Display panel and display device

Abstract

The invention discloses a display panel and a display device.The display panel comprises a substrate, a pixel definition layer, a plurality of light-emitting units and a packaging layer, and the packaging layer is arranged on the light-emitting units and used for packaging the light-emitting units; wherein the packaging layer comprises a first organic packaging layer and a second organic packaging layer, the first organic packaging layer is arranged below the second organic packaging layer, and the first organic packaging layer is made of an organic packaging material at least comprising a first solid content and a second solid content; a wrinkle structure is formed on one side, close to the second organic packaging layer, of the first organic packaging layer, and the wrinkle structure is used for preventing ink for forming the second organic packaging layer from overflowing in the ink-jet printing process of the second organic packaging layer; according to the display panel, a flow blocking effect is formed on the leveling of the second organic packaging layer by using the fold structure, so that the area of the non-display area is reduced, and the structural design of the display panel is optimized.

Description

Technical Field

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

[0002] OLED (Organic Light-Emitting Diode) devices are gradually replacing LCD panels due to their advantages such as self-illumination, low power consumption, and the absence of a liquid crystal flow layer, especially in computer monitors and televisions, where more and more LCD panels are being replaced by OLEDs. Because OLEDs have poor stability and are extremely sensitive to water and oxygen, encapsulation technology is particularly crucial. The purpose of encapsulation is primarily to prevent moisture and oxygen from entering the OLED. However, cracks can easily form during the encapsulation layer manufacturing process. If cracks appear in the display screen or external moisture enters, it will accelerate the aging of the OLED's organic light-emitting layer. Therefore, rigorous encapsulation is essential to extend its lifespan and improve its stability.

[0003] Thin-film encapsulation technology is typically used to encapsulate components such as light-emitting units in display panels. However, during inkjet printing, the organic encapsulation layer in this technology can overflow, requiring additional encapsulation barriers, which leads to space occupation and an increase in the area of ​​the non-display area. Summary of the Invention

[0004] The purpose of this application is to provide a display panel and display device in which a pleated structure is formed on the side of the first organic encapsulation layer near the second organic encapsulation layer. The pleated structure is used to block the flow leveling of the second organic encapsulation layer, thereby reducing the area of ​​the non-display area and optimizing the structural design of the display panel.

[0005] This application discloses a display panel, which includes a substrate, a pixel definition layer, a plurality of light-emitting units, and an encapsulation layer. The pixel definition layer is disposed on the substrate and has a plurality of opening regions. The plurality of light-emitting units are respectively disposed within the plurality of opening regions. The encapsulation layer is disposed on the plurality of light-emitting units and is used to encapsulate the light-emitting units. The encapsulation layer includes a first organic encapsulation layer and a second organic encapsulation layer. The first organic encapsulation layer is disposed below the second organic encapsulation layer. The first organic encapsulation layer is formed using an organic encapsulation material that includes at least a first solid inclusion and a second solid inclusion. A wrinkled structure is formed on the side of the first organic encapsulation layer close to the second organic encapsulation layer. The wrinkled structure is used to block ink overflow for forming the second organic encapsulation layer during the inkjet printing process of the second organic encapsulation layer.

[0006] Optionally, the first solid inclusion is disposed in the upper layer within the first organic encapsulation layer, and the second solid inclusion is disposed in the lower layer within the first organic encapsulation layer; the curing shrinkage rate of the first solid inclusion is less than that of the second solid inclusion; the first solid inclusion is used to form wrinkles with the second solid inclusion to form the wrinkled structure after shrinkage occurs during the curing stage of the protective layer.

[0007] Optionally, the first solid content is an epoxy resin material or a methacrylic resin material, and the second solid content is an epoxy resin material or a methacrylic resin material; wherein the thickness of the first organic encapsulation layer is less than the thickness of the second organic encapsulation layer.

