Display panel and display device

Abstract

This application provides a display panel and a display device. The display panel includes a substrate, a first electrode layer, and a pixel definition layer. The first electrode layer is disposed on one side of the substrate and includes a plurality of spaced-apart first electrodes. The pixel definition layer is disposed on the side of the first electrode layer facing away from the substrate and includes a plurality of pixel openings and an isolation portion located between two adjacent pixel openings. The first electrodes are exposed through the pixel openings. The isolation portion includes at least two spaced-apart protrusions, each protrusion having two surfaces facing two adjacent pixel openings respectively, and at least one of the two surfaces of the protrusion intersects. The spaced-apart protrusions can increase the length of the light-emitting material layer disposed in the pixel definition layer.

Description

Technical Field

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

[0002] As display panels have increasingly higher resolutions and more sub-pixels, the pixel definition layer size between adjacent sub-pixels is getting smaller. When a sub-pixel emits light, the small amount of current it generates may enter other adjacent sub-pixels along the common layer, causing crosstalk between sub-pixels and thus affecting the image display effect of the display panel.

[0003] Therefore, in order to reduce color crosstalk during the pixel lighting process, this application provides a display panel and a display device. Summary of the Invention

[0004] An embodiment of the first aspect of this application provides a display panel, including:

[0005] substrate;

[0006] A first electrode layer is disposed on one side of the substrate, and the first electrode layer includes a plurality of first electrodes disposed at intervals.

[0007] A pixel definition layer is disposed on the side of the first electrode layer away from the substrate. The pixel definition layer includes a plurality of pixel openings and an isolation portion located between two adjacent pixel openings. The first electrode is exposed through the pixel openings. The isolation portion includes at least two protrusions spaced apart. The protrusions have two surfaces facing two adjacent pixel openings respectively, and the two surfaces of at least one protrusion intersect.

[0008] According to any of the foregoing embodiments of the first aspect of this application, the isolation portion includes two protrusions, and an isolation groove is formed between the two protrusions in an isolation portion, and the surfaces of the two protrusions facing away from each other constitute the sidewall surface of the pixel opening.

[0009] According to any of the foregoing embodiments of the first aspect of this application, the angle between the sidewall surface and the plane where the first electrode is located is 80° to 82.5°.

[0010] According to any of the foregoing embodiments of the first aspect of this application, both surfaces of the protrusion are configured as slopes.

[0011] According to any of the foregoing embodiments of the first aspect of this application, the included angle formed by the intersection of the two protruding surfaces is an acute angle.

[0012] According to any of the foregoing embodiments of the first aspect of this application, the included angle is 15° to 20°.

[0013] According to any of the foregoing embodiments of the first aspect of this application, the opening size of the pixel aperture gradually increases along the substrate toward the pixel definition layer, the depth of the pixel aperture along the substrate toward the first electrode layer is L1, and the minimum opening size of the isolation trench is L2, where L1 > L2.

[0014] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes a light-emitting material layer, the light-emitting material layer including a light-emitting layer and a common layer, the light-emitting layer being disposed within a pixel opening, the common layer including a first common portion and a second common portion, the first common portion covering at least a portion of its raised surface, the second common portion being disposed between two adjacent first common portions and located at the bottom of an isolation trench, the common layer being doped with a first dopant, the concentration of the first dopant in the first common portion being less than the concentration of the first dopant in the second common portion.

[0015] According to any of the foregoing embodiments of the first aspect of this application, the first common portion includes a plurality of first sub-parts and a plurality of second sub-parts, and the two protruding surfaces include a first surface and a second surface that open toward two adjacent pixels respectively. The first sub-parts cover the first surface, the second sub-parts cover the second surface, and the thickness of the second common portion is greater than the thickness of the first common portion.

[0016] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the first common portion gradually changes.

[0017] According to any of the foregoing embodiments of the first aspect of this application, the common layer is a carrier functional layer.

[0018] According to any of the foregoing embodiments of the first aspect of this application, the common layer is a hole injection layer.

[0019] According to any of the foregoing embodiments of the first aspect of this application, the first dopant is a P-type doped material.

[0020] A second aspect of this application also provides a display device, including the display panel provided in any embodiment of the first aspect of this application.

