CN115311944A

CN115311944A - Protective cover plate, laminating jig, display module and manufacturing method thereof

Info

Publication number: CN115311944A
Application number: CN202210939903.0A
Authority: CN
Inventors: 裴军强; 张琪
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-11-08
Anticipated expiration: 2042-08-05
Also published as: CN115311944B; WO2024026960A1

Abstract

The application discloses a protective cover plate, a bonding jig, a display module and a manufacturing method thereof, wherein the display module is provided with a main display area, at least one first side curved surface area, at least one second side curved surface area and at least one corner area, the adjacent first side curved surface area and the adjacent second side curved surface area are respectively connected to two adjacent sides of the main display area, the at least one corner area is connected with the main display area, the corner area is connected between the adjacent first side curved surface area and the adjacent second side curved surface area, and the display module comprises the protective cover plate and a display component bonded with the protective cover plate; the surface of the protective cover plate close to the display assembly is provided with a cover plate fold structure in a corner area, and the display assembly is provided with a display assembly fold structure meshed with the cover plate fold structure in the corner area.

Description

Protective cover plate, laminating jig, display module and manufacturing method thereof

Technical Field

The application relates to the technical field of display, in particular to a protective cover plate, a laminating jig, a display module and a manufacturing method of the display module.

Background

In order to realize the full-screen display, it is a common design to design the four sides of the display screen as curved surface display, and in order to further optimize the display effect of the full-screen, the four corners of the display screen are also designed as curved surface display. However, when four corners of display screen also design and show for the curved surface, need laminate planar flexible display panel to the apron that the corner has the gaussian curved surface, flexible display panel laminates to the in-process of apron, flexible display panel can form the fold of the continuous increase of volume in the corner, the fold of the continuous increase of volume can increase flexible display panel and stress concentration and the risk of fracture appear, flexible display panel fracture can lead to water oxygen invasion to flexible display panel and then lead to flexible display panel's corner to appear showing the risk of inefficacy.

Therefore, a technical solution is needed to solve the problem of stress concentration during the attaching process of the flexible display panel.

Disclosure of Invention

An object of the application is to provide a protection cover plate, a laminating jig, a display module and a manufacturing method thereof, so that the problem of stress concentration of the display module in the laminating process is solved.

In a first aspect, the present application provides a display module, where the display module has a main display area, at least one first side curved surface area, at least one second side curved surface area, and at least one corner area, where adjacent first side curved surface area and second side curved surface area are respectively connected to two adjacent sides of one main display area, at least one corner area is connected to one main display area, and one corner area is connected between adjacent first side curved surface area and one second side curved surface area, and the display module includes a protective cover plate and a display component attached to the protective cover plate;

the surface of the protective cover plate close to the display assembly is provided with a cover plate fold structure in the corner area, and the display assembly is provided with a display assembly fold structure meshed with the cover plate fold structure in the corner area.

In a second aspect, the present application further provides a protective cover plate of a display module, where the protective cover plate has at least one first cover plate side curved surface region, at least one second cover plate side curved surface region, and at least one cover plate corner region, and one cover plate corner region is connected between adjacent first cover plate side curved surface region and one second cover plate side curved surface region, the protective cover plate includes:

and the cover plate fold structure is positioned on the binding surface of the protective cover plate in the corner area of the cover plate.

In a third aspect, the present application further provides a bonding jig, where the bonding jig has at least one first side supporting curved surface region, at least one second side supporting curved surface region, and at least one supporting corner curved surface region, and one supporting corner curved surface region is connected between a first side supporting curved surface region and a second side supporting curved surface region which are adjacent to each other, and the bonding jig includes:

and the jig fold structure is positioned on the support surface of the attaching jig on the support corner curved surface area.

In a fourth aspect, the present application further provides a method for manufacturing a display module, the method including the steps of:

providing a display component to be attached, wherein the display component to be attached is flat;

providing a protective cover plate, wherein the protective cover plate is provided with at least one first cover plate side curved surface area, at least one second cover plate side curved surface area and at least one cover plate corner area, one cover plate corner area is connected between the adjacent first cover plate side curved surface area and one second cover plate side curved surface area, the protective cover plate comprises a cover plate corrugation structure, and the cover plate corrugation structure is positioned on the abutting surface of the protective cover plate on the cover plate corner area;

providing a bonding jig, wherein the bonding jig is provided with at least one first side supporting curved surface region, at least one second side supporting curved surface region and at least one supporting corner curved surface region, one supporting corner curved surface region is connected between the adjacent first side supporting curved surface region and the adjacent second side supporting curved surface region, the bonding jig comprises a jig wrinkle structure, the jig wrinkle structure is positioned on the supporting surface of the supporting corner curved surface region of the bonding jig, and the jig wrinkle structure is matched with the cover plate wrinkle structure;

placing the display assembly to be attached on the supporting surface of the attaching jig;

placing the protective cover plate on the display assembly to be bonded, enabling the cover plate fold structure of the cover plate corner area and the jig fold structure of the support corner curved surface area to be correspondingly arranged, enabling one first cover plate side curved surface area to correspond to one first side support curved surface area and one second cover plate side curved surface area to correspond to one second side support curved surface area, pressing the protective cover plate and the display assembly to be bonded under the supporting effect of the bonding jig, forming a display assembly fold structure under the effect of the jig fold structure and the cover plate fold structure which are matched in the pressing process, and enabling the display assembly fold structure to be meshed with the jig fold structure and the cover plate fold structure;

and removing the attaching jig to obtain the display module.

Has the beneficial effects that: the application provides a protection cover plate, a laminating jig, a display module and a manufacturing method thereof, a cover plate fold structure is arranged on a laminating surface of a cover plate corner area through the protection cover plate, a jig fold structure is arranged on a supporting surface of a supporting corner curved surface area of the laminating jig, the jig fold structure is matched with the cover plate fold structure, a flat display assembly to be laminated is placed on the laminating jig, the protection cover plate is placed on the display assembly to be laminated, the cover plate fold structure is arranged corresponding to the jig fold structure, in the laminating process of the display assembly to be laminated and the protection cover plate, the cover plate fold structure and the jig fold structure of the matched structure jointly guide the display assembly to be laminated to form the display assembly fold structure which is meshed with the cover plate fold structure and the jig fold structure in a homogeneous phase mode, the appearance of the display assembly fold structure has controllability and stability, the problem of stress concentration caused by continuous development and increase of the fold structure of the display panel in the laminating process in the traditional technology is solved, and the problems of cracking and display failure at corners caused by stress concentration are further improved.

And, binding face for protecting the apron corner among the conventional art is level and smooth gaussian curved surface, this application protection apron sets up apron fold structure on the binding face in apron corner district, make the protection apron in apron corner district and the laminating area increase of waiting to laminate the display element laminating, reduce the laminating area of waiting to laminate the display element and corresponding the corner district and the laminating area's of protection apron corresponding the apron corner district difference, and then reduce because the laminating area of waiting to laminate the display element and corresponding the corner district and the laminating area difference between the laminating area of protection apron corresponding the apron corner district and the volume of display element fold structure that produces, further improve the stress concentration problem and the problem that the corner shows the inefficacy that fold structure causes.

Drawings

Fig. 1 is a schematic view of a display module according to an embodiment of the present application;

FIG. 2 is a schematic perspective view of a display module and a protective cover of the display module shown in FIG. 1;

FIG. 3 is an exploded view of the display assembly of FIG. 2;

FIG. 4 is an enlarged view of the side of the protective cover adjacent the display module of FIG. 2 at A1;

FIG. 5 is an enlarged view of the side of the display assembly of FIG. 2 adjacent the protective cover at A2;

FIG. 6 is an enlarged view of the side of the display assembly of FIG. 2 away from the protective cover at A2;

FIG. 7 is a schematic cross-sectional view taken along line I-I of the display module shown in FIG. 1;

FIG. 8 is a schematic cross-sectional view taken along line II-II of the display module assembly shown in FIG. 1;

fig. 9 is a rainbow diagram of gaussian curvature distribution when a joint surface of a conventional protective cover plate at a corner is a gaussian curved surface;

FIG. 10 is an enlarged view of a side of a protective cover plate of a display module according to another embodiment of the present disclosure near a display element in and around a corner region;

FIG. 11 is an enlarged view of a display module according to another embodiment of the present disclosure, wherein the display module includes a corner region and a side of the corner region adjacent to a protective cover;

FIG. 12 is a cross-sectional view of a display module along the thickness of a corner region in the direction where the corner region extends from the junction of a first curved side region and the corner region to the junction of a second curved side region and the corner region according to another embodiment of the present application;

fig. 13 is a schematic cross-sectional view of a display module assembly according to another embodiment of the present disclosure, taken along the thickness direction of a corner region, in the thickness direction of a main display region, a cover plate corrugated structure, and a display module corrugated structure, extending from a junction of the main display region and the corner region to an edge of the corner region away from the main display region;

FIG. 14 is an enlarged view of a side of a protective cover plate of a display module according to yet another embodiment of the present disclosure near a display element in and around a corner region;

FIG. 15 is an enlarged view of a display module according to yet another embodiment of the present disclosure, wherein the display module includes a corner region and a side of the corner region adjacent to a protective cover;

FIG. 16 is a cross-sectional view of a display module according to yet another embodiment of the present application, taken through the thickness of the corner region, in a direction where the corner region extends from the junction of the first curved side region and the corner region to the junction of the second curved side region and the corner region;

fig. 17 is a perspective view of a planar display panel to be bonded, a planar first functional unit to be bonded, and a planar second functional unit to be bonded;

FIG. 18 is a schematic cross-sectional view of a flat display device to be bonded;

FIG. 19 is a schematic perspective view of a protective cover according to an embodiment of the present application;

FIG. 20 is an enlarged partial view of the protective cover of FIG. 19 at A3;

fig. 21 is a schematic perspective view of a bonding jig according to an embodiment of the present application;

fig. 22 is a partially enlarged view of a portion A4 of the bonding jig shown in fig. 21.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Please refer to fig. 1, which is a schematic diagram of a display module according to an embodiment of the present application. The display module 100 has a main display area 100a, at least one first side curved area 100b, at least one second side curved area 100c, and at least one corner area 100d. A corner area 100d is connected between adjacent ones of the first side curved surface areas 100b and the second side curved surface areas 100 c. Adjacent one of the first side curved surface regions 100b and one of the second side curved surface regions 100c are connected to adjacent sides of one of the main display regions 100a, respectively, and at least one of the corner regions 100d is connected to one of the main display regions 100 a.

