Display module and display device

Abstract

The invention relates to the technical field of display, in particular to a display module and a display device. The display module comprises a first display area and a second display area, the second display area surrounds at least part of the first display area, and the bending curvature of the second display area is larger than that of the first display area; the display module further comprises a display panel, a cover plate and a bonding layer, the cover plate is located on the light emitting side of the display panel, and the bonding layer is located between the cover plate and the display panel; the display module further comprises a first coating, the first coating is located in the second display area and located between the cover plate and the bonding layer, and the dyne value of the first coating is larger than the dyne value of the surface of the side, close to the bonding layer, of the cover plate. The reliability and the display effect of the display module are effectively improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and in particular, to a display module and a display device. Background Art

[0002] A curved display screen can achieve a narrower border and better touch feeling, enabling it to obtain a larger display area within a limited space. In particular, a four-curved display screen not only includes curved display areas on both left and right sides, but also on both upper and lower sides, thus being able to achieve a better visual effect. However, in the low-temperature drop test of the existing curved display screens, air bubbles are likely to appear at the edges of the curved display screen, thereby affecting the reliability and display effect of the curved display screen. Summary of the Invention

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a display module and a display device, effectively improving the reliability and display effect of the display module.

[0004] The present disclosure provides a display module, including: a first display area and a second display area, the second display area surrounding at least part of the first display area, and the bending curvature of the second display area being greater than that of the first display area; the display module further includes a display panel, a cover plate, and an adhesive layer, the cover plate being located on the light-emitting side of the display panel, and the adhesive layer being located between the cover plate and the display panel; the display module further includes a first coating, the first coating being located in the second display area, the first coating being located between the cover plate and the adhesive layer, and the dyne value of the first coating being greater than the dyne value of the surface of the cover plate close to the adhesive layer.

[0005] The present disclosure further provides a display device, including the above display module.

[0006] The technical solution provided by the present disclosure has the following advantages compared with the prior art:

[0007] In the display module provided by the present disclosure, the display module further includes a first coating. The first coating is located in the second display area and is between the cover plate and the adhesive layer, that is, the first coating is provided on the surface of the cover plate on the side facing the display panel when the cover plate is in the second display area. The dyne value of the first coating is relatively large, that is, the dyne value of the first coating is greater than the dyne value of the surface of the cover plate close to the adhesive layer. Therefore, the setting of the first coating is beneficial to increasing the adhesion between the adhesive layer and the cover plate in at least part of the second display area, so that during the low-temperature drop test, the adhesion between the adhesive layer and the cover plate in at least part of the second display area is greater than the shear force between the adhesive layer and the cover plate in the second display area after being impacted. Furthermore, even if the adhesiveness of the adhesive layer decreases in a low-temperature environment, it can still ensure that the adhesive layer and the cover plate in at least part of the second display area are firmly bonded, reducing the risk that the shear force between the adhesive layer and the cover plate in the second display area is greater than the adhesion between the adhesive layer and the cover plate during the low-temperature drop test, resulting in separation between the adhesive layer and the cover plate and generating bubbles, thereby improving the reliability and display effect of the display module. And the dyne value of the first coating is relatively large, that is, the dyne value of the first coating is greater than the dyne value of the surface of the cover plate close to the adhesive layer. The setting of the first coating with a relatively high dyne value is beneficial to reducing the generation of bubbles during the bonding process between the cover plate and the adhesive layer, improving the display effect of the display module.

[0008] Correspondingly, the display device provided by the present disclosure also has the above technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0010] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0011] Figure 1 is a schematic plan view of a display module provided by the present disclosure;

[0012] Figure 2 is Figure 1 a cross-sectional view of the said display module along A - A';

[0013] Figure 3 is Figure 1 another cross-sectional view of the said display module along A - A';

[0014] Figure 4 is Figure 3 an enlarged view of part B of the said display module;

[0015] Figure 5 is Figure 1 Another cross-sectional view of the display module along A-A';

[0016] Figure 6 is Figure 5 An enlarged view of part C in the display module;

[0017] Figure 7 is Figure 1 Another cross-sectional view of the display module along A-A';

[0018] Figure 8 is Figure 1 Another cross-sectional view of the display module along A-A';

[0019] Figure 9 is Figure 1 Another cross-sectional view of the display module along A-A';

[0020] Figure 10 is Figure 1 Another cross-sectional view of the display module along A-A';

[0021] Figure 11 is Figure 1 Another cross-sectional view of the display module along A-A';

[0022] Figure 12 is Figure 1 Another cross-sectional view of the display module along A-A';

[0023] Figure 13 is Figure 12 An enlarged view of part D in the display module;

[0024] Figure 14 is Figure 1 Another cross-sectional view of the display module along A-A';

[0025] Figure 15 is Figure 1 Another cross-sectional view of the display module along A-A';

[0026] Figure 16 is Figure 1 Another cross-sectional view of the display module along A-A';

[0027] Figure 17 is Figure 1 Another cross-sectional view of the display module along A-A';

[0028] Figure 18 is Figure 1Another cross-sectional view of the display module along A-A';

[0029] Figure 19 is Figure 18 An enlarged view of part E in the display module;

[0030] Figure 20 is a schematic plan view of a display device provided by the present disclosure. Detailed implementation manners

[0031] In order to more clearly understand the above-mentioned objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0032] In the following description, many specific details are set forth to facilitate a thorough understanding of the present disclosure, but the present disclosure may be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all of the embodiments.

[0033] Figure 1 is a schematic plan view of a display module provided by the present disclosure, Figure 2 is Figure 1 A cross-sectional view of the display module along A-A', refer to Figure 1 and Figure 2 , embodiments of the present disclosure provide a display module, including: a first display area AA1 and a second display area AA1, the second display area AA2 surrounds at least part of the first display area AA1, and the bending curvature of the second display area AA2 is greater than the bending curvature of the first display area AA1;

[0034] The display module further includes a display panel 10, a cover plate 20 and an adhesive layer 30, the cover plate 20 is located on the light-emitting side of the display panel 10, and the adhesive layer 30 is located between the cover plate 20 and the display panel 10;

[0035] The display module further includes a first coating layer 40, the first coating layer 40 is located in the second display area AA2, the first coating layer 40 is located between the cover plate 20 and the adhesive layer 30, and the dyne value of the first coating layer 40 is greater than the dyne value of the surface of the cover plate 20 on the side close to the adhesive layer 30.

