Display panel and display device

Abstract

The present application discloses a display panel and a display device, wherein the display panel includes a substrate, a light-emitting unit layer, an encapsulation barrier layer, an encapsulation layer, a water vapor detection structure and a repair unit, wherein the light-emitting unit layer is arranged on the substrate and is located in the display area; the encapsulation barrier layer is arranged around the light-emitting unit layer and is located in the non-display area; the encapsulation layer covers the light-emitting unit layer and partially extends onto the encapsulation barrier layer; the water vapor detection structure is arranged in the encapsulation barrier layer, and the water vapor detection structure is used to detect whether there is water vapor in the encapsulation barrier layer; the repair unit is arranged close to the water vapor detection structure, and is used to repair cracks in the encapsulation layer after the water vapor detection structure determines that there is water vapor intrusion. The present application can judge the water vapor intrusion situation at different positions by adding a water vapor detection structure on the encapsulation barrier layer, and use the repair unit to repair cracks in the area where water vapor intrusion exists.

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 diodes (OLEDs) have the advantages of surface light source, cold light, energy saving, fast response, flexibility, ultra-thinness and low cost, and their mass production technology is becoming increasingly mature. Since OLEDs have poor stability and are extremely sensitive to water and oxygen, encapsulation technology is particularly critical. The purpose of encapsulation is mainly to prevent water vapor and oxygen from entering the OLED, and cracks are easily generated during the production process of the encapsulation layer. When cracks appear on the display screen or water vapor enters from the outside, the aging speed of the OLED organic light-emitting layer device will be accelerated. Therefore, strict encapsulation must be performed to extend the life and improve stability.

[0003] However, even after strict packaging, the above problems are still inevitable. Therefore, some specific detection methods are needed. The test results can be used to infer the degree of failure of the device caused by external influences, and then determine whether to repair it. Summary of the invention

[0004] The purpose of the present application is to provide a display panel and a display device. By adding a water vapor detection structure on the encapsulation barrier layer, the water vapor intrusion situation at different positions can be determined, and a repair unit can be used to repair cracks in areas where water vapor intrusion exists.

[0005] The present application discloses a display panel, which includes a display area and a non-display area. The display panel includes a substrate, a light-emitting unit layer, an encapsulation barrier layer, an encapsulation layer, a water vapor detection structure and a repair unit. The light-emitting unit layer is arranged on the substrate and is located in the display area; the encapsulation barrier layer is arranged around the light-emitting unit layer and is located in the non-display area; the encapsulation layer covers the light-emitting unit layer and partially extends onto the encapsulation barrier layer; the water vapor detection structure is arranged in the encapsulation barrier layer, and the water vapor detection structure is used to detect whether there is water vapor in the encapsulation barrier layer; the repair unit is arranged close to the water vapor detection structure, and is used to repair cracks in the encapsulation layer after the water vapor detection structure determines that there is water vapor intrusion.

[0006] Optionally, the water vapor detection structure is formed of a conductive hydrogel material, and the water vapor detection structure is used to determine whether water vapor has invaded the encapsulation barrier layer according to the change in resistance or capacitance after the water vapor detection structure absorbs water vapor; the repair unit is formed of a hydrogel material doped with a photothermal agent, and the temperature of the repair unit increases under infrared laser irradiation, and changes from a gel state to a molten state. After the infrared laser is removed, the temperature decreases, and the molten state recovers to a gel state.

[0007] Optionally, the encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer, the first inorganic encapsulation layer is arranged on the light-emitting unit layer, extends from the display area to the non-display area, and covers the encapsulation barrier layer; the organic encapsulation layer covers the light-emitting unit layer and is blocked by the encapsulation barrier layer; the second inorganic encapsulation layer is arranged on the organic encapsulation layer, extends from the display area to the non-display area, and covers the encapsulation barrier layer; the water vapor detection structure and the repair unit are respectively arranged between the first inorganic encapsulation layer and the organic encapsulation layer.

[0008] Optionally, the encapsulation barrier layer includes a first barrier dam and a second barrier dam, the organic encapsulation layer is arranged to cover the first barrier dam, and on the orthographic projection of the substrate, the organic encapsulation layer does not overlap or partially overlaps with the second barrier dam; the water vapor detection structure includes a first detection part, and the first detection part is arranged between the first barrier dam and the second barrier dam; the repair unit is arranged between the first barrier dam and the second barrier dam.

