Display panel and display device

Abstract

The present application discloses a display panel and a display device. The display panel further comprises a panel body, a back plate, and a bending protection layer; the panel body comprises a display part, and the display part is located in a flat display area and a curved display area; the back plate is arranged on one side of the display part, and the back plate is located in the flat display area and the curved display area; the bending protection layer is arranged on the side of the back plate away from the display part and is at least located in corner curved sub-areas; the material of the bending protection layer comprises a plastic metal material.

Description

Display panel and display device Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the change of people's aesthetic level and the development of mobile terminal products, people are gradually pursuing the appearance of mobile phone terminals with rounded curves. Many curved screen terminals have appeared in the market. The current multi-curved screens are all curved on two sides, that is, hyperbolic. There are many hyperbolic products and the technical research is becoming more and more perfect. However, the quad-curved screen has gradually become a market hotspot due to its advantages such as more beautiful curves, differentiated appearance and no borders on all four sides. The quad-curved screen is also one of the inevitable trends in the development of mobile phone terminals.

[0003] In a four-curved screen, wrinkles and bubbles are prone to occur in the curved area, especially in the corner area. SUMMARY OF THE INVENTION

[0004] Embodiments of the present application provide a display panel and a display device, which can improve the phenomenon of wrinkles and bubbles generated in a curved display area of ​​the display panel.

[0005] An embodiment of the present application provides a display panel, comprising a flat display area and a curved display area adjacent to the flat display area, wherein the curved display area comprises a plurality of side curved sub-areas located around the flat display area and a corner curved sub-area located between two adjacent side curved sub-areas; wherein the display panel further comprises:

[0006] A panel body, comprising a display portion, wherein the display portion is located in the flat display area and the curved display area;

[0007] a back panel, provided on one side of the display portion, the back panel being located within the flat display area and the curved display area;

[0008] a curved protection layer, disposed on a side of the back plate away from the display portion and at least located within the corner curved surface sub-region;

[0009] Wherein, the material of the bending protection layer includes plastic metal material.

[0010] In accordance with the above-mentioned object of the present application, an embodiment of the present application further provides a display device, comprising a display panel, the display panel comprising a flat display area and a curved display area adjacent to the flat display area, wherein the curved display area comprises a plurality of side curved sub-areas located around the flat display area and a corner curved sub-area located between two adjacent side curved sub-areas; wherein the display panel further comprises:

[0011] A panel body, comprising a display portion, wherein the display portion is located in the flat display area and the curved display area;

[0012] a back panel, provided on one side of the display portion, the back panel being located within the flat display area and the curved display area;

[0013] a curved protection layer, disposed on a side of the back plate away from the display portion and at least located within the corner curved surface sub-region;

[0014] Wherein, the material of the bending protection layer includes plastic metal material. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a schematic diagram of a planar structure of a display panel provided in an embodiment of the present application;

[0016] FIG2 is a schematic diagram of a cross-sectional structure of a display panel provided in an embodiment of the present application;

[0017] FIG3 is a schematic diagram of another cross-sectional structure of a display panel provided in an embodiment of the present application;

[0018] FIG4 is a schematic diagram of another cross-sectional structure of a display panel provided in an embodiment of the present application;

[0019] FIG5 is a schematic diagram of another cross-sectional structure of a display panel provided in an embodiment of the present application;

[0020] FIG6 is a schematic structural diagram of a curved protective layer provided in an embodiment of the present application;

[0021] FIG7 is a schematic structural diagram of a display panel bending device provided in an embodiment of the present application;

[0022] FIG8 is a schematic structural diagram of a curved display module provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0024] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0025] In the related art, during the process of forming a four-curved display panel, the portion of the display panel located in the curved area needs to be bent and fit with the curved surface of the cover plate. However, the adhesive layer between the display panel and the cover plate is usually not sticky enough to overcome the rebound force of the display panel, causing the display panel and the cover plate to separate, and then rebound bubbles appear in the curved area of ​​the display panel, especially in the corner area of ​​the curve.

[0026] Please refer to Figures 1 and 2. An embodiment of the present application provides a display panel, which includes a flat display area 101 and a curved display area 102 adjacent to the flat display area 101, and the curved display area 102 includes a plurality of side curved sub-areas 1021 arranged around the flat display area 101 and a corner curved sub-area 1022 connected between adjacent side curved sub-areas 1021.

