Display module and display device

Abstract

The application discloses a display module and a display device, and belongs to the technical field of display. The display module comprises a flexible display panel and a supporting assembly. The supporting assembly comprises a first support, a second support and a third support located on opposite sides of the first support. The first support is hinged to the second support, and the first support is hinged to the third support. The supporting assembly further comprises a supporting frame and an air bag cavity. The air bag cavity is located on the side of the first support facing the flexible display panel. The air bag cavity is connected to the supporting frame through an elastic element. The display module comprises a folding state and a flat state. In the folding state, the second support and the third support control the air bag cavity to be in a compressed state. In the flat state, the second support and the third support control the air bag cavity to be in an expanded state, and the elastic element controls the supporting frame to support the flexible display panel of the bending area. The display device comprises the above display module. The application has a simple structure, can effectively improve the wrinkles of the folding area, and weaken the degree of wrinkles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, more particularly, to a display module and a display device. BACKGROUND

[0002] In recent years, flexible display technology is more and more favored by the market, and the flexible display technology is an important trend of the development of the current AMOLED (Active-matrix Organic Light Emitting Diode) display panel.

[0003] The flexible display screen refers to a display screen using a display panel that can be bent and has good flexibility. Compared with the traditional screen, the flexible screen has obvious advantages. Not only is it more lightweight in size, but it also has lower power consumption than the original device, which helps to improve the endurance of the device. At the same time, based on its characteristics of being bendable and having good flexibility, its durability is also much higher than that of the previous screen, which can reduce the probability of accidental damage to the device. In addition, the flexible display screen has the characteristics of being foldable, and people can fold the display device by using the flexibility of the display device, thereby bringing convenience to people in carrying and using the display device. However, to realize the folding function of the flexible screen, the screen itself must have good bending performance and flatness.

[0004] Although the foldable flexible display panel has been mass-produced, with the increase in the number of folds or after long-term placement, the folding position may produce irreversible wrinkles or warping problems. Wrinkles or warping are the imaging perception of the crease of the bending area of the flexible display panel by the human eye, which not only affects the visual effect, but also easily causes display failure phenomena such as bright and dark lines, affecting the visual effect.

[0005] Therefore, it is a technical problem to be solved by those skilled in the art to provide a display module and a display device that can effectively improve the wrinkles of the folding area and weaken the degree of wrinkles, and have a simple structure. SUMMARY

[0006] Therefore, the present application provides a display module and a display device to solve the problem that the foldable flexible display screen in the prior art is prone to wrinkles after being bent for many times, causing display failure.

[0007] The application discloses a display module, comprising: a flexible display panel and a support assembly located on the back light side of the flexible display panel; the display module comprises a bending area, a first non-bending area and a second non-bending area located on the opposite sides of the bending area; the support assembly comprises a first support, a second support and a third support located on the opposite sides of the first support, at least part of the first support is located in the bending area, at least part of the second support is located in the first non-bending area, at least part of the third support is located in the second non-bending area, the first support is hinged with the second support, and the first support is hinged with the third support; the support assembly further comprises a support frame and an air bag cavity, the air bag cavity is located on the side of the first support facing the flexible display panel, and the air bag cavity is connected with the support frame through an elastic element; the display module comprises a folding state and a flat state; in the folding state, the second support and the third support control the air bag cavity to be in a compressed state; in the flat state, the second support and the third support control the air bag cavity to be in an expanded state, and the elastic element controls the support frame to support the flexible display panel of the bending area.

[0008] Based on the same inventive concept, the application further discloses a display device comprising the display module.

[0009] Compared with the prior art, the display module and the display device provided by the application at least achieve the following beneficial effects:

[0010] The display module provided by the application can be a folding flexible display module, comprising a flexible display panel and a support assembly located on the side of the backlight surface of the flexible display panel. The support assembly is used to support the flexible display panel in the flat state of the display module to ensure the flatness of the display module in the flat state. The support assembly is used to protect the light exit surface of the flexible display panel in the folding state of the display module to avoid damage to the light exit surface of the flexible display panel caused by external impact. The support assembly can also be used to better control the folding effect of the display module when the display module switches from the flat state to the folding state. The support assembly can also be used to ensure the flatness of the display module after it is unfolded from the folding state. In addition, the application also provides a support assembly comprising a support frame and an air bag cavity. The air bag cavity is located on the side of the first support frame facing the flexible display panel. The air bag cavity is connected to the support frame by an elastic member. By increasing or decreasing the volume of the gas in the air bag cavity, the extension state of the elastic member can be changed, and then the support frame can be displaced in a direction perpendicular to the plane of the unfolded display module, thereby achieving the support effect on the bending area of the display module. In the folding state of the display module, the second support frame and the third support frame control the air bag cavity to be in a compressed state, the gas in the air bag cavity is discharged, the elastic member drives the support frame to sink in a direction perpendicular to the plane of the unfolded display module, so that after folding, the display module in the bending area has a containing space, avoiding the display module in the bending area being pressed by the support frame in the folding state, affecting the service life of the flexible display panel. In the flat state, the second support frame and the third support frame control the air bag cavity to be in an expanded state, the elastic member controls the support frame to support the flexible display panel in the bending area, the air bag cavity is filled with gas, the elastic member drives the support frame to rise in a direction perpendicular to the plane of the unfolded display module, so that after unfolding, the support frame supports the display module in the bending area, improving the flatness of the entire display module after unfolding, avoiding the flexible display panel of the display module being recessed in the bending area, thereby effectively improving the wrinkles of the flexible display panel in the bending area and reducing the degree of wrinkles. The structure of the support assembly provided by the application can solve the problem that the film layer material at the folding part of the existing folding display module is prone to creases and wrinkles due to the stress relaxation characteristics after repeated folding and unfolding, effectively improve and reduce the degree of wrinkles in the bending area, improve the display quality and enhance the visual perception of the user.

[0011] Of course, any product implementing the present application does not necessarily need to achieve all the technical effects described above at the same time.

[0012] Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments thereof, with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0013] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0014] Figure 1 is a schematic view of a planar structure of a display module provided by an embodiment of the application.