[0021] This application provides a display panel and a display device. The display panel includes a substrate, a first electrode layer, and a pixel definition layer. The first electrode layer is disposed on one side of the substrate and includes a plurality of spaced-apart first electrodes. The pixel definition layer is disposed on the side of the first electrode layer away from the substrate and includes a plurality of pixel openings and an isolation portion located between two adjacent pixel openings. The first electrodes are exposed through the pixel openings. The isolation portion includes at least two spaced-apart protrusions, each protrusion having two surfaces facing two adjacent pixel openings, and at least one of the two surfaces of the protrusion intersects. The display panel provided in this application improves the structure of the pixel definition layer. The isolation portion located between two adjacent pixel openings includes at least two spaced-apart protrusions, which can increase the length of the light-emitting material layer disposed in the pixel definition layer. The intersection of the two surfaces of a protrusion facing two adjacent pixel openings gives the protrusion a sharp point, which can easily cause the common layer disposed at the sharp point to break, thereby reducing the lateral current transmission. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0028] Figure 6 This is a partially enlarged schematic diagram of a display panel provided in an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the structure of a display device provided in an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Display panel;

[0032] 1. Substrate; 2. First electrode layer; 21. First electrode;

[0033] 3. Pixel definition layer; 31. Pixel opening; 311. Side wall; 32. Isolation part; 321. Protrusion; 3211. First surface; 3212. Second surface; 322. Isolation groove;

[0034] 4. Luminescent material layer; 41. Luminescent layer; 42. Common layer; 421. First common section; 421a. First subsection; 421b. Second subsection; 422. Second common section; 423. Second carrier functional layer; 423a. Electron injection layer; 423b. Electron transport layer; 424. First carrier functional layer; 424a. Hole injection layer; 424b. Hole transport layer;

[0035] 5. Drive circuit layer; 6. Second electrode layer; L1, Depth; L2, Minimum opening size; α1, First included angle; α2, Second included angle;

[0036] 200. Display device. Detailed Implementation

[0037] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0038] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] An organic light-emitting diode (OLED) is an electroluminescent device based on organic materials. Its basic structure includes an anode, a cathode, and an emissive layer. When a voltage is applied to the anode and cathode, holes and electrons are injected from the anode and cathode and transported to the emissive layer under the influence of an electric field. The holes and electrons combine in the emissive layer to generate excitons, thereby exciting the emissive layer to produce visible light. A display panel includes multiple light-emitting devices that can emit different colors of light. To reduce color crosstalk between different colored light-emitting devices, this application provides a display panel and a display device.

[0041] Please refer to the following: Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application. Figure 2 This is a schematic diagram of another display panel structure provided in an embodiment of this application. An embodiment of this application provides a display panel 100, including a substrate 1, a first electrode layer 2, and a pixel definition layer 3. The first electrode layer 2 is disposed on one side of the substrate 1 and includes a plurality of spaced-apart first electrodes 21. The pixel definition layer 3 is disposed on the side of the first electrode layer 2 facing away from the substrate 1 and includes a plurality of pixel openings 31 and an isolation portion 32 located between two adjacent pixel openings 31. The first electrodes 21 are exposed through the pixel openings 31. The isolation portion 32 includes at least two spaced-apart protrusions 321, each protrusion 321 having two surfaces facing two adjacent pixel openings 31 respectively, and at least one of the two surfaces of the protrusion 321 intersects.

[0042] The display panel 100 can suppress external light reflection through the isolation portion 32. The isolation portion 32 includes two protrusions 321 spaced apart. The light-emitting material disposed on the pixel definition layer 3 can be disposed between and on the two protrusions 321. The length of the light-emitting material formed in this application is longer than that of the isolation portion 32 without the two protrusions 321 spaced apart. The protrusions 321 have two surfaces facing the openings 31 of two adjacent pixels respectively. At least one of the two surfaces of the protrusion 321 intersects, which allows the layer structure disposed on the surface of the isolation portion 32 to adhere better to the isolation portion 32. The intersection of the two surfaces of the protrusion 321 gives the protrusion 321 a tip, on which a common layer is formed. The common layer is prone to breakage at the tip, thereby reducing the lateral current transmission. It should be noted that the above-mentioned "tip" is not a strictly geometric edge. The tip of the protrusion 321 obtained in actual production is often a connecting surface with a very small width, which can also be understood as the transition surface between the two surfaces of the protrusion 321.

