Display panel and display device

Abstract

The invention provides a display panel and a display device. The problem that in the prior art, a display product is low in reliability is solved. The display panel comprises a substrate; the first electrode layer comprises first electrodes which are arranged on one side of the substrate at intervals; the pixel definition layer is arranged on the first electrode layer, a part of the first electrode is exposed to form a pixel opening, and the pixel definition layer covers the edge part of the first electrode; wherein the pixel definition layer comprises a plurality of sub-layers, and the thickness of at least one sub-layer is larger than that of the first electrode.

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] In recent years, the aperture ratio of display products has been increasing, the display effect has been improving, and display technology has achieved rapid development. However, the reliability of display products still needs to be improved. Summary of the invention

[0003] In view of this, embodiments of the present application provide a display panel and a display device, which solve the problem of low reliability of display products in the prior art.

[0004] The first aspect of the present application provides a display panel, comprising: a substrate; a first electrode layer, comprising a first electrode, the first electrode being arranged at intervals on one side of the substrate; and a pixel definition layer, which is arranged on the first electrode layer and exposes a portion of the first electrode to form a pixel opening, and the pixel definition layer covers the edge portion of the first electrode; wherein the pixel definition layer comprises a plurality of sublayers, and the thickness of at least one sublayer is greater than the thickness of the first electrode. The advantage is that: the at least one sublayer is ensured to have good step coverage, so that the film is well formed at the climbing position and no cracks are generated, thereby improving the reliability of the display panel.

[0005] In combination with the first aspect, in some possible implementations, the sublayer is an inorganic material.

[0006] In combination with the first aspect, in some possible implementations, the multiple sublayers include a first sublayer and a second sublayer stacked in sequence in a direction away from the substrate; preferably, the ratio of the thickness of the first sublayer and the thickness of the second sublayer to the thickness of the first electrode is respectively in the range of 0.8 to 6.25; preferably, the thickness of the first sublayer is greater than or equal to 1000 microns and less than or equal to 5000 microns; preferably, the thickness of the second sublayer is greater than or equal to 500 microns and less than or equal to 3000 microns.

[0007] In combination with the first aspect, in some possible implementations, the thickness of the first sublayer is greater than the thickness of the first electrode; preferably, the thickness of the first sublayer is greater than or equal to 2000 microns and less than or equal to 5000 microns.

[0008] In combination with the first aspect, in some possible implementations, the first sublayer contacts the first electrode. The advantage is that it can ensure that the first sublayer has good step coverage, so that cracks will not be generated when the edge of the first electrode climbs. At the same time, the first sublayer can compensate for the step height formed by the first electrode, reducing the difficulty of climbing for the second sublayer.

[0009] In combination with the first aspect, in some possible implementations, the thickness of the second sublayer is greater than the thickness of the first electrode; preferably, the thickness of the second sublayer is greater than or equal to 1000 microns and less than or equal to 2500 microns.

[0010] In combination with the first aspect, in some possible implementations, the film-forming property of the first sublayer is better than that of the second inorganic sublayer; and / or the etching resistance of the second sublayer is better than that of the first inorganic sublayer. The advantage is that the thickness requirement for the first sublayer 131 is relatively low, which is conducive to the thinning of the product. The etching resistance of the second sublayer is better than that of the first sublayer, and the etching resistance of the pixel definition layer can be improved, further improving the reliability of the display panel.

[0011] In combination with the first aspect, in some possible implementations, the materials of the first sublayer and the second sublayer are different; preferably, the material of the first sublayer includes silicon nitride; preferably, the material of the second sublayer includes silicon oxide.

[0012] In combination with the first aspect, in some possible implementations, the first electrode includes a first sub-electrode layer and a second sub-electrode layer stacked, the first sub-electrode layer is located on the side of the second sub-electrode layer close to the substrate, and the orthographic projection of the first sub-electrode layer on the substrate is located within the orthographic projection range of the second sub-electrode layer on the substrate; preferably, the first electrode also includes a third sub-electrode layer, and the third sub-electrode layer is located on the side of the second sub-electrode layer away from the substrate; preferably, the first sub-electrode layer and the third sub-electrode layer are made of the same material; preferably, the thickness of the first sub-electrode layer is greater than the thickness of the third sub-electrode layer; preferably, the material of the first sub-electrode layer includes ITO; preferably, the material of the second sub-electrode layer includes Ag. The advantage is that, for the application scenario where the undercut structure is formed on the side wall of the first electrode, the pixel definition layer is more prone to cracks. By setting the thickness of at least one sub-layer in the pixel definition layer to be greater than the thickness of the first electrode, the probability of cracks can be reduced and the reliability of the display panel can be improved.