[0015] Figure 2 is a schematic view of a planar structure of a display module provided by an embodiment of the application. Figure 1 is a schematic view of a cross-sectional structure of A-A' in

[0016] Figure 3 is a schematic view of a planar structure of a display module provided by an embodiment of the application. Figure 1 is a schematic view of a cross-sectional structure of the display module in

[0017] Figure 4 is a schematic view of a connection structure of a support frame, an air bag cavity and an elastic member in Figure 3

[0018] Figure 5 is another schematic view of a cross-sectional structure of A-A' in Figure 1

[0019] is another schematic view of a cross-sectional structure of the display module in Figure 6 Figure 1 is another schematic view of a cross-sectional structure of the display module in

[0020] Figure 7 Figure 5 is a local enlarged view of a partial structure in

[0021] Figure 8 is another schematic view of a cross-sectional structure of the display module in Figure 1

[0022] Figure 9 is another schematic view of a cross-sectional structure of A-A' in Figure 1

[0023] Figure 10 is a schematic view of a cross-sectional structure of the display module in a transition from a flat state to a folded state. Figure 1

[0024] is another schematic view of a cross-sectional structure of A-A' in Figure 11 Figure 1 is another schematic view of a cross-sectional structure of A-A' in

[0025] Figure 12 Figure 1 is another schematic view of a cross-sectional structure of A-A' in

[0026] Figure 13 is a schematic view of a planar structure of a display device provided by an embodiment of the application. DETAILED DESCRIPTION ​​​​​​​

[0027] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps, the numerical expressions, and the numerical values set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0028] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the scope of the application, its application, or uses.

[0029] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the specification, where appropriate.

[0030] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of exemplary embodiments can have different values.

[0031] Various modifications and changes can be made as would be obvious to a person of ordinary skill in the art having the benefit of this disclosure, without departing from the spirit and scope of the application. Thus, the scope of the application should be limited only by the appended claims (the technical solutions claimed), and their equivalents. It should be noted that the embodiments provided by the present application can be combined with each other as long as they are not contradictory.

[0032] It should be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0033] After repeated folding of the folding area of the folding display module, the folding position is prone to dead folding (hard folding) or stress relaxation of the film layer material, resulting in obvious folding marks. In the prior art, in order to reduce the folding marks as much as possible, a U-shaped or water droplet-shaped hinge is generally used to process the folding position to avoid dead folding (hard folding). Although the screen is no longer dead folded by using the hinge technology, the stress relaxation phenomenon still exists due to repeated folding of the film layer material, and the folding mark is still very obvious. That is, although the U-shaped or water droplet-shaped hinge can alleviate the bending stress during folding, the screen will still have a small concave after being flattened at the folding position, which is manifested as a folding mark, resulting in poor display and affecting the visual experience of the user.

[0034] Based on the above problems, the present application provides a display module and a display device, which can effectively improve the wrinkles of the folding area and weaken the degree of wrinkles, and the structure is simple. The specific embodiments of the display module and the display device provided by the present application are described in detail as follows.

[0035] Please refer to the following descriptionFigures 1-3 , Figure 1 is a schematic view of a planar structure of a display module provided by an embodiment of the present application, Figure 2 is Figure 1 is a schematic view of a cross-sectional structure of A-A' in Figure 3 is Figure 1 is a schematic view of a cross-sectional structure of the display module in a folded state in The display module 000 provided by the embodiment includes a flexible display panel 10 and a support assembly 20 located on a backlight side 10B of the flexible display panel 10; the display module 000 includes a bending area WA, a first non-bending area NWA1 and a second non-bending area NWA2 located on opposite sides of the bending area WA.

[0036] The support assembly 20 includes a first support 201, a second support 202 and a third support 203 (not filled in the figure) located on opposite sides of the first support 201, at least part of the first support 201 is located in the bending area WA, at least part of the second support 202 is located in the first non-bending area NWA1, and at least part of the third support 203 is located in the second non-bending area NWA2; the first support 201 is hinged to the second support 202, and the first support 201 is hinged to the third support 203.

[0037] The support assembly 20 further includes a support frame 204 and an airbag cavity 205, the airbag cavity 205 is located on a side of the first support 201 facing the flexible display panel 10, and the airbag cavity 205 is connected to the support frame 204 through an elastic member 206.

[0038] The display module 000 includes a folded state and a flattened state.

[0039] In the folded state, as shown in Figure 3 , the second support 202 and the third support 203 control the airbag cavity 205 to be in a compressed state.

[0040] In the flattened state, as shown in Figure 2 , the second support 202 and the third support 203 control the airbag cavity 205 to be in an inflated state, and the elastic member 206 controls the support frame 204 to support the flexible display panel 10 of the bending area WA.

[0041] Specifically, the display module 000 provided by the embodiment can be a folding type flexible display module. The display module 000 includes a flexible display panel 10 and a support assembly 20 located on the backlight side 10B of the flexible display panel 10. The support assembly 20 is used to support the flexible display panel 10 in the flat state of the display module 000, so as to ensure the flatness of the display module 000 in the flat state. The support assembly 20 is used to protect the light emitting surface 10A of the flexible display panel 10 in the folding state of the display module 000, so as to avoid damage of the light emitting surface 10A of the flexible display panel 10 caused by external impact. Optionally, the support assembly 20 can also be used to better control the folding effect of the display module 000 when the display module 000 switches from the flat state to the folding state. The support assembly 20 can also be used to ensure the flatness of the display module 000 after the display module 000 switches from the folding state to the flat state.

[0042] The display module 000 of the embodiment includes a bending area WA, a first non-bending area NWA1 and a second non-bending area NWA2 located on opposite sides of the bending area WA. The display module 000 of the bending area WA can be bent under the control of the support assembly 20 to form a folded state in which the display module 000 of the first non-bending area NWA1 and the display module 000 of the second non-bending area NWA2 are stacked. The support assembly 20 of the embodiment includes a first support 201, a second support 202 and a third support 203 located on opposite sides of the first support 201. The first support 201, the second support 202 and the third support 203 can all be rigid structures, such as being made of aluminum alloy material. At least part of the first support 201 is located in the bending area WA, at least part of the second support 202 is located in the first non-bending area NWA1, and at least part of the third support 203 is located in the second non-bending area NWA2. Optionally, in the flat state of the display module 000, at least part of the second support 202 and at least part of the third support 203 can be located in the bending area WA for hinging with the first support 201 of the bending area WA. The first support 201 of the embodiment is hinged with the second support 202, and the first support 201 is hinged with the third support 203, that is, the first support 201 and the second support 202 can be understood as being movably connected, and the first support 201 and the third support 203 can also be understood as being movably connected. This facilitates gradually bringing the display module 000 of the first non-bending area NWA1 and the display module 000 of the second non-bending area NWA2 closer through the hinged parts of the first support 201 and the second support 202 and the hinged parts of the first support 201 and the third support 203 when the display module 000 switches from the flat state to the folded state, to form the folded state in which the two are stacked. It also facilitates gradually unfolding the stacked display module 000 of the first non-bending area NWA1 and the display module 000 of the second non-bending area NWA2 through the hinged parts of the first support 201 and the second support 202 and the hinged parts of the first support 201 and the third support 203 when the display module 000 switches from the folded state to the flat state, to present the flat effect of the display module 000.