[0008] Optionally, the encapsulation layer further includes a first inorganic encapsulation layer and a second inorganic encapsulation layer. The first inorganic encapsulation layer is disposed on the light-emitting unit, the first organic encapsulation layer is disposed on the first inorganic encapsulation layer, and the second inorganic encapsulation layer is disposed on the second organic encapsulation layer. The display panel further includes an encapsulation barrier dam, which surrounds the first organic encapsulation layer and the second organic encapsulation layer to prevent ink overflow during inkjet printing of the first organic encapsulation layer and the second organic encapsulation layer. In the region extending from the encapsulation barrier dam to the edge of the display panel, the first inorganic encapsulation layer directly contacts the second inorganic encapsulation layer. The surface of the encapsulation barrier dam on the side away from the substrate is lower than the surface of the second organic encapsulation layer on the side away from the substrate.

[0009] Optionally, the display panel further includes a color filter layer and a protective layer; the color filter layer is disposed on the encapsulation layer, and the protective layer is disposed on the color filter layer; wherein, a microstructure is disposed on the side of the protective layer away from the substrate, the microstructure being used to cause diffuse reflection of ambient light incident on the display panel; the display panel includes a display area and a non-display area, the non-display area being disposed around the display area, and the microstructure being disposed at least covering the display area.

[0010] Optionally, the protective layer comprises an organic material; the organic material comprises at least a first solid component and a second solid component; the first solid component is disposed on the upper layer of the protective layer, and the second solid component is disposed on the lower layer of the protective layer; the curing shrinkage rate of the first solid component is less than the curing shrinkage rate of the second solid component; the first solid component is used to form wrinkles with the second solid component to form the microstructure after shrinkage occurs during the curing stage of the protective layer.

[0011] Optionally, the curing shrinkage rate of the first solid component is at least 3% less than the curing shrinkage rate of the second solid component; the first solid component is an epoxy resin material or a methacrylic resin material, and the second solid component is an epoxy resin material or a methacrylic resin material.

[0012] Optionally, the protective layer is disposed on the light-emitting surface of the display panel and located on the outermost side of the display panel; wherein the microstructure includes multiple folded protrusions, the width of the folded protrusions being 3 micrometers to 10 micrometers, and the thickness of the folded protrusions being 1 micrometer to 5 micrometers.

[0013] Optionally, the refractive index of the first organic encapsulation layer is higher than that of the second organic encapsulation layer.

[0014] This application also discloses a display device, including a driving circuit and the aforementioned display panel, wherein the driving circuit is used to drive the display panel to display.

[0015] This application employs a dual-layer structure with a first organic encapsulation layer and a second organic encapsulation layer. The first organic encapsulation layer, located at the bottom, is formed using an organic encapsulation material containing two solid inclusions. A wrinkled structure is then formed on the side of the first organic encapsulation layer closest to the second organic encapsulation layer. This wrinkled structure acts as a flow barrier for the leveling of the second organic encapsulation layer, preventing it from overflowing towards the edges of the display panel during inkjet printing, especially during leveling. Furthermore, when the first organic encapsulation layer is inkjet printed, the wrinkled structure simultaneously forms a self-blocking overflow effect, preventing excessive outflow of the first organic encapsulation layer. During the inkjet printing process of the second organic encapsulation layer, the wrinkled structure acts like multiple dams, blocking the outflow of the second organic encapsulation layer. This improves the film performance of the organic encapsulation layer and reduces the area requiring the obstruction structure, thereby reducing the area of ​​the non-display area, optimizing the structural design of the display panel, and enhancing its quality. Attached Figure Description

[0016] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings: Figure 1 This is a schematic diagram of a first type of display panel according to the first embodiment of this application; Figure 2This is a schematic diagram of a second type of display panel according to the first embodiment of this application; Figure 3 This is a schematic diagram of the folded structure of this application; Figure 4 This is a schematic diagram of a first type of display panel according to a second embodiment of this application; Figure 5 This is a schematic diagram of a second type of display panel according to a second embodiment of this application; Figure 6 This is a schematic diagram of the display device of this application.

