A curved surface display module and a preparation method thereof

Abstract

The present invention provides a curved display module and a preparation method. Based on a composite tape having a first adhesive layer and a second adhesive layer, since in the first state, the first adhesive layer can be attached to the flat region and the second adhesive layer cannot be attached to the arc surface region, during the attachment process of the composite tape and the curved display panel, obviously the first adhesive layer first attaches to the flat region. At this time, the second adhesive layer cannot be attached to the arc surface region, thereby avoiding bubbles generated by the premature contact of the adhesive layer with the arc surface region. After that, after the first adhesive layer is attached to the flat region, a treatment is performed to enable the second adhesive layer to be attached to the arc surface region in the second state, realizing the attachment of the arc surface region and the second adhesive layer. Thus, the perfect attachment of the adhesive layer and the curved display panel is completed without generating bubbles, thereby improving the attachment effect of the composite tape and the curved display panel.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and more particularly, to a curved display module and a manufacturing method thereof. Background Art

[0002] Organic Light-Emitting Diode (OLED) display panels have gradually been applied to display devices due to their advantages such as low power consumption, high color saturation, wide viewing angles, thin thickness, and flexibility.

[0003] In existing curved display modules, a composite tape is usually included on the backlight side of the curved display module to protect the curved display panel in the curved display module.

[0004] However, currently, during the process of attaching the composite tape to the curved display module, since the composite tape comes into contact and adheres to the arc surface area of the curved display panel in advance, air bubbles are generated after the composite tape is attached, and the air bubbles cannot be discharged, ultimately resulting in a poor attachment effect of the composite tape. Summary of the Invention

[0005] In view of this, to solve the above problems, the present invention provides a curved display module and a manufacturing method thereof, and the technical solutions are as follows:

[0006] A curved display module, the curved display module comprising:

[0007] A curved cover plate;

[0008] A curved display panel located on one side of the curved cover plate, the curved display panel including a planar area and an arc surface area;

[0009] A composite tape located on the side of the curved display panel away from the curved cover plate, the composite tape including an adhesive layer, and the adhesive layer includes a first adhesive layer attached to the planar area and a second adhesive layer attached to the arc surface area;

[0010] Wherein, in a first state, the first adhesive layer is attached to the planar area, and the second adhesive layer is not attached to the arc surface area; in a second state, the first adhesive layer is attached to the planar area, and the second adhesive layer is attached to the arc surface area.

[0011] A manufacturing method of a curved display module for manufacturing the above-mentioned curved display module, the manufacturing method comprising:

[0012] Provide a basic structure and a composite tape of a curved display module, wherein the basic structure comprises a curved cover plate, a curved display panel located on one side of the curved cover plate, and the curved display panel comprises a flat area and a curved area; the composite tape comprises an adhesive layer, and the adhesive layer comprises a first adhesive layer bonded to the flat area and a second adhesive layer bonded to the curved area;

[0013] Laminating the first adhesive layer to the planar area in a first state;

[0014] In the second state, the second adhesive layer is bonded to the curved surface area.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] A curved display module provided by the present invention includes: a curved cover plate; a curved display panel located on one side of the curved cover plate, the curved display panel including a flat area and a curved area; a composite tape located on the side of the curved display panel away from the curved cover plate, the composite tape including an adhesive layer, the adhesive layer including a first adhesive layer bonded to the flat area and a second adhesive layer bonded to the curved area; wherein, in a first state, the first adhesive layer is bonded to the flat area, and the second adhesive layer is not bonded to the curved area; in a second state, the first adhesive layer is bonded to the flat area, and the second adhesive layer is bonded to the curved area.

