Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel comprises a screen body and an impact-resistant layer. The screen body comprises a display part and a bending part. The bending part is arranged to bend away from the light-out surface of the display part. The thickness of the bending part is less than that of the display part. The impact-resistant layer is arranged in the screen body or outside the screen body. The material of the impact-resistant layer comprises a negative Poisson's ratio material, and / or the impact-resistant layer is provided with a negative Poisson's ratio material molecular structure. The application can improve the impact resistance of the display panel.

Description

Technical Field

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

[0002] Organic light-emitting diode (OLED) and flat panel display devices based on light-emitting diode (LED) technologies are widely used in various terminal products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body and wide range of applications, becoming the mainstream of display devices.

[0003] However, as consumers' aesthetic standards improve, they have placed higher demands on the thinness and lightness of the entire device. But as the thinness and lightness increase, the impact resistance of the display panel will decrease. Summary of the Invention

[0004] This application provides a display panel and a display device that can improve the impact resistance of the display panel.

[0005] The first aspect of this application provides a display panel, which includes: a screen body, including a display portion and a bent portion, the bent portion being bent toward a side away from the light-emitting surface of the display portion, wherein the thickness of the bent portion is less than the thickness of the display portion; and an impact-resistant layer, disposed in the screen body or disposed on the outside of the screen body, the material of the impact-resistant layer including a negative Poisson's ratio material, and / or the impact-resistant layer having a negative Poisson's ratio material molecular structure.

[0006] A second aspect of this application provides a display device, including the display panel in any of the above embodiments.

[0007] The beneficial effects are as follows: This application provides an impact-resistant layer in and / or on the outside of the screen body, wherein the material of the impact-resistant layer includes a negative Poisson's ratio material, and / or the impact-resistant layer has a negative Poisson's ratio material molecular structure. The above-mentioned arrangement of this application enables the screen body to resist the impact force when it is subjected to impact force by using the impact-resistant layer including a negative Poisson's ratio material, and / or the impact-resistant layer having a negative Poisson's ratio material molecular structure, thereby improving the impact resistance of the display panel. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0009] Figure 1 This is a schematic diagram of the structure of one embodiment of the display panel of this application;

[0010] Figure 2 This is a schematic diagram of one embodiment of the molecular structure of a negative Poisson's ratio material;

[0011] Figure 3 yes Figure 1 A schematic diagram of the structure of one embodiment of the cover plate;

[0012] Figure 4 yes Figure 1 A schematic diagram of another embodiment of the cover plate;

[0013] Figure 5 yes Figure 1 A schematic diagram of the structure of one embodiment when the screen is unfolded;

[0014] Figure 6 yes Figure 1 A schematic diagram of another embodiment when the screen is unfolded;

[0015] Figure 7 yes Figure 1 A schematic diagram of another embodiment when the screen is unfolded;

[0016] Figure 8 This is a schematic diagram of the structure of the display panel in the manufacturing process of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] It should be noted that the terms "first" and "second" in this application are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0019] The inventors discovered in their research that as the bending radius decreases, the thickness of the display panel becomes thinner, which leads to a decrease in the impact resistance of the display panel.

[0020] To address the aforementioned issues, this application provides a display panel and a display device, as detailed below.

[0021] See Figure 1 , Figure 1 This is a schematic diagram of the structure of one embodiment of the display panel of this application. The display panel 100 includes a screen body 10 and an impact-resistant layer 20.

[0022] The screen body 10 includes a bending portion 1 and a display portion 2. The bending portion 1 is bent away from the light-emitting surface of the display portion 2, and the thickness of the bending portion 1 is less than the thickness of the display portion 2. That is, in this embodiment, the screen body 10 located in the bending portion 1 is thinner than the screen body 10 located in the display portion 2.

[0023] Since the screen body 10 of this application is provided with a bending part 1, and the bending part 1 is bent toward the side away from the light-emitting surface of the display part 2, compared with the state where the bending part 1 is not bent, this application can effectively reduce the area occupied by the non-display part on the light-emitting surface. At the same time, since the thickness of the bending part 1 is less than the thickness of the display part 2, it is easier for the bending part 1 to be bent.