[0017] Among them, 100 is a display panel; 110 is a substrate; 111 is a pixel definition layer; 112 is an opening area; 113 is a light-emitting unit; 120 is an encapsulation layer; 121 is a first inorganic encapsulation layer; 122 is an organic encapsulation layer; 1221 is a first organic encapsulation layer; 1222 is a second organic encapsulation layer; 1223 is a corrugated structure; 123 is a second inorganic encapsulation layer; 124 is an encapsulation barrier dam; 130 is a protective layer; 131 is a microstructure; 132 is a corrugated protrusion; 133 is a ceramic particle; 140 is a color filter layer; 141 is a color filter part; 142 is a light-shielding layer; 200 is a display device; and 210 is a driving circuit. Detailed Implementation

[0018] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature specified as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. Furthermore, terms such as "upper," "lower," "left," "right," "vertical," and "horizontal," indicating orientation or positional relationships, are based on the orientation or relative positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description of this application, not indicating that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0021] Figure 1This is a schematic diagram of a first type of display panel according to the first embodiment of this application. Figure 2 This is a schematic diagram of the second type of display panel according to the first embodiment of this application. Figure 1 The structure of the encapsulation layer 120 of the display area is shown. Figure 2 The structure of the encapsulation layer 120 for the display area and the non-display area is shown. See [link / reference] Figures 1 to 2 As shown, this application discloses a display panel 100, which includes a substrate 110, a pixel definition layer 111, a plurality of light-emitting units 113, and an encapsulation layer 120. The pixel definition layer 111 is disposed on the substrate 110 and has a plurality of opening regions 112. The plurality of light-emitting units 113 are respectively disposed within the plurality of opening regions 112. The encapsulation layer 120 is disposed on the plurality of light-emitting units 113 for encapsulating the light-emitting units 113. The encapsulation layer 120 includes a first organic encapsulation layer 1... 221 and a second organic encapsulation layer 1222, wherein the first organic encapsulation layer 1221 is disposed below the second organic encapsulation layer 1222, the first organic encapsulation layer 1221 is formed of an organic encapsulation material comprising at least a first solid inclusion and a second solid inclusion, and a pleated structure 1223 is formed on the side of the first organic encapsulation layer 1221 near the second organic encapsulation layer 1222, the pleated structure 1223 being used to block ink overflow for forming the second organic encapsulation layer 1222 during the inkjet printing process of the second organic encapsulation layer 1222.

[0022] This application provides a double-layer structure for the organic encapsulation layer 122, which has a first organic encapsulation layer 1221 and a second organic encapsulation layer 1222. The first organic encapsulation layer 1221, located in the lower layer, is formed using an organic encapsulation material containing two solid inclusions. A pleated structure 1223 is formed on the side of the first organic encapsulation layer 1221 near the second organic encapsulation layer 1222. This pleated structure 1223 acts as a flow barrier for the leveling of the second organic encapsulation layer 1222, preventing the second organic encapsulation layer 1222 from overflowing to the edge of the display panel 100 during the inkjet printing process, especially during the leveling process. Furthermore, when the first organic encapsulation layer 1221 is printed using an inkjet printing process, the wrinkled structure 1223 forms simultaneously with a self-blocking overflow effect, preventing excessive outflow of the first organic encapsulation layer 1221. Secondly, during the inkjet printing process of the second organic encapsulation layer 1222, the wrinkled structure 1223 acts like multiple dams, blocking the outflow of the second organic encapsulation layer 1222, thereby improving the film performance of the organic encapsulation layer 122. Moreover, it reduces the area where the blocking structure to block the overflow of the organic encapsulation layer 1222 is set, thereby reducing the area of ​​the non-display area, optimizing the structural design of the display panel 100, and improving the quality of the display panel 100.

[0023] Specifically, the encapsulation layer 120 of this application mainly adopts thin film encapsulation (TFE) technology, which achieves high water and oxygen barrier properties by stacking multiple inorganic and organic encapsulation films. Its core design lies in the alternating stacking of inorganic barrier layers and organic buffer layers. On the one hand, the high water and oxygen barrier properties of the inorganic encapsulation layer 120 are utilized; on the other hand, the organic encapsulation layer 122 can fill pinholes, cracks, and other defects in the inorganic encapsulation layer 120, disperse film stress, and prevent the inorganic encapsulation layer 120 from cracking. This application uses a three-layer encapsulation layer 120 as an example for explanation, but it is not limited to the encapsulation layer 120 having only a three-layer structure.