Specifically, in the present embodiment, the display module 100 has a main display area 100a, two first curved side areas 100b, two second curved side areas 100c and four corner areas 100d. The main display area 100a, the two first side curved surface areas 100b, the two second side curved surface areas 100c, and the four corner areas 100d are for display.

The main display area 100a is planar, but is not limited thereto, and the main display area 100a may be curved. The main display area 100a has first and third opposite sides and second and fourth opposite sides, the first and second and fourth sides of the main display area 100a are adjacent, and the third and second and fourth sides of the main display area 100a are also adjacent.

One first side curved surface area 100b is connected to a first side of the main display area 100a, and the other first side curved surface area 100b is connected to a third side of the main display area 100a, so that the two first side curved surface areas 100b are respectively connected to opposite sides of the main display area 100 a. The two first curved side regions 100b are curved, but not limited thereto, and the two first curved side regions 100b may be flat.

One second side curved surface area 100c is connected to the second side of the main display area 100a, and the other second side curved surface area 100c is connected to the fourth side of the main display area 100a, so that the two second side curved surface areas 100c are respectively connected to two opposite sides of the main display area 100 a. The two second side curved regions 100c are also curved, but not limited thereto, and the two second side curved regions 100c may also be planar.

Each corner area 100d is connected between the adjacent one of the first side curved surface areas 100b and one of the second side curved surface areas 100c and is connected with the main display area 100 a. The corner area 100d is curved, and the curved surface is spherical.

Please refer to fig. 2, which is a schematic perspective view of a display module and a protective cover plate of the display module shown in fig. 1. The display module 100 includes a display assembly 80 and a protective cover 20 attached to the display assembly 80.

In the present embodiment, the protective cover 20 is located on the light-emitting side of the display element 80 to protect the display element 80. The protective cover 20 is a transparent four-curved cover. The protective cover 20 is a glass-based cover, but is not limited thereto, and the protective cover 20 may also include a transparent polymer cover, or the protective cover 20 may also include ultra-thin glass.

The surface of the protective cover plate 20 away from the display module 80 in the corner area 100d includes a smooth curved surface, for example, the smooth curved surface is a gaussian curved surface, so that the display module 100 has a smooth appearance, and the user experience is further improved.

The protective cover 20 has the same thickness in the main display area 100a, the first side curved area 100b and the second side curved area 100 c.

Please refer to fig. 3, which is an exploded view of the display module shown in fig. 2. The display assembly 80 has equal thickness in the main display area 100a, the first side curved area 100b and the second side curved area 100 c.

In the present embodiment, the display assembly 80 includes a display panel 10, a first functional unit 30 and a second functional unit 40, the first functional unit 30 is disposed between the display panel 10 and the protective cover 20, and the second functional unit 40 is disposed on a side of the display panel 10 away from the protective cover 20.

The display panel 10 is a flexible display panel. The display panel 10 includes a flexible substrate, a driving circuit layer, and a plurality of light emitting devices. The flexible substrate includes a polymer base including, but not limited to, at least one of a polyimide layer, a polyethylene terephthalate layer. The driving circuit layer is arranged on the flexible substrate and comprises a plurality of driving circuits, and the driving circuits comprise thin film transistors, capacitors and other devices. The plurality of light emitting devices are arranged on one side, far away from the flexible substrate, of the driving circuit layer, and include but are not limited to at least one of organic light emitting diodes, quantum dot light emitting diodes, inorganic light emitting diodes, micro light emitting diodes and sub-millimeter light emitting diodes.

In particular, the display panel 10 is a flexible organic light emitting diode display panel. The flexible organic light emitting diode display panel comprises a flexible substrate, a driving circuit layer, a light emitting device layer and a thin film packaging layer which are sequentially stacked.

It is understood that the display panel 10 may further include a touch layer integrated on the thin film encapsulation layer and a filter layer formed on the touch layer. The touch layer may include a self-capacitive touch unit or a mutual capacitive touch unit, and the touch layer may further include an antenna unit. The filter layer is used for replacing a traditional polarizer and comprises a color filter layer and a black matrix, and the color filter layer comprises a plurality of red light resistors, a plurality of blue light resistors and a plurality of green light resistors.

The first functional unit 30 is a transparent optical adhesive layer, but not limited thereto, the first functional unit 30 may also include two transparent optical adhesive layers and functional layers such as a polarizer located between the two transparent optical adhesive layers.

The second functional unit 40 includes a back plate and a transparent optical adhesive layer on the back plate, the transparent optical adhesive layer on the back plate is located at a side close to the display panel 10, but is not limited thereto, and the second functional unit 40 may also include other functional layers.

Referring to fig. 4, fig. 5, fig. 6, fig. 7 and fig. 8, fig. 4 is an enlarged view of a side of the protective cover plate close to the display module in fig. 2 at a position A1, fig. 5 is an enlarged view of a side of the display module close to the protective cover plate in fig. 2 at a position A2, fig. 6 is an enlarged view of a side of the display module far from the protective cover plate in fig. 2 at a position A2, fig. 7 is a cross-sectional view taken along a line i-i of the display module shown in fig. 1, and fig. 8 is a cross-sectional view taken along a line ii-ii of a cover plate folding structure and a display module folding structure of the display module shown in fig. 1.

In this embodiment, the surface of the protective cover 20 close to the display assembly 80 is provided with a cover folding structure 201 in the corner area 100d, and the display assembly 80 is provided with a display assembly folding structure 801 in the corner area 100d, which is engaged with the cover folding structure 201.

As shown in fig. 4 and 7, the protective cover 20 includes a corner attaching curved surface 20a at a side of the corner area 100d close to the display assembly 80, the protective cover 20 has a thickness at a position of the corner attaching curved surface 20a equal to that of the protective cover 20 in the main display area 100a, the corner attaching curved surface 20a is a smooth curved surface, and the cover folding structure 201 is disposed on the corner attaching curved surface 20a and protrudes and/or sinks relative to the corner attaching curved surface 20 a.

As shown in fig. 5, 6 and 7, the display element 80 includes a display element corner portion 802 in the corner region 100d, the thickness of the display element corner portion 802 is equal to the thickness of the display element 80 in the main display region 100a, the display element corner portion 802 is a smooth curved surface portion, and the display element corrugated structure 801 is disposed on the display element corner portion 802 and protrudes and/or is recessed relative to the display element corner portion 802.

In the process of attaching the protective cover plate 20 to the display assembly 80 before attachment, the cover plate wrinkle structure 201 on the protective cover plate 20 guides the portion, attached to the cover plate wrinkle structure 201, of the display assembly 80 before attachment to form a display assembly wrinkle structure 801 with controllable and stable appearance, correspondingly, the display panel 10 in the display assembly 80 also forms a wrinkle structure with controllable and stable appearance in a corner area, the problem of stress concentration caused by continuous development and increase of the wrinkle structure at the corner of the display panel in the conventional technology in the process of attachment is solved, and further the problems of cracking caused by stress concentration and failure display at the corner are solved.

In the present application, "engagement" refers to direct contact engagement of two mutually engaged structures with an invaginated structure through a complementary protruding structure.

In the present embodiment, at least a portion of the cover plate corrugated structure 201 is located at the edge of the corner area 100d away from the main display area 100a, so that the edge of the corner area 100d away from the main display area 100a on the side of the protective cover plate 20 close to the display assembly 80 and located on the protective cover plate 20 includes a wave segment; correspondingly, due to the guiding effect of the cover plate corrugated structure 201, at least part of the display assembly corrugated structure 801 is located at the edge of the corner region 100d away from the main display region 100a, such that the display assembly 80 comprises a wave segment at the edge of the corner region 100d away from the main display region 100 a. Wherein the wave segment comprises a crest and/or a trough.

In the conventional technology, when the display module is attached to the protective cover plate before the attachment, wrinkles with large wrinkling amplitude are more easily generated at the edges of the corner regions far away from the main display region. In view of this, in the display module according to the embodiment of the application, at least part of the cover plate wrinkle structure 201 is located at the edge of the corner area 100d away from the main display area 100a, so as to guide at least part of the display element wrinkle structure 801 to be located at the edge of the corner area 100d away from the main display area 100a during the attaching process, and while adapting to the wrinkle structure forming process of the display element, guide the display element 80 to form a wrinkle with controllable and stable appearance at the edge of the corner area 100d away from the main display area 100 a.

Specifically, as shown in fig. 4 and 8, the cover plate corrugated structure 201 extends from the connection of the main display area 100a and the corner area 100d to the edge of the corner area 100d away from the main display area 100 a; correspondingly, as shown in fig. 5, 6 and 8, the display assembly corrugated structure 801 extends from the connection point of the main display area 100a and the corner area 100d to the edge of the corner area 100d away from the main display area 100 a.

