Display panel and display device

Abstract

The present application relates to a display panel and a display device, wherein the display panel includes an array substrate, a flat layer, a black pixel definition layer and a light-emitting device layer; the flat layer is arranged on the array substrate; the black pixel definition layer is arranged on the flat layer, includes a plurality of criss-cross light-shielding walls, and defines a plurality of light-emitting areas; the light-emitting device layer includes a plurality of light-emitting devices, each light-emitting device is located in a light-emitting area, and the light-emitting device includes an anode arranged on the flat layer, an organic light-emitting layer arranged on the anode, and a cathode; wherein the display panel also includes an isolation layer arranged on the flat layer, the isolation layer is provided with a receiving groove for accommodating the light-shielding wall, the isolation layer is provided with an opening at a position between two adjacent receiving grooves, and the organic light-emitting layer is exposed from the opening; the cathode is arranged on the isolation layer, the cathode portion extends into the opening, and is arranged on the organic light-emitting layer.

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] With the promotion of large-size display screens and foldable screens, PLP (Pol Less Panel, Chinese abbreviation: removing the polarizer from the display panel) technology is now introduced. BM (Black Matrix) is used to block the non-pixel area to prevent light leakage from the panel and reduce the light reflectivity of the panel. At the same time, CF (Color Filter) is used in the pixel area, and the R / G / B color resistance of CF corresponds to the light-emitting device in the pixel area, thereby replacing the polarizer.

[0003] Usually, in order to maintain the brightness of light, the BM opening is set relatively large. At the same time, in order to reduce the reflection of ambient light, a Black PDL (black pixel definition layer) is used on the light-emitting device layer. After curing, the black pixel definition layer has burrs on its edges, which will pierce the cathode of the light-emitting pixel and short-circuit it with the anode, thereby generating dark spots. Summary of the Invention

[0004] Embodiments of the present application provide a display panel and a display device that solve the problem of dark spots caused by burrs on the edges of a black pixel definition layer penetrating the cathode of a light-emitting pixel and causing a short circuit between the cathode and the anode.

[0005] In order to achieve the above-mentioned objective, according to a first aspect of the present application, a display panel is provided, comprising:

[0006] array substrate;

[0007] a planar layer, disposed on the array substrate;

[0008] a black pixel definition layer disposed on the planar layer, the black pixel definition layer comprising a plurality of light-shielding walls arranged in a crisscross pattern and defining a plurality of light-emitting areas; and

[0009] a light-emitting device layer comprising a plurality of light-emitting devices, each of the light-emitting devices being located in one of the light-emitting regions, the light-emitting devices comprising an anode disposed on the planar layer, an organic light-emitting layer disposed on the anode, and a cathode;

[0010] The display panel further includes an isolation layer disposed on the flat layer, the isolation layer being provided with a receiving groove for accommodating the light-shielding wall, the isolation layer being provided with an opening at a position between two adjacent receiving grooves, and the organic light-emitting layer being exposed from the opening;

[0011] The cathode is arranged on the isolation layer, and the cathode portion extends into the opening and is arranged on the organic light emitting layer.

[0012] In one embodiment, the isolation layer is configured as a single film layer structure, the accommodating groove is provided on the side of the isolation layer facing away from the flat layer, and the isolation layer is provided with the opening at a position between two adjacent accommodating grooves;

[0013] The light-shielding wall is located on a side of the isolation layer away from the flat layer and is accommodated in the receiving groove.

[0014] In one embodiment, the isolation layer includes a first sublayer and a second sublayer, the first sublayer is disposed on the flat layer, the second sublayer is disposed on the first sublayer, the receiving groove is disposed between the first sublayer and the second sublayer, and the opening passes through the first sublayer and the second sublayer;

[0015] Wherein, the light-shielding wall is located between the first sub-layer and the second sub-layer, and is accommodated in the accommodation groove;

[0016] The cathode is disposed on the second sub-layer.

[0017] In one embodiment, a first through hole is provided on the second sub-layer at a position between two adjacent receiving grooves, and the first through hole extends through the first sub-layer in the thickness direction of the display panel to form the opening;

[0018] The cathode is disposed on the second sub-layer, and a portion of the cathode extends into the first through hole and is disposed on the organic light-emitting layer.

[0019] In one embodiment, a second through hole is provided on the first sub-layer at a position between two adjacent accommodating grooves, the second sub-layer partially extends into the second through hole to form a filling portion, a third through hole is provided on the filling portion, and the organic light-emitting layer is exposed from the third through hole to form the opening;

[0020] The cathode is disposed on the second sub-layer, and a portion of the cathode extends into the third through hole and is disposed on the organic light-emitting layer.