[0013] In combination with the first aspect, in some possible implementations, a distance between an edge of an orthographic projection of the first sub-electrode layer on the substrate and an edge of an orthographic projection of the second sub-electrode layer on the substrate is greater than or equal to 0.1 micrometers and less than or equal to 1 micrometer.

[0014] In combination with the first aspect, in some possible implementations, the pixel definition layer includes a groove, the opening of the groove is located on a side of the pixel definition layer facing away from the substrate, and the orthographic projection of the groove on the substrate is located between first electrodes of adjacent sub-pixels.

[0015] In combination with the first aspect, in some possible implementations, the display panel also includes an isolation structure located on the side of the pixel definition layer facing away from the substrate; the isolation structure encloses a plurality of isolation openings, and the pixel openings are located within the isolation openings; the display panel also includes a second electrode and a light-emitting layer, the second electrode is located on the side of the first electrode facing away from the substrate, the light-emitting layer is located between the first electrode and the second electrode, and adjacent light-emitting layers and adjacent second electrodes are disconnected at the isolation structure.

[0016] In combination with the first aspect, in some possible implementations, the isolation structure includes a first part and a second part, the first part is located on a side of the second part close to the substrate, and the second part extends outward along the side wall edge of the first part; preferably, the isolation structure also includes a third part, the third part is located on a side of the first part close to the substrate, and the third part extends outward along the side wall edge of the first part.

[0017] In combination with the first aspect, in some possible implementations, the pixel definition layer includes a groove, the opening of the groove is located on the side of the pixel definition layer facing away from the substrate, the orthographic projection of the groove on the substrate is located between adjacent first electrodes; the orthographic projection of the first portion on the substrate is located within the range of the orthographic projection of the groove on the substrate; or the orthographic projection of the first portion on the substrate covers the orthographic projection of the groove on the substrate.

[0018] In combination with the first aspect, in some possible implementations, the display panel also includes an inorganic encapsulation portion, which is located on the side of the second electrode facing away from the substrate; adjacent inorganic encapsulation portions are disconnected on the side of the isolation structure facing away from the substrate; preferably, the display panel also includes an organic encapsulation layer, which is located on the side of the inorganic encapsulation portion facing away from the substrate, and the orthographic projection of the organic encapsulation layer on the substrate covers the orthographic projection of the inorganic encapsulation portion and the isolation structure on the substrate; preferably, the display panel also includes an inorganic encapsulation layer, which is located on the side of the organic encapsulation layer facing away from the substrate, and the orthographic projection of the inorganic encapsulation layer on the substrate covers the orthographic projection of the organic encapsulation layer on the substrate.

[0019] A second aspect of the present application provides a display device, comprising a display panel provided by any of the above embodiments.

[0020] According to the display panel and display device provided by the embodiments of the present application, since the edge portion of the pixel definition layer extending from the substrate to the first electrode faces away from the substrate, that is, the pixel definition layer will climb the side wall of the first electrode. By setting the thickness of at least one sublayer in the pixel definition layer to be greater than the thickness of the first electrode, it can be ensured that the at least one sublayer has good step coverage, so that the film is well formed at the climbing position without cracks, thereby improving the reliability of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1a This is a schematic diagram of the top structure of the display panel provided in the first embodiment of the present application.

[0022] Figure 1b for Figure 1a The cross-sectional structure diagram of the display panel along line A1A2 is shown.

[0023] Figure 2 A schematic diagram of the cross-sectional structure of a display panel provided in the second embodiment of the present application.

[0024] Figure 3 A schematic diagram of the cross-sectional structure of a display panel provided in the third embodiment of the present application.

[0025] Figure 4 A schematic diagram of the cross-sectional structure of a display panel provided in the fourth embodiment of the present application.

[0026] Figure 5 A schematic diagram of the cross-sectional structure of a display panel provided in the fifth embodiment of the present application.

