CN117082944A

CN117082944A - Display module and display device

Info

Publication number: CN117082944A
Application number: CN202311035236.4A
Authority: CN
Inventors: 祝奇枫; 许琴; 宋述雄
Original assignee: Hubei Changjiang New Display Industry Innovation Center Co Ltd
Current assignee: Hubei Changjiang New Display Industry Innovation Center Co Ltd
Priority date: 2023-08-16
Filing date: 2023-08-16
Publication date: 2023-11-17

Abstract

The application relates to the technical field of display, in particular to a display module and a display device. The display module provided by the application comprises: the display panel is arranged between the glass cover plate and the composite film, and the glass cover plate is adhered with the display panel through an adhesive layer; the composite film comprises a buffer layer, wherein the display panel is adhered to one side of the buffer layer, a plurality of microspheres are arranged in the buffer layer, and each microsphere comprises a wrapping ball film and an oxidation exothermic reactant filled in the wrapping ball film. According to the application, the buffer layer is provided with the microspheres, in the lamination process of manufacturing the display module, the laminated acting force presses the wrapping ball membrane to crack, the oxidation exothermic reactant generates chemical reaction when meeting air, heat is released, the heat heats the adhesive layer, the bonding stress is released and relieved, the bonding strength between the glass cover plate and the display panel is high, the bonding stress is reduced, the membrane layer is not easy to separate, air bubbles are not easy to generate, and the low-temperature drop-resistant strength of the display module is improved.

Description

Display module and display device

Technical Field

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

Background

From the CRT (Cathode Ray Tube) age to the liquid crystal display (LCD, liquid Crystal Display) age, to the now-coming OLED (Organic Light-Emitting Diode) age and the Light-Emitting Diode display age, the display industry has undergone decades of development to become more and more. The display industry is closely related to our life, and the display technology is not separated from the traditional mobile phones, flat-panel televisions and PCs to the current intelligent wearable equipment, VR, vehicle-mounted display and other electronic equipment.

The display module is an important component in the display device, and the improvement of the performance of the display module has important significance for the display device. Among them, a feasible display module assembly among the related art includes display panel and glass apron, is in the same place through the glue film adhesion between display panel and the glass apron, and the display module assembly of curved surface screen, the laminating stress in curved surface region is great, and the bonding strength in this region of display module assembly is little, and the circumstances of virtual subsides appears easily to the glue film that corresponds, leads to display panel and glass apron to separate easily, produces the bubble, influences display module assembly's display effect.

Disclosure of Invention

In view of the above, the present application provides a display module and a display device, which aim to improve the problem of small adhesion strength between a display panel and a glass cover plate, and improve the display effect of the display module.

In a first aspect, the present application provides a display module, including: the display panel is arranged between the glass cover plate and the panel composite film, and the glass cover plate is adhered with the display panel through an adhesive layer; the panel composite film comprises a buffer layer, the display panel is adhered to one side of the buffer layer, a plurality of microspheres are arranged in the buffer layer, and each microsphere comprises a wrapping ball film and an oxidation exothermic reactant filled in the wrapping ball film.

In a second aspect, based on the same inventive concept, the present application provides a display device, including the display module provided in the first aspect of the present application.

Compared with the prior art, the display module and the display device provided by the application have the advantages that at least the following effects are realized:

according to the application, the buffer layer is internally provided with the microspheres, the microspheres comprise the wrapping spherical film and the oxidation exothermic reactant filled in the wrapping spherical film, so that in the lamination process of manufacturing the display module, when the glass cover plate, the display panel and the composite film are laminated and bonded, the film layer is pressed along the thickness direction of the film layer to enable the glass cover plate, the buffer layer is extruded by the acting force, the wrapping spherical film in the buffer layer is pressed, after the wrapping spherical film is extruded and broken, the oxidation exothermic reactant in the wrapping spherical film is subjected to chemical reaction in the air to emit heat, the heat can be transferred to the adhesive layer by layer, the adhesive layer is heated, the adhesive layer is melted and flows are increased, the adhesive layer is enabled to flow and redistribute, and the adhesive layer is further immersed into a gap between the glass cover plate and the display panel, and after the adhesive layer is resolidified, the adhesive strength of the glass cover plate and the display panel is improved; and the attaching stress of the curved surface area is released and relieved; the adhesion strength between the glass cover plate and the display panel of the display module is high, the bonding stress is reduced, the film layer is not easy to separate, and then bubbles are not easy to generate, so that the display effect of the display module is improved.