In the conventional technology, when the display module and the protective cover plate are bonded before bonding, a wrinkle structure extending from the joint of the main display area and the corner area to the edge of the corner area far away from the main display area is easily formed. In view of this, the display module 100 according to the embodiment of the present disclosure extends from the connection point of the main display area 100a and the corner area 100d to the edge of the corner area 100d away from the main display area 100a through the cover plate corrugated structure 201 to guide the display element corrugated structure 801 to extend from the connection point of the main display area 100a and the corner area 100d to the edge of the corner area 100d away from the main display area 100a, so as to adapt to the corrugation forming process on the display element 80 and better guide the display element 80 to form the display element corrugated structure 801 with controllable and stable topography.

It is understood that the cover plate corrugation structure 201 may also extend from any position between the connection between the main display area 100a and the corner area 100d and the edge of the corner area 100d far from the main display area 100a to the edge of the corner area 100d far from the main display area 100a, and correspondingly, the display assembly corrugation structure 801 may extend from any position between the connection between the main display area 100a and the corner area 100d and the edge of the corner area 100d far from the main display area 100a to the edge of the corner area 100d far from the main display area 100 a.

In addition, the extending direction of the cover plate corrugated structure 201 may also be the same as the extending direction of the corner region 100d extending from the connection of the corner region 100d and the first side curved surface region 100b to the connection of the corner region 100d and the second side curved surface region 100c, and correspondingly, the extending direction of the display assembly corrugated structure 801 is the same as the extending direction of the corner region 100d extending from the connection of the corner region 100d and the first side curved surface region 100b to the connection of the corner region 100d and the second side curved surface region 100 c. For example, the cover plate corrugated structure 201 extends from the connection of the corner area 100d and the first side curved area 100b to the connection of the corner area 100d and the second side curved area 100c, and correspondingly, the display assembly corrugated structure 801 extends from the connection of the corner area 100d and the first side curved area 100b to the connection of the corner area 100d and the second side curved area 100 c.

In this embodiment, the magnitude of the pleating of at least part of the cover sheet pleat structure 201 increases towards the edge of the corner region 100d away from the main display region 100a, and correspondingly, the magnitude of the pleating of at least part of the display assembly pleat structure 801 increases towards the edge of the corner region 100d away from the main display region 100 a.

It will be appreciated that the magnitude of the pleating of the entire cover sheet pleat structure 201 may increase towards the edge of the corner region 100d away from the main display region 100a, and correspondingly, the magnitude of the pleating of the entire display assembly pleat structure 801 may increase towards the edge of the corner region 100d away from the main display region 100 a; alternatively, the magnitude of the pleating of one portion of the cover sheet pleat structure 201 may be constant towards the edge of the corner region 100d away from the main display region 100a, the magnitude of the pleating of another portion of the cover sheet pleat structure 201 may be increasing towards the edge of the corner region 100d away from the main display region 100a, correspondingly, the magnitude of the pleating of one portion of the display assembly pleat structure 801 may be constant towards the edge of the corner region 100d away from the main display region 100a, and the magnitude of the pleating of another portion of the display assembly pleat structure 801 may be increasing towards the edge of the corner region 100d away from the main display region 100 a.

In the conventional technology, when the display module and the protective cover plate are attached before attachment, wrinkles with large wrinkling amplitude are more easily generated at the edges of the corner regions far away from the main display region. In view of the above, the wrinkling magnitude of at least part of the cover sheet wrinkle structure 201 increases towards the edge near the corner region 100d away from the main display region 100a, so as to better guide the display element 80 to form the display element wrinkle structure 801 with controllable and stable appearance while adapting the wrinkle formation process on the display element 80.

In the present embodiment, the folding amplitude of at least a portion of the cover panel folding structure 201 is continuously increased first and then decreased second, and the folding amplitude of at least a portion of the display module folding structure 801 is continuously increased first and then decreased second, in the direction in which the corner region 100d extends from the junction of the first side curved surface region 100b and the corner region 100d to the junction of the second side curved surface region 100c and the corner region 100d.

It should be noted that, when the corrugated structure includes a raised structure, the corrugation amplitude of the raised structure is the raised height; when the corrugated structure comprises an invagination structure, the corrugation amplitude of the invagination structure is the invagination depth.

In addition, the folding width of the cover pleated structure 201 is based on the corner attaching curved surface 20a, in other words, the larger the folding width of the cover pleated structure 201 is, the larger the protrusion height or the inward depth of the cover pleated structure 201 with respect to the corner attaching curved surface 20a is, and conversely, the smaller the folding width of the cover pleated structure 201 is, the smaller the protrusion height or the inward depth of the cover pleated structure 201 with respect to the corner attaching curved surface 20a is. The display element corrugation structure 801 has a larger corrugation amplitude with respect to the display element corner portions 802 as a reference, and the larger corrugation amplitude of the display element corrugation structure 801 has a larger protrusion height or indentation depth of the display element corrugation structure 801 as a whole with respect to the display element corner portions 802 as a whole, whereas the smaller corrugation amplitude of the display element corrugation structure 801 has a smaller protrusion height or indentation depth of the display element corrugation structure 801 as a whole with respect to the display element corner portions 802 as a whole.

Specifically, as shown in fig. 4 and 8, the cover sheet corrugated structure 201 includes at least one recessed structure L recessed in a direction away from the display assembly 80, and the first thickness H1 of the protective cover sheet 20 at the position of the recessed structure L is gradually decreased toward the edge of the corner area 100d away from the main display area 100 a; meanwhile, as shown in fig. 7, in a direction in which the corner region 100d extends from the connection of the first side curved surface region 100b and the corner region 100d to the connection of the second side curved surface region 100c and the corner region 100d, the first thickness H1 of the protective cover 20 at the position of the recessed structure L continuously decreases first and then increases.

For example, the cover plate corrugated structure 201 includes three recessed structures L recessed and spaced from the corner attaching curved surface 20a, a first thickness H1 of the protective cover plate 20 at a position of one recessed structure L of the cover plate corrugated structure 201 decreases in a direction close to an edge of the corner area 100d away from the main display area 100a, and the first thickness H1 of the protective cover plate 20 at a position of each recessed structure L of the cover plate corrugated structure 201 is smaller than a thickness of the protective cover plate 20 at the main display area 100 a; meanwhile, in a direction in which the corner region 100d extends from the connection of the first side curved surface region 100B and the corner region 100d to the connection of the second side curved surface region 100c and the corner region 100d, the first thickness H1 of each invagination structure L (as shown at position B in fig. 7) of the cover plate corrugated structure 201 continuously decreases and then increases.

In the present embodiment, as shown in fig. 8, the second thickness H2 of the display element 80 at the position of the display element corrugated structure 801 is constant, in other words, the second thickness H2 of the display element 80 at the position of the display element corrugated structure 801 is uniform or almost constant. Furthermore, the second thickness H2 of the display element 80 at the position of the display element corrugated structure 801 is equal to or tends to be equal to the thickness of the display element 80 in the main display area 100 a.

It should be noted that, because the display panel 10 constituting the display assembly 80 has no compressibility and stretchability, and the first functional unit 30 and the second functional unit 40 are not significantly stretched or compressed in the process of attaching the display assembly 80 to the protective cover 20 before attachment, the display panel 10, the first functional unit 30, and the second functional unit 40 are not changed before and after attachment, so that the second thickness H2 of the display assembly 80 formed after attachment at the position of the display assembly wrinkle structure 801 is equal to or approximately equal to the thickness of the display assembly 80 before attachment.

In the present embodiment, as shown in fig. 4 and 7, at least a part of the cover plate corrugated structure 201 is located in the middle region where the corner region 100d extends from the junction of the corner region 100d and the first side curved surface region 100b to the junction of the corner region 100d and the second side curved surface region 100 c; correspondingly, as shown in fig. 5, 6 and 7, at least a portion of the display assembly corrugated structure 801 is located in the middle region of the corner region 100d extending from the junction of the corner region 100d and the first side curved region 100b to the junction of the corner region 100d and the second side curved region 100 c.

It should be noted that, as shown in fig. 9, it is a rainbow diagram of gaussian curvature distribution when the joint surface of the conventional protective cover plate at the corner is a gaussian curved surface. The conventional protective cover includes a flat surface portion S0, a first side curved surface portion S1, a second side curved surface portion S2, and a cover corner portion S3, the first side curved surface portion S1 and the second side curved surface portion S2 being connected to adjacent sides of the flat surface portion S0, and the cover corner portion S3 being connected between the first side curved surface portion S1 and the second side curved surface portion S2. The joint surface of the cover plate corner portion S3 has a first joint region D1, a second joint region D2, a third joint region D3, a fourth joint region D4, a fifth joint region D5, and a sixth joint region D6, and distances between the first joint region D1, the second joint region D2, the third joint region D3, the fourth joint region D4, the fifth joint region D5, and the sixth joint region D6 and the plane portion S0 are gradually increased.

The gaussian curvatures of the first to sixth bonding regions D1 to D6 are distributed such that the first bonding region D1 is blue, the second bonding region D2 is cyan, the third bonding region D3 is green, the fourth bonding region D4 is yellow, the fifth bonding region D5 is red, the sixth bonding region D6 is pink, and correspondingly, the gaussian curvatures of the first to sixth bonding regions D1 to D6 are increased in size. Further, the sixth bonding region D6 is located in the middle region of the bonding surface of the lid corner portion S3 in the direction in which the lid corner portion S3 extends from the junction of the first side curved surface portion S1 and the lid corner portion S3 to the junction of the second side curved surface portion S2 and the lid corner portion S3.

