Display panel and display device

Abstract

The invention discloses a display panel and a display device, the display panel comprises a screen body and an anti-impact layer, the screen body comprises a display part and a bending part, the bending part is bent towards one side, deviating from a light emitting surface of the display part, of the display part, and the thickness of the bending part is smaller than that of the display part; the anti-impact layer is arranged in the screen body or arranged outside the screen body, the material of the anti-impact layer comprises a negative Poisson's ratio material, and / or the anti-impact layer is provided with a negative Poisson's ratio material molecular structure. According to the scheme, the shock resistance of the display panel can be improved.

Description

Technical Field

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

[0002] Organic Light Emitting Display (OLED) and flat-panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various terminal products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] However, as consumers' aesthetic tastes improve, they have higher requirements for the thinness and lightness of the entire machine. However, as the thinness increases, the impact resistance of the display panel will decrease. Summary of the invention

[0004] The present application provides a display panel and a display device, which can improve the impact resistance of the display panel.

[0005] A first aspect of an embodiment of the present application provides a display panel, which includes: a screen body, including a display portion and a bending portion, the bending portion being bent toward a side away from a light emitting surface of the display portion, wherein a thickness of the bending portion is less than a thickness of the display portion; an anti-impact layer, arranged in the screen body or outside the screen body, the material of the anti-impact layer including a negative Poisson's ratio material, and / or the anti-impact layer is provided with a molecular structure of a negative Poisson's ratio material.

[0006] A second aspect of an embodiment of the present application provides a display device, comprising a display panel in any one of the above-mentioned implementations.

[0007] The beneficial effect is: the present application sets an impact-resistant layer in the screen body and / or outside the screen body, wherein the material of the impact-resistant layer includes a negative Poisson's ratio material, and / or the impact-resistant layer is provided with a negative Poisson's ratio material molecular structure. The above-mentioned setting of the present application enables the screen body to utilize the impact-resistant layer including the negative Poisson's ratio material and / or the impact-resistant layer with a negative Poisson's ratio material molecular structure to resist the impact force when it is subjected to impact force, thereby improving the impact resistance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0009] Figure 1 It is a schematic structural diagram of an embodiment of a display panel of the present application;

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

[0011] Figure 3 yes Figure 1 A structural schematic diagram of an implementation scheme of a cover plate in FIG.

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

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

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

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

[0016] Figure 8 It is a schematic diagram of the structure of the display panel of the present application during the preparation process. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] It should be noted that the terms "first" and "second" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

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

[0020] In response to the above problems, the present application provides a display panel and a display device, as shown below.

[0021] See also Figure 1 , Figure 1 1 is a schematic structural diagram of an embodiment of a display panel of the present application. The display panel 100 includes a screen body 10 and an anti-impact layer 20 .

[0022] The screen body 10 includes a bending portion 1 and a display portion 2. The bending portion 1 is bent toward a side 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 the present application is provided with a bending portion 1, and the bending portion 1 is bent toward the side of the light-emitting surface away from the display portion 2, compared with the state where the bending portion 1 is not bent, the present application can effectively reduce the area occupied by the non-display portion on the light-emitting surface. At the same time, since the thickness of the bending portion 1 is less than the thickness of the display portion 2, the bending portion 1 can be easily bent.

[0024] Furthermore, the bending portion 1 is bent to a certain extent. The inventors have found in their research that as the bending radius decreases, the thickness of the display panel 100 becomes thinner, and the thinning of the display panel 100 will reduce the impact resistance of the display panel 100.

[0025] In order to improve the impact resistance of the display panel 100, the present application sets an impact-resistant layer 20 in the screen body 10 and / or outside 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 is provided with a negative Poisson's ratio material molecular structure, so as to utilize the negative Poisson's ratio material and / or utilize the good impact resistance of the negative Poisson's ratio material molecular structure to improve the impact resistance of the display panel 100.

[0026] In one embodiment, the material of the impact-resistant layer 20 includes a negative Poisson's ratio material. When the negative Poisson's ratio material is impacted, the material gathers toward the impact area and becomes more dense, thereby better achieving the force buffering effect and improving the impact resistance. In this embodiment, the negative Poisson's ratio material includes at least one of a composite material, a porous material and a structural material. The composite material may be at least one of a carbon fiber reinforced composite material and a glass ball filled composite material, the porous material may be at least one of a foam metal and a polyurethane foam material; the structural material may be at least one of a film structure and a crystalline material 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, and the negative Poisson's ratio material molecular structure includes at least one of a concave angle structure, a chiral structure, a rotational rigid body structure, a perforated structure, and a pleated 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] Among them, the molecular structure of the negative Poisson's ratio material is a multi-cellular structure, including multiple array-arranged negative Poisson's ratio cells, and each negative Poisson's ratio cell structure has the same size. When the molecular structure of the negative Poisson's ratio material is impacted, it will gather to the concentrated force location, making it easier to achieve a larger compression deformation, making it have a higher energy absorption efficiency.