Of course, it is not necessary for any one product to practice the application to achieve all of the technical effects described above at the same time.

Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the application, which proceeds with reference to the accompanying drawings.

Drawings

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.

FIG. 1 is a cross-sectional view of a related art display module;

FIG. 2 is a top view of a glass cover plate according to an embodiment of the present application;

FIG. 3 is a schematic view of an AA cross-section of a display module according to an embodiment of the present application;

FIG. 4 is a schematic view showing the structure of microspheres according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a buffer layer according to an embodiment of the present application;

FIG. 6 is a schematic diagram of another structure of a buffer layer according to an embodiment of the present application;

FIG. 7 is a schematic diagram of another structure of a buffer layer according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a display device according to an embodiment of the application.

Detailed Description

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, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.

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

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Accordingly, it is intended that the present application covers the modifications and variations of this application provided they come within the scope of the appended claims (the claims) and their equivalents. The embodiments provided by the embodiments of the present application may be combined with each other without contradiction.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Some existing display devices (such as mobile phones and flat panels) inevitably fall from high positions in the use process, in order to reduce the probability of damage caused by falling, the display devices can perform falling tests on products in the research and development stage so as to detect the falling resistance of the products, and improve the structure or the manufacturing process of the products according to the detection result, so that the falling resistance is improved.

When the display device is subjected to drop test in a low-temperature environment, bubbles are found to be easily generated on some display screens, and the reasons for generating the bubbles are obtained by carrying out multiple tests and analyzing test results:

fig. 1 is a cross-sectional view of a related art display module. Referring to fig. 1, the lamination process is one of the manufacturing processes of the display module, in which the glass cover plate 10 and the display panel 20 are aligned, and then the film layers are adhered together by pressing them by using a device in the thickness direction of the film layers so as to be closely pressed. The glass cover plate 10 and the display panel 20 are adhered together through the adhesive layer 40, so that the adhesive layer 40 corresponding to the curved surface area has concentrated attaching stress to the curved surface display module, film separation is easy to occur, air bubbles are generated between the film layers, and finally the display effect of the display product is affected.

In addition, since the adhesive layer 40 is less adhesive in a low temperature environment and the adhesive layer 40, the glass cover plate 10 and the display panel 20 are not deformed with cold contraction, the bonding stress of the curved surface area of the manufactured display module is increased in a low temperature environment. Under low temperature environment, when the curved surface area of display module assembly receives circumstances such as external force collision, the curved surface area is the non-level face, and easy atress warp, and after the curved surface area of display module assembly resumes deformation, glass apron 10 and/or display panel 20 are difficult to adhere again to glue film 40, consequently produce the bubble relatively easily in the curved surface area of display module assembly, influence the display effect of display product.

Therefore, the embodiment of the application provides a display module and a display device, which aim to solve the technical problems. The application will be described in detail below with reference to the drawings and the specific embodiments.

Fig. 2 is a top view of a display module according to an embodiment of the present application, fig. 3 is an AA cross-sectional view of the display module according to fig. 3, and fig. 4 is a schematic structural diagram of a microsphere according to an embodiment of the present application. It should be noted that, the embodiment shown in fig. 2 only illustrates the shape of the display module set of the present application by taking a rounded rectangular display module set as an example, and the specific structure of the display module set of the present application is not limited thereto, and in some other embodiments of the present application, the shape of the display module set may also be rectangular, circular, elliptical, or other structures including arc edges, which is not particularly limited thereto.

Referring to fig. 2 and 3, an embodiment of the present application provides a display module 1000, including: the display panel 200 is arranged between the glass cover plate 100 and the composite film 300, and the glass cover plate 100 and the display panel 200 are adhered through an adhesive layer 400; the composite film 300 includes a buffer layer 310, the display panel 200 is adhered to one side of the buffer layer 310, a plurality of microspheres 311 are disposed in the buffer layer 310, and the microspheres 311 include a pack ball film 301 and an oxidation exothermic reactant 302 filled in the pack ball film 301.

