Display module and display device

Abstract

The present application relates to a display module and a display device, comprising a bending zone and a non-bending zone arranged side by side along a first direction. The display module comprises: a flexible display panel and a buffer layer. The flexible display panel comprises a backlight surface and a light-emitting surface relative to each other. The buffer layer is arranged on one side of the backlight surface of the flexible display panel, the buffer layer comprises a main body and a plurality of cavity structures, the plurality of cavity structures are arranged at intervals along the first direction according to a preset rule, the buffer layer has a first equivalent thickness corresponding to the bending zone, the buffer layer has a second equivalent thickness corresponding to the non-bending zone, the first equivalent thickness is less than the second equivalent thickness, and the first direction intersects with the thickness direction of the buffer layer. The embodiment of the present application can better release the bending resistance of the bending zone of the buffer layer, and the bending zone of the buffer layer has a stronger tensile strength, thereby reducing the tensile deformation of the buffer layer and improving the front buffering capacity of the display module.

Description

Technical Field

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

[0002] With the development of display technology, consumers have more and more demands for display devices. For example, current display devices need to be portable, personalized, and have large screens. In order to meet these characteristics, flexible folding display devices have come into being.

[0003] However, in the field of flexible folding display devices, there are still many important problems to be overcome, such as damage on the display screen before and after bending, or creases and dents in the folding area of ​​the display screen. Summary of the invention

[0004] The display module and the display device provided in the embodiments of the present application can avoid the phenomenon of fracture in the bending area and increase the bending life of the bending area.

[0005] On the one hand, according to an embodiment of the present application, a display module is proposed, comprising a bending area and a non-bending area arranged side by side along a first direction. The display module comprises: a flexible display panel, comprising a backlight surface and a light-emitting surface relative to each other. A buffer layer is arranged on one side of the backlight surface of the flexible display panel, the buffer layer comprises a main body and a plurality of cavity structures, the plurality of cavity structures are arranged at intervals along the first direction according to a preset rule, the buffer layer has a first equivalent thickness corresponding to the bending area, the buffer layer has a second equivalent thickness corresponding to the non-bending area, the first equivalent thickness is less than the second equivalent thickness, and the first direction intersects with the thickness direction of the buffer layer.

[0006] On the other hand, an embodiment of the present application further provides a display device, comprising the display module as described above.

[0007] According to the display module and display device provided by the present application, the cavity structure is regularly arranged in the bending area of ​​the buffer layer, so that the bending resistance of the bending area of ​​the buffer layer can be better released. The first equivalent thickness of the bending area of ​​the buffer layer is set to be smaller than the second equivalent thickness of the non-bending area of ​​the buffer layer, so that the bending area of ​​the buffer layer can have a stronger tensile strength, thereby reducing the tensile deformation of the buffer layer and improving the front buffering capacity of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0009] Figure 1 A schematic diagram of the structure of a display module provided in some embodiments of the present application;

[0010] Figure 2 for Figure 1A schematic diagram of a cross-sectional structure of AA;

[0011] Figure 3 for Figure 2 A schematic diagram of a cross-sectional structure of the BB;

[0012] Figure 4 for Figure 2 Another cross-sectional structure diagram of the middle BB;

[0013] Figure 5 for Figure 1 Another cross-sectional structure diagram of AA in the figure;

[0014] Figure 6 for Figure 1 Another cross-sectional structure diagram of AA.

[0015] Marking Description:

[0016] 100. display module; 1. non-bending area; 2. bending area;

[0017] 10. Flexible display panel; S1, backlight surface; S2, light emitting surface;

[0018] 20, buffer layer; 20a, center line; 20b, boundary line; 21, main body; 21a, first sub-area; 21b, second sub-area; 21c, third sub-area; 22, cavity structure; E1, first straight line; E2, second straight line; 23, support part;

[0019] X, first direction; Y, thickness direction; Z, second direction.

[0020] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0021] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. 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 terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0023] With the gradual improvement of organic light emitting diode (OLED) display technology, active-matrix organic light-emitting diode (AMOLED) flexible display screens have gradually become mainstream. At the same time, flexible folding screens are also becoming a new hot spot in the market.

