CN117409679A

CN117409679A - Display module and display device

Info

Publication number: CN117409679A
Application number: CN202311436573.4A
Authority: CN
Inventors: 曾国栋; 黄小霞; 杨恩建; 吴易谦; 孙浩; 曾乙伦; 王永乐; 陈伟; 黄允晖; 杨虎飞; 姚孟亮
Original assignee: BOE Technology Group Co Ltd; Chongqing BOE Display Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chongqing BOE Display Technology Co Ltd
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2024-01-16

Abstract

The embodiment of the disclosure provides a display module and a display device, relates to the technical field of display, and is used for reducing the risk of a display module generating a stamping. The display module comprises a display panel, a connecting layer and a cover plate. The display side of the display panel has a display area and a non-display area. The apron sets up in display panel's display side, and the tie coat sets up between display panel and apron. The connecting layer is provided with a first sub-part and a second sub-part, the first sub-part is positioned in the display area in the orthographic projection to the reference plane, the second sub-part is positioned in the non-display area, and the reference plane is a plane where the surface of the cover plate far away from the display panel is positioned. Wherein the second sub-portion is provided with at least one first groove. The display module is used for displaying images.

Description

Display module and display device

Technical Field

The disclosure relates to the technical field of display, in particular to a display module and a display device.

Background

With the development of display technology, display devices (such as mobile phones, notebook computers or tablet computers) are increasingly used in the life of people. The display device comprises a display module, and the display effect of the display device is affected by the stamping easily generated by the structure of the display module in the preparation process of the display device.

Disclosure of Invention

An objective of the embodiments of the present disclosure is to provide a display module and a display device for reducing the risk of generating a stamp on the display module.

In order to achieve the above object, the embodiments of the present disclosure provide the following technical solutions:

in one aspect, a display module is provided. The display module comprises a display panel, a cover plate and a connecting layer. The display side of the display panel has a display area and a non-display area. The cover plate is arranged on the display side of the display panel. The connection layer is arranged between the display panel and the cover plate. The connecting layer is provided with a first sub-part and a second sub-part, the first sub-part is positioned in the display area in the orthographic projection to the reference plane, the second sub-part is positioned in the non-display area, and the reference plane is a plane where the surface of the cover plate far away from the display panel is positioned. The second sub-portion is provided with at least one first groove.

In the display module assembly, deformation of the connecting layer is released to the first groove, so that concentrated stress received by the connecting layer can be dispersed in the first groove, abrupt change of the shape of the connecting layer is prevented, the risk that the display module assembly generates stamping is reduced, and the display effect of the display module assembly is further prevented from being reduced. The area where the first groove is located corresponds to the non-display area, so that the display area presents the same bright and dark effect, the display effect of the display area is improved, and the display effect of the display module is improved.

In some embodiments, in a cross-section of the first groove along a direction perpendicular to the reference plane, the first groove includes a first sidewall and a second sidewall, the first sidewall and the second sidewall being curved or linear.

In some embodiments, the first sidewall has opposite first and second ends in a direction perpendicular to the reference plane; in the orthographic projection to the reference plane, the first end and the second end of the first side wall are not overlapped, and at least one of the first end and the second end is located on one side surface of the connecting layer. And/or, the second sidewall has opposite third and fourth ends in a direction perpendicular to the reference plane; the third end and the fourth end of the second side wall are not overlapped, and at least one of the third end and the fourth end is positioned on one side surface of the connecting layer.

In some embodiments, in an orthographic projection onto the reference plane, a distance from the first end to the second end of the first sidewall is greater than or equal to a thickness of the connection layer and less than a width of the second sub-portion. And/or, in the orthographic projection to the reference plane, the distance from the third end to the fourth end of the second side wall is greater than or equal to the thickness of the connection layer and less than the width of the second sub-portion.

In some embodiments, the first side wall and/or the second side wall comprises a first sub-wall and a second sub-wall connected to each other, the first sub-wall being rectilinear and the second sub-wall being circular arc-shaped in a cross section of the first groove along a direction perpendicular to the reference plane. The ratio of the dimension of the second sub-wall in the direction perpendicular to the reference plane to the thickness of the connection layer is less than or equal to 1/2.

In some embodiments, at least one second recess is provided in the first sub-wall in a direction perpendicular to the reference plane.

In some embodiments, the distance of the first recess to the display area in the orthographic projection onto the reference plane is greater than or equal to 0.1mm.

In some embodiments, the distance from the first groove to the peripheral boundary of the connection layer closest to the first groove is greater than or equal to 0.05mm.

In some embodiments, in orthographic projection onto the reference plane, the gaps between the plurality of first grooves are greater than or equal to the dimension of the first grooves in a set direction, the set direction being parallel to the reference plane.

In some embodiments, the plurality of first grooves are staggered.

In some embodiments, the display module further comprises a polarizer. The polaroid is arranged between the connecting layer and the display panel. The polarizer is provided with at least one third groove, and the third groove is positioned in the non-display area in the orthographic projection to the reference surface.

In some embodiments, the first groove and the third groove are symmetrical structures.

In some embodiments, the display module further includes a light shielding layer. The shading layer is arranged between the connecting layer and the cover plate and covers the first groove.

In another aspect, a display device is provided. The display device includes: the display module and the circuit board as in any one of the above embodiments. The circuit board is connected with the display module.

The display device has the same structure and beneficial technical effects as those of the display module provided in some embodiments, and will not be described in detail herein.

Drawings

In order to more clearly illustrate the technical solutions of the present disclosure, the drawings that need to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings may be obtained according to these drawings to those of ordinary skill in the art. Furthermore, the drawings in the following description may be regarded as schematic diagrams, not limiting the actual size of the products, the actual flow of the methods, the actual timing of the signals, etc. according to the embodiments of the present disclosure.

FIG. 1 is a diagram showing a structure of a display module in the related art;

FIG. 2 is a block diagram of an attachment jig in the related art;

fig. 3 is a block diagram of a display device according to an embodiment of the present disclosure;

FIG. 4 is a cross-sectional view taken along line A1-A2 in FIG. 3;

FIG. 5 is a block diagram of a connection layer provided by an embodiment of the present disclosure;

FIG. 6A is a cross-sectional view taken along line C1-C2 of FIG. 5;

FIG. 6B is a further cross-sectional view taken along line C1-C2 in FIG. 5;

FIG. 6C is a further cross-sectional view taken along line C1-C2 in FIG. 5;

FIG. 6D is a further cross-sectional view taken along line C1-C2 in FIG. 5;

FIG. 7A is a block diagram of a first sidewall provided by an embodiment of the present disclosure;

FIG. 7B is a block diagram of yet another first sidewall provided by an embodiment of the present disclosure;

FIG. 8A is a block diagram of a second sidewall provided by an embodiment of the present disclosure;

FIG. 8B is a block diagram of yet another second sidewall provided by an embodiment of the present disclosure;

FIG. 9 is a block diagram of yet another first sidewall provided by an embodiment of the present disclosure;

FIG. 10 is a block diagram of yet another first sidewall provided by an embodiment of the present disclosure;

FIG. 11 is an enlarged view at B of FIG. 5;

fig. 12 is a block diagram of a further display module according to the embodiment of the disclosure;

fig. 13 is a block diagram of another display module according to an embodiment of the present disclosure.