[0017] Based on the composite tape having a first adhesive layer and a second adhesive layer, since the first adhesive layer can be bonded to the flat area in the first state, and the second adhesive layer cannot be bonded to the curved area, then in the bonding process of the composite tape and the curved display panel, it is obvious that the first adhesive layer is first bonded to the flat area, and the second adhesive layer cannot be bonded to the curved area at this time, thereby avoiding bubbles produced by the adhesive layer contacting the curved area in advance; thereafter, after the first adhesive layer and the flat area are bonded, the processing is performed so that the second adhesive layer can be bonded to the curved area in the second state, thereby realizing the bonding of the curved area and the second adhesive layer, and thus the adhesive layer and the curved display panel are perfectly bonded without generating bubbles, thereby improving the bonding effect between the composite tape and the curved display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 Partial structural schematic diagram of a curved display module provided by an embodiment of the present invention;

[0020] Figure 2 Partial cross-sectional schematic diagram of a composite tape provided by an embodiment of the present invention;

[0021] Figure 3 Partial structural schematic diagram during the process of attaching a composite tape to a curved display module provided by an embodiment of the present invention;

[0022] Figure 4 Schematic diagram of the attachment of the composite tape and the curved display panel during the conversion process from a first state to a second state provided by an embodiment of the present invention;

[0023] Figure 5 Partial structural schematic diagram of another curved display module provided by an embodiment of the present invention;

[0024] Figure 6 Partial cross-sectional schematic diagram of another composite tape provided by an embodiment of the present invention;

[0025] Figure 7 Partial structural schematic diagram of yet another curved display module provided by an embodiment of the present invention;

[0026] Figure 8 Partial cross-sectional schematic diagram of yet another composite tape provided by an embodiment of the present invention;

[0027] Figure 9 Partial structural schematic diagram of yet another curved display module provided by an embodiment of the present invention;

[0028] Figure 10 Partial cross-sectional schematic diagram of yet another composite tape provided by an embodiment of the present invention;

[0029] Figure 11 Partial structural schematic diagram of yet another curved display module provided by an embodiment of the present invention;

[0030] Figure 12 Partial cross-sectional schematic diagram of yet another composite tape provided by an embodiment of the present invention;

[0031] Figure 13 Partial structural schematic diagram of yet another curved display module provided by an embodiment of the present invention;

[0032] Figure 14 Partial structural schematic diagram of yet another curved display module provided by an embodiment of the present invention;

[0033] Figure 15 Flow schematic diagram of a preparation method of a curved display module provided by an embodiment of the present invention;

[0034] Figure 16 Schematic flow chart of another method for manufacturing a curved display module provided by an embodiment of the present invention;

[0035] Figure 17 Schematic diagram of the effect of bonding a first bonding layer to a planar region provided by an embodiment of the present invention;

[0036] Figure 18 Schematic flow chart of yet another method for manufacturing a curved display module provided by an embodiment of the present invention;

[0037] Figure 19 Schematic diagram of the effect of bonding a second bonding layer to a curved surface region provided by an embodiment of the present invention. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0040] Refer to Figure 1 , Figure 1 Partial structural schematic diagram of a curved display module provided by an embodiment of the present invention; refer to Figure 2 , Figure 2 Partial cross-sectional schematic diagram of a composite tape provided by an embodiment of the present invention.

[0041] The curved display module includes: a curved cover plate 11.

[0042] A curved display panel 12 located on one side of the curved cover plate 11, and the curved display panel 12 includes a planar region AA and a curved surface region BB.

[0043] A composite tape 13 located on the side of the curved display panel 12 facing away from the curved cover plate 11, the composite tape 13 includes a bonding layer 14, and the bonding layer 14 includes a first bonding layer 141 that fits with the planar region AA and a second bonding layer 142 that fits with the curved surface region BB.

[0044] Among them, in the first state, the first adhesive layer 141 is attached to the planar region AA, and the second adhesive layer 142 is not attached to the arc surface region BB; in the second state, the first adhesive layer 141 is attached to the planar region AA, and the second adhesive layer 142 is attached to the arc surface region BB.