[0021] In one embodiment, the refractive index of the first sub-layer is smaller than the refractive index of the second sub-layer.

[0022] In one embodiment, a first groove is provided on the first sub-layer to form the accommodating groove, and the first groove is located on the side of the first sub-layer facing the second sub-layer. The light-shielding wall is accommodated in the first groove and is flush with the notch of the first groove.

[0023] In one embodiment, a first groove is provided on the side of the first sub-layer facing the second sub-layer, and a second groove is provided on the side of the second sub-layer facing the first sub-layer. The second groove is opposite to the notch of the first groove to jointly form the accommodating groove, and the light-shielding wall is accommodated in the first groove and the second groove.

[0024] In one embodiment, in the thickness direction of the display panel, in the thickness direction of the display panel, wherein:

[0025] The thickness of the second sub-layer is greater than or equal to the thickness of the first sub-layer; and / or,

[0026] The thickness of the first sublayer is set to T1, the thickness of the second sublayer is set to T2, and the depth of the first groove is set to T3, wherein (T1-T3) is less than 1 / 5 (T1+T2).

[0027] According to a second aspect of the present application, a display device is provided, comprising the above-mentioned display panel.

[0028] In the display panel of the embodiment of the present application, a flat layer is arranged on the array substrate, a black pixel definition layer is arranged on the flat layer, and the light-emitting area is defined by the light-shielding walls of the black pixel definition layer; a light-emitting device is arranged in the light-emitting area; the light-emitting device includes an anode arranged on the array substrate, an organic light-emitting layer arranged on the anode, and a cathode; at the same time, an isolation layer is arranged on the array substrate, and a receiving groove for accommodating the light-shielding walls is provided on the isolation layer, and an opening is provided at a position between two adjacent receiving grooves to expose the organic light-emitting layer; a cathode is arranged on the isolation layer, and the cathode part extends into the opening and is arranged on the organic light-emitting layer; by arranging the light-shielding walls in the receiving grooves of the isolation layer, the bottom and sides of the light-shielding walls can be covered, thereby blocking the burrs on the edges of the light-shielding walls, avoiding the problem of the burrs penetrating the cathode and causing it to short-circuit with the anode, thereby solving the problem of dark spots.

[0029] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0031] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0032] Figure 1a A schematic plan view of a light-emitting device layer in the prior art;

[0033] Figure 1b This is a film layer diagram of a light-emitting device layer in the prior art;

[0034] Figure 2 A first film layer diagram of a light-emitting device layer provided in an embodiment of the present application;

[0035] Figure 3 A second film layer diagram of the light-emitting device layer provided in an embodiment of the present application;

[0036] Figure 4 A third film layer diagram of the light-emitting device layer provided in an embodiment of the present application;

[0037] Figure 5a Flowchart of the display panel (making the first sub-layer) provided in an embodiment of the present application;

[0038] Figure 5b Flowchart of a display panel (etching a first groove) provided in an embodiment of the present application;

[0039] Figure 5c Flowchart of a display panel (making a black pixel definition layer) provided in an embodiment of the present application;

[0040] Figure 5d Flowchart of the display panel (making light-shielding walls) provided in the embodiment of the present application;

[0041] Figure 5e Flowchart of the display panel (manufacturing the second sub-layer) provided in an embodiment of the present application;

[0042] Figure 5f Flowchart of a display panel (etching a first through hole) provided in an embodiment of the present application;

[0043] Figure 5g This is a flow chart of a display panel (for manufacturing a light-emitting device) provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] 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 embodiments described 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 those skilled in the art without creative work are within the scope of protection of the present application.

[0045] The present invention provides a display panel 100 and a display device. Detailed descriptions are provided below. It should be noted that the order in which the following embodiments are described does not limit the preferred order of the embodiments.

[0046] This application does not limit the specific form of the display device, which may be an OLED display device. The display device provided in the embodiments of the present disclosure can be applied to electronic devices such as mobile phones, tablet computers, televisions, monitors, laptop computers, digital photo frames, navigation systems, and vehicle displays. It can also be any product or component with a display function, such as a wearable device, such as a smart watch, smart bracelet, smart glasses, smart headphones, smart clothing, head-mounted displays, etc.

[0047] In a first aspect, the present invention provides a display panel 100. Figures 2 to 4 The display panel 100 includes an array substrate 1, a flat layer 5, a black pixel definition layer 2 and a light-emitting device layer 3; the black pixel definition layer 2 is arranged on the flat layer 5, and the black pixel definition layer 2 includes a plurality of light-shielding walls 21 that are crisscrossed and define a plurality of light-emitting areas 22; the light-emitting device layer 3 includes a plurality of light-emitting devices 31, each of the light-emitting devices 31 is located in one of the light-emitting areas 22, and the light-emitting device 31 includes an anode 311 arranged on the flat layer 5, an organic light-emitting layer 312 arranged on the anode 311, and a cathode 313.