[0024] The encapsulation layer 120 further includes a first inorganic encapsulation layer 121 and a second inorganic encapsulation layer 123. The first inorganic encapsulation layer 121 is disposed on the light-emitting unit 113, the first organic encapsulation layer 1221 is disposed on the first inorganic encapsulation layer 121, and the second inorganic encapsulation layer 123 is disposed on the second organic encapsulation layer 1222. In this embodiment, two organic encapsulation layers 122 are disposed between the two inorganic encapsulation layers 120, thereby forming a structural design in which two organic encapsulation layers 122 are sandwiched between the two inorganic encapsulation layers 120. This utilizes the first organic encapsulation layer 1221 to improve the leveling and overflow phenomenon of the second organic encapsulation layer 1222.

[0025] It is understood that the organic encapsulation layer 122 in this embodiment is manufactured using an inkjet printing process. Organic encapsulation ink is deposited onto the substrate in droplet form using a high-precision printhead, and then cured to form a uniform organic encapsulation layer 122. Before curing, a leveling process is generally required to spread the organic encapsulation ink into a smooth and uniform film. The wrinkled structure 1223 provided in this embodiment primarily serves to prevent the organic encapsulation ink from overflowing into the effective display area.

[0026] Specifically, the first solid inclusion is disposed in the upper layer within the first organic encapsulation layer 1221, and the second solid inclusion is disposed in the lower layer within the first organic encapsulation layer 1221. The curing shrinkage rate of the first solid inclusion is less than that of the second solid inclusion; the first solid inclusion is used to form wrinkles with the second solid inclusion to form the wrinkled structure 1223 after shrinkage occurs during the curing stage of the protective layer 130.

[0027] In this embodiment, the main advantage lies in the difference in shrinkage rates between the first and second solid inclusions. Specifically, the shrinkage rate of the first solid inclusion in the upper layer is less than that of the second solid inclusion in the lower layer. During the curing process of the first organic encapsulation layer 1221, due to the difference in shrinkage rates between the first and second solid inclusions, the upper component undergoes buckling deformation under the tensile or compressive stress of the lower component, thereby forming a wrinkled morphology, i.e., a wrinkled structure 1223. This wrinkled structure 1223 is a micron-scale structure, which has a good anti-overflow effect on the organic encapsulation ink.

[0028] Figure 3 This is a schematic diagram of the folded structure of this application, see [link / reference]. Figure 3 As shown, specifically, during the curing process, the second solid inclusion with a larger shrinkage rate can act as the core layer, while the second solid inclusion with a smaller shrinkage rate can act as the skin layer. When the second solid inclusion shrinks, it is constrained and inhibited by the skin layer. When the compressive stress accumulated at the interface between the two phases exceeds a certain critical value, in order to release energy, the interface no longer remains flat, but instead buckling instability occurs, forming a periodic wave-shaped structure, i.e., a folded structure 1223.

[0029] It is understood that the first solid inclusion being disposed on the upper layer of the second solid inclusion means that the first solid inclusion is disposed on the side of the second solid inclusion away from the substrate 110. In this embodiment, the substrate 110 is disposed on the smallest layer, the second solid inclusion is disposed on the substrate 110, and the first solid inclusion is disposed on the second solid inclusion.

[0030] Specifically, the first solid component is an epoxy resin or a methacrylic resin, and the second solid component is also an epoxy resin or a methacrylic resin. The second solid component employs a high crosslinking density, resulting in a larger shrinkage rate. For example, when the second solid component is an epoxy resin, a multifunctional epoxy resin (such as phenolic epoxy) and a rigid curing agent (such as aromatic amine) can be used. When the second solid component is a methacrylic resin, a multifunctional methacrylic monomer (such as ethylene glycol dimethacrylate EGDMA, trimethylolpropane trimethacrylate TMPTMA) can be used. By employing a low crosslinking density, the first solid component has a relatively small shrinkage rate. For example, when the first solid component is an epoxy resin, a bifunctional epoxy resin (such as DGEBA) and a flexible curing agent (such as polyetheramine) can be used, or a flexible toughening agent can be added. When the first solid component is a methacrylic resin, it is modified using a monofunctional monomer (such as methyl methacrylate MMA) and the addition of a long-chain flexible monomer or elastomer (such as nitrile rubber). Within a certain range, the greater the difference between the shrinkage rate of the first solid component and the shrinkage rate of the second solid component, the more obvious the corresponding wrinkle morphology.

