A display module, a preparation method thereof, and a display device

Abstract

The present application provides a display module, a preparation method thereof, and a display device. The display panel includes a first part and a second part located on one side of the backlight surface of the first part; a first sub-protective layer is disposed on the second part and includes a first protective film and a first fixing tape; a composite functional layer is located between the first sub-protective layer and the first part and includes a composite foam and a second fixing tape. The second fixing tape is adhered to the first fixing tape, and at least one side surface of the second fixing tape and each side surface of the first fixing tape are located in different planes; wherein, a first side surface of the first protective film and a second side surface of the first fixing tape are located in the same plane, and / or, a third side surface of the composite foam and a fourth side surface of the second fixing tape are located in the same plane. The present application can make the first fixing tape and the first protective film come in one piece, increasing the adhesiveness between the two, and / or, the second fixing tape and the composite foam come in one piece, increasing the adhesiveness between the two, thereby improving the structural reliability of the display module.

Description

Technical Field

[0001] This application relates to the field of display technologies, and in particular, to a display module, a preparation method thereof, and a display device.

Background Art

[0002] In recent years, narrow-border display panels have become the focus of research in the display field. Currently, the flexible characteristics of flexible display panels are mainly used to achieve narrow-border display. By bending the edge of the flexible display panel to the back of the main display area, the border width of the display panel is reduced, the screen-to-body ratio is increased, and thus narrow-border display is achieved.

[0003] In a display module assembled using a flexible display panel, after the flexible display panel is bent, it usually needs to be fixed by bonding with a support member using a fixing tape to prevent the bent portion from rebounding. However, in the prior art, the fixing tape has the problem of insufficient adhesion, which reduces the structural reliability of the display module. Therefore, a solution is urgently needed.

[0004]

Content of the Application

[0005] In view of this, embodiments of this application provide a display module, a preparation method thereof, and a display device to solve the above problems.

[0006] In a first aspect, an embodiment of this application provides a display module. The display module includes a display panel, a protective layer, and a composite functional layer. The display panel includes a first part and a second part connected to each other, and the second part is located on one side of the backlight surface of the first part; the protective layer is located between the first part and the second part, and the protective layer includes a first sub-protective layer. The first sub-protective layer is provided on the second part, and the first sub-protective layer includes a first protective film and a first fixing tape. The first fixing tape is located on the side of the first protective film facing the first part; the composite functional layer is located between the first part and the second part and on the side of the first sub-protective layer facing the first part. The composite functional layer includes a composite foam and a second fixing tape. The second fixing tape is located on the side of the composite foam facing the first sub-protective layer. The second fixing tape is bonded to the first fixing tape, and at least one side surface of the second fixing tape and each side surface of the first fixing tape are located in different planes; wherein, the first protective film includes a first side surface, the first fixing tape includes a second side surface, and the first side surface and the second side surface are located in the same plane; and / or, the composite foam includes a third side surface, the second fixing tape includes a fourth side surface, and the third side surface and the fourth side surface are located in the same plane.

[0007] In one implementation manner of the first aspect, along the thickness direction of the display module, the overlapping area between the composite foam and the first protective film is S1, and the overlapping area between the second fixing tape and the first fixing tape is S2, and S1 = S2.

[0008] In one implementation of the first aspect, at least one of the first fixing tape and the second fixing tape has a surface facing the other surface including a patterned structure.

[0009] In one implementation of the first aspect, the surface roughness of one of the first fixing tape and the second fixing tape is greater than that of the other.

[0010] In one implementation of the first aspect, the surface adhesion of the fixing tape with a larger surface roughness is less than that of the fixing tape with a smaller surface roughness among the first fixing tape and the second fixing tape.

[0011] In one implementation of the first aspect, the composite foam includes a foam layer and a metal layer. The metal layer is located on the side of the foam layer facing the first fixing tape, and the second fixing tape is disposed on the metal layer.

