Display screen and display device

Abstract

The application provides a display screen and a display device. In the display screen, a display panel comprises a display area and a peripheral area located at one side of the display area, the peripheral area comprises a circuit trace area, a bending area and a binding area arranged in sequence in a direction away from the display area, the binding area is bent to a back side of the display panel through the bending area, a glue layer is arranged on a light-emitting surface of the display panel, a polarizer is arranged on a surface of the glue layer away from the display panel, a cover plate is arranged on a side of the polarizer away from the display panel, and a normal projection of an edge line of the polarizer in the peripheral area on the cover plate is on the same straight line as a normal projection of an outer edge line of a bending surface of the bending area on the cover plate. When the display panel is bent, the polarizer can not only play a supporting role to improve the impact resistance of the display screen, but also control the bending area to reduce the bending radius R of the bending area, so that the narrow frame design of the display screen is realized, and the glue layer can provide stronger support for the polarizer during the bending process.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically, to display screens and display devices. Background Technology

[0002] With the widespread adoption of full-screen smartphones, bezels are becoming increasingly narrow, leading to smaller bending radii during the pad bending process of flexible screens. A smaller bending radius significantly increases the bending strain on the source and drain electrodes in the display panel, making them more susceptible to metal wire cracking. It also reduces impact resistance. Furthermore, the bezel width doesn't decrease considerably, remaining relatively wide.

[0003] Therefore, further research is needed on flexible display panels. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in the related art. To this end, one object of this invention is to provide a display screen with a narrow bottom bezel.

[0005] In one aspect of the invention, a display screen is provided. According to an embodiment of the invention, the display screen includes: a display panel, the display panel including a display area and a peripheral area located on one side of the display area, the peripheral area including a circuit trace area, a bending area and a bonding area arranged sequentially in a direction away from the display area, the bonding area being bent to the back side of the display panel via the bending area; an adhesive layer disposed on the light-emitting surface of the display panel; a polarizer disposed on the surface of the adhesive layer away from the display panel; and a cover plate disposed on the side of the polarizer away from the display panel, wherein the orthographic projection of the edge line of the polarizer in the peripheral area onto the cover plate is collinear with the outer edge line of the curved surface of the bending area. Therefore, the orthographic projection of the edge line of the polarizer in the peripheral area onto the cover plate and the orthographic projection of the outer edge line of the curved surface of the bending area onto the cover plate are on the same straight line. That is to say, in the peripheral area, the orthographic projection of the display panel on the polarizer overlaps with the polarizer, meaning the polarizer extends to the edge of the peripheral area. So when the display panel is bent, the polarizer can not only provide support and improve the impact resistance of the display screen, but also control the bending area, so that the orthographic projection of the bending start point of the bending area onto the polarizer is inside the polarizer, which helps to reduce the bending radius R of the bending area, thereby reducing the bending width of the bending area, and further helping to reduce the width of the peripheral area, that is, to achieve the narrow bezel design of the display screen. At the same time, the adhesive layer can provide stronger support for the polarizer during the bending process to prevent damage to the polarizer during bending.

[0006] According to an embodiment of the present invention, the bending area includes a bent segment and a flat segment connected to each other. The bent segment is connected to the circuit trace area, and the flat segment is connected to the bonding area. The display screen further includes: a first back film, which is disposed on the side of the display panel away from the polarizer, covers the display area and extends to the circuit trace area, and is spaced apart from the bent segment in the circuit trace area; and a second back film, which is disposed on the side of the bonding area close to the first back film, covers the bonding area and extends to the flat segment, and is spaced apart from the bent segment.

[0007] According to an embodiment of the present invention, the linear spacing between the first back film and the bent segment is 100 to 300 micrometers, the linear spacing between the second back film and the bent segment is 100 to 300 micrometers; and / or, the linear spacing between the edge line of the flat segment and the edge line of the flat segment away from the bent segment is 50 to 200 micrometers.

[0008] According to an embodiment of the present invention, the display screen further includes: a metal support layer disposed on the side of the first back film near the second back film, and its orthographic projection on the cover plate covers the display area and part of the circuit trace area; a heat sink disposed on the surface of the first back film away from the display panel, and located at one end of the metal support layer away from the display area; foam adhesive disposed on the surface of the heat sink away from the display panel, and bonded to the second back film; and a driver IC disposed on the surface of the bonding area away from the second back film, the orthographic projection of the driver IC on the cover plate being located inside the orthographic projection of the heat sink on the cover plate.