[0036] Specifically, the display module provided in this embodiment includes a first display area AA1 and a second display area AA1. Both the first display area AA1 and the second display area AA1 are used to realize the display of the picture. The bending curvature of the second display area AA2 is greater than the bending curvature of the first display area AA1, that is, the bending degree of the second display area AA2 is greater than the bending degree of the first display area AA1. Optionally, the first display area AA1 may be a flat display area, that is, the bending curvature of the first display area AA1 may be 0.

[0037] The display module further includes a display panel 10, a cover plate 20, and an adhesive layer 30. Among them, the display panel 10 is a flexible display panel, that is, the display panel 10 includes a flexible substrate, and the flexible substrate can be a flexible polymer material to ensure that the display panel 10 can be bent. The display panel 10 includes a part in the first display area AA1 and a part in the second display area AA2, and the display panel 10 further includes a plurality of display devices (not shown in the figure), so as to realize the display of the first display area AA1 and the second display area AA2 in the display module. The cover plate 20 can be a glass cover plate or other encapsulation cover plates. The cover plate 20 is disposed on the light-emitting side of the display panel 10, mainly for protecting the display panel 10 to prevent the display module from being damaged by an external impact force and damaging the display devices in the display panel 10. The adhesive layer 30 is bonded between the cover plate 20 and the display panel 10, so as to realize the bonding between the cover plate 20 and the display panel 10.

[0038] At present, to meet the needs of customers, the display module needs to be subjected to a low-temperature drop test before leaving the factory. During the low-temperature drop test, the bending curvature of the second display area is relatively large, and the impact force received by the cover plate in the second display area is the largest. As a result, a shear force that separates the adhesive layer and the cover plate will be generated between the adhesive layer and the cover plate in the second display area. Since the characteristics of the adhesive layer will change in a low-temperature environment, mainly manifested as an increase in the hardness of the adhesive layer and a decrease in the adhesiveness of the adhesive layer, the part of the cover plate located in the second display area will be deformed during the drop process. Furthermore, the shear force between the adhesive layer and the cover plate in the second display area will be greater than the adhesive force between the adhesive layer and the cover plate, so that it is easy to separate the adhesive layer and the cover plate and generate bubbles, affecting the reliability and display effect of the display module.

[0039] In the display module provided in this embodiment, the display module further includes a first coating layer 40. The first coating layer 40 is located in the second display area AA2, and the first coating layer 40 is located between the cover plate 20 and the adhesive layer 30. That is, the first coating layer 40 is provided on the surface of the cover plate 20 on the side facing the display panel 10 in the second display area AA2. The surface energy value of the first coating layer 40 is relatively large, that is, the surface energy value of the first coating layer 40 is greater than the surface energy value of the side of the cover plate 20 close to the adhesive layer 30. Therefore, the setting of the first coating layer 40 is beneficial to increasing the adhesive force between the adhesive layer 30 and the cover plate 20 in at least part of the second display area AA2, so that during the low-temperature drop test, the adhesive force between the adhesive layer 30 and the cover plate 20 in at least part of the second display area AA2 is greater than the shear force between the adhesive layer 30 and the cover plate 20 in the second display area AA2 after being impacted. Furthermore, even if the adhesiveness of the adhesive layer 30 decreases in a low-temperature environment, it can still ensure that the adhesive layer 30 and the cover plate 20 in at least part of the second display area AA2 are firmly bonded, reducing the risk that the shear force between the adhesive layer 30 and the cover plate 20 in the second display area AA2 is greater than the adhesive force between the adhesive layer 30 and the cover plate 20 during the low-temperature drop test, resulting in the separation between the adhesive layer 30 and the cover plate 20 and the generation of bubbles, and improving the reliability and display effect of the display module. And the surface energy value of the first coating layer 40 is relatively large, that is, the surface energy value of the first coating layer 40 is greater than the surface energy value of the side of the cover plate 20 close to the adhesive layer 30. The setting of the first coating layer 40 with a relatively high surface energy value is beneficial to reducing the generation of bubbles during the bonding process between the cover plate 20 and the adhesive layer 30, and improving the display effect of the display module.

[0040] It should be noted that the surface energy value of the first coating layer 40 can be flexibly adjusted according to the specific conditions of the cover plate 20 and the adhesive layer 30. Exemplarily, it can be set within the range of 38-50 Dyne / cm, and it is only necessary to ensure that its surface energy value is greater than the surface energy value of the side of the cover plate 20 close to the adhesive layer 30. The present disclosure will not elaborate further here.

[0041] It should be noted that since the cover plate 20 is used to protect the display panel 10 and prevent the display module from being damaged by external impact forces to the display device in the display panel 10, during the low-temperature drop test, the impact force is mainly absorbed by the cover plate 20, that is, the shear force is concentrated between the cover plate 20 and the adhesive layer 30. Therefore, in the embodiment of the present disclosure, a first coating layer 40 with a relatively large surface energy value is mainly provided on the part of the cover plate 20 in the second display area AA2 to increase the adhesive force between the adhesive layer 30 and the cover plate 20 in the second display area AA2, so as to reduce the risk of separation between the adhesive layer 30 and the cover plate 20 in the second display area AA2 and the generation of bubbles during the low-temperature drop test; at the same time, to reduce the generation of bubbles during the bonding process between the cover plate 20 and the adhesive layer 30.

[0042] Continue to refer to Figure 1 and Figure 2, in some alternative embodiments, the second display area AA2 includes a first edge area AA21, a second edge area AA22, and a corner area AA23. The extending directions of the first edge area AA21 and the second edge area AA22 intersect, and the first edge area AA21 and the second edge area AA22 intersect at the corner area AA23;

[0043] The first coating 40 is at least located in the corner area AA23.

