Display module, manufacturing method thereof and display device

Abstract

The invention discloses a display module, a manufacturing method thereof and a display device. The display module comprises a composite supporting layer, a display panel and a protection piece, the display panel comprises a first body, a second body and a bending part connecting the first body and the second body, the first body is arranged on the first side of the composite supporting layer, and the second body is arranged on the second side, opposite to the first side, of the composite supporting layer. The protection piece comprises a first protection part and a second protection part which are connected with each other; according to the application, the first protection part is firstly arranged in the enclosed space between the bending part and the composite supporting layer, and then the second protection part is arranged outside the enclosed space, so that the gelation rate of the first protection part is different from that of the second protection part, and the first protection part and the second protection part are respectively prepared; according to the display module, the problem that the filling rates of the protective material inside and outside the bending section are different is solved, bubbles in the bending section of the display module are avoided, and the stability of a product is improved.

Description

Technical Field

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

[0002] As electronic devices pursue the development trend of the ultimate full screen, display screens (such as mobile phones) are emerging in the market in an endless stream. In order to pursue the diversification of the appearance of display devices, the narrow bezel design of the display screen is particularly important.

[0003] In current narrow-border display screens, the edge area of ​​the display screen has insufficient supporting force, resulting in poor impact resistance of the display screen. In order to improve the impact resistance of the display screen, an integrally formed molded polymer is usually provided in the edge area of ​​the display screen. However, during the filling process of the molded polymer, due to the different filling rates inside and outside the bending section of the flexible panel, bubbles appear in the bending section of the flexible panel, affecting the stability of the display screen. Summary of the invention

[0004] The present application provides a display module and a manufacturing method thereof, and a display device to improve the technical problem of bubbles appearing in the bending section of the existing display screen.

[0005] To solve the above-mentioned problems, the technical solutions provided by this application are as follows:

[0006] In a first aspect, the present application provides a display module, comprising:

[0007] Composite support layer;

[0008] The display panel comprises a first body, a second body and a bending portion connecting the first body and the second body, wherein the first body is arranged on a first side of the composite support layer, and the second body is arranged on a second side of the composite support layer opposite to the first side;

[0009] A protective member, comprising a first protective portion and a second protective portion connected to each other, wherein at least a portion of the first protective portion is located in the enclosed space between the bending portion and the composite supporting layer, and the second protective portion is connected to a surface of the bending portion away from the composite supporting layer;

[0010] The gelation rate of the first protection portion is different from the gelation rate of the second protection portion.

[0011] Optionally, the first protection portion includes a first filling portion and a first extending portion that are connected to each other, the first filling portion is located in the enclosed space, and the first extending portion is arranged outside the enclosed space.

[0012] Optionally, the composite support layer includes a first backplane, a second backplane, and a functional support layer provided between the first backplane and the second backplane, the first backplane is in contact with the first body, and the second backplane is in contact with the second body;

[0013] Wherein, the first extension portion contacts a surface of the functional support layer on a side away from the first back plate.

[0014] Optionally, a functional mark is provided at an end of the functional support layer close to the bending portion, and the functional mark is spaced apart from an edge of the bending portion;

[0015] Wherein, the first extension portion extends toward a side away from the enclosed space, and the first extension portion is spaced apart from the functional mark.

[0016] Optionally, the second protecting portion includes a second filling portion and a second extending portion connected to each other, the second filling portion is located outside the enclosed space, the second extending portion is arranged in the enclosed space, and the second extending portion contacts an edge of the first protecting portion.

[0017] Optionally, the first protection portion and the second protection portion are made of the same material.

[0018] Optionally, an elastic modulus of the first protecting portion is smaller than an elastic modulus of the second protecting portion.

[0019] Optionally, a curing rate of the first protection portion is greater than a curing rate of the second protection portion.

[0020] Optionally, the first protecting portion is a non-molded polymer and the second protecting portion is a molded polymer.

[0021] Optionally, the first protection part is a heat-curing material, and the second protection part is a heat-curing or light-curing material.

[0022] Optionally, an interface between the first protection portion and the second protection portion is a curved surface.

[0023] Optionally, the display module further comprises a driving chip electrically connected to the second body, and the driving chip is arranged on a side of the second body away from the first body;

[0024] The second protection portion covers the bending portion and at least a portion of the second body, and in a direction from the bending portion to the second body, the second protection portion and the driving chip are spaced apart.

[0025] Optionally, the protection member further includes a third protection portion connected to the second protection portion, the second protection portion and the third protection portion form a closed annular structure, and the annular structure covers the periphery of the display panel.

[0026] Optionally, the display module further comprises a cover plate disposed on a side of the first body away from the composite supporting layer, the cover plate comprising a planar portion and a curved portion located outside the planar portion, and the curved portion comprises a plurality of side sub-portions located around the planar portion and a corner sub-portion located between two adjacent side sub-portions;

[0027] The second protection portion is at least connected to a surface of the bending portion on a side away from the composite supporting layer, and the side sub-portion corresponding to the bending portion and the adjacent corner sub-portion.