[0043] And in order to ensure the flatness of the display module 000 after unfolding, the support assembly 20 is further provided, which includes a support frame 204 and an air bag cavity 205. The air bag cavity 205 is located on the side of the first support frame 201 facing the flexible display panel 10. The air bag cavity 205 is connected with the support frame 204 through an elastic member 206. Optionally, the elastic member 206 can be understood as a stretchable and compressible elastic structure with high elasticity, such as a spring structure, etc. The present embodiment does not limit this. Further optionally, the elastic member 206 can include a reset spring structure, such as a tension spring or a compression spring, etc. The present embodiment does not limit this. The air bag cavity 205 can be an air bag structure filled with gas such as air inside. The air bag cavity 205 can be made of materials with elasticity such as nylon, rubber, etc. Figure 4 As shown, Figure 4 is Figure 3 a connection structure diagram of the support frame, the air bag cavity and the elastic member in . The air bag cavity 205 is connected with the support frame 204 through the elastic member 206. It can be understood that one end of the support frame 204 is located inside the air bag cavity 205. The elastic member 206 is located inside the air bag cavity 205 and connected with the bottom 204A of the support frame 204. The top 204B of the support frame 204 is outside the air bag cavity 205 and faces the bending area WA position of the flexible display panel 10. By increasing or reducing the volume of the gas inside the air bag cavity 205, the extension and contraction state of the elastic member 206 can be changed, so that the support frame 204 can be displaced in the vertical direction (i.e. the direction Z perpendicular to the plane of the unfolded display module) in the figure, thereby realizing the support effect on the bending area WA of the display module 000.

[0044] Optionally, the support frame 204 of the support assembly 20 of the present embodiment can be a Figure 2 I-shaped structure as shown. The top 204B and the bottom 204A of the support frame 204 are both planar, which can improve the stability inside the air bag cavity 205 and the supportability outside the air bag cavity 205 to the flexible display panel 10.

[0045] The display module 000 of the present embodiment includes a folded state (as shown in Figure 3 ) and an unfolded state (as shown in Figure 2 );

[0046] In the folded state, as shown in Figure 3 , the second support frame 202 and the third support frame 203 control the air bag cavity 205 to be in a compressed state. The hinge joint between the second support frame 202 and the first support frame 201 is in a movable connection state. The hinge joint between the third support frame 203 and the first support frame 201 is in a movable connection state, thereby controlling the air bag cavity 205 to be in a compressed state, i.e. the gas inside the air bag cavity 205 is discharged. The elastic member 206 drives the support frame 204 to sink along the direction Z perpendicular to the plane of the unfolded display module (as shown inFigure 4 The air bag cavity and the support frame are in the state shown, so that after folding, the display module 000 of the bending area WA has a containing space, avoiding the display module 000 of the bending area WA being pressed by the support frame 204 in the folded state, affecting the service life of the flexible display panel 10.

[0047] In the unfolded state, as shown in Figure 2 As shown, the second support 202 and the third support 203 control the air bag cavity 205 to be in an inflated state, the elastic member 206 controls the support frame 204 to support the flexible display panel 10 of the bending area WA, the hinge connection between the second support 202 and the first support 201 is in a movable connection state, the hinge connection between the third support 203 and the first support 201 is in a movable connection state, and then the air bag cavity 205 can be controlled to be in an inflated state by opening the second support 202 and the third support 203, that is, the air bag cavity 205 is filled with gas, the support frame 204 is driven by the elastic member 206 to rise in the direction Z perpendicular to the plane on which the display module is located after unfolding, so that after unfolding, the support frame 204 supports the display module 000 of the bending area WA, improves the flatness of the entire display module 000 after unfolding, avoids the flexible display panel 10 of the display module 000 from being recessed in the bending area WA, and effectively improves the wrinkles of the flexible display panel 10 in the bending area WA, and reduces the degree of wrinkles. The structure of the support assembly 20 provided in the embodiment can solve the problem that the film layer material at the folding part of the existing folding display module is prone to creases and wrinkles due to the stress relaxation characteristics after being folded and unfolded repeatedly, effectively improve and reduce the degree of wrinkles in the bending area WA, and is beneficial to improving the display quality and improving the visual perception of the user.

[0048] It can be understood that the process of discharging and filling the gas in the air bag cavity 205 in the folded state and the specific structure are not limited, the gas in the air bag cavity 205 can be discharged and filled through an external gas channel, or a gas discharging and filling channel can be arranged inside the display module 00, which is not limited in the embodiment, and can be selected and arranged according to actual needs in specific implementation.

[0049] It should be noted that the embodiment is only an example of the structure included in the display module 000, and the structure included in the display module 000 is not limited thereto in specific implementation, and can also include other structures that can realize the display function and optimize the folding function, which can be understood with reference to the structure of the folding display screen in related technologies, and will not be described herein.

[0050] In some optional embodiments, please continue to refer to Figures 1-3In this embodiment, the first support 201 of the support assembly 20 is in a U-shaped structure, and the first support 201 includes a base 201A, a first side wall 201B and a second side wall 201C, and the first side wall 201B and the second side wall 201C are located on opposite sides of the base 201A;

[0051] At the first side wall 201B, the second support 202 is fixed with the first support 201 through the first hinge 301; and at the second side wall 201C, the third support 203 is fixed with the first support 201 through the second hinge 302.