[0027] Figure 6 A schematic diagram of the cross-sectional structure of a display panel provided in the sixth embodiment of the present application.

[0028] Figure 7 A schematic diagram of the cross-sectional structure of a display panel provided in the seventh embodiment of the present application.

[0029] Figure 8 A schematic diagram of the cross-sectional structure of a display panel provided in the eighth embodiment of the present application.

[0030] Fig. 9 A schematic diagram of the structure of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0031] In the related technology, the display industry uses photolithography technology to replace the fine metal mask technology to achieve pixel-level packaging and improve the aperture ratio of the product. However, after in-depth research, the inventors found that the pixel definition layer in the display product is prone to cracks, which in turn causes water vapor to intrude into the pixel area through the cracks, causing pixel failure and affecting the reliability of the display product.

[0032] In view of this, the embodiments of the present application provide a display panel and a display device, by setting the pixel definition layer to multiple sub-layers, and setting the thickness of at least one sub-layer to be greater than the thickness of the first electrode of the light-emitting device covered by the pixel definition layer, it is ensured that the pixel definition layer extends from the substrate to the edge portion covering the first electrode. The at least one sub-layer has good step coverage and will not generate cracks due to the steps formed by the thickness of the first electrode, thereby improving the reliability of the display product.

[0033] 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.

[0034] In the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is understood that when a structure is referred to as being "on or under" another structure, the structure may be directly on or under the other structure, or there may be intermediate structures. The same reference numerals always indicate the same structure. The structures mentioned herein include any of a film layer, an element, a device, a component, and an assembly.

[0035] When a structure is referred to as being “connected” to another structure, the structure may be directly connected to the other structure or indirectly connected to the other structure with one or more intervening structures interposed therebetween.

[0036] Figure 1a This is a schematic diagram of the top structure of the display panel provided in the first embodiment of the present application. Figure 1b for Figure 1a The cross-sectional structure diagram of the display panel along the A1A2 line is shown. Figure 1a and Figure 1b As shown, the display panel includes: a substrate 11, a first electrode layer and a pixel definition layer 13. The first electrode layer includes a first electrode 121, and the first electrode 121 is arranged at intervals on one side of the substrate 11. The pixel definition layer 13 is arranged on the first electrode layer, and a portion of the first electrode 121 is exposed to form a pixel opening, and the pixel definition layer 13 covers the edge portion of the first electrode 121. Among them, the pixel definition layer 13 includes a plurality of sub-layers, and the thickness of at least one sub-layer is greater than the thickness of the first electrode 121.

[0037] The substrate 11 may be a substrate substrate, or an array substrate on which a pixel circuit is arranged. For example, the substrate substrate may be a glass-based substrate. For example, the substrate substrate may include an organic resin material such as epoxy resin, triazine, silicone resin or polyimide. For example, the substrate substrate may be a FR4 type printed circuit board (PCB), or may be a flexible PCB that is easily deformed. For example, the substrate substrate may include a ceramic material such as silicon nitride, aluminum nitride or aluminum oxide, or may include a metal or a metal compound. For example, the pixel circuit may be a 7T1C pixel circuit, an 8T1C pixel circuit, etc.

[0038] The display panel further includes at least one light-emitting functional layer 122 and a second electrode 123, and the first electrode 121, at least one light-emitting functional layer 122 and the second electrode 123 are sequentially stacked in a direction away from the substrate 11. The first electrode 121, at least one light-emitting functional layer 122 and the second electrode 123 stacked sequentially constitute a sub-pixel 12. The sub-pixel 12 can be an organic light-emitting diode (OLED), a micro light-emitting diode (Micro LED), a quantum dot light-emitting diode (QLED), etc. The sub-pixel 12 can be a light-emitting device of various colors, such as a red light-emitting device R, a green light-emitting device G, a blue light-emitting device B, etc.

[0039] Specifically, the first electrode 121 is located on one side of the substrate 11, and the pixel definition layer 13 is located between adjacent first electrodes 121, and extends from between adjacent first electrodes 121 to cover the edge portion of the first electrode 121. The pixel definition layer 13 encloses a pixel opening, and the pixel opening exposes the central portion of the first electrode 121 that is not covered by the pixel definition layer 13. Exemplarily, the first electrode 121 is an anode, and the second electrode 123 is a cathode. Alternatively, the first electrode 121 is a cathode, and the second electrode 123 is an anode.