[0028] In a second aspect, the present application further proposes a display device, which includes the above-mentioned display module and a middle frame, and the second protection part and the third protection part in the protective member fill the area between the middle frame and the display panel.

[0029] In a third aspect, the present application further proposes a method for manufacturing a display module, which comprises:

[0030] A display panel is provided, the display panel comprising a first body, a second body and a bending portion connecting the first body and the second body, wherein a first supporting portion is provided on a side of the first body away from a light emitting surface of the display module, and a second supporting portion is provided on a side of the second body away from the light emitting surface;

[0031] forming a first protective material on a side of the bent portion away from the light emitting surface;

[0032] The second body is bent to a side of the first body away from the light emitting surface, so that a surface of the first supporting portion away from the first body is in contact with a surface of the second supporting portion away from the second body, and the first protective material is located in an enclosed space between the bent portion and the first supporting portion and the second supporting portion;

[0033] curing the first protective material to form a first protective portion;

[0034] forming a second protective material connected to the first protective portion on a surface of the bending portion away from the composite supporting layer, and curing the second protective material to form a second protective portion;

[0035] The gelation rate of the first protection portion is different from the gelation rate of the second protection portion.

[0036] Beneficial effect: The present application first sets a first protective part in the enclosed space between the bending part and the composite supporting layer, and then sets a second protective part outside the enclosed space, so that the gelation rate of the first protective part and the gelation rate of the second protective part are different. The present application prepares the first protective part and the second protective part separately, thereby eliminating the problem caused by the different filling rates of the protective material inside and outside the bending section, avoiding the occurrence of bubbles in the bending section of the display module, and improving the stability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0038] Figure 1 The structural diagram of the module is displayed for this application;

[0039] Figure 2 for Figure 1 The first type of cross-section view of the middle section AA;

[0040] Figure 3 for Figure 1 The second cross-sectional view of the middle section AA;

[0041] Figure 4 This is a film layer structure diagram of the display panel in the display module of this application;

[0042] Figure 5 This is a structural diagram of the module before bending for this application;

[0043] Figure 6 This is a structural diagram of the module after bending for this application;

[0044] Figure 7 for Figure 1 The first structural diagram of the middle section BB;

[0045] Figure 8 for Figure 1 The second structural diagram of the middle section BB;

[0046] Fig. 9 for Figure 1 The third structural diagram of the middle section BB;

[0047] Fig.10 for Figure 1 Enlarged view of the middle area M;

[0048] Fig.11 for Fig.10 An enlarged view of the region A or region B in which the second protection portion is not formed;

[0049] Fig.12 for Fig.10An enlarged view after the second protection portion is formed in the middle area A or area B;

[0050] Fig.13 for Figure 3 Structural diagram of the middle cover layer;

[0051] Fig.14 for Figure 1 The exploded view of the module is shown in the figure;

[0052] Fig.15 This is a step diagram of the manufacturing method of the display module of this application. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0054] See also Figures 1 to 14 The present application proposes a display module 100 , which includes a composite support layer 20 , a display panel 10 and a protective member 30 .

[0055] In this embodiment, the display panel 10 includes a first body 110, a second body 120, and a bending portion 130 connecting the first body 110 and the second body 120. The first body 110 is disposed on a first side of the composite support layer 20, and the second body 120 is disposed on a second side of the composite support layer 20 opposite to the first side.

[0056] In this embodiment, the protective member 30 includes a first protective portion 31 and a second protective portion 32 connected to each other, at least a portion of the first protective portion 31 is located in the enclosed space WTL between the bending portion 130 and the composite supporting layer 20, and the second protective portion 32 is connected to the surface of the bending portion 130 away from the composite supporting layer 20.

[0057] In the present embodiment, the gelation rate of the first protection portion 31 and the gelation rate of the second protection portion 32 are different.

[0058] It should be noted that, for the current narrow-framed display screen, in order to improve the impact resistance of the display screen, an integrally formed molded polymer is usually provided in the edge area of ​​the display screen. However, during the filling process of the molded polymer, since the enclosed space WTL of the bending portion 130 and the composite support layer 20 is a long tunnel structure, under the low-pressure and low-temperature in-mold injection molding process, the filling rate of the protective material in the enclosed space WTL is lower than the filling rate of the protective material outside the enclosed space WTL, that is, after the protective material outside the enclosed space WTL completely fills the bottom frame of the display module 100, the enclosed space WTL is not completely filled with the protective material, resulting in the openings on both sides of the enclosed space WTL being covered by the protective material outside the enclosed space WTL, so that the air in the enclosed space WTL cannot be removed, resulting in a technical problem of bubbles appearing in the enclosed space WTL of the flexible panel.

