of the metal layer 1-1, forming a through groove 1-1-1 by laser cutting the protective layer 1-6 and the metal layer 1-1 on one side, and not cutting the other protective layer 1-6, removing the cut protective layer 1-6, pre-pressing the prepreg of the metal layer 1-1 and the carbon fiber layer 1-2, removing the other protective layer 1-6, and then stacking a glass plate and a release paper 1-4 for vacuuming and hot pressing.

[0061] In some embodiments, Fig.13 As shown, a through groove 1-1-1 is respectively provided on both sides of the bending zone 8 along the width direction, the width of the through groove 1-1-1 is greater than or equal to 0.1 mm, and the distance between the through groove 1-1-1 and the bending zone 8 is greater than or equal to 1.5 mm.

[0062] like Fig.13 As shown, through grooves 1-1-1 are provided on both sides of the bending zone 8 to further provide folding capacity and avoid arching or dents in the bending zone 8. The metal layer 1-1 is of discontinuous design. In the figure, a is the width of the through groove 1-1-1, a is greater than or equal to 0.1mm, and can be adjusted according to folding requirements. The distance between the through groove 1-1-1 and the bending zone 8 is greater than or equal to 1.5mm. When preparing samples, the ultra-thin metal is first intermittently prepared, which can be processed by laser or etching. The metal layer 1-1 is made by opening the through groove 1-1-1. After opening the through groove 1-1-1, it is necessary to maintain the distance from the bending zone 8 to prevent metal lamination. In addition, additional coating can be used to ensure that the through groove 1-1-1 is not deformed.

[0063] In some embodiments, Fig.15 and Fig.16 As shown, a groove 1-2-3 is provided on the carbon fiber layer 1-2 farthest from the adhesive layer 2, the groove 1-2-3 covers the bending area 8, and a conductive block 1-2-4 is provided in the groove 1-2-3.

[0064] like Fig.15 As shown, the carbon fiber layer 1-2 on the non-glue surface of the support layer 1 is provided with a groove 1-2-3. The groove 1-2-3 is arranged along the length direction of the bending zone 8, can be a through hole, and covers the bending zone 8. The conductive block 1-2-4 is filled in the groove 1-2-3. The conductive block 1-2-4 is made of the same material as the metal layer 1-1, for example, and is used for module electrical conduction.

[0065] Its production process is as follows Fig.17 As shown, etching is performed on the three carbon fiber layers 1-2 to form grooves 1-2-3, and then the conductive blocks 1-2-4 are deposited, and then the glass plates and release paper 1-4 are stacked, and vacuuming and hot pressing processes are performed.

[0066] In some embodiments, Fig.16 As shown, the distance between the edge of the groove 1-2-3 and the edge of the bending zone 8 is greater than or equal to 1.5 mm.

[0067] like Fig.16 As shown, b is the distance between the edge of the groove 1-2-3 and the edge of the bending zone 8, and b is greater than or equal to 1.5 mm, ensuring that the conductive block 1-2-4 can cover the bending zone 8.

[0068] In some embodiments, the display panel 4 includes: a thin film encapsulation layer, which is arranged at the outermost layer of the display panel 4 and is used to block external dust and water vapor, etc., to prevent external dust and water vapor from affecting the internal film layer; a thin film transistor array layer, which is arranged on one side of the thin film encapsulation layer; an OLED device layer, which is arranged on the side of the thin film transistor array layer away from the thin film encapsulation layer, including multiple OLED display devices, and the OLED display device includes an anode layer, a cathode layer, a light-emitting functional layer, an electron transport layer, a hole transport layer and a hole injection layer, wherein the anode layer is electrically connected to the drain of the thin film transistor array layer; the material of the cathode layer adopts a low work function material, which can improve the efficiency of electron injection; secondly, it can reduce the Joule heat generated when the OLED is working and improve the life of the device.