[0052] In this embodiment, the first support 201 is hinged with the second support 202, and the specific connection structure that the first support 201 is hinged with the third support 203 can be that the first support 201 is designed into a U-shaped structure, that is, the first support 201 includes the first side wall 201B and the second side wall 201C on the two sides of the base 201A, and the first side wall 201B and the second side wall 201C on the opposite sides of the base 201A can be a structure integrally formed with the base 201A, the second support 202 is hingedly fixed with the first side wall 201B of the first support 201 at the first side wall 201B of the first support 201 through the first hinge 301, and the third support 203 is hingedly fixed with the second side wall 201C of the first support 201 at the second side wall 201C of the first support 201 through the second hinge 302. Through the design of the first hinge 301 and the second hinge 302, the first support 201 is movably connected with the second support 202, and the first support 201 is movably connected with the third support 203, which facilitates gradually approaching the display module 000 of the first non-bending area NWA1 and the display module 000 of the second non-bending area NWA2 through the first hinge 301 connecting the first support 201 and the second support 202 and the second hinge 302 connecting the first support 201 and the third support 203 when the display module 000 switches from the flat state to the folded state, forming the folded state of the two superimposed, and facilitating gradually unfolding the superimposed display module 000 of the first non-bending area NWA1 and the display module 000 of the second non-bending area NWA2 through the first hinge 301 connecting the first support 201 and the second support 202 and the second hinge 302 connecting the first support 201 and the third support 203 when the display module 000 switches from the folded state to the flat state, presenting the flat effect of the display module 000.

[0053] In some optional embodiments, please refer to Figure 1 、 Figure 5 、 Figure 6 and Figure 7 , Figure 5 is Figure 1 another cross-sectional structure schematic view of A-A' in Figure 6 is Figure 1Another cross-sectional structure diagram of the display module in the folded state, Figure 7 is Figure 5 A partial enlarged view of part of the structure in the embodiment, the airbag cavity 205 is in communication with the first airbag bag 501 through the first airbag channel 401, and the airbag cavity 205 is in communication with the second airbag bag 502 through the second airbag channel 402; wherein the first airbag bag 501 is located on the side of the first side wall 201B away from the second side wall 201C, and the second airbag bag 502 is located on the side of the second side wall 201C away from the first side wall 201B;

[0054] The side of the second support 202 away from the flexible display panel 10 includes a first groove 202K, and the shape of the first groove 202K matches the shape of the first airbag bag 501; the side of the third support 203 away from the flexible display panel 10 includes a second groove 203K, and the shape of the second groove 203K matches the shape of the second airbag bag 502;

[0055] In the folded state, the airbag cavity 205 is in a compressed state and the volume of the airbag cavity 205 is V01, the first airbag bag 501 and the second airbag bag 502 are both in an inflated state, the volume of the first airbag bag 501 is V11, and the volume of the second airbag bag 502 is V21;

[0056] In the unfolded state, the first airbag bag 501 and the first side wall 201B are fitted in the first groove 202K, and the second airbag bag 502 and the second side wall 201C are fitted in the second groove 203K; the first airbag bag 501 and the second airbag bag 502 are both in a compressed state, the volume of the first airbag bag 501 is V12, and the volume of the second airbag bag 502 is V22, wherein V12

[0057] The embodiment explains that the specific structure of setting the gas in the air bag cavity 205 to be discharged in the folded state and filled in the flattened state can be realized by the structure included in the display module 000 itself, and the assistance in the folding and flattening process is realized by the hinged second support 202 and the first support 201, and the hinged third support 203 and the first support 201. Specifically, an air bag channel that communicates with the air bag cavity 205 can be arranged on the side of the first support 201 that faces the air bag cavity 205. Optionally, an air bag channel that communicates with the lower half 205B cavity structure of the air bag cavity 205 can be arranged on the side of the first support 201 that faces the air bag cavity 205. The first air bag channel 401 extends towards the second support 202, the second air bag channel 402 extends towards the third support 203, a first air bag bag 501 that communicates with the first air bag channel 401 is arranged on the side of the first side wall 201B that is away from the second side wall 201C, and a second air bag bag 502 that communicates with the second air bag channel 402 is arranged on the side of the second side wall 201C that is away from the first side wall 201B, so that the lower half 205B cavity structure of the air bag cavity 205 communicates with the first air bag bag 501 through the first air bag channel 401, and the lower half 205B cavity structure of the air bag cavity 205 communicates with the second air bag bag 502 through the second air bag channel 402. A first recess 202K that matches the shape of the first air bag bag 501 is arranged on the side of the second support 202 that is away from the flexible display panel 10, and a second recess 203K that matches the shape of the second air bag bag 502 is arranged on the side of the third support 203 that is away from the flexible display panel 10,

[0058] The display module 000 of the embodiment can be understood as the original state when it is not unfolded, that is, the folded state is the original state of the display module 000. When the display module 000 is in the folded state, as shown in Figure 6As shown, the hinge structure of the second support 202 and the first support 201, the hinge structure of the third support 203 and the first support 201 can make the second support 202 and the third support 203 in the folded state of closing together, and the elastic member 206 can be a compression spring in the reset spring, that is, the spring ring and the spring ring have a gap in the stretched state under the force-free state, and only when subjected to external pressure, the spring ring and the spring ring have no gap in the compression state. Therefore, in the folded state of the display module 000, the elastic member 206 is in the original stretched state, at this time the elastic member 206 can control the bottom 204A of the support frame 204 to press and extrude the gas in the lower half 205B of the air bag cavity 205 below the bottom 204A of the support frame 204, that is, the cavity structure of the air bag cavity 205 (it can be understood that the space between the bottom 204A of the support frame 204 and the top of the air bag cavity 205 can be understood as the space where the elastic member 206 is located, that is, the upper half 205A of the cavity structure of the air bag cavity 205), so that the gas in the lower half 205B of the air bag cavity 205 is less and less, and the gas finally flows to the air bag bag on both sides, that is, the lower half 205B of the cavity structure of the air bag cavity 205 is not or rarely filled with gas in the folded state of the display module 000, and the gas is discharged, discharged through the first air bag channel 401 to the first air bag bag 501 for storage, and discharged through the second air bag channel 402 to the second air bag bag 502 for storage. The top 204B of the support frame 204 is away from the lower surface of the flexible display panel 10 in the bending area WA, avoiding extrusion damage to the flexible display panel 10 in the folded state, that is, not in use.When the display module 000 transitions from its original folded state to a flattened state, the hinge structure between the second support 202 and the first support 201 allows the second support 202 to flatten and move away from the third support 203. The first airbag 501 and the first sidewall 201B fit into the first groove 202K, which is equivalent to the second support 202 and the first sidewall 201B of the first support 201 jointly compressing the first airbag 501. This causes the gas in the first airbag 501 to fill the lower half 205B of the airbag cavity 205 along the first airbag channel 401. Similarly, the hinge structure between the third support 203 and the first support 201 allows the third support 203 to flatten and move away from the second support 202. The second airbag 502 and the first sidewall 201 fit into the first groove 202K. The two side walls 201C are fitted into the second groove 203K, which is equivalent to the third support 203 and the second side walls 201C of the first support 201 jointly squeezing the second airbag 502. This causes the gas in the second airbag 502 to fill the lower half 205B cavity structure of the airbag cavity 205 along the second airbag channel 402, resulting in more and more gas in the airbag cavity 205. Both the first airbag 501 and the second airbag 502 are in a compressed state, and the airbag cavity 205 is in an expanded state. After the lower half 205B cavity structure of the airbag cavity 205 is filled with more and more gas, the bottom 204A of the support frame 204 rises, and the elastic element 206, such as a tension spring, is compressed to a compressed state with no gap between the spring coils. Figure 5 As shown, this allows the top 204B of the support frame 204 to rise and provide better support for the flexible display panel 10 in the bending area WA, improving the overall flatness of the display module 000 in the flattened state and reducing creases in the bending area WA. When the display module 000 returns to the folded state from the flattened state, only the second bracket 202 and the third bracket 203 need to be closed. The first airbag 501 can be released from the first groove 202K, and the second airbag 502 can be released from the second groove 203K. The compression spring of the elastic element 206 can return to its original stretched state, and then the bottom 204A of the support frame 204 in the airbag cavity 205 is pressed down, expelling the gas in the lower half 205B cavity structure of the airbag cavity 205 and the bottom 204A of the support frame 204 into the released first airbag 501 and second airbag 502. The display module 000 then returns to the folded state. Figure 6 The folded state shown.