[0059] The present application first sets a first protection portion 31 in the enclosed space WTL between the bending portion 130 and the composite supporting layer 20, and then sets a second protection portion 32 outside the enclosed space WTL, so that the gelation rate of the first protection portion 31 and the gelation rate of the second protection portion 32 are different. The first protection portion 31 and the second protection portion 32 are prepared separately, which eliminates the problem of different filling rates of the protective material inside the bending portion 130 and outside the bending portion 130, avoids the occurrence of bubbles in the bending portion 130 of the display module 100, and improves the stability of the product.

[0060] It should be noted that the gelation rate of the present application refers to the mass fraction of the gel part formed by the polymer during the cross-linking process, which characterizes the degree of cross-linking of the polymer; and the gelation rate is related to the type and content of the cross-linking agent, as well as reaction conditions such as reaction temperature, time and pressure. Therefore, the first protection part 31 and the second protection part 32 of the present application have different gelation rates, which can characterize that the first protection part 31 and the second protection part 32 are formed in different process steps.

[0061] The technical solution of the present application is now described in conjunction with specific embodiments.

[0062] In this embodiment, the first body 110 has a display area and a non-display area adjacent to the display area. For example, the non-display area surrounds the display area so that the display area is surrounded by the non-display area. The display area is an area in the display panel 10 for performing a display function, and a plurality of display units for realizing the display function are arranged therein. The non-display area may be a frame area of ​​the display panel 10, and a functional component may be arranged therein to assist the display unit in the display area to perform display.

[0063] In this embodiment, the second body 120 is provided with a binding terminal 121, which can be connected to an external circuit, and transmits a signal input from the external circuit to a data line, thereby driving the display panel 10 to display a picture. For example, the binding terminal 121 can be bound and connected to a driver chip IC, etc., to provide power and a driving signal, etc., to the display panel 10.

[0064] In this embodiment, a plurality of fan-out wirings are disposed in the bending portion 130 to implement data transmission between the second body 120 and the first body 110 .

[0065] See also Figure 4 , Figure 4 Schematic diagram of the display panel 10 of the present application. The display panel 10 may include a base substrate 140, a driving circuit layer 150 disposed on the base substrate 140, a pixel definition layer 160 and a light emitting device layer 170 disposed on the driving circuit layer 150, and an encapsulation layer 180 disposed on the pixel definition layer 160.

[0066] In the present embodiment, the base substrate 140 supports various layers disposed on the base substrate 140. When the display panel is a bottom-emitting light-emitting display device or a double-sided light-emitting display device, a transparent base substrate is used. When the display panel is a top-emitting light-emitting display device, a semi-transparent or opaque base substrate as well as a transparent base substrate can be used.

[0067] In the present embodiment, the substrate substrate 140 is made of an insulating material such as glass, quartz or polymer resin. The substrate substrate 140 may be a rigid substrate or a flexible substrate that can be bent, folded, rolled, etc. Examples of flexible materials for the flexible substrate include polyimide (PI), but are not limited to polyimide (PI).

[0068] See also Figure 4 The driving circuit layer 150 may include a plurality of thin film transistors, which may be of an etch-stop type, a back-channel etch type, or may be divided into a bottom-gate thin film transistor, a top-gate thin film transistor, and the like according to the position of the gate electrode and the active layer, without any specific limitation. For example, Figure 4 The thin film transistor shown in the figure is a top-gate thin film transistor, which may include a light shielding unit 151 disposed on a substrate, a buffer layer 152 disposed on the light shielding unit 151, an active layer 153 disposed on the buffer layer 152, a gate insulating layer 154 disposed on the active layer 153, a gate layer 155 disposed on the gate insulating layer 154, an inter-insulating layer 156 disposed on the gate layer 155, a source-drain electrode layer 157 disposed on the inter-insulating layer 156, and a planar layer 158 disposed on the source-drain electrode layer 157; Figure 4The structure of the thin film transistor is only an example of the present application, and other types of thin film transistors are also applicable to the present application.

[0069] See also Figure 4 The light emitting device layer 170 may further include an anode layer 171 disposed on the planar layer 158, a light emitting layer 172 disposed on the anode layer 171, and a cathode layer 173 disposed on the light emitting layer 172. The anode layer 171 includes a plurality of anodes, the pixel definition layer 160 includes a plurality of pixel openings corresponding to the plurality of anodes, and each pixel opening exposes an upper surface of an anode, and the light emitting layer may include a plurality of light emitting pixels corresponding to the plurality of anodes.

[0070] See also Figure 4 The encapsulation layer 180 covers the pixel definition layer 160 and continuously covers multiple pixel openings and multiple light-emitting pixels; wherein the encapsulation layer 180 may include at least a first inorganic encapsulation layer 181, a first organic encapsulation layer 182 and a second inorganic encapsulation layer 183 stacked on the pixel definition layer 160.

[0071] See also Figure 2 and Figure 3 The display module 100 further includes a polarizer 40 , a cover layer 50 , and an optical adhesive layer 60 disposed between the polarizer 40 and the cover layer 50 , and the cover layer 50 is bonded to the polarizer 40 through the optical adhesive layer 60 .