[0044] Specifically, the second display area AA2 includes a first edge area AA21, a second edge area AA22, and a corner area AA23. The extending directions of the first edge area AA21 and the second edge area AA22 intersect, and the first edge area AA21 and the second edge area AA22 intersect at the corner area AA23, that is, the corner area AA23 includes a part of the first edge area AA21 and a part of the second edge area AA22. Since the bending curvature of the first edge area 1121 is greater than that of the second edge area AA22, that is, the corner area AA23 includes two parts with different bending curvatures. Therefore, during the low-temperature drop test, the shear force generated in the corner area AA23 after being impacted is the largest. Thus, the first coating 40 is provided in the corner area AA23, that is, the first coating 40 is provided on the surface of the cover plate 20 located in the corner area AA23 and facing the display panel 10. The dyne value of the first coating 40 is relatively large, that is, the dyne value of the first coating 40 is greater than the dyne value of the surface of the cover plate 20 close to the adhesive layer 30. Therefore, the provision of the first coating 40 is beneficial to increasing the adhesive force between the adhesive layer 30 and the cover plate 20 in the corner area AA23, so that during the low-temperature drop test, the adhesive force between the adhesive layer 30 and the cover plate 20 in the corner area AA23 is greater than the shear force between the adhesive layer 30 and the cover plate 20 in the corner area AA23 after being impacted. Furthermore, even if the adhesiveness of the adhesive layer 30 decreases in a low-temperature environment, it can still ensure that the adhesive layer 30 and the cover plate 20 in the corner area AA23 are firmly bonded, reducing the risk that the shear force between the adhesive layer 30 and the cover plate 20 in the corner area AA23 is greater than the adhesive force between the adhesive layer 30 and the cover plate 20 during the low-temperature drop test, resulting in the separation between the adhesive layer 30 and the cover plate 20 and the generation of bubbles, and improving the reliability and display effect of the display module.

[0045] Figure 3 Yes Figure 1 Another cross-sectional view of the display module along A - A'; Figure 4 Yes Figure 3 An enlarged view of part B in the display module, refer to Figure 1 、 Figure 3 And Figure 4 , in some alternative embodiments, the surface of the cover plate 20 close to the display panel 10 is provided with a microprism structure 21, and the microprism structure 21 is located in the second display area AA2;

[0046] At least a part of the micro - prism structure 21 is in contact with the first coating 40.

[0047] Specifically, a micro - prism structure 21 is provided on the surface of the cover plate 20 close to the display panel 10. The micro - prism structure 21 is located in the second display area AA2, that is, a micro - prism structure 21 is formed on the surface of the cover plate 20 close to the display panel 10, which is beneficial to increasing the surface roughness of the surface of the cover plate 20 close to the display panel 10. At least a part of the micro - prism structure 21 is in contact with the first coating 40. That is, first, in the second display area AA2, a micro - prism structure 21 is formed on the surface of the cover plate 20 close to the display panel 10, and then the first coating 40 is formed on the surface of the cover plate 20 close to the display panel 10. This is beneficial to coating and forming the first coating 40 on the cover plate 20, and expands the actual contact area between the cover plate 20 and the first coating 40, which can significantly improve the adhesion strength between the first coating 40 and the cover plate 20, effectively reduce the risk of peeling between the first coating 40 and the cover plate 20, and improve the reliability of the display module.

[0048] The bending degree of the second display area AA2 is greater than that of the first display area AA1, that is, the second display area AA2 has a larger bending degree. Thus, in the second display area AA2, the light emitted by the display panel 10 is subject to more reflection interference. A micro - prism structure 21 is provided in the second display area AA2. The micro - prism structure 21 can scatter light, which is beneficial to reducing the reflection interference in the second display area AA2 and improving the display effect.

[0049] Optionally, the micro - prism structure 21 can be directly formed on the surface of the cover plate 20 close to the display panel 10 by hot - bending die forming, or the micro - prism structure 21 can be formed by etching or physical - chemical deposition on the inner surface after the cover plate 20 is formed. Of course, other processes can also be used to form the micro - prism structure 21 on the surface of the cover plate 20 close to the display panel 10, and details are not described herein again in this disclosure.

[0050] It should be noted that Figure 3 and Figure 4 exemplarily show that the surface of the cover plate 20 close to the display panel 10 protrudes to form the micro - prism structure 21. In other embodiments of this disclosure, the micro - prism structure can also be formed by recessing on the surface of the cover plate close to the display panel, and details are not described one by one herein in this disclosure.

[0051] Figure 5 is Figure 1 Another cross - sectional view of the display module along A - A'. Figure 6 is Figure 5 An enlarged view of part C in the display module, refer to Figure 1 、 Figure 5 andFigure 6 , in some alternative embodiments, along the direction from the first display area AA1 to the second display area AA2, the density of the microprism structure 21 gradually increases.

[0052] Specifically, the bending degree of the second display area AA2 is greater than that of the first display area AA1. The second display area AA2 requires stronger adhesion to cope with the stress caused by bending. Along the direction from the first display area AA1 to the second display area AA2, the stress caused by the bending of the second display area AA2 gradually increases. Therefore, it is set that along the direction from the first display area AA1 to the second display area AA2, the density of the microprism structure 21 gradually increases. The increase in the density of the microprism structure 21 can improve the surface roughness of the cover plate 20 and enhance the bonding with the first coating 40, that is, along the direction from the first display area AA1 to the second display area AA2, the adhesion between the first coating 40 and the cover plate 20 gradually increases, which can further reduce the risk of peeling between the first coating 40 and the cover plate 20 and improve the reliability of the display module. At the same time, along the direction from the first display area AA1 to the second display area AA2, the density of the microprism structure 21 gradually increases, which helps to improve the overall structural stability of the area corresponding to the cover plate 20 and the first coating 40 and avoid stress concentration caused by sudden changes.

[0053] The bending degree of the second display area AA2 is greater than that of the first display area AA1, that is, the second display area AA2 has a larger bending degree. Therefore, in the second display area AA2, the light emitted by the display panel 10 is subject to more reflection interference. Along the direction from the first display area AA1 to the second display area AA2, the reflection interference received by the second display area AA2 gradually increases. Along the direction from the first display area AA1 to the second display area AA2, the density of the microprism structure 21 gradually increases, which is beneficial to making the reflection interference in each area of the second display area AA2 the same and improving the display uniformity.