[0029] In order to facilitate understanding of the principle of how the impact-resistant layer 20 provided with the molecular structure of the negative Poisson's ratio material realizes impact resistance, the implementation principle is briefly introduced below by taking the chiral structure as an example:

[0030] See also Figure 2 , Figure 2 It is a schematic diagram of an embodiment of a 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 is composed of a circular rigid body located in the center and 6 flexible beams tangent thereto. Since the structure does not overlap with the main body after mirroring, it is similar to the left and right hands of a human being, so it is called a chiral structure. When compressed laterally, the circular rigid body rotates counterclockwise due to the force of the transverse tangential beam, thereby driving the longitudinal tangential beam to contract to achieve a negative Poisson's ratio effect. This chiral structure can achieve a large deformation, and the Poisson's ratio value in each direction is -1. Among them, more chiral structures can be obtained by changing the number of tangential beams (three tangential beams and four tangential beams), the shape of the central rigid body, or replacing the flexible straight beam with a wavy beam.

[0031] Among them, the impact-resistant layer 20 can be arranged on the outside of the screen body 10, or it can be arranged in the screen body 10. When there are multiple impact-resistant layers 20, the multiple impact-resistant layers 20 can be located outside the screen body 10, or they can be located inside the screen body 10. Or it can also be that: some impact-resistant layers 20 are located inside the screen body 10, and some impact-resistant layers 20 are located outside the screen body 10.

[0032] When there are multiple impact-resistant layers 20, all impact-resistant layers 20 may include negative Poisson's ratio materials, or all impact-resistant layers 20 may be provided with negative Poisson's ratio material molecular structures, or some impact-resistant layers 20 may include negative Poisson's ratio materials, and some impact-resistant layers 20 may be provided with negative Poisson's ratio material molecular structures.

[0033] In one embodiment, if Figure 1As shown, the impact-resistant layer 20 is disposed outside the screen body 10. The outside of the screen body 10 is the first part to be exposed to force, so the impact-resistant layer 20 is disposed outside the screen body 10 to resist impact from the beginning of force exposure, 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, which is disposed on the light-emitting surface of the screen body 10, and the anti-impact layer 20 is disposed in the cover plate 30. Specifically, the cover plate 30 is the first component of the display panel 100 to be impacted, so the anti-impact layer 20 is disposed in the cover plate 30, which can further improve the anti-impact performance 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 Figure 1 ), that is, in this embodiment, the impact-resistant layer 20 is the cover plate 30, and the cover plate 30 itself has a molecular structure of a material with a negative Poisson's ratio.

[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 via a connecting adhesive layer 50 , wherein the material of the connecting adhesive layer 50 is, for example, transparent optical adhesive OCA.

[0037] See also 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 a side of the cover plate body 35 away from the screen body 10. In this case, during the preparation process, a negative Poisson's ratio material coating is formed on the side of the cover plate body 35 away from the screen body 10, and the coating is the impact-resistant layer 20.

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

[0039] For example, in an alternative embodiment, see Figure 4 The cover body 35 is a laminated structure. In this case, the cover body 35 includes a first sub-body 351, a glue layer 352, and a second sub-body 353 that are stacked in sequence. The impact-resistant layer 20 is arranged on the side of the first sub-body 351 away from the second sub-body 353. The glue 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, and there is no limitation here.

[0040] In order to further improve the impact resistance of the cover plate 30, in another optional embodiment, the material of at least one of the first sub-body 351 and the second sub-body 353 may include a negative Poisson's ratio material. 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 of 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, a negative Poisson's ratio material coating is formed on the side of the second sub-body 353 away from the first sub-body 351. Alternatively, at least one of the first sub-body 351 and the second sub-body 353 may be provided with 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 1 is a schematic diagram of the structure of an embodiment of the screen body of the present application when it is unfolded. The screen body 10 also includes a substrate 3, an array layer 4 and a light-emitting layer 5. The array layer 4 is arranged on one side of the substrate 3 and at least located at the display part 2, and the light-emitting layer 5 is arranged on the side of the array layer 4 away from the substrate 3 and at least located at the display part 2. The thickness of the above-mentioned bending part 1 is smaller than the thickness of the display part 2 by thinning at least one layer of the substrate 3 and the array layer 4 located at the bending part 1.