[0072] In this embodiment, a circle of ink layer 70 may be provided on one side of the cover layer 50 close to the optical adhesive layer 60 . The ink layer 70 may be used to shield the peripheral area of ​​the display module 100 , so the ink layer 70 may define the edge area of ​​the display module 100 .

[0073] See also Figure 2 and Figure 3 The display module 100 also includes a composite support layer 20 disposed between the first body 110 and the second body 120. The composite support layer 20 includes a first back plate 21, a second back plate 22, and a functional support layer 23 disposed between the first back plate 21 and the second back plate 22. The first back plate 21 is in contact with the first body 110, and the second back plate 22 is in contact with the second body 120.

[0074] In this embodiment, the material of the first back plate 21 and the second back plate 22 may include polyethylene terephthalate or the like.

[0075] In this embodiment, the functional support layer 23 may include a heat dissipation buffer layer 231 (Super Clean Foam, SCF) and a filling rubber layer 232 (Stiffener, STF), the filling rubber layer 232 is arranged between the second back plate 22 and the heat dissipation buffer layer 231; the heat dissipation buffer layer 231 may include a grid rubber layer, a foam layer and a metal layer stacked in sequence, or a grid rubber layer, a foam layer, a polyimide layer and a metal layer stacked in sequence.

[0076] It should be noted that for a foldable display device, the functional support layer 23 may include a stacked structure of a buffer layer, a rigid layer and a heat dissipation layer. The material of the buffer layer may be a foam or a polyimide layer, the material of the rigid layer may be stainless steel, a metal titanium layer or carbon fiber, etc., and the material of the heat dissipation layer may be a graphite or copper layer, etc.

[0077] In this embodiment, the boundary of the heat dissipation buffer layer 231 close to the bending portion 130 is retracted relative to the boundary of the first back plate 21 close to the bending portion 130, and the boundary of the filling glue layer 232 close to the bending portion 130 is retracted relative to the boundary of the second back plate 22 close to the bending portion 130.

[0078] In this embodiment, the display module 100 further includes a protective adhesive layer 80 disposed on the display panel 10 . The protective adhesive layer 80 covers the bent portion 130 and a portion of the first body 110 and a portion of the second body 120 .

[0079] In this embodiment, the material of the protective adhesive layer 80 may be ultraviolet light curing adhesive.

[0080] It should be noted that the technical solution of the present application is applicable to both non-folding display devices and folding display devices; for non-folding display devices, the cover layer of the present application can be a hard cover layer, and for folding display devices, the cover layer can be a protective layer of ultra-thin glass and built-in optical adhesive.

[0081] See also Figure 2 and Figure 3 The display module 100 also includes a protective member 30 having a first protective portion 31 and a second protective portion 32. The bending portion 130 and the composite supporting layer 20 enclose an enclosed space WTL. At least part of the first protective portion 31 is located in the enclosed space WTL. The second protective portion 32 can be located on the surface of the bending portion 130 away from the composite supporting layer 20. For example, the second protective portion 32 can cover the bending portion 130, at least part of the first body 110 and at least part of the second body 120, and the second protective portion 32 is connected to the surface of the cover layer 50 close to the display panel 10.

[0082] In this embodiment, the first protection part 31 and the second protection part 32 of the present application can be formed in different processes. For example, the first protection part 31 can be formed by a dispensing process, and the second protection part 32 can be formed by low-pressure and low-temperature in-mold injection molding.

[0083] For example, see Figure 5 Before the display panel 10 is bent, the filling glue layer 232 and the second back plate 22 are arranged on the side of the second body 120 away from the light emitting surface 10a, the first back plate 21 and the heat dissipation buffer layer 231 can be arranged on the side of the first body 110 away from the light emitting surface 10a, the first back plate 21 and the heat dissipation buffer layer 231 constitute the first supporting portion 20a, and the filling glue layer 232 and the second back plate 22 constitute the second supporting portion 20b.

[0084] First, in Figure 5 In the structure, the first protective material 31a can be formed on the surface of the bending portion 130 away from the light emitting surface 10a of the display panel 10 by using a dispensing process; secondly, after the first protective material 31a is cured for the first time, the second body 120 is bent to the side of the first body 110 away from the light emitting surface 10a, so that the surface of the first supporting portion 20a away from the first body 110 and the surface of the second supporting portion 20b away from the second body 120 are in contact, and the first protective material 31a is located in the enclosed space WTL between the bending portion 130 and the first supporting portion 20a and the second supporting portion 20b, and the first protective material 31a is cured for the second time to form. Figure 6 Finally, a second protective material connected to the first protective portion 31 is formed on the surface of the bending portion 130 away from the composite support layer 20 by a low-pressure and low-temperature in-mold injection molding process, for example, in a vacuum environment, and the second protective material is cured to form Figure 2 or Figure 3 structure.

[0085] In this embodiment, since the material of the first protection part 31 can be pre-formed through a dispensing process and fills the enclosed space WTL after being extruded by the bending part 130, the present application does not have the technical problem of the material of the second protection part 32 covering the openings on both sides of the enclosed space WTL, thereby avoiding the problem of bubbles appearing in the bending part 130 of the display module 100 and improving the stability of the product.