Detailed Description

The following description of the embodiments of the present disclosure will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by one of ordinary skill in the art based on the embodiments provided by the present disclosure are within the scope of the present disclosure.

Throughout the specification and claims, the term "comprising" is to be interpreted as an open, inclusive meaning, i.e. "comprising, but not limited to, unless the context requires otherwise. In the description of the present specification, the terms "one embodiment," "some embodiments," "example embodiments," "examples," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present disclosure, unless otherwise indicated, the meaning of "a plurality" is two or more.

In describing some embodiments, expressions of "coupled" and "connected" and their derivatives may be used. The term "coupled" is to be interpreted broadly, as referring to, for example, a fixed connection, a removable connection, or a combination thereof; can be directly connected or indirectly connected through an intermediate medium. The term "coupled" for example, indicates that two or more elements are in direct physical or electrical contact. The term "coupled" or "communicatively coupled (communicatively coupled)" may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other. The embodiments disclosed herein are not necessarily limited to the disclosure herein.

At least one of "A, B and C" has the same meaning as at least one of "A, B or C," both include the following combinations of A, B and C: a alone, B alone, C alone, a combination of a and B, a combination of a and C, a combination of B and C, and a combination of A, B and C.

"A and/or B" includes the following three combinations: only a, only B, and combinations of a and B.

The use of "adapted" or "configured to" herein is meant to be an open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

As used herein, "parallel", "perpendicular", "equal" includes the stated case as well as the case that approximates the stated case, the range of which is within an acceptable deviation range as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, where the acceptable deviation range for approximately parallel may be, for example, a deviation within 5 °; "vertical" includes absolute vertical and near vertical, where the acceptable deviation range for near vertical may also be deviations within 5 °, for example. "equal" includes absolute equal and approximately equal, where the difference between the two, which may be equal, for example, is less than or equal to 5% of either of them within an acceptable deviation of approximately equal.

It will be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present between the layer or element and the other layer or substrate.

Exemplary embodiments are described herein with reference to cross-sectional and/or plan views as idealized exemplary figures. In the drawings, the thickness of layers and the area of regions are exaggerated for clarity. Thus, variations from the shape of the drawings due to, for example, manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of example embodiments.

Fig. 1 is a block diagram of a display module according to the related art. Fig. 2 is a block diagram of an attaching jig in the related art.

Referring to fig. 1, a display module 100' of the related art includes a display panel 10', a polarizer 40', an optically transparent adhesive (Optically Clear Adhesive, OCA) layer 20', and a cover plate 30' sequentially stacked. Wherein the display panel 10' and the polarizer 40' constitute a display panel module 101'. An attaching jig, such as a 3D-Lami attaching device, is required for attaching the OCA layer 20' to the display panel module 101' when preparing the display module 100'. Referring to fig. 2, the attaching jig includes an attaching platform P1 and a roller P2, when the OCA layer 20' is attached, the OCA layer 20' is placed on the attaching platform P1, so that the OCA layer 20' corresponds to an attaching area of the display panel module 101', the OCA layer 20' is rolled and pressed from a side of the OCA layer 20' far away from the display panel module 101' through the roller P2, the OCA layer 20' is attached to the display panel module 101', and then a cover plate 30' is bonded on a side of the OCA layer 20' far away from the display panel module 101', so as to form the display module 100'. In the attaching process, the roller P2 is lifted up by the cylinder to dent the OCA layer 20', that is, the OCA layer 20' attached to the display panel 10' is subjected to concentrated stress and deformed. Because the OCA layer 20 'has no gap for dispersing concentrated stress, the deformation of the OCA layer 20' is released, and the shape of the OCA layer 20 'changes rapidly, so that the display module 100' generates a horizontal bar stamp, and particularly for a flexible display panel, the force of the external concentrated area is easier to stamp the flexible display panel, and the display effect is affected.

The deformation of the OCA layer 20' is not released, resulting in arching and sagging of various portions of the OCA layer 20', particularly the display area of the display panel 10' (as shown in fig. 1). The OCA layer 20 'is deformed such that the polarizer 40' bonded to the OCA layer 20 'is arched and depressed accordingly, reducing the polarization performance of the polarizer 40'. The area where the OCA layer 20' is arched and depressed is an uneven area, and the remaining area is a flat area. When the outside natural light irradiates the flat area, the light is normally reflected at the OCA layer 20', and the emitted light is parallel light. When natural light irradiates the rugged region, the light emitted from the arched region of the OCA layer 20 'is more concentrated, so that the brightness of the corresponding region of the display module 100' is improved; the light emitted from the recessed area of the OCA layer 20 'is more dispersed, resulting in a decrease in brightness of the corresponding area of the display module 100'. In this way, the display module 100 'has different brightness effects, and the cross bar stamping is more obvious, thereby reducing the display effect of the display module 100'.

In order to reduce the risk of the display module generating the stamping, some embodiments of the present disclosure provide a display device. The display device has an image (including a still image or a moving image, wherein the moving image may be a video) display function. For example, the display device may be any one of a display, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a cellular phone, a personal digital assistant (Personal Digital Assistant, PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a large-area wall, a home appliance, an information inquiry apparatus (such as a business inquiry apparatus for an e-government, a bank, a hospital, an electric power department, or the like), a monitor, an electronic picture screen, a wearing-type screen, a Virtual Reality (VR) display apparatus, an augmented Reality (Augmented Reality, AR) display apparatus, an in-vehicle display, and the like, but is not limited thereto.

For convenience of the following description, an XYZ coordinate system is established. The first direction X and the second direction Y are parallel to the display surface of the display module, and are crossed. For example, the first direction X and the second direction Y are perpendicular to each other. The first direction X is, for example, a horizontal direction of the display surface, and the second direction Y is, for example, a vertical direction of the display surface. The third direction Z is the thickness direction of the display module, and is perpendicular to the XY plane.