[0009] According to an embodiment of the present invention, in the horizontal direction, there is a gap between the metal support layer and the heat sink, the gap being 200 to 400 micrometers.

[0010] According to an embodiment of the present invention, the thickness of the heat sink is 0.05 to 0.15 mm.

[0011] According to an embodiment of the present invention, the bending radius of the bending area is less than or equal to 0.2 mm.

[0012] According to an embodiment of the present invention, the orthographic projection of the adhesive layer on the cover plate overlaps with the orthographic projection of the polarizer on the cover plate, and the adhesive layer covers a portion of the bent section, the side end face of the adhesive layer away from the display area has a crack, and the display panel further includes: an adhesive filling structure, the adhesive filling structure filling the crack.

[0013] According to an embodiment of the present invention, the display screen further includes: a buffer adhesive, which is bonded to the concave surface of the bending section, and the buffer adhesive is disposed in a manner that does not contact the first back film and the second back film.

[0014] According to an embodiment of the present invention, in the direction in which the bending opening of the bending segment faces, the thickness of the buffer adhesive is greater than the bending width of the bending segment.

[0015] In another aspect, the present invention provides a display device. According to an embodiment of the invention, the display device includes the aforementioned display screen. Consequently, the display device has a narrower bezel. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the structure of a display screen before bending in the prior art;

[0018] Figure 2 yes Figure 1 A schematic diagram of the display screen after bending;

[0019] Figure 3 This is a schematic diagram of the display screen before bending in one embodiment of the present invention;

[0020] Figure 4 yes Figure 3 A schematic diagram of the display screen after bending;

[0021] Figure 5 This is a schematic diagram of the display screen after bending in another embodiment of the present invention. Detailed Implementation

[0022] The present invention will be explained below with reference to embodiments. Those skilled in the art will understand that the following embodiments are for illustrative purposes only and should not be considered as limiting the scope of the invention. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in the field or according to the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be obtained commercially.

[0023] The present invention will now be described with reference to specific embodiments. It should be noted that these embodiments are merely descriptive and do not limit the present invention in any way.

[0024] In currently common flexible displays, refer to Figure 1 (before bending) and Figure 2(After bending), in the peripheral area on one side of the display screen, the polarizer 1 is located on the light-emitting surface of the display panel 2 and has a certain distance from the bending area S of the display panel (in the bending area, some insulating layers in the display panel are etched away, which will thin the display panel and improve the bending performance of the bending area S). A protective adhesive layer 4 (MCL, Metal Cover Later) is provided on the light-emitting surface at the bending area S. A first backlight surface 31 and a second backlight film 32 are provided on the surface of the backlight surface of the display panel. A support layer 5 is provided on the side of the first backlight film 31 away from the display panel 2. The support layer 5 has a certain heat dissipation function. Foam adhesive 6 is provided on the side of the support layer 5 away from the display panel 2. After bending, the foam adhesive 6 is bonded to the second back film 32. After bending, the driver IC 7 is located on the surface of the display panel 2 away from the foam adhesive 6. In the flexible display screen with the above structure, the bezel width on this side of the display screen is equal to A + B + C + D, where A is the width of the circuit trace area, B is the distance between the boundary line of the bending area S and the circuit trace area and the bending start point, C is the bending width (the bending width is the bending radius R), and D is the sum of the thicknesses of the display panel 2 and the protective adhesive layer 4. It can be seen that the bezel width of this display screen is relatively large. To further reduce the bezel width on this side of the display screen, in this invention, the polarizer is extended to the bending start point, i.e., the position of the first back film end point in the figure. The bending area is controlled by the polarizer, thereby reducing the bending radius.

[0025] The technical solution of the present invention will be described in detail below:

[0026] In one aspect of the invention, a display screen is provided. According to an embodiment of the invention, reference is made to... Figure 3 (before bending) and Figure 4 (After bending), the display screen includes: a display panel 20, which includes a display area AA and a peripheral area located on one side of the display area. In the direction away from the display area AA, the peripheral area includes a circuit trace area S1, a bending area S, and a bonding area S2 arranged sequentially. The bonding area S2 is bent to the back side of the display panel 20 via the bending area S; an adhesive layer 40, which is disposed on the light-emitting surface of the display panel 20; a polarizer 10, which is disposed on the surface of the adhesive layer 40 away from the display panel 20; and a cover plate 12, which is disposed on the side of the polarizer 10 away from the display panel 20, and the orthographic projection of the edge line of the polarizer 10 in the peripheral area onto the cover plate 12 is on the same straight line as the orthographic projection of the outer edge line of the curved surface of the bending area onto the cover plate 12 (e.g., ...). Figure 4(As shown). Thus, the orthographic projection of the edge line of the polarizer 10 in the peripheral area onto the cover plate 12 is on the same straight line as the outer edge line of the curved surface of the bending area S. That is to say, in the peripheral area, the orthographic projection of the display panel 20 onto the polarizer 10 overlaps with the polarizer 10, meaning the polarizer 10 extends to the edge of the peripheral area. Therefore, when the display panel is bent, the polarizer 10 can not only provide support and improve the impact resistance of the display screen, but also control the bending area, so that the orthographic projection of the bending starting point of the bending area S onto the polarizer 10 is located inside the polarizer. This helps to reduce the bending radius R of the bending area, thereby reducing the bending width C (the bending width C is the bending radius R), which in turn helps to reduce the width of the peripheral area, thus achieving a narrow bezel design for the display screen. At the same time, the adhesive layer 40 can provide stronger support for the polarizer 10 during the bending process to prevent damage to the polarizer during bending.

[0027] According to an embodiment of the present invention, referring to Figure 3 The cover plate 12 can be bonded to the polarizer 10 using optical adhesive 11. Furthermore, as is well known to those skilled in the art, a display panel has a non-display area of ​​a certain size around its display area. The aforementioned "peripheral area" of the invention refers to the non-display area on one side of the display area, i.e., the non-display area on the side where the driver IC is bonded. According to an embodiment of the present invention, the peripheral area of ​​the display panel can be located on the lower side of the display panel, i.e., at the lower end of the display screen.

[0028] According to embodiments of the present invention, the thickness of the adhesive layer 40 is 25–50 micrometers (e.g., 25 micrometers, 28 micrometers, 30 micrometers, 35 micrometers, 40 micrometers, 45 micrometers, or 50 micrometers), and / or the modulus of the adhesive layer 40 is less than or equal to 100 kPa (e.g., modulus of 100 kPa, 95 kPa, 92 kPa, 90 kPa, 858 kPa, 85 kPa, 82 kPa, 80 kPa, 75 kPa, 72 kPa, 70 kPa, 65 kPa, etc.). The appropriate thickness of the adhesive layer provides strong support for the polarizer 10, preventing damage during bending and minimizing an excessive increase in the overall thickness of the display screen. The modulus of less than or equal to 100 kPa effectively absorbs the misalignment space formed during bending, providing good stability for the display screen.

[0029] Furthermore, the adhesive layer 40 can be an optical pressure-sensitive adhesive, which provides better light transmittance and will not affect the display quality of the screen.

[0030] According to embodiments of the present invention, such as Figure 3 and Figure 4As shown, after the bending area S is bent, the bending area S includes a bent segment S-1 and a flat segment S-2 that are connected to each other. The bent segment S-1 is connected to the circuit trace area S1, and the flat segment S-2 is connected to the bonding area S2. The display screen also includes: a first back film 31, which is disposed on the side of the display panel 20 away from the polarizer 10. The first back film 31 covers the display area and extends to the circuit trace area S1, and is spaced apart from the bent segment S-1 in the circuit trace area S1; and a second back film 32, which is disposed on the side of the bonding area S2 close to the first back film 31. The second back film 32 covers the bonding area S2 and extends to the flat segment S-2, and is spaced apart from the bent segment S-1. It can be seen that the first back film 31 and the second back film 32 are recessed inward from the original bending point, which can effectively release the stress of the traces in the source and drain electrode layers in the display area and avoid the adverse phenomenon of trace breakage due to stress concentration.

[0031] As mentioned earlier, in the bending area S, some insulating layers in the display panel are etched away, which thins the display panel and improves the bending performance of the bending area S, thus enabling the bending area S to have bendable performance. However, in the display screen, it is not necessarily required that the entire bending area S undergoes substantial bending. The bending segment S-1 mentioned above in this invention refers to the part of the bending area S that undergoes substantial bending, while the flat segment S-2 is the same as the non-bending area and does not undergo bending.