[0045] Specifically, in the embodiment of the present invention, one side of the curved surface cover plate 11 is the light-emitting side of the curved surface display module, and the curved surface cover plate 11 includes, but is not limited to, a curved surface cover plate made of materials such as glass.

[0046] In the embodiment of the present invention, the fact that the first adhesive layer 141 is attached to the planar region AA in the first state can be understood as: in the first state, the first adhesive layer 141 has adhesiveness, and this adhesiveness can make the first adhesive layer 141 attached to the planar region AA.

[0047] In the embodiment of the present invention, the fact that the second adhesive layer 142 is not attached to the arc surface region BB in the first state can be understood as: in the first state, the second adhesive layer 142 does not have adhesiveness, or the adhesiveness of the second adhesive layer 142 is extremely small, and this adhesiveness cannot make the second adhesive layer 142 attached to the arc surface region BB either.

[0048] In the embodiment of the present invention, the fact that the first adhesive layer 141 is attached to the planar region AA in the second state can be understood as: in the second state, the first adhesive layer 141 has adhesiveness, and this adhesiveness can make the first adhesive layer 141 attached to the planar region AA.

[0049] In the embodiment of the present invention, the fact that the second adhesive layer 142 is attached to the arc surface region BB in the second state can be understood as: in the second state, the second adhesive layer 142 has adhesiveness, and this adhesiveness can make the second adhesive layer 142 attached to the arc surface region BB.

[0050] It can be seen from this that based on the composite tape 13 having the first adhesive layer 141 and the second adhesive layer 142, referring to Figure 3 , Figure 3It is a partial structural schematic diagram during the process of laminating a composite tape on a curved display module provided by an embodiment of the present invention. Since the first adhesive layer 141 has adhesiveness in the first state and can be adhered to the planar region AA; the second adhesive layer 142 has no adhesiveness or extremely low adhesiveness and cannot be adhered to the arc surface region BB. Then, during the lamination process of the composite tape 13 and the curved display panel 12, obviously, the first adhesive layer 141 first adheres to the planar region AA. At this time, the second adhesive layer 142 cannot be adhered to the arc surface region BB, thus avoiding the generation of bubbles due to the premature contact of the adhesive layer 14 with the arc surface region BB; after the first adhesive layer 141 is adhered to the planar region AA, it is processed, such as Figure 1 as shown, enabling the second adhesive layer 142 to be adhered to the arc surface region BB in the second state, realizing the adhesion of the arc surface region BB and the second adhesive layer 142. Thus, the perfect adhesion of the adhesive layer 14 and the curved display panel 12 is completed without generating bubbles, thereby improving the adhesion effect of the composite tape 13 and the curved display panel 12.

[0051] Optionally, in another embodiment of the present invention, the first adhesive layer 141 is a pressure-sensitive adhesive layer, and the second adhesive layer 142 is a thermosetting adhesive layer.

[0052] The first state is the unheated state, and the second state is the state after heating.

[0053] Specifically, in the embodiment of the present invention, the first adhesive layer 141 is a pressure-sensitive adhesive layer, and the adhesiveness of this pressure-sensitive adhesive layer at normal temperature is not less than 2000 gf / inch, which can directly adhere the pressure-sensitive adhesive layer to the planar region AA; the second adhesive layer 142 is a thermosetting adhesive layer, and the adhesiveness of this thermosetting adhesive layer at normal temperature is 10 gf / inch - 50 gf / inch, and its adhesiveness is relatively low. Therefore, the thermosetting adhesive layer cannot be directly adhered to the arc surface region BB. Only after heating can the adhesiveness of the thermosetting adhesive layer be improved to ensure that the thermosetting adhesive layer can be adhered to the arc surface region BB.

[0054] That is to say, in the embodiment of the present invention, when the first adhesive layer 141 is a pressure-sensitive adhesive layer and the second adhesive layer 142 is a thermosetting adhesive layer, the first state is the unheated state, which can also be understood as the normal temperature state or the state in a normal environment, and the second state is the state after heating.