[0012] In a second aspect, an embodiment of the present application provides a method for manufacturing a display module for manufacturing the display module as provided in the first aspect. The manufacturing method includes:

[0013] Providing a display panel, preparing a composite functional layer on the first part side of the display panel, and preparing a first sub-protective layer on the second part side of the display panel;

[0014] Bonding the first fixing tape in the first sub-protective layer to the second fixing tape in the composite functional layer.

[0015] In one implementation of the second aspect, preparing the first sub-protective layer on the second part side of the display panel includes:

[0016] Providing a first protective film, disposing a first fixing tape on one side of the first protective film to form a first sub-protective layer;

[0017] Disposing the first sub-protective layer on the second part side.

[0018] In one implementation of the second aspect, preparing the composite functional layer on the first part side of the display panel includes:

[0019] Providing a composite foam, disposing a second fixing tape on one side of the composite foam to form a composite functional layer;

[0020] Disposing the composite functional layer on the first part side.

[0021] In a third aspect, an embodiment of the present application provides a display device including the display module as provided in the first aspect.

[0022] In the embodiments of the present application, the first fixing tape and the second fixing tape can be separately provided, making it possible for the first fixing tape and the first protective film to be supplied in one piece, and / or for the second fixing tape and the composite foam to be supplied in one piece. Thus, during the preparation process of the display module, the first fixing tape and the first protective film can be pre-attached, completely activating the attachment surface between the first fixing tape and the first protective film, and preventing residues generated by other processes from remaining between the bonding surfaces of the first fixing tape and the first protective film; and / or the second fixing tape and the composite foam can be pre-attached, completely activating the attachment surface between the second fixing tape and the composite foam, and preventing residues generated by other processes from remaining between the bonding surfaces of the second fixing tape and the composite foam. This is conducive to increasing the bonding reliability between the first protective film and the composite foam, and further conducive to increasing the structural reliability of the display module.

Description of the Drawings

[0023] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of a display module in the prior art;

[0025] Figure 2 It is a schematic structural diagram of a display module provided by an embodiment of the present application;

[0026] Figure 3 It is a schematic structural diagram of another display module provided by an embodiment of the present application;

[0027] Figure 4 It is a schematic structural diagram of another display module provided by an embodiment of the present application;

[0028] Figure 5 It is a schematic structural diagram of another display module provided by an embodiment of the present application;

[0029] Figure 6 It is a schematic plan view of a graphical structure related to the present application;

[0030] Figure 7 It is a schematic plan view of another graphical structure related to the present application;

[0031] Figure 8 It is a schematic diagram of another display module provided by an embodiment of the present application;

[0032] Figure 9 It is a schematic diagram of a display device provided by an embodiment of the present application.

Detailed Implementation Modes

[0033] For a better understanding of the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0035] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the", and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0036] It should be understood that the term " / and / " used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0037] In the description of this specification, it should be understood that the words such as "substantially", "approximately", "about", "around", "roughly", "generally" described in the claims and embodiments of the present application refer to what can be generally recognized within a reasonable process operation range or tolerance range, rather than an exact value.

[0038] It should be understood that although terms such as first and second may be used in the embodiments of the present application to describe the fixing tape, sub-protective layer, side surface, bonding surface, etc., the fixing tape, sub-protective layer, side surface, bonding surface, etc. should not be limited to these terms. These terms are only used to distinguish the fixing tape, sub-protective layer, side surface, bonding surface, etc. from each other. For example, without departing from the scope of the embodiments of the present application, the first fixing tape may also be referred to as the second fixing tape, and similarly, the second fixing tape may also be referred to as the first fixing tape.

[0039] Figure 1 It is a schematic structural diagram of a display module in the prior art.

[0040] In the existing display module 01', as Figure 1As shown in the figure, the display module 01' includes a display panel 10', a protective film 20', a support layer 30' and a fixing tape 40'. Among them, the display panel 10' includes a first part 11', a bending part 12' and a second part 13' connected in sequence. The first part 11' may include the main display area of the display panel 10', and the second part 13' is located on one side of the backlight surface of the first part 11'.

[0041] That is to say, the second part 13' of the display panel 10' can be bent to the backlight side of the first part 11', so as to reduce the frame width of the display panel 10', improve the screen-to-body ratio of the main display area, and further achieve the narrow-frame display of the display panel 10'.