[0086] It should be noted that, since the first protective material 31a fills the enclosed space WTL after being squeezed by the bending portion 130, the present application can set more first protective material 31a in the middle area of ​​the bending portion 130, so that the first protective material 31a in the middle area is squeezed by the bending portion 130 and diffuses to both sides of the enclosed space WTL, further avoiding residual bubbles in the enclosed space WTL.

[0087] It should be noted that since the first protection part 31 is formed by a dispensing process and the second protection part 32 is formed by a low-pressure and low-temperature in-mold injection molding process, the first protection part 31 of the present application can be a non-molded polymer and the second protection part 32 can be a molded polymer.

[0088] In this embodiment, the elastic modulus of the first protection portion 31 is smaller than the elastic modulus of the second protection portion 32. Since the impact resistance of the edge of the display module 100 is improved, the deformation resistance of the bending portion 130 needs to be improved, and the second protection portion 32 mainly plays a buffering role, that is, it is necessary to improve the buffering effect of the second protection portion 32 on the bending portion 130. Therefore, the present application can reduce the elastic modulus of the first protection portion 31 and increase the elastic modulus of the second protection portion 32, so that the elastic modulus of the first protection portion 31 is smaller than the elastic modulus of the second protection portion 32, that is, the deformation resistance of the first protection portion 31 on the bending portion 130 is improved, and the buffering effect of the second protection portion 32 on the bending portion 130 is also improved, thereby improving the impact resistance of the edge of the display module 100 and improving the stability of the product.

[0089] In this embodiment, the curing shrinkage rate of the material of the first protection part 31 can be greater than the curing shrinkage rate of the second protection part 32, and the curing shrinkage rate is the shrinkage rate of the material from the liquid state to the curing stage. Since the larger the curing shrinkage rate of the material, the smaller the elastic modulus of the material, and the smaller the curing shrinkage rate, the larger the elastic modulus of the material, in order to improve the deformation resistance of the first protection part 31 to the bending part 130 and the buffering effect of the second protection part 32 on the bending part 130, the curing shrinkage rate of the material of the first protection part 31 of the present application can be greater than the curing shrinkage rate of the second protection part 32, thereby improving the impact resistance of the edge of the display module 100 and improving the stability of the product.

[0090] It should be noted that the curing rate of the first protection part 31 is greater than that of the second protection part 32. Since the curing rate of a material is negatively correlated with its elastic modulus, in order to improve the first protection part 31's ability to resist deformation of the bending part 130 and the second protection part 32's buffering effect on the bending part 130, the present application can make the curing rate of the first protection part 31 greater than that of the second protection part 32, so that the elastic modulus of the first protection part 31 is less than that of the second protection part 32, thereby improving the impact resistance of the edge of the display module 100 and improving the stability of the product.

[0091] In this embodiment, the first protection part 31 is a heat-curing material, and the second protection part 32 is a heat-curing or light-curing material. Since the first protection part 31 is located in the enclosed space WTL, and the enclosed space WTL is a non-light-transmitting area, in order to completely cure the first protection part 31, the first protection part 31 of the present application needs to use a heat-curing material; at the same time, since the second protection part 32 is mainly used to buffer the bending part 130, the curing rate of the second protection part 32 of the present application is not limited, that is, the second protection part 32 of the present application can be a heat-curing material or a light-curing material.

[0092] In this embodiment, the main materials of the first protection portion 31 and the second protection portion 32 may be the same or different. For example, the main materials of the first protection portion 31 and the second protection portion 32 may be polymer materials such as epoxy system or acrylic system.

[0093] In this embodiment, the present application may dope different types and / or different quantities of particles into the corresponding main material, so that the elastic modulus of the first protection portion 31 and the second protection portion 32 are different.

[0094] It should be noted that the materials of the first protection part 31 and the second protection part 32 of the present application can be exactly the same, and in the subsequent curing process, the two can have different elastic moduli; or, the materials and elastic moduli of the first protection part 31 and the second protection part 32 of the present application can be the same, that is, they can be prepared using different processes.

[0095] It should be noted that in the process of the first protective material 31a filling the enclosed space WTL after being extruded by the bending portion 130, the first protective portion 31 material may remain in at least one of the edge gaps between the first body 110 and the first back panel 21 near the bending portion 130, the edge gaps between the first back panel 21 and the heat dissipation buffer layer 231 near the bending portion 130, the edge gaps between the heat dissipation buffer layer 231 and the filling glue layer 232 near the bending portion 130, the edge gaps between the filling glue layer 232 and the second back panel 22 near the bending portion 130, and the edge gaps between the second back panel 22 and the second body 120 near the bending portion 130.

[0096] It should be noted that, since the first protective material 31 a fills the enclosed space WTL after being squeezed by the bending portion 130 , the dispensing volume of the first protective material 31 a is related to the position of the interface between the first protective portion 31 and the second protective portion 32 .