[0009] Optionally, the first barrier dam is arranged around the display area, and the second barrier dam is arranged around the first barrier dam; the water vapor detection structure also includes a second detection part, and the second detection part is arranged on the first barrier dam; the repair unit is arranged on the second barrier dam.

[0010] Optionally, the water vapor detection structure and the repair unit are arranged in the same layer, and on the orthographic projection of the substrate, the water vapor detection structure and the repair unit do not overlap.

[0011] Optionally, the repair unit is arranged to cover the first barrier dam, the second barrier dam, and the area between the first barrier dam and the second barrier dam; in the direction from the first barrier dam to the second barrier dam, the repair unit is provided with multiple repair parts, gaps are provided between adjacent repair parts, and the repair parts extend in a direction surrounding the first barrier dam.

[0012] Optionally, a partition portion is further provided between adjacent repair portions, and the partition portion is formed of an inorganic material or an organic material.

[0013] Optionally, a laser lamp bead is further provided on the side of the substrate facing away from the encapsulation barrier layer, and in the orthographic projection of the substrate, the projection of the laser lamp bead is within the projection range of the repair unit; the laser lamp bead is used to emit infrared laser toward the repair unit.

[0014] The present application also discloses a display device, comprising a driving circuit and the above-mentioned display panel, wherein the driving circuit is used to drive the display panel to display.

[0015] The present application uses a water vapor detection structure to detect whether there is water vapor intrusion in the area where the encapsulation barrier dam is located. In the case of water vapor intrusion, it can be determined that there is a problem of encapsulation layer rupture or poor sealing in the area where the current water vapor detection structure is located, and then the cracks in the encapsulation layer are filled by controlling the repair unit at the corresponding position. The present application uses the cooperation of the water vapor detection structure and the repair unit. In the case of cracks in the encapsulation layer, the location of the cracks may be determined by the detection of the water vapor detection structure, and the cracks are filled by the repair unit at the corresponding position, so that water vapor no longer enters the cracks, and the extension of the cracks is further prevented, thereby avoiding the display panel failure caused by the cracks, and to a certain extent, it can effectively extend the service life of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 is a schematic diagram of a display panel of the present application;

[0018] Figure 2 is a schematic diagram of the preparation of the hydrogel of the present application;

[0019] Figure 3 is a schematic diagram of the water vapor detection structure of the present application;

[0020] Figure 4 is a schematic diagram of the encapsulation barrier dam of the present application;

[0021] Figure 5 is a schematic top view of a display panel of the present application;

[0022] Figure 6 is a schematic diagram of another display panel of the present application;

[0023] Figure 7This is a schematic diagram of another display panel of the present application.

[0024] Figure 8 is a schematic diagram of a display device of the present application.

[0025] Among them, 100, display panel; 101, display area; 102, non-display area; 110, substrate; 120, light-emitting unit layer; 130, encapsulation barrier layer; 131, first barrier dam; 132, second barrier dam; 140, encapsulation layer; 141, first inorganic encapsulation layer; 142, organic encapsulation layer; 143, second inorganic encapsulation layer; 150, water vapor detection structure; 151, first detection unit; 152, second detection unit; 160, repair unit; 161, repair unit; 162, partition unit; 170, laser lamp beads; 200, display device; 210, drive circuit. DETAILED DESCRIPTION

[0026] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0027] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "multiple" means two or more. In addition, the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. indicating orientation or positional relationships are described based on the orientation or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing the simplified description of the present application, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0028] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0029] Figure 1 is a schematic diagram of the display panel of the present application, see Figure 1As shown, the present application discloses a display panel 100, which includes a display area 101 and a non-display area 102. The display panel 100 includes a substrate 110, a light-emitting unit layer 120, an encapsulation barrier layer 130, an encapsulation layer 140, a water vapor detection structure 150 and a repair unit 160. The light-emitting unit layer 120 is arranged on the substrate 110 and is located in the display area 101; the encapsulation barrier layer 130 is arranged around the light-emitting unit layer 120 and is located in the non-display area 102; the encapsulation layer 140 covers the light-emitting unit layer 120 and partially extends onto the encapsulation barrier layer 130; the water vapor detection structure 150 is arranged in the encapsulation barrier layer 130, and the water vapor detection structure 150 is used to detect whether there is water vapor in the encapsulation barrier layer 130; the repair unit 160 is arranged close to the water vapor detection structure 150, and is used to repair cracks in the encapsulation layer 140 after the water vapor detection structure 150 determines that there is water vapor intrusion.