[0059] The embodiment realizes the communication between the air bag cavity 205 and the air bag bag through a simple air bag channel, and realizes the air bag cavity 205 discharging and filling by the display module 000 with the help of its own power through the extrusion of the second support 202 and the third support 203, and the display module 000 can also be kept in its own folded state by the elastic member 206 without external action interference, and the flatness of the display module 000 in the bending area WA is guaranteed by the support of the support frame 204 after unfolding. The conversion between the folded state and the unfolded state is simple, easy to operate, and can reduce the creases and guarantee the overall display effect of the display module 000.

[0060] Optionally, as shown in Figure 1 、 Figure 5 and Figure 6 , in the embodiment, in the folded state, the air bag cavity 205 is in a compressed state and the volume of the air bag cavity 205 is V01, specifically, the volume in the lower half 205B cavity structure of the air bag cavity 205 is V01, the first air bag bag 501 and the second air bag bag 502 are both in an inflated state, the volume of the first air bag bag 501 is V11, and the volume of the second air bag bag 502 is V21. In the unfolded state, the first air bag bag 501 and the first side wall 201B are fitted in the first groove 202K, the second air bag bag 502 and the second side wall 201C are fitted in the second groove 203K, and after the first air bag bag 501 and the second air bag bag 502 are extruded to discharge the gas, the first air bag bag 501 and the second air bag bag 502 are both in a compressed state, the volume V12 of the first air bag bag 501 after compression is smaller than the volume V11 of the first air bag bag 501 when inflated, i.e. V12

[0061] Optionally, V02-V01=(V11-V12)+(V21-V22), that is, the volume of the lower half 205B of the airbag cavity 205 after expansion is V02, the volume of the lower half 205B of the airbag cavity 205 in the folded state is V01, and the difference V02-V01 between the volumes of the lower half 205B of the airbag cavity 205 after expansion and before compression is equal to the sum of the difference V11-V12 between the volumes of the first airbag bag 501 in the expanded state and the compressed state and the difference V21-V22 between the volumes of the second airbag bag 502 in the expanded state and the compressed state, so that the sum of the volumes of the gas in the entire airbag bag, airbag channel and airbag cavity is unchanged whether the display module 000 is in the folded state or the flattened state, and only the position of the filled gas changes, thereby facilitating the display module 000 to maintain the folded state and the flattened state in different use environments, the state is controllable, and the use performance is improved.

[0062] Optionally, as shown in Figure 1 , Figures 5-7 , the volume of the first groove 202K opened by the second support 202 in the embodiment is V1, and the volume of the second groove 203K opened by the third support 203 is V2, wherein V1

[0063] Optionally, as shown in Figure 1 and Figure 5 , in the flattened state, the width W1 of the first groove 202K is equal to the sum of the thickness D1 of the first side wall 201B and the thickness D2 of the first airbag bag 501, and the width W2 of the second groove 203K is equal to the sum of the thickness D3 of the second side wall 201C and the thickness D4 of the second airbag bag 502.

[0064] The first recess 202K opened on the second support 202 and the second recess 203K opened on the third support 203 are arc-shaped grooves, and the inner wall surface of the first recess 202K is a rounded structure, and the inner wall surface of the second recess 203K is also a rounded structure. Thus, when the display module 000 is converted from the folded state to the flattened state, the second support 202 extrudes the first air bag 501, and the third support 203 extrudes the second air bag 502, which can avoid damaging the first air bag 501 and the second air bag 502, and can also avoid interference and damage caused by collision with other structures of the module during the rotation of the second support 202 and the third support 203, which is conducive to improving the service life of the module.

[0065] In some optional embodiments, please continue to refer to Figure 1 , Figure 5 and Figure 6 In the present embodiment, the first recess 202K opened on the second support 202 and the second recess 203K opened on the third support 203 are arc-shaped grooves.

[0066] The first recess 202K opened on the second support 202 and the second recess 203K opened on the third support 203 are arc-shaped grooves, and the inner wall surface of the first recess 202K is a rounded structure, and the inner wall surface of the second recess 203K is also a rounded structure. Thus, when the display module 000 is converted from the folded state to the flattened state, the second support 202 extrudes the first air bag 501, and the third support 203 extrudes the second air bag 502, which can avoid damaging the first air bag 501 and the second air bag 502, and can also avoid interference and damage caused by collision with other structures of the module during the rotation of the second support 202 and the third support 203, which is conducive to improving the service life of the module.

[0067] In some optional embodiments, please continue to refer to Figure 1 and Figure 8 , Figure 8 isFigure 1 Another cross-sectional structure diagram of the display module in the folding state is shown in FIG. 13B. In this embodiment, the inner wall of the first groove 202K includes a plurality of first rollers 601, and the inner wall of the second groove 203K includes a plurality of second rollers 602.