[0024] Furthermore, the bending portion 1 exhibits a certain degree of bending. The inventors discovered during their research that as the bending radius decreases, the thickness of the display panel 100 becomes thinner, which reduces the impact resistance of the display panel 100.

[0025] To improve the impact resistance of the display panel 100, this application provides an impact-resistant layer 20 in the screen body 10 and / or on the outside of the screen body 10. The material of the impact-resistant layer 20 includes a negative Poisson's ratio material, and / or the impact-resistant layer 20 has a negative Poisson's ratio material molecular structure, so as to improve the impact resistance of the display panel 100 by utilizing the good impact resistance of the negative Poisson's ratio material and / or the negative Poisson's ratio material molecular structure.

[0026] In one embodiment, the impact-resistant layer 20 is made of a negative Poisson's ratio material. When subjected to impact, the negative Poisson's ratio material becomes denser and aggregates towards the impact region, thus better achieving a shock-absorbing effect and improving impact resistance. In this embodiment, the negative Poisson's ratio material includes at least one of composite materials, porous materials, and structural materials. The composite material can be at least one of carbon fiber reinforced composite materials and glass bead-filled composite materials; the porous material can be at least one of foamed metal and polyurethane foam; and the structural material can be at least one of a thin film structure and a crystalline substance composed of metal ions and organic ligands.

[0027] In another embodiment, the impact-resistant layer 20 is provided with a negative Poisson's ratio material molecular structure, which includes at least one of the following: a concave corner structure, a chiral structure, a rigid body structure of rotation, a perforated structure, and a wrinkled structure. Of course, the negative Poisson's ratio material molecular structure in this embodiment can also be an interlocking quadrilateral structure or a staggered rib structure, etc.

[0028] The molecular structure of negative Poisson's ratio materials is a multicellular structure, consisting of multiple arrayed negative Poisson's ratio cells, each with the same size. When the molecular structure of a negative Poisson's ratio material is subjected to impact, it tends to concentrate the stress at the point of impact, making it easier to achieve larger compressive deformation and thus giving it higher energy absorption efficiency.

[0029] To facilitate understanding of the impact resistance principle of the impact-resistant layer 20 with a negative Poisson's ratio molecular structure, the following is a brief introduction to the principle using the chiral structure as an example:

[0030] Please see Figure 2 , Figure 2 This is a schematic diagram of one embodiment of the molecular structure of a negative Poisson's ratio material. The molecular structure of the negative Poisson's ratio material in this embodiment is a chiral structure. Specifically, each cell 21 consists of a centrally located circular rigid body and six tangential flexible beams. Because this structure does not overlap with the main body when mirrored, resembling the left and right hands of a human, it is called a chiral structure. When compressed laterally, the circular rigid body rotates counterclockwise due to the force of the transverse tangential beams, which in turn causes the longitudinal tangential beams to contract, achieving the negative Poisson's ratio effect. This chiral structure can achieve large deformations, and the Poisson's ratio value in all directions is -1. More chiral structures can be obtained by changing the number of tangential beams (three or four tangential beams), the shape of the central rigid body, or by replacing the flexible straight beams with wavy beams.

[0031] The impact-resistant layer 20 can be located on the outside of the screen body 10 or inside the screen body 10. When there are multiple impact-resistant layers 20, all of the multiple impact-resistant layers 20 can be located on the outside of the screen body 10 or all of them can be located inside the screen body 10, or some impact-resistant layers 20 can be located inside the screen body 10 and some impact-resistant layers 20 can be located on the outside of the screen body 10.

[0032] Furthermore, when there are multiple impact-resistant layers 20, all impact-resistant layers 20 may include negative Poisson's ratio material, all impact-resistant layers 20 may have a negative Poisson's ratio material molecular structure, or some impact-resistant layers 20 may include negative Poisson's ratio material and some impact-resistant layers 20 may have a negative Poisson's ratio material molecular structure.

[0033] In one implementation, such as Figure 1As shown, the impact-resistant layer 20 is disposed on the outside of the screen body 10. The outside of the screen body 10 is the first part to come into contact with the force, so the impact-resistant layer 20 is disposed on the outside of the screen body 10 to resist the impact from the beginning of the force application, so as to protect the entire screen body 10.