When the traditional protective cover plate is attached to the planar display assembly, the larger the Gaussian curvature of the attachment surface is, and the more easily the flat-plate-shaped display assembly is folded after being attached to the protective cover plate. The gaussian curvature of the sixth bonded region D6 farthest from the planar portion S0 of the protective cover is large, and the display element after bonding is more likely to be wrinkled.

In the display module 100 of the present embodiment, at least a portion of the cover plate folding structure 201 is located in the middle region of the corner region 100d extending from the connection of the corner region 100d and the first side curved surface region 100b to the connection of the corner region 100d and the second side curved surface region 100c, and the gaussian curvature of the middle region provided with the cover plate folding structure 201 is reduced, which is beneficial to guiding the display module 80 to form the display module folding structure 801 with smaller folding amplitude and volume in the middle region.

In the present embodiment, with reference to fig. 4 to fig. 7, the cover sheet corrugated structure 201 includes at least one cover sheet corrugated surface 201a. The display assembly corrugated structure 801 is shaped in the thickness direction of the display assembly 80, the display assembly corrugated structure 801 comprising at least one display assembly corrugated surface 801a and at least one display assembly corrugated back surface 801b. The at least one cover sheet corrugated surface 201a, the at least one display assembly corrugated surface 801a, and the at least one display assembly corrugated back surface 801b are all smooth arcuate surfaces.

The display module assembly fold structure 801 of the display module assembly of the embodiment of the application comprises a display module assembly fold back 801b and a display module fold curved surface 801a, so that the display module assembly fold structure 801 is curved and folded, and stress generated by folding of the display module assembly fold structure 801 is reduced.

It is understood that the cover panel corrugated structure 201 may also include a planar corrugated surface, and correspondingly, the display assembly corrugated structure 801 may also include a planar corrugated surface.

As shown in fig. 7, at least one display assembly corrugated surface 801a is located on one side of the display assembly corrugated structure 801 close to the protective cover 20, the at least one cover plate corrugated surface 201a and the at least one display assembly corrugated surface 801a are arranged in a one-to-one correspondence in the thickness direction of the corner area 100d of the display module 100, the at least one cover plate corrugated surface 201a and the at least one display assembly corrugated surface 801a are correspondingly attached and engaged, and the surface contour of each display assembly corrugated surface 801a is the same as the surface contour of the corresponding cover plate corrugated surface 201a.

As shown in fig. 6 and 7, at least one display assembly corrugated back surface 801b is located on a side of the display assembly corrugated structure 801 away from the protective cover 20, in other words, at least one display assembly corrugated back surface 801b is located on a back surface of at least one display assembly corrugated curved surface 801a, the at least one display assembly corrugated back surface 801b and the at least one display assembly corrugated curved surface 801a are arranged in a one-to-one correspondence in a thickness direction of the corner region 100d of the display assembly 80, and a corrugation direction of each display assembly corrugated back surface 801b is the same as that of the corresponding one display assembly corrugated surface 801 a.

It should be noted that, if one display assembly corrugated surface 801a is a convex curved surface with respect to the display assembly 80, one display assembly corrugated back surface 801b corresponding to one display assembly corrugated surface 801a is a concave curved surface with respect to the display assembly 80; if one display element corrugated surface 801a is a concave surface with respect to the display element 80, one display element corrugated back surface 801b corresponding to one display element corrugated surface 801a is a convex surface with respect to the display element 80.

The number of cover sheet corrugated surfaces 201a, display assembly corrugated surfaces 801a, and display assembly corrugated back surfaces 801b is the same. The number of the cover sheet corrugated surface 201a, the display assembly corrugated surface 801a, and the display assembly corrugated back surface 801b may be one, two, three, or more than three.

The greater the number of cover sheet corrugated surfaces 201a, the correspondingly greater the number of display element corrugated surfaces 801a and display element corrugated back surfaces 801b, such that the smaller the area and the magnitude of the corrugation of one display element corrugated surface 801a and one display element corrugated back surface 801b, the more beneficial the stress generated by the corrugation of the display element corrugated structure 801, but the more difficult the manufacture of the cover sheet corrugated structure 201.

When the number of the cover wrinkle curved surfaces 201a is two or more, the plurality of cover wrinkle curved surfaces 201a are arranged at intervals, the corner joint curved surface 20a is arranged between two cover wrinkle curved surfaces 201a at intervals, correspondingly, the plurality of display assembly wrinkle curved surfaces 801a are arranged at intervals, the plurality of display assembly wrinkle back surfaces 801b are also arranged at intervals, and the surfaces of the display assembly corner portions 802 are respectively arranged between two adjacent display assembly wrinkle curved surfaces 801a and between two adjacent display assembly wrinkle back surfaces 801b, so that the plurality of display assembly wrinkle curved surfaces 801a and the plurality of display assembly wrinkle back surfaces 801b are formed at intervals. It is understood that at least two cover sheet corrugated surfaces 201a may also be in contact such that at least two display assembly corrugated surfaces 801a are formed continuously while at least two display assembly corrugated back surfaces 801b are also formed continuously.

In the present embodiment, as shown in fig. 4, 7 and 8, the at least one cover fold curved surface 201a includes at least one cover fold invagination curved surface, which invaginates in a direction away from the display assembly 80; as shown in fig. 5, 7 and 8, the at least one display assembly wrinkle curved surface 801a includes at least one display assembly wrinkle convex curved surface protruding in a direction close to the protective cover sheet 20, and the at least one display assembly wrinkle convex curved surface is engaged with the at least one cover sheet wrinkle concave curved surface in a one-to-one correspondence.

Specifically, referring to fig. 4 and 7, when one cover sheet corrugated structure 201 includes three inward recessed structures L recessed relative to the corner joint curved surface 20a and disposed at intervals, one cover sheet corrugated structure 201 includes three cover sheet corrugated curved surfaces 201a disposed at intervals, each inward recessed structure L includes one cover sheet corrugated curved surface 201a, a corner joint curved surface 20a is disposed between two adjacent cover sheet corrugated curved surfaces 201a disposed at intervals, and a first thickness H1 of the protective cover sheet 20 at the position of the inward recessed structure L is smaller than a thickness of the protective cover sheet 20 in the main display area 100a, so that the first thickness H1 of the protective cover sheet 20 at the position of the cover sheet corrugated inward recessed curved surface is smaller than the thickness of the protective cover sheet 20 in the main display area 100 a.

The three spaced cover plate wrinkle curved surfaces 201a include a first cover plate wrinkle invagination curved surface 201a1, a second cover plate wrinkle invagination curved surface 201a2 and a third cover plate wrinkle invagination curved surface 201a3, the second cover plate wrinkle invagination curved surface 201a2 is located between the first cover plate wrinkle invagination curved surface 201a1 and the third cover plate wrinkle invagination curved surface 201a3, and the first cover plate wrinkle invagination curved surface 201a1, the second cover plate wrinkle invagination curved surface 201a2 and the third cover plate wrinkle invagination curved surface 201a3 are all invaginated towards the direction far away from the display component 80.

The second cover plate wrinkle invagination curved surface 201a2 is located in the middle region of the corner region 100d extending from the junction of the corner region 100d and the first side curved surface region 100b to the junction of the corner region 100d and the second side curved surface region 100c, and the second cover plate wrinkle invagination curved surface 201a2 extends from the junction of the main display region 100a and the corner region 100d to the edge of the corner region 100d away from the main display region 100a, and the second cover plate wrinkle invagination curved surface 201a2 has a second invagination surface.

First apron fold invagination curved surface 201a1 and third apron fold invagination curved surface 201a3 set up in the relative both sides of second apron fold invagination curved surface 201a2 respectively symmetrically, first apron fold invagination curved surface 201a1 and third apron fold invagination curved surface 201a3 also extend to the edge that main display area 100a was kept away from to corner district 100d from main display area 100a and corner district 100d junction, first apron fold invagination curved surface 201a1 has first invagination surface, third apron fold invagination curved surface 201a3 has third invagination surface, the area of first invagination surface equals the area of third invagination surface, the area of second invagination surface is greater than the area of third invagination surface.

It will be appreciated that the area of the first recessed surface may be different from the area of the third recessed surface, and the area of the second recessed surface may be equal to the area of the third recessed surface.

Referring to fig. 5, 7 and 8, the display device corrugated structure 801 includes three display device corrugated curved surfaces 801a arranged at intervals, the three display device corrugated curved surfaces 801a arranged at intervals are located on one side of the display device 80 near the protective cover 20 in the corner region 100d and protrude in a direction near the protective cover 20, the three display device corrugated curved surfaces 801a arranged at intervals include a first display device corrugated convex curved surface 801a1, a second display device corrugated convex curved surface 801a2 and a third display device corrugated convex curved surface 801a3, the second display device corrugated convex curved surface 801a2 is located between the first display device corrugated convex curved surface 801a1 and the third display device corrugated convex curved surface 801a3, and the first display device corrugated convex curved surface 801a1, the second display device corrugated convex curved surface 801a2 and the third display device corrugated convex curved surface 801a3 all protrude in a direction near the protective cover 20.

The second display element corrugated convex curved surface 801a2 is located in the corner area 100d and extends from the connection of the corner area 100d and the first side curved surface area 100b to the middle area of the connection of the corner area 100d and the second side curved surface area 100c, and the second display element corrugated convex curved surface 801a2 extends from the connection of the main display area 100a and the corner area 100d to the edge of the corner area 100d away from the main display area 100 a. The second display assembly wrinkle convex curved surface 801a2 and the second cover plate wrinkle concave curved surface 201a2 are correspondingly arranged in the thickness direction of the corner area 100d and are mutually engaged. The surface profile of the second display assembly wrinkle convex curved surface 801a2 is the same as the surface profile of the second cover sheet wrinkle concave curved surface 201a 2. The second display component fold convex curved surface is provided with a second convex surface, and the area of the second convex surface is equal to that of the second concave surface.