[0048] To know, please refer to Figure 1a and Figure 1b In the display panel 100', a flat layer 5' is typically provided on the array substrate 1' as an encapsulation layer. A color filter layer is then provided on top of the flat layer 5', thereby forming a COE (CF on Encapsulation) structure. This replaces the polarizer, which helps reduce power consumption, enhance the color gamut, reduce thickness, and improve bending performance of the display panel 100'. To maintain light brightness, the BM opening is typically set relatively large. To reduce ambient light reflection, a BlackPDL (black pixel definition layer 2') is used on the light-emitting device layer 3'.

[0049] See also Figure 1aand Figure 1b Since the material of the black pixel definition layer 2' is an ink material doped with opaque particles, the ink material will aggregate and settle during the production process of the black pixel definition layer 2', and the surface of the black pixel definition layer 2' will be excessively glued during the etching process, resulting in large burrs on the light-shielding wall 21' and uneven edges. In the subsequent process of the light-emitting device 31', the burrs will penetrate the cathode 313' and the organic light-emitting layer 312' of the light-emitting device 31', thereby causing a short circuit between the cathode 313' and the anode 311', and thus resulting in dark spot defects.

[0050] In this application, please refer to Figures 2 to 4 The display panel 100 also includes an isolation layer 4 arranged on the array substrate 1, and a receiving groove 4a for accommodating the light-shielding wall 21 is provided on the isolation layer 4. The isolation layer 4 is provided with an opening 4b at a position between two adjacent receiving grooves 4a, and the organic light-emitting layer 312 is exposed from the opening 4b; the cathode 313 is arranged on the isolation layer 4, and the cathode 313 partially extends into the opening 4b and is arranged on the organic light-emitting layer 312; that is, by arranging the light-shielding wall 21 in the receiving groove 4a of the isolation layer 4, at least the bottom and side of the light-shielding wall 21 can be covered, thereby blocking the burrs on the edge of the light-shielding wall 21, avoiding the problem of the burrs penetrating the cathode 313 and causing it to short-circuit with the anode 311, thereby solving the problem of dark spots.

[0051] The present application does not impose any specific restrictions on the material of the isolation layer 4. The isolation layer 4 can adopt the conventional pixel definition layer in the existing display panel 100. The material of the isolation layer 4 can be photoresist, organic polymer or inorganic material, etc., and can be designed according to the specific product.

[0052] The present application does not impose any specific limitation on the structure of the isolation layer 4 , and the isolation layer 4 may be a single-layer structure or a double-layer structure.

[0053] See also Figure 2 In the first embodiment of the present application, the isolation layer 4 is configured as a single film layer structure, the accommodating groove 4a is provided on the isolation layer 4 on the side away from the flat layer 5, and the isolation layer 4 is provided with the opening 4b at the position between two adjacent accommodating grooves 4a; wherein, the light-shielding wall 21 is located on the side of the isolation layer 4 away from the flat layer 5, and is accommodated in the accommodating groove 4a.

[0054] In the first embodiment, a single-layer isolation layer 4 is provided, and the receiving groove 4a is provided on the isolation layer 4. On the one hand, by providing the receiving groove 4a, the bottom and side of the light-shielding wall 21 can be covered, thereby blocking the burrs on the edge of the light-shielding wall 21, avoiding the problem of the burrs penetrating the cathode 313 and causing it to short-circuit with the anode 311, thereby solving the problem of dark spots; on the other hand, the single-layer isolation layer 4 can reduce the overall thickness of the display panel 100.

[0055] Moreover, in the first embodiment, the light-shielding wall 21 is accommodated in the receiving groove 4a, and on the side away from the flat layer 5, the light-shielding wall 21 can exceed the notch of the receiving groove 4a, the light-shielding wall 21 can be lower than the notch of the receiving groove 4a, and the light-shielding wall 21 can be flush with the notch of the receiving groove 4a; in order to further increase the covering range of the light-shielding wall 21 by the receiving groove 4a, while taking into account the flattening of the isolation layer 4, preferably, on the side away from the flat layer 5, the light-shielding wall 21 is flush with the notch of the receiving groove 4a.

[0056] In another embodiment, the isolation layer 4 includes a first sublayer 41 and a second sublayer 42, the first sublayer 41 is arranged on the flat layer 5, the second sublayer 42 is arranged on the first sublayer 41, the accommodating groove 4a is arranged between the first sublayer 41 and the second sublayer 42, and the opening 4b passes through the first sublayer 41 and the second sublayer 42; wherein the light-shielding wall 21 is located between the first sublayer 41 and the second sublayer 42, and is accommodated in the accommodating groove 4a; the cathode 313 is arranged on the second sublayer 42.