[0055] It should be noted that the viscosity of the thermosetting adhesive layer is relatively low in the first state, and its viscosity increases in the second state; the viscosity of the pressure-sensitive adhesive layer in the first state must be less than or equal to the viscosity in the second state, that is, in the process of converting from the first state to the second state, the viscosity of the thermosetting adhesive layer increases, and the viscosity of the pressure-sensitive adhesive layer does not decrease, thereby improving the overall fitting effect between the composite tape 13 and the curved display panel 12, thereby ultimately improving the overall effect of the curved display module.

[0056] refer to Figure 4 , Figure 4 A schematic diagram of the bonding of a composite tape and a curved display panel during a transition from a first state to a second state provided in an embodiment of the present invention.

[0057] like Figure 4 As shown, the first adhesive layer 141 is a pressure-sensitive adhesive layer, and the second adhesive layer 142 is a thermosetting adhesive layer. In the first state, the viscosity of the pressure-sensitive adhesive layer is not less than 2000 gf / inch. Obviously, in the first state, the pressure-sensitive adhesive layer can be first bonded to the plane area AA; in the first state, the viscosity of the thermosetting adhesive layer is 10 gf / inch-50 gf / inch, and its viscosity is relatively low. Obviously, in the first state, the thermosetting adhesive layer cannot be bonded to the curved area BB, thereby avoiding bubbles produced by the adhesive layer 14 contacting the curved area BB in advance; then, after the pressure-sensitive adhesive layer is bonded to the plane area AA, a heat treatment is performed to change from the first state to the second state. At this time, the viscosity of the thermosetting adhesive layer increases, so that the thermosetting adhesive layer can be bonded to the curved area BB in the second state, thereby realizing the bonding of the curved area BB with the thermosetting adhesive layer. At this point, the adhesive layer 14 is perfectly bonded to the curved display panel 12 without generating bubbles, thereby improving the bonding effect of the composite tape 13 and the curved display panel 12.

[0058] Optionally, in another embodiment of the present invention, refer to Figure 5 , Figure 5 A partial structural diagram of another curved display module provided by an embodiment of the present invention; Figure 6 , Figure 6 A partial cross-sectional schematic diagram of another composite tape provided in an embodiment of the present invention.

[0059] The composite tape 13 also includes:

[0060] The buffer layer 15 is located on a side of the adhesive layer 14 away from the curved display panel 12 .

[0061] Specifically, in the embodiment of the present invention, the buffer layer 15 includes but is not limited to a foam buffer layer, which is used to achieve buffer protection for the curved display panel 12 and the composite tape 13 itself.

[0062] Optionally, in another embodiment of the present invention, referring to Figure 7 , Figure 7 , which is a partial structural schematic diagram of another curved display module provided by an embodiment of the present invention; referring to Figure 8 , Figure 8 , which is a partial cross-sectional schematic diagram of another composite tape provided by an embodiment of the present invention.

[0063] The composite tape 13 further includes:

[0064] A third adhesive layer 16 located between the second adhesive layer 142 and the buffer layer 15.

[0065] Specifically, in the embodiment of the present invention, since the second adhesive layer 142 has extremely low or no adhesiveness in the first state and cannot be attached to the arc surface area BB, obviously the second adhesive layer 142 will not be adhered to the buffer layer 15 in the first state either. Therefore, in the embodiment of the present invention, the third adhesive layer 16 is used to realize the bonding between the second adhesive layer 142 and the buffer layer 15.

[0066] Among them, the third adhesive layer 16 has a certain adhesiveness in both the first state and the second state, ensuring that the second adhesive layer 142 will not have the risk of falling off.

[0067] Optionally, in another embodiment of the present invention, referring to Figure 9 , Figure 9 , which is a partial structural schematic diagram of another curved display module provided by an embodiment of the present invention; referring to Figure 10 , Figure 10 , which is a partial cross-sectional schematic diagram of another composite tape provided by an embodiment of the present invention.