The first display assembly corrugated convex curved surface 801a1 and the third display assembly corrugated convex curved surface 801a3 are respectively and symmetrically disposed on two opposite sides of the second display assembly corrugated convex curved surface 801a2, and both extend from a connection point of the main display area 100a and the corner area 100d to an edge of the corner area 100d away from the main display area 100 a. The first display assembly wrinkle convex curved surface 801a1 and the first cover plate wrinkle concave curved surface 201a1 are correspondingly arranged in the thickness direction of the corner region 100d and are mutually occluded, the surface profile of the first display assembly wrinkle convex curved surface 801a1 is the same as that of the first cover plate wrinkle concave curved surface 201a1, the first display assembly wrinkle convex curved surface 801a1 is provided with a first convex surface, and the area of the first convex surface is equal to that of the first concave surface. The third display assembly wrinkle convex curved surface 801a3 and the third cover plate wrinkle concave curved surface 201a3 are correspondingly arranged in the thickness direction of the corner area 100d and are mutually engaged, the surface profile of the third display assembly wrinkle convex curved surface 801a3 is the same as that of the third cover plate wrinkle concave curved surface 201a3, the third display assembly wrinkle convex curved surface 801a3 has a third convex surface, and the area of the third convex surface is equal to that of the third concave surface.

Referring to fig. 6 and 7, the display device corrugated structure 801 further includes three display device corrugated backs 801b disposed at intervals, the three display device corrugated backs 801b disposed at intervals are located on a side of the display device 80 away from the protective cover 20 in the corner region 100d, the three display device corrugated backs 801b disposed at intervals include a first display device corrugated inward-concave back 801b1, a second display device corrugated inward-concave back 801b2, and a third display device corrugated inward-concave back 801b3, the second display device corrugated inward-concave back 801b2 is located between the first display device corrugated inward-concave back 801b1 and the third display device corrugated inward-concave back 801b3, and the first display device corrugated inward-concave back 801b1, the second display device corrugated inward-concave back 801b2, and the third display device corrugated inward-concave back 801b3 are inwardly concave in a direction close to the protective cover 20.

The second display element fold recess back surface 801b2 is located in the corner region 100d extending from the junction of the corner region 100d and the first side curved region 100b to the middle region of the junction of the corner region 100d and the second side curved region 100c, and the second display element fold recess back surface 801b2 is located on the back of the second display element fold recess curved surface 801a 2. The first display element fold concave back 801b1 is located on the back of the first display element fold convex curved surface 801a 1. The third display element fold concave back 801b3 is located on the back of the third display element fold convex curve 801a 3.

In the embodiment, the second thickness H2 of the display element 80 at the position of the display element wrinkle structure 801 is equal to the thickness of the display element 80 in the main display area 100a, so that the second thickness H2 of the display element 80 at the positions of the first to third display element wrinkle convex curved surfaces 801a1 to 801a3 is equal to the thickness of the display element 80 in the main display area 100a

The display module assembly of this application embodiment is all less than the area of the second invagination surface of second apron fold invagination curved surface 201a2 through the area of the first invagination surface of first apron fold invagination curved surface 201a1 and the area of the third invagination surface of third apron fold invagination curved surface 201a3 to reduce the gaussian curvature in the middle area of second apron fold invagination curved surface 201a2 place, correspond, more be favorable to reducing by apron fold structure 201 guide and the display module fold structure 801's that forms the area of pleating.

It should be noted that the cover wrinkle curved surface 201a on the protective cover 20 in the display module of the present embodiment is an invaginated curved surface, and the cover wrinkle curved surface 201a is obtained by thinning the protective cover 20.

In this embodiment, as shown in fig. 4, a first chamfering structure 20b is disposed at a connection between the cover plate wrinkle structure 201 and the corner attaching curved surface 20a, the first chamfering structure 20b is a smooth curved surface, and the first chamfering structure 20b is tangent to both the corner attaching curved surface 20a and the cover plate wrinkle structure 201, so as to realize smooth transition at the connection between the cover plate wrinkle structure 201 and the corner attaching curved surface 20 a; correspondingly, as shown in fig. 5 and 6, a second chamfer structure 803 is provided at the joint of the display assembly corner portion 802 and the display assembly corrugated structure 801, and the second chamfer structure 803 is a smooth curved surface structure so as to realize a smooth transition at the joint of the display assembly corner portion 802 and the display assembly corrugated structure 801.

It should be noted that the first chamfer structure 20b is formed by a chamfer process along a connection between the cover plate corrugated structure 201 and the corner fitting curved surface 20a, and a part of the first chamfer structure 20b is located on the cover plate corrugated structure 201. The second chamfer structure 803 is formed by a chamfering process along the connection between the display assembly corner 802 and the display assembly corrugated structure 801, and a portion of the second chamfer structure 803 is located on the display assembly corrugated structure 801.

As shown in fig. 4, a first U-shaped connecting section 201b is provided at a connection position of the cover plate corrugated structure 201 and the first chamfer structure 20b, and an opening of the first U-shaped connecting section 201b faces an edge of the corner area 100d away from the main display area 100a and extends to an edge of the corner area 100d away from the main display area 100 a; the display assembly corrugated structure 801 and the second chamfer structure 803 are connected to form a second U-shaped connecting section 801c, the opening of the second U-shaped connecting section 801c faces the edge of the corner area 100d away from the main display area 100a, the second U-shaped connecting section 801c extends to the edge of the corner area 100d away from the main display area 100a, and the shape of the second U-shaped connecting section 801c is the same as that of the first U-shaped connecting section 201 b. The first U-shaped connecting section 201b and the second U-shaped connecting section 801c may be symmetrical U-shaped sections, but are not limited thereto, and the first U-shaped connecting section 201b and the second U-shaped connecting section 801c may also be asymmetrical U-shaped sections.

Referring to fig. 7, the first functional unit 30 includes a first functional unit corrugated structure 301 engaged with the cover plate corrugated structure 201 in the corner area 100d, a surface of the first functional unit corrugated structure 301 in contact with the cover plate corrugated structure 201 is convex with respect to the first functional unit 30, a surface of the first functional unit corrugated structure 301 in contact with the cover plate corrugated structure 201 is a display assembly corrugated surface 801a, and a surface contour of the first functional unit corrugated structure 301 in contact with the cover plate corrugated structure 201 is the same as a surface contour of the cover plate corrugated structure 201.

The display panel 10 includes a display panel wrinkle structure 101 engaged with the first functional unit wrinkle structure 301 in the corner region 100d, a surface of the first functional unit wrinkle structure 301 in contact with the display panel wrinkle structure 101 is recessed with respect to the first functional unit 30, a surface of the display panel wrinkle structure 101 in contact with the first functional unit wrinkle structure 301 is raised with respect to the display panel 10, and a surface profile of a surface of the first functional unit wrinkle structure 301 in contact with the display panel wrinkle structure 101 is the same as a surface profile of a surface of the display panel wrinkle structure 101 in contact with the first functional unit wrinkle structure 301.

The second functional unit 40 comprises a second functional unit corrugated structure 401 in a corner area 100d, which engages with the display panel corrugated structure 101. The surface of the second function unit pleat structure 401 in contact with the display panel pleat structure 101 is convex relative to the second function unit 40, the surface profile of the surface of the second function unit pleat structure 401 in contact with the display panel pleat structure 101 is the same as the surface profile of the surface of the display panel pleat structure 101 in contact with the second function unit pleat structure 401, the surface of the second function unit pleat structure 401 away from the display panel 10 is a display assembly pleat back 801b, and the display assembly pleat back 801b is concave relative to the second function unit 40.

Referring to fig. 10, 11, 12 and 13, fig. 10 is an enlarged view of a side of a protective cover plate of a display module according to another embodiment of the present disclosure near a display element in a corner region and a periphery of the corner region, fig. 11 is an enlarged view of a side of a display element of a display module according to another embodiment of the present disclosure near a protective cover plate in a periphery of a corner region and a periphery of the corner region, fig. 12 is a schematic cross-sectional view of a display module according to another embodiment of the present disclosure in a thickness direction of a corner region in a direction in which the corner region extends from a junction of a first curved surface region and the corner region to a junction of a second curved surface region and the corner region, and fig. 13 is a schematic cross-sectional view of a display module according to another embodiment of the present disclosure in a thickness direction of a main display region, a cover plate corrugated structure, and a display element corrugated structure in a thickness direction of a corner region in a direction in which the corner region extends from a junction of the main display region and the corner region to an edge of the corner region away from the main display region.

The display module of this embodiment is substantially similar to the display module shown in fig. 1, and the same points are not repeated, but the differences include that the cover plate folding structure 201 includes at least one protrusion structure T, the at least one protrusion structure T protrudes toward a direction close to the display component 80, a third thickness H3 of the protection cover plate 20 at a position where the protrusion structure T is located increases progressively toward a direction close to an edge of the corner area 100d away from the main display area 100a, and meanwhile, in a direction in which the corner area 100d extends from a connection point of the first side curved area 100b and the corner area 100d to a connection point of the second side curved area 100c and the corner area 100d, the third thickness H3 of the protection cover plate 20 at the position where the protrusion structure T is located continuously increases progressively first and then decreases progressively.