[0032] According to an embodiment of the present invention, referring to Figure 4 The bending start point of the curved section is the endpoint of the bending area S near the circuit trace area S1. This allows for a further reduction in the bending width C and the bezel width. The bezel width of the display screen's peripheral area = A + C, where A is the width of the circuit trace area S1, and C is the bending width of the bent section S-1 (the bending width C is the bending radius R). Therefore, compared to... Figure 2 The structure of the central display screen significantly reduces the width of the border area of ​​the peripheral region in this invention.

[0033] In some embodiments of the present invention, reference is made to... Figure 4The linear spacing D1 between the first back film 31 and the bent section S-1 is 100–300 micrometers (e.g., 100 micrometers, 125 micrometers, 150 micrometers, 175 micrometers, 200 micrometers, 225 micrometers, 250 micrometers, 275 micrometers, 300 micrometers), and the linear spacing D2 between the second back film 32 and the bent section S-1 is 100–300 micrometers (e.g., 100 micrometers, 125 micrometers, 150 micrometers, 175 micrometers, 200 micrometers, 225 micrometers, 250 micrometers, 275 micrometers, 300 micrometers). That is, the first and second back films are each reduced inward by 100–300 micrometers. This reduction effectively releases the stress on the traces in the source and drain electrode layers of the display area without affecting the good support performance of the display panel.

[0034] In some embodiments of the present invention, reference is made to... Figure 4 The linear spacing D3 between the edge line of the flat section S-2 and the edge line of the flat section S-2 away from the bending section S-1 (i.e., the critical line between the bending area S and the bonding area S2) of the second back film 32 is 50 to 200 micrometers (e.g., 50 micrometers, 65 micrometers, 80 micrometers, 90 micrometers, 100 micrometers, 125 micrometers, 150 micrometers, 175 micrometers, 200 micrometers). In this way, the inward retraction of the second back film 32 will not exceed the bending area S, providing a certain degree of support to the bending area S, thereby ensuring the overall structural stability of the display screen.

[0035] In the embodiments of the present invention, there are no special requirements for the thickness and material of the first back film and the second back film. Those skilled in the art can make flexible designs based on the current existing technology and actual conditions. For example, the materials of the first back film and the second back film can be PI or PET, etc.

[0036] According to an embodiment of the present invention, referring to Figure 3 and Figure 4 No protective adhesive layer (MCL) is installed in the bending area. This allows for the release of stress in the bending section S-1.

[0037] According to an embodiment of the present invention, referring to Figure 3 and Figure 4The display screen also includes: a metal support layer 50, which is disposed on the side of the first back film 31 near the second back film 32, and the orthographic projection of the metal support layer 50 on the cover plate 12 covers the display area AA and part of the circuit wiring area S1; a heat sink 80, which is disposed on the surface of the first back film 31 away from the display panel 20, and located at the end of the metal support layer 50 away from the display area AA; and foam adhesive 60, which is disposed on the surface of the heat sink 80 away from the display panel 20, and the foam adhesive 60 is bonded to the second back film 32 (after bending). As mentioned above, the bending radius R of the bending section of the present invention is reduced. Therefore, when bending, the distance between the second back film 32 and the first back film 31 is also reduced, that is, the space for placing the metal support layer 50 and the foam adhesive 60 is reduced. Therefore, in the present invention, the metal support layer 50 and the foam adhesive 60 are staggered instead of stacked. A heat sink 80 is provided between the foam adhesive 60 and the first back film 31, so that the thickness of the metal support layer 50 is equal to the total thickness of the heat sink 80 and the foam adhesive 60. The second back film 32 is attached to the metal support layer 50 and the foam adhesive 60, so that the arrangement of the above-mentioned multiple structures can be achieved in a smaller space without affecting the heat dissipation effect of the heat sink and the foam adhesive.

[0038] In some embodiments, by the above Figure 4 From the structure, we know that the bending radius R = 1 / 2 * (thickness of the first backing film + thickness of the second backing film + distance between the first backing film and the second backing film), and the bending width C is equal to the bending radius R.

[0039] According to an embodiment of the present invention, the bending radius R of the bending area is less than or equal to 0.2 mm (for example, bending radii of 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, and 0.10 mm). This effectively achieves a narrow bezel design.

[0040] According to an embodiment of the present invention, the thickness of the heat sink 80 is 0.05 to 0.15 mm (for example, the thickness of the heat sink 80 is 0.05 mm, 0.07 mm, 0.09 mm, 0.1 mm, 0.12 mm, 0.14 mm, or 0.15 mm). Thus, the heat sink 80 of the aforementioned thickness can be well positioned in a relatively small bonding space (the distance between the first back film and the second back film) while maintaining good heat dissipation performance, achieving the goal of keeping the bending radius R of the bending area less than or equal to 0.2 mm.