[0030] The present application uses the water vapor detection structure 150 to detect whether there is water vapor intrusion in the area where the encapsulation barrier layer 130 is located. In the case of water vapor intrusion, it can be determined that there is a problem of cracking or poor sealing of the encapsulation layer 140 in the area where the current water vapor detection structure 150 is located, and then the cracks in the encapsulation layer 140 are filled by controlling the repair unit 160 at the corresponding position. The present application uses the cooperation between the water vapor detection structure 150 and the repair unit 160. In the case of cracks in the encapsulation layer 140, the position where the cracks may exist is determined by the detection of the water vapor detection structure 150, and the cracks are filled by the repair unit 160 at the corresponding position, so that water vapor no longer enters the cracks, and the extension of the cracks is further prevented, thereby avoiding the problem of display panel 100 failure caused by cracks, and to a certain extent, the service life of the display panel 100 can be effectively extended.

[0031] Specifically, the water vapor detection structure 150 is formed of a conductive hydrogel material, and the water vapor detection structure 150 is used to determine whether water vapor has invaded into the encapsulation barrier layer 130 according to changes in resistance or capacitance after the water vapor detection structure 150 absorbs water vapor.

[0032] Specifically, the conductive hydrogel material in the present application is generally prepared by doping a conductive additive in a hydrogel, so that the hydrogel has high conductivity. The hydrogel is synthesized from monomers or polymers by forming a water-permeable cross-linked network. Figure 2 is a schematic diagram of the hydrogel preparation of the present application, see Figure 2As shown, the monomers are polymerized to form polymers, and then an interpenetrating polymer network (IPN) is formed through the gelation process (cross-linking method). The hydrogel material can retain a large amount of water and maintain a three-dimensional network structure. The cross-linking of the condensed network can be divided into non-covalent bonds (i.e. physical cross-linking) or covalent bonds (i.e. chemical cross-linking). Hydrogels are usually jelly-like solids with elasticity.

[0033] The conductive hydrogel material in this application is a self-healing hydrogel based on sodium alginate. Self-healing refers to a material that can automatically repair and restore its original function after being damaged. Sodium alginate [C6H7O6Na]n is a byproduct of iodine and mannitol extracted from brown algae such as Sargassum or kelp. It is a linear natural polysaccharide polymer composed of β-1, 4-D-mannuronic acid (β-D-Mannuronic, M) units and α-1, 4-L-guluronic acid (α-L-guluronic, G) units, with a structure such as Figure 2 As shown. The difference in the specific gravity and position of the two uronic acids (i.e., M unit and G unit) in the molecule of sodium alginate will result in significant differences in the gelling power, viscosity, molecular selectivity and other characteristics of alginate. Since sodium alginate contains a large number of carboxyl groups, it can show polyanion phenomenon in aqueous solution and produce corresponding adhesive substances, making the aqueous solution of sodium alginate very viscous. What is important is that the Na+ in the G unit of sodium alginate can exchange ions with multivalent metal cations (Zn2+, Fe3+, Ba2+, Cr3+, Ca2+, etc.) in aqueous solution, so that multiple G units and multivalent metal cations are cross-linked to form an "egg box" model, as shown in Figure 2 As shown, a sodium alginate-based hydrogel containing metal ions is formed. Sodium alginate can quickly produce gel materials under very warm climate conditions and is widely used due to its good film-forming properties and high gel material strength.

[0034] The self-healing hydrogel of this embodiment can be a sodium alginate-chitosan quaternary ammonium salt water gel material. The self-healing mechanism of the sodium alginate-chitosan quaternary ammonium salt water gel is mainly based on ion exchange and polymerization. Ion exchange: When the gel breaks, the sodium alginate and chitosan quaternary ammonium salt will flow to each other and recombine to form a new ion cross-linked network. Here, the ion exchange can promote the reassembly of ions at the break in the gel to achieve self-healing of the material. Polymerization: The water molecules in the gel will reconnect at the broken gap to form a chain structure of water. When the water molecules in the damaged part of the gel gradually evaporate or are excluded, the chain structure will gradually form a solid bridge at the break, so that the material can be reconnected. This self-healing ability of polymerization can be achieved by controlling the concentration and molecular structure of the polymerizer in the gel. At the same time, temperature can also accelerate the healing process, which is not required in this proposal.