In particular, the glass cover 100 is located on the light-emitting surface side of the display panel 200, and the composite film 300 is located on the backlight surface side of the display panel 200. The composite film 300 may be a Super Clean Foam (SCF) composite film, which can play a role in buffering and damping an external force acting on the display panel 200, and can emit heat generated when the display panel 200 operates, thereby playing a role in protecting the display panel 200.

In a specific implementation, one side of the display panel 200 and one side of the buffer layer 310 can be adhered together through the reticulate pattern glue, and when the display panel 200 is adhered to the buffer layer 310, generated bubbles are extruded to the periphery through the reticulate pattern of the reticulate pattern glue until being removed, so that the display panel has the functions of adhesion and adhering and exhausting.

In addition, the buffer layer 310 is typically adhered to the screen glue before the buffer layer 310 is adhered to the display panel 200.

Alternatively, the display panel 200 provided in the embodiment of the present application may be a display panel adopting an Organic Light-Emitting Diode (OLED) display technology, and the basic structure of the Light-Emitting function layer of the OLED display panel includes an anode, a Light-Emitting material layer and a cathode, where the anode and the cathode are respectively located at two sides of the Light-Emitting material layer. When a power supply supplies a proper voltage, holes of the anode and electrons of the cathode are combined in the luminescent material layer to generate light. Compared with a thin film field effect transistor liquid crystal display, the OLED display panel has the characteristics of high visibility and high brightness, is more power-saving, light in weight and thin in thickness, and can be used as a flexible screen. The curved Glass Cover plate 100 is 3D CG (Cover Glass), and the curved Glass Cover plate 100 is bonded to the display panel 200 to obtain the curved screen. The curved surface screen is a left curved surface screen and a right curved surface screen or a four-sided curved surface screen.

Optionally, the glue layer 400 is OCA (Optically Clear Adhesive) glue.

In the display module provided in this embodiment, by disposing the plurality of microspheres 311 in the buffer layer 310, the microspheres 311 include the encapsulated ball 301 and the exothermic oxidizing reactant 302 filled in the encapsulated ball 301, so, in the lamination process of the display module, when the glass cover plate 100, the display panel 200 and the composite film 300 are laminated and bonded, the buffer layer 310 is pressed along the thickness direction of the film layer to apply a force to adhere the glass cover plate 100, the display panel 200 and the composite film, the force presses the encapsulated ball 301 in the buffer layer 310, after the encapsulated ball 301 is pressed and ruptured, the exothermic oxidizing reactant 302 in the encapsulated ball 301 encounters oxygen or/and water in the air, a chemical reaction occurs, and simultaneously, heat is released, the heat can be transferred to the adhesive layer 400 layer by layer, the adhesive layer 400 is heated, the fluidity of the adhesive layer 400 is increased, a certain flow and redistribution can occur to the gap between the glass cover plate 100 and the display panel 200, after the adhesive layer 400 is resolidified, and the bonding strength of the glass cover plate 100 and the display panel 200 is improved; and the attaching stress of the curved surface area is released and relieved; therefore, the manufactured display module has large adhesion strength between the glass cover plate 100 and the display panel 200, and reduced bonding stress, and bubbles are not easily generated due to film separation even in a low-temperature use environment, so that the low-temperature drop-resistant strength of the display module is improved, and the display effect of the display module is further improved.

It should be noted that, the exothermic temperature and the exothermic time period of the oxidizing and exothermic reactant 302 in the buffer layer 310 are designed and controlled within the high temperature resistance capability of the display panel 200, and the exothermic reaction of the oxidizing and exothermic reactant 302 does not affect the performance of the display panel 200.

Fig. 5 is a schematic structural diagram of a buffer layer according to an embodiment of the present application, fig. 6 is another schematic structural diagram of a buffer layer according to an embodiment of the present application, and fig. 7 is another schematic structural diagram of a buffer layer according to an embodiment of the present application. Referring to fig. 2, and fig. 5 to 7, in some embodiments, the glass cover plate 100 includes a planar region 110 and an arc region 120 curved toward the back of the planar region 110, and the planar region 110 and the arc region 120 are integrally formed; the distribution density of the microspheres 311 of the buffer layer 310 at the corresponding portion of the curved region 120 is greater than the distribution density of the microspheres 311 of the buffer layer 310 at the corresponding portion of the planar region 110.