[0043] Optionally, the isolation portion 32 may also include a connecting portion for connecting the plurality of protrusions 321. The isolation portion 32 may be made of, for example, polyacrylate resin or polyimide resin. The protrusions 321 may be in the shape of prisms, cones, triangular prisms, etc.

[0044] Optionally, the projection of the isolation portion 32 onto the substrate 1 may overlap with the projection of the first electrode 21 onto the substrate 1.

[0045] The substrate 1 can be a glass substrate 1, or a polyimide (PI) material or a material containing PI, so that the substrate 1 is flexible and can be bent.

[0046] It is understood that the display panel 100 provided in this application also includes a driving circuit layer 5. The driving circuit layer 5 is disposed on the side of the substrate 1 near the first electrode layer 2. A plurality of thin-film transistors are formed in the driving circuit layer 5. The thin-film transistors are interconnected to form a plurality of pixel driving circuits. The plurality of first electrodes 21 are independent of each other. Each pixel driving circuit is connected to the corresponding first electrode 21 to provide a driving voltage to the first electrode 21. The pixel definition layer 3 and each first electrode 21 are formed on the driving circuit layer 5.

[0047] In some alternative embodiments, the isolation portion 32 includes two protrusions 321, and an isolation groove 322 is formed between the two protrusions 321 in an isolation portion 32. The surfaces of the two protrusions 321 facing away from each other constitute the sidewall surface 311 of the pixel opening 31.

[0048] In these alternative embodiments, an isolation groove 322 can be formed by etching to separate two protrusions 321, which are located between two adjacent pixel openings 31, and the surfaces of the two protrusions 321 facing away from each other form the sidewall surface 311 of the pixel opening 31.

[0049] In some optional embodiments, the angle between the sidewall surface 311 and the plane containing the first electrode 21 is 80° to 82.5°.

[0050] In these optional embodiments, the maximum included angle between the sidewall surface 311 and the plane containing the first electrode 21 is a first included angle α1, the value of which ranges from 80° to 82.5°. The inclination of the protrusion 321 increases as the included angle between the sidewall surface 311 and the plane containing the first electrode 21 increases. Thus, when a conductive dopant is deposited on the protrusion 321, the dopant can flow down along the sidewall surface 311 under the action of gravity, thereby helping to reduce the concentration of the dopant on the sidewall surface 311.

[0051] In some alternative embodiments, both surfaces of the protrusion 321 are configured as bevels.

[0052] In these alternative embodiments, both surfaces of the protrusion 321 are beveled to allow the conductive dopant to adhere better to the surface of the protrusion 321.

[0053] In some alternative embodiments, the included angle formed by the intersection of the two surfaces of the protrusion 321 is an acute angle.

[0054] In these alternative embodiments, the acute angle formed by the intersection of the two surfaces of the protrusion 321 can increase the opening size of the pixel opening 31 and reduce the material used in the isolation portion 32.

[0055] In some alternative embodiments, the included angle is 15° to 20°.

[0056] In these alternative embodiments, the second included angle α2 is in the range of 15° to 20°. Because the angle of 15° to 20° is small, when the conductive dopant is deposited on the protrusion 321, it is beneficial for the conductive dopant to break at the included angle, thereby reducing the lateral transmission of current.

[0057] Please refer to the following: Figure 3 , Figure 3 This is a schematic diagram of another display panel structure provided in an embodiment of this application. Optionally, two protrusions 321 are spaced apart, and the first electrode layer 2 is exposed between the two protrusions 321.

[0058] Please refer to the following: Figure 4 , Figure 4This is a schematic diagram of another display panel structure provided in an embodiment of this application. In some optional embodiments, the opening size of the pixel opening 31 gradually increases along the substrate 1 towards the pixel definition layer 3, the depth of the pixel opening 31 along the substrate 1 towards the first electrode layer 2 is L1, and the minimum opening size of the isolation groove 322 is L2, where L1 > L2.

[0059] In these optional embodiments, the opening size of the pixel aperture 31 gradually increases along the substrate 1 towards the pixel defining layer 3. L1 > L2 facilitates the formation of a reflective cup structure in the pixel defining layer 3, thereby improving luminous efficiency and reducing sub-pixel dispersion. A common layer 42 is formed on the pixel defining layer 3. The common layer 42 includes multiple first common portions 421 covering the protrusions 321 and multiple second common portions 422 falling into the isolation grooves 322. The length of one first common portion 421 is the length of one first surface 3211 and one second surface 3212, and the length of one first common portion 421 is greater than L1. The length of the second common portion 422 is L2. The length of one first common portion 421 is greater than the length of one second common portion 422. Therefore, the resistance of one first common portion 421 is greater than the resistance of one second common portion 422. L1 > L2 helps reduce the current of the first common portion 421, which in turn helps reduce crosstalk between different color sub-pixels, thus improving color shift.