[0068] In this embodiment, when the recesses are opened in the second support 202 and the third support 203 in the display module 000, the second support 202 needs to extrude the first air bag 501 so that the compressed first air bag 501 and the first side wall 201B of the first support 201 are embedded in the first groove 202K, and the second support 202 needs to extrude the first air bag 501 so that the compressed second air bag 502 and the second side wall 201C of the first support 201 are embedded in the second groove 203K. Therefore, a plurality of first rollers 601 can be arranged on the inner wall of the first groove 202K, and a plurality of second rollers 602 can be arranged on the inner wall of the second groove 203K. When the inner wall of the first groove 202K and the inner wall of the second groove 203K extrude the air bag, the plurality of first rollers 601 on the inner wall of the first groove 202K and the plurality of second rollers 602 on the inner wall of the second groove 203K can protect the air bag and make the extrusion of the air bag more smooth, which is beneficial to improve the durability of the module structure and avoid damage caused by extrusion of the air bag.

[0069] Optionally, as shown in FIG. 13C, the number and uniformity of the first rollers 601 and the second rollers 602 are not limited in this embodiment. Further optionally, a plurality of first rollers 601 can be arranged on the inner wall of the first groove 202K in contact with the first air bag 501, and a plurality of second rollers 602 can be arranged on the inner wall of the second groove 203K in contact with the second air bag 501, so as to improve the durability of the air bag. Figure 8

[0070] It can be understood that the fixing mode and structure of the plurality of first rollers 601 and the inner wall of the first groove 202K, and the fixing mode and structure of the plurality of second rollers 602 and the inner wall of the second groove 203K are not specifically limited in this embodiment. They can be fixed by bolt riveting or other connecting structures, as long as they do not affect the embedding of the air bag and the side wall in the groove and make the extrusion process more smooth. This embodiment does not limit this.

[0071] In some optional embodiments, please refer to Figure 1 , Figure 9 and Figure 10 , Figure 9 is Figure 1 another cross-sectional structure diagram of A-A' in FIG. 13D, Figure 10 ​yes Figure 1 A cross-sectional structural diagram of the display module transitioning from a flattened to a folded state. Figure 10 (The support components in the conversion process are shown in dashed lines). In this embodiment, the airbag cavity 205 is connected to the third airbag 503 and the airbag cavity 205 is connected to the fourth airbag 504. The third airbag 503 and the fourth airbag 504 are located on opposite sides of the airbag cavity 205. The third airbag 503 and the fourth airbag 504 are both located on the side of the first bracket 201 facing the flexible display panel 10.

[0072] like Figure 10 As shown, in the folded state, the second support 202 compresses the third airbag 503, and the third support 203 compresses the fourth airbag 504. Both the third airbag 503 and the fourth airbag 504 are in a compressed state. The volume of the third airbag 503 is V31, and the volume of the fourth airbag 504 is V41. The airbag cavity 205 is in a compressed state, and the volume of the airbag cavity 205 is V001.

[0073] like Figure 9 As shown, in the flattened state, both the third airbag 503 and the fourth airbag 504 are inflated. The volume of the third airbag 503 is V32, and the volume of the fourth airbag 504 is V42, where V32 > V31 and V42 > V41. The airbag cavity 205 is inflated, and the volume of the airbag cavity 205 is V002, where V002 > V001.

[0074] This embodiment explains that the specific structure for filling and discharging gas in the airbag cavity 205 in the folded and flattened states can be achieved through the structure included in the display module 000 itself. By means of the hinged second bracket 202 and the first bracket 201, and the hinged third bracket 203 and the first bracket 201, the power during the folding and flattening process is converted into assistance. Specifically, a third airbag 503 and a fourth airbag 504 can be respectively provided on the side of the first bracket 201 facing the flexible display panel 10 and on the opposite sides of the airbag cavity 205. The third airbag 503 and the fourth airbag 504 are both located on the first bracket 201, and both the third airbag 503 and the fourth airbag 504 are connected to the airbag cavity 205, so that the third airbag 503 and the fourth airbag 504 are connected to the cavity structure of the upper half 205A of the airbag cavity 205.

[0075] In this embodiment, the display module 000 in its unfolded state can be understood as its original state, that is, the flattened state is the original state of the display module 000. When the display module 000 is in the flattened state, as... Figure 9As shown, the hinged structure of the second support 202 and the first support 201, and the hinged structure of the third support 203 and the first support 201, can make the second support 202 and the third support 203 in an open flat state, and the elastic member 206 can be a compression spring in a reset spring, that is, the spring ring has a gap between the coils in the tension state under no force, and only presents a compression state without a gap between the coils under external pressure. Therefore, in the folded state of the display module 000, the elastic member 206 is in the original tension state, and at this time the elastic member 206 in the tension state can control the bottom 204A of the support frame 204 in the upper half 205A of the air bag cavity 205, and then the top 204 of the support frame 204 rises to better support the flexible display panel 10 of the bending area WA, improve the overall flatness of the display module 000 in the flat state, and reduce the creases of the bending area WA. At this time, the upper half 205A of the air bag cavity 205 is basically not filled with gas or has little gas, and the gas is stored in the third air bag 503 and the fourth air bag 504 on both sides of the air bag cavity 205, which is convenient for the circulation of the gas in the subsequent process.

[0076] When the display module 000 is converted from the original flat state to the folded state, the hinged structure of the second support 202 and the first support 201, and the hinged structure of the third support 203 and the first support 201 can make the second support 202 and the third support 203 fold. When the second support 202 changes from unfolding to folding, the second support 202 extrudes the third air bag 503, and when the third support 203 changes from unfolding to folding, the third support 203 extrudes the fourth air bag 504. The gas originally stored in the third air bag 503 and the fourth air bag 504 flows into the upper half 205A cavity structure of the air bag cavity 205, and the gas in the upper half 205A cavity structure of the air bag cavity 205 becomes more and more, so that the compression spring of the elastic member 206 is converted from the original tension state to the compression state, the bottom 204A of the support frame 204 sinks, and the top 204B of the support frame 204 also sinks, that is, the support frame 204 is folded down, so that when the final display module 000 is in the folded state, the top 204B of the support frame 204 is away from the lower surface of the flexible display panel 10 of the bending area WA, avoiding extrusion damage to the flexible display panel 10 in the folded state.