[0068] The third adhesive layer 16 and the first adhesive layer 141 are made of the same material.

[0069] Specifically, in the embodiment of the present invention, when the third adhesive layer 16 and the first adhesive layer 141 are made of the same material, the first adhesive layer 141 can be laid on the whole surface, and then the second adhesive layer 142 is arranged on the side of the first adhesive layer 141 facing the curved display panel 12, and it is ensured that the surface of the first adhesive layer 141 facing the curved display panel 12 and the surface of the second adhesive layer 142 facing the curved display panel 12 are on the same surface, avoiding the occurrence of a height difference, thereby improving the bonding effect of the composite tape.

[0070] Optionally, in another embodiment of the present invention, referring to Figure 11 , Figure 11 , which is a partial structural schematic diagram of another curved display module provided by an embodiment of the present invention; referring to Figure 12 , Figure 12A partial cross-sectional schematic diagram of another composite tape provided in an embodiment of the present invention.

[0071] The composite tape 13 also includes:

[0072] The metal layer 17 is located on a side of the buffer layer 15 away from the bonding layer 14 .

[0073] Specifically, in the embodiment of the present invention, the metal layer 17 can realize the electrical connection of some functions of the curved display module, such as grounding, etc., and can also play a role in heat dissipation and a buffering role to realize buffering protection of the curved display panel 12 and the composite tape 13 itself.

[0074] The metal layer 17 includes but is not limited to copper foil.

[0075] Optionally, in another embodiment of the present invention, refer to Figure 13 , Figure 13 A partial structural schematic diagram of another curved display module provided by an embodiment of the present invention.

[0076] The curved display module also includes:

[0077] A support layer 18 is located between the curved display panel 12 and the composite tape 13 .

[0078] Specifically, in the embodiment of the present invention, the support layer 18 is located between the curved display panel 12 and the adhesive layer 14. Based on the flexibility of the curved display panel 12, in order to avoid wrinkles on the curved display panel 12, the support layer 18 is provided to ensure the curvature and extensibility of the curved display panel 12, thereby improving the structural stability of the curved display panel 12, thereby improving the display performance of the curved display module.

[0079] Optionally, in another embodiment of the present invention, refer to Figure 14 , Figure 14 A partial structural schematic diagram of another curved display module provided by an embodiment of the present invention.

[0080] The curved display module also includes:

[0081] A polarizer 19 is located between the curved display panel 12 and the cover plate 11 .

[0082] Specifically, in the embodiment of the present invention, the polarizer 19 is located on the side of the curved display panel 12 away from the composite tape 13, that is, on the light emitting side of the curved display panel 12, to adjust the light emitting of the curved display panel 12 to improve the light emitting effect of the curved display panel 12.

[0083] Optional, such as Figure 14As shown, the polarizer 19 is fixed to the curved cover plate 11 through an OCA (Optically Clear Adhesive) optical adhesive 20. The OCA optical adhesive 20 is colorless and transparent, has a light transmittance of more than 95%, good bonding strength, can be cured at room temperature or medium temperature, and has characteristics such as small curing shrinkage.

[0084] Optionally, based on all the above embodiments of the present invention, in another embodiment of the present invention, a method for manufacturing a curved display module is further provided. Refer to Figure 15 , Figure 15 which is a schematic flow chart of a method for manufacturing a curved display module provided by an embodiment of the present invention.

[0085] The method for manufacturing the curved display module includes:

[0086] S101: Provide the basic structure of the curved display module and a composite tape 13. The basic structure includes a curved cover plate 11 and a curved display panel 12 located on one side of the curved cover plate 11. The curved display panel 12 includes a flat area AA and a curved surface area BB. The composite tape 13 includes an adhesive layer 14, and the adhesive layer 14 includes a first adhesive layer 141 that fits with the flat area AA and a second adhesive layer 142 that fits with the curved surface area BB.