Fig. 3 is a block diagram of a display device according to an embodiment of the present disclosure. Fig. 4 is a cross-sectional view taken along line A1-A2 in fig. 3.

Referring to fig. 3 and 4, the display device 1000 includes a display module 100 and a circuit board 200. The display module 100 is connected to the circuit board 200. The circuit board 200 may be a rigid printed circuit board (hereinafter, abbreviated as Printed Circuit Board, hereinafter, abbreviated as PCB), a flexible circuit board (hereinafter, abbreviated as Flexible Printed Circuit board, hereinafter, abbreviated as FPC), or a flexible-rigid board. The circuit board 200 is coupled to the display module 100 and configured to transmit electrical signals to the display module 100.

The display device 1000 further includes a driving circuit (Integrated Circuit, abbreviated as IC) 300 for providing a control signal to the display module 100, and the driving circuit 300 is connected to the circuit board 200 to transmit the control signal provided by the driving circuit 300 to the display module 100.

The display module 100 includes a display panel 10, a connection layer 20, and a cover plate 30. Along the third direction Z, the display panel 10, the connection layer 20, and the cover plate 30 are sequentially disposed.

The display Panel (Panel) 10 is for displaying an image. The display side of the display panel 10 includes a display area AA and a non-display area SA, wherein the display side of the display panel 10 is the side of the display panel 10 for viewing by a user. The display area AA is an area on the display panel 10 for displaying a picture, and the non-display area SA is an area on the display side of the display panel 10 except the display area AA. The non-display area SA may be located on at least one side (e.g., one side, such as multiple sides) of the display area AA. For example, as shown in fig. 3, the non-display area SA may be disposed around the display area AA for one week.

Depending on the display principle, the display panel 10 may be any one of an organic light emitting diode (hereinafter referred to as Organic Light emitting Diode, abbreviated as OLED) display panel, a quantum dot light emitting diode (hereinafter referred to as Quantum Dot Light Emitting Diodes, abbreviated as QLED) display panel, a Micro light emitting diode (hereinafter referred to as Mini LED or Micro LED) display panel, and a liquid crystal display (hereinafter referred to as Liquid Crystal Display, abbreviated as LCD) panel.

The display panel 10 may be a rigid display panel or a flexible display panel according to the nature of whether the display panel 10 can be bent. Illustratively, referring to fig. 4, the display panel 10 is a flexible display panel, and the display panel 10 includes a display portion 11, a bending portion 12, and a binding portion 13 connected in sequence, the bending portion 12 being bent such that the binding portion 13 is located at the rear surface of the display panel 10. The back surface of the display panel 10 is opposite to the display side of the display panel 10. In the orthographic projection onto the XY plane, the display area AA is located in the display section 11.

The flexible display panel further includes a plurality of conductive PADs (also referred to as PADs, PADs) provided at the bonding portion 13, which may be electrically connected to the circuit board 200, for example, both of them are connected by conductive paste.

In some embodiments, the bending portion 12 of the display panel 10 is provided with a protection layer 14 for protecting the bending portion 12. The protective layer 14 is located at a side of the bending portion 12 away from the display portion 11 and covers the bending portion 12. The material of the protective layer 14 may be an adhesive material or a metallic material.

The cover plate 30 is disposed on the display side of the display panel 10 for protecting the display panel 10. The cover plate 30 covers the display panel 10, that is, the cover plate 30 covers the display area AA and the non-display area SA of the display side of the display panel 10. Illustratively, referring to fig. 4, the boundary of the cover plate 30 is farther from the display portion 11 than the boundary of the bent portion 12 furthest from the display portion 11. The cover plate 30 extends on the XY plane such that the upper and lower surfaces of the cover plate 30 are parallel to the XY plane. The material of the cover plate 30 may be a transparent material such as acryl or glass, which is not limited in the embodiment of the present disclosure.

The connection layer 20 is disposed between the display panel 10 and the cover plate 30, and is used to connect the display panel 10 and the cover plate 30. The material of the connection layer 20 may include at least one of an optically transparent adhesive (hereinafter, abbreviated as OCA, all english, optically Clear Adhesive), a liquid optically transparent adhesive (hereinafter, abbreviated as LOCA, all english, liquid Optical Clear Adhesive), or an ultraviolet curable adhesive, but not limited thereto, and may be other adhesive materials capable of achieving connection. For example, the connection layer 20 is an optically transparent hot melt adhesive film (English full name is Thermal-melt Optical Clear Adhesive, TOCA for short).

Fig. 5 is a block diagram of a connection layer provided in an embodiment of the present disclosure.

A part of the area of the connection layer 20 corresponds to the display area AA, and another part of the area corresponds to the non-display area SA. Specifically, the connection layer 20 has a first sub-portion 21 and a second sub-portion 23, the first sub-portion 21 being located in the display area AA and the second sub-portion 23 being located in the non-display area SA in the orthographic projection onto the XY plane. The second sub-portion 23 may be located on at least one side (e.g., one side, as well as multiple sides) of the first sub-portion 21.

The connection layer 20 may further have a transition sub-portion 22, and the transition sub-portion 22 is located on the connection layer 20 at a region that transitions from the display area AA and the non-display area SA for connecting the first sub-portion 21 and the second sub-portion 23. Illustratively, the transition sub-section 22 is entirely located in the non-display area AA; also illustratively, the transition sub-section 22 is located partially in the display area AA and partially in the non-display area SA; also illustratively, the transition sub-section 22 is entirely located in the display area AA. The transition sub-portion 22 is located between the first sub-portion 21 and the second sub-portion 23, so that even if the attaching distance is deviated during the attaching of the connection layer 20, the second sub-portion 23 is always located in the non-display area SA. The boundary between the transition sub-portion 22 and the first sub-portion 21 is a first boundary L. The transition sub-portion 22 may be located on at least one side (e.g., one side, as well as multiple sides) of the first sub-portion 21. For example, the second sub-portion 23 may be disposed around the first sub-portion 21 one turn, at which time the transition sub-portion 22 is disposed around the first sub-portion 21 one turn, and the first boundary L around the transition sub-portion 22 one turn. As another example, referring to fig. 5, the second sub-portion 23 is located at one side, e.g., the lower side, of the first sub-portion 21. At this time, the transition sub-portion 22 is located at one side of the first sub-portion 21, and the first boundary L divides the connection layer 20 into upper and lower parts, which is located at one side of the transition sub-portion 22 near the second sub-portion 23.