In the display module of the embodiment, the transition region 130 is located between the planar region 110 and the bending region 120, and the bending region 120 bends along the thickness direction of the planar region 110, the bending region 120 and the transition region 130 are integrally formed, the planar region 110 and the bending region 120 are flat surfaces, and the transition region 130 is an arc surface transitioning from the planar region 110 to the bending region 120, so that the bonding stress of the transition region 130 is larger compared with the planar region 110 and the bending region 120. In this embodiment, more dense microspheres 311 are distributed in the buffer layer 310 corresponding to the transition region 130, when a film lamination force is applied during the lamination process of manufacturing the display module, when the microspheres 311 of the buffer layer 310 break, more heat can be generated, the adhesive layer 400 of the transition region 130 can absorb more heat, and more lamination stress in the transition region 130 can be released, so that the distribution density of the microspheres 311 corresponds to the distribution area of stress concentration in the display module, and the distribution of the microspheres 311 is more reasonable.

Optionally, the buffer layer 310 is disposed on the backlight surface side of the display panel 200, and the display panel 200 includes a display area and a non-display area around the display area, and the distribution density of the microspheres 311 near the non-display area around the display area is greater than the distribution density of the microspheres 311 in the display area because the non-display area has a relatively high bonding stress to improve the bonding strength between the non-display area and the glass cover plate 100.

It should be understood that the plurality of microspheres 311 in the buffer layer 310 may be distributed in a single layer (fig. 5), may be distributed in multiple layers (fig. 6 and 7), or may be distributed in discrete layers (fig. 3), as long as the distribution density of the microspheres 311 in the buffer layer 310 at the corresponding portion of the transition region 130 is greater than the distribution density of the microspheres 311 in the buffer layer 310 at the corresponding portions of the planar region 110 and the bending region 120.

Referring to FIGS. 3 and 4, in some embodiments, the buffer layer 310 has a thickness h of 120 μm to 180 μm and the microspheres 311 have a diameter d of 10 μm to 20 μm _。

Because the thickness h of the buffer layer 310 is smaller than 120 μm, the buffer performance of the buffer layer 310 is limited, which affects the shock absorption protection of the display module; when the thickness of the buffer layer 310 is more than 180 μm, the market demand of light and thin display modules is not facilitated. Therefore, in the embodiment, the thickness h of the buffer layer 310 is 120 μm to 180 μm, which not only can meet the buffering and damping requirements of the display module, but also can realize the light and thin requirements of the display module. Alternatively, the thickness h of the buffer layer 310 is 150 μm to 170 μm, or 130 μm to 160 μm.

In the lamination process of manufacturing the display module, when a force is applied to the lamination of the film layers, the force compresses the buffer layer 310; if the diameter d of the microspheres 311 is less than 10 μm, a greater force needs to be applied to compress the buffer layer 310 to a smaller thickness so as to squeeze the microspheres 311 to rupture; if the diameter of the microspheres 311 is more than 20 μm, the microspheres 311 are easily pressed to the microspheres 311 when the buffer layer 310 is gradually compressed by an applied force in the lamination process, the microspheres 311 may be broken earlier, and the generated heat loss is large. In this embodiment, the diameter of the microsphere 311 is 10 μm to 20 μm, which is matched with the acting force applied in the existing lamination process and the elastic deformation modulus of the buffer layer 310 in the thickness direction, so that the microsphere 311 can be successfully crushed in the lamination process, and the heat loss after crushing is reduced. Alternatively, the diameter d of the microspheres 311 is 12 μm to 18 μm.

With continued reference to fig. 3, in some embodiments, the composite film 300 further includes a heat sink layer 320 on a side of the buffer layer 310 facing away from the display panel 200.

In particular, the material of the heat dissipation layer 320 may be one of copper and aluminum or an alloy thereof.

In this embodiment, by disposing the heat dissipation layer 320 on the side of the buffer layer 310 away from the display panel 200, the heat dissipation efficiency of the buffer layer 310 on the side away from the display panel 200 can be improved, and the heat accumulation of the buffer layer 310 on the side away from the display panel 200 can be reduced.

Referring to fig. 7, in some embodiments, a plurality of layers of microspheres 311 are disposed within the buffer layer 310 in a thickness direction of the buffer layer 310, and a distribution density of the plurality of layers of microspheres 311 decreases layer by layer in a direction away from the heat dissipation layer 320.