[0043] The substrate 3 plays a supporting role in the display panel 100, wherein the substrate 3 may be flexible, and thus may be stretchable, foldable, bendable or rollable, thereby making the display panel 100 stretchable, foldable, bendable or rollable. The substrate 3 may be a single-layer structure or a laminated structure.

[0044] The array layer 4 includes a pixel driving circuit 41, and the pixel driving circuit 41 includes a transistor 411 and a storage capacitor 412. The transistor 411 includes a semiconductor portion, a gate, a source and a drain. The capacitor 412 includes a first electrode and a second electrode. Among them, the gate and the first electrode can be located in the first metal wiring layer 401, the second electrode can be located in the second metal wiring layer 402, and the source and the drain can be located in the third metal wiring layer 403. An interlayer insulating layer is provided between the first metal wiring layer 401 and the second metal wiring layer 402, and between the second metal wiring layer 402 and the third metal wiring layer 403. At the same time, the array layer 4 may also include a fourth metal wiring layer 404, the fourth metal wiring layer 404 is provided with a signal line, the signal line electrically connects the pixel driving circuit 41 and the light-emitting element 51 in the light-emitting layer 5, wherein a first planarization layer 405 is further provided between the fourth metal wiring layer 404 and the third metal wiring layer 403, and a second planarization layer 406 is further provided between the fourth metal wiring layer 404 and the light-emitting layer 5, and 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, and the present application does not limit its specific structure. The "2T1C circuit" refers to a pixel circuit including two thin film transistors (T) and one capacitor (C) in the pixel circuit, and other "7T1C circuits", "7T2C circuits", "9T1C circuits" and the like are analogous. It can be understood that the materials of the above-mentioned interlayer insulating layer, the first planarization layer 405, and the second planarization layer 406 are all insulating materials, so the above-mentioned interlayer insulating layer, the first planarization layer 405, and the second planarization layer 406 are all defined as the insulating layer 4B in the array layer 4. At the same time, the first metal wiring layer 401, the second metal wiring layer 402, the third metal wiring layer 403, and the fourth metal wiring layer 404 are all defined as the metal wiring layer 4A in the array layer 4. Among them, the material of the insulating layer 4B includes organic glue.

[0045] The light-emitting layer 5 includes a light-emitting element 51. The number of the light-emitting element 51 can be one or more. When the number of the light-emitting element 51 is more than one, the light-emitting color of some light-emitting elements 51 is red, the light-emitting color of some light-emitting elements 51 is green, and the light-emitting color of some light-emitting elements 51 is blue. It should be noted that the color of the light emitted by the light-emitting element 51 is not limited to red, green, and blue, and can also be yellow or other colors, which are not limited here. At the same time, the light-emitting element 51 includes a first electrode, a light-emitting material layer, and a second electrode stacked in sequence in a direction away from the substrate 3.

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

[0047] In one embodiment, when the material of the anti-shock layer 20 includes a negative Poisson's ratio material, the anti-shock 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 further includes a buffer portion 12 located between the display portion 2 and the bending portion 1 , wherein the buffer portion 12 is thinned to buffer the bending of the bending portion 1 .

[0049] Part of the insulating layer 4B in the array layer 4 extends from the display portion 2 to the bending portion 1, and part of the metal wiring layer 4A also extends from the display portion 2 to the bending portion 1, so as to form metal wiring in the bending portion 1. For example, the fourth metal wiring layer 404 extends from the display portion 2 to the bending portion 1, and at the same time, the first planarization layer 405 and the second planarization layer 406 also extend from the display portion 2 to the bending portion 1.

[0050] See also 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 at the bending portion 1 .

[0051] In one application scenario, see Figure 6 The substrate 3 is a single-layer structure, and the thickness of the substrate 3 located at the bending portion 1 is smaller than the thickness of the substrate 3 located at the display portion 2.

[0052] In another application scenario, see Figure 7 , Figure 7 yes Figure 5 A schematic diagram of another embodiment of the structure after the substrate is thinned. Figure 7 As shown, the substrate 3 is a laminated structure. Specifically, the substrate 3 includes a first sub-substrate 31, a buffer sub-layer 32, and a second sub-substrate 33 which are stacked in sequence. The array layer 4 is arranged on the side of the second sub-substrate 33 away from the first sub-substrate 31, wherein 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 thinned.