[0069] The light-emitting functional layer is used for emitting light. Multiple light-emitting layers are provided to improve the light-emitting brightness of the OLED device. The light-emitting layer may include a host material and a guest material doped in the host material. The doping ratio of the guest material in the light-emitting layer is 1% to 20%. Within the doping ratio range, on the one hand, the host material of the light-emitting layer can effectively transfer the exciton energy to the guest material of the light-emitting layer to excite the guest material of the light-emitting layer to emit light. On the other hand, the host material of the light-emitting layer "dilutes" the guest material of the light-emitting layer, effectively improving the mutual collision between the molecules of the guest material of the light-emitting layer, and the fluorescence quenching caused by the mutual collision between the energy, thereby improving the luminous efficiency and the life of the device. In an exemplary embodiment, the doping ratio refers to the ratio of the mass of the guest material to the mass of the light-emitting layer, that is, the mass percentage. In an exemplary embodiment, the host material and the guest material can be co-evaporated by a multi-source evaporation process, so that the host material and the guest material are uniformly dispersed in the light-emitting layer 3-1. The doping ratio can be regulated by controlling the evaporation rate of the guest material during the evaporation process, or by controlling the evaporation rate ratio of the host material and the guest material.

[0070] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0071] In the embodiments of the present application, "film" and "layer" can be interchanged. For example, sometimes "conductive layer" can be replaced by "conductive film". Similarly, sometimes "insulating film" can be replaced by "insulating layer". The proportions of the drawings in the embodiments of the present application can be used as a reference in the actual process, but are not limited to this. For example: the width-to-length ratio of the channel, the thickness and spacing of each film layer can be adjusted according to actual needs. The number of pixels in the array substrate and the number of sub-pixels in each pixel are not limited to the numbers shown in the figures. The drawings described in the embodiments of the present application are only structural schematic diagrams, and a method in the embodiments of the present application is not limited to the shapes or values ​​shown in the drawings.

[0072] The triangle, rectangle, trapezoid, pentagon or hexagon in the embodiment of the present application is not in the strict sense, and may be an approximate triangle, rectangle, trapezoid, pentagon or hexagon, etc. There may be some small deformations caused by tolerance, and there may be chamfers, arc edges and deformations.

[0073] In addition, when details are set forth to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the present application embodiments can be implemented without these details or with changes in these details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0074] In some embodiments of the present application, a method for manufacturing a display device is provided, including stacking an adhesive layer 2, a protective film 3, a display panel 4, a polarizing layer 5, an optical adhesive layer 6 and a cover plate 7 on a support layer 1, wherein the preparation method of the support layer 1 includes: stacking a first glass plate 1-3, a metal layer 1-1, a carbon fiber layer 1-2, a release paper 1-4 and a second glass plate 1-5, and then performing a vacuum process, a hot pressing process and a patterning process to form the support layer 1.

[0075] The metal layer 1-1 and the carbon fiber layer 1-2 are squeezed through a double-layer glass plate, and a support layer 1 is formed through a vacuum and hot pressing process, thereby eliminating the middle glue layer, thereby achieving a thinner module and improved flatness of the module.

[0076] like Figure 6 As shown, the lower prepreg of the carbon fiber layer 1-2 is made of a combination of a resin 1-2-2 and a carbon filament 1-2-1. The resin 1-2-2 commonly used in folding products is bisphenol A type resin. The resin 1-2-2 with a curing agent added is heated to form a membrane, and then compounded with the carbon filament 1-2-1 to form a prepreg; the three layers of prepreg are stacked in a 90°-0°-90° manner, the thickness of the prepreg in the 90° direction is generally 0.02mm to 0.05mm, and the thickness of the prepreg in the 0° direction is generally 0.1mm to 0.13mm. The carbon filament 1-2-1 used in the prepreg can be T700, M40 and other models.

[0077] like Figure 7 As shown, a metal layer 1-1 is added to one side of the three-layer carbon fiber layer 1-2 so as to form a metal-carbon fiber composite material by subsequent hot pressing. In order to ensure better bonding between the metal, carbon fiber and resin, the surface of the metal layer 1-1 can be roughened to increase the contact area, or vias can be added to the metal layer 1-1 to enhance the bonding force between the resin 1-2-2 and the metal layer 1-1. After the prepreg and the metal layer 1-1 are laid, a first glass plate 1-3 coated with a release agent needs to be placed on one side to ensure the flatness of the plate, and a release paper 1-4 is placed on the other side, and a second glass plate 1-5 is added to the outside of the release paper 1-4. That is, the metal and the prepreg need to be fixed and pressed by a double-layer glass plate. After completing the above steps, put it into a sealed bag 9 for vacuuming, and put the sealed bag 9 into an autoclave for high-temperature hot pressing. The hot pressing temperature is generally between 80°C and 140°C, and the hot pressing time is generally ≤60min.