[0035] Adding conductive additives such as metals (nano-Ag, Cu, etc.) or non-metals (C nanotubes, graphene, electroactive aniline tetramer (AT)) to the above-mentioned sodium alginate-chitosan quaternary ammonium salt water gel can make the self-healing gel have high conductivity. By improving the composition of the polymer gel, a gel with a conductivity of 374S cm-1 and an elongation of 250% can be made.

[0036] Figure 3 is a schematic diagram of the water vapor detection structure of the present application, see Figure 3 According to the resistance test model in the paper, conductive hydrogel is essentially a resistive conductor. After absorbing water, its internal structure will change to a certain extent, resulting in a corresponding change in its conductivity. By using the resistance-related test, the relationship between water vapor of different concentrations and resistance changes can be obtained. Figure 3 In the capacitance test model, conductive hydrogel is essentially a resistive conductor. An insulating hydrogel with a certain swelling coefficient can be set between two layers of conductive hydrogel. When the insulating hydrogel between the conductive hydrogels absorbs water, the internal structure changes, resulting in changes in the capacitance on both sides. At the same time, the conductivity of the conductive hydrogel will also change after absorbing water. Combining the two to test the capacitance characteristics can more accurately detect water vapor conditions.

[0037] The present application forms a water vapor detection structure 150 by using a conductive hydrogel material. After absorbing water vapor, the conductive hydrogel material will swell in volume, so that its conductivity will change accordingly, for example, the resistance or capacitance will change, and after absorbing water vapor of different concentrations, the change in conductivity is different, and it has a high sensitivity. Relatively speaking, the use of conductive hydrogel materials to detect the degree of water vapor intrusion into the encapsulation layer 140 has high detection accuracy and can determine the water vapor intrusion situation at different locations. At the same time, the conductive hydrogel material has a certain ability to absorb water vapor. In the case of water vapor intrusion, it can adsorb water vapor to a certain extent to prevent the water vapor from further entering the encapsulation layer 140. Moreover, since cracks or pinholes are prone to appear in the encapsulation layer 140 at the position of the encapsulation barrier layer 130, water vapor intrusion is prone to occur at this position. Therefore, this embodiment sets the water vapor detection structure 150 in this area, which can quickly detect whether there is water vapor intrusion at this position, and even calculate the degree of water vapor intrusion according to the change in conductivity. Through subsequent process improvements or display compensation, the encapsulation effect of the display panel 100 is improved, thereby effectively improving the quality of the display panel 100.

[0038] Specifically, the repair unit 160 is formed of a hydrogel material doped with a photothermal agent. The temperature of the repair unit 160 increases under infrared laser irradiation, and changes from a gel state to a molten state. After the infrared laser is removed, the temperature decreases, and the molten state recovers to a gel state.

[0039] In this embodiment, a photothermal agent is added to a common hydrogel with a low swelling coefficient to obtain a hybrid gel with good mechanical properties, and the composite gel can exhibit good photothermal properties. Therefore, the temperature of the hydrogel material doped with the photothermal agent rises rapidly to the gel-sol transition temperature under near-infrared laser irradiation, and the gel heals rapidly at room temperature. Therefore, the repair unit 160 in this embodiment exhibits unique and effective "weldability". Good thermal and photothermal recovery / repair capabilities can greatly expand the usability of gel materials, not only increasing the durability of the materials, but also reducing the waste of polymer materials, thereby achieving the purpose of environmental protection and sustainable development.

[0040] It is understandable that the water vapor detection structure 150 of the present application can not only be formed by the above-mentioned conductive hydrogel material, but also can adopt conventional capacitive detection lines to detect cracks and the like. The hydrogel material doped with a photothermal agent used in the repair unit 160 is used to repair the cracks. Of course, the repair unit 160 can not only use hydrogel materials doped with photothermal agents, such as hot melt adhesive materials, but can also complete the repair of cracks by heating. Relatively speaking, since the repair unit 160 is formed by a hydrogel material, the hydrogel material also has an absorption effect on water vapor, and can absorb a certain amount of water vapor, reducing the water vapor invading the display area 101.