[0027] The display panel also includes a panel body 10, a back panel 20, and a curved protective layer 30; wherein, the panel body 10 includes a display portion 11, the display portion 11 is located in a flat display area 101 and a curved display area 102, the back panel 20 is arranged on one side of the display portion 11, and the back panel 20 is located in the flat display area 101 and the curved display area 102; the curved protective layer 30 is arranged on a side of the back panel 20 away from the display portion 11 and is at least located in the corner curved sub-area 1022.

[0028] Furthermore, the material of the bending protection layer 30 includes a plastic metal material.

[0029] During the implementation and application process, the embodiment of the present application sets a curved protective layer 30 on the back side of the display panel, and the material of the curved protective layer 30 is a plastic metal material, thereby at least enhancing the supporting effect on the corner curved sub-area 1022 of the display part 11, so as to improve the restraint of the display part 11 in the corner curved sub-area 1022, thereby reducing the probability of rebound bubbles generated by the display part 11 due to the formation of the curve, so as to improve the phenomenon of wrinkles and bubbles in the curved display area 102 of the display panel.

[0030] In one embodiment of the present application, the curved protection layer is also located in the side curved surface sub-region.

[0031] In one embodiment of the present application, the curved protection layer is also located in the flat display area.

[0032] In one embodiment of the present application, a groove is provided on a side of the back plate away from the display portion, and the curved protection layer is provided in the groove.

[0033] In one embodiment of the present application, the display panel further includes a composite functional layer, and the bending protection layer is disposed between the back panel and the composite functional layer.

[0034] In one embodiment of the present application, the composite functional layer includes a metal layer arranged on a side of the bending protective layer away from the back plate, and the plasticity of the bending protective layer is greater than the plasticity of the metal layer.

[0035] In one embodiment of the present application, the material of the bending protection layer and the material of the metal layer both include at least one of copper and aluminum.

[0036] In one embodiment of the present application, the composite functional layer also includes a buffer layer arranged between the metal layer and the bending protection layer, and a first adhesive layer arranged between the buffer layer and the bending protection layer, and the thickness of the metal layer is less than or equal to the thickness of the first adhesive layer.

[0037] In one embodiment of the present application, the panel body also includes a binding portion located on the side of the composite functional layer away from the curved protective layer, and the display panel also includes a supporting backplane arranged between the binding portion and the composite functional layer, and the thickness of the supporting backplane is greater than the thickness of the backplane.

[0038] In one embodiment of the present application, the display panel further comprises a cover plate disposed on a side of the display portion away from the back plate, wherein a portion of the cover plate within the curved display area is curved toward the display portion, and the display portion, the back plate, and the curved protective layer are in contact with the cover plate at least within the corner curved sub-area.

[0039] The orthographic projection of the curved protective layer on the cover plate is located within the orthographic projection of the back plate on the cover plate, and the orthographic projection boundary of the curved protective layer on the cover plate is spaced apart from the orthographic projection boundary of the back plate on the cover plate.

[0040] In one embodiment of the present application, the display panel further includes a bonding adhesive layer disposed between the cover plate and the display portion, and the thickness of the bonding adhesive layer is less than 175 microns.

[0041] In one embodiment of the present application, the curved protection layer includes a supporting sublayer and an adhesive sublayer that are stacked, and the supporting sublayer is attached to a side of the backplane away from the display portion through the adhesive sublayer.

[0042] In one embodiment of the present application, the thickness of the bending protection layer is greater than or equal to 5 microns.

[0043] In one embodiment of the present application, when the compression amount of the display portion in the curved display area is less than or equal to 300 micrometers, the thickness of the curved protection layer is less than or equal to 10 micrometers;

[0044] When the compression amount of the display portion in the curved display area is greater than 300 microns and less than or equal to 500 microns, the thickness of the curved protection layer is greater than 10 microns and less than or equal to 20 microns;

[0045] The compression amount of the display portion in the curved display area is greater than 500 micrometers, and the thickness of the curved protection layer is greater than or equal to 15 micrometers and less than or equal to 30 micrometers.

[0046] Specifically, please continue to combine Figures 1 and 2. The display panel includes a flat display area 101 and a curved display area 102 adjacent to the flat display area 101, and the curved display area 102 includes a plurality of side curved sub-areas 1021 located around the flat display area 101 and a corner curved sub-area 1022 located between adjacent two side curved sub-areas 1021.