[0087] S102: In a first state, make the first adhesive layer 141 fit with the flat area AA.

[0088] S103: In a second state, make the second adhesive layer 142 fit with the curved surface area BB.

[0089] Specifically, in the embodiment of the present invention, in the first state, the first adhesive layer 141 fits with the flat area AA, and the second adhesive layer 142 does not fit with the curved surface area BB; in the second state, the first adhesive layer 141 fits with the flat area AA, and the second adhesive layer 142 fits with the curved surface area BB.

[0090] In the embodiment of the present invention, making the first adhesive layer 141 fit with the flat area AA in the first state can be understood as: in the first state, the first adhesive layer 141 has adhesiveness, and this adhesiveness can make the first adhesive layer 141 fit on the flat area AA.

[0091] In the embodiment of the present invention, the second adhesive layer 142 not fitting with the curved surface area BB in the first state can be understood as: in the second state, the second adhesive layer 142 does not have adhesiveness, or the adhesiveness of the second adhesive layer 142 is extremely small, and this adhesiveness cannot make the second adhesive layer 142 fit on the curved surface area BB.

[0092] In the embodiment of the present invention, the fitting of the first adhesive layer 141 to the planar region AA in the second state can be understood as: in the second state, the first adhesive layer 141 has adhesiveness, and this adhesiveness can make the first adhesive layer 141 fit on the planar region AA.

[0093] In the embodiment of the present invention, the fitting of the second adhesive layer 142 to the arc surface region BB in the second state can be understood as: in the second state, the second adhesive layer 142 has adhesiveness, and this adhesiveness can make the second adhesive layer 142 fit on the arc surface region BB.

[0094] It can be seen from this that based on the composite tape 13 having the first adhesive layer 141 and the second adhesive layer 142, as Figure 3 shown, since the first adhesive layer 141 has adhesiveness in the first state and can fit with the planar region AA; the second adhesive layer 142 has no adhesiveness or extremely low adhesiveness and cannot fit with the arc surface region BB, then during the fitting process of the composite tape 13 and the curved display panel 12, it is obvious that the first adhesive layer 141 is first fitted to the planar region AA. At this time, the second adhesive layer 142 cannot fit on the arc surface region BB, thereby avoiding the generation of bubbles due to the premature contact of the adhesive layer 14 with the arc surface region BB; then, after the first adhesive layer 141 is fitted to the planar region AA, a treatment is performed, such as Figure 1 shown, to make the second adhesive layer 142 fit with the arc surface region BB in the second state, realizing the fitting of the arc surface region BB and the second adhesive layer 142. Thus, the perfect fitting of the adhesive layer 14 and the curved display panel 12 is completed without generating bubbles, thereby improving the fitting effect of the composite tape 13 and the curved display panel 12.

[0095] Optionally, in another embodiment of the present invention, the first adhesive layer 141 is a pressure-sensitive adhesive layer, and the second adhesive layer 142 is a thermosetting adhesive layer.

[0096] The first state is the unheated state, and the second state is the state after heating.

[0097] Specifically, in the embodiment of the present invention, the first adhesive layer 141 is a pressure-sensitive adhesive layer, and the viscosity of the pressure-sensitive adhesive layer at room temperature is not less than 2000 gf / inch, which can directly adhere the pressure-sensitive adhesive layer to the plane area AA; the second adhesive layer 142 is a thermosetting adhesive layer, and the viscosity of the thermosetting adhesive layer at room temperature is 10 gf / inch - 50 gf / inch, and its viscosity is relatively low. Therefore, the thermosetting adhesive layer cannot be directly adhered to the arc surface area BB. Only after heating can the viscosity of the thermosetting adhesive layer be increased to ensure that the thermosetting adhesive layer can be adhered to the arc surface area BB.