[0041] Figure 4 is a schematic diagram of the encapsulation barrier layer of the present application, see Figure 1 and Figure 4 As shown, the encapsulation layer 140 in this embodiment adopts thin film encapsulation technology, that is, the encapsulation layer 140 adopts a laminated design of multiple organic material layers and inorganic material layers, and achieves the encapsulation effect by stacking several layers.

[0042] The encapsulation layer 140 includes a first inorganic encapsulation layer 141, an organic encapsulation layer 142 and a second inorganic encapsulation layer 143. The first inorganic encapsulation layer 141 is arranged on the light-emitting unit layer 120, extends from the display area 101 to the non-display area 102, and covers the encapsulation barrier layer 130; the organic encapsulation layer 142 is arranged to cover the light-emitting unit layer 120 and is blocked by the encapsulation barrier layer 130; the second inorganic encapsulation layer 143 is arranged on the organic encapsulation layer 142, extends from the display area 101 to the non-display area 102, and covers the encapsulation barrier layer 130; the water vapor detection structure 150 and the repair unit 160 are respectively arranged between the first inorganic encapsulation layer 141 and the organic encapsulation layer 142.

[0043] Among them, the first inorganic encapsulation layer 141 can be formed of silicon oxynitride material, and the thickness can be between 1um and 2um. The organic encapsulation layer 142 can be formed of acrylic or resin organic material, and the thickness can be between 10um and 30um. The second inorganic encapsulation layer 143 can be formed of silicon nitride material, and the thickness can be about 2um. The inorganic material layer is generally prepared by vacuum deposition, and the organic material layer is generally formed by inkjet printing. The organic material after inkjet printing is statically leveled so that the organic encapsulation layer 142 is flattened to the top of the light-emitting unit layer 120. The main function of the encapsulation barrier layer 130 is to prevent the organic material from overflowing during the static leveling process of the organic material.

[0044] However, generally speaking, in the process of preparing the light-emitting unit, some unavoidable protruding small particles (Particles) have appeared on the surface of the film layer before the cathode is plated, and because the cathode layer is very thin, these protruding small particles are sufficient to pierce the cathode, causing pinholes or protrusions in the metal layer of the cathode. As a result, in the subsequent vacuum deposition of the first inorganic encapsulation layer 141, because the inorganic film layer in the first encapsulation layer 140 cannot be made thick, and the size of these particles is uneven, some particles may not be completely covered after being encapsulated by the first encapsulation layer 140 and are partially exposed, and some small particles will form pinholes after being covered. There will be pinholes and exposed particles on the surface of the first encapsulation layer 140, and there will be fine cracks in the film layer around these particles. The presence of these pinholes and cracks will also reduce the strength and sealing of the film layer. When the acrylic organic encapsulation layer 142 is cured on top of these film layers, the acrylic will fill the pinholes and cracks, and the water vapor path will directly invade along these interfaces, causing direct failure of the device. Generally, the failure of the encapsulation layer 140 changes and deepens in real time and has regional characteristics. When the encapsulation fails, the damage caused to the device is different, and the degree of influence on the corresponding display is also different.

[0045] In this embodiment, by setting the water vapor detection structure 150 between the first inorganic encapsulation layer 141 and the organic encapsulation layer 142, when cracks appear in the first inorganic encapsulation layer 141, detection is performed through the water vapor detection structure 150 set between the first inorganic encapsulation layer 141 and the organic encapsulation layer 142. Normally, when cracks appear in the first inorganic encapsulation layer 141, in a humid environment test or actual use, water vapor will gradually extend along the position of the crack toward the display area 101, causing the light-emitting units of the display area 101 to have different degrees of failure. In this embodiment, water vapor intrusion is detected by setting a water vapor detection structure 150 at the position where cracks are most likely to occur. When water vapor intrusion exists, the repair unit 160 is used to repair cracks that may exist in the area.