[0031] In one specific embodiment, the first organic encapsulation layer 1221 is disposed below the second organic encapsulation layer 1222, and the two film layers are in direct contact, forming a concave-convex transition interface on the wrinkled structure 1223. The wrinkled structure 1223 formed between the first organic encapsulation layer 1221 and the second organic encapsulation layer 1222, by creating a difference in refractive index between the two layers, can also utilize the scattering effect of the wrinkled structure 1223 to make the light emitted by the light-emitting unit 113 more uniform, especially the compensation light at large angles, which is beneficial to the uniformity of light emitted from the viewing angle. Simultaneously, the wrinkled structure 1223 can also scatter incident ambient light, thereby improving glare to a certain extent.

[0032] The first organic encapsulation layer 1221 has a higher refractive index than the second organic encapsulation layer 1222. The first organic encapsulation layer 1221 uses an organic encapsulation material with a higher refractive index, while the second organic encapsulation layer 1222 uses a relatively lower refractive index organic encapsulation material, forming a high-low refractive index interface. This allows incident ambient light to be scattered at a large angle and further absorbed by the light-shielding layer in the non-opening area, minimizing the amount of ambient light directly incident on the light-emitting unit 113. This prevents the ambient light from being reflected outwards by the emitting metal layer within the light-emitting unit 113, thus reducing display clarity.

[0033] In one specific embodiment, the thickness of the first organic encapsulation layer 1221 is less than the thickness of the second organic encapsulation layer 1222.

[0034] In this embodiment, the first organic encapsulation layer 1221 is disposed below the second organic encapsulation layer 1222, and the thickness of the first organic encapsulation layer 1221 is less than that of the second organic encapsulation layer 1222. This serves two purposes: firstly, it prevents the organic encapsulation ink from overflowing during the film formation process of the first organic encapsulation layer 1221. The degree of overflow is generally related to the thickness of the organic encapsulation ink; by making the first organic encapsulation layer 1221 thinner, its self-blocking overflow effect further reduces outward overflow. The second organic encapsulation layer 1222 is thicker, primarily used to improve the appearance of pinholes and cracks in the first inorganic encapsulation layer 121 and the second inorganic encapsulation layer 123.

[0035] See also Figure 2As shown, the display panel 100 also includes an encapsulation barrier 124, which surrounds the first organic encapsulation layer 1221 and the second organic encapsulation layer 1222 to block ink overflow during inkjet printing of the first organic encapsulation layer 1221 and the second organic encapsulation layer 1222; the first inorganic encapsulation layer 121 directly contacts the second inorganic encapsulation layer 123 in the area extending from the encapsulation barrier 124 to the edge of the display panel 100.

[0036] Generally, the encapsulation barrier 124 is located in the non-display area and is at a certain distance from the display area. The organic encapsulation layer 122 generally covers the display area and extends into the non-display area. The main function of the encapsulation barrier 124 is to prevent the organic encapsulation layer 122 from overflowing further to the edge of the display panel 100. Therefore, the side of the encapsulation barrier 124 closest to the display area generally has a first organic encapsulation layer 1221 and a second organic encapsulation layer 1222, but the side of the encapsulation barrier 124 furthest from the display area does not have a first organic encapsulation layer 1221 and a second organic encapsulation layer 1222.

[0037] This application uses a first organic encapsulation layer 1221 and a second organic encapsulation layer 1222, with a pleated structure 1223 to block the outflow of the second organic encapsulation layer 1222. Therefore, the number of encapsulation barrier dams 124 can be reduced. Compared to exemplary technologies that use at least two sets of encapsulation barrier dams 124 surrounding the display area, this embodiment only uses one set of encapsulation barrier dams 124 surrounding the display area. That is, the side of the encapsulation barrier dam 124 away from the display area in this embodiment does not have any flow-blocking structure. When the first inorganic encapsulation layer 121 and the second inorganic encapsulation layer 123 extend from the encapsulation barrier dam 124 away from the display area, they no longer need to cross the additional encapsulation barrier dam 124.