[0034] Continue reading Figure 1 In some embodiments, the display panel 100 further includes a cover plate 30 disposed on the light-emitting surface side of the screen body 10, and an impact-resistant layer 20 disposed in the cover plate 30. Specifically, the cover plate 30 is the component of the display panel 100 that is first subjected to impact, so disposing of the impact-resistant layer 20 in the cover plate 30 can further improve the impact resistance of the display panel 100.

[0035] In one embodiment, the impact-resistant layer 20 has a negative Poisson's ratio material molecular structure, and the cover plate 30 is reused as the impact-resistant layer 20 (see [link]). Figure 1 In this embodiment, the impact-resistant layer 20 is the cover plate 30, and the cover plate 30 itself has a negative Poisson's ratio material molecular structure.

[0036] In one embodiment, the display panel 100 further includes a polarizer 40, and the cover plate 30 and the polarizer 40 are bonded together by a bonding adhesive layer 50, wherein the material of the bonding adhesive layer 50 is, for example, transparent optical adhesive OCA.

[0037] See Figure 3 In one embodiment, the material of the impact-resistant layer 20 includes a negative Poisson's ratio material, and the cover plate 30 includes a cover plate body 35 and an impact-resistant layer 20 disposed on the side of the cover plate body 35 opposite to the screen body 10. During the manufacturing process, a negative Poisson's ratio material coating is formed on the side of the cover plate body 35 opposite to the screen body 10, and this coating is the impact-resistant layer 20.

[0038] The cover plate body 35 can be a single-layer structure (such as...). Figure 3 (As shown), it can also be a stacked structure. For example, when the display panel 100 is applied to a straight-board machine, the cover plate body 35 is a single-layer structure, while when the display panel 100 is applied to a folding machine, considering the mechanical performance, the cover plate body 35 is a stacked structure.

[0039] For example, in one alternative implementation, see Figure 4 The cover plate body 35 has a stacked structure, comprising a first sub-body 351, an adhesive layer 352, and a second sub-body 353 stacked sequentially. An impact-resistant layer 20 is disposed on the side of the first sub-body 351 facing away from the second sub-body 353. The adhesive layer 352 is used to bond the first sub-body 351 and the second sub-body 353 together, and its material can be transparent optical adhesive (OCA). The structures of the first sub-body 351 and the second sub-body 353 can be the same or different; no restrictions are placed here.

[0040] To further improve the impact resistance of the cover plate 30, in another optional embodiment, at least one of the first sub-body 351 and the second sub-body 353 may be made of a material with a negative Poisson's ratio. That is, when preparing the first sub-body 351 and the second sub-body 353, at least one of the first sub-body 351 and the second sub-body 353 may be made using a negative Poisson's ratio material, and / or, a negative Poisson's ratio material may be coated on one side of the first sub-body 351 and the second sub-body 353 to form a negative Poisson's ratio material coating, for example, forming a negative Poisson's ratio material coating on the side of the second sub-body 353 opposite to the first sub-body 351. Alternatively, at least one of the first sub-body 351 and the second sub-body 353 may have a negative Poisson's ratio material molecular structure.

[0041] In one specific embodiment, the material of the first sub-body 351 includes transparent polyimide (CPI, Colorless Polyimide), and the material of the second sub-body 353 includes a negative Poisson's ratio material. In another specific embodiment, the material of the first sub-body 351 includes a negative Poisson's ratio material, and the material of the second sub-body 353 includes ultra-thin glass (UTG, Ultra Thin Glass), for example, specifically Asahi Glass.

[0042] In some embodiments, please refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of an embodiment of the screen body when unfolded according to this application. The screen body 10 also includes a substrate 3, an array layer 4, and a light-emitting layer 5. The array layer 4 is disposed on one side of the substrate 3 and is located at least in the display section 2. The light-emitting layer 5 is disposed on the side of the array layer 4 away from the substrate 3 and is located at least in the display section 2. The thickness of the bending section 1 is less than the thickness of the display section 2 by thinning at least one of the substrate 3 and the array layer 4 located in the bending section 1.

[0043] The substrate 3 serves as a support in the display panel 100. The substrate 3 can be flexible, thus it can be stretched, folded, bent, or rolled, thereby making the display panel 100 stretchable, foldable, bendable, or rollable. The substrate 3 can be a single-layer structure or a multi-layer structure.