[0098] That is to say, in the embodiment of the present invention, when the first adhesive layer 141 is a pressure-sensitive adhesive layer and the second adhesive layer 142 is a thermosetting adhesive layer, the first state is the unheated state, which can also be understood as the room temperature state or the state under normal environment, and the second state is the state after heating.

[0099] It should be noted that the viscosity of the thermosetting adhesive layer is relatively low in the first state and increases in the second state; the viscosity of the pressure-sensitive adhesive layer in the first state should be less than or equal to the viscosity in the second state. That is to say, during the conversion from the first state to the second state, the viscosity of the thermosetting adhesive layer increases, and the viscosity of the pressure-sensitive adhesive layer does not decrease, thereby improving the overall adhesion effect of the composite tape 13 to the curved display panel 12 and ultimately improving the overall effect of the curved display module.

[0100] As Figure 4 shown, the first adhesive layer 141 is a pressure-sensitive adhesive layer, and the second adhesive layer 142 is a thermosetting adhesive layer. In the first state, the viscosity of the pressure-sensitive adhesive layer is not less than 2000 gf / inch. Obviously, in the first state, the pressure-sensitive adhesive layer can first be adhered to the plane area AA; in the first state, the viscosity of the thermosetting adhesive layer is 10 gf / inch - 50 gf / inch, and its viscosity is relatively low. Obviously, in the first state, the thermosetting adhesive layer cannot be adhered to the arc surface area BB, thereby avoiding the generation of bubbles due to the premature contact of the adhesive layer 14 with the arc surface area BB; then, after the pressure-sensitive adhesive layer is adhered to the plane area AA, heat treatment is performed to change from the first state to the second state. At this time, the viscosity of the thermosetting adhesive layer increases, enabling the thermosetting adhesive layer to be adhered to the arc surface area BB in the second state, realizing the adhesion of the arc surface area BB to the thermosetting adhesive layer. Thus, the perfect adhesion of the adhesive layer 14 to the curved display panel 12 is completed without generating bubbles, thereby improving the adhesion effect of the composite tape 13 to the curved display panel 12.

[0101] Optionally, in another embodiment of the present invention, referring to Figure 16 , Figure 16Schematic flow chart of another method for manufacturing a curved display module provided by an embodiment of the present invention.

[0102] In step S102, in the first state, the first adhesive layer 141 is bonded to the planar region AA. Specifically, it can be:

[0103] S1021: In the first state, the first adhesive layer 141 is bonded to the planar region AA by rolling with a roller 21.

[0104] Specifically, in the embodiment of the present invention, referring to Figure 17 , Figure 17 is a schematic diagram of the effect of bonding the first adhesive layer to the planar region provided by an embodiment of the present invention. By rolling back and forth with the roller 21, the first adhesive layer 141 is perfectly bonded to the planar region.

[0105] Optionally, in another embodiment of the present invention, referring to Figure 18 , Figure 18 is a schematic flow chart of yet another method for manufacturing a curved display module provided by an embodiment of the present invention.

[0106] In step S103, in the second state, the second adhesive layer 142 is bonded to the arc surface region BB. Specifically, it can be:

[0107] S1031: In the second state, the second adhesive layer 142 is bonded to the arc surface region BB by rolling with a roller 21.

[0108] Specifically, in the embodiment of the present invention, referring to Figure 19 , Figure 19 is a schematic diagram of the effect of bonding the second adhesive layer to the arc surface region provided by an embodiment of the present invention. By rolling back and forth with the roller 21, the second adhesive layer 142 is perfectly bonded to the arc surface region BB.

[0109] It should be noted that when bonding the second adhesive layer 142, the starting position of the roller 21 is within the planar region AA. That is to say, after the first adhesive layer 141 is bonded to the planar region AA, when starting to bond the second adhesive layer 142 by rolling with the roller 21, the starting position of the roller 21 needs to be within the planar region AA, that is, the starting rolling direction of the roller 21 is from the planar region AA to the arc surface region BB. Adopting such a rolling method can ensure that the second adhesive layer 142 has no risk of wrinkling and no bonding bubbles, so as to maximize the bonding effect between the composite tape 13 and the curved display panel 12.