[0046] Specifically, the encapsulation barrier layer 130 includes a first blocking dam 131 and a second blocking dam 132, the organic encapsulation layer 142 is arranged to cover the first blocking dam 131, and on the orthographic projection of the substrate 110, the first blocking dam 131 is arranged around the display area 101, and the second blocking dam 132 is arranged around the first blocking dam 131; the organic encapsulation layer 142 does not overlap or partially overlaps with the second blocking dam 132.

[0047] The water vapor detection structure 150 includes a first detection portion 151 and a second detection portion 152 . The first detection portion 151 is disposed between the first barrier dam 131 and the second barrier dam 132 ; and the second detection portion 152 is disposed on the first barrier dam 131 .

[0048] Among them, the first detection part 151 and the second detection part 152 can be used separately or in combination. A plurality of first detection parts 151 or second detection parts 152 are arranged in the area where the encapsulation barrier layer 130 is located to detect cracks in the encapsulation layer 140 at the position of the encapsulation barrier layer 130. It can be understood that, in this embodiment, taking the second barrier dam 132 as a barrier dam closer to the edge of the display panel 100 and the first barrier dam 131 as a barrier dam closer to the display area 101 as an example, the first detection part 151 and the second detection part 152 are respectively arranged in the area of ​​the encapsulation barrier layer 130 and can be distributed at various positions. For example, the first detection part 151 or the second detection part 152 is respectively arranged at the film layer climbing position, the film layer gradually increasing or decreasing position, the film layer corner position, etc., to detect the position where the film layer is prone to breakage, so as to improve the detection coverage.

[0049] Specifically, the water vapor detection structure 150 and the repair unit 160 are arranged on the same layer, and the water vapor detection structure 150 and the repair unit 160 do not overlap on the orthographic projection of the substrate 110. The repair unit 160 covers the first barrier dam 131, the second barrier dam 132, and the area between the first barrier dam 131 and the second barrier dam 132.

[0050] In this embodiment, the repair unit 160 covers the encapsulation barrier layer 130 area as completely as possible, so that most of the cracks in the area can be absorbed by the repair unit 160. When the water vapor detection structure 150 and the repair unit 160 respectively use hydrogel materials with different doping, on the one hand, in order to maintain the accuracy of the water vapor detection structure 150 to detect water vapor and avoid interference from the repair unit 160, on the other hand, to avoid the repair unit 160 absorbing water vapor and transferring it to the water vapor detection structure 150, and when the repair unit 160 and the water vapor detection structure 150 are stacked, the cracks generated in the first inorganic encapsulation layer 141 cannot be repaired. Therefore, the water vapor detection structure 150 and the repair unit 160 are arranged in the same layer, and the two are not overlapped.

[0051] Among them, a hydrogel material doped with a photothermal agent is also provided between the first inorganic encapsulation layer 141 and the organic encapsulation layer 142, which can effectively fill the gaps or micropores between the film interfaces when the two layers are formed. When the display panel 100 is deformed, the stress between the encapsulation layers 140 can be dispersed to prevent cracks and other phenomena from occurring between the protective film layers. In addition, since the hydrogel material also has good water absorption, when water vapor invades along the film interface or cracks between the encapsulation layers 140, it is absorbed by the water vapor absorption structure, and due to the extremely small swelling property, the appearance of the water vapor structure will not change significantly. At the same time, with one more film layer, when water vapor enters, its path will branch, that is, after the water vapor entering through the periphery encounters the water vapor absorption structure, part of it will be absorbed, and part of it will branch along the up and down directions of the interface between the organic encapsulation layer 142 and the water vapor absorption structure, which can effectively increase the water vapor path.

[0052] Figure 5 is a top view schematic diagram of the display panel of the present application, see Figure 5 As shown, the first barrier dam 131 and the second barrier dam 132 are respectively arranged around the display area 101, and the first barrier dam 131 and the second barrier dam 132 are generally in the shape of a racetrack. Taking the first barrier dam 131 as an example, the extension direction of the first barrier dam 131 is the surrounding direction, and the width of the first barrier dam 131 is the length perpendicular to the extension direction. Generally speaking, on the adjacent two sides of the display panel 100, the width directions of the first barrier dam 131 at different positions are perpendicular.