[0041] Furthermore, the heat sink 80 includes a layered textured adhesive, a foam adhesive layer, a graphite layer, a base layer (e.g., PET), and a copper layer. The heat sink with this structure has excellent heat dissipation capabilities. In some embodiments, to achieve a thickness of 0.05–0.15 mm for the heat sink 80, the thickness of the foam adhesive layer and the base layer can be reduced. For example, while a conventional heat sink has a thickness of 0.22 mm, in this invention, the thickness of the foam adhesive layer can be reduced from 150 micrometers to 70 micrometers, and the thickness of the base layer from 50 micrometers to 30 micrometers, thereby reducing the thickness of the heat sink from 0.22 mm to 0.12 mm.

[0042] According to an embodiment of the present invention, referring to Figure 4 In the horizontal direction, there is a gap between the metal support layer 50 and the heat sink 80, with a gap width D4 of 200–400 micrometers (e.g., 200 mm, 230 mm, 250 mm, 280 mm, 300 mm, 330 mm, 350 mm, 370 mm, or 400 mm). Therefore, when the second back film 32 is bonded to the heat sink 80 and the metal support layer 50, this gap can absorb bonding tolerances and prevent compression between the heat sink 80 and the metal support layer 50 after bonding. The metal support layer 50 can be made of materials such as stainless steel or titanium alloy.

[0043] According to an embodiment of the present invention, referring to Figure 4 The display also includes a driver IC 70, which is disposed on the surface of the bonding area S2 away from the second back film 32. The orthographic projection of the driver IC 70 on the cover plate 12 is located inside the orthographic projection of the heat sink 80 on the cover plate 12, and also inside the orthographic projection of the foam adhesive 60 on the cover plate 12. Thus, the driver IC 70 is disposed below the heat sink 80, which helps to achieve heat dissipation for the driver IC.

[0044] According to an embodiment of the present invention, referring to Figure 4 and 5 The orthographic projection of the adhesive layer 40 on the cover plate 12 overlaps with the orthographic projection of the polarizer 10 on the cover plate 12, and the adhesive layer 40 covers part of the bent section. Therefore, during bending, a crack 41 will form on the side of the adhesive layer 40 away from the display area AA. To better protect the polarizer 10 and the display panel 20, adhesive can be applied at the crack 41, forming a filling structure 91 that fills the crack 41. Thus, by applying adhesive, the crack is filled, preventing the presence of cracks, better protecting the polarizer and the display panel, and improving the impact resistance of the display screen.

[0045] According to an embodiment of the present invention, referring to Figure 5The display screen also includes a buffer adhesive 92, which is bonded to the concave surface of the bending section S-1 (i.e., the surface of the bending section near the first back film). The buffer adhesive 92 is disposed without contact with the first back film 31 and the second back film 32. Therefore, by providing the buffer adhesive 92 on the concave surface of the bending section S-1, the impact resistance of the display screen can be further improved, protecting the display panel. Simultaneously, since the buffer adhesive 92 is not in contact with the first back film 31 and the second back film 32, there is no compression between the buffer adhesive 92 and the first back film 31 or the second back film 32. Therefore, it does not affect the release of stress in the source / drain electrode layers in the display area, and the stress of the first and second back films is not transmitted to the bending section, thereby avoiding impact on the bending section. In some embodiments, refer to... Figure 5 In the direction of the bending opening of the bending segment S-1, the thickness D5 of the buffer adhesive 92 is greater than the bending width C of the bending segment. This improves the impact resistance of the display screen and protects the display panel. Furthermore, the buffer adhesive can be formed through a dispensing process, which is simple, easy to implement, and allows for accurate positioning. The buffer adhesive is an adhesive material with certain adhesive properties, so it can adhere to the concave bending surface of the bending segment S-1 without requiring additional support structures. Moreover, the adhesive material used to form the buffer adhesive is generally lightweight, such as UV adhesive, which is cured by ultraviolet light. This UV adhesive has good adhesion and is very lightweight, so the buffer adhesive will not exert significant downward force on the bending segment, thus not affecting its bending shape.