[0110] The above has introduced in detail a curved surface display module and a preparation method provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

[0111] It should be noted that the various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0112] It should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that the elements inherent in a process, method, article or device including a series of elements, or those elements that are also inherent in these process, methods, articles or devices. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0113] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A curved surface display module, characterized in that, The curved display module includes: A curved cover plate; A curved display panel located on one side of the curved cover plate, the curved display panel including a flat area and a curved area; A composite tape located on the side of the curved display panel facing away from the curved cover plate, the composite tape including an adhesive layer, the adhesive layer including a first adhesive layer that fits with the flat area and a second adhesive layer that fits with the curved area; wherein, in a first state, the first adhesive layer fits with the flat area and the second adhesive layer does not fit with the curved area; in a second state, the first adhesive layer fits with the flat area and the second adhesive layer fits with the curved area; The composite tape further includes: A buffer layer located on the side of the adhesive layer facing away from the curved display panel; A third adhesive layer located between the second adhesive layer and the buffer layer, the third adhesive layer and the first adhesive layer being of the same material, and the first adhesive layer and the third adhesive layer being an integral structure, wherein the surface of the first adhesive layer facing the curved display panel and the surface of the second adhesive layer facing the curved display panel are on the same surface.

2. The curved display module according to claim 1, wherein The first adhesive layer is a pressure-sensitive adhesive layer, and the second adhesive layer is a thermosetting adhesive layer; The first state is an unheated state, and the second state is a state after heating.

3. The curved surface display module according to claim 1, wherein The buffer layer is a foam buffer layer.

4. The curved display module according to claim 1, wherein The composite tape further includes: A metal layer located on the side of the buffer layer facing away from the adhesive layer.

5. The curved display module according to claim 1, wherein The curved display module further includes: A support layer located between the curved display panel and the composite tape.

6. The curved display module according to claim 1, wherein The curved display module further includes: A polarizer located between the curved display panel and the cover plate.

7. A method for preparing a curved surface display module, characterized in that, For preparing the curved display module according to any one of claims 1-6, the preparation method includes: Providing a basic structure of the curved display module and a composite tape, the basic structure including a curved cover plate, a curved display panel located on one side of the curved cover plate, the curved display panel including a flat area and a curved area; the composite tape including an adhesive layer, the adhesive layer including a first adhesive layer that fits with the flat area and a second adhesive layer that fits with the curved area; the composite tape further includes: A buffer layer located on the side of the adhesive layer facing away from the curved display panel; A third adhesive layer located between the second adhesive layer and the buffer layer, the third adhesive layer and the first adhesive layer being of the same material, and the first adhesive layer and the third adhesive layer being an integral structure, wherein the surface of the first adhesive layer facing the curved display panel and the surface of the second adhesive layer facing the curved display panel are on the same surface; In the first state, making the first adhesive layer fit with the flat area; In the second state, making the second adhesive layer fit with the curved area.

8. The preparation method according to claim 7, characterized in that, The first adhesive layer is a pressure-sensitive adhesive layer, and the second adhesive layer is a thermosetting adhesive layer; The first state is an unheated state, and the second state is a state after heating.

9. The preparation method according to claim 7, characterized in that, The making the first adhesive layer fit with the flat area in the first state includes: In the first state, the first adhesive layer is bonded to the planar region by means of roller rolling.

10. The preparation method according to claim 7, characterized in that, Bonding the second adhesive layer to the arc surface region in the second state includes: In the second state, the second adhesive layer is bonded to the arc surface region by means of roller rolling.

11. The preparation method according to claim 10, wherein The starting position of the roller is located within the planar region.

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