The related art starts with the attaching jig to reduce the risk of the display module 100 generating the stamp. For example, reducing the roller diameter reduces the pressure of the roller against the tie layer 20 to reduce the concentrated stress of the roller against the tie layer 20. However, reducing the diameter of the roller may cause the connection layer 20 to be not tightly pressed on the display panel module, so that bubbles are generated in the connection layer 20, and the defective rate of the product is improved. For another example, the bonding start position of the roller to the connection layer 20 is changed such that the bonding start position is far away from the display area SA. However, in this way, when the roller lifts the connection layer 20, the connection layer 20 may adhere to the protection layer 14 at the attachment start position. One side of the display panel module is partially connected to the connection layer 20 and a portion is connected to the protection layer 14. In this way, in the subsequent bending process, a part of the display panel 10 is stretched by the connection layer 20, a part of the display panel is stretched by the protection layer 14, and the tensile forces applied by the two parts are different, so that the display panel 10 generates a Crack (Crack) in the subsequent bending process.

To address the above, embodiments of the present disclosure leave a void in the connection layer 20. Specifically, the connection layer 20 is provided with at least one (e.g., one, and as a further example, a plurality of) first grooves G. Although a limited number of first grooves G is shown in fig. 5, the number of first grooves G is not limited. In some embodiments, the first grooves G may be arranged in an array, for example, in N rows and M columns; wherein N is an integer greater than 0 and M is an integer greater than 0. For example, N.gtoreq.2, M.gtoreq.2. In other embodiments, the plurality of first grooves G may be arranged in any other arrangement, such as in a circular array. In the orthographic projection onto the reference surface, the shape of the first groove G may be a circle, an ellipse, or a polygon, or may be other shapes, which is not limited in the embodiment of the present disclosure. The reference plane is a plane on which a surface of the cover plate 30 away from the display panel 10 (i.e., an upper surface of the cover plate 30 in fig. 4) is located, and all reference planes mentioned below are based on the explanation herein. The third direction Z is perpendicular to the reference plane.

Fig. 6A is a cross-sectional view taken along line C1-C2 in fig. 5. Fig. 6B is a further cross-sectional view taken along line C1-C2 in fig. 5.

In a cross section of the first groove G in a direction perpendicular to the reference plane, the first groove G includes a first sidewall 201 and a second sidewall 202, the first sidewall 201 having opposite first and second ends, the second sidewall having opposite third and fourth ends. The first sidewall 201 and the second sidewall 202 extend from one side surface of the connection layer 20 into the connection layer 20, and the first sidewall 201 and the second sidewall 202 are disposed opposite to each other. The first sidewall 201 and the second sidewall 202 may have a symmetrical structure or an asymmetrical structure, and the embodiment of the present disclosure is not limited thereto.

Illustratively, referring to fig. 6A, the first recess G may be a via hole extending through the connection layer 20. The first sidewall 201 extends from a side surface of the connection layer 20 near the cap plate 30 (hereinafter, referred to as an upper surface of the connection layer 20) to a side surface of the connection layer 20 far from the cap plate 30 (hereinafter, referred to as a lower surface of the connection layer 20), and at this time, a first end and a second end of the first sidewall 201 are located on the upper and lower surfaces of the connection layer 20, respectively. The second sidewall 202 extends from the upper surface of the connection layer 20 to the lower surface of the connection layer 20, and at this time, the third end and the fourth end of the second sidewall 202 are located on the upper and lower surfaces of the connection layer 20, respectively.

Also for example, referring to fig. 6B, the first groove G may be a blind hole, and an opening of the first groove G is provided on the surface of the connection layer 20. For example, the opening of the first groove G is located on the upper surface of the connection layer 20, and the opening of the first groove G faces the cover plate 30. The first sidewall 201 and the second sidewall 202 extend from the upper surface of the connection layer 20 into the connection layer 20 without penetrating the connection layer 20. At this time, one of the first end and the second end of the first sidewall 201 is located on the upper surface of the connection layer 20, and the other is located within the connection layer 20. One of the third and fourth ends of the second sidewall 202 is located on the upper surface of the connection layer 20, and the other is located within the connection layer 20. As another example, the opening of the first groove G is located at the lower surface of the connection layer 20, and the opening of the first groove G faces the display panel 10. The first and second sidewalls 201 and 202 extend from the lower surface of the connection layer 20 into the connection layer 20 without penetrating the connection layer 20. At this time, one of the first end and the second end of the first sidewall 201 is located at the lower surface of the connection layer 20, and the other is located within the connection layer 20. One of the third and fourth ends of the second sidewall 202 is located on the lower surface of the connection layer 20, and the other is located within the connection layer 20.

The connecting layer 20 is deformed by the pressure of the roller during the attaching process. The first grooves G in the connection layer 20 may disperse concentrated stress, so that the deformation of the connection layer 20 is released to the first grooves G to prevent the abrupt change of the shape of the connection layer 20, thereby reducing the risk of the display module 100 generating a stamp and avoiding reducing the display effect of the display module 100.

The first groove G is located in the second sub-portion 23 of the connection layer 20. That is, the area where the first groove G is located corresponds to the non-display area SA. In this way, the first grooves G cause the uneven area of the connection layer 20 to concentrate on the second sub-portion 23, and the first sub-portion 21 is a flat area. Also, since the second sub-portion 23 corresponds to the non-display area SA and the first sub-portion 21 corresponds to the display area AA, the rugged region corresponds to the non-display area SA and the flat region corresponds to the display area AA. Even if the connection layer 20 generates a stamp, the stamp may appear in the non-display area SA, and the stamp of the non-display area SA may not reduce the display effect of the display module 100. The light irradiated to the flat area of the connection layer 20 can be normally reflected, so that the bright and dark effects of the display area AA are the same, and the display effect of the display area AA is improved, thereby improving the display effect of the display module 100.

Fig. 6C is a further cross-sectional view taken along line C1-C2 in fig. 5. Fig. 6D is a further cross-sectional view taken along line C1-C2 in fig. 5.