[0047] In one embodiment, the flat display area 101 may be rectangular, and the number of the side curved sub-areas 1021 may be four, and they are located around the flat display area 101, and the corner curved sub-areas 1022 are located at the four corners of the flat display area 101 and are connected between two adjacent side curved sub-areas 1021; it can be understood that the display panel is bent toward the side away from the light-emitting side in the curved display area 102 to form a four-curved display panel. Therefore, the four sides and four corners of the display panel are all curved to achieve a display effect with a narrower frame, and the embodiment of the present application is illustrated by taking the number of curves and bending directions of the above-mentioned display panel as an example, but is not limited to this; among them, the figure provided in the present application is only a structural schematic diagram of the display panel, and does not reflect the bending state of each film layer structure in the curved display area 102.

[0048] Please refer to Figures 1 and 2. In the embodiment of the present application, the display panel includes a panel body 10, and the panel body 10 includes a display part 11. The display panel also includes a polarizer 51 arranged on the light-emitting side of the display part 11, a bonding adhesive layer 53 and a cover plate 52 arranged on the side of the polarizer 51 away from the display part 11, a back plate 20 arranged on the side of the display part 11 away from the polarizer 51, and a composite functional layer 40 arranged on the side of the back plate 20 away from the display part 11; wherein, the display part 11, the back plate 20, the polarizer 51 and the cover plate 52 are all located in the flat display area 101 and the curved display area 102, and specifically can be located in the side curved sub-area 1021 and the corner curved sub-area 1022.

[0049] Among them, the cover plate 52 is bonded to the side of the polarizer 51 away from the display part 11 through the bonding adhesive layer 53, and the display panel also includes a shading layer 54 arranged at the edge of the cover plate 52, and the shading layer 54 can be black ink to achieve a shading effect; the cover plate 52 is a curved cover plate, and the surrounding sides of the cover plate 52 are all curved surfaces, and are arranged corresponding to the curved display area 102, and then after the polarizer 51, the display part 11 and the back plate 20 and other structures are bonded to the cover plate 52, a curved surface can be formed at the position of the curved display area 102 to achieve a narrow frame display effect; it can be understood that the illustrations provided in this application are only structural schematic diagrams of the display panel, and do not reflect the bending state of each film layer structure in the curved display area 102.

[0050] Furthermore, a polarizer 51 and a back panel 20 are respectively provided on both sides of the display portion 11. Since the polarizer 51 and the back panel 20 have good elasticity, during the process of curved surface bonding with the cover plate 52, the viscosity of the adhesive layer is not sufficient to overcome the rebound force, which will cause the polarizer 51, the display portion 11, and the back panel 20 to separate from the cover plate 52, thereby generating rebound bubbles.

[0051] Therefore, the display panel further includes a bending protection layer 30 disposed between the backplane 20 and the composite functional layer 40. The bending protection layer 30 is made of a plastic metal material. The bending protection layer 30 is located at least within the corner curved surface sub-region 1022. The display portion 11, the polarizer 51, the backplane 20, and the bending protection layer 30 are in contact with the cover plate 52 at least within the corner curved surface sub-region 1022. Since the plastic metal material has good plasticity, the bending protection layer 30 has a strong ability to resist bending deformation after forming a curved surface. This can restrain the polarizer 51, the display portion 11, and the backplane 20 located within the corner curved surface sub-region 1022, thereby reducing the probability of the display portion 11 separating from the cover plate 52 due to rebound force. This can also improve the phenomenon of rebound bubbles generated between the polarizer 51, the display portion 11, the backplane 20, and the cover plate 52, thereby improving the yield rate of the display panel.

[0052] It should be noted that in order to overcome the elastic force of the display part 11, the polarizer 51 and the back panel 20 in the related art, the thickness of the bonding adhesive layer 53 is usually increased, and is generally greater than or equal to 175 microns, resulting in the overall thickness of the display panel becoming larger, which is not conducive to the thinness of the display panel; while in the embodiment of the present application, by adding the bending protection layer 30, there is no need to increase the thickness of the bonding adhesive layer 53, so that the elastic force of the display part 11, the polarizer 51 and the back panel 20 can be overcome. Therefore, in the implementation of the present application, the thickness of the bonding adhesive layer 53 does not need to be increased, and the thickness of the bonding adhesive layer 53 is less than 175 microns, for example, it can be 150 microns.