[0054] Figure 7 Yes Figure 1 Another cross-sectional view of the display module along A-A', refer to Figure 1 And Figure 7 , in some alternative embodiments, the surface of the cover plate 20 close to the display panel 10 is provided with a plurality of grooves 22. The grooves 22 are recessed in the direction away from the display panel 10, and the first coating 40 is located in the grooves 22.

[0055] Specifically, a plurality of grooves 22 are provided on the surface of the cover plate 20 close to the display panel 10. The grooves 22 are recessed in a direction away from the display panel 10. The first coating 40 is located in the grooves 22. The grooves 22 help lock the coating material, prevent the coating material from shifting or flowing out during subsequent processes, and ensure the uniformity and stability of the first coating 40 formed subsequently. The dyne value of the first coating 40 is relatively large, that is, the dyne value of the first coating 40 is greater than the dyne value of the surface of the cover plate 20 close to the adhesive layer 30. Therefore, the first coating 40 provided in the grooves 22 is beneficial to increasing the adhesive force between the adhesive layer 30 and the cover plate 20 in at least part of the second display area AA2, so that during the low-temperature drop test, the adhesive force between the adhesive layer 30 and the cover plate 20 in at least part of the second display area AA2 is greater than the shear force between the adhesive layer 30 and the cover plate 20 in the second display area AA2 after being impacted. Furthermore, even if the adhesiveness of the adhesive layer 30 decreases in a low-temperature environment, it can still ensure that the adhesive layer 30 and the cover plate 20 in at least part of the second display area AA2 are firmly bonded, reducing the risk that the shear force between the adhesive layer 30 and the cover plate 20 in the second display area AA2 is greater than the adhesive force between the adhesive layer 30 and the cover plate 20 during the low-temperature drop test, resulting in the separation between the adhesive layer 30 and the cover plate 20 and generating bubbles, and improving the reliability and display effect of the display module. And the dyne value of the first coating 40 is relatively large, that is, the dyne value of the first coating 40 is greater than the dyne value of the surface of the cover plate 20 close to the adhesive layer 30. The setting of the first coating 40 with a relatively high dyne value is beneficial to reducing the generation of bubbles during the bonding process between the cover plate 20 and the adhesive layer 30, and improving the display effect of the display module.

[0056] Meanwhile, the first coating 40 is arranged in the grooves 22. The wrapping effect of the grooves 22 on the first coating 40 can reduce the erosion of the coating material by the external environment (such as humidity and high temperature), and extend the stability of the interface bonding.

[0057] Moreover, a plurality of grooves 22 are provided on the surface of the cover plate 20 close to the display panel 10. The grooves 22 are recessed in a direction away from the display panel 10. The first coating 40 is located in the grooves 22, which is beneficial to the spreading of the adhesive layer 30 in the second display area AA2, beneficial to improving the uniformity of the thickness of the adhesive layer 30, thus beneficial to improving the uniformity of the overall thickness of the display module, and thus improving the overall brightness uniformity of the display module.

[0058] Furthermore, the groove 22 provided on the surface of the cover plate 20 close to the display panel 10 in the second display area AA2 effectively absorbs the stress when the second display area AA2 is bent, avoiding the situation that the cover plate 20 cracks due to stress concentration when the second display area AA2 is bent. Moreover, the groove 22 in the second display area AA2 can deform synchronously during dynamic bending, reducing the interfacial shear stress, further reducing the risk of bubbles generated by the separation between the bonding layer 30 and the cover plate 20, and improving the reliability and display effect of the display module.

[0059] Continue to refer to Figure 1 and Figure 7 In some alternative embodiments, along the direction perpendicular to the display panel 10, the height of the first coating 40 is the same as the depth of the groove 22.

[0060] Specifically, a plurality of grooves 22 are provided on the surface of the cover plate 20 close to the display panel 10. The grooves 22 are recessed in the direction away from the display panel 10. The first coating 40 is filled in the grooves 22. Along the direction perpendicular to the display panel 10, the height of the first coating 40 is the same as the depth of the groove 22, that is, the surface of the first coating 40 close to the display panel 10 is aligned with the surface of the cover plate close to the display panel 10, which is beneficial to improving the spreading uniformity of the bonding layer 30 and the fitting yield of the display panel 10 and the cover plate 20 in the display module.

[0061] Figure 8 is Figure 1 Another cross-sectional view of the display module along A-A', refer to Figure 1 and Figure 8 In some alternative embodiments, along the direction perpendicular to the display panel 10, the height of the first coating 40 is less than the depth of the groove 22;

[0062] The bonding layer 30 is partially located in the groove 22.

[0063] Specifically, a plurality of grooves 22 are provided on the surface of the cover plate 20 close to the display panel 10. The grooves 22 are recessed in a direction away from the display panel 10. The first coating 40 is filled in the grooves 22, and along the direction perpendicular to the display panel 10, the height of the first coating 40 is less than the depth of the grooves 22, that is, the first coating 40 cannot completely fill the grooves 22. Thus, when the cover plate 20 and the display panel 10 are adhered, the adhesive layer 30 will be partially located in the grooves 22, that is, the adhesive layer 30 is in contact with the first coating 40 in the grooves 22 and the cover plate 20 at the same time. The side wall of the groove 22 forms an engagement with the embedded adhesive layer 30, effectively resisting the shear force between the adhesive layer 30 and the cover plate 20 in the second display area AA2 during the low-temperature drop test, thereby effectively reducing the risk of bubbles generated by the separation between the adhesive layer 30 and the cover plate 20, and improving the reliability and display effect of the display module. And the adhesive layer 30 will be partially located in the grooves 22, which is beneficial to increasing the contact area between the adhesive layer 30 and the cover plate 20, can significantly improve the adhesion strength between the adhesive layer 30, the first coating 40 and the cover plate 20, effectively reduce the risk of peeling between the adhesive layer 30, the first coating 40 and the cover plate 20, and improve the reliability of the display module.

[0064] Meanwhile, the adhesive layer 30 in the grooves 22 can effectively absorb the stress when the second display area AA2 is bent, avoiding the situation that the cover plate 20 cracks due to stress concentration when the second display area AA2 is bent.