In some embodiments, in a cross section of the first groove G along a direction perpendicular to the reference plane, the first sidewall 201 and the second sidewall 202 are curved or linear. Illustratively, with continued reference to fig. 6A, the first and second sidewalls 201, 202 are curvilinear. When the sidewall is curved, the thickness of the connection layer 20 is changed along the third direction Z, so that the different thicknesses disperse stresses of different magnitudes, and the deformation of the connection layer 20 can be released in the gap. For example, the first side wall 201 and the second side wall 201 are arc-shaped, the right angle transition of the connecting layer 20 is changed into arc transition, when the cylinder jack-up roller presses the connecting layer 20, the connecting layer 20 has a dislocation space along the second direction Y, so as to release the concentrated stress caused by the roller jack-up of the attaching jig, and improve the stamping phenomenon. As another example, with continued reference to fig. 6B, the first sidewall 201 is linear in one portion and curved in another portion, and the second sidewall 202 is linear in one portion and curved in another portion. Also exemplary, either of the first sidewall 201 and the second sidewall 202 is rectilinear and the other is curvilinear. For example, referring to fig. 6C, the first sidewall 201 is linear, the first sidewall 201 may be perpendicular to the reference plane, and the second sidewall 202 is curved. As another example, the first sidewall 201 is curved, the second sidewall 202 is linear, and the second sidewall 202 may be perpendicular to the reference plane. Also illustratively, referring to fig. 6D, the first sidewall 201 and the second sidewall 202 are each rectilinear. The first sidewall 201 and the second sidewall 202 are both perpendicular to the reference plane. The linear shape is easy to form, so that the manufacturing steps for preparing the first groove G can be simplified, and the manufacturing efficiency of the product can be improved.

Fig. 7A is a block diagram of a first sidewall provided by an embodiment of the present disclosure. Fig. 7B is a block diagram of yet another first sidewall provided by an embodiment of the present disclosure.

In some embodiments, referring to fig. 7A, in an orthographic projection onto a reference plane, the first sidewall 201 is curved, the thickness of the connection layer 20 varies along the first sidewall 201, and the first end 2011 of the first sidewall 201 overlaps the second end 2012.

In some embodiments, referring to fig. 7B, in an orthographic projection to a reference plane, the first end 2011 and the second end 2012 of the first sidewall 201 do not overlap. That is, in the orthographic projection to the reference plane, a distance (hereinafter referred to as a first distance) d1 between the first end 2011 and the second end 2012 is greater than zero. Thus, when the roller of the attaching jig presses the connecting layer 20, the first sidewall 201 of the first groove G has a dislocation space in the first direction X or the second direction Y. In the orthographic projection to the reference plane, the larger the distance between the first end 2011 and the second end 2012, the more dislocation space is provided for the attachment jig to jack up the connecting layer 20, so that the concentrated stress caused by the jacking of the attachment jig is released, the stress value of the concentrated stress is reduced, the abrupt change of the shape of the connecting layer 20 is prevented, the risk of generating stamping of the display module 100 is reduced, and the display effect of the display module 100 is further prevented from being reduced.

In some embodiments, referring to fig. 4, 5, and 7B, the first distance d1 is greater than or equal to the thickness a of the connection layer and less than the width w of the second sub-portion. The width w of the second sub-portion is the distance from the peripheral boundary of one side of the connection layer 20 to the boundary of the second sub-portion 23 parallel to the peripheral boundary. The connection layer 20 has a dislocation space in the XY plane when the first distance d1 is not zero. The first distance d1 is greater than or equal to the thickness a of the connection layer 20, so that the opening area of the first groove G can be increased, and as a result, the dislocation space of the connection layer 20 on the XY plane is larger, and the stress that the connection layer 20 can bear on the XY plane is increased, so that the connection layer 20 is easier to deform on the XY plane, and as a result, the deformation of the connection layer 20 occurs in the first groove G, and the risk of stamping the connection layer 20 is reduced.

The first distance d1 is smaller than the width w of the second sub-portion, in particular, the first distance d1 is smaller than or equal to the difference between the width w of the second sub-portion and the attachment tolerance (e.g., 0.1 mm). When the second sidewall 202 is perpendicular to the reference plane, the first distance d1 is the dimension of the first groove G perpendicular to the reference plane, and the first distance d1 being smaller than the width w of the second sub-portion can prevent the first distance d1 from being too large and traversing the second sub-portion 23, so that the first groove G is exposed at the side surface of the connection layer 20, resulting in moisture entering the display module 100, and reducing the service life of the display module 100.

Fig. 8A is a block diagram of a second sidewall provided by an embodiment of the present disclosure. Fig. 8B is a block diagram of yet another second sidewall provided by an embodiment of the present disclosure.

In some embodiments, referring to fig. 8A, the second sidewall 202 is curved, and the thickness of the connection layer 20 varies along the second sidewall 202, with the third end 2021 of the second sidewall 202 overlapping the fourth end 2022.

In some embodiments, referring to fig. 8B, the third end 2021 of the second sidewall 202 does not overlap the fourth end 2022 in an orthographic projection to the reference plane. That is, in the orthographic projection to the reference plane, a distance (hereinafter referred to as a second distance) d2 between the third end 2021 and the fourth end 2022 is greater than zero. When the roller of the attaching jig presses the connecting layer 20, the second sidewall 202 of the first groove G has a dislocation space in the first direction X or the second direction Y. The larger the second distance d2 is, the more dislocation space is provided for the attachment jig to jack up the connecting layer 20, so that the concentrated stress caused by the jacking of the attachment jig is released, the stress value of the concentrated stress is reduced, the abrupt change of the shape of the connecting layer 20 is prevented, the risk of generating stamping of the display module 100 is reduced, and the display effect of the display module 100 is prevented from being reduced.

In some implementations, the first end 2011 of the first sidewall 201 overlaps the second end 2012, and the third end 2021 of the second sidewall 202 does not overlap the fourth end 2022. In still other implementations, the first end 2011 and the second end 2012 of the first sidewall 201 do not overlap, and the third end 2021 and the fourth end 2022 of the second sidewall 202 overlap.

In some embodiments, the second distance d2 is greater than or equal to the thickness of the connection layer 20 and less than the width w of the second sub-portion. The connection layer 20 has a dislocation space in the XY plane when the second distance d2 is not zero. The second distance d2 is greater than or equal to the thickness a of the connection layer 20, so that the opening area of the first groove G can be increased, and as a result, the dislocation space of the connection layer 20 in the XY plane is larger, and the stress that the connection layer 20 can bear in the XY plane is increased, so that the connection layer 20 is easier to deform in the XY plane, and as a result, the deformation of the connection layer 20 occurs in the first groove G, and the risk of stamping the connection layer 20 is reduced.

The second distance is smaller than the width w of the second sub-portion, in particular, the second distance is smaller than or equal to the difference between the width w of the second sub-portion and the attachment tolerance (e.g., 0.1 mm). When the first sidewall 201 is perpendicular to the reference plane, the second distance d2 is the dimension of the first groove G perpendicular to the reference plane, and the second distance smaller than the width w of the second sub-portion can prevent the second distance from being too large and traversing the second sub-portion 23, so that the first groove G is exposed on the side surface of the connection layer 20, resulting in water vapor entering the display module 100, and reducing the service life of the display module 100.