[0044] Array layer 4 includes a pixel driving circuit 41, which includes a transistor 411 and a storage capacitor 412. Transistor 411 includes a semiconductor portion, a gate, a source, and a drain. Capacitor 412 includes a first electrode and a second electrode. The gate and the first electrode may be located in a first metal trace layer 401, the second electrode may be located in a second metal trace layer 402, and the source and drain may be located in a third metal trace layer 403. Interlayer insulating layers are provided between the first metal trace layer 401 and the second metal trace layer 402, and between the second metal trace layer 402 and the third metal trace layer 403. The array layer 4 may also include a fourth metal trace layer 404, which has signal lines electrically connected to the pixel driving circuit 41 and the light-emitting element 51 in the light-emitting layer 5. A first planarization layer 405 is provided between the fourth metal trace layer 404 and the third metal trace layer 403, and a second planarization layer 406 is provided between the fourth metal trace layer 404 and the light-emitting layer 5. The first planarization layer 405 and the second planarization layer 406 are used for planarization to ensure the flatness of the display panel 100. The pixel driving circuit 41 may be, for example, a 2T1C circuit, a 7T1C circuit, a 7T2C circuit, or a 9T1C circuit, etc., and this application does not limit its specific structure. "2T1C circuit" refers to a pixel circuit that includes two thin-film transistors (T) and one capacitor (C), and so on for "7T1C circuit," "7T2C circuit," "9T1C circuit," etc. It is understood that the materials of the interlayer insulating layer, the first planarization layer 405, and the second planarization layer 406 mentioned above are all insulating materials. Therefore, the interlayer insulating layer, the first planarization layer 405, and the second planarization layer 406 are all defined as insulating layer 4B in array layer 4. Meanwhile, the first metal trace layer 401, the second metal trace layer 402, the third metal trace layer 403, and the fourth metal trace layer 404 are all defined as metal trace layer 4A in array layer 4. The material of insulating layer 4B includes organic adhesive.

[0045] The light-emitting layer 5 includes light-emitting elements 51. The number of light-emitting elements 51 can be one or more. When there are multiple light-emitting elements 51, some emit red light, some emit green light, and some emit blue light. It should be noted that the color of light emitted by the light-emitting elements 51 is not limited to red, green, or blue; it can also be yellow or other colors, and there is no limitation here. Simultaneously, the light-emitting element 51 includes a first electrode, a light-emitting material layer, and a second electrode sequentially stacked in the direction away from the substrate 3.

[0046] In one embodiment, when the impact-resistant layer 20 has a negative Poisson's ratio material molecular structure, the array layer 4, the light-emitting layer 5, or the polarizer 40 can also be reused as the impact-resistant layer 20.

[0047] In one embodiment, when the material of the impact-resistant layer 20 includes a negative Poisson's ratio material, the impact-resistant layer 20 may also be formed on one side surface of the array layer 4, the light-emitting layer 5, or the polarizer 40.

[0048] The screen body 10 also includes a buffer part 12 located between the display part 2 and the bending part 1. The buffer part 12 is thinned to buffer the bending of the bending part 1.

[0049] In this configuration, a portion of the insulating layer 4B in the array layer 4 extends from the display section 2 into the bending section 1, and a portion of the metal trace layer 4A also extends from the display section 2 into the bending section 1 to form the metal traces in the bending section 1. For example, the fourth metal trace layer 404 described above extends from the display section 2 into the bending section 1, while the first planarization layer 405 and the second planarization layer 406 also extend from the display section 2 into the bending section 1.

[0050] See Figure 6 In some embodiments, the thickness of the bending portion 1 can be made smaller than the thickness of the display portion 2 by thinning the substrate 3 located in the bending portion 1.

[0051] In one application scenario, please refer to Figure 6 The substrate 3 is a single-layer structure, and the thickness of the substrate 3 located in the bending portion 1 is less than the thickness of the substrate 3 located in the display portion 2.