In addition, when the cover plate corrugated structure 201 includes at least one convex structure T, each convex structure T includes a cover plate corrugated curved surface 201a, each cover plate corrugated curved surface 201a is a cover plate corrugated convex curved surface, the cover plate corrugated convex curved surface protrudes toward a direction close to the display component 80, a third thickness H3 of the protective cover plate 20 at a position of the cover plate corrugated convex curved surface is a third thickness H3 of the protective cover plate 20 at a position of the convex structure T, and the third thickness H3 of the protective cover plate 20 at the position of the convex structure T is greater than the thickness of the protective cover plate 20 at the main display area 100 a; the at least one display element corrugated surface 801a includes at least one display element corrugated inwardly concave surface that is inwardly concave in a direction away from the protective cover sheet 20, and at least one cover sheet corrugated convexly curved surface that is engaged with the at least one display element corrugated inwardly concave surface in a one-to-one manner.

Specifically, as shown in fig. 10 and 12, the at least one cover sheet wrinkle curved surface 201a includes a first cover sheet wrinkle convex curved surface 201a4 and a second cover sheet wrinkle convex curved surface 201a5 which are arranged at intervals, the first cover sheet wrinkle convex curved surface 201a4 and the second cover sheet wrinkle convex curved surface 201a5 protrude with respect to the protective cover sheet 20, both the first cover sheet wrinkle convex curved surface 201a4 and the second cover sheet wrinkle convex curved surface 201a5 protrude toward the display assembly 80, and the first cover sheet wrinkle convex curved surface 201a4 and the second cover sheet wrinkle convex curved surface 201a5 are symmetrically arranged at two opposite sides of the corner area 100d extending from the connection of the first side curved surface area 100b and the corner area 100d to the middle position of the connection of the second side curved surface area 100c and the corner area 100d, respectively.

As shown in fig. 11 and 12, the at least one display assembly folding curved surface 801a includes a first display assembly folding inwardly-recessed curved surface 801a4 and a second display assembly folding inwardly-recessed curved surface 801a5 which are disposed at intervals, the first display assembly folding inwardly-recessed curved surface 801a4 and the second display assembly folding inwardly-recessed curved surface 801a5 are recessed relative to the display assembly 80, the first display assembly folding inwardly-recessed curved surface 801a4 and the second display assembly folding inwardly-recessed curved surface 801a5 are recessed in a direction away from the protective cover 20, and the first display assembly folding inwardly-recessed curved surface 801a4 and the second display assembly folding inwardly-recessed curved surface 801a5 are symmetrically disposed on two opposite sides of the corner area 100d, which extends from a connection of the first side curved surface area 100b and the corner area 100d to a middle position of a connection of the second side curved surface area 100c and the corner area 100d, respectively. The first display element fold inwardly-recessed curved surface 801a4 and the first cover plate fold convexly-curved surface 201a4 are correspondingly arranged and mutually engaged in the thickness direction of the corner area 100d of the display module 100, and the second display element fold inwardly-recessed curved surface 801a5 and the second cover plate fold convexly-curved surface 201a5 are correspondingly arranged and mutually engaged in the thickness direction of the corner area 100d of the display module 100.

In this embodiment, the differences further include: the surface of the first function unit pleat structure 301 in contact with the cover plate pleat structure 201 is recessed relative to the first function unit 30, the surface of the first function unit pleat structure 301 in contact with the display panel pleat structure 101 is protruded relative to the first function unit 30, the surface of the display panel pleat structure 101 in contact with the first function unit pleat structure 301 is recessed relative to the display panel 10, the surface of the display panel pleat structure 101 in contact with the second function unit pleat structure 401 is protruded relative to the display panel 10, and the surface of the second function unit pleat structure 401 in contact with the display panel pleat structure 101 is recessed relative to the second function unit 40.

In the embodiment of the present application, the cover plate wrinkle structure 201 of the protective cover plate 20 of the display module 100 protrudes toward the direction close to the display element 80, and the display element wrinkle structure 801 of the display element 80 sinks toward the direction away from the protective cover plate 20.

Referring to fig. 14, 15 and 16, fig. 14 is an enlarged schematic view of a side of a protective cover of a display module according to still another embodiment of the present disclosure, which is close to a display element, at a corner region and a periphery of the corner region, fig. 15 is an enlarged schematic view of a side of a display element of a display module according to still another embodiment of the present disclosure, which is close to a protective cover, at a corner region and a periphery of the corner region, and fig. 16 is a schematic cross-sectional view of a display module according to still another embodiment of the present disclosure, which is along a thickness direction of the corner region, in a direction in which the corner region extends from a junction of a first curved surface region and the corner region to a junction of a second curved surface region and the corner region.

The display module of this embodiment is substantially similar to the display module shown in fig. 1, and the same parts are not repeated, but the differences include that in this embodiment, the cover plate folding structure 201 includes at least one protrusion structure T and at least one recessed structure L, the at least one protrusion structure T protrudes toward a direction close to the display module 80, the at least one recessed structure L is recessed toward a direction away from the display module 80, a first thickness H1 degree of the protective cover plate 20 at a position of the recessed structure L decreases toward a direction close to an edge of the corner area 100d away from the main display area 100a, a third thickness H3 of the protective cover plate 20 at the position of the protrusion structure T increases toward a direction close to the edge of the corner area 100d away from the main display area 100a, the first thickness H1 of the protective cover plate 20 at the position of the recessed structure L is smaller than the thickness of the protective cover plate 20 at the main display area 100a, and the third thickness H3 of the protective cover plate at the position of the protrusion structure T is greater than the thickness of the protective cover plate 20 at the main display area 100 a; meanwhile, in the direction in which the corner area 100d extends from the connection between the first side curved surface area 100b and the corner area 100d to the connection between the second side curved surface area 100c and the corner area 100d, the third thickness H3 of the protective cover plate 20 at the position of the protruding structure T continuously increases first and then decreases gradually, and the thickness of the protective cover plate 20 at the position of the recessed structure L continuously decreases first and then increases gradually.

When the cover sheet corrugated structure 201 includes both the convex structure T protruding from the corner curved surface 20a and the concave structure L recessed from the corner curved surface 20a, the convex structure T and the concave structure L may be provided at intervals on the corner curved surface 20a or may be provided continuously.

In addition, when the cover sheet corrugated structure 201 includes at least one convex structure T and at least one concave structure L, each convex structure T includes a cover sheet corrugated convex curved surface protruding toward a direction close to the display assembly 80, each concave structure L includes a cover sheet corrugated concave curved surface recessed toward a direction away from the display assembly 80, and the at least one cover sheet corrugated convex curved surface and the at least one cover sheet corrugated concave curved surface are arranged at intervals; meanwhile, the plurality of display assembly wrinkle curved surfaces simultaneously comprise at least one display assembly wrinkle convex curved surface and at least one display assembly wrinkle concave curved surface, the display assembly wrinkle concave curved surface sinks towards the direction far away from the protective cover plate 20, the display assembly wrinkle convex curved surface protrudes towards the direction close to the protective cover plate 20, the at least one cover plate wrinkle convex curved surface is meshed with the at least one display assembly wrinkle concave curved surface one to one, and the at least one display assembly wrinkle convex curved surface is meshed with the at least one cover plate wrinkle concave curved surface one to one.

Specifically, as shown in fig. 14 and 16, the plurality of cover sheet wrinkle curved surfaces 201a include a first cover sheet wrinkle inwardly concave curved surface 201a1, a second cover sheet wrinkle inwardly concave curved surface 201a2, a third cover sheet wrinkle inwardly concave curved surface 201a3, a first cover sheet wrinkle convex curved surface 201a4, and a second cover sheet wrinkle convex curved surface 201a5, the second cover sheet wrinkle inwardly concave curved surface 201a2 is located between the first cover sheet wrinkle convex curved surface 201a4 and the second cover sheet wrinkle convex curved surface 201a5, the first cover sheet wrinkle inwardly concave curved surface 201a1 is located on a side of the second cover sheet wrinkle convex curved surface 201a5 away from the second cover sheet wrinkle inwardly concave curved surface 201a2, and the third cover sheet wrinkle inwardly concave curved surface 201a3 is located on a side of the first cover sheet wrinkle convex curved surface 201a4 away from the second cover sheet wrinkle inwardly concave curved surface 201a 2. The first cover sheet fold invagination curved surface 201a1, the second cover sheet fold invagination curved surface 201a2, and the third cover sheet fold invagination curved surface 201a3 shown in fig. 14 are respectively the same as the first cover sheet fold invagination curved surface 201a1, the second cover sheet fold invagination curved surface 201a2, and the third cover sheet fold invagination curved surface 201a3 shown in fig. 4, and are not repeated here. The first cover fold convex curved surface 201a4 and the second cover fold convex curved surface 201a5 shown in fig. 14 are respectively the same as the first cover fold convex curved surface 201a4 and the second cover fold convex curved surface 201a5 shown in fig. 10, and the description thereof is omitted.

As shown in fig. 15 and 16, the plurality of display assembly wrinkle curved surfaces 801a includes a first display assembly wrinkle convex curved surface 801a1, a second display assembly wrinkle convex curved surface 801a2, a third display assembly wrinkle convex curved surface 801a3, a first display assembly wrinkle concave curved surface 801a4, and a second display assembly wrinkle concave curved surface 801a5, the second display assembly wrinkle convex curved surface 801a2 is located between the first display assembly wrinkle concave curved surface 801a4 and the second display assembly wrinkle concave curved surface 801a5, the first display assembly wrinkle convex curved surface 801a1 is located on a side of the second display assembly wrinkle concave curved surface 801a5 away from the second display assembly wrinkle convex curved surface 801a2, and the third display assembly wrinkle convex curved surface 801a3 is located on a side of the first display assembly wrinkle concave curved surface 801a4 away from the second display assembly wrinkle convex curved surface 801a 2. The first display element wrinkle convex curved surface 801a1, the second display element wrinkle convex curved surface 801a2, and the third display element wrinkle convex curved surface 801a3 in fig. 15 are respectively the same as the first display element wrinkle convex curved surface 801a1, the second display element wrinkle convex curved surface 801a2, and the third display element wrinkle convex curved surface 801a3 in fig. 5, and are not repeated herein. The first display assembly fold recessed curved surface 801a4 and the second display assembly fold recessed curved surface 801a5 in fig. 15 are respectively the same as the first display assembly fold recessed curved surface 801a4 and the second display assembly fold recessed curved surface 801a5 in fig. 11, and are not repeated herein.