[0040] At least one light-emitting functional layer 122 includes a light-emitting layer, and may also include at least one of a hole injection layer, a hole transport layer, and an electron blocking layer located between the anode and the light-emitting layer, and at least one of an electron injection layer, an electron transport layer, and a hole blocking layer located between the cathode and the light-emitting layer. Exemplarily, one or more of the hole injection layer, the hole transport layer, the electron blocking layer, the hole blocking layer, the electron transport layer, and the electron injection layer of all sub-pixels 12 may be a common layer connected together, and the light-emitting layers of adjacent sub-pixels 12 may overlap slightly, or may be isolated from each other.

[0041] Since the edge portion of the pixel definition layer 13 extending from the substrate 11 to the first electrode 121 is away from the substrate 11, that is, the pixel definition layer 13 will climb the side wall of the first electrode 121. By setting the thickness of at least one sublayer in the pixel definition layer 13 to be greater than the thickness of the first electrode 121, it can be ensured that the at least one sublayer has good step coverage, so that the film is well formed at the climbing position without cracks, thereby improving the reliability of the display panel.

[0042] In one embodiment, the material of the sub-layer is an inorganic material.

[0043] In one embodiment, as shown in Fig. 1, the plurality of sublayers include a stacked first sublayer 131 and a second sublayer 132, and the first sublayer 131 is located on a side of the second sublayer 132 close to the substrate 11. That is, the pixel definition layer 13 in this embodiment adopts a double-layer design.

[0044] Exemplarily, the film-forming property of the first sublayer 131 is better than that of the second sublayer 132. That is, under the same thickness condition, the first sublayer 131 can better cover the step structure formed by the first electrode 121 than the second sublayer 132 without generating cracks. On the contrary, to obtain the same step coverage effect, the thickness of the first sublayer 131 is required to be thinner than that of the second sublayer 132, that is, the thickness requirement for the first sublayer 131 is relatively low, which is conducive to the thinning of the product. In addition, the good film-forming property is reflected in the good coverage of the formed film, which is more dense and more conducive to isolating water vapor.

[0045] Exemplarily, the second sublayer 132 has better etching resistance than the first sublayer 131. Since the side of the pixel definition layer 13 facing away from the substrate 11 will be etched during the display panel manufacturing process, by selecting a material with stronger etching resistance as the second sublayer 132, the etching resistance of the pixel definition layer 13 can be improved, and the reliability of the display panel can be further improved.

[0046] Exemplarily, the first sub-layer 131 and the second sub-layer 132 are made of different materials. For example, the material of the first sub-layer 131 includes silicon nitride, and the material of the second sub-layer 132 includes silicon oxide.

[0047] Exemplarily, the thickness ratio of the first sublayer 131 and the second sublayer 132 to the first electrode is in the range of 0.8 to 6.25.

[0048] Exemplarily, the first thickness D1 of the first sublayer 131 is greater than or equal to 1000 microns and less than or equal to 5000 microns. For example, the first thickness D1 of the first sublayer 131 is 1000 microns, 2000 microns, 3000 microns, 4000 microns, 5000 microns, etc. It should be noted that when the first thickness D1 of the first sublayer 131 is within this numerical range, the first thickness D1 of the first sublayer 131 may be greater than the thickness d of the first electrode 121, may be less than the thickness d of the first electrode 121, or may be equal to the thickness d of the first electrode 121.

[0049] Exemplarily, the second thickness D2 of the second sublayer 132 is greater than or equal to 500 microns and less than or equal to 3000 microns. For example, the second thickness D2 of the second sublayer 132 is 500 microns, 1000 microns, 2000 microns, 3000 microns, etc. It should be noted that when the second thickness D2 of the second sublayer 132 is within this numerical range, the second thickness D2 of the second sublayer 132 may be greater than the thickness d of the first electrode 121, may be less than the thickness d of the first electrode 121, or may be equal to the thickness d of the first electrode 121.

[0050] Figure 2 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided in the second embodiment of the present application. Figure 2 The difference between the display panel shown in FIG. 1 and the display panel shown in FIG. 1 is that, in the present embodiment, the first thickness D1 of the first sublayer 131 is greater than the thickness d of the first electrode 121 .