[0097] Please refer to the attached Figure 7In order to make the first protective material 31a completely fill the enclosed space WTL, the present application can form more first protective material 31a on the surface of the bending portion 130 away from the light-emitting surface 10a, so that the first protective portion 31 completely fills the enclosed space WTL and overflows to the outside of the enclosed space WTL, and the interface between the first protective portion 31 and the second protective portion 32 is outside the enclosed space WTL.

[0098] Please refer to the attached Figure 8 structure, and when less first protective material 31a is formed on the surface of the bending portion 130 away from the light-emitting surface 10a, the first protective portion 31 cannot completely fill the enclosed space WTL, so that the subsequent second protective portion 32 will be embedded in the enclosed space WTL and contact with the first protective portion 31, that is, the interface between the first protective portion 31 and the second protective portion 32 is inside the enclosed space WTL.

[0099] Please refer to the attached Fig. 9 structure, and when an appropriate amount of first protective material 31a is formed on the surface of the bending portion 130 away from the light emitting surface 10a, the first protective portion 31 can completely fill the enclosed space WTL, and the first protective portion 31 does not overflow to the outside of the enclosed space WTL, that is, the interface between the first protective portion 31 and the second protective portion 32 is at the edge of the enclosed space WTL.

[0100] It should be noted that since the material of the first protecting portion 31 extends to at least one side of the enclosed space WTL after being squeezed by the bending portion 130, and since the first protecting portion 31 has the characteristics of a fluid, the boundary of the first protecting portion 31 is an arc surface, such as a convex spherical surface or a concave-convex curved surface, etc.; and the second protecting portion 32 matches the first protecting portion 31, so the interface between the first protecting portion 31 and the second protecting portion 32 is the same shape as the boundary of the first protecting portion 31.

[0101] It should be noted that, since the boundary of the first protection portion 31 is an arc surface, Fig. 9 The structure in the figure is only an ideal state, as long as the outer contour of the first protection portion 31 does not exceed the enclosed space WTL.

[0102] For the attached Figure 7 For details, please refer to Fig.11 The first protection portion 31 may include a first filling portion 311 and a first extending portion 312 connected to each other, the first filling portion 311 is located in the enclosed space WTL, and the first extending portion 312 is located outside the enclosed space WTL.

[0103] exist Fig.11In the structure, the material of the first protection portion 31 extends to at least one side of the enclosed space WTL after being squeezed by the bending portion 130, and the material of the first protection portion 31 located outside the enclosed space WTL is the first extension portion 312; Fig.12 In the structure, the second protective portion 32 can cover the bending portion 130, at least a portion of the first body 110 and at least a portion of the second body 120, and the second protective portion 32 is connected to the surface of the cover layer 50 close to the display panel 10, that is, the second protective portion 32 covers the first extension portion 312 to achieve the connection between the first protective portion 31 and the second protective portion 32.

[0104] It should be noted that Fig.11 The structure in is attached Fig.10 The enlarged view of area A or area B, that is, glue overflow occurs on only one edge of the two edges of the bending portion 130; or, glue overflow occurs on both area A and area B, which is not specifically limited in this application.

[0105] In this embodiment, the first extension portion 312 contacts the surface of the functional support layer 23 away from the first back plate 21. Fig.11 Since the functional support layer 23 includes a heat dissipation buffer layer 231 and a filling glue layer 232, and the orthographic projection of the filling glue layer 232 on the second body 120 is located inside the second body 120, after the first extension portion 312 overflows from the enclosed space WTL, the first extension portion 312 will contact the surface of the heat dissipation buffer layer 231 close to the filling glue layer 232, for example, the first extension portion 312 contacts the metal layer in the heat dissipation buffer layer 231.

[0106] In the display module 100 of the present application, a functional mark 231a is provided at the end of the functional support layer 23 close to the bending portion 130, and the functional mark 231a is spaced apart from the edge of the bending portion 130. The first extension portion 312 extends toward a side away from the enclosed space WTL, and the first extension portion 312 is spaced apart from the functional mark 231a.

[0107] See also Fig.11 In the die-cutting process of the heat dissipation buffer layer 231, it is necessary to set a functional mark 231a as the die-cutting cut-off point of the heat dissipation buffer layer 231. For example, the functional mark 231a can be a notch opened on the heat dissipation buffer layer 231. At the same time, the material of the first protection part 31 overflowing from the enclosed space WTL cannot be too much, resulting in too little material of the second protection part 32 in the area, affecting the buffering effect of the second protection part 32 in the area.

[0108] See also Figure 8The second protection portion 32 may include a second filling portion 321 and a second extending portion 322 connected to each other, the second filling portion 321 is located outside the enclosed space WTL, the second extending portion 322 is disposed within the enclosed space WTL, and the second extending portion 322 contacts an edge of the first protection portion 31 .