[0038] Furthermore, the surface of the encapsulation barrier 124 on the side away from the substrate 110 is lower than the surface of the second organic encapsulation layer 1222 on the side away from the substrate 110. Specifically, the film height of the encapsulation barrier 124 can be 1 μm to 2 μm lower than the film height of the organic encapsulation layer 122. This allows for the selection of materials that adhere better to each other when setting the film layers of the encapsulation barrier 124, resulting in a more stable encapsulation barrier 124 structure. The fact that the encapsulation barrier 124 does not need to be excessively tall also provides greater design flexibility for the transition area between the encapsulation barrier 124 and the edge of the display panel 100.

[0039] Figure 4 This is a schematic diagram of the first type of display panel according to the second embodiment of this application, see [link / reference]. Figure 4As shown, in addition to the effect of the organic encapsulation layer 122 in blocking the incident of external ambient light, this embodiment also provides an additional protective layer 130, which uses the pleated structure formed by organic materials to further block the incident of external ambient light.

[0040] Specifically, the display panel 100 further includes a color filter layer 140 and a protective layer 130; the color filter layer 140 is disposed on the encapsulation layer 120, and the protective layer 130 is disposed on the color filter layer 140; wherein, a microstructure 131 is disposed on the side of the protective layer 130 away from the substrate 110, and the microstructure 131 is used to diffusely reflect ambient light incident on the display panel 100; the display panel 100 includes a display area and a non-display area, the non-display area is disposed around the display area, and the microstructure 131 is disposed at least covering the display area.

[0041] In this embodiment, a microstructure 131 is provided on the side of the protective layer 130 away from the substrate 110. This microstructure 131, located on the light-emitting side of the display panel 100 and being the outermost part, reflects and scatters ambient light. This results in scattering and diffuse reflection when ambient light strikes the microstructure 131, significantly reducing specular reflection and thus improving glare. This eliminates the need for an anti-glare film, saving on process time and costs.

[0042] In this embodiment, the protective layer 130 serves as the outermost film layer on the light-emitting side of the display panel 100, meaning the protective layer 130 is disposed on the outermost side of the display panel 100. During the process of ambient light incident on the display panel 100, the ambient light must first pass through the protective layer 130. In this embodiment, by setting a microstructure 131 on the side of the protective layer 130 away from the substrate 110, the ambient light incident on the display panel 100 will immediately contact the microstructure 131. Through the action of the microstructure 131, most of the ambient light will not undergo specular reflection but diffuse reflection, thus preventing glare caused by specular reflection. In this embodiment, the protective layer 130, as the outermost layer of the display panel 100, provides protection and improves the unevenness of the outermost film layer of the display panel 100 caused by the placement of devices. Simultaneously, the microstructure 131 on the side of the protective layer 130 away from the substrate 110 also has a scattering effect, scattering the emitted light from the light-emitting unit 113 before emission. Compared to a flat surface design for the protective layer 130, the refractive index of the protective layer 130 is higher than that of air. This causes the large-angle emitted light from the light-emitting unit 113 to be deflected at a large angle when it enters the interface between the protective layer 130 and air, and may even result in total internal reflection, preventing it from escaping, which is detrimental to light extraction. By setting the microstructure 131, the large-angle emitted light is deflected in a direction perpendicular to the substrate 110, thereby improving the light extraction efficiency of the display panel 100.

[0043] Secondly, by setting the color filter section 141, most of the ambient light that does not conform to the wavelength of the corresponding color filter section 141 is filtered out. The second filtering effect of the color filter section 141 further reduces the incidence of ambient light. Finally, the pleated structure 1223 provided between the first organic encapsulation layer 1221 and the second organic encapsulation layer 1222 further disperses the ambient light. This application solves the problem of ambient light incidence through the above three-layer structure, thereby improving the quality of the display panel 100.