[0024] The current flexible folding screen usually adopts a combination of a flexible display panel and a support layer. When the flexible folding screen is unfolded, the support layer supports the bending area of ​​the flexible folding screen. When the flexible folding screen is bent, the support layer protects the bending area of ​​the flexible folding screen.

[0025] However, with the frequent use of flexible folding screens, the bending area of ​​the support layer will cause cracks in the support layer due to bending resistance problems, thereby reducing the service life of the flexible folding screen.

[0026] In order to better understand the present application, on the one hand, the following Figures 1 to 6 A detailed description is given according to the embodiments of the present application.

[0027] Figure 1 A schematic diagram of the structure of a display module provided in some embodiments of the present application. Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA type. Figure 3 for Figure 2 A schematic diagram of a cross-sectional structure of BB. Figure 4 for Figure 2 Another cross-sectional structure diagram of the BB.

[0028] like Figure 1 and Figure 2As shown, a display module 100 provided in an embodiment of the present application includes a bending area 2 and a non-bending area 1 arranged side by side along a first direction X. The display module 100 includes: a flexible display panel and a buffer layer 20. The flexible display panel includes a backlight surface and a light-emitting surface relative to each other. The buffer layer 20 is arranged on one side of the backlight surface of the flexible display panel. The buffer layer 20 includes a main body 21 and a plurality of cavity structures 22. The plurality of cavity structures 22 are arranged at intervals along the first direction X according to a preset rule. The buffer layer 20 has a first equivalent thickness corresponding to the bending area 2, and the buffer layer 20 has a second equivalent thickness corresponding to the non-bending area 1, the first equivalent thickness is less than the second equivalent thickness, and the first direction X intersects with the thickness direction Y of the buffer layer 20.

[0029] In some examples, the display module 100 is used to display a picture. For example, the display module 100 includes a flexible display panel, and the flexible display panel can be an OLED display panel. The flexible OLED display panel includes a flexible substrate and an OLED device disposed on the flexible substrate, and the material of the flexible substrate is, for example, polyimide (PI). The OLED device can achieve self-luminescence, and a backlight source does not need to be provided in a display device having an OLED display panel. When the substrate material of the OLED display panel is a flexible material, the above-mentioned OLED display panel can be bent.

[0030] In some optional examples, both the bending area 2 and the non-bending area 1 of the display module 100 can display images normally. In other optional examples, the non-bending area 1 of the display module 100 is used to display images normally, and the bending area 2 of the display module 100 is a non-display area.

[0031] In some optional examples, the bending state of the display module 100 includes an inner folding state and an outer folding state. The outer folding state means that the display side of the display module 100 is on the outside after the display module 100 is bent; on the contrary, the inner folding state means that the display side of the display module 100 is on the inside after the display module 100 is bent, so as to effectively protect the display side of the flexible display module 100 from external impact when in the bent state, thereby reducing the risk of failure of the display module 100. The display module 100 provided in some optional embodiments of the present application can achieve 360-degree folding.

[0032] The buffer layer 20 is disposed on the backlight surface of the flexible display panel to ensure the reliability and support of the display module 100 when being bent. The main body 21 of the buffer portion can be attached to the backlight surface of the flexible display panel by adhesion, electrostatic adsorption, etc.

[0033] Optionally, the cavity structure 22 inside the buffer layer 20 can be a plurality of independent bubble structures, or a plurality of independent tubular structures. The projection shape of the bubble structure on the light-emitting surface includes a circle, a cone, and an ellipse. The tubular structure can be set throughout the entire buffer layer 20, or the tubular structure can be one or more non-penetrating tubular structures inside the buffer layer 20.