[0042] The protective film 20' is located between the first part 11' and the second part 13' of the display panel 10'. The protective film 20' includes a first protective film 21' and a second protective film 22'. The first protective film 21' can be attached to the surface of the second part 13' facing the first part 11' (the back of the second part 13'), and the second protective film 22' can be attached to the surface of the first part 11' facing the second part 13' (the back of the first part 11') to protect the back of the display panel 10' and prevent scratches.

[0043] The support layer 30' is located between the first protective film 21' and the second protective film 22' and is used to support and fix the display panel 10'. The support layer 30' may include a metal structure.

[0044] Among them, the fixing tape 40' is arranged between the support layer 30' and the first protective film 21' and is used to bond the first protective film 21' and the support layer 30'.

[0045] Specifically, the fixing tape 40' is an integral structure. One side of it is bonded to the metal structure in the support layer 30', and the other side is bonded to the first protective film 21', so as to fix the second part 13' of the display panel 10' and prevent the bending part 12' of the display panel 10' from causing the second part 13' to rebound.

[0046] The inventors of this application have found through research that in the existing display module 01', as the bending radius of the display panel 10' becomes smaller and smaller, the thickness of the fixing tape 40' becomes thinner and the viscosity becomes smaller. Moreover, during the preparation process of the display module 01', the fixing tape 40' usually comes in separately. When setting the fixing tape 40', residues generated by other processes are likely to remain on the surface of the metal structure in the support layer 30' and the surface of the first protective film 21', which affects the viscosity of the fixing tape 40', resulting in the easy detachment of the bonding part between the first protective film 21' and the support layer 30', reducing the structural reliability of the display module 01', and further reducing the product yield and service life of the display module 01'.

[0047] Through careful and in-depth research, the applicant of this case has provided a solution to the problems existing in the prior art.

[0048] Figure 2 It is a schematic structural diagram of a display module provided by an embodiment of this application. Figure 3 It is another schematic structural diagram of a display module provided by an embodiment of this application. Figure 4 It is another schematic structural diagram of a display module provided by an embodiment of this application.

[0049] An embodiment of this application provides a display module 01. As Figures 2 - 4 shown, the display module 01 includes a display panel 10, a protective layer 20, and a composite functional layer 30. Among them, the display panel 10 includes a connected first part 11, a second part 12, and a bent part 13 located between the first part 11 and the second part 12. The first part 11 may include the main display area of the display panel 10, and the second part 12 is located on one side of the backlight surface of the first part 11.

[0050] That is to say, the second part 12 of the display panel 10 can be bent to the backlight side of the first part 11, so as to reduce the frame width of the display panel 10, increase the proportion of the display area, and further facilitate the realization of narrow-frame display of the display panel 10.

[0051] The protective layer 20 is located between the first part 11 and the second part 12 of the display panel 10. The protective layer 20 includes a first sub-protective layer 21, and the first sub-protective layer 21 is provided on the second part 12. The first sub-protective layer 21 includes a first protective film 211 and a first fixing tape 212, and the first fixing tape 212 is located on the side of the first protective film 211 facing the first part 11.

[0052] Specifically, the first protective film 211 may be provided on the surface of the second part 12 facing the first part 11 to protect the surface of the second part 12 facing the first part 11 from being scratched. The first fixing tape 212 may be provided on the surface of the first protective film 211 facing the first part 11.

[0053] During the preparation process of the display module 01, the first fixing tape 212 and the first protective film 211 may be provided in one piece. That is, the first fixing tape 212 may be prepared on the first protective film 211 first, and then the whole composed of the first protective film 211 and the first fixing tape 212 is provided on the second part 12 of the display panel 10. Of course, the first fixing tape 212 is located on the side of the first protective film 211 away from the second part 12.

[0054] In addition, please continue to refer to Figures 2 - 4, the protective layer 20 further includes a second sub-protective layer 22, and the second sub-protective layer 22 is disposed on the first portion 11 of the display panel 10. Specifically, the second sub-protective layer 22 can be attached to the surface of the first portion 11 facing the second portion 12 for protecting the backlight surface of the first portion 11 against scratches.