[0051] In one embodiment, when the first thickness D1 of the first sublayer 131 is greater than the thickness d of the first electrode 121, the first thickness D1 of the first sublayer 131 is greater than or equal to 2000 micrometers and less than or equal to 5000 micrometers. For example, the first thickness D1 of the first sublayer 131 is 2000 micrometers, 3000 micrometers, 4000 micrometers, 5000 micrometers, etc.

[0052] In one embodiment, the first sublayer 131 is in contact with the first electrode 121. The first thickness D1 of the first sublayer 131 in contact with the first electrode 121 is set to be greater than the thickness d of the first electrode 121. In this case, it can be ensured that the first sublayer 131 has good step coverage, so that cracks will not be generated when the edge of the first electrode 121 climbs. At the same time, the first sublayer 131 can compensate for the step height formed by the first electrode 121, reducing the difficulty of climbing for the second sublayer 132.

[0053] In one embodiment, the second thickness D2 of the second sub-layer 132 is less than the thickness d of the first electrode 121 .

[0054] Figure 3 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided in the third embodiment of the present application. Figure 3 The difference between the display panel shown in FIG. 1 and the display panel shown in FIG. 1 is that, in the present embodiment, the second thickness D2 of the second sub-layer 132 is greater than the thickness d of the first electrode 121 .

[0055] In one embodiment, when the second thickness D2 of the second sublayer 132 is greater than the thickness d of the first electrode 121, the second thickness D2 of the second sublayer 132 is greater than or equal to 1000 micrometers and less than or equal to 2500 micrometers. For example, the thickness of the second sublayer 132 is 1000 micrometers, 1500 micrometers, 2000 micrometers, 2500 micrometers, etc.

[0056] In one embodiment, the first thickness D1 of the first sub-layer 131 is less than the thickness d of the first electrode 121 .

[0057] Figure 4 FIG. 4 is a schematic diagram of a cross-sectional structure of a display panel provided in the fourth embodiment of the present application. Figure 4 As shown, the difference between the display panel provided in this embodiment and the display panel provided in any of the above embodiments is that, in this embodiment, the first electrode 121 includes a first sub-electrode layer 1211 and a second sub-electrode layer 1212 stacked, the first sub-electrode layer 1211 is located on the side of the second sub-electrode layer 1212 close to the substrate 11, and the orthographic projection of the first sub-electrode layer 1211 on the substrate 11 is located within the orthographic projection range of the second sub-electrode layer 1212 on the substrate 11. That is, an inwardly concave groove is formed on the side wall of the first electrode 121. In this case, the pixel definition layer 13 is more likely to crack when climbing the side wall of the first electrode 121. According to the display panel provided in this embodiment, by setting the thickness of at least one sub-layer in the pixel definition layer 13, such as the first sub-layer 131 and / or the second sub-layer 132, to be greater than the thickness of the first electrode 121, it is possible to avoid cracks in the at least one sub-layer, thereby improving the reliability of the display panel.

[0058] In one embodiment, the first electrode 121 further includes a third sub-electrode layer 1213, and the third sub-electrode layer 1213 is located on the side of the second sub-electrode layer 1212 away from the substrate 11. Exemplarily, the materials of the first sub-electrode layer 1211 and the third sub-electrode layer 1213 are the same. For example, the materials of the first sub-electrode layer 1211 and the third sub-electrode layer 1213 include ITO, and the material of the second sub-electrode layer 1212 includes Ag. Exemplarily, the thickness of the first sub-electrode layer 1211 is greater than the thickness of the third sub-electrode layer 1213. In this case, in the process of patterning the first electrode 121, the side engraving depth of the first sub-electrode layer 1211 is greater than the side engraving depth of the third sub-electrode layer 1213, and the side engraving depth of the second sub-electrode layer 1212 and the side engraving depth of the third sub-electrode layer 1213 are not much different.

[0059] In one embodiment, the distance D3 between the edge of the orthographic projection of the first sub-electrode layer 1211 on the substrate 11 and the edge of the orthographic projection of the second sub-electrode layer 1212 on the substrate 11 is greater than or equal to 0.1 micrometers and less than or equal to 1 micrometer. For example, the distance D3 is 0.3 micrometers, 0.5 micrometers, 0.7 micrometers, etc.