[0060] Please refer to the following: Figures 5 to 6 , Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of this application. Figure 6 This is a partially enlarged schematic diagram of a display panel provided in an embodiment of this application. In some optional embodiments, the display panel 100 further includes a light-emitting material layer 4, which includes a light-emitting layer 41 and a common layer 42. The light-emitting layer 41 is disposed within a pixel opening 31. The common layer 42 includes a plurality of first common portions 421 and a plurality of second common portions 422. The first common portions 421 cover at least a portion of the surface of a protrusion 321. The second common portions 422 are disposed between two adjacent first common portions 421 and located at the bottom of an isolation groove 322. The common layer 42 is doped with a first dopant, and the concentration of the first dopant in the first common portions 421 is less than the concentration of the first dopant in the second common portions 422.

[0061] In these optional embodiments, the first common portion 421 may undulate along the two surfaces of the protrusion 321 toward the two adjacent pixel openings 31. The two protrusions 321 of the isolation portion 32 are spaced apart to form an isolation groove 322. The second common portion 422 falls into the isolation groove 322. The extension direction of the second common portion 422 may be parallel to the extension direction of the first electrode 21, such that at least part of the plane where the first common portion 421 is located is angled to the plane where the second common portion 422 is located. The concentration of the first dopant in the first common portion 421 is less than the concentration of the first dopant in the second common portion 422, making the conductivity of the first common portion 421 weaker than that of the second common portion 422, thereby reducing the lateral current conduction between the multiple spaced isolation portions 32.

[0062] Optionally, the first dopant can be a P-type doped material or an N-type doped material. Those skilled in the art will understand that the higher the dopant concentration, the stronger the conductivity of the common layer 42, and the higher the concentration of charge carriers that can be generated; conversely, the lower the dopant concentration, the weaker the conductivity of the common layer 42, and the lower the concentration of charge carriers that can be generated. When the concentrations of the first dopant in the first common portion 421 and the second common portion 422 are the same, the current in the first common portion 421 can be conducted to the other second common portion 422, causing the light-emitting layer 41 corresponding to the other second common portion 422 to emit light. Therefore, in this embodiment, by setting the concentration of the first dopant in the first common portion 421 to be less than the concentration of the first dopant in the second common portion 422, the conductivity of the first common portion 421 is weaker than that of the second common portion 422. This reduces the current in the first common portion 421 that can be conducted to the other second common portion 422, allowing the light-emitting layer 41 corresponding to the other second common portion 422 to emit light. This reduces the current between the light-emitting layers 41 in different pixel openings 31 that can be laterally transmitted through the common layer 42, thereby reducing crosstalk between adjacent pixels.

[0063] When fabricating the display panel 100, a driving circuit layer 5, a first electrode layer 2, a pixel definition layer 3, and a light-emitting material layer 4 can be sequentially formed on the substrate 1. The driving circuit layer 5, the first electrode layer 2, and the pixel definition layer 3 can be formed and etched using physical vapor deposition (PVD) or chemical vapor deposition (CVD), and the light-emitting material layer 4 can be obtained by vapor deposition. When vapor-depositing the light-emitting material layer 4, a common part 421 and a common part 422 can be prepared using a common metal mask (CMM), and the light-emitting layer 41 can be prepared using a fine metal mask (FMM).

[0064] Optionally, the display panel 100 further includes a second electrode layer 6, wherein one of the first electrode layer 2 and the second electrode layer 6 is an anode and the other is a cathode. Optionally, the first electrode layer 2 is an anode and the second electrode layer 6 is a cathode.

[0065] The first electrode layer 2, the light-emitting material layer 4, and the second electrode layer 6 form one or more sub-pixels. When the first electrode layer 2 and the second electrode layer 6 are energized, holes and electrons in the light-emitting material layer 4 combine in the light-emitting layer 41 to generate excitons. The excitons generate different colors such as red, green, and blue depending on the different materials of the light-emitting material layer 4, so as to realize the color display of the display panel 100.