[0055] The composite functional layer 30 is located between the first portion 11 and the second portion 12 of the display panel 10 and on the side of the first sub-protective layer 21 facing the first portion 11. Specifically, the composite functional layer 30 can be located between the first sub-protective layer 21 and the second sub-protective layer 22 for supporting the display panel 10. In addition, the composite functional layer 30 can also have functions such as buffering and heat dissipation.

[0056] The composite functional layer 30 includes a composite foam 31 and a second fixing tape 32. The second fixing tape 32 is located on the side of the composite foam 31 facing the first sub-protective layer 21. The second fixing tape 32 is bonded to the first fixing tape 212 in the first sub-protective layer 21, and at least one side surface of the second fixing tape 32 and each side surface of the first fixing tape 212 are located in different planes, so that the first protective film 211 and the composite foam 31 can be bonded together, and then the second portion 12 of the display panel 10 can be firmly fixed on the composite foam 31 to prevent the bent portion 13 of the display panel 10 from causing the second portion 12 to rebound. Moreover, at least one side surface of the second fixing tape 32 and each side surface of the first fixing tape 212 are located in different planes, which can ensure that the first fixing tape 212 and the second fixing tape 32 are separately arranged.

[0057] Specifically, the second fixing tape 32 can be disposed on the surface of the composite foam 31 facing the first sub-protective layer 21.

[0058] During the preparation process of the display module 01, the second fixing tape 32 can be provided together with the composite foam 31, that is, the second fixing tape 32 can be first prepared on the composite foam 31, and then the whole formed by the composite foam 31 and the second fixing tape 32 is disposed on the first portion 11 of the display panel 10. Of course, the second fixing tape 32 is located on the side of the composite foam 31 away from the first portion 11.

[0059] Wherein, the first protective film 211 includes a first side surface 211A, the first fixing tape 212 includes a second side surface 212A, and the first side surface 211A and the second side surface 212A are located in the same plane; and / or, the composite foam 31 includes a third side surface 31A, the second fixing tape 32 includes a fourth side surface 32A, and the third side surface 31A and the fourth side surface 32A are located in the same plane.

[0060] That is to say, in the display module 01, at least one side of the first fixing tape 212 can be set to be aligned with the side of the first protective film 211. As Figure 2 shown, the second side 212A of the first fixing tape 212 is aligned with the first side 211A of the first protective film 211; or at least one side of the second fixing tape 32 can be set to be aligned with the side of the composite foam 31. As Figure 3 shown, the fourth side 32A of the second fixing tape 32 is aligned with the third side 31A of the composite foam 31; or both at least one side of the first fixing tape 212 is set to be aligned with the side of the first protective film 211 and at least one side of the second fixing tape 32 is set to be aligned with the side of the composite foam 31. As Figure 4 shown, the second side 212A of the first fixing tape 212 is aligned with the first side 211A of the first protective film 211, and the fourth side 32A of the second fixing tape 32 is aligned with the third side 31A of the composite foam 31.

[0061] It should be noted that Figures 2 - 4 it is only used to represent the alignment relationship between the first side 211A and the second side 212A, and the alignment relationship between the third side 31A and the fourth side 32A, and does not represent the specific positions of the first side 211A, the second side 212A, the third side 31A, and the fourth side 32A.

[0062] In the embodiment of the present application, the first fixing tape 212 and the second fixing tape 32 are separately arranged, and the second side 212A of the first fixing tape 212 is aligned with the first side 211A of the first protective film 211. Then, the first fixing tape 212 can be integrally prepared with the first protective film 211 and supplied in one piece during the preparation process of the display module 01.