[0053] In one embodiment, the composite functional layer 40 includes a first adhesive layer 41, a buffer layer 42, a second adhesive layer 43, and a metal layer 44, sequentially disposed on the side of the bending protection layer 30 away from the backplane 20. The first adhesive layer 41 is made of mesh adhesive (Embo), which has the effect of dissipating bubbles; the buffer layer 42 is made of foam, which can buffer stress; the second adhesive layer 43 can be PSA adhesive; and the metal layer 44 can be made of copper, aluminum alloy, stainless steel, etc., enabling the composite functional layer 40 to provide light shielding, heat dissipation, static discharge, signal shielding, and support.

[0054] Among them, the material of the bending protection layer 30 can include at least one of copper or aluminum, that is, the material of the bending protection layer 30 can be the same as the material of the metal layer 44, but the plasticity of the bending protection layer 30 is greater than the plasticity of the metal layer 44. For example, when the material of the metal layer 44 is rolled copper, it has better support, and the material of the bending protection layer 30 can be electrolytic copper, and the elastic modulus of the electrolytic copper is greater than or equal to 20GPa and less than or equal to 50GPa, and has higher plasticity.

[0055] In one embodiment of the present application, referring to FIG. 3 , the curved protection layer 30 may be disposed in the corner curved surface sub-region 1022 , and not in the side curved surface sub-region 1021 and the flat display region 101 .

[0056] Alternatively, the curved protection layer 30 may be disposed in the corner curved surface sub-region 1022 and the side curved surface sub-region 1021 , and not located in the flat display region 101 .

[0057] Among them, a groove is set on the side of the back panel 20 away from the display part 11, and the curved protective layer 30 can be set in the groove, and the thickness of the curved protective layer 30 is less than or equal to the depth of the groove, thereby forming a flat surface on the side of the back panel 20 away from the display part 11, which is more conducive to bonding with the composite functional layer 40.

[0058] In another embodiment of the present application, referring to FIG. 4 , the curved protection layer 30 may be disposed in the corner curved surface sub-region 1022 , and not in the side curved surface sub-region 1021 and the flat display region 101 .

[0059] Alternatively, the curved protection layer 30 may be disposed in the corner curved surface sub-region 1022 and the side curved surface sub-region 1021 , and not located in the flat display region 101 .

[0060] Among them, the side of the back panel 20 away from the display part 11 is a plane, and the curved protective layer 30 can be set on the side of the back panel 20 away from the display part 11. The buffer layer 42 can be adhered to the curved protective layer 30 through the first adhesive layer 41, and because the thickness of the buffer layer 42 is relatively large, the buffer layer 42 can fill the step difference caused by the setting of the curved protective layer 30 on the side of the back panel 20 away from the display part 11.

[0061] In another embodiment of the present application, referring to FIG. 2 , the curved protective layer 30 can be disposed in the corner curved sub-area 1022 , the side curved sub-area 1021 , and the flat display area 101 . That is, the curved protective layer 30 can support the display portion 11 in both the flat display area 101 and the curved display area 102 , and the curved protective layer 30 does not need to be disposed in specific areas, thereby reducing the difficulty of bonding and simplifying the process.

[0062] In the embodiment of the present application, since the curved protection layer 30 can provide better protection for the back side of the display portion 11 , the thickness of the composite functional layer 40 can be reduced to reduce the overall thickness of the display panel.

[0063] Among them, the thickness of the buffer layer 42 and the metal layer 44 can be thinned. For example, the thickness of the buffer layer 42 can be reduced from 120 microns to 100 microns, and the thickness of the metal layer 44 can be reduced from 50 microns to 30 microns. The sum of the reduced thicknesses of the buffer layer 42 and the metal layer 44 can be greater than the thickness of the curved protective layer 30, so that the overall thickness of the display panel is reduced.

[0064] It should be noted that, due to the strong supporting effect of the bending protection layer 30, the thickness of the metal layer 44 can be thinned, and the thickness of the metal layer 44 is less than or equal to the thickness of the first adhesive layer 41; wherein, the thickness of the first adhesive layer 41 can be greater than or equal to 30 microns and less than or equal to 40 microns.

[0065] Furthermore, due to the strong supporting effect of the curved protective layer 30, the thickness of the back panel 20 can also be reduced while ensuring that the back side of the display part 11 has sufficient support. For example, the thickness of the back panel 20 can be less than or equal to 88 microns. Specifically, the thickness of the back panel 20 can be reduced to 75 microns, 65 microns, 50 microns, or 25 microns.