[0053] Please continue reading Figure 7, a groove 34 located at the bending portion 1 is provided on the surface of the first sub-substrate 31 facing away from the second sub-substrate 33. In one embodiment, the thickness of the first sub-substrate 31 located in the bending portion 1 can be thinned by laser cutting. Among them, the type of laser can be but not limited to a gas laser, such as a CO2 laser, and can also be a solid laser, such as a laser generated by a crystal or glass. In another embodiment, the thickness of the first sub-substrate 31 located in the bending portion 1 can also be thinned by adding a sacrificial layer with different gradient thicknesses. Exemplarily, a sacrificial layer with different gradient thicknesses is added between the glass substrate and the first sub-substrate 31. Since the sacrificial layer needs 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, so that after the sacrificial layer fails and peels off, a groove 34 is formed on the surface of the first sub-substrate 31 located in the bending portion 1 facing away from the second sub-substrate 33. The size and position of the specific groove 34 are related to the sacrificial layer with different gradient thicknesses added.

[0054] Specifically, see Figure 8 , Figure 8 Schematic diagram of the structure of the display panel during the preparation process of the present application. Figure 8 As shown, during the preparation process, a glass substrate 6 is first placed, and then a sacrificial layer 7 with different gradient thicknesses is deposited on the glass substrate 6, wherein, in order 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 on the bending portion 1, and no sacrificial material is deposited or a thinner sacrificial material is deposited on the display portion 2, so as to finally form a sacrificial layer 7 with different gradient thicknesses, and then a first sub-substrate 31 or substrate 3 is arranged on the upper surface of the sacrificial layer 7, wherein the upper surfaces of the first sub-substrate 31 or substrate 3 of the display portion 2 and the bending portion 1 (the surface of the first sub-substrate 31 or substrate 3 on the side away from the sacrificial layer) are level. Since the sacrificial layer 7 presents different gradient thicknesses, the first sub-substrate 31 or substrate 3 also presents different gradient thicknesses accordingly. Specifically, the substrate 3 located at the bending portion 1 is thinner than the substrate 3 located at the display portion 2 (such as Figure 6 ), or the first sub-substrate 31 located at the bending portion 1 is thinner than the first sub-substrate 31 located at the display portion 2 (as shown in Figure 7 As shown in the figure, after depositing the above film layers, laser irradiation can be used to invalidate the sacrificial layer, and then the glass substrate 6 and the sacrificial layer 7 can be peeled off, and finally a substrate 3 or a first sub-substrate 31 with different gradient thicknesses is formed. The material of the sacrificial layer 7 may include A-Si, and the present application does not limit the material thereof.

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

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

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

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

[0059] In a specific embodiment, the insulating layer 4B located at the bending portion 1 and between the metal wiring layer and the substrate 3 is thinned so that the metal wiring layer 4A located at the bending portion 1 is in the neutral layer. Figure 5 , the first planarization layer 405 below the fourth metal wiring layer 404 in the bending portion 1 is thinned.

[0060] Optionally, during the preparation process, the insulating layer 4B may be formed on the entire surface first, and then the portion outside the bending portion 1 may be shielded by a dummy shot, the bending portion 1 may be exposed to yellow light, and finally a thinner insulating layer 4B may be formed on the bending portion 1.

[0061] Continue reading Figure 1 In some embodiments, in order to improve the anti-bending performance, the display panel 100 further includes an anti-bending layer 8 , and the anti-bending layer 8 is arranged on the side of the bending portion 1 away from the display portion 2 .

[0062] The material of the anti-bending layer 8 includes at least one of ultraviolet curing glue, inkjet printing organic material and transparent polymer material. The inkjet printing organic material can be an organic IJP material, and the transparent polymer material can be a self-healing material, including a transparent polymer material that self-heals using hydrogen bonds or nitroxide free radicals and a transparent polymer material that self-heals using Diels-Alder reaction. The anti-bending layer can be realized by an inkjet printing process, and then cured after printing, or it can be formed by a coating method such as Slit, which is not specifically limited here.

[0063] Please continue reading Figure 1 The screen body 10 further includes a bonding portion 9 arranged opposite to the display portion 2 , and the bending portion 1 connects the display portion 2 and the bonding portion 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 tape 93 and a padding block 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 tape 93 is disposed between the first protective layer 91 and the second protective layer 92, and the padding block 94 is disposed between the composite tape 93 and the first protective layer 91.