[0034] Multiple cavity structures 22 are regularly arranged inside the buffer layer 20. Optionally, the arrangement rules of the multiple cavity structures 22 include: matrix, uniform density, uniform size, gradually increasing density, gradually decreasing density, gradually increasing density first and then gradually decreasing density, gradually decreasing density first and then gradually increasing density, gradually increasing size, gradually decreasing size, gradually increasing size first and then gradually decreasing size, gradually decreasing size first and then gradually increasing size. It can be understood that the arrangement rule of the multiple cavity structures 22 in the non-bending zone 1 can follow the arrangement rule of the bending zone 2; the arrangement rule of the multiple cavity structures 22 in the non-bending zone 1 can also use an arrangement rule different from the arrangement rule of the bending zone 2; the multiple cavity structures 22 are arranged in the bending zone 2 according to the arrangement rule, and the cavity structure 22 is set in a part of the non-bending zone 1, and even the cavity structure 22 can be not set in the non-bending zone 1.

[0035] When the plurality of cavity structures 22 are arranged regularly, they are arranged along the first direction X. Optionally, the first direction X intersects with the thickness of the buffer layer 20 at a predetermined angle, or the first direction X is perpendicular to the thickness of the buffer layer 20 .

[0036] The first equivalent thickness refers to the sum of the actual thickness of the buffer layer 20 in the bending area 2 per unit volume, excluding the cavity structure 22. Similarly, the second equivalent thickness refers to the sum of the actual thickness of the buffer layer 20 in the non-bending area 1 per unit volume, excluding the cavity structure 22.

[0037] According to the display module 100 and the display device provided by the present application, the cavity structure 22 is regularly arranged in the bending area 2 of the buffer layer 20, so that the bending resistance of the bending area 2 of the buffer layer 20 can be better released. The first equivalent thickness of the bending area 2 of the buffer layer 20 is set to be smaller than the second equivalent thickness of the non-bending area 1 of the buffer layer 20, so that the bending area 2 of the buffer layer 20 can have a stronger tensile strength, thereby reducing the tensile deformation of the buffer layer 20 and improving the front buffering capacity of the display module 100.

[0038] See also Figure 1 In some optional embodiments of the present application, the number of the non-bending areas 1 is two, and the two non-bending areas 1 are arranged on both sides of the bending area 2 in the first direction X.

[0039] A bending area 2 is arranged between two non-bending areas 1, and one bending area 2 is arranged opposite to the other bending area 2 as the bending area 2 bends, so that the display module 100 has a larger display screen and is easy to store and carry.

[0040] See also Figure 1 and Figure 2 In some optional embodiments of the present application, the bending zone 2 includes a center line 20a and a boundary line 20b connected to the non-bending zone 1, and the inner diameter size of the cavity structure 22 is arranged in a gradually decreasing pattern from the center line 20a to the boundary line 20b.

[0041] In some optional examples, the bending zone 2 is bent with the center line 20a as the axis. In some optional examples, the bending zone 2 is bent with a preset axis between the center line 20a and the boundary line 20b.

[0042] Optionally, there are two boundary lines 20b between the bending area 2 and the non-bending area 1, and the two boundary lines 20b are located on both sides of the bending area 2 along the first direction X. It can be understood that the center line 20a and the boundary line 20b are boundaries defined in the bending area 2, and are not actual lines on the bending area 2, nor are they actual lines that can be detected by human eyes or instruments.

[0043] In this embodiment, since the bending zone 2 of the buffer layer 20 is bent with the center line 20a as the axis, the buffer layer 20 that is closer to the center line 20a is subjected to greater bending stress, and the bending stress to the buffer layer 20 that is farther away from the center line 20a and closer to the boundary line 20b will gradually decrease. The hollow structure 22 in the bending zone 2 of the buffer layer 20 is set to have a larger inner diameter size of the hollow structure 22 that is closer to the center line 20a, and a smaller inner diameter size of the hollow structure 22 that is closer to the boundary line 20b. While meeting the bending stress release performance requirements of the buffer layer 20 in the area near the center line 20a, it can also meet the bending stress release performance requirements of other areas in the bending zone 2 of the buffer layer 20, and reduce the possibility of excessive bending stress release performance of the buffer layer 20.

[0044] See also Figures 2 to 4 In some optional embodiments of the present application, the non-bending area 1 includes an edge away from the boundary line 20b along the first direction X, and the inner diameter size of the cavity structure 22 is arranged in a gradually decreasing pattern from the boundary line 20b to the edge, or the inner diameter size of the cavity structure 22 is equal.