[0066] In some optional embodiments, the first common portion 421 includes a plurality of first sub-portions 421a and a plurality of second sub-portions 421b. The two surfaces of the protrusion 321 include a first surface 3211 and a second surface 3212 facing two adjacent pixel openings 31, respectively. The first sub-portions 421a cover the first surface 3211, the second sub-portions 421b cover the second surface 3212, and the thickness of the second common portion 422 is greater than the thickness of the first common portion 421.

[0067] In some alternative embodiments, the thickness of the first common portion 421 is gradually varied.

[0068] In these optional embodiments, the thickness of the first common portion 421 refers to the thickness of the first common portion 421 deposited on one side of the substrate 1 in the direction perpendicular to the plane of the substrate 1. The thickness of the second common portion 422 refers to the thickness of the second common portion 422 deposited on one side of the substrate 1 in the direction perpendicular to the plane of the substrate 1. The first common portion 421 includes a plurality of first sub-portions 421a and a plurality of second sub-portions 421b. The first sub-portions 421a cover the first surface 3211, and the second sub-portions 421b cover the second surface 3212. The first sub-portions 421a and the second sub-portions 421b form an angle with the plane of the substrate 1. Under the action of gravity, the thickness of the first sub-portions 421a and the second sub-portions 421b gradually decreases along the direction from the pixel definition layer 3 to the substrate 1. The second common portion 422 is disposed between two adjacent first common portions 421 and located at the bottom of the isolation groove 322. The bottom of the isolation groove 322 is parallel to the plane of the substrate 1, so that the thickness of the second common portion 422 is greater than the thickness of the first common portion 421.

[0069] Optionally, the projection of the first sub-part 421a covering the same protrusion 321 onto the pixel definition layer 3 and the projection of the second sub-part 421b covering the same protrusion 321 onto the pixel definition layer 3 are spaced apart. The first sub-part 421a and the second sub-part 421b covering the same protrusion 321 are disconnected at the intersection of the first surface 3211 and the second surface 3212, cutting off the connection between the first sub-part 421a and the second sub-part 421b in adjacent sub-pixels. This can prevent lateral current conduction between the first sub-part 421a and the second sub-part 421b, alleviate the phenomenon of leakage light emission between adjacent sub-pixels, and reduce crosstalk between adjacent sub-pixels.

[0070] Optionally, a laser can be used to disconnect the connection between the first sub-parts 421a and the second sub-parts 421b of the same first common part 421.

[0071] In some alternative embodiments, the common layer 42 is a carrier layer.

[0072] In these optional embodiments, the carrier layer may include a first carrier functional layer 424 and a second carrier functional layer 423, with the first carrier functional layer 424 and the second carrier functional layer 423 disposed opposite to each other. The light-emitting layer 41 is located between the first carrier functional layer 424 and the second carrier functional layer 423, and the second electrode layer 6 is disposed on the side of the second carrier functional layer 423 facing away from the first carrier functional layer 424. If the first electrode layer 2 can be an anode, then the second electrode layer 6 can be a cathode. The first carrier is a hole injected by the anode, and the second carrier is an electron injected by the cathode. The second carrier functional layer 423 may include an electron injection layer (EIL) 423a and an electron transport layer (ETL) 423b, and the first carrier functional layer 424 may include a hole injection layer (HIL) 424a and a hole transport layer (HTL) 424b.

[0073] The first charge carrier is injected into the light-emitting layer 41 from the first electrode layer 2 via the hole injection layer 424a and the hole transport layer 424b. The second charge carrier is injected into the light-emitting layer 41 from the second electrode layer 6 via the electron injection layer 423a and the electron transport layer 423b. The first and second charge carriers combine in the light-emitting layer 41 to form excitons and emit light.

[0074] In some alternative embodiments, the common layer 42 is a hole injection layer 424a.

[0075] In these optional embodiments, due to the different transport rates of the first and second charge carriers, there is an imbalance in the number of the first and second charge carriers in the light-emitting layer 41, resulting in a low exciton concentration in the light-emitting layer 41. When the first charge carrier is a hole and the second charge carrier is an electron, the electron mobility is greater than the hole mobility. In order to reduce crosstalk between adjacent sub-pixels, setting the common layer 42 as a hole injection layer 424a can reduce the number of holes migrating at the connection between the first sub-part 421a and the second sub-part 421b, thereby reducing the exciton concentration between adjacent sub-pixels and thus reducing the power consumption of the display panel 100.