[0065] Figure 9 Yes Figure 1 Another cross-sectional view of the display module along A-A', refer to Figure 1 and Figure 9 , in some alternative embodiments, the groove 22 includes a relatively arranged first bottom 221 and a first top 222. The first bottom 221 is located at one end of the groove 22 away from the display panel 10, and the first top 222 is located at one end of the groove 22 close to the display panel 10. The area of the vertical projection pattern of the first bottom 221 on the display panel 10 is larger than the area of the vertical projection pattern of the first top 222 on the display panel 10.

[0066] Specifically, the groove 22 includes a first bottom 221 and a first top 222 which are oppositely arranged. The first bottom 221 is located at one end of the groove 22 away from the display panel 10, and the first top 222 is located at one end of the groove 22 close to the display panel 10. The size of the first bottom 221 is larger than that of the first top 222. The surface of the cover plate 20 on the side close to the display panel 10 is provided with a plurality of grooves 22. The grooves 22 are recessed in the direction away from the display panel 10. The first coating 40 is filled in the grooves 22. Along the direction perpendicular to the display panel 10, the height of the first coating 40 is less than the depth of the grooves 22, that is, the first coating 40 cannot completely fill the grooves 22. Therefore, when the cover plate 20 and the display panel 10 are adhered, the adhesive layer 30 will be partially located in the grooves 22. The grooves 22 and the part of the adhesive layer 30 located inside the grooves 22 form an interlocking structure, which can further improve the adhesion strength between the adhesive layer 30, the first coating 40 and the cover plate 20, effectively reduce the risk of peeling between the adhesive layer 30, the first coating 40 and the cover plate 20, and improve the reliability of the display module.

[0067] Figure 10 Yes Figure 1 Another cross-sectional view of the display module along A-A’, reference Figure 1 and Figure 10 , in some alternative embodiments, along the direction from the first display area AA1 to the second display area AA2, the density of the grooves 22 gradually increases.

[0068] Specifically, the bending degree of the second display area AA2 is greater than that of the first display area AA1. During the low-temperature drop test, the shear force generated after the second display area AA2 is impacted is large, and the shear force received at one end of the second display area AA2 away from the first display area AA1 is the largest. Thus, along the direction from the first display area AA1 to the second display area AA2, the setting density of the grooves 22 gradually increases. Correspondingly, along the direction from the first display area AA1 to the second display area AA2, the setting density of the first coating 40 also gradually increases. The surface tension value of the first coating 40 is large. The first coating 40 provided in the grooves 22 is beneficial to increasing the adhesion between the adhesive layer 30 and the cover plate 20. Thus, along the direction from the first display area AA1 to the second display area AA2, the adhesion between the adhesive layer 30 and the cover plate 20 also gradually increases, so that during the low-temperature drop test, the adhesion between the adhesive layer 30 and the cover plate 20 in each area of the second display area AA2 is greater than the shear force between the adhesive layer 30 and the cover plate 20 after being impacted. Furthermore, even if the adhesiveness of the adhesive layer 30 decreases in a low-temperature environment, the adhesive layer 30 and the cover plate 20 in different areas of the second display area AA2 can still be firmly adhered, reducing the risk that during the low-temperature drop test, the shear force between the adhesive layer 30 and the cover plate 20 in the second display area AA2 is greater than the adhesion between the adhesive layer 30 and the cover plate 20, resulting in the separation between the adhesive layer 30 and the cover plate 20 and generating bubbles, and improving the reliability and display effect of the display module.

[0069] Figure 11 Yes Figure 1 Another cross-sectional view of the display module along A-A', refer to Figure 1 and Figure 11 In some alternative embodiments, the groove 22 includes a first bottom 221. The first bottom 221 is located at one end of the groove 22 away from the display panel 10. Along the direction from the first display area AA1 to the second display area AA2, the area of the vertical projection pattern of the first bottom 221 on the display panel 10 gradually increases.

[0070] Specifically, the bending degree of the second display area AA2 is greater than that of the first display area AA1. During the low-temperature drop test, the shear force generated after the second display area AA2 is impacted is relatively large, and the shear force is the largest at one end of the second display area AA2 far from the first display area AA1. Thus, along the direction from the first display area AA1 to the second display area AA2, the area of the vertical projection pattern of the first bottom 221 on the display panel 10 gradually increases. Correspondingly, along the direction from the first display area AA1 to the second display area AA2, the set size of the first coating 40 also gradually increases. The dyne value of the first coating 40 is relatively large. The first coating 40 provided in the groove 22 is beneficial to increasing the adhesion between the adhesive layer 30 and the cover plate 20. Thus, along the direction from the first display area AA1 to the second display area AA2, the adhesion between the adhesive layer 30 and the cover plate 20 also gradually increases, so that during the low-temperature drop test, the adhesion between the adhesive layer 30 and the cover plate 20 in each area of the second display area AA2 is greater than the shear force between the adhesive layer 30 and the cover plate 20 after being impacted. Furthermore, even if the adhesiveness of the adhesive layer 30 decreases in a low-temperature environment, it can still firmly bond the adhesive layer 30 and the cover plate 20 in different areas of the second display area AA2, reducing the risk that the shear force between the adhesive layer 30 and the cover plate 20 in the second display area AA2 is greater than the adhesion between the adhesive layer 30 and the cover plate 20 during the low-temperature drop test, resulting in separation between the adhesive layer 30 and the cover plate 20 and generating bubbles, and improving the reliability and display effect of the display module.

[0071] Figure 12 Yes Figure 1 Another cross-sectional view of the display module along A-A'. Figure 13 Yes Figure 12 An enlarged view of part D in the display module, refer to Figure 1 、 Figure 12 And Figure 13 In some alternative embodiments, the groove 22 includes a first bottom 221. The first bottom 221 is located at one end of the groove 22 far from the display panel 10, and the first bottom 221 is provided with a microprism structure 21.