[0066] Further, please refer to Figures 1, 2 and 5. In one embodiment, the panel main body 10 also includes a binding portion 12 located on the side of the composite functional layer 40 away from the bending protective layer 30, and a bending portion 13 connected between the display portion 11 and the binding portion 12, and one end of the bending portion 13 is connected to the display portion 11, and the other end of the bending portion 13 is bent toward the binding portion 12 and connected to the binding portion 12; and the display panel also includes a supporting backplane 21 arranged on the side of the binding portion 12 close to the composite functional layer 40, and a driving chip 61 and a flexible circuit board 62 connected to the binding portion 12; wherein the supporting backplane 21 supports the binding portion 12.

[0067] It should be noted that the back panel 20 and the supporting back panel 21 are made of the same material and can be formed together during the manufacturing process. However, in the embodiment of the present application, since a bending protection layer 30 is provided on one side of the back panel 20 and the bending protection layer 30 has a strong supporting effect, the thickness of the back panel 20 can be reduced; however, the thickness of the supporting back panel 21 cannot be reduced, otherwise the supporting back panel 21 will have insufficient stiffness and insufficient support for the binding part 12, which may easily cause the wiring on the binding part 12 to break. Therefore, in the embodiment of the present application, the thickness of the back panel 20 is less than the thickness of the supporting back panel 21.

[0068] In one embodiment, please refer to Figures 2 and 6, the curved protective layer 30 includes a stacked supporting sublayer 31 and an adhesive sublayer 32, and the adhesive sublayer 32 is located between the supporting sublayer 31 and the back panel 20. The supporting sublayer 31 can be attached to the side of the back panel 20 away from the display part 11 through the adhesive sublayer 32.

[0069] In the embodiment of the present application, in order to ensure the support effect and anti-deformation ability of the bending protection layer 30, the thickness of the bending protection layer 30 needs to be greater than or equal to 5 microns.

[0070] It should be noted that, after verification of the embodiments of the present application, it was found that as the compression of the display portion 11 within the curved display area 102 increases, the rebound force increases, and the thickness of the curved protection layer 30 also needs to be increased to ensure the corresponding support and deformation resistance. The compression amount is the size of the display portion 11 before bending and bonding minus the size after bending and bonding. This size refers to the circumference of the display portion 11 within the curved display area 102, or the circumference of the display portion 11 within the corner curved sub-area 1022.

[0071] In one embodiment, when the compression amount of the display portion 11 in the curved display area 102 is greater than or equal to 200 microns and less than or equal to 300 microns, the thickness of the curved protection layer 30 is less than or equal to 10 microns; when the compression amount of the display portion 11 in the curved display area 102 is greater than 300 microns and less than or equal to 500 microns, the thickness of the curved protection layer 30 is greater than 10 microns and less than or equal to 20 microns; when the compression amount of the display portion 11 in the curved display area 102 is greater than 500 microns, the thickness of the curved protection layer 30 is greater than or equal to 15 microns and less than or equal to 3 0 microns; as mentioned above, the embodiment of the present application adjusts the thickness of the curved protective layer 30 according to the change in the curvature of the side and corner of the display panel, that is, according to the change in the compression amount of the display portion 11 in the curved display area 102, so that the support and anti-deformation capabilities of the curved protective layer 30 match the rebound force of the display portion 11. On the basis of improving the phenomenon of bonding bubbles between the display portion 11 and the cover plate 52, it avoids the curved protective layer 30 being too thick, which leads to a large stiffness of the curved protective layer 30, resulting in increased difficulty in bonding between the display portion 11 and the cover plate 52 in the curved display area 102.

[0072] In one embodiment, the orthographic projection of the curved protective layer 30 on the cover plate 52 is located within the orthographic projection of the back plate 20 on the cover plate 52, and the orthographic projection boundary of the curved protective layer 30 on the cover plate 52 is spaced apart from the orthographic projection boundary of the back plate 20 on the cover plate 52, that is, the edge of the curved protective layer 30 is retracted relative to the edge of the back plate 20, thereby reducing the probability that the edge of the curved protective layer 30 exceeds the edge of the display part 11 due to the influence of the bonding tolerance, thereby improving the bonding yield of the display panel.