[0063] In this way, the first fixing tape 212 can be pre-attached to the first protective film 211, so that the attachment surface between the first fixing tape 212 and the first protective film 211 is fully activated, thereby increasing the reliability of the adhesion between the first fixing tape 212 and the first protective film 211. Moreover, setting the first fixing tape 212 to be integrally prepared with the first protective film 211 can also prevent residues generated by other processes from remaining between the adhesion surfaces of the first fixing tape 212 and the first protective film 211, which is beneficial to further increasing the reliability of the adhesion between the first fixing tape 212 and the first protective film 211, and further beneficial to improving the reliability of the adhesion between the first protective film 211 and the composite functional layer 30, and increasing the structural reliability of the display module 01.

[0064] The first fixing tape 212 and the second fixing tape 32 are separately arranged, and the fourth side 32A of the second fixing tape 32 is aligned with the third side 31A of the composite foam 31. Then, the second fixing tape 32 can be integrally prepared with the composite foam 31 and supplied in one piece during the preparation process of the display module 01.

[0065] In this way, the second fixing tape 32 can be pre-attached to the composite foam 31, so that the attachment surface between the second fixing tape 32 and the composite foam 31 is fully activated, thereby increasing the bonding reliability between the second fixing tape 32 and the composite foam 31. Moreover, setting the second fixing tape 32 to be integrally prepared with the composite foam 31 can also prevent residues generated by other processes from remaining between the bonding surfaces of the second fixing tape 32 and the composite foam 31, which is beneficial to further increasing the bonding reliability between the second fixing tape 32 and the composite foam 31, and further beneficial to improving the bonding reliability between the composite foam 31 and the first sub-protective layer 21, and increasing the structural reliability of the display module 01.

[0066] The first fixing tape 212 and the second fixing tape 32 are separately arranged. At the same time, the second side 212A of the first fixing tape 212 is aligned with the first side 211A of the first protective film 211, and the fourth side 32A of the second fixing tape 32 is aligned with the third side 31A of the composite foam 31. Then, the first fixing tape 212 can be integrally prepared with the first protective film 211, and the second fixing tape 32 can be integrally prepared with the composite foam 31, which is beneficial to simultaneously increasing the bonding reliability between the first fixing tape 212 and the first protective film 211, and the bonding reliability between the second fixing tape 32 and the composite foam 31, and further beneficial to increasing the structural reliability of the display module 01.

[0067] Please continue to refer to Figure 4 In an embodiment of the present application, along the thickness direction Z of the display module 01, the overlapping area between the composite foam 31 and the first protective film 211 is S1, and the overlapping area between the second fixing tape 32 and the first fixing tape 212 is S2, and S1 = S2.

[0068] It can be understood that in the thickness direction Z of the display module 01, the overlapping area between the composite foam 31 and the first protective film 211 is the maximum area where the two can be bonded to each other.

[0069] In the embodiment of the present application, setting S1 = S2 can maximize the bonding area between the second fixing tape 32 and the first fixing tape 212, which is beneficial to increasing the bonding reliability between the second fixing tape 32 and the first fixing tape 212, and further beneficial to increasing the bonding reliability between the composite foam 31 and the first protective film 211, and further improving the structural reliability of the display module 01.

[0070] Figure 5 This is a schematic structural diagram of another display module provided by an embodiment of the present application. Figure 6 This is a schematic plan view of a patterned structure related to the present application. Figure 7 This is a schematic plan view of another patterned structure related to the present application.

[0071] In an embodiment of the present application, at least one of the first fixing tape 212 and the second fixing tape 32 has a patterned structure on the surface facing the other.

[0072] That is to say, a patterned structure can be provided only on the surface of the first fixing tape 212 facing the second fixing tape 32; or only on the surface of the second fixing tape 32 facing the first fixing tape 212; or a patterned structure is provided both on the surface of the first fixing tape 212 facing the second fixing tape 32 and on the surface of the second fixing tape 32 facing the first fixing tape 212, and the patterned structure on the first fixing tape 212 can be interlocked with the patterned structure on the second fixing tape 32. Of course, the surface of the first fixing tape 212 facing the second fixing tape 32 and the surface of the second fixing tape 32 facing the first fixing tape 212 are the bonding surfaces where the two are bonded.