[0072] Specifically, the first bottom 221 is provided with a microprism structure 21, which is beneficial to improving the roughness of the first bottom 221, facilitating the formation of the first coating 40 in the groove 22, and expanding the actual contact area between the first bottom 221 and the first coating 40. It can significantly improve the adhesion strength between the first coating 40 and the first bottom 221, effectively reducing the risk of peeling between the first coating 40 and the cover plate 20, and improving the reliability of the display module.

[0073] The bending degree of the second display area AA2 is greater than that of the first display area AA1, that is, the second display area AA2 has a greater bending degree. As a result, in the second display area AA2, the light emitted by the display panel 10 is subject to more reflection interference. A micro-prism structure 21 is provided on the first bottom 221 of the groove 22 in the second display area AA2. The micro-prism structure 21 can scatter light, thereby helping to reduce the reflection interference in the second display area AA2 and improving the display effect.

[0074] Continue to refer to Figure 1 、 Figure 12 and Figure 13 , in some alternative embodiments, along the direction perpendicular to the display panel 10, the height of the micro-prism structure 21 is less than the depth of the groove 22.

[0075] Specifically, the groove 22 is recessed away from the display panel 10. The first coating 40 is located in the groove 22. Along the direction perpendicular to the display panel 10, the height of the micro-prism structure 21 is less than the depth of the groove 22, so that the setting of the micro-prism structure 21 does not affect the setting of the first coating 40 in the groove 22.

[0076] Figure 14 is Figure 1 Another cross-sectional view of the display module along A-A'. Refer to Figure 1 and Figure 14 , in some alternative embodiments, a plurality of bumps 23 are provided on the surface of the cover plate 20 close to the display panel 10. The bumps 23 protrude towards the display panel 10, and the first coating 40 is provided between adjacent protrusions 23.

[0077] Specifically, a plurality of bumps 23 are provided on the surface of the cover plate 20 close to the display panel 10. The bumps 23 protrude toward the direction close to the display panel 10. A first coating layer 40 is provided between two adjacent bumps 23. The bumps 23 help to lock the coating material, prevent the coating material from shifting or flowing out during subsequent processes, and ensure the uniformity and stability of the subsequently formed first coating layer 40. The dyne value of the first coating layer 40 is relatively large, that is, the dyne value of the first coating layer 40 is greater than the dyne value of the surface of the cover plate 20 close to the adhesive layer 30. Therefore, the first coating layer 40 provided between two adjacent bumps 23 is beneficial to increasing the adhesive force between the adhesive layer 30 and the cover plate 20 in at least part of the second display area AA2, so that during the low-temperature drop test, the adhesive force between the adhesive layer 30 and the cover plate 20 in at least part of the second display area AA2 is greater than the shear force between the adhesive layer 30 and the cover plate 20 in the second display area AA2 after being impacted. Furthermore, even if the adhesiveness of the adhesive layer 30 decreases in a low-temperature environment, it can still ensure that the adhesive layer 30 and the cover plate 20 in at least part of the second display area AA2 are firmly bonded, reducing the risk that the shear force between the adhesive layer 30 and the cover plate 20 in the second display area AA2 is greater than the adhesive force between the adhesive layer 30 and the cover plate 20 during the low-temperature drop test, resulting in the separation between the adhesive layer 30 and the cover plate 20 and generating bubbles, and improving the reliability and display effect of the display module. And the dyne value of the first coating layer 40 is relatively large, that is, the dyne value of the first coating layer 40 is greater than the dyne value of the surface of the cover plate 20 close to the adhesive layer 30. The setting of the first coating layer 40 with a relatively high dyne value is beneficial to reducing the generation of bubbles during the bonding process between the cover plate 20 and the adhesive layer 30, and improving the display effect of the display module.

[0078] Meanwhile, the first coating layer 40 is provided between adjacent bumps 23. The wrapping effect of the bumps 23 on the first coating layer 40 can reduce the erosion of the coating material by the external environment (such as humidity and high temperature), and prolong the stability of the interface bonding.

[0079] Furthermore, a plurality of bumps 23 are provided on the surface of the cover plate 20 close to the display panel 10. The bumps 23 are arranged in the second display area AA2. The bumps 23 can serve as support points, effectively alleviating the deformation of the second display area AA2 after being impacted during the low-temperature drop test. Therefore, during the low-temperature drop test, the shear force between the adhesive layer 30 and the cover plate 20 in the second display area AA2 is effectively reduced, which is further beneficial to reducing the risk of separation between the adhesive layer 30 and the cover plate 20 and generating bubbles, and improving the reliability and display effect of the display module.

[0080] Continue to refer to Figure 1 and Figure 14 In some alternative embodiments, along the direction perpendicular to the display panel 10, the height of the first coating layer 40 is less than the height of the bumps 23.

[0081] The bonding layer 30 is partially located between two adjacent bumps 23.

[0082] Specifically, a plurality of bumps 23 are provided on the surface of the cover plate 20 close to the display panel 10. The bumps 23 protrude towards the direction close to the display panel 10. The first coating 40 is disposed between adjacent protrusions 23, and along the direction perpendicular to the display panel 10, the height of the first coating 40 is less than the height of the bumps 23, that is, the first coating 40 cannot completely fill the space between adjacent bumps 23. Thus, when the cover plate 20 and the display panel 10 are attached, the bonding layer 30 will be partially located between adjacent bumps 23, that is, the bonding layer 30 is in contact with the first coating 40 and the bumps 23 at the same time. The side wall of the bump 23 forms an engagement with the embedded bonding layer 30, effectively resisting the shear force between the bonding layer 30 and the cover plate 20 in the second display area AA2 during the low-temperature drop test, thereby effectively reducing the risk of bubbles generated by the separation between the bonding layer 30 and the cover plate 20, and improving the reliability and display effect of the display module. And the bonding layer 30 will be partially located between adjacent bumps 23, which is beneficial to increasing the contact area between the bonding layer 30 and the cover plate 20, can significantly improve the adhesion strength between the bonding layer 30, the first coating 40 and the cover plate 20, effectively reduce the risk of peeling between the bonding layer 30, the first coating 40 and the cover plate 20, and improve the reliability of the display module.