[0109] In this embodiment, the first protection part 31 cannot completely fill the enclosed space WTL. In the subsequent low-pressure and low-temperature in-mold injection molding process, part of the material of the second protection part 32 can fill the unfilled part of the enclosed space WTL, so that the interface between the first protection part 31 and the second protection part 32 is inside the enclosed space WTL.

[0110] In this embodiment, the volume proportion of the second extending portion 322 on one side in the enclosed space WTL is greater than 0 and less than or equal to 5%.

[0111] It should be noted that since most of the volume in the enclosed space WTL is filled by the first protection part 31, the air in the enclosed space WTL has been discharged. Therefore, even if the second protection part 32 subsequently fills the remaining space in the enclosed space WTL, there will be no bubbles remaining in the enclosed space WTL.

[0112] Please refer to the attached Figure 3 and attached Fig.13 , Figure 3 and Figure 2 Same or similar, except Figure 3 The cover layer 50 in the embodiment includes a planar portion 510 and a curved portion 520 located at the periphery of the planar portion 510 , and the curved portion 520 includes a plurality of side sub-portions 521 located at the periphery of the planar portion 510 and a corner sub-portion 522 located between two adjacent side sub-portions 521 .

[0113] In this embodiment, the second protection portion 32 is connected to at least the surface of the bending portion 130 away from the composite supporting layer 20 , and the side sub-portion 521 corresponding to the bending portion 130 and the adjacent corner sub-portion 522 .

[0114] In the display module 100 of the present application, the display module 100 further includes a driver chip IC disposed on a side of the second body 120 away from the first body 110 and a shielding film 122 covering the driver chip IC, and the driver chip IC is bound and connected to a binding terminal 121 in the second body 120 .

[0115] In this embodiment, the second protection portion 32 may cover the bending portion 130 and at least a portion of the second body 120, and in the direction from the bending portion 130 to the second body 120, the second protection portion 32 is spaced apart from the driver chip IC; for example Figure 2 The boundary of the second protection portion 32 does not exceed the boundary of the protective adhesive layer 80. Figure 3 The boundary of the second protection portion 32 may exceed the boundary of the protection glue layer 80 .

[0116] See also Fig.14 The protection member 30 further includes a third protection portion 33 connected to the second protection portion 32 . The second protection portion 32 and the third protection portion 33 form a closed annular structure, and the annular structure covers the periphery of the display panel 10 .

[0117] In this embodiment, in order to improve the impact resistance of the edge of the display module 100, the present application can set a protective material around the outer periphery of the display panel 10, and the materials of the second protection part 32 and the third protection part 33 can be the same and prepared in the same process; for example, in a low-pressure and low-temperature in-mold injection molding process, the edge of the display module 100 can be injected at the same time to form a second protection part 32 in the area where the bottom frame of the display module 100 is located, and to form a third protection part 33 in the area where the fixed frame, left frame and right frame of the display module 100 are located.

[0118] See also Fig.15 The present application also proposes a method for manufacturing a display module 100, comprising:

[0119] S10, providing a display panel 10, the display panel 10 includes a first body 110, a second body 120 and a bending portion 130 connecting the first body 110 and the second body 120, and a first supporting portion 20a is provided on a side of the first body 110 away from the light emitting surface 10a of the display module 100, and a second supporting portion 20b is provided on a side of the second body 120 away from the light emitting surface 10a.

[0120] S20, forming a first protective material 31a on a side of the bending portion 130 away from the light emitting surface 10a;

[0121] See also Figure 5 In the present application, before the display panel 10 is bent, a dispensing process can be used to form a first protective material 31a on the surface of the bending portion 130 away from the light emitting surface 10a of the display panel 10, and the first protective material 31a can be cured for the first time, i.e., pre-cured.

[0122] S30, bend the second body 120 to the side of the first body 110 away from the light emitting surface 10a, so that the surface of the first support portion 20a away from the first body 110 and the surface of the second support portion 20b away from the second body 120 are in contact, so that the first support portion 20a and the second support portion 20b constitute a composite support layer 20, and the first protective material 31a is located in the enclosed space WTL between the bent portion 130 and the first support portion 20a and the second support portion 20b;

[0123] S40, curing the first protective material 31a to form a first protective portion 31;

[0124] See also Figure 6 After the first protective material 31 a fills the enclosed space WTL, in order to improve the first protective material 31 a's ability to resist deformation of the bending portion 130 , the first protective material 31 a needs to be cured for a second time.

[0125] S50, forming a second protective material connected to the first protective portion 31 on the surface of the bending portion 130 away from the composite supporting layer 20, and curing the second protective material to form a second protective portion 32;

[0126] In this embodiment, the present application can use a low-pressure and low-temperature in-mold injection molding process, for example, in a vacuum environment, to form a second protective material connected to the first protective portion 31 on the surface of the bending portion 130 away from the composite support layer 20, and solidify the second protective material to form Figure 2 or Figure 3 structure.

[0127] In this embodiment, since the first protection portion 31 and the second protection portion 32 are formed by two different processes, the gelation rate of the first protection portion 31 and the gelation rate of the second protection portion 32 of the present application are different.