Fig. 9 is a block diagram of yet another first sidewall provided by an embodiment of the present disclosure.

In some embodiments, in a cross-section of the first groove G along a direction perpendicular to the reference plane, the first side wall 201 and/or the second side wall includes a first sub-wall 51 and a second sub-wall 52, the first sub-wall 51 being straight, and the second sub-wall 52 being arc-shaped. In the third direction Z, the first sub-wall 51 and the second sub-wall 52 of the first side wall 201 are connected to each other, and the first sub-wall 51 and the second sub-wall 52 of the second side wall 202 are connected to each other. Specifically, referring to fig. 9, the first sidewall 201 and the second sidewall (not shown in the drawings) each include a first sub-wall 51 and a second sub-wall 52. The first sub-wall 51 is linear, the first sub-wall 51 is perpendicular to the reference plane, extends inward from one side surface of the connection layer 20, and the second sub-wall 52 is arc-shaped. More specifically, the first side wall 201 includes the aforementioned first sub-wall 51 and second sub-wall 52, and the second side wall is linear or circular arc-shaped. More specifically, the second side wall includes the aforementioned first sub-wall 51 and second sub-wall 52, and the first side wall 201 is linear or circular arc-shaped. The combination of the straight line shape and the circular arc shape can reduce stress concentration, thereby improving the stamping phenomenon.

The ratio of the dimension b of the second sub-wall 52 along the third direction Z to the thickness a of the connection layer is less than or equal to 1/2, which is beneficial to the light and thin display device. For example, the ratio of the thickness b of the second sub-wall 52 to the thickness a of the connection layer is equal to 1/2, and at this time, the dimension of the first sub-wall 51 in the third direction Z is the same as the dimension of the second sub-wall 52 in the third direction Z. As another example, the ratio of the dimension b of the second sub-wall 52 along the third direction Z to the thickness a of the connection layer is less than 1/2, and at this time, the dimension b of the first sub-wall 51 along the third direction Z is greater than the dimension of the second sub-wall 52 along the third direction Z, for example, when the thickness a of the connection layer 20 is 0.15mm, the dimension b of the second sub-wall 52 along the third direction Z is less than 0.075mm.

Fig. 10 is a block diagram of yet another first sidewall provided by an embodiment of the present disclosure.

In some embodiments, referring to fig. 10, at least one (e.g., one, and as a further example, a plurality of) second grooves 511 are provided on the first sub-wall 51 along the third direction Z. The arrangement direction of the plurality of second grooves 511 is parallel to the thickness direction of the connection layer 20. The first sub-wall 51 is closer to the surface of the connection layer 20 than the second sub-wall 52. The second groove 511 allows the connection layer 20 to collapse on the first sub-wall 51, and when the connection layer 20 is attached to the roller, the second groove 511 can be used to counteract the stress of the roller on the connection layer 20 on the linear sub-wall, so as to facilitate the stress of the connection layer 20 contacting the roller to be dispersed, thereby reducing the risk of stamping the display module 100.

Fig. 11 is an enlarged view at B of fig. 5.

In some embodiments, referring to fig. 10, a distance f from the first groove G to the display area AA (hereinafter referred to as a third distance) is at least an attachment tolerance of the connection layer 20. Specifically, the third distance f is greater than or equal to the attachment tolerance of the connection layer 20. For example, the third distance f is greater than or equal to 0.1mm, such as 0.1mm,0.15mm, etc. In the attaching process, the connecting layer 20 may have attaching deviation, if the distance from the first groove G to the display area AA is smaller than the attaching tolerance of the connecting layer 20, the first groove G may be located in the display area AA, so that the area of the connecting layer 20 located in the display area AA becomes uneven, which affects light reflection, and causes the display module 100 to generate a stamp, thereby affecting the display effect of the display module 100. In some examples, the distance of the first groove G from the first boundary L is greater than or equal to an attachment tolerance of the tie layer 20, such as greater than or equal to 0.1mm, such as 0.1mm,0.15mm, etc. Under the condition that the transition sub-portion 22 is located in the display area AA during the attaching process of the connection layer 20, the first groove G may be located in the display area AA, so that the area of the connection layer 20 located in the display area AA becomes uneven, which affects the light reflection, and causes the display module 100 to generate a stamping, thereby affecting the display effect of the display module 100. In the case that the distance from the first groove G to the first boundary L is equal to the attachment tolerance, even if the deviation occurs when the connection layer 20 is attached, the boundary of the first groove G is located on the first boundary L, so that the first groove G is always located in the non-display area SA; under the circumstance that the third distance f is smaller than the attaching tolerance, even if the deviation occurs when the connecting layer 20 is attached, the boundary of the first groove G is located in the second sub-portion 23, so that the first groove G is always located in the non-display area SA, the risk of stamping is reduced, and the display effect of the display module 100 is improved.

In an environmental reliability experiment, it is found that under a high temperature condition, the material of the connection layer 20 is thermally expanded, so that the size of the first groove G is increased, and the first groove G is located at the edge of the connection layer 20, so that water vapor enters the first groove G from the edge, and is not easy to drain out of the connection layer 20, thereby affecting the display effect of the display module 100.

To solve the above-described problem, in some embodiments, with continued reference to fig. 10, a distance m from the first groove G to the connecting layer 20 nearest to the peripheral boundary of the first groove G (hereinafter, fourth distance) is greater than or equal to 0.05mm. For example, for the first groove Ga, the peripheral boundary of the connection layer 20 closest to the first groove Ga is the right side boundary of the connection layer 20, and at this time, the fourth distance m1 of the first groove Ga is the distance from the first groove Ga to the right side peripheral boundary of the connection layer 20. The fourth distance m1 is greater than or equal to 0.05mm. As another example, for the first groove Gb, the peripheral boundary of the connection layer 20 closest to the first groove Gb is the lower side boundary of the connection layer 20, and at this time, the fourth distance m2 of the first groove Gb is the distance from the first groove Gb to the lower side peripheral boundary of the connection layer 20. The fourth distance m2 is greater than or equal to 0.05mm. As another example, for the first groove Gc, the peripheral boundary of the connection layer 20 closest to the first groove Gc is the right boundary of the connection layer 20 and the lower boundary of the connection layer 20, and at this time, the distances of the first groove Gc to the right boundary of the connection layer 20 and the first groove Gc to the lower boundary of the connection layer 20 satisfy 0.05mm or more at the same time.