[0052] In another application scenario, please refer to Figure 7 , Figure 7 yes Figure 5 A schematic diagram of another embodiment after thinning the middle substrate. (See diagram below.) Figure 7 As shown, substrate 3 has a stacked structure. Specifically, substrate 3 includes a first sub-substrate 31, a buffer sub-layer 32, and a second sub-substrate 33 stacked sequentially. The array layer 4 is disposed on the side of the second sub-substrate 33 facing away from the first sub-substrate 31. The thickness of the first sub-substrate 31 in the bending portion 1 is less than the thickness of the first sub-substrate 31 in the display portion 2. That is, in this application scenario, only the thickness of the first sub-substrate 31 in the bending portion 1 is reduced.

[0053] Please continue reading. Figure 7The first sub-substrate 31 has a groove 34 on its surface opposite to the second sub-substrate 33 located in the bending portion 1. In one embodiment, the thickness of the first sub-substrate 31 in the bending portion 1 can be reduced using laser cutting. The laser can be, but is not limited to, a gas laser, such as a CO2 laser, or a solid-state laser, such as one generated using crystals or glass. In another embodiment, the thickness of the first sub-substrate 31 in the bending portion 1 can be reduced by adding sacrificial layers of varying thicknesses. For example, sacrificial layers of varying thicknesses are added between the glass substrate and the first sub-substrate 31. Since the sacrificial layers need to be peeled off later, a thicker sacrificial layer can be added to the bending portion 1, and a thinner sacrificial layer or no sacrificial layer can be added to the display portion 2. After the sacrificial layer fails and peels off, a groove 34 is formed on the surface of the first sub-substrate 31 in the bending portion 1 opposite to the second sub-substrate 33. The specific size and position of the groove 34 depend on the added sacrificial layers of varying thicknesses.

[0054] Specifically, please refer to Figure 8 , Figure 8 This is a schematic diagram of the structure of the display panel in the manufacturing process of this application. Figure 8 As shown, in the fabrication process, a glass substrate 6 is first placed, and then a sacrificial layer 7 with different gradient thicknesses is deposited on top of the glass substrate 6. To reduce the thickness of the first sub-substrate 31 or substrate 3 located at the bending portion 1, a thicker sacrificial material can be deposited at the bending portion 1, while no sacrificial material or a thinner sacrificial material is deposited at the display portion 2, ultimately forming sacrificial layers 7 with different gradient thicknesses. Then, the first sub-substrate 31 or substrate 3 is disposed on the upper surface of the sacrificial layer 7. The upper surfaces of the first sub-substrate 31 or substrate 3 (the surface of the first sub-substrate 31 or substrate 3 on the side away from the sacrificial layer) of the display portion 2 and the bending portion 1 are horizontal. Because the sacrificial layer 7 exhibits different gradient thicknesses, the first sub-substrate 31 or substrate 3 also correspondingly exhibits different gradient thicknesses. Specifically, the substrate 3 located at the bending portion 1 is thinner than the substrate 3 located at the display portion 2 (e.g., ...). Figure 6 (as shown), or the first sub-substrate 31 located in the bending portion 1 is thinner than the first sub-substrate 31 located in the display portion 2 (as shown). Figure 7 As shown in the figure, after depositing each film layer, the sacrificial layer can be rendered ineffective by laser irradiation, thereby peeling off the glass substrate 6 and the sacrificial layer 7, ultimately forming a substrate 3 or a first sub-substrate 31 with different gradient thicknesses. The material of the sacrificial layer 7 may include A-Si, and this application does not limit the material.

[0055] In one specific embodiment, the thickness of the first sub-substrate 31 located in the display section 2 is 10 μm, and the thickness of the first sub-substrate 31 located in the bending section 1 is less than 5 μm. Finally, the bending radius after bending in the bending section 1 can reach 0.1 mm.

[0056] It should be noted that during the bending process, the outer layer of the screen 10 located at the bending section 1 is stretched, and the inner layer is compressed. Therefore, there must be a transition layer on its cross-section that is neither stretched nor compressed, with stress almost zero. This transition layer is called the neutral layer of the material. The length of the neutral layer remains unchanged during the bending process, the same as before bending.

[0057] The neutral layer refers to the material layer located in the middle of the bending section 1 of the display panel in the thickness direction. In order to make the metal trace layer 4A located in the bending section a neutral layer, the thickness of the material on both sides of the metal trace layer can be adjusted so that the metal trace layer located in the bending section 1 is neither stretched nor compressed during the bending process.