As shown in fig. 16, the first display assembly wrinkle convex curved surface 801a1 is disposed corresponding to and engaged with the first cover plate wrinkle concave curved surface 201a1 in the thickness direction of the corner area 100d of the display module 100. The second display assembly wrinkle convex curved surface 801a2 is disposed corresponding to and occluded with the second cover plate wrinkle concave curved surface 201a2 in the thickness direction of the corner area 100d of the display module 100. The third display element wrinkle convex curved surface 801a3 is disposed corresponding to and engaged with the third cover plate wrinkle concave curved surface 201a3 in the thickness direction of the corner area 100d of the display module. The first display assembly wrinkle inward curved surface 801a4 is disposed corresponding to and occluded with the first cover plate wrinkle outward curved surface 201a4 in the thickness direction of the corner area 100d of the display module 100. The second display element fold concave curved surface 801a5 is disposed corresponding to and engaged with the second cover fold convex curved surface 201a5 in the thickness direction of the corner area 100d of the display module 100.

The display module assembly 100 in the embodiment of the present application includes that the cover plate fold structure 201 of the protective cover plate 20 includes a cover plate fold invagination curved surface and a cover plate fold bulging curved surface, and correspondingly, the display assembly fold structure includes a display assembly fold invagination curved surface engaged with the cover plate fold invagination curved surface and a display assembly fold invagination curved surface engaged with the cover plate fold invagination curved surface.

It should be noted that the cover sheet fold inward-concave curved surfaces and the cover sheet fold convex curved surfaces may be alternately arranged as in this embodiment, or one or more cover sheet fold convex curved surfaces may be arranged between two or more cover sheet fold inward-concave curved surfaces, or one or more cover sheet fold inward-concave curved surfaces may be arranged between two or more cover sheet fold convex curved surfaces. Similarly, the arrangement mode between the display assembly fold convex curved surface and the display assembly fold concave curved surface is not limited to one-to-one alternate arrangement.

In addition, the application also provides a method for manufacturing the display module. The manufacturing method of the display module comprises the following steps:

s10: and providing a display component to be attached, wherein the display component to be attached is flat.

Specifically, referring to fig. 17, a planar display panel 50 to be bonded, a planar first functional unit 60 to be bonded, and a planar second functional unit 90 to be bonded are provided, the display panel 50 to be bonded is a flat flexible display panel, the first functional unit 60 to be bonded is a flat transparent optical adhesive layer, and the second functional unit 90 to be bonded includes a flat back plate and a transparent optical adhesive layer on the surface of the back plate; the first functional unit 60 to be attached is attached to the light emitting surface of the display panel 50 to be attached, the second functional unit 90 to be attached is attached to the back surface of the light emitting surface of the display panel 50 to be attached, and the transparent optical adhesive layer of the second functional unit 90 to be attached is in contact with the display panel 50 to be attached, so as to obtain the flat display module 110 to be attached, as shown in fig. 18.

S20: providing a protective cover plate, wherein the protective cover plate is provided with at least one first cover plate side curved surface area, at least one second cover plate side curved surface area and at least one cover plate corner area, one cover plate corner area is connected between the adjacent first cover plate side curved surface area and one second cover plate side curved surface area, the protective cover plate comprises a cover plate folding structure, and the cover plate folding structure is positioned on the binding surface of the protective cover plate on the cover plate corner area.

Specifically, as shown in fig. 19 and 20, fig. 19 is a schematic perspective view of a protective cover plate according to an embodiment of the present application, and fig. 20 is a schematic partial enlarged view of the protective cover plate shown in fig. 19 at a point A3. The protective cover 20 has two first cover side curved regions 20d, two second cover side curved regions 20e, a cover middle region 20c, and four cover corner regions 20f, the two first cover side curved regions 20d are connected to first and second opposite sides of the cover middle region 20c, the two second cover side curved regions 20e are connected to third and fourth opposite sides of the cover middle region 20c, the first side of the cover middle region 20c is adjacent to the third and fourth sides of the cover middle region 20c, the cover middle region 20c is planar, and the two first cover side curved regions 20d and the two second cover side curved regions 20e are curved. Each flap corner region 20f is connected between adjacent one of the first flap side curved regions 20d and one of the second flap side curved regions 20 e.

The protective cover 20 is a transparent four-curved cover. The protective cover plate 20 may be made of a material including, but not limited to, glass, and may also include a transparent polymer.

The protective cover plate 20 includes an accommodating cavity 20g enclosed by two first cover plate side curved surface regions 20d, two second cover plate side curved surface regions 20e, a cover plate middle region 20c, and four cover plate corner regions 20f, the accommodating cavity 20g includes an attaching surface 20h for attaching to the display component 110 to be attached, and the attaching surface 20h is located in the two first cover plate side curved surface regions 20d, the two second cover plate side curved surface regions 20e, the cover plate middle region 20c, and the four cover plate corner regions 20f. The protective cover 20 comprises a cover corrugation 201 on the abutment surface 20h of the cover corner region 20f, the cover corrugation 201 protruding with respect to the protective cover 20.

In the present embodiment, the thickness of the protective cover 20 in the first cover side curved surface region 20d, the two second cover side curved surface regions 20e and the cover middle region 20c is equal, and the thickness of the protective cover 20 at the position of the cover corrugated structure 201 is greater than the thickness of the protective cover 20 in the cover middle region 20 c.

It is understood that in other embodiments, the cover sheet corrugated structure 201 may be recessed relative to the protective cover sheet 20, and at this time, the thickness of the protective cover sheet 20 at the position of the cover sheet corrugated structure 201 is smaller than the thickness of the protective cover sheet 20 at the cover sheet middle region 20 c; alternatively, a part of the cover pleated structure 201 protrudes with respect to the protective cover 20, and another part of the cover pleated structure 201 is recessed with respect to the protective cover 20, and at this time, a thickness of a part of the protective cover 20 at the position of the cover pleated structure 201 is greater than a thickness of the protective cover 20 at the cover middle region 20c, and a thickness of another part of the protective cover 20 at the position of the cover pleated structure 201 is less than a thickness of the protective cover 20 at the cover middle region 20 c.

S30: providing a bonding jig, wherein the bonding jig is provided with at least one first side supporting curved surface area, at least one second side supporting curved surface area and at least one supporting corner curved surface area, one supporting corner curved surface area is connected between the adjacent first side supporting curved surface area and the adjacent second side supporting curved surface area, the bonding jig comprises a jig wrinkle structure, the jig wrinkle structure is positioned on the supporting surface of the bonding jig for supporting the corner curved surface area, and the jig wrinkle structure is matched with the cover plate wrinkle structure.

Specifically, as shown in fig. 21 and 22, fig. 21 is a schematic perspective view of a bonding jig according to an embodiment of the present application, and fig. 22 is a partially enlarged schematic view of the bonding jig shown in fig. 21 at a position A4. The bonding jig 70 includes a supporting portion 701 and a jig base 702, and the supporting portion 701 is disposed on the jig base 702. The bonding jig 70 is a silicone jig. It is understood that the bonding jig 70 may be a glass jig.

The supporting portion 701 includes a middle supporting region 701a, two first side supporting curved regions 701b, two second side supporting curved regions 701c, and four corner supporting curved regions 701d. The middle support region 701a is planar and rectangular. One first side supporting curved region 701b is connected to a first side of the middle supporting region 701a, the other first side supporting curved region 701b is connected to a third side of the middle supporting region 701a, the first side of the middle supporting region 701a is opposite to the third side of the middle supporting region 701a, and both first side supporting curved regions 701b are curved supporting regions. One second side supporting curved region 701c is connected to the second side of the middle supporting region 701a, the other second side supporting curved region 701c is connected to the fourth side of the middle supporting region 701a, the second side of the middle supporting region 701a is opposite to the fourth side of the middle supporting region 701a and is adjacent to the first side of the middle supporting region 701a, the fourth side of the middle supporting region 701a is adjacent to the third side of the middle supporting region 701a, and both the two second side supporting curved regions 701c are curved supporting regions. Each supporting corner curved region 701d is connected between a first side supporting curved region 701b and a second side supporting curved region 701c which are adjacent to each other, and is connected with the middle supporting region 701a, and each supporting corner curved region 701d is curved. The supporting portion 701 has a supporting surface 701e for supporting the member to be attached, and the supporting surface 701e is located in a middle supporting region 701a, two first side supporting curved surface regions 701b, two second side supporting curved surface regions 701c, and four supporting corner curved surface regions 701d. The attaching jig 70 is provided with a jig wrinkle structure 703 on a supporting surface 701e supporting the corner curved surface region 701d, the jig wrinkle structure 703 is recessed relative to the attaching jig 70, and the jig wrinkle structure 703 is adapted to the cover plate wrinkle structure 201.

Referring to fig. 20 and 22, the cover plate corrugated structure 201 in fig. 20 includes three convex structures, the jig corrugated structure 703 in fig. 22 includes three recessed structures, the three convex structures in fig. 20 are complementary to the three recessed structures in fig. 22 one-to-one, and each convex structure can be accommodated in one recessed structure.