Specifically, an initial connection layer provided with a plurality of connection layers 20 may be attached to a display panel module, then a connection layer 20 with a specific contour is formed by punching with a cutter with the same specification, or a connection layer 20 with a specific contour is formed by cutting, and then the connection layer 20 is attached to the display panel module through an optical alignment device and a manual jig; the attaching mode can be performed by rolling through rollers.

Illustratively, the first groove G may be formed directly on the cut connection layer 20 during the preparation of the connection layer 20, and at this time, a distance from the first groove G to a peripheral boundary of the connection layer 20 closest to the first groove G is greater than or equal to 0.05mm, for example, 0.05mm,0.1mm,0.15mm, etc., which distance prevents the first groove G from being directly exposed to the environment even if thermal expansion occurs after the connection layer 20 is attached to the display panel 10, so that moisture cannot enter the first groove G, thereby preventing the generation of moisture between the connection layer 20 and the display panel 10.

Also illustratively, during the preparation of the tie layer 20, an initial tie layer comprising a plurality of tie layers 20 is formed simultaneously with a plurality of first grooves G formed thereon. The initial connection layer is cut to form a plurality of connection layers 20 having first grooves G. At this time, when the edge of the connection layer 20 is a cut edge, the distance from the first groove G to the peripheral boundary of the connection layer 20 closest to the first groove G should be greater than or equal to 0.15mm, for example, 0.15mm,0.2mm, etc., in consideration of thermal expansion and profile cutting tolerance of the connection layer 20, specifically, the distance from the first groove G to the peripheral boundary of the connection layer 20 closest to the first groove G. Thus, even if there is a deviation in the process of cutting the connection layer 20, the first groove G is not directly exposed to the environment after the connection layer 20 is assembled into the display module, so that moisture cannot enter the first groove G, thereby preventing the generation of moisture between the connection layer 20 and the display panel 10.

In some embodiments, continuing to refer to fig. 11, the gaps n between the plurality of first grooves G are greater than the dimension of the first grooves G along a set direction, the set direction being parallel to the reference plane. Specifically, the gaps between the plurality of first grooves G are greater than or equal to the sum of the opening size of the first grooves G and the expansion coefficient (e.g., 0.05 mm) of the joining layer material on both sides. At this time, the plurality of first grooves G of the connection layer 20 are not connected together in a high temperature environment, and each first groove G is smaller, so that concentrated stress applied to the connection layer 20 can be dispersed in the plurality of first grooves G, thereby preventing abrupt shape change of the connection layer 20, improving the risk of stamping of the display module 100 better, and ensuring that the reliability specification of the display module 100 is not reduced.

In some embodiments, with continued reference to fig. 11, the plurality of first grooves G are staggered. Under the condition that the number of the first grooves G is certain, the area occupied by the first grooves G can be reduced by staggered arrangement, and then the area of the second sub-portion 23 is reduced, so that the proportion occupied by the non-display area SA on the display side is reduced, the screen occupation ratio of the display panel 10 is further improved, and the display effect of the display module 100 is improved. Under the condition that the area of the second sub-portion 23 is fixed, the staggered arrangement of the first grooves G can increase the number of the first grooves G, so as to disperse more concentrated stress and reduce the risk of generating stamping of the display module 100.

Fig. 12 is a block diagram of another display module according to an embodiment of the present disclosure. Fig. 13 is a block diagram of another display module according to an embodiment of the present disclosure.

In some embodiments, referring to fig. 4 and 12, the display module 100 further includes a Polarizer (POL) 40. The polarizer 40 is disposed between the connection layer 20 and the display side of the display panel 10, and has polarization properties. The polarizer 40 is configured to change unpolarized light emitted from the display panel 10 passing through the polarizer 40 into polarized light, and to improve uniformity of light emitted from the display panel 10, thereby weakening rainbow lines appearing in a display image of the display panel 10 to improve a display effect of the display module 100. The polarizer 40 may be a transmissive polarizer, a reflective polarizer, a transflective polarizer, a compensation type polarizer, and the like, which is not limited in the embodiments of the present disclosure.

In some embodiments, with continued reference to fig. 12 and 13, polarizer 40 is provided with at least one (e.g., one, and as a further example, a plurality of) third grooves K. The side wall of the third groove K may be arc-shaped, may be straight-shaped, or may be a combination of straight-shaped and arc-shaped, and of course, the third groove K may be other shapes, which is not limited in the embodiment of the present disclosure. Illustratively, the third groove K may be a through hole penetrating the polarizer 40. Also, for example, the third groove K may be a blind hole, and an opening of the third groove K is formed on the surface of the polarizer 40. For example, the opening of the third groove K is located on the upper surface of the polarizer 40 (the surface of the polarizer 40 on the side close to the cover plate 30). For another example, the opening of the third groove K is located on the lower surface of the polarizer 40 (the surface of the polarizer 40 on the side away from the cover plate 30). The third groove K can disperse concentrated stress, so that when the polarizer 40 deforms due to the deformation of the connection layer 20, the stress received by the polarizer 40 is released to the third groove K, so that the shape of the polarizer 40 is prevented from being changed rapidly, the polarizer 40 is prevented from driving the connection layer 20 to be changed, the risk of generating stamping of the display module 100 is reduced, and the display effect of the display module 100 is prevented from being reduced.

In the orthographic projection onto the reference plane, the third groove K is located in the non-display area SA. Thus, the third grooves K cause the rugged region of the polarizer 40 to concentrate in the non-display area SA, which is still a flat region. Even if the polarizer 40 is deformed to cause the connection layer 20 to generate a stamp, the stamp may be present in the non-display area SA, and the stamp of the non-display area SA may not reduce the display effect of the display module 100.

In an orthographic projection onto the reference plane, the third groove K coincides with the opening of the first groove G. Specifically, with continued reference to fig. 11 and 12, the first groove G is opposite to the opening of the third groove K. Illustratively, the first recess G is a blind hole, with the opening of the first recess G facing the lower surface of the connection layer 20. The third groove K opens toward the upper surface of the polarizer 40. The first groove G and the third groove K form a closed concave hole design, which increases the void volume in the display module 100, provides a larger dislocation space for the connection layer 20, is beneficial to releasing concentrated stress, and can bear the speed and pressure of the larger attaching jig for jacking up the connection layer 20, so as to improve the risk of generating stamping of the display module 100. Also, the overlapping of the openings may reduce the area of the polarizer 40 corresponding to the non-display SA, thereby reducing the width of the polarizer 40. Also illustratively, the first recess G is implemented through the connection layer 20 with the opening of the first recess G facing the upper and lower surfaces of the connection layer 20 and the opening of the third recess K facing the opening of the first recess G. At this time, the third groove K is a blind hole, preventing the groove from directly penetrating the connection layer 20 and the polarizer 40, and the light directly irradiates the display panel 10, so as to accelerate the aging of the display panel 10.