[0078] like Figure 8 As shown, after hot pressing, the graphic process is performed according to the design requirements of the folding product. Laser processing can be used to verify and debug the appropriate laser process parameters for laser cutting according to the thickness of the different support layers 1. The laser starts cutting from the release paper 1-4 side. An additional protective layer 1-6 needs to be attached to the metal layer 1-1 side to prevent the formation of backburning accumulation on the metal layer 1-1 during laser cutting. The cutting waste generated on the metal layer 1-1 side can be removed with the protective film 3. After cutting, the metal layer 1-1 side is surface treated and then the adhesive layer 2 is attached.

[0079] The "patterning process" mentioned in the embodiments of the present application includes processes such as coating photoresist, mask exposure, development, etching, and stripping photoresist for metal materials, inorganic materials, or transparent conductive materials, and includes processes such as coating organic materials, mask exposure, and development for organic materials. Deposition can be any one or more of sputtering, evaporation, and chemical vapor deposition, coating can be any one or more of spraying, spin coating, and inkjet printing, and etching can be any one or more of dry etching and wet etching, without limitation.

[0080] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0081] In addition, to simplify the description and discussion, and in order not to make the embodiment of the present application difficult to understand, the known power supply / ground connection with other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiment of the present application difficult to understand, and this also takes into account the following fact, that is, the details of the implementation method of these block diagram devices are highly dependent on the platform to be implemented in the embodiment of the present application (that is, these details should be completely within the scope of understanding of those skilled in the art). In the case of elaborating specific details to describe the exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiment of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0082] Although the present application has been described in conjunction with the specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. The present application embodiments are intended to encompass all such replacements, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application embodiments should be included in the protection scope of the present application.

Claims

1. A display device, characterized in that: It comprises a supporting layer, an adhesive layer, a protective film, a display panel, a polarizing layer, an optical adhesive layer and a cover plate which are stacked in sequence, wherein the supporting layer is a composite material layer formed by hot pressing a metal layer and a carbon fiber layer.

2. The display device according to claim 1, characterized in that The support layer includes one metal layer and multiple carbon fiber layers, the number of the carbon fiber layers is an odd number, and the axial angle of carbon fibers between two adjacent carbon fiber layers is 90°.

3. The display device according to claim 2, characterized in that The metal layer is located on one side of the plurality of carbon fiber layers, or between two adjacent carbon fiber layers.

4. The display device according to claim 2, characterized in that: The metal layer is provided with a plurality of via holes arranged at intervals, or the metal layer is subjected to a roughening process.

5. The display device according to claim 2, characterized in that: The thickness of the metal layer is 0.02 mm to 0.05 mm, the thickness of the carbon fiber layer located in the middle of the support layer is 0.1 mm to 0.13 mm, and the thickness of the remaining carbon fiber layers is 0.02 mm to 0.05 mm.

6. The display device according to claim 2, characterized in that: The support layer includes a bending area, and the bending area is formed with a first pattern.

7. The display device according to claim 6, characterized in that: The metal layer is provided with a through groove along the length direction of the bending zone, and the through groove is spaced apart from the bending zone.

8. The display device according to claim 7, characterized in that: A through groove is respectively provided on both sides of the bending zone along the width direction, the width of the through groove is greater than or equal to 0.1 mm, and the distance between the through groove and the bending zone is greater than or equal to 1.5 mm.

9. The display device according to claim 6, characterized in that: A groove is provided on the carbon fiber layer farthest from the adhesive layer, the groove covers the bending area, and a conductive block is provided in the groove.

10. The display device according to claim 9, characterized in that: The distance between the edge of the groove and the edge of the bending area is greater than or equal to 1.5 mm.

11. A method for manufacturing a display device, characterized in that: It includes stacking an adhesive layer, a protective film, a display panel, a polarizing layer, an optical adhesive layer and a cover plate on a support layer, wherein the preparation method of the support layer includes: stacking a first glass plate, a metal layer, a carbon fiber layer, a release paper and a second glass plate, and then performing a vacuum process, a hot pressing process and a graphic process to form the support layer.

12. The method for manufacturing a display device according to claim 11, characterized in that: The temperature of the hot pressing process is 80° C. to 140° C., and the hot pressing time is less than or equal to 60 minutes.

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