[0045] During the bending or unfolding process of the display module 100, most or even all of the bending stress is borne by the bending zone 2, and the bending stress borne by the non-bending zone 1 can be ignored. The bending stress release performance requirement required by the non-bending zone 1 of the buffer layer 20 is much smaller than the bending stress release performance requirement required by the bending zone 2 of the buffer layer 20.

[0046] In this embodiment, the cavity structure 22 in the non-bending area 1 of the buffer layer 20 is set so that the inner diameter of the cavity structure 22 closer to the boundary line 20b is larger, thereby increasing the bending stress release performance of this area. The inner diameter of the cavity structure 22 closer to the edge of the non-bending area 1 is smaller, thereby gradually increasing the support force from the center line 20a of the bending area 2 to the direction of the boundary line 20b. Alternatively, the cavity structure 22 with the same inner diameter size is set in the non-bending area 1 of the buffer layer 20, so that the non-bending area 1 of the buffer layer 20 has a uniform support force.

[0047] Please continue reading Figures 2 to 4 In some optional embodiments of the present application, the maximum inner diameter of the cavity structure 22 in the non-bending zone 1 is less than or equal to the minimum inner diameter of the cavity structure 22 in the bending zone 2. That is, the inner diameter of any cavity structure 22 in the non-bending zone 1 does not exceed the minimum inner diameter of the cavity structure 22 in the bending zone 2.

[0048] In this embodiment, the non-bending area 1 of the flexible display panel is a commonly used area, which is usually pressed and used more times by users. The inner diameter size of the cavity structure 22 is set to be smaller than or equal to the inner diameter size of the cavity structure 22 of the non-bending area 1 of the buffer layer 20, so that the non-bending area 1 of the buffer layer 20 can provide sufficient support for the flexible display panel, further improving the life of the display module 100. And when the bending area 2 is pressed from the front, the bending area 2 needs a certain rebound force. The larger the inner diameter size of the cavity structure 22 of the bending area 2, the greater the rebound force that can be provided, reducing the possibility of the screen body being dented due to front pressing.

[0049] Please continue reading Figures 2 to 4 In some optional embodiments of the present application, the bending zone 2 includes a center line 20a and a boundary line 20b connected to the non-bending zone 1, and the distance between two adjacent cavity structures 22 gradually increases from the center line 20a to the boundary line 20b.

[0050] During the bending or unfolding process of the display module 100, the closer the bending area 2 of the buffer portion is to the center line 20a, the greater the tensile force the buffer portion is subjected to, and the closer the area is to the boundary line 20b, the smaller the tensile force the buffer portion is subjected to. The distance between two adjacent cavity structures 22 in the bending area 2 gradually increases from the center line 20a to the boundary line 20b. Therefore, the size of the main body 21 between the two adjacent cavity structures 22 near the center line 20a is small, and the tensile force on this part of the main body 21 can make the tensile deformation of this part of the main body 21 much smaller than the tensile deformation of the main body 21 between the two adjacent cavity structures 22 near the boundary line 20b, thereby improving the tensile deformation of the bending area 2 of the buffer layer 20 along the first direction X, and further reducing the problem of product breakage.

[0051] Please continue reading Figures 2 to 4 In some optional embodiments of the present application, the non-bending area 1 includes an edge away from the boundary line 20b along the first direction X, and the distance between two adjacent cavity structures 22 gradually increases from the boundary line 20b to the edge, or the distance between two adjacent cavity structures 22 is equal.

[0052] During the bending or unfolding process of the display module 100, most or even all of the tensile force is borne by the bending area 2, and the tensile force borne by the non-bending area 1 can be ignored. The tensile strength requirement required by the non-bending area 1 of the buffer layer 20 is much smaller than the tensile strength requirement required by the bending area 2 of the buffer layer 20.