[0053] In the circumferential direction, a plurality of first detection parts 151 may be arranged at intervals, and a plurality of second detection parts 152 may be arranged at intervals. By arranging them at intervals, the space occupied by the first detection parts 151 and the second detection parts 152 can be reduced. Moreover, since water vapor intrusion is uncertain and can be detected within a certain range, it is not necessary to arrange a continuous circle of first detection parts 151. By arranging one first detection part 151 within a certain area, it is possible to detect whether there is water vapor intrusion in the area.

[0054] In a specific embodiment, the number of the first detection parts 151 and the second detection parts 152 arranged around the display panel 100 gradually decreases in the direction gradually approaching the display area 101 along the edge of the non-display area 102. For example, the outermost circle of second detection parts 152 is closest to the outside and has the greatest possibility of water vapor intrusion. Therefore, the more the number of second detection parts 152 is arranged, the smaller the interval between adjacent second detection parts 152. For example, the innermost circle of second detection parts 152 has a lower possibility of water vapor intrusion. Therefore, the number of second detection parts 152 that can be arranged is smaller, and the interval between adjacent second detection parts 152 is larger. Of course, the arrangement rule of the first detection parts 151 can be based on the design of the second detection parts 152.

[0055] Figure 6 is a schematic diagram of another display panel of the present application, see Figure 6 As shown, different from the above-mentioned embodiment, the repair unit 160 in this embodiment is also segmented. In the direction from the first blocking dam 131 to the second blocking dam 132, the repair unit 160 is provided with a plurality of repair parts 161, gaps are provided between adjacent repair parts 161, and the repair parts 161 extend in the direction surrounding the first blocking dam 131.

[0056] The repairing portion 161 may be consistent with the projection shape of the first barrier dam 131, that is, a racetrack shape. The racetrack shape generally refers to a long rectangular shape, with two ends of which are connected to two semicircles respectively.

[0057] In this embodiment, the repair unit 160 is segmented in the direction from the first blocking dam 131 to the second blocking dam 132 to prevent the outer repair unit 160 from absorbing water vapor and extending along the repair unit 160 to the repair unit 160 where the first blocking dam 131 is located. By providing a multi-circle surrounding repair portion 161, the possibility of water vapor extending along the repair unit 160 to the display area 101 is reduced, thereby preventing water vapor from entering the display area 101.

[0058] Specifically, a partition 162 is provided between adjacent repairing parts 161, and the partition 162 is formed of inorganic material or organic material. Among them, the inorganic material further prevents water vapor from overflowing from the repairing part 161 to the adjacent repairing part 161. Specifically, to ensure water vapor isolation between adjacent repairing parts 161, a certain distance needs to be disconnected, and an inorganic material layer can be mixed in this distance. Due to the good film quality and water isolation of the inorganic material (relative to the organic encapsulation layer 142), water vapor will be forced to transfer in a ring along the contact surface between the repairing part 161 and the partition 162 to avoid its linear invasion. At the same time, due to the soft appearance of the repairing part 161, the partition 162 with a certain rigidity sandwiched between the two layers will make the overall film layer structure more stable.

[0059] Furthermore, the width of each repair portion 161 may be between 100 angstroms and 300 angstroms. Taking the first barrier dam 131 as the barrier dam closest to the display area 101, the repair unit 160 should not be provided on the side of the first barrier dam 131 close to the display area 101 to prevent the hydrogel in the repair unit 160 from directly releasing water vapor into the display area 101 when it ruptures, thereby causing direct failure of the device.

[0060] Figure 7 is a schematic diagram of another display panel of the present application, see Figure 7 As shown, a laser lamp bead 170 is also provided on the side of the substrate 110 facing away from the encapsulation barrier layer 130 . On the orthographic projection of the substrate 110 , the projection of the laser lamp bead 170 is within the projection range of the repair unit 160 . The laser lamp bead 170 is used to emit infrared laser toward the repair unit 160 .