[0077] Optionally, as shown in FIG. 10, the display module 000 can further include a fourth air bag 504 and a fifth air bag 505. Figure 9 and Figure 10As shown, the air bag cavity 205 of the embodiment is connected with the support frame 204 through the elastic member 206. It can be understood that the bottom 204A of the support frame 204 is located in the air bag cavity 205, the top 204B of the support frame 204 is located outside the air bag cavity 205, the elastic member 206 is located outside the air bag cavity 205, one end of the elastic member 206 is connected with the top 204B of the support frame 204, the other end of the elastic member 206 is connected with the top of the air bag cavity 205, the top 204B of the support frame 204 is located outside the air bag cavity 205 and is located at the position of the bending area WA of the flexible display panel 10, the extension state of the elastic member 206 can be changed through the increase or decrease of the gas volume in the upper half 205A cavity structure of the air bag cavity 205, and then the support frame 204 can be displaced in the longitudinal direction (i.e. the direction Z perpendicular to the plane where the display module is located) in the drawing, and then the support effect on the bending area WA of the display module 000 is realized.

[0078] The air bag cavity 205 provided on the first support frame 201 is communicated with the third air bag 503 and the fourth air bag 504, and the display module 000 can help the gas in the air bag cavity 205 to be discharged and filled through the extrusion of the second support frame 202 and the third support frame 203, and the display module 000 can also keep its own flat state through the action of the elastic member 206 without external action interference, and the flatness of the display module 000 in the bending area WA is guaranteed through the support of the support frame 204 after being flattened, the conversion between the folded state and the flat state is simple and easy to operate, the creases can be reduced, and the overall display effect of the display module 000 is guaranteed. The third air bag 503 and the fourth air bag 504 are both provided on the first support frame 201, which is also beneficial to reducing the size of the support module 20 in the horizontal direction in the drawing.

[0079] Optionally, as shown in FIG. 6, the air bag cavity 205 is connected with the support frame 204 through the elastic member 206, and the air bag cavity 205 is located in the support frame 204. Figure 1 , Figure 9 and Figure 10As shown, in the present embodiment, when in the unfolded state, the third air bag 503 is in an inflated state with a volume V32, the fourth air bag 504 is in an inflated state with a volume V42, the lower half 205B of the air bag cavity 205 is in an inflated state with a volume V002. When converted to the folded state, the second support 202 presses the third air bag 503, the third support 203 presses the fourth air bag 504, and the gas flows from the third air bag 503 and the fourth air bag 504 to the cavity structure of the upper half 205A of the air bag cavity 205. The volume V31 of the third air bag 503 in the compressed state is less than the volume V32 of the third air bag 503 in the inflated state when the module is unfolded, i.e., V32>V31. The volume V41 of the fourth air bag 504 in the compressed state is less than the volume V42 of the fourth air bag 504 in the inflated state when the module is unfolded, i.e., V42>V41. The volume V001 of the gas in the lower half 205B of the air bag cavity 205 in the compressed state is less than the volume V002 of the gas in the lower half 205B of the air bag cavity 205 in the inflated state. Thus, the sum of the volumes of the gas in the two air bags and the cavity structure of the upper half 205A of the air bag cavity is unchanged whether the display module 000 is in the folded state or the unfolded state. Only the location of the filling gas changes, which is conducive to maintaining the display module 000 in the folded state and the unfolded state in different use environments, and the state is controllable, which is conducive to improving the use performance.

[0080] In some optional embodiments, please refer to Figure 1 and Figure 11 , Figure 11 is Figure 1 Another cross-sectional structure of A-A' in the present embodiment, in which the support assembly 20 is fixed to the backlight side 10B of the flexible display panel 10 by the adhesive tape 70.

[0081] The present embodiment explains that when the support assembly 20 in the display module 000 is arranged on the backlight side 10B of the flexible display panel 10, the support assembly 20 can be fixed to the backlight side 10B of the flexible display panel 10 by the adhesive tape 70, the thickness of the adhesive tape 70 can be thinner, which is conducive to improving the connection stability of the support assembly 20 and the flexible display panel 10, reducing the overall thickness of the module, and simplifying the assembly process compared to the curing and fixing of the adhesive layer.

[0082] In some optional embodiments, please refer to Figure 1 and Figure 12 , Figure 12 is Figure 1Another cross-sectional structure schematic view of A-A' is shown in the embodiment, the support assembly 20 and the flexible display panel 10 further include a buffer layer 80.

[0083] The embodiment explains that when the support assembly 20 is arranged on the backlight side 10B of the flexible display panel 10 in the display module 000, the buffer layer 80 can be arranged between the support assembly 20 and the flexible display panel 10, the buffer layer 80 can be selected as a foam material, and the buffer performance of the display module 000 can be improved, and the screen strength is ensured.

[0084] In some optional embodiments, please refer to Figure 13 , Figure 13 A plane structure schematic view of a display device is provided in the embodiment, the display device 111 includes the display module 000 provided in the above embodiments. Figure 13 The embodiment only takes a mobile phone as an example to describe the display device 111, and it can be understood that the display device 111 provided in the embodiment can be a computer, a television, a vehicle-mounted display device or other display devices 111 having a display function, and the present application does not specifically limit this. The display device 111 provided in the embodiment has the beneficial effects of the display module 000 provided in the embodiment, and specific descriptions can be referred to the specific descriptions of the display module 000 in the above embodiments, and the embodiment will not be described here.

[0085] It can be known from the above embodiments that the display module and the display device provided in the present application at least achieve the following beneficial effects:

[0086] The display module provided by the application can be a folding flexible display module, comprising a flexible display panel and a support assembly located on the side of the backlight surface of the flexible display panel, the support assembly is used for supporting the flexible display panel in the flat state of the display module to ensure the flatness of the display module in the flat state, the support assembly is used for protecting the light exit surface of the flexible display panel in the folding state of the display module to avoid damage of the light exit surface of the flexible display panel caused by external impact. The support assembly can also be used to better control the folding effect of the display module when the display module switches from the flat state to the folding state, and the support assembly can also be used to ensure the flatness of the display module after unfolding when the display module switches from the folding state to the flat state. Furthermore, in order to ensure the flatness of the display module after unfolding, the support assembly comprises a support frame and an air bag cavity, the air bag cavity is located on the side of the first support frame facing the flexible display panel, the air bag cavity is connected with the support frame through an elastic member, and the extension state of the elastic member can be changed by increasing or reducing the volume of the gas in the air bag cavity, so that the support frame can be displaced in the direction perpendicular to the plane of the unfolded display module, thereby realizing the supporting effect on the bending area of the display module. In the folding state, the second support frame and the third support frame control the air bag cavity to be in a compressed state, the gas in the air bag cavity is discharged, the elastic member drives the support frame to sink in the direction perpendicular to the plane of the unfolded display module, so that the display module in the bending area has a containing space after folding, avoiding that the display module in the bending area is pressed against the support frame in the folding state, affecting the service life of the flexible display panel. In the flat state, the second support frame and the third support frame control the air bag cavity to be in an expanded state, the elastic member controls the support frame to support the flexible display panel in the bending area, the air bag cavity is filled with gas, the elastic member drives the support frame to rise in the direction perpendicular to the plane of the unfolded display module, so that the support frame supports the display module in the bending area after unfolding, improving the flatness of the entire display module after unfolding, avoiding that the flexible display panel of the display module is recessed in the bending area, thereby effectively improving the wrinkles of the flexible display panel in the bending area and reducing the degree of wrinkles. The structure of the support assembly provided by the application can solve the problem that the film layer material at the folding part of the existing folding display module is prone to creases and wrinkles due to the stress relaxation characteristics after repeated folding and unfolding, effectively improve and reduce the degree of wrinkles in the bending area, and is beneficial to improve the display quality and improve the visual perception of the user.