[0053] In this embodiment, the cavity structures 22 in the non-bending region 1 of the buffer layer 20 are arranged such that the distance between two adjacent cavity structures 22 is smaller as they are closer to the boundary line 20b, thereby increasing the tensile strength of this region. The distance between two adjacent cavity structures 22 closer to the edge of the non-bending region 1 is larger, thereby gradually increasing the support force from the center line 20a of the bending region 2 to the boundary line 20b. Alternatively, the distance between any two adjacent cavity structures 22 in the non-bending region 1 of the buffer layer 20 is arranged to be equal, so that the non-bending region 1 of the buffer layer 20 has a uniform support force.

[0054] Please continue reading Figures 2 to 4 In some optional embodiments of the present application, the minimum spacing between two adjacent cavity structures 22 in the non-bending zone 1 is greater than or equal to the maximum spacing between two adjacent cavity structures 22 in the bending zone 2.

[0055] In this embodiment, the bending area 2 of the flexible display panel plays a very important role in the process of bending or unfolding the display module 100. The bending stress and tensile stress of the bending area 2 of the flexible display panel far exceed the bending stress and tensile stress of the non-bending area 1 of the flexible display panel. The spacing between two adjacent cavity structures 22 is set to be greater than or equal to the maximum spacing between two adjacent cavity structures 22 in the non-bending area 1. The non-bending area 1 of the buffer layer 20 can provide sufficient support for the flexible display panel, further improving the life of the display module 100.

[0056] Please continue reading Figures 2 to 4 In some optional embodiments of the present application, a plurality of cavity structures 22 are arranged to penetrate the buffer layer 20 in the second direction Z. That is, the cavity structure 22 is a tubular structure that penetrates the entire buffer layer 20, which simplifies the manufacturing process of the buffer layer 20 and reduces the production cost of the buffer layer 20.

[0057] In some optional embodiments of the present application, a plurality of cavity structures 22 are spaced apart in the second direction Z, and the first direction X intersects the second direction Z. Optionally, the cavity structure 22 may be a plurality of independent bubble structures, or the cavity structure 22 may be a plurality of independent tubular structures, and the plurality of tubular structures may be spaced apart along the second direction Z. That is, the orthographic projection shape of the cavity structure 22 on the light emitting surface is circular, conical, trapezoidal, rectangular, or square.

[0058] It can be understood that the cavity structure 22 disposed throughout the buffer layer 20 and the plurality of cavity structures 22 disposed at intervals along the second direction Z can be disposed in the same buffer layer 20 .

[0059] Figure 5 for Figure 1 Another cross-sectional structure diagram of AA. Figure 6 for Figure 1 Another cross-sectional structure diagram of AA.

[0060] See also Figure 5 In some optional embodiments of the present application, the main body 21 includes a first sub-area 21a, a second sub-area 21b and a third sub-area 21c distributed successively along the thickness direction Y, and at least one of the first sub-area 21a, the second sub-area 21b and the third sub-area 21c includes a plurality of cavity structures 22 arranged at intervals along the first direction X according to a preset regular pattern.

[0061] In some examples, the body portion 21 is divided into a first sub-region 21a, a second sub-region 21b, and a third sub-region 21c along the thickness direction Y. In other examples, the body portion 21 can be divided into a first sub-region 21a and a second sub-region 21b along the thickness direction Y. In still other examples, the body portion 21 can be divided into a first sub-region 21a, a second sub-region 21b, a third sub-region 21c, a fourth sub-region ... and an Nth sub-region along the thickness direction Y. It should be noted that N is a natural number.

[0062] Optionally, the first sub-region 21 a , the second sub-region 21 b , and the third sub-region 21 c of the main body 21 along the thickness direction Y may be a plurality of regions equally divided by thickness, or the main body 21 may be composed of a plurality of regions of arbitrary thickness.

[0063] Optionally, the multiple areas defined by the main body 21 may be virtual areas, and the main body 21 is actually a complete entity, thereby improving the bending stress release performance of the main body 21. The multiple areas defined by the main body 21 may also be a multi-layer superimposed structure, which is combined to form the main body 21, and the sub-area may also have a formed cavity structure 22, or after two or more adjacent sub-areas are superimposed, the partial cavity structures 22 in the two or more sub-areas are combined to form a bent cavity closed structure.