[0083] Figure 15 Yes Figure 1 Another cross-sectional view of the display module along A-A', refer to Figure 1 And Figure 15 In some alternative embodiments, the bump 23 includes a second bottom 231 and a second top 232 which are oppositely arranged. The second bottom 231 is located at one end of the bump 23 away from the display panel 10, and the second top 232 is located at one end of the bump 23 close to the display panel 10. The area of the vertical projection pattern of the second bottom 231 on the display panel 10 is smaller than the area of the vertical projection pattern of the second top 232 on the display panel 10.

[0084] Specifically, the bump 23 includes a second bottom 231 and a second top 232 which are oppositely arranged. The second bottom 231 is located at one end of the bump 23 away from the display panel 10, and the second top 232 is located at one end of the bump 23 close to the display panel 10. The size of the second bottom 231 is smaller than that of the second top 232. The first coating 40 is filled between adjacent bumps 23, and in the direction perpendicular to the display panel 10, the height of the first coating 40 is smaller than the height of the bump 23, that is, the first coating 40 cannot completely fill the space between adjacent bumps 23. Therefore, when the cover plate 20 and the display panel 10 are adhered, the adhesive layer 30 will be partially located between adjacent bumps 23. The bump 23 and the adhesive layer 30 form an interlocking structure, which can further improve the adhesion strength between the adhesive layer 30, the first coating 40 and the cover plate 20, effectively reduce the risk of peeling between the adhesive layer 30, the first coating 40 and the cover plate 20, and improve the reliability of the display module.

[0085] Figure 16 Yes Figure 1 Another cross-sectional view of the display module along A-A’, refer to Figure 1 and Figure 16 , in some alternative embodiments, along the direction from the first display area AA1 to the second display area AA2, the density of the bumps 23 gradually decreases.

[0086] Specifically, the bending degree of the second display area AA2 is greater than that of the first display area AA1. During the low-temperature drop test, the shear force generated after the second display area AA2 is impacted is larger, and the shear force at one end of the second display area AA2 away from the first display area AA1 is the largest. Therefore, along the direction from the first display area AA1 to the second display area AA2, the density of the bumps 23 gradually decreases. Correspondingly, along the direction from the first display area AA1 to the second display area AA2, the area of the first coating 40 provided between adjacent bumps 23 also gradually increases. The dyne value of the first coating 40 is larger. The first coating 40 provided between adjacent bumps 23 is beneficial to increasing the adhesion between the adhesive layer 30 and the cover plate 20. Therefore, along the direction from the first display area AA1 to the second display area AA2, the adhesion between the adhesive layer 30 and the cover plate 20 also gradually increases, so that during the low-temperature drop test, the adhesion between the adhesive layer 30 and the cover plate 20 in each area of the second display area AA2 is greater than the shear force between the adhesive layer 30 and the cover plate 20 after being impacted. Furthermore, even if the adhesiveness of the adhesive layer 30 decreases in a low-temperature environment, it can still firmly adhere the adhesive layer 30 and the cover plate 20 in different areas of the second display area AA2, reducing the risk that the shear force between the adhesive layer 30 and the cover plate 20 in the second display area AA2 is greater than the adhesion between the adhesive layer 30 and the cover plate 20 during the low-temperature drop test, resulting in the separation between the adhesive layer 30 and the cover plate 20 and generating bubbles, and improving the reliability and display effect of the display module.

[0087] Continue to refer to Figure 1 and Figure 16 In some alternative embodiments, along the direction from the first display area AA1 to the second display area AA2, the distance between two adjacent bumps 23 gradually increases.

[0088] Specifically, the bending degree of the second display area AA2 is greater than that of the first display area AA1. During the low-temperature drop test, the shear force generated after the second display area AA2 is impacted is relatively large, and the shear force received at one end of the second display area AA2 away from the first display area AA1 is the largest. Thus, along the direction from the first display area AA1 to the second display area AA2, the distance between two adjacent bumps 23 gradually increases. Correspondingly, along the direction from the first display area AA1 to the second display area AA2, the area of the first coating 40 provided between adjacent bumps 23 also gradually increases. The dyne value of the first coating 40 is relatively large. The first coating 40 provided between adjacent bumps 23 is conducive to increasing the adhesion between the adhesive layer 30 and the cover plate 20. Thus, along the direction from the first display area AA1 to the second display area AA2, the adhesion between the adhesive layer 30 and the cover plate 20 also gradually increases, so that during the low-temperature drop test, the adhesion between the adhesive layer 30 and the cover plate 20 in each area of the second display area AA2 is greater than the shear force between the adhesive layer 30 and the cover plate 20 after being impacted. Furthermore, even if the adhesiveness of the adhesive layer 30 decreases in a low-temperature environment, it can still firmly bond the adhesive layer 30 and the cover plate 20 in different areas of the second display area AA2, reducing the risk that during the low-temperature drop test, the shear force between the adhesive layer 30 and the cover plate 20 in the second display area AA2 is greater than the adhesion between the adhesive layer 30 and the cover plate 20, resulting in separation between the adhesive layer 30 and the cover plate 20 and generating bubbles, and improving the reliability and display effect of the display module.

[0089] It should be noted that Figure 16 exemplarily shows that along the direction from the first display area AA1 to the second display area AA2, the density of the bumps 23 gradually decreases, thereby realizing that along the direction from the first display area AA1 to the second display area AA2, the distance between two adjacent bumps 23 gradually increases. Optionally, in other embodiments of the present disclosure, referring to Figure 1 and Figure 17 , Figure 17 is Figure 1 Another cross-sectional view of the display module along A-A'. It can be realized that along the direction from the first display area AA1 to the second display area AA2, the distance between two adjacent bumps 23 gradually increases by setting that the size of the bumps 23 gradually decreases along the direction from the first display area AA1 to the second display area AA2. The present disclosure will not elaborate herein.

[0090] Figure 18 Yes Figure 1 Another cross-sectional view of the display module along A-A'. Figure 19 Yes Figure 18 An enlarged view of part E in the display module described above. Refer to Figure 1 , Figure 18 and Figure 19 , in some alternative embodiments, the surface of the cover plate 20 on the side close to the display panel 10 is provided with a microprism structure 21, and a microprism structure 21 is provided between two adjacent bumps 23.