[0060] Figure 5 FIG. 5 is a schematic diagram of a cross-sectional structure of a display panel provided in the fifth embodiment of the present application. Figure 5 As shown, in this embodiment, the pixel definition layer 13 includes a groove G, the opening of the groove G is located on the side of the pixel definition layer 13 away from the substrate 11, and the orthographic projection of the groove G on the substrate 11 is located between adjacent first electrodes 121. In this embodiment, the pixel definition layer 13 is a composite film layer stacked with multiple film layers, and the multiple film layers are all inorganic layers. Due to the limitations of the inorganic layer film forming process, the thickness of the pixel definition layer 13 is uniform everywhere. In this case, the distance between the portion of the pixel definition layer 13 located between the adjacent first electrodes 121 and the substrate 11 is smaller than the distance between the portion of the pixel definition layer 13 located on the side of the first electrode 121 away from the substrate 11 and the substrate 11, thereby forming a groove G between the adjacent first electrodes 121 in the pixel definition layer 13.

[0061] In this embodiment, if Figure 5 As shown, the display panel further includes an isolation structure 14, which is located on the side of the pixel definition layer 13 away from the substrate 11. The isolation structure 14 encloses a plurality of isolation openings, and the pixel openings are located in the isolation openings. The display panel further includes a second electrode 123 and a light-emitting layer, the second electrode 123 is located on the side of the first electrode 121 away from the substrate 11, and the light-emitting layer is located between the first electrode 121 and the second electrode 123. Adjacent light-emitting layers and adjacent second electrodes 123 are disconnected at the isolation structure 14, respectively.

[0062] Specifically, the isolation structure 14 encloses a plurality of isolation openings, the isolation openings are connected to the pixel openings, and the orthographic projections of the isolation openings on the substrate 11 cover the orthographic projections of the pixel openings on the substrate 11. The isolation structure 14 has a partitioning function, and is used to partition at least one light-emitting functional layer 122 and the second electrode 123 of adjacent sub-pixels 12.

[0063] In one embodiment, the isolation structure 14 includes a first part 141 and a second part 142, the first part 141 is located on the side of the second part 142 close to the substrate 11, and the second part 142 extends outward along the sidewall edge of the first part 141. In this case, the cross-sectional shape of the isolation structure 14 can be T-shaped. The first part 141 can be designed as an independent film layer, that is, there is no physical interface inside the first part 141, and each part is composed of the same material. Alternatively, the first part 141 can be designed to be composed of at least two film layers stacked. For example, the first part 141 is formed by stacking two conductive film layers. The materials of the two conductive film layers can be molybdenum and aluminum, respectively, and the conductive film layer composed of molybdenum is located between the substrate 11 and the conductive film layer composed of aluminum. The material of the second part 142 can be an inorganic material, an organic material, or a metal material. In the case where the second part 142 is a metal material, the material of the second part 142 can be titanium.

[0064] In one embodiment, the isolation structure 14 includes a conductive portion, for example, the first portion 141 is a conductive portion. The second electrode 123 overlaps the conductive portion to achieve electrical connection between the second electrodes 123 of adjacent sub-pixels 12 .

[0065] like Figure 5 As shown, in this embodiment, the orthographic projection of the first portion 141 on the substrate 11 is located within the orthographic projection range of the groove G on the substrate 11. In this case, the flatness of the first portion 141 is better, and there is no overlap between the first portion 141 and the first electrode 121 in the thickness direction of the substrate 11, so that the coupling capacitance between the first portion 141 and the first electrode 121 can be reduced.

[0066] Figure 6 FIG. 6 is a schematic diagram of a cross-sectional structure of a display panel provided in the sixth embodiment of the present application. Figure 6 The display panel and Figure 5 The difference of the display panel shown is that, in this embodiment, the orthographic projection of the first portion 141 on the substrate 11 covers the orthographic projection of the groove G on the substrate 11 .

[0067] Figure 7 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided in the seventh embodiment of the present application. Figure 7 The display panel and Figure 5 , Figure 6 The difference between the display panels shown is that Figure 6 As an example of the display panel shown in FIG. 1 , the isolation structure 14 in the display panel provided in this embodiment is Figure 6 The isolation structure 14 in the display panel shown further includes a third portion 143, which is located on the side of the first portion 141 close to the substrate 11 and extends outward along the sidewall edge of the first portion 141. In this case, the cross-sectional shape of the isolation structure 14 may be an I-shaped shape.