[0087] Although some specific embodiments of the application have been described in detail by examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the application. The scope of the application is defined by the appended claims.

Claims

1. A display module, characterized by The display module comprises a flexible display panel and a support assembly located on the back light side of the flexible display panel; the display module comprises a bending area, a first non-bending area and a second non-bending area located on the opposite sides of the bending area; The support assembly comprises a first support, a second support and a third support located on the opposite sides of the first support, at least part of the first support is located in the bending area, at least part of the second support is located in the first non-bending area, at least part of the third support is located in the second non-bending area, the first support is hinged with the second support, and the first support is hinged with the third support; The first support is a U-shaped structure, the first support comprises a base, a first side wall and a second side wall, and the first side wall and the second side wall are located on the opposite sides of the base; At the first side wall, the second support is fixed with the first support through a first hinge; at the second side wall, the third support is fixed with the first support through a second hinge; The support assembly further comprises a support frame and an airbag cavity, the airbag cavity is located on the side of the first support facing the flexible display panel, and the airbag cavity is connected with the support frame through an elastic element; The display module comprises a folding state and a flat state; In the folding state, the second support and the third support control the airbag cavity to be in a compressed state; In the flat state, the second support and the third support control the airbag cavity to be in an inflated state, and the elastic element controls the support frame to support the flexible display panel of the bending area; The airbag cavity is communicated with a first airbag bag through a first airbag channel, and the airbag cavity is communicated with a second airbag bag through a second airbag channel; wherein the first airbag bag is located on the side of the first side wall away from the second side wall, and the second airbag bag is located on the side of the second side wall away from the first side wall; The side of the second support away from the flexible display panel comprises a first groove, the shape of the first groove matches the shape of the first airbag bag; the side of the third support away from the flexible display panel comprises a second groove, the shape of the second groove matches the shape of the second airbag bag; In the folding state, the airbag cavity is in a compressed state and the volume of the airbag cavity is V01, the first airbag bag and the second airbag bag are both in an inflated state, the volume of the first airbag bag is V11, and the volume of the second airbag bag is V21; In the flat state, the first airbag bag and the first side wall are fitted in the first groove, and the second airbag bag and the second side wall are fitted in the second groove; the first airbag bag and the second airbag bag are both in a compressed state, the volume of the first airbag bag is V12, and the volume of the second airbag bag is V22, wherein V12 Comprise 2. A display module, characterized by ​ The display module comprises a flexible display panel and a support assembly located on the backlight side of the flexible display panel; the display module comprises a bending area, a first non-bending area and a second non-bending area located on the opposite sides of the bending area; The support assembly comprises a first support, a second support and a third support located on the opposite sides of the first support, at least part of the first support is located in the bending area, at least part of the second support is located in the first non-bending area, and at least part of the third support is located in the second non-bending area; the first support is hinged with the second support, and the first support is hinged with the third support; The first support is a U-shaped structure, and the first support comprises a base, a first side wall and a second side wall located on the opposite sides of the base; At the first side wall, the second support is fixed with the first support through a first hinge; at the second side wall, the third support is fixed with the first support through a second hinge; The support assembly further comprises a support frame and an airbag cavity, the airbag cavity is located on the side of the first support facing the flexible display panel, and the airbag cavity is connected with the support frame through an elastic element; The display module comprises a folding state and a flat state; In the folding state, the second support and the third support control the airbag cavity to be in a compressed state; In the flat state, the second support and the third support control the airbag cavity to be in an inflated state, and the elastic element controls the support frame to support the flexible display panel of the bending area; The airbag cavity communicates with a third airbag bag and a fourth airbag bag, the third airbag bag and the fourth airbag bag are located on the opposite sides of the airbag cavity respectively, and the third airbag bag and the fourth airbag bag are located on the side of the first support facing the flexible display panel; In the folding state, the second support extrudes the third airbag bag, the third support extrudes the fourth airbag bag, the third airbag bag and the fourth airbag bag are in a compressed state, the volume of the third airbag bag is V31, and the volume of the fourth airbag bag is V41; the airbag cavity is in a compressed state and the volume of the airbag cavity is V001; In the flat state, the third airbag bag and the fourth airbag bag are in an inflated state, the volume of the third airbag bag is V32, and the volume of the fourth airbag bag is V42, wherein V32>V31 and V42>V41; the airbag cavity is in an inflated state and the volume of the airbag cavity is V002, V002>V001.

3. The display module of claim 1 or 2, wherein, The elastic element comprises a reset spring.

4. The display module of claim 1, wherein, V02-V01=(V11-V12)+(V21-V22).

5. The display module of claim 1, wherein, The volume of the first groove is V1, and the volume of the second groove is V2, wherein V1 6. The display module of claim 1, wherein, In the flattened state, a width of the first groove is equal to a sum of a thickness of the first sidewall and a thickness of the first air bag, and a width of the second groove is equal to a sum of a thickness of the second sidewall and a thickness of the second air bag.

7. The display module of claim 1, wherein, The elastic member comprises a compression spring.

8. The display module of claim 1, wherein, An inner wall of the first groove comprises a plurality of first rollers, and an inner wall of the second groove comprises a plurality of second rollers.

9. The display module of claim 1, wherein, The first groove and the second groove are both arc-shaped grooves.

10. The display module of claim 1 or 2, wherein, The support assembly and the flexible display panel are fixed by a tape.

11. The display module of claim 1 or 2, wherein, A buffer layer is further included between the support assembly and the flexible display panel.

12. A display device comprising: The display module comprises any one of claims 1-11.

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