[0058] In one embodiment, in order to make the metal trace layer 4A of the bend portion a neutral layer, the thickness of the material layer located on both sides of the metal trace layer 4A in the bend portion can be appropriately reduced to reduce the stress borne by the metal trace layer 4A in the bend portion 1.

[0059] In one specific embodiment, the insulating layer 4B located at the bend 1 and between the metal trace layer and the substrate 3 is thinned so that the metal trace layer 4A located at the bend 1 is in a neutral layer. For example, please refer to Figure 5 The first planarization layer 405 below the fourth metal trace layer 404 in the bending section 1 is thinned.

[0060] Optionally, during the preparation process, an insulating layer 4B can be formed on the entire surface first. Then, the portion outside the bent portion 1 can be shielded by a dummy shot, and the bent portion 1 can be exposed with yellow light to finally form a thinner insulating layer 4B on the bent portion 1.

[0061] Continue reading Figure 1 In some embodiments, in order to improve the bending resistance, the display panel 100 further includes a bending layer 8, which is disposed on the side of the bending portion 1 away from the display portion 2.

[0062] The bending-resistant layer 8 is made of at least one of the following: UV-curable adhesive, inkjet-printed organic material, and transparent polymer material. The inkjet-printed organic material can be an organic IJP material, and the transparent polymer material can be a self-healing material, including transparent polymer materials that self-heal using hydrogen bonds or nitrile radicals, and transparent polymer materials that self-heal using the Diels-Alder reaction. The bending-resistant layer can be formed through inkjet printing, followed by curing, or it can be formed through coating methods such as Slit; no specific limitations are specified here.

[0063] Please continue reading. Figure 1 The screen body 10 also includes a bonding part 9 disposed opposite to the display part 2, and the bending part 1 connects the display part 2 and the bonding part 9.

[0064] Please continue reading. Figure 1 In one embodiment, the display panel 100 further includes a first protective layer 91, a second protective layer 92, a composite adhesive tape 93, and a shim 94. The first protective layer 91 is disposed on the side of the bonding portion 9 facing the display portion 2; the second protective layer 92 is disposed on the side of the display portion 2 facing the bonding portion 9 and is located between the display portion 2 and the first protective layer 91; the composite adhesive tape 93 is disposed between the first protective layer 91 and the second protective layer 92; and the shim 94 is disposed between the composite adhesive tape 93 and the first protective layer 91.

[0065] In order to further reduce the thickness of the entire display panel 100 and ensure the performance of the display panel 100, the total thickness of the first protective layer 91 and the second protective layer 92 can be set to 40-75 micrometers, the thickness of the composite tape 93 can be set to 90-130 micrometers, and the material of the composite tape 93 includes at least one of composite foam, silicone gel and copper foil, wherein preferably the material of the composite tape 93 includes silicone gel and copper foil; furthermore, the thickness of the shim block 94 is set to 25-35 micrometers.

[0066] In one embodiment, to achieve a bending radius of 0.1 mm for the bending portion 1, the thicknesses of the first protective layer 91 and the second protective layer 92 are respectively 35 micrometers, the thickness of the composite tape 93 is 100 micrometers, and the material includes silicone gel and copper foil, and the thickness of the shim block 94 is 30 micrometers.

[0067] In another embodiment, in order to make the bending radius of the bending part 1 reach 0.1 mm, the first protective layer 91 can be removed, the thickness of the second protective layer 92 is set to 50 micrometers, the thickness of the composite tape 93 is set to 120 micrometers, the material includes silicone gel and copper foil, and the thickness of the shim block 94 is set to 30 micrometers.

[0068] This application also provides a display device, including the display panel 100 in any embodiment. The display device can be a mobile phone, tablet, wearable device, etc.

[0069] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A display panel, characterized by, The display panel includes: The screen body includes a display section and a bending section, wherein the bending section is bent toward a side away from the light-emitting surface of the display section, and the thickness of the bending section is less than the thickness of the display section; A first impact-resistant layer, an array layer disposed in the screen body, the first impact-resistant layer having a negative Poisson's ratio material molecular structure, and the array layer being reused as the first impact-resistant layer; The array layer is located in the display section and the bending section; the thickness of the array layer in the bending section is less than the thickness of the array layer in the display section.