In the case that the mass of the microspheres 311 in the buffer layer 310 is constant, when the plurality of microspheres 311 in the buffer layer 310 are arranged in a plurality of layers, referring to fig. 6, this embodiment provides a display module in which the distribution density of each layer of microspheres 311 is the same, the internal oxidation exothermic reactant 302 reacts to generate heat when the microspheres 311 are broken in the lamination process of manufacturing the display module, and the heat generated in the buffer layer 310 is uniformly distributed because the distribution density of each layer of microspheres 311 is the same, and the heat is not differentially radiated at both sides of the buffer layer 310, so that the heat of the buffer layer 310 at the side close to the heat dissipation layer 320 is more likely to be radiated through the heat dissipation layer 320, and the heat is not transferred to the adhesive layer 400, resulting in heat loss.

In this embodiment, by decreasing the distribution density of the multi-layer microspheres 311 layer by layer along the direction away from the heat dissipation layer 320, the distribution density of the microspheres 311 of the buffer layer 310 is larger at the side away from the heat dissipation layer 320, the distribution density of the microspheres 311 of the buffer layer 310 is smaller at the side close to the heat dissipation layer 320, and during the lamination process, when the microspheres 311 are broken, the oxidizing exothermic reactants 302 in the microspheres 311 react to emit heat, the heat at the side of the buffer layer 310 close to the heat dissipation layer 320 is less, more heat is accumulated at the side of the buffer layer 310 close to the display panel 200, and the heat transferred to the glue layer 400 is more at the side of the heat distribution inside the buffer layer 310 closer to the display panel 200, thereby reducing the loss of the microspheres 311.

Referring to fig. 3, in some embodiments, the material of the heat dissipation layer 320 is copper foil.

In this embodiment, the heat dissipation layer 320 is made of copper foil, which has excellent heat conduction property and is beneficial to heat dissipation in the buffer layer 310.

Referring to fig. 3, in some embodiments, the material of the buffer layer 310 is foam.

When the display panel 200 receives an external force, the display panel 200 presses the buffer layer 310, and on one hand, the buffer layer 310 absorbs a part of the external force, and on the other hand, the buffer layer 310 deforms under the action of the external force, so as to further absorb the external force, thereby preventing the display panel 200 from being broken due to collision.

In this embodiment, the material of the buffer layer 310 is foam, and the foam is porous, so that the buffer layer 310 has excellent damping and buffering properties, is light and thin, has reliable performance, and has loose foam structure, and the microspheres 311 are easily added into the buffer layer 310. In addition, the heat released by the reaction of the oxidizing exothermic reactant 302 in the microspheres 311 can be quickly transferred to the corresponding area of the glue layer 400 through the foam, thereby being beneficial to improving the heat transfer capability.

Referring to fig. 3, in some embodiments, the material surrounding the balloon membrane 301 is a pressure sensitive adhesive membrane.

In this embodiment, the material for wrapping the ball membrane 301 is a pressure-sensitive adhesive membrane, and the pressure-sensitive adhesive membrane has stable performance and low price, and when the pressure-sensitive adhesive membrane is used as the material for wrapping the ball membrane 301, the overall manufacturing cost of the buffer layer is reduced, so that the overall production cost of the display module is saved.

Referring to fig. 3, in some embodiments, the oxidizing exothermic reactant 302 is activated carbon, reduced iron powder particles, and a catalyst mixture.

In the display module provided in this embodiment, after the microsphere 311 is damaged, the reduced iron powder can react with oxygen and water in the air chemically to release heat, wherein the activated carbon has strong adsorption performance on the gas and water, so as to ensure that the oxidation reaction of the reduced iron powder and the oxygen is smoothly performed, and the catalytic material can ensure that the reduced iron powder can react and release heat rapidly after meeting the air. The exothermic temperature of the exothermic oxidation reactant 302 provided in this embodiment can reach about 55 °, and the exothermic time can reach about 8 hours, so that the adhesive layer 400 can be heated for a long time, the effect of bonding stress is good, and in addition, the exothermic oxidation reactant 302 is cheap and easy to obtain.

Referring to fig. 3, in some embodiments, the oxidizing exothermic reactant 302 is a mixture of calcium oxide, aluminum powder, sodium carbonate, and activated carbon.