[0064] Optionally, multiple cavity structures 22 can be arranged in the first sub-region 21a; multiple cavity structures 22 can also be arranged in the second sub-region 21b; multiple cavity structures 22 can also be arranged in the third sub-region 21c; multiple cavity structures 22 can also be arranged in the first sub-region 21a and the second sub-region 21b; multiple cavity structures 22 can also be arranged in the first sub-region 21a and the third sub-region 21c; multiple cavity structures 22 can also be arranged in the second sub-region 21b and the third sub-region 21c; multiple cavity structures 22 can also be arranged in the first sub-region 21a, the second sub-region 21b and the third sub-region 21c.

[0065] It is understandable that when the plurality of cavity structures 22 are disposed in any one or several of the first zone, the second zone and the third zone, the plurality of cavity structures 22 still need to be arranged according to a preset arrangement rule.

[0066] Please continue reading Figure 5 In some optional embodiments of the present application, any two of the first sub-region 21a, the second sub-region 21b and the third sub-region 21c include a cavity structure 22, and the centers of the multiple cavity structures 22 in any two of the first sub-region 21a, the second sub-region 21b and the third sub-region 21c are located on the same straight line along the thickness direction Y of the main body 21.

[0067] Exemplarily, the first sub-region 21a includes multiple cavity structures 22, and the second sub-region 21b includes multiple cavity structures 22. The center of the cavity structure 22 in the first sub-region 21a and the center of the cavity structure 22 in the second sub-region 21b are located on the first straight line E1 along the thickness direction Y, so that the cavity structure 22 in the first sub-region 21a and the cavity structure 22 in the second sub-region 21b can provide the same bending stress release performance and tensile strength, which is beneficial to control the bending stress release performance and tensile strength of the buffer layer 20.

[0068] In some examples, the extension direction of the first straight line E1 is parallel to the thickness direction Y of the body portion 21 . In other examples, the extension direction of the first straight line E1 intersects with the thickness direction Y of the body portion 21 .

[0069] Please continue reading Figure 5 In some optional embodiments of the present application, the centers of the multiple cavity structures 22 inside any one of the first sub-area 21a, the second sub-area 21b and the third sub-area 21c are located on the same straight line along the first direction X.

[0070] Exemplarily, the first sub-area 21a includes a plurality of cavity structures 22, and the centers of the plurality of cavity structures 22 are located on the second straight line E2 along the first direction X, which facilitates the arrangement of the cavity structures 22 in the first sub-area 21a. Moreover, being located on the same straight line, the rebound force provided by the cavity structures 22 can also be provided by the same plane, thereby further reducing the possibility of depression of the display module 100.

[0071] In some examples, the extension direction of the second straight line E2 is parallel to the first direction X. In other examples, the extension direction of the second straight line E2 intersects with the first direction X.

[0072] See also Figure 6 In some optional embodiments of the present application, the buffer layer 20 further includes a support portion 23 , the support portion 23 is disposed on the main body portion 21 , and the support portion 23 is at least located in a portion of the bending zone 2 .

[0073] In some examples, the material of the support portion 23 is the same as that of the body portion 21. In other examples, the bending strength of the material of the support portion 23 is greater than that of the material of the body portion 21. The support portion 23 is used to increase the supporting force of the buffer layer 20.

[0074] Optionally, the support portion 23 is located in a portion of the bending zone 2; the support portion 23 is located in the bending zone 2 close to the center line 20a; the support portion 23 is located in the entire bending zone 2. It is understood that the thickness of the support portion 23 can be less than the thickness of the buffer layer 20, so that when the cavity structure 22 is provided in the buffer layer 20, a portion of space is reserved for the support portion 23, so that the buffer layer 20 has sufficient bending stress release performance and supporting force.

[0075] Please continue reading Figure 6 In some optional embodiments of the present application, the support portion 23 is located in at least one of the first sub-area 21a, the second sub-area 21b and the third sub-area 21c.