[0046] In some specific embodiments of the present invention, the structure of the display screen is as follows: Figure 4 As shown, the bending width C and bending radius R are both 0.18 mm. By detecting the traces in the source-drain electrode layer and the pixel boundary layer (PDL) in the display screen, the bending of the bending segment causes a tear rate of 8.7% on the traces in the source-drain electrode layer and a tear rate of 10.8% on the pixel boundary layer. It can be seen that the display screen structure of the present invention not only has a low tear rate on the traces in the source-drain electrode layer and the pixel boundary layer (PDL), but also can effectively achieve a narrow bezel design.

[0047] In another aspect, the present invention provides a display device. According to an embodiment of the invention, the display device includes the aforementioned display screen. Thus, the display device has a narrower bezel. Those skilled in the art will understand that this display device possesses all the features and advantages of the aforementioned display screen, which will not be elaborated upon further here.

[0048] According to embodiments of the present invention, there are no special requirements for the specific type of display device. Those skilled in the art can flexibly choose according to the actual situation. For example, it can be a display device that has display functions together with mobile phones, computers, iPads, game consoles, etc.

[0049] As those skilled in the art will understand, in addition to the aforementioned display screen, the display device also has the essential structures and components of a display device. Taking a mobile phone as an example, it may also include structural components such as a battery, CPU, camera module, audio module, and casing.

[0050] The terms "first" and "second" used in this document are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature marked "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A display screen, characterized in that, include: The display panel includes a display area and a peripheral area located on one side of the display area. In a direction away from the display area, the peripheral area includes a circuit trace area, a bending area and a bonding area arranged in sequence. The bonding area is bent to the back side of the display panel via the bending area. An adhesive layer is disposed on the light-emitting surface of the display panel; A polarizer is disposed on the surface of the adhesive layer away from the display panel; A cover plate is disposed on the side of the polarizer away from the display panel, and the orthographic projection of the edge line of the polarizer in the peripheral area on the cover plate and the orthographic projection of the outer edge line of the curved surface of the bending area on the cover plate are on the same straight line. The bending area includes interconnected bent sections and flat sections without bending. The orthographic projection of the adhesive layer on the cover plate overlaps with the orthographic projection of the polarizer on the cover plate, and the adhesive layer covers part of the bent section. The adhesive layer has a crack on its side face away from the display area, and the display panel further includes an adhesive filling structure that fills the crack.

2. The display screen according to claim 1, characterized in that, The bent section is connected to the circuit trace area, and the flat section is connected to the bonding area, further comprising: A first back film is disposed on the side of the display panel away from the polarizer. The first back film covers the display area and extends to the circuit trace area, and the first back film is disposed at intervals between the circuit trace area and the bending section. A second backing film is disposed on the side of the bonding area close to the first backing film, the second backing film covers the bonding area and extends to the flat section, and the second backing film is spaced apart from the bent section.

3. The display screen according to claim 2, characterized in that, The linear distance between the first back film and the bent section is 100~300 micrometers, and the linear distance between the second back film and the bent section is 100~300 micrometers; And / or, the straight-line spacing between the edge line of the flat section and the edge line of the flat section away from the bent section of the second backsheet is 50 to 200 micrometers.

4. The display screen according to claim 2, characterized in that, Also includes: A metal support layer is disposed on the side of the first back film near the second back film, and its orthogonal projection on the cover plate covers the display area and part of the circuit trace area; A heat sink is disposed on the surface of the first back film away from the display panel and located at one end of the metal support layer away from the display area; Foam adhesive, wherein the foam adhesive is disposed on the surface of the heat sink away from the display panel and is bonded to the second back film; A driver IC is disposed on the surface of the bonding area away from the second back film, and the orthographic projection of the driver IC on the cover plate is located inside the orthographic projection of the heat sink on the cover plate.

5. The display screen according to claim 4, characterized in that, In the horizontal direction, there is a gap between the metal support layer and the heat sink, and the width of the gap is 200~400 micrometers.

6. The display screen according to claim 4, characterized in that, The thickness of the heat sink is 0.05~0.15 mm.

7. The display screen according to any one of claims 1 to 6, characterized in that, The bending radius of the bending zone is less than or equal to 0.2 mm.

8. The display screen according to any one of claims 2 to 6, characterized in that, Also includes: A buffer adhesive is bonded to the concave surface of the bent section, and the buffer adhesive is disposed in a manner that does not contact the first back film or the second back film.

9. The display screen according to claim 8, characterized in that, In the direction in which the bend opening of the bent section faces, the thickness of the buffer adhesive is greater than the bend width of the bent section.

10. A display device, characterized in that, The display screen includes any one of claims 1 to 9.

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