In the display module provided in this embodiment, after the microsphere 311 is damaged, calcium oxide can react with water in the air, calcium oxide can also react with sodium carbonate, aluminum powder can react with water, and both the aluminum powder and the water react with each other with an exothermic reaction to release heat, wherein activated carbon has strong adsorption performance on water, so that the reaction between calcium oxide and water can be ensured to be carried out smoothly. The exothermic temperature of the exothermic oxidation reactant 302 provided in this embodiment can reach about 55 °, the heat release is durable, the adhesive layer 400 can be heated for a long time, the effect of bonding stress is good, and in addition, the exothermic oxidation reactant 302 is cheap and easy to obtain.

Based on the same inventive concept, the application also provides a display device. Fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present application, and referring to fig. 8, a display device 2000 according to the present embodiment includes a display module 1000 according to any of the foregoing embodiments of the present application.

It should be understood that the display device 2000 provided in the embodiment of the present application may be any product or component with a display function, such as a mobile phone, a tablet, a navigator, or a computer, which is not particularly limited in this regard. The display device provided by the embodiment of the present application has the beneficial effects of the display panel provided by the embodiment of the present application, and the specific description of the display panel in the above embodiments may be referred to specifically, and this embodiment is not repeated here.

In summary, the display module and the display device provided by the application at least realize the following beneficial effects:

in the lamination process of manufacturing the display module, when the glass cover plate 100, the display panel 200 and the composite film 300 are laminated and bonded, the buffer layer 310 is pressed along the thickness direction of the film layer so as to enable the film layer to be bonded, the buffer layer 310 is pressed by the acting force, the wrapping ball film 301 in the buffer layer 310 is pressed, after the wrapping ball film 301 is pressed and broken, the oxidizing exothermic reactant 302 in the wrapping ball film 301 is subjected to chemical reaction in the air, heat is released, the heat can be transferred to the glue layer 400 layer by layer, the glue layer 400 is heated, the glue layer 400 is melted and the fluidity is increased, the glue layer 400 can flow and redistribute, the glue of the glue layer 400 is further immersed into a gap between the glass cover plate 100 and the display panel 200, and after the glue layer 400 is resolidified, the bonding strength of the glass cover plate 100 and the display panel 200 is improved; and the attaching stress of the curved surface area is released and relieved; thus, the bonding strength between the glass cover plate 100 and the display panel 200 of the display module is high, the bonding reliability is high, the bonding stress is reduced, the film separation is difficult, and further, bubbles are difficult to generate, the low-temperature drop-resistant strength of the display module is improved, and the display effect of the display module is improved.

While certain specific embodiments of the application have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments 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, comprising: the display panel is arranged between the glass cover plate and the composite film, and the glass cover plate is adhered with the display panel through an adhesive layer;

the composite film comprises a buffer layer, the display panel is adhered to one side of the buffer layer, a plurality of microspheres are arranged in the buffer layer, and each microsphere comprises a wrapping ball film and an oxidation exothermic reactant filled in the wrapping ball film.

2. The display module of claim 1, wherein the glass cover plate comprises a planar region and an arc region curved toward the back of the planar region, the planar region and the arc region being of an integrally formed structure;

the distribution density of the microspheres of the buffer layer at the corresponding part of the curved region is greater than that of the microspheres of the buffer layer at the corresponding part of the plane region.

3. The display module of claim 1, wherein the buffer layer has a thickness of 120 μm to 180 μm and the microsphere has a diameter of 10 μm to 20 μm.

4. The display module of claim 1, wherein the composite film further comprises a heat sink layer positioned on the buffer layer facing away from the display panel.

5. The display module of claim 4, wherein a plurality of layers of the microspheres are disposed in the buffer layer in a thickness direction of the buffer layer, and a distribution density of the plurality of layers of the microspheres decreases layer by layer in a direction away from the heat dissipation layer.

6. The display module of claim 4, wherein the heat sink layer is copper foil.

7. The display module of claim 1, wherein the buffer layer is foam.

8. The display module of claim 1, wherein the material surrounding the ball membrane is a pressure sensitive adhesive membrane.

9. The display module of claim 1, wherein the exothermic oxidizing reactant is a mixture of activated carbon and reduced iron powder particles.

10. The display module of claim 1, wherein the exothermic oxidizing reactant is a mixture of calcium oxide, aluminum powder, sodium carbonate, and activated carbon.

11. A display device comprising a display module according to any one of claims 1-10.