[0076] Optionally, the support portion 23 may be located in the first sub-area 21a; the support portion 23 may be located in the second sub-area 21b; the support portion 23 may be located in the third sub-area 21c; the support portion 23 may be located in the first sub-area 21a and the second sub-area 21b; the support portion 23 may be located in the first sub-area 21a and the third sub-area 21c; the support portion 23 may be located in the second sub-area 21b and the third sub-area 21c; the support portion 23 may be located in the first sub-area 21a, the second sub-area 21b and the third sub-area 21c.

[0077] On the other hand, an embodiment of the present application further provides a display device, comprising any one of the display modules 100 described above.

[0078] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display module, comprising a bending area and a non-bending area arranged side by side along a first direction, characterized in that: The display module comprises: A flexible display panel, comprising a backlight surface and a light emitting surface opposite to each other; A buffer layer is arranged on one side of the backlight surface of the flexible display panel, the buffer layer includes a main body and a plurality of cavity structures, the plurality of cavity structures are arranged at intervals along a first direction according to a preset rule, the buffer layer has a first equivalent thickness corresponding to the bending area, and the buffer layer has a second equivalent thickness corresponding to the non-bending area, the first equivalent thickness is less than the second equivalent thickness, the first equivalent thickness is the sum of the actual thickness of the buffer layer in the bending area within a unit volume, excluding the cavity structure in the buffer layer, and the second equivalent thickness is the sum of the actual thickness of the buffer layer in the non-bending area within a unit volume, excluding the cavity structure in the buffer layer; The bending area includes a center line and a boundary line connected to the non-bending area, and the inner diameter size of the cavity structure is arranged in a gradually decreasing pattern from the center line to the boundary line; The non-bending area includes an edge away from the boundary line along the first direction. From the boundary line to the edge, the inner diameter size of the cavity structure is arranged in a gradually decreasing pattern, or the inner diameter size of the cavity structure is equal, and the first direction intersects with the thickness direction of the buffer layer.

2. The display module according to claim 1, characterized in that: The number of the non-bending regions is two, and the two non-bending regions are arranged on both sides of the bending region in the first direction.

3. The display module according to claim 1, characterized in that: The maximum inner diameter of the cavity structure in the non-bending zone is less than or equal to the minimum inner diameter of the cavity structure in the bending zone.

4. The display module according to claim 1, characterized in that: The bending area includes a center line and a boundary line connected to the non-bending area, and the distance between two adjacent cavity structures gradually increases from the center line to the boundary line.

5. The display module according to claim 4, characterized in that: The non-bending area includes an edge away from the boundary line along the first direction, and the distance between two adjacent cavity structures gradually increases from the boundary line to the edge, or the distance between two adjacent cavity structures is equal.

6. The display module according to claim 5, characterized in that: The minimum distance between two adjacent cavity structures in the non-bending zone is greater than or equal to the maximum distance between two adjacent cavity structures in the bending zone.

7. The display module according to claim 1, characterized in that: The plurality of cavity structures are arranged to penetrate the buffer layer in the second direction; and / or, The plurality of cavity structures are distributed at intervals in the second direction, and the first direction intersects with the second direction.

8. The display module according to claim 1, characterized in that: The main body portion includes a first sub-area, a second sub-area and a third sub-area distributed successively along the thickness direction, and at least one of the first sub-area, the second sub-area and the third sub-area includes a plurality of the cavity structures arranged at intervals along the first direction according to a preset regular pattern.

9. The display module according to claim 8, characterized in that: Any two of the first sub-region, the second sub-region and the third sub-region include the cavity structure, and centers of the plurality of cavity structures in any two of the first sub-region, the second sub-region and the third sub-region are located on the same straight line along the thickness direction of the main body.

10. The display module according to claim 8, characterized in that: In any one of the first sub-region, the second sub-region, and the third sub-region, centers of the plurality of cavity structures inside the cavity structures are located on the same straight line along the first direction.

11. The display module according to claim 8, characterized in that: The buffer layer further includes a support portion, the support portion is disposed on the main body portion, and the support portion is at least located in a portion of the bending area.

12. The display module according to claim 11, characterized in that: The supporting portion is located in at least one of the first sub-region, the second sub-region, and the third sub-region.

13. A display device, characterized in that: Comprising a display module as described in any one of claims 1 to 12.

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