[0061] In this embodiment, the laser lamp bead 170 can be set on the module structure, such as on the outer frame, to perform laser irradiation on the repair unit 160. In this embodiment, by setting the degree of automation, water vapor detection is performed according to the set first detection unit 151 and / or the second detection unit 152, and extraction and comparison are performed according to the real-time resistance or capacitance detection situation, so as to judge the water vapor absorption situation, and then reversely infer the current water vapor entry degree, and at the same time, according to the detection situation at different positions, the path where water vapor already exists is determined, and the laser lamp bead 170 on the corresponding path is adjusted, and the repair unit 160 is used for repair. After the repair is completed, it is judged whether the repair is successful or effective based on the continuous changes of the water vapor detection structure at the current position. Of course, the laser lamp bead 170 may not be set on the display panel 100, and an external infrared laser may be provided for repair through the repair process, but automatic repair cannot be achieved in the finished product stage.

[0062] Figure 8 is a schematic diagram of the display device of the present application, see Figure 8As shown, the present application further discloses a display device, which includes a driving circuit and the display panel 100 in any one of the above embodiments, wherein the driving circuit is used to drive the display panel 100 to display.

[0063] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0064] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A display panel, comprising a display area and a non-display area, characterized in that: The display panel comprises: substrate; A light-emitting unit layer, disposed on the substrate and located in the display area; An encapsulation barrier layer is disposed around the light-emitting unit layer and is located in the non-display area; An encapsulation layer, covering the light-emitting unit layer and partially extending onto the encapsulation barrier layer; a water vapor detection structure, disposed in the encapsulation barrier layer, the water vapor detection structure being used to detect whether there is water vapor in the encapsulation barrier layer; and A repair unit, disposed close to the water vapor detection structure, for converting into molten adhesive to repair cracks in the packaging layer after the water vapor detection structure determines that water vapor exists; The encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, wherein the first inorganic encapsulation layer is disposed on the light-emitting unit layer, extends from the display area to the non-display area, and covers the encapsulation barrier layer; the organic encapsulation layer covers the light-emitting unit layer and is blocked by the encapsulation barrier layer; the second inorganic encapsulation layer is disposed on the organic encapsulation layer, extends from the display area to the non-display area, and covers the encapsulation barrier layer; The water vapor detection structure and the repair unit are respectively arranged between the first inorganic encapsulation layer and the organic encapsulation layer; The encapsulation barrier layer includes a first barrier dam and a second barrier dam, the organic encapsulation layer is arranged to cover the first barrier dam, and on the orthographic projection of the substrate, the organic encapsulation layer does not overlap or partially overlaps with the second barrier dam; the water vapor detection structure includes a first detection part, and the first detection part is arranged between the first barrier dam and the second barrier dam; the repair unit is arranged between the first barrier dam and the second barrier dam; The first barrier dam is arranged around the display area, and the second barrier dam is arranged around the first barrier dam; the water vapor detection structure further includes a second detection part, and the second detection part is arranged on the first barrier dam; the repair unit is arranged on the second barrier dam The water vapor detection structure is formed of a conductive hydrogel material, and the water vapor detection structure is used to determine whether water vapor has invaded the packaging barrier layer according to the change in resistance or capacitance after the water vapor detection structure absorbs water vapor; the repair unit is formed of a hydrogel material doped with a photothermal agent, and the temperature of the repair unit increases under infrared laser irradiation, and changes from a gel state to a molten state. After the infrared laser is removed, the temperature decreases, and the molten state recovers to a gel state.

2. The display panel according to claim 1, characterized in that: The water vapor detection structure and the repair unit are arranged on the same layer, and on the orthographic projection of the substrate, the water vapor detection structure and the repair unit do not overlap.

3. The display panel according to claim 2, characterized in that: The repair unit covers the first barrier dam, the second barrier dam, and the area between the first barrier dam and the second barrier dam; In the direction from the first barrier dam to the second barrier dam, the repair unit is provided with a plurality of repair parts, gaps are provided between adjacent repair parts, and the repair parts extend in a direction surrounding the first barrier dam.

4. The display panel according to claim 3, characterized in that: A partition portion is also arranged between adjacent repair portions, and the partition portion is formed of inorganic material or organic material.

5. The display panel according to claim 1, characterized in that: A laser lamp bead is also arranged on the side of the substrate facing away from the encapsulation barrier layer. On the orthographic projection of the substrate, the projection of the laser lamp bead is within the projection range of the repair unit; the laser lamp bead is used to emit infrared laser toward the repair unit.

6. A display device, characterized in that: It comprises a driving circuit and the display panel according to any one of claims 1 to 5, wherein the driving circuit is used to drive the display panel to display.

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