[0073] Exemplarily, as Figure 5 shown, a patterned structure M is provided on the surface of the first fixing tape 212 facing the second fixing tape 32. When the first fixing tape 212 is bonded to the second fixing tape 32, the glue on the second fixing tape 32 can be embedded into the patterned structure M.

[0074] Optionally, as Figure 6 and Figure 7 shown, the patterned structure M is a grid-like structure.

[0075] In an embodiment of the present application, by providing the patterned structure M on at least one of the bonding surfaces of the first fixing tape 212 and the second fixing tape 32, when the first fixing tape 212 is bonded to the second fixing tape 32, the glue can be embedded into the patterned structure M, thereby increasing the bonding area between the first fixing tape 212 and the second fixing tape 32, which is beneficial to further increasing the bonding reliability between the first fixing tape 212 and the second fixing tape 32, and further beneficial to increasing the bonding reliability between the first protective film 211 and the composite foam 31.

[0076] In an embodiment of the present application, the surface roughness of one of the first fixing tape 212 and the second fixing tape 32 is greater than that of the other. Here, the surface refers to the bonding surface where the first fixing tape 212 and the second fixing tape 32 are bonded to each other.

[0077] For example, asFigure 4 As shown, the surface of the first fixing tape 212 for bonding with the second fixing tape 32 is the first bonding surface 212B, and the surface of the second fixing tape 32 for bonding with the first fixing tape 212 is the second bonding surface 32B. The roughness of the first bonding surface 212B is greater than that of the second bonding surface 32B.

[0078] In the embodiment of the present application, if the roughness of the bonding surface of one of the first fixing tape 212 and the second fixing tape 32 is relatively large, when the first fixing tape 212 is bonded to the second fixing tape 32, the glue can be embedded into the surface with relatively large roughness, thereby increasing the bonding area between the first fixing tape 212 and the second fixing tape 32, which is beneficial to further increasing the bonding reliability between the first fixing tape 212 and the second fixing tape 32, and further beneficial to increasing the bonding reliability between the first protective film 211 and the composite foam 31.

[0079] In an embodiment of the present application, among the first fixing tape 212 and the second fixing tape 32, the surface tackiness of the one with a larger surface roughness is less than that of the one with a smaller surface roughness.

[0080] Optionally, among the first fixing tape 212 and the second fixing tape 32, the surface of the one with a larger surface roughness has no tackiness, and the surface of the one with a smaller surface roughness has tackiness. Of course, the surface in the embodiment of the present application still refers to the bonding surface where the first fixing tape 212 and the second fixing tape 32 are bonded to each other.

[0081] For example, please continue to refer to Figure 4 , the roughness of the first bonding surface 212B in the first fixing tape 212 is greater than that of the second bonding surface 32B in the second fixing tape 32, and the tackiness of the first bonding surface 212B is less than that of the second bonding surface 32B. Of course, it can be set that the first bonding surface 212B has no tackiness and the second bonding surface 32B has tackiness.

[0082] It can be understood that the bonding property between a glue surface with relatively large tackiness and a rough surface with relatively small tackiness is usually better than that between two glue surfaces with comparable tackiness.

[0083] The embodiment of the present application can further increase the bonding reliability between the first fixing tape 212 and the second fixing tape 32, which is beneficial to further increasing the bonding reliability between the first protective film 211 and the composite foam 31, and further beneficial to improving the structural reliability of the display module 01.

[0084] Figure 8 It is a schematic diagram of another display module provided by the embodiment of the present application.

[0085] As Figure 8As shown, in an embodiment of the present application, the composite foam 31 includes a foam layer 311 and a metal layer 312. The metal layer 312 is located on the side of the foam layer 311 facing the first fixing tape 212, and the second fixing tape 32 is provided on the metal layer 312.

[0086] Specifically, the second fixing tape 32 can be attached to the surface of the metal layer 312 facing the first fixing tape 212.

[0087] Optionally, please continue to refer to Figure 8 , in the composite foam 31, a polyimide PI can also be provided between the foam layer 311 and the metal layer 312.