[0128] The present application also proposes a display device, which includes a middle frame and the above-mentioned display module, and the second protection part and the third protection part in the protective member can fill the area between the middle frame and the display module to improve the impact resistance of the display device in the edge area. The display device can include electronic devices such as mobile phones, televisions, and laptops.

[0129] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0130] The above is a detailed introduction to a display module and its manufacturing method, and a display device provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display module, characterized in that: include: Composite support layer; The display panel comprises a first body, a second body and a bending portion connecting the first body and the second body, wherein the first body is arranged on a first side of the composite support layer, and the second body is arranged on a second side of the composite support layer opposite to the first side; A protective member, comprising a first protective portion and a second protective portion connected to each other, wherein at least a portion of the first protective portion is located in the enclosed space between the bending portion and the composite supporting layer, and the second protective portion is connected to a surface of the bending portion away from the composite supporting layer; The gelation rate of the first protection portion is different from the gelation rate of the second protection portion.

2. The display module according to claim 1, characterized in that: The first protection portion includes a first filling portion and a first extending portion connected to each other, the first filling portion is located in the enclosed space, and the first extending portion is arranged outside the enclosed space.

3. The display module according to claim 2, characterized in that: The composite support layer comprises a first back plate, a second back plate and a functional support layer arranged between the first back plate and the second back plate, the first back plate is in contact with the first body, and the second back plate is in contact with the second body; Wherein, the first extension portion contacts a surface of the functional support layer on a side away from the first back plate.

4. The display module according to claim 3, characterized in that: A functional mark is provided at an end of the functional support layer close to the bending portion, and the functional mark is spaced apart from an edge of the bending portion; Wherein, the first extension portion extends toward a side away from the enclosed space, and the first extension portion is spaced apart from the functional mark.

5. The display module according to claim 1, characterized in that: The second protection portion includes a second filling portion and a second extending portion connected to each other, the second filling portion is located outside the enclosed space, the second extending portion is disposed in the enclosed space, and the second extending portion contacts an edge of the first protection portion.

6. The display module according to any one of claims 1 to 5, characterized in that: The first protection portion and the second protection portion are made of the same material.

7. The display module according to any one of claims 1 to 5, characterized in that: The elastic modulus of the first protecting portion is smaller than the elastic modulus of the second protecting portion.

8. The display module according to any one of claims 1 to 5, characterized in that: The curing rate of the first protection portion is greater than the curing rate of the second protection portion.

9. The display module according to any one of claims 1 to 5, characterized in that: The first protecting portion is a non-molded polymer and the second protecting portion is a molded polymer.

10. The display module according to claim 9, characterized in that: The first protection part is a heat-curing material, and the second protection part is a heat-curing or light-curing material.

11. The display module according to any one of claims 1 to 5, characterized in that: The interface between the first protection portion and the second protection portion is a curved surface.

12. The display module according to any one of claims 1 to 5, characterized in that: The display module further includes a driving chip electrically connected to the second body, and the driving chip is arranged on a side of the second body away from the first body; The second protection portion covers the bending portion and at least a portion of the second body, and in a direction from the bending portion to the second body, the second protection portion and the driving chip are spaced apart.

13. The display module according to any one of claims 1 to 5, characterized in that: The protection member further includes a third protection portion connected to the second protection portion, the second protection portion and the third protection portion form a closed annular structure, and the annular structure covers the periphery of the display panel.

14. The display module according to any one of claims 1 to 5, characterized in that: The display module further comprises a cover layer disposed on a side of the first body away from the composite support layer, the cover layer comprising a planar portion and a curved portion located outside the planar portion, and the curved portion comprises a plurality of side sub-portions located around the planar portion and a corner sub-portion located between two adjacent side sub-portions; The second protection portion is at least connected to a surface of the bending portion on a side away from the composite supporting layer, and the side sub-portion corresponding to the bending portion and the adjacent corner sub-portion.

15. A display device, characterized in that: The display device comprises the display module and the middle frame according to any one of claims 1 to 14, and the second protection portion in the protection member fills the area between the middle frame and the display panel.

16. A method for manufacturing a display module, characterized in that: include: A display panel is provided, the display panel comprising a first body, a second body and a bending portion connecting the first body and the second body, wherein a first supporting portion is provided on a side of the first body away from a light emitting surface of the display module, and a second supporting portion is provided on a side of the second body away from the light emitting surface; forming a first protective material on a side of the bent portion away from the light emitting surface; The second body is bent to the side of the first body away from the light emitting surface, so that the surface of the first supporting part away from the first body is in contact with the surface of the second supporting part away from the second body, so that the first supporting part and the second supporting part form a composite supporting layer, and the first protective material is located in the enclosed space between the bent part and the first supporting part and the second supporting part; curing the first protective material to form a first protective portion; forming a second protective material connected to the first protective portion on a surface of the bending portion away from the composite supporting layer, and curing the second protective material to form a second protective portion; The gelation rate of the first protection portion is different from the gelation rate of the second protection portion.

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