In the orthographic projection to the reference plane, the third grooves K are staggered with the openings of the first grooves G. Illustratively, the opening of the third groove K partially overlaps the opening of the first groove G. Also illustratively, the opening of the third recess K does not overlap the opening of the first recess G. At this time, when the first groove G penetrates the connection layer 20, the portion of the third groove K overlapping with the opening of the first groove G is a blind hole, and the portion not overlapping may penetrate the polarizer 40.

In some embodiments, with continued reference to fig. 12, the first groove G and the third groove K are symmetrical structures. The symmetry axis is the plane in which the interface of polarizer 40 and tie layer 20 lies. At this time, the first groove G and the third groove K are blind holes. In the embodiment of the disclosure, the first groove G and the third groove K can be prepared simultaneously, so that the preparation steps of the display module 100 are simplified, and the production efficiency of the product is improved.

In some embodiments, with continued reference to fig. 4, the display module 100 further includes a light shielding layer 60 to prevent light leakage from the side of the display panel 10. The light shielding layer 60 is disposed between the connection layer 20 and the cover plate 30. The material of the light shielding layer 60 may be a light-impermeable material such as ink. The light shielding layer 60 is located at an edge region of the cover plate 30, and specifically, the light shielding layer 60 covers the first groove G to prevent the first groove G from being exposed from the display side of the display panel 10, so as to improve the display effect of the display module 100.

In some embodiments, with continued reference to fig. 4, the display module 100 may further include a Back Film (BF) 70. The back film 70 is disposed on the non-display side of the display panel 10. Illustratively, the back film 70 is disposed on a side of the display portion 11 adjacent to the binding portion 13, and the back film 70 is also disposed on a side of the binding portion 13 adjacent to the display portion 11. When the display panel 10 is bent via the bending portion 12 and the binding portion 13 is disposed on the non-display side of the display portion 11, the back film 70 provides a supporting force to the display portion 11 and the binding portion 13 of the display panel 10, so as to achieve a better bending effect. The material of the back film 70 may be one of polyethylene terephthalate (Polyethylene terephthalate, PET), polyimide (PI) or cyclic olefin polymer (Cyclo olefin polymer, COP).

In some embodiments, with continued reference to fig. 4, the display module 100 may further include a heat sink film 80. The heat dissipation film 80 is provided on the non-display side of the display panel 10, and is capable of buffering stress acting on the display panel 10, dissipating heat generated when the display panel 10 is in operation, and protecting the display panel 10 to a certain extent. Illustratively, the heat dissipation film 80 is disposed between the display portion 11 and the binding portion 13. The heat sink film 80 may be a composite film of a mesh adhesive, foam, and copper foil, such as a Super Clean Foam (SCF) composite film.

In some embodiments, with continued reference to fig. 4, the display module 100 may also include a Bending Spacer (Bending Spacer) 90. The bending spacer 90 is disposed between the display portion 11 and the binding portion 13 to prevent the bending display panel 10 from bouncing. Illustratively, the bending pad 90 is connected to the heat dissipation film 80 on one side and to the back film 70 on the other side of the binding portion 13 near the display portion 11.

The foregoing is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art who is skilled in the art will recognize that changes or substitutions are within the technical scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A display module, comprising:

a display panel having a display area and a non-display area on a display side thereof;

the cover plate is arranged on the display side of the display panel;

the connecting layer is arranged between the display panel and the cover plate; the connecting layer is provided with a first sub-part and a second sub-part, the first sub-part is positioned in the display area in the orthographic projection to the reference plane, and the second sub-part is positioned in the non-display area; the reference surface is a plane where the cover plate is far away from the surface of the display panel;

Wherein the second sub-portion is provided with at least one first groove.

2. The display module of claim 1, wherein in a cross section of the first groove along a direction perpendicular to the reference plane, the first groove includes a first sidewall and a second sidewall, the first sidewall and the second sidewall being curved or linear.

3. The display module of claim 2, wherein the first sidewall has opposite first and second ends in a direction perpendicular to the reference plane; in an orthographic projection to the reference plane, a first end and a second end of the first side wall do not overlap, and at least one of the first end and the second end is located on a side surface of the connection layer;

and/or the number of the groups of groups,

the second side wall has opposite third and fourth ends along a direction perpendicular to the reference plane; the third end and the fourth end of the second side wall are not overlapped, and at least one of the third end and the fourth end is positioned on one side surface of the connecting layer.

4. A display module according to claim 3, wherein in orthographic projection onto the reference plane, a distance from the first end to the second end of the first side wall is greater than or equal to a thickness of the connection layer and less than a width of the second sub-portion;

And/or the number of the groups of groups,

in an orthographic projection onto the reference plane, a distance from the third end to the fourth end of the second sidewall is greater than or equal to a thickness of the connection layer and less than a width of the second sub-portion.

5. The display module according to claim 2, wherein the first side wall and/or the second side wall comprises a first sub-wall and a second sub-wall connected to each other, the first sub-wall being rectilinear and the second sub-wall being circular arc in a cross section of the first recess in a direction perpendicular to the reference plane; the ratio of the dimension of the second sub-wall in the direction perpendicular to the reference plane to the thickness of the connection layer is less than or equal to 1/2.

6. The display module assembly of claim 5, wherein at least one second recess is disposed in the first sub-wall in a direction perpendicular to the reference plane.

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

in an orthographic projection onto the reference surface, a distance from the first recess to the display area is greater than or equal to 0.1mm.

8. The display module of claim 1, wherein a distance from the first groove to a peripheral boundary of the connection layer closest to the first groove is greater than or equal to 0.05mm.

9. The display module of claim 1, wherein, in the orthographic projection onto the reference surface, gaps between the plurality of first grooves are greater than or equal to a dimension of the first grooves in a set direction, the set direction being parallel to the reference surface.

10. The display module assembly of claim 1, wherein the plurality of first grooves are staggered.

11. The display module according to any one of claims 1 to 10, further comprising:

the polaroid is arranged between the connecting layer and the display panel; the polarizer is provided with at least one third groove, and the third groove is positioned in the non-display area in the orthographic projection to the reference surface.

12. The display module of claim 11, wherein the first recess and the third recess are symmetrical structures.

13. The display module of claim 1 or 11, further comprising:

the shading layer is arranged between the connecting layer and the cover plate; the light shielding layer covers the first groove.

14. A display device, comprising:

a display module according to any one of claims 1 to 13, and

And the circuit board is connected with the display module.