[0068] Exemplarily, the material of the third portion 143 is aluminum. In this case, the first portion 141 may be an independent film layer, and the material of the first portion 141 may be molybdenum.

[0069] The composition, preparation, etc. of the isolation structure (also called partition structure) 14 are disclosed in patents CN118251982A, 202410864269.8, patent PCT / CN2024 / 098407, patent PCT / CN2024 / 102783, patent PCT / CN2024 / 098217, patent PCT / CN2024 / 099419, patent PCT / CN2024 / 099072, patent CN117979755A, patent CN117998900A, patent CN117062489A, and patent CN11

[0070] 7580403A, patent CN116583155A, patent CN116669477A, ​​patent CN117396039A, patent CN116669480A, patent CN116600606A, and patent CN117500332A, the contents of which are incorporated into this application by reference for reference.

[0071] Figure 8 FIG. 8 is a schematic diagram of a cross-sectional structure of a display panel provided in the eighth embodiment of the present application. Figure 8 The difference between the display panel shown and the display panel provided in any of the above embodiments is that, in this embodiment, the display panel further includes an inorganic encapsulation portion 151, which is located on the side of the second electrode 123 away from the substrate 11. Adjacent inorganic encapsulation portions 151 are disconnected on the side of the isolation structure 14 away from the substrate 11. Exemplarily, the inorganic encapsulation portions 151 correspond to the sub-pixels 12 one by one.

[0072] In one embodiment, the display panel further includes an organic encapsulation layer 152 located on the side of the inorganic encapsulation portion 151 away from the substrate 11 , and the orthographic projection of the organic encapsulation layer 152 on the substrate 11 covers the orthographic projections of the inorganic encapsulation portion 151 and the isolation structure 14 on the substrate 11 .

[0073] In one embodiment, the display panel further includes an inorganic encapsulation layer 153 located on a side of the organic encapsulation layer 152 away from the substrate 11 , and the orthographic projection of the inorganic encapsulation layer 152 on the substrate 11 covers the orthographic projection of the organic encapsulation layer 152 on the substrate 11 .

[0074] In one embodiment, the display panel further includes a pixel circuit 20 located between the sub-pixel 12 and the substrate 11. The pixel circuit 20 is, for example, a 7T1C pixel circuit.

[0075] The present application also provides a display device. Fig. 9This is a schematic diagram of the structure of a display device provided in one embodiment of the present application. Fig. 9 As shown, the display device 90 includes the display panel provided by any of the above embodiments.

[0076] The display device 90 is a product with an image display function. For example, the display device 90 can be used to display static images, such as pictures or photos. The display device 90 can also be used to display dynamic images, such as videos.

[0077] The display device 90 may be a laptop computer, a mobile phone, a handheld or portable computer, a camera, a camcorder, a vehicle-mounted intelligent central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0078] In addition, the display device 90 may also have functions such as taking pictures, recording, fingerprint recognition, face recognition, etc. Accordingly, the display device 90 also includes at least one functional module for realizing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, etc.

[0079] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0080] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A display panel, characterized in that: include: substrate; A first electrode layer, comprising a plurality of first electrodes, wherein the plurality of first electrodes are arranged at intervals on one side of the substrate; as well as A pixel definition layer is disposed on the first electrode layer and exposes a portion of the first electrode to form a pixel opening, wherein the pixel definition layer covers an edge portion of the first electrode; The pixel definition layer includes a plurality of sub-layers, and a thickness of at least one of the sub-layers is greater than a thickness of the first electrode.

2. The display panel according to claim 1, characterized in that: The sublayer is an inorganic material.

3. The display panel according to claim 1, characterized in that: The plurality of sub-layers include a first sub-layer and a second sub-layer stacked in sequence in a direction away from the substrate; Preferably, the ratio of the thickness of the first sublayer and the thickness of the second sublayer to the thickness of the first electrode is in the range of 0.8 to 6.25; Preferably, the thickness of the first sublayer is greater than or equal to 1000 microns and less than or equal to 5000 microns; Preferably, the thickness of the second sub-layer is greater than or equal to 500 micrometers and less than or equal to 3000 micrometers.