[0091] Specifically, a microprism structure 21 is provided between two adjacent bumps 23, which is beneficial to improving the roughness of this part, facilitating the formation of a first coating 40 between two adjacent bumps 23, and expanding the actual contact area between the part of the cover plate 20 located between two adjacent bumps 23 and the first coating 40, which can significantly improve the adhesion strength between the first coating 40 and the cover plate 20, effectively reduce the risk of peeling between the first coating 40 and the cover plate 20, and improve the reliability of the display module.

[0092] The bending degree of the second display area AA2 is greater than that of the first display area AA1, that is, the second display area AA2 has a greater bending degree. As a result, in the second display area AA2, the light emitted by the display panel 10 is subject to more reflection interference. A microprism structure 21 is provided between two adjacent bumps 23 in the second display area AA2, and the microprism structure 21 can scatter light, which is beneficial to reducing the reflection interference in the second display area AA2 and improving the display effect.

[0093] Continue to refer to Figure 1 , Figure 18 and Figure 19 , in some alternative embodiments, along the direction perpendicular to the display panel 10, the height of the microprism structure 21 is less than the height of the bump 23.

[0094] Specifically, the bump 23 protrudes towards the direction close to the display panel 10, the first coating 40 is located between two adjacent bumps 23, and along the direction perpendicular to the display panel 10, the height of the microprism structure 21 is less than the height of the bump 23, so that the setting of the microprism structure 21 does not affect the setting of the first coating 40 between two adjacent bumps 23.

[0095] As Figure 20 shown Figure 20 is a schematic plan view of a display device provided by the present disclosure. The embodiments of the present disclosure also provide a display device 1000, including the display module 100 provided in any of the above embodiments. Figure 20The provided embodiments only take a mobile phone as an example to illustrate the display device. It can be understood that the display device provided by the embodiments of the present disclosure application can be any electronic product with a display function, including but not limited to the following categories: mobile phones, televisions, laptop computers, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, vehicle-mounted displays, medical devices, industrial control devices, touch interaction terminals, etc. The embodiments of the present disclosure do not make special limitations on this.

[0096] The display device 1000 provided by the embodiments of the present disclosure has the same technical features as the display module 100 provided by the above embodiments, so it can also solve the same technical problems and achieve the same technical effects.

[0097] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0098] The above are only the specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display module, characterized in that, Including: A first display area and a second display area, wherein the second display area surrounds at least part of the first display area, and the bending curvature of the second display area is greater than that of the first display area; The display module further includes a display panel, a cover plate, and an adhesive layer. The cover plate is located on the light-emitting side of the display panel, and the adhesive layer is located between the cover plate and the display panel; The display module further includes a first coating, which is located in the second display area and between the cover plate and the adhesive layer, and the dyne value of the first coating is greater than the dyne value of the surface of the cover plate close to the adhesive layer.

2. The display module according to claim 1, wherein: The surface of the cover plate close to the display panel is provided with a microprism structure, and the microprism structure is located in the second display area; At least part of the microprism structure is in contact with the first coating.

3. The display module according to claim 2, wherein: Along the direction from the first display area to the second display area, the density of the microprism structure gradually increases.

4. The display module according to claim 1, wherein: The surface of the cover plate close to the display panel is provided with a plurality of grooves, the grooves are recessed in a direction away from the display panel, and the first coating is located in the grooves.

5. The display module according to claim 4, wherein: Along the direction perpendicular to the display panel, the height of the first coating is the same as the depth of the groove.

6. The display module according to claim 4, wherein: Along the direction perpendicular to the display panel, the height of the first coating is less than the depth of the groove; Part of the adhesive layer is located in the groove.

7. The display module according to claim 6, wherein: The groove includes a first bottom and a first top which are oppositely arranged. The first bottom is located at one end of the groove away from the display panel, and the first top is located at one end of the groove close to the display panel. The area of the vertical projection pattern of the first bottom on the display panel is greater than the area of the vertical projection pattern of the first top on the display panel.

8. The display module according to claim 4, wherein: Along the direction from the first display area to the second display area, the density of the grooves gradually increases.

9. The display module according to claim 4, wherein: The groove includes a first bottom, which is located at one end of the groove away from the display panel. Along the direction from the first display area to the second display area, the area of the vertical projection pattern of the first bottom on the display panel gradually increases.

10. The display module according to claim 4, wherein: The groove includes a first bottom, which is located at one end of the groove away from the display panel, and the first bottom is provided with a microprism structure.

11. The display module according to claim 10, wherein: Along the direction perpendicular to the display panel, the height of the microprism structure is less than the depth of the groove.

12. The display module according to claim 1, wherein a plurality of bumps are provided on the surface of the cover plate close to the display panel side, the bumps protrude in a direction close to the display panel, and the first coating is provided between two adjacent protrusions.

13. The display module according to claim 12, wherein in a direction perpendicular to the display panel, the height of the first coating is less than the height of the bump; the adhesive layer is partially located between two adjacent bumps.

14. The display module according to claim 13, wherein the bump includes a second bottom and a second top which are oppositely arranged, the second bottom is located at one end of the bump far from the display panel, the second top is located at one end of the bump close to the display panel, and the area of the vertical projection pattern of the second bottom on the display panel is less than the area of the vertical projection pattern of the second top on the display panel.

15. The display module according to claim 14, wherein in a direction from the first display area to the second display area, the density of the bumps gradually decreases.

16. The display module according to claim 12, wherein in a direction from the first display area to the second display area, the distance between two adjacent bumps gradually increases.

17. The display module according to claim 12, wherein a microprism structure is provided on the surface of the cover plate close to the display panel side, and the microprism structure is provided between two adjacent bumps.

18. The display module according to claim 17, wherein in a direction perpendicular to the display panel, the height of the microprism structure is less than the height of the bump.

19. The display module according to claim 1, wherein the second display area includes a first edge area, a second edge area and a corner area, the extending direction of the first edge area intersects with the extending direction of the second edge area, and the first edge area and the second edge area intersect at the corner area; the first coating is at least located in the corner area.

20. A display device, characterized in that, The display device includes the display module according to any one of claims 1-19.

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