[0073] The distance between the orthographic projection boundary of the curved protection layer 30 on the cover plate 52 and the orthographic projection boundary of the back plate 20 on the cover plate 52 may be greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

[0074] Continuing from the above, the embodiment of the present application provides a curved protective layer 30 on the back side of the display panel, and the material of the curved protective layer 30 is a plastic metal material, thereby at least enhancing the supporting effect on the corner curved sub-area 1022 of the display part 11, so as to improve the restraint of the display part 11 in the corner curved sub-area 1022, thereby reducing the probability of rebound bubbles generated by the display part 11 due to the formation of the curved surface, so as to improve the phenomenon of wrinkles and bubbles in the curved display area 102 of the display panel.

[0075] In addition, an embodiment of the present application provides a method for manufacturing the display panel described in the above embodiment. Referring to FIG. 1 , FIG. 2 , FIG. 7 , and FIG. 8 , the method for manufacturing the display panel includes:

[0076] An intermediate module is provided, which includes a panel body 10, a back plate 20, and a curved protective layer 30 that are bonded together. It should be noted that the display portion 11 in the panel body 10 is bonded to the back plate 20 and the curved protective layer 30.

[0077] In one embodiment, the intermediate module further includes a polarizer 51 and a bonding adhesive layer 53 disposed on a side of the panel body 10 away from the back plate 20 .

[0078] It should be noted that the formation process of the intermediate module can be to first cut and obtain the formed backplane 20, then bond the motherboard of the panel body 10 and the backplane 20 together and cut and form them, and then bond them with the cut and formed curved protective layer 30 to obtain the intermediate module.

[0079] Alternatively, you can first obtain a cut-shaped back panel 20 and a cut-shaped curved protective layer 30, and then bond the back panel 20 and the curved protective layer 30 together, and then bond the motherboard of the panel body 10 to the back panel 20 and the curved protective layer 30, and obtain an intermediate module after cutting.

[0080] Alternatively, the motherboard of the back panel 20 and the motherboard of the curved protective layer 30 are first bonded together, and then cut to obtain the bonded back panel 20 and curved protective layer 30, and then the back panel 20, the curved protective layer 30 and the motherboard of the panel body 10 are bonded together, and then cut to obtain the intermediate module.

[0081] Next, the intermediate module and the cover plate 52 are bonded together by the bending device 71 shown in Figure 7 to obtain the display module shown in Figure 8. At this time, since the bending protective layer 30 is located on the side of the back plate 20 away from the display part 11, it can restrain and resist deformation of the display part 11, the polarizer 51 and the back plate 20, thereby improving the phenomenon of rebound bubbles appearing during the bonding process of the display module.

[0082] It should be noted that since a bending protection layer 30 is added to the display panel provided in the embodiment of the present application, and the bending protection layer 30 is made of plastic metal material, during the bending bonding process, it is necessary to increase the bonding pressure in the corresponding curved display area 102, and it must be greater than the bonding pressure in the corresponding flat display area 101.

[0083] In summary, the embodiment of the present application adds a bending protection layer 30 between the back panel 20 and the composite functional layer 40, and the material of the bending protection layer 30 includes a plastic metal material. The bending protection layer 30 is located at least within the corner curved surface sub-region 1022. Since the plastic metal material has good plasticity, the bending protection layer 30 has a strong ability to resist bending deformation after forming a curved surface. This can at least restrain the polarizer 51, the display unit 11, and the back panel 20 located within the corner curved surface sub-region 1022, thereby reducing the probability of the display unit 11 separating from the cover panel 52 due to rebound force. This can also improve the phenomenon of rebound bubbles generated between the polarizer 51, the display unit 11, the back panel 20, and the cover panel 52, thereby improving the yield rate of the display panel.

[0084] Furthermore, an embodiment of the present application also provides a display device, which includes the display panel described in the above embodiment.

[0085] It can be understood that, since the display device has the same display panel as that in the above embodiment, the display device has the same beneficial effects as the above display panel, which will not be described in detail here.

[0086] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0087] The above is a detailed introduction to a display panel and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, the display panel comprising a flat display area and a curved display area adjacent to the flat display area, and the curved display area comprising a plurality of side curved sub-areas located on the peripheral side of the flat display area and corner curved sub-areas located between two adjacent side curved sub-areas; Wherein, The display panel further comprises: A panel body, comprising a display portion, the display portion being located within the flat display area and the curved display area; A backplane, disposed on one side of the display portion, the backplane being located within the flat display area and the curved display area; A bending protection layer, disposed on the side of the backplane away from the display portion and at least located within the corner curved sub-areas; Wherein, the material of the bending protection layer comprises a plastic metal material.