4. The display panel according to claim 3, characterized in that: The thickness of the first sublayer is greater than the thickness of the first electrode; Preferably, the thickness of the first sublayer is greater than or equal to 2000 micrometers and less than or equal to 5000 micrometers.

5. The display panel according to claim 4, characterized in that: The first sublayer contacts the first electrode.

6. The display panel according to claim 3, characterized in that: The thickness of the second sublayer is greater than the thickness of the first electrode; Preferably, the thickness of the second sub-layer is greater than or equal to 1000 micrometers and less than or equal to 2500 micrometers.

7. The display panel according to claim 3, characterized in that: The film-forming property of the first sub-layer is better than that of the second sub-layer; and / or The second sub-layer has better etching resistance than the first sub-layer.

8. The display panel according to claim 3, characterized in that: The first sub-layer and the second sub-layer are made of different materials; Preferably, the material of the first sublayer includes silicon nitride; Preferably, the material of the second sub-layer includes silicon oxide.

9. The display panel according to claim 1, characterized in that: The first electrode comprises a first sub-electrode and a second sub-electrode stacked together, the first sub-electrode is located on a side of the second sub-electrode close to the substrate, and an orthographic projection of the first sub-electrode on the substrate is within a range of an orthographic projection of the second sub-electrode on the substrate; Preferably, the first electrode further comprises a third sub-electrode, and the third sub-electrode is located on a side of the second sub-electrode away from the substrate; Preferably, the first sub-electrode and the third sub-electrode are made of the same material; Preferably, the thickness of the first sub-electrode is greater than the thickness of the third sub-electrode; Preferably, the material of the first sub-electrode includes ITO; Preferably, the material of the second sub-electrode includes Ag.

10. The display panel according to claim 9, characterized in that: A distance between an edge of an orthographic projection of the first sub-electrode on the substrate and an edge of an orthographic projection of the second sub-electrode on the substrate is greater than or equal to 0.1 micrometers and less than or equal to 1 micrometer.

11. The display panel according to claim 1, characterized in that: The pixel definition layer comprises a groove, an opening of the groove is located at a side of the pixel definition layer away from the substrate, and an orthographic projection of the groove on the substrate is located between adjacent first electrodes.

12. The display panel according to claim 1, characterized in that: It also includes an isolation structure, which is located on the side of the pixel definition layer away from the substrate, and the isolation structure encloses a plurality of isolation openings, and the pixel openings are located within the isolation openings; the display panel also includes a second electrode and a light-emitting layer, the second electrode is located on the side of the first electrode away from the substrate, and the light-emitting layer is located between the first electrode and the second electrode; adjacent light-emitting layers and adjacent second electrodes are disconnected at the isolation structure.

13. The display panel according to claim 12, characterized in that: The isolation structure comprises a first portion and a second portion, the first portion is located on a side of the second portion close to the substrate, and the second portion extends outward along a sidewall edge of the first portion; Preferably, the isolation structure further includes a third portion, the third portion is located on a side of the first portion close to the substrate, and the third portion extends outward along an edge of a side wall of the first portion.

14. The display panel according to claim 13, characterized in that: The pixel definition layer comprises a groove, the opening of the groove is located at a side of the pixel definition layer away from the substrate, and the orthographic projection of the groove on the substrate is located between adjacent first electrodes; The orthographic projection of the first portion on the substrate is within the orthographic projection range of the groove on the substrate; or The orthographic projection of the first portion on the substrate covers the orthographic projection of the groove on the substrate.

15. The display panel according to any one of claims 12 to 14, characterized in that: It also includes an inorganic packaging part, which is located on the side of the second electrode away from the substrate; the adjacent inorganic packaging parts are disconnected on the side of the isolation structure away from the substrate; Preferably, the display panel further comprises an organic encapsulation layer, which is located on a side of the inorganic encapsulation portion away from the substrate, and the orthographic projection of the organic encapsulation layer on the substrate covers the orthographic projections of the inorganic encapsulation portion and the isolation structure on the substrate; Preferably, the display panel further comprises an inorganic encapsulation layer located on a side of the organic encapsulation layer away from the substrate, and an orthographic projection of the inorganic encapsulation layer on the substrate covers an orthographic projection of the organic encapsulation layer on the substrate.

16. A display device, characterized in that: A display panel comprising any one of claims 1-15.

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