[0044] Specifically, the protective layer 130 is formed of an organic material; the organic material includes at least a first solid component and a second solid component; the first solid component is disposed on the upper layer of the protective layer 130, and the second solid component is disposed on the lower layer of the protective layer 130; the curing shrinkage rate of the first solid component is less than the curing shrinkage rate of the second solid component; the first solid component is used to form wrinkles with the second solid component to form the microstructure 131 after shrinkage occurs during the curing stage of the protective layer 130.

[0045] In this embodiment, the main advantage lies in the difference in shrinkage rates between the first and second solid inclusions. The first solid inclusion, located in the upper layer, has a smaller shrinkage rate than the second solid inclusion, located in the lower layer. During the curing stage of the wet process for the protective layer 130, the different shrinkage rates of the first and second solid inclusions cause the upper component to buckle and deform under the tensile or compressive stress of the lower component, forming a wrinkled morphology and thus creating the microstructure 131. Both the protective layer 130 and the organic encapsulation layer 122 in this application are made of organic materials, and both can be doped with the first and second solid inclusions to form the wrinkled microstructure 131.

[0046] The first solid component is an epoxy resin or a methacrylic resin, and the second solid component is an epoxy resin or a methacrylic resin. That is, the first and second solid components used in this embodiment are similar to those used in the organic encapsulation layer 122 described above, and will not be repeated here.

[0047] The difference between the protective layer 130 and the organic encapsulation layer 122 is that the protective layer 130 is disposed on the light-emitting surface of the display panel 100 and is located on the outermost side of the display panel 100. The main function of the microstructure 131 on the side of the protective layer 130 away from the substrate 110 is to prevent ambient light from entering and to prevent specular reflection. Therefore, the size of the microstructure 131 on the protective layer 130 needs to be set to be more suitable for diffuse reflection.

[0048] Specifically, the microstructure 131 includes multiple wrinkled protrusions 132, the width L of which is 3 to 10 micrometers, and the thickness H of which is 1 to 5 micrometers. In this embodiment, by adjusting the ratio of the above materials and shrinkage rate, the wrinkled protrusions 132 of the microstructure 131 meet the above parameters, so that the side of the protective layer 130 away from the substrate 110 no longer experiences specular reflection, but rather diffuse reflection. Importantly, the wrinkled protrusions 132 do not affect the emitted light from the light-emitting unit 113, and to a certain extent, they can also scatter the emitted light, resulting in a wider viewing angle and better display effect at a wider viewing angle for the display panel 100.

[0049] It is understood that this embodiment only uses the first and second solid inclusions as examples for illustration. In practice, by adjusting the different component materials and ratios in the protective layer 130, different morphologies of wrinkles can be obtained, thereby achieving different optical effects. Specifically, the curing shrinkage rate of the first solid inclusion is at least 3% less than the curing shrinkage rate of the second solid inclusion; so that the dimensions of the microstructure 131 satisfy the requirement that the width of the wrinkled protrusions 132 is 3 micrometers to 10 micrometers, and the thickness of the wrinkled protrusions 132 is 1 micrometer to 5 micrometers.

[0050] Specifically, the color filter layer 140 includes color filter portions 141 disposed in multiple opening areas 112 and a light-shielding layer 142 disposed in non-opening areas. The protective layer 130 provided in this application covers the color filter portions 141 and extends onto the light-shielding layer 142, completely covering the light-shielding layer 142, thereby reducing the small amount of ambient light reflection on the light-shielding layer 142.

[0051] Figure 5 This is a schematic diagram of a second type of display panel according to a second embodiment of this application. See also: Figure 5 As shown, in another embodiment, ceramic particles 133, including silicon oxide particles, can be filled within the protective layer 130. The refractive index of the ceramic particles 133 is generally higher than that of the protective layer 130. This allows the emitted light from the light-emitting unit 113 to be scattered by the ceramic particles 133 within the protective layer 130 as it passes through, thereby increasing the angle of the emitted light and expanding the large-angle optical path. The main function of the ceramic particles 133 is to change the optical path, thereby increasing the luminous efficiency.

[0052] Figure 6 This is a schematic diagram of the display device of this application, see below. Figure 6 As shown, this application also discloses a display device, the display device 200 including a driving circuit 210 and a display panel 100 in any of the above embodiments, wherein the driving circuit 210 is used to drive the display panel 100 to display.