[0088] In the embodiment of the present application, by providing the foam layer 311 and the metal layer 312 in the composite foam 31, it is beneficial to ensure that the composite foam 31 functions as support, buffering, and heat dissipation in the display module 01. Moreover, by arranging the metal layer 312 on the side of the foam layer 311 facing the first fixing tape 212, that is, the metal layer 312 is relatively close to the second part 12 of the display panel 10, it is beneficial to improve the heat dissipation effect of the driving circuit board bonded to the second part 12 of the display panel 10.

[0089] In addition, by arranging the second fixing tape 32 on the metal layer 312, it is beneficial to maximize the total thickness of the second fixing tape 32 and the first fixing tape 212, thereby further increasing the bonding reliability between the composite foam 31 and the first protective film 211 and enhancing the structural reliability of the display module 01.

[0090] The embodiment of the present application also provides a preparation method for the display module 01, which is used to prepare the display module 01 provided in the above embodiment. The structure of the display module 01 can be as Figures 2 - 5 , Figure 8 shown. The preparation method includes:

[0091] Step S1: Provide a display panel 10, prepare a composite functional layer 30 on the side of the first part 11 of the display panel 10, and prepare a first sub-protective layer 21 on the side of the second part 12 of the display panel 10.

[0092] Step S2: Bond the first fixing tape 212 in the first sub-protective layer 21 to the second fixing tape 32 in the composite functional layer 30.

[0093] In the manufacturing method provided by the embodiments of the present application, the first fixing tape 212 and the second fixing tape 32 can be separately arranged. Thus, it becomes possible for the first fixing tape 212 and the first protective film 211 to be supplied in one piece, and / or for the second fixing tape 32 and the composite foam 31 to be supplied in one piece. Therefore, during the manufacturing process of the display module 01, the first fixing tape 212 and the first protective film 211 can be attached in advance, the attachment surface of the first fixing tape 212 and the first protective film 211 can be fully activated, and residues generated by other processes can be prevented from remaining between the bonding surfaces of the first fixing tape 212 and the first protective film 211; and / or the second fixing tape 32 and the composite foam 31 can be attached in advance, the attachment surface of the second fixing tape 32 and the composite foam 31 can be fully activated, and residues generated by other processes can be prevented from remaining between the bonding surfaces of the second fixing tape 32 and the composite foam 31. This is beneficial to increasing the bonding reliability between the first protective film 211 and the composite foam 31, and further beneficial to increasing the structural reliability of the display module 01.

[0094] Specifically, in step S1 above, preparing the first sub-protective layer 21 on the second part 12 side of the display panel 10 includes:

[0095] Step B1: Provide the first protective film 211, and arrange the first fixing tape 212 on one side of the first protective film 211 to form the first sub-protective layer 21.

[0096] Step B2: Arrange the first sub-protective layer 21 on the second part 12 side.

[0097] Of course, the first fixing tape 212 is located on the side of the first protective film 211 away from the second part 12.

[0098] In this way, it can be ensured that during the manufacturing process of the display module 01, the first fixing tape 212 and the first protective film 211 can be supplied in one piece, thereby increasing the bonding reliability between the first fixing tape 212 and the first protective film 211, and further increasing the bonding reliability between the first protective film 211 and the composite foam 31.

[0099] In step S1 above, preparing the composite functional layer 30 on the first part 11 side of the display panel 10 includes:

[0100] Step B3: Provide the composite foam 31, and arrange the second fixing tape 32 on one side of the composite foam 31 to form the composite functional layer 30.

[0101] Step B4: Arrange the composite functional layer 30 on the first part 11 side.

[0102] Of course, the second fixing tape 32 is located on the side of the composite foam 31 away from the first part 11.

[0103] In this way, it can be ensured that during the preparation process of the display module 01, the second fixing tape 32 and the composite foam 31 can be provided together, thereby increasing the bonding reliability between the second fixing tape 32 and the composite foam 31, and further increasing the bonding reliability between the first protective film 211 and the composite foam 31.

[0104] Figure 9 Schematic diagram of a display device provided by an embodiment of the present application.