2. The display panel according to claim 1, Wherein, The bending protection layer is further located within the side curved sub-areas.

3. The display panel according to claim 1, Wherein, The bending protection layer is further located within the flat display area.

4. The display panel according to claim 1, Wherein, A groove is provided on the side of the backplane away from the display portion, and the bending protection layer is disposed within the groove.

5. The display panel according to claim 1, Wherein, The display panel further comprises a composite functional layer, and the bending protection layer is disposed between the backplane and the composite functional layer.

6. The display panel according to claim 5, Wherein, The composite functional layer comprises a metal layer disposed on the side of the bending protection layer away from the backplane, and the plasticity of the bending protection layer is greater than that of the metal layer.

7. The display panel according to claim 6, Wherein, The materials of the bending protection layer and the metal layer both comprise at least one of copper and aluminum.

8. The display panel according to claim 6, Wherein, The composite functional layer further comprises a buffer layer disposed between the metal layer and the bending protection layer, and a first adhesive layer disposed between the buffer layer and the bending protection layer, and the thickness of the metal layer is less than or equal to the thickness of the first adhesive layer.

9. The display panel according to claim 5, Wherein, The panel body further comprises a bonding portion located on the side of the composite functional layer away from the bending protection layer, the display panel further comprises a support backplane disposed between the bonding portion and the composite functional layer, and the thickness of the support backplane is greater than the thickness of the backplane.

10. The display panel according to claim 1, Wherein, The display panel further comprises a cover plate disposed on the side of the display portion away from the backplane, a portion of the cover plate within the curved display area is bent towards the display portion side, and the display portion, the backplane, and the bending protection layer are at least in contact with the cover plate within the corner curved sub-areas; Wherein, the orthographic projection of the bending protection layer on the cover plate is located within the orthographic projection of the backplane on the cover plate, and the boundary of the orthographic projection of the bending protection layer on the cover plate is spaced apart from the boundary of the orthographic projection of the backplane on the cover plate.

11. The display panel according to claim 10, Wherein, The display panel further includes an adhesive layer disposed between the cover plate and the display portion, and the thickness of the adhesive layer is less than 175 micrometers.

12. The display panel according to claim 1, wherein, the bending protection layer includes a support sub-layer and an adhesion sub-layer stacked, and the support sub-layer is attached to a surface of the backplane away from the display portion through the adhesion sub-layer.

13. The display panel according to claim 1, wherein, the thickness of the bending protection layer is greater than or equal to 5 micrometers.

14. The display panel according to claim 13, wherein, when the compression amount of the display portion in the curved display area is less than or equal to 300 micrometers, the thickness of the bending protection layer is less than or equal to 10 micrometers; when the compression amount of the display portion in the curved display area is greater than 300 micrometers and less than or equal to 500 micrometers, the thickness of the bending protection layer is greater than 10 micrometers and less than or equal to 20 micrometers; when the compression amount of the display portion in the curved display area is greater than 500 micrometers, the thickness of the bending protection layer is greater than or equal to 15 micrometers and less than or equal to 30 micrometers.

15. A display device, the display device includes a display panel, the display panel includes a flat display area and a curved display area adjacent to the flat display area, and the curved display area includes a plurality of side curved sub-areas located on the periphery of the flat display area and a corner curved sub-area located between two adjacent side curved sub-areas; wherein, the display panel further includes: a panel body including a display portion, and the display portion is located in the flat display area and the curved display area; a backplane disposed on one side of the display portion, and the backplane is located in the flat display area and the curved display area; a bending protection layer disposed on a side of the backplane away from the display portion and at least located in the corner curved sub-area; wherein, the material of the bending protection layer includes a plastic metal material.

16. The display device according to claim 15, wherein, the bending protection layer is further located in the side curved sub-areas.

17. The display device according to claim 15, wherein, the bending protection layer is further located in the flat display area.

18. The display device according to claim 15, wherein, a groove is provided on a side of the backplane away from the display portion, and the bending protection layer is disposed in the groove.

19. The display device according to claim 15, wherein, the display panel further includes a composite functional layer, and the bending protection layer is disposed between the backplane and the composite functional layer.

20. The display device according to claim 19, wherein, the composite functional layer includes a metal layer disposed on a side of the bending protection layer away from the backplane, and the plasticity of the bending protection layer is greater than that of the metal layer.

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