[0053] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0054] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate; a pixel definition layer disposed on the substrate and provided with a plurality of opening regions; a plurality of light emitting units respectively disposed in the plurality of opening regions; an encapsulation layer disposed on the plurality of light emitting units and used for encapsulating the light emitting units; wherein the encapsulation layer comprises a first organic encapsulation layer and a second organic encapsulation layer, the first organic encapsulation layer is disposed below the second organic encapsulation layer; the first organic encapsulation layer is formed by using an organic encapsulation material comprising at least a first solid content and a second solid content, and a corrugated structure is formed on a side of the first organic encapsulation layer close to the second organic encapsulation layer; the corrugated structure is used for blocking overflow of ink used for forming the second organic encapsulation layer in an inkjet printing process of the second organic encapsulation layer.

2. The display panel of claim 1, wherein, the first solid content is disposed in an upper layer of the first organic encapsulation layer, and the second solid content is disposed in a lower layer of the first organic encapsulation layer; a solidification shrinkage rate of the first solid content is less than a solidification shrinkage rate of the second solid content; the first solid content is used for forming a wrinkle with the second solid content after shrinkage of the protective layer in a solidification stage to form the corrugated structure.

3. The display panel of claim 2, wherein, the first solid content is an epoxy resin material or a methacrylic resin material, and the second solid content is an epoxy resin material or a methacrylic resin material; wherein a thickness of the first organic encapsulation layer is less than a thickness of the second organic encapsulation layer.

4. The display panel of claim 2, wherein, the encapsulation layer further comprises a first inorganic encapsulation layer and a second inorganic encapsulation layer, the first inorganic encapsulation layer is disposed on the light emitting units, the first organic encapsulation layer is disposed on the first inorganic encapsulation layer, and the second inorganic encapsulation layer is disposed on the second organic encapsulation layer; the display panel further comprises an encapsulation blocking dam, the encapsulation blocking dam is disposed around the first organic encapsulation layer and the second organic encapsulation layer, and is used for blocking overflow of ink in inkjet printing of the first organic encapsulation layer and the second organic encapsulation layer; an area extending from the encapsulation blocking dam to an edge of the display panel, the first inorganic encapsulation layer is directly in contact with the second inorganic encapsulation layer; a surface of the encapsulation blocking dam away from the substrate is lower than a surface of the second organic encapsulation layer away from the substrate.

5. The display panel of claim 2, wherein, the display panel further comprises a color filter layer and a protective layer; the color filter layer is disposed on the encapsulation layer, and the protective layer is disposed on the color filter layer; wherein a side of the protective layer away from the substrate is provided with a microstructure, the microstructure is used for causing ambient light incident to the display panel to be diffusely reflected; the display panel comprises a display area and a non-display area, the non-display area is disposed around the display area, and the microstructure at least covers the display area.

6. The display panel of claim 5, wherein, the protective layer is formed by using an organic material, and the organic material comprises at least a first solid content and a second solid content; the first solid content is disposed in an upper layer of the protective layer, and the second solid content is disposed in a lower layer of the protective layer; a solidification shrinkage rate of the first solid content is less than a solidification shrinkage rate of the second solid content; The first solid content is used to form a wrinkle with the second solid content after a shrinkage occurs in a curing stage of the protective layer to form the microstructure.

7. The display panel of claim 6, wherein, The curing shrinkage rate of the first solid content is at least 3% less than the curing shrinkage rate of the second solid content. The first solid content is an epoxy resin material or a methacrylic resin material, and the second solid content is an epoxy resin material or a methacrylic resin material.

8. The display panel of claim 6, wherein, The protective layer is arranged on a light-out surface of the display panel and is located at an outermost side of the display panel. The microstructure includes a plurality of wrinkle protrusions, the width of the wrinkle protrusions is 3-10 microns, and the thickness of the wrinkle protrusions is 1-5 microns.

9. The display panel of claim 5, wherein, The refractive index of the first organic encapsulation layer is higher than the refractive index of the second organic encapsulation layer.

10. A display device, characterized by comprising: The display panel includes a driving circuit and the display panel of any one of claims 1-9, wherein the driving circuit is used to drive the display panel to display.

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