[0076] In some alternative embodiments, the first dopant is a p-type doped material.

[0077] In these optional embodiments, the common layer 42 is a hole injection layer 424a, and the first dopant in the hole injection layer 424a is a P-type dopant. The P-type dopant undergoes an electron transfer reaction under light excitation. In this embodiment, the light used to excite the P-type dopant is not limited; it can be sunlight or other external light sources, such as infrared light, ultraviolet light, or visible light. After the P-type dopant undergoes an electron transfer reaction under light excitation, it injects the first carriers into the hole transport layer 424b, effectively increasing the efficiency of the OLED device and reducing power consumption.

[0078] P-type doped materials can include elements from Group IIIA of the periodic table, including boron (B), aluminum (Al), gallium (Ga), indium (In), and thallium (Tl).

[0079] The first carrier functional layer 424 is doped with a second dopant, which is an N-type dopant material. The N-type dopant material may include elements of group VA of the periodic table, including nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi).

[0080] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. A second aspect of this application also provides a display device 200, which includes the display panel provided in the first aspect of this application. The display device 200 can specifically be a smartwatch, tablet computer, laptop computer, personal computer (PC), microprocessor box, or other device with display functionality. The second aspect of this application has the beneficial effects of the first aspect of this application, which will not be elaborated further here.

[0081] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0082] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0083] It should be understood that in the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0084] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display panel, characterized in that, include: substrate; A first electrode layer is disposed on one side of the substrate, and the first electrode layer includes a plurality of first electrodes disposed at intervals. A pixel definition layer is disposed on the side of the first electrode layer facing away from the substrate. The pixel definition layer includes a plurality of pixel openings and an isolation portion located between two adjacent pixel openings. The first electrode is exposed through the pixel openings. The isolation portion includes a connecting portion and two protrusions. The connecting portion is used to connect the two protrusions. In one isolation portion, an isolation groove is formed between the two protrusions. The protrusions have two surfaces that open toward two adjacent pixels respectively. At least one of the two surfaces of the protrusions intersects. The display panel further includes a light-emitting material layer, which includes a common layer. The common layer includes a first common portion and a second common portion. The first common portion covers at least a portion of the surface of one of the protrusions. The second common portion is disposed between two adjacent first common portions and located at the bottom of the isolation groove. The conductivity of the first common portion is weaker than that of the second common portion.

2. The display panel according to claim 1, characterized in that, The surfaces of the two protrusions facing away from each other form the sidewall of the pixel opening.

3. The display panel according to claim 2, characterized in that, The angle between the sidewall and the plane containing the first electrode is 80° to 82.5°.

4. The display panel according to claim 1, characterized in that, Both surfaces of the protrusion are set as slopes.

5. The display panel according to claim 4, characterized in that, The included angle formed by the intersection of the two protruding surfaces is an acute angle.

6. The display panel according to claim 5, characterized in that, The included angle is 15°~20°.

7. The display panel according to claim 2, characterized in that, The opening size of the pixel opening gradually increases along the substrate towards the pixel definition layer, the depth of the pixel opening along the substrate towards the first electrode layer is L1, and the minimum opening size of the isolation trench is L2, where L1 > L2.

8. The display panel according to any one of claims 2-7, characterized in that, The light-emitting material layer includes a light-emitting layer disposed within the pixel opening. The common layer is doped with a first dopant, and the concentration of the first dopant in the first common portion is less than the concentration of the first dopant in the second common portion.

9. The display panel according to claim 8, characterized in that, The first common portion includes a plurality of first sub-portions and a plurality of second sub-portions. The two surfaces of the protrusion include a first surface and a second surface that open toward two adjacent pixels, respectively. The first sub-portions cover the first surface, and the second sub-portions cover the second surface. The thickness of the second common portion is greater than the thickness of the first common portion.

10. The display panel according to claim 9, characterized in that, The thickness of the first common part gradually changes.

11. The display panel according to claim 8, characterized in that, The common layer is the carrier functional layer.

12. The display panel according to claim 11, characterized in that, The common layer is a hole injection layer, and the first dopant is a P-type doped material.

13. A display device, characterized in that, Includes the display panel as described in any one of claims 1-12.

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