2. The display panel according to claim 1, characterized in that, The display panel also includes: The second impact-resistant layer is made of a material with a negative Poisson's ratio, and / or the second impact-resistant layer is provided with a molecular structure of a negative Poisson's ratio material; A cover plate is disposed on one side of the light-emitting surface of the screen, and the second impact-resistant layer is disposed in the cover plate.

3. The display panel according to claim 2, characterized in that, The second impact-resistant layer has a negative Poisson's ratio material molecular structure, and the cover plate is reused as the second impact-resistant layer.

4. The display panel according to claim 2, characterized in that, The material of the second impact-resistant layer includes a negative Poisson's ratio material, and the cover plate includes a cover plate body and the second impact-resistant layer disposed on the side of the cover plate body opposite to the screen body.

5. The display panel according to claim 4, characterized in that, The cover plate body includes a first sub-body, an adhesive layer, and a second sub-body stacked in sequence, and the second impact-resistant layer is disposed on the side of the first sub-body away from the second sub-body.

6. The display panel according to claim 5, characterized in that, The material of at least one of the first subbody and the second subbody includes a negative Poisson's ratio material.

7. The display panel according to claim 5, characterized in that, The material of the first subbody includes transparent polyimide, and the material of the second subbody includes a negative Poisson's ratio material.

8. The display panel according to claim 5, characterized in that, The material of the first subbody includes a negative Poisson's ratio material, and the material of the second subbody includes ultrathin glass.

9. The display panel according to claim 2, characterized in that, The material of the second impact-resistant layer includes a negative Poisson's ratio material, which includes at least one of composite materials, porous materials, and structural materials.

10. The display panel according to claim 9, characterized in that, The composite material includes at least one of carbon fiber reinforced composite material and glass sphere filled composite material; And / or, the porous material includes at least one of foamed metal and polyurethane foam; And / or, the structural material includes at least one of a thin film structure and a crystalline substance composed of metal ions and organic ligands.

11. The display panel according to claim 1, characterized in that, The molecular structure of the negative Poisson's ratio material includes at least one of the following: concave structure, chiral structure, rigid body of rotation structure, perforated structure, and folded structure.

12. The display panel according to claim 1, characterized in that, The screen also includes: The thickness of the substrate located at the bending portion is less than the thickness of the substrate located at the display portion; An array layer is disposed on one side of the substrate; A light-emitting layer is disposed on the side of the array layer opposite to the substrate and is located at least in the display section.

13. The display panel according to claim 12, characterized in that, The substrate includes a first sub-substrate, a buffer sub-layer, and a second sub-substrate stacked sequentially. The array layer is disposed on the side of the second sub-substrate opposite to the first sub-substrate. The thickness of the first sub-substrate in the bending portion is less than the thickness of the first sub-substrate in the display portion.

14. The display panel according to claim 13, characterized in that, The surface of the first sub-substrate opposite to the second sub-substrate has a groove located at the bend.

15. The display panel according to claim 12, characterized in that, The array layer includes: An insulating layer is provided in the display portion and the bent portion; A metal trace layer is disposed on the side of the insulating layer away from the substrate, and is located in the display portion and the bending portion; The thickness of the insulating layer in the bent portion is less than the thickness of the insulating layer in the display portion.

16. The display panel according to claim 15, characterized in that, The insulating layer is made of organic adhesive.

17. The display panel according to claim 1, characterized in that, The display panel also includes: An anti-bending layer is disposed on the side of the bending portion away from the display portion.

18. The display panel according to claim 17, characterized in that, The material of the bending-resistant layer includes at least one of ultraviolet-curable adhesive, inkjet-printed organic material, and transparent polymer material.

19. The display panel according to claim 1, characterized in that, The screen body further includes a bonding portion, which is disposed opposite to the display portion, and the bending portion connects the display portion and the bonding portion.

20. The display panel according to claim 19, characterized in that, The display panel further includes: A first protective layer is disposed on the side of the bonding portion facing the display portion; A second protective layer is disposed on the side of the display portion facing the bonding portion and located between the display portion and the first protective layer; A composite tape is disposed between the first protective layer and the second protective layer; A shim is placed between the composite tape and the first protective layer.

21. A display device, characterized in that, Includes the display panel described in any one of claims 1-20.

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