In the present application, "fit" means that the two fit each other have a completely or partially complementary structure.

S40: and placing the display assembly to be attached on the attaching jig.

Specifically, the display module 110 to be attached is placed on the supporting surface 701e of the supporting portion 701.

S50: the protection cover plate is placed on a display component to be attached, the cover plate fold structure of the cover plate corner area and the jig fold structure of the support corner curved surface area are arranged correspondingly, a first cover plate side curved surface area corresponds to a first side support curved surface area, a second cover plate side curved surface area corresponds to a second side support curved surface area, the protection cover plate and the display component to be attached are pressed under the support effect of an attachment jig, the display component to be attached forms a display component fold structure under the effect of the jig fold structure and the cover plate fold structure which are matched in the pressing process, and the display component fold structure is engaged with the jig fold structure and the cover plate fold structure.

Specifically, the bonding surface 20h of the protective cover plate 20 is bonded to the display component 110 to be bonded, the cover plate middle area 20c of the protective cover plate 20 is disposed corresponding to the middle support area 701a of the bonding jig 70, the two first cover plate side curved surface areas 20d of the protective cover plate 20 are disposed corresponding to the two first side support curved surface areas 701b of the bonding jig 70 one to one, the two second cover plate side curved surface areas 20e of the protective cover plate 20 are disposed corresponding to the two second side support curved surface areas 701c of the bonding jig 70 one to one, the four cover plate corner areas 20f and the four support corner curved surface areas 701d of the protective cover plate 20 are disposed corresponding to one, the recessed jig wrinkle structure 703 and the raised cover plate wrinkle structure 201 are disposed corresponding to pressurize the protective cover plate 20, the display component 110 to be bonded is formed into a display component under the combined action of the matched jig wrinkle structure 703 and cover plate wrinkle structure 201, and the display component includes a display component wrinkle structure, and the jig wrinkle structure 703 and the cover plate wrinkle structure 201 are all bonded.

S60: and removing the bonding jig to obtain the display module.

Specifically, the attaching jig 70 is removed to obtain the display module.

The above description of the embodiments is only for assisting understanding of the technical solutions and their core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. A display module is characterized by comprising a main display area, at least one first side curved surface area, at least one second side curved surface area and at least one corner area, wherein the adjacent first side curved surface area and the second side curved surface area are respectively connected to two adjacent sides of the main display area, at least one corner area is connected with one main display area, one corner area is connected between the adjacent first side curved surface area and the adjacent second side curved surface area, and the display module comprises a protective cover plate and a display component attached to the protective cover plate;

2. The display module of claim 1, wherein at least a portion of the cover sheet corrugated structure is located at an edge of the corner region away from the main display region, and at least a portion of the display assembly corrugated structure is located at an edge of the corner region away from the main display region.

3. The display module of claim 2, wherein the cover sheet corrugation structure extends from a connection between the main display area and the corner area to an edge of the corner area away from the main display area;

the display component fold structure extends from the connection part of the main display area and the corner area to the edge of the corner area far away from the main display area.

4. The display module of claim 2, wherein at least a portion of the cover sheet corrugated structure has a corrugation amplitude that increases toward an edge of the corner region away from the main display region;

the magnitude of the pleating of at least part of the display assembly pleat structure increases towards the edge of the corner region away from the main display region.

5. The display module assembly according to claim 4, wherein the cover plate folding structure comprises at least one protrusion structure, the at least one protrusion structure protrudes in a direction approaching the display module assembly, and a thickness of the protective cover plate at a position of the protrusion structure increases in a direction approaching an edge of the corner region away from the main display region; and/or the presence of a gas in the atmosphere,

the cover plate fold structure comprises at least one invagination structure, the at least one invagination structure invaginates towards the direction far away from the display assembly, and the thickness of the protective cover plate at the position of the invagination structure decreases towards the direction close to the edge of the corner area far away from the main display area;

the thickness of the display element is constant at the location of the display element corrugation structure.

6. The display module according to claim 1 or 4, wherein in a direction in which the corner region extends from a junction of the first side curved region and the corner region to a junction of the second side curved region and the corner region,

the folding amplitude of at least part of the cover plate folding structure is continuously increased and then decreased, and the folding amplitude of at least part of the display component folding structure is continuously increased and then decreased.

7. The display module according to claim 6, wherein the cover sheet corrugated structure comprises at least one convex structure, the at least one convex structure protrudes in a direction close to the display element, and the thickness of the protective cover sheet at the position of the convex structure continuously increases first and then decreases in a direction in which the corner region extends from the junction of the first side curved region and the corner region to the junction of the second side curved region and the corner region; and/or the presence of a gas in the gas,

the cover plate fold structure comprises at least one invagination structure, the at least one invagination structure invaginates towards the direction far away from the display assembly, and the thickness of the protective cover plate at the position of the invagination structure continuously decreases gradually first and then increases gradually in the direction that the corner area extends from the joint of the first side curved surface area and the corner area to the joint of the second side curved surface area and the corner area.

8. The display module of claim 1, wherein the cover sheet corrugated structure comprises at least one cover sheet corrugated surface, and the display assembly corrugated structure comprises at least one display assembly corrugated surface that conforms to and engages the cover sheet corrugated surface.

9. The display module of claim 8, wherein the at least one cover fold curved surface comprises at least one cover fold convex curved surface, and the at least one cover fold convex curved surface protrudes in a direction approaching the display assembly;

at least one display component fold curved surface comprises at least one display component fold invagination curved surface, at least one display component fold invagination curved surface is to keeping away from the direction invagination of protection apron, at least one apron fold bulge curved surface and at least one display component fold invagination curved surface interlock one to one.

10. The display module of claim 9, wherein the thickness of the protective cover at the position of the convex curved surface of the cover wrinkle is greater than the thickness of the protective cover at the main display area, and the thickness of the display element at the position of the concave curved surface of the display element wrinkle is equal to the thickness of the display element at the main display area.

11. The display module of claim 8 or 9, wherein the at least one cover fold curvature comprises at least one cover fold invagination curvature that is invaginated in a direction away from the display assembly;

at least one display module fold curved surface includes at least one display module fold convex curved surface, display module fold convex curved surface is to being close to the direction of protection apron is outstanding, at least one display module fold convex curved surface with at least one the interlock of apron fold concave curved surface one to one.

12. The display module according to claim 11, wherein the thickness of the protective cover at the position of the cover fold sunken curved surface is smaller than the thickness of the protective cover at the main display area, and the thickness of the display element at the position of the display element fold protruded curved surface is equal to the thickness of the display element at the main display area.

13. The display module according to claim 1 or 2, wherein at least a portion of the cover sheet corrugation structure is located in a middle region where the corner region extends from a junction of the first side curved surface region and the corner region to a junction of the corner region and the second side curved surface region, and at least a portion of the display module corrugation structure is located in a middle region where the corner region extends from a junction of the first side curved surface region and the corner region to a junction of the corner region and the second side curved surface region.

14. The display module according to claim 1, wherein the protective cover plate comprises a corner attaching curved surface at a side of the corner region close to the display element, the cover plate wrinkle structure is disposed on the corner attaching curved surface and protrudes and/or sinks relative to the corner attaching curved surface, and a chamfer structure is disposed at a junction of the cover plate wrinkle structure and the corner attaching curved surface;

the display assembly comprises a display assembly corner part in the corner area, the display assembly corrugated structure is arranged on the display assembly corner part and protrudes and/or sinks relative to the display assembly corner part, and a chamfer structure is arranged at the joint of the display assembly corner part and the display assembly corrugated structure.

15. The display module of claim 1, wherein the surface of the protective cover plate away from the display element in the corner region comprises a smooth curved surface.

16. The display module of claim 1, wherein the display assembly comprises:

the first functional unit is attached to the protective cover plate and comprises a first functional unit folding structure meshed with the cover plate folding structure in the corner area; and

and the display panel is positioned on one side of the first functional unit, which is far away from the protective cover plate, and the corner area comprises a display panel fold structure meshed with the first functional unit fold structure.

17. The display module of claim 16, wherein the display assembly further comprises:

and the second functional unit is positioned on one side of the display panel, which is far away from the protective cover plate, and the corner area comprises a second functional unit fold structure meshed with the display panel fold structure.

18. A protective cover for a display module, said protective cover having at least a first cover side curved region, at least a second cover side curved region and at least a cover corner region, one said cover corner region being connected between adjacent one of said first cover side curved region and one second cover side curved region, said protective cover comprising:

and the cover plate fold structure is positioned on the binding surface of the corner area of the cover plate of the protective cover plate.

19. The utility model provides a bonding tool, its characterized in that, bonding tool has at least one first side and supports curved surface district, at least one second side and supports curved surface district and at least one and support curved surface district, one support curved surface district and connect between adjacent a first side and support curved surface district and a second side and support curved surface district, bonding tool includes:

20. A manufacturing method of a display module is characterized by comprising the following steps:

placing the protective cover plate on the display component to be attached, enabling the cover plate fold structure of the cover plate corner area and the jig fold structure of the support corner curved surface area to be correspondingly arranged, enabling one first cover plate side curved surface area to correspond to one first side support curved surface area and one second cover plate side curved surface area to correspond to one second side support curved surface area, pressing the protective cover plate and the display component to be attached under the supporting action of the attaching jig, enabling the display component to be attached to form a display component fold structure under the action of the jig fold structure and the cover plate fold structure which are matched with each other in the pressing process, and enabling the display component fold structure to be engaged with the jig fold structure and the cover plate fold structure;

and removing the attaching jig to obtain the display module.