[0065] Among them, 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 microns, the thickness of the composite tape 93 is set to 90-130 microns, and the material of the composite tape 93 includes at least one of composite foam, silicone gel and copper foil, wherein the material of the composite tape 93 preferably includes silicone gel and copper foil; further, the thickness of the pad block 94 is set to 25-35 microns.

[0066] In one embodiment, in order to make the bending radius of the bending portion 1 reach 0.1 mm, the thickness of the first protective layer 91 and the second protective layer 92 can be set to 35 microns respectively, the thickness of the composite tape 93 is 100 microns, the material includes silicone gel and copper foil, and the thickness of the pad block 94 is set to 30 microns.

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

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

[0069] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: A screen body, comprising a display portion and a bending portion, wherein the bending portion is bent toward a side away from a light emitting surface of the display portion, wherein a thickness of the bending portion is less than a thickness of the display portion; The impact-resistant layer is arranged in the screen body and / or arranged outside the screen body. The material of the impact-resistant layer includes negative Poisson's ratio material and / or the impact-resistant layer is provided with a negative Poisson's ratio material molecular structure.

2. The display panel according to claim 1, characterized in that: The display panel further includes: The cover plate is arranged on the light emitting surface side of the screen body, and the impact-resistant layer is arranged in the cover plate.

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

4. The display panel according to claim 2, characterized in that: The material of the impact-resistant layer includes a negative Poisson's ratio material, and the cover plate includes a cover plate body and the impact-resistant layer arranged on a side of the cover plate body away from the screen body; Preferably, the cover plate body comprises a first sub-body, a glue layer and a second sub-body stacked in sequence, and the impact-resistant layer is arranged on a side of the first sub-body away from the second sub-body; Preferably, the material of at least one of the first sub-body and the second sub-body comprises a negative Poisson's ratio material; Preferably, the material of the first sub-body includes transparent polyimide, and the material of the second sub-body includes negative Poisson's ratio material; Preferably, the material of the first sub-body includes negative Poisson's ratio material, and the material of the second sub-body includes ultra-thin glass.

5. The display panel according to claim 1, characterized in that: The material of the impact-resistant layer includes a negative Poisson's ratio material, and the negative Poisson's ratio material includes at least one of a composite material, a porous material, and a structural material; Preferably, the composite material comprises at least one of a carbon fiber reinforced composite material and a glass sphere filled composite material; Preferably, the porous material comprises at least one of foamed metal and polyurethane foam; Preferably, the structural material includes at least one of a thin film structure and a crystalline substance composed of metal ions and organic ligands. Preferably, the impact-resistant layer is provided with a negative Poisson's ratio material molecular structure, and the negative Poisson's ratio material molecular structure includes at least one of a concave angle structure, a chiral structure, a rotational rigid body structure, a perforated structure, and a pleated structure.

6. The display panel according to claim 1, characterized in that: The screen body also includes: A substrate, wherein the thickness of the substrate located at the bending portion is smaller than the thickness of the substrate located at the display portion; An array layer, disposed on one side of the substrate and at least located on the display portion; A light-emitting layer, arranged on a side of the array layer away from the substrate and at least located on the display portion; Preferably, the substrate comprises a first sub-substrate, a buffer sub-layer and a second sub-substrate which are stacked in sequence, the array layer is arranged on a side of the second sub-substrate away from the first sub-substrate, wherein 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; Preferably, a surface of the first sub-substrate facing away from the second sub-substrate is provided with a groove located at the bending portion.

7. The display panel according to claim 6, characterized in that: The array layer comprises: An insulating layer, disposed on the display portion and the bending portion; A metal wiring layer is arranged on a side of the insulating layer away from the substrate and is located at the display portion and the bending portion; Wherein, the thickness of the insulating layer in the bending portion is smaller than the thickness of the insulating layer in the display portion; Preferably, the material of the insulating layer includes organic glue.

8. The display panel according to claim 1, characterized in that: The display panel further includes: An anti-bending layer, arranged on a side of the bending portion away from the display portion; Preferably, the material of the anti-bending layer includes at least one of ultraviolet curing glue, inkjet printing organic material and transparent polymer material.

9. The display panel according to claim 1, characterized in that: The screen body further includes a bonding portion, the bonding portion is arranged opposite to the display portion, and the bending portion connects the display portion and the bonding portion; Preferably, the display panel further comprises: A first protective layer is arranged on a 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 is located between the display portion and the first protective layer; A composite tape, disposed between the first protective layer and the second protective layer; A padding block is arranged between the composite tape and the first protective layer.

10. A display device, characterized in that: The invention comprises the display panel described in any one of claims 1 to 9.

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