[0105] An embodiment of the present application provides a display device 02, as Figure 9 shown, the display device 02 includes the display module 01 provided in the above embodiment. Exemplarily, the display device 02 provided by the embodiment of the present application may be an electronic device such as a computer, a television, a mobile phone, a vehicle-mounted display, etc., and the present application does not make specific limitations.

[0106] In the display device 02, the first fixing tape 212 and the second fixing tape 32 can be separately provided, making it possible that the first fixing tape 212 and the first protective film 211 are provided together, and / or the second fixing tape 32 and the composite foam 31 are provided together. Thus, during the preparation process of the display device 02, the first fixing tape 212 and the first protective film 211 can be attached in advance, completely activating the attachment surface of the first fixing tape 212 and the first protective film 211, and avoiding residues generated by other processes from remaining between the bonding surfaces of the first fixing tape 212 and the first protective film 211; and / or the second fixing tape 32 and the composite foam 31 can be attached in advance, completely activating the attachment surface of the second fixing tape 32 and the composite foam 31, and avoiding residues generated by other processes from remaining between the bonding surfaces of the second fixing tape 32 and the composite foam 31, which is beneficial to increasing the bonding reliability between the first protective film 211 and the composite foam 31, and further beneficial to increasing the structural reliability of the display device 02.

[0107] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.

Claims

1. A display module, characterized in that: The display module includes: The display panel comprises a first portion and a second portion connected to each other, wherein the second portion is located on one side of a backlight surface of the first portion; a protective layer located between the first portion and the second portion, the protective layer comprising a first sub-protective layer disposed on the second portion, the first sub-protective layer comprising a first protective film and a first fixing tape, the first fixing tape being located on a side of the first protective film facing the first portion; a composite functional layer located between the first portion and the second portion and on a side of the first sub-protective layer facing the first portion, the composite functional layer comprising a composite foam and a second fixing tape, the second fixing tape being located on a side of the composite foam facing the first sub-protective layer, the second fixing tape being bonded to the first fixing tape, and at least one side surface of the second fixing tape being located on a different plane from each side surface of the first fixing tape; In which, the first protective film includes a first side, the first fixing tape includes a second side, and the first side and the second side are located in the same plane; and / or, the composite foam includes a third side, the second fixing tape includes a fourth side, and the third side and the fourth side are located in the same plane.

2. The display module according to claim 1, wherein: Along the thickness direction of the display module, the overlapping area between the composite foam and the first protective film is S1, and the overlapping area between the second fixing tape and the first fixing tape is S2, where S1 = S2.

3. The display module according to claim 1, wherein: A surface of at least one of the first fixing tape and the second fixing tape facing the other includes a patterned structure.

4. The display module according to claim 1, wherein: The surface roughness of one of the first fixing tape and the second fixing tape is greater than the surface roughness of the other.

5. The display module according to claim 4, wherein: The first fixing tape and the second fixing tape have a surface with a larger surface roughness and a lower surface viscosity than the surface with a smaller surface roughness.

6. The display module according to claim 1, wherein: The composite foam includes a foam layer and a metal layer. The metal layer is located on a side of the foam layer facing the first fixing tape, and the second fixing tape is arranged on the metal layer.

7. A method for preparing a display module, characterized in that: Used to prepare the display module according to any one of claims 1 to 6; The preparation method comprises: Providing the display panel, preparing the composite functional layer on the first portion side of the display panel, and preparing the first sub-protective layer on the second portion side of the display panel; The first fixing tape in the first sub-protective layer is bonded to the second fixing tape in the composite functional layer.

8. The preparation method according to claim 7, characterized in that The step of preparing the first sub-protective layer on the second portion side of the display panel includes: Providing the first protective film, and disposing the first fixing tape on one side of the first protective film to form the first sub-protective layer; The first sub-protecting layer is disposed on the second portion side.

9. The preparation method according to claim 7, characterized in that The step of preparing the composite functional layer on the first portion side of the display panel comprises: Providing the composite foam, and disposing the second fixing tape on one side of the composite foam to form the composite functional layer; The composite functional layer is disposed on the first portion side.

10. A display device, characterized in that: Comprising the display module according to any one of claims 1-6.

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