[0057] That is, the isolation layer 4 is configured as a stacked first sublayer 41 and a second sublayer 42, and the light-shielding barrier 21 is sandwiched between the first sublayer 41 and the second sublayer 42, thereby fully enveloping the light-shielding barrier 21 and thereby preventing burrs on the edges of the light-shielding barrier 21. Simultaneously, the opening 4b penetrates the first sublayer 41 and the second sublayer 42, such that the organic light-emitting layer 312 is exposed through the opening 4b. The cathode 313 is disposed on the second sublayer 42, partially extending into the opening 4b and disposed on the organic light-emitting layer 312, thereby ensuring the luminous performance of the light-emitting device 31.

[0058] The present application does not impose any restrictions on the formation method of the receiving groove 4a. The receiving groove 4a can be set only on the first sub-layer 41, and the receiving groove 4a can be set on two opposite surfaces of the first sub-layer 41 and the second sub-layer 42 at the same time, and can be designed according to the specific product.

[0059] The present application does not limit the formation method of the opening 4b. The opening 4b can be directly through the first sub-layer 41 and the second sub-layer 42, or through holes can be set in the first sub-layer 41 and the second sub-layer 42 in sequence to jointly form the opening 4b. The design can be based on the specific product.

[0060] Furthermore, the materials of the first sub-layer 41 and the second sub-layer 42 can be the same or different, and can be designed according to specific products.

[0061] See also Figure 3 In the second embodiment of the present application, a first through hole 43 is provided on the second sub-layer 42 at a position between two adjacent accommodating grooves 4a, and in the thickness direction of the display panel 100, the first through hole 43 extends to penetrate the first sub-layer 41, and the organic light-emitting layer 312 is exposed from the first through hole 43; wherein the opening 4b includes the first through hole 43; the cathode 313 is provided on the second sub-layer 42, and the cathode 313 partially extends into the first through hole 43 and is provided on the organic light-emitting layer 312.

[0062] In addition, a first groove 46 is set on the side of the first sub-layer 41 facing the second sub-layer 42, and a second groove 47 is set on the side of the second sub-layer 42 facing the first sub-layer 41. The second groove 47 is opposite to the notch of the first groove 46 and together forms the accommodating groove 4a, and the light-shielding wall 21 is accommodated in the first groove 46 and the second groove 47.

[0063] The difference from the first embodiment is that, in the second embodiment, the isolation layer 4 includes a first sub-layer 41 and a second sub-layer 42. A first groove 46 and a second groove 47 are respectively provided on the opposing surfaces of the first sub-layer 41 and the second sub-layer 42. The light-shielding barrier 21 is accommodated within the first groove 46 and the second groove 47. The provision of the first groove 46 and the second groove 47 not only fully encloses the light-shielding barrier 21, thereby preventing burrs on the edges of the light-shielding barrier 21, but also reduces the thickness of the first sub-layer 41 and the second sub-layer 42, thereby reducing the overall thickness of the display panel 100.

[0064] Meanwhile, the first through hole 43 is provided on the second sub-layer 42 . In the thickness direction of the display panel 100 , the first through hole 43 extends through the first sub-layer 41 to form the opening 4 b , thereby simplifying the manufacturing process of the opening 4 b .

[0065] See also Figure 4In the third embodiment of the present application, a second through hole 44 is provided on the first sub-layer 41 at a position between two adjacent accommodating grooves 4a, and the second sub-layer 42 partially extends into the second through hole 44 to form a filling portion 421, and a third through hole 45 is provided on the filling portion 421, and the organic light-emitting layer 312 is exposed from the third through hole 45, and the aperture of the third through hole 45 is smaller than the second through hole 44; wherein the opening 4b includes the third through hole 45; the cathode 313 is provided on the second sub-layer 42, and the cathode 313 partially extends into the third through hole 45 and is provided on the organic light-emitting layer 312.

[0066] In addition, a first groove 46 is set on the first sub-layer 41 to form the accommodating groove 4a. The first groove 46 is located on the side of the first sub-layer 41 facing the second sub-layer 42. The light-shielding wall 21 is accommodated in the first groove 46 and is flush with the notch of the first groove 46.

[0067] The difference from the second embodiment is that, in the third embodiment, the accommodating groove 4a is provided on the side of the first sub-layer 41 facing the second sub-layer 42, and the light-shielding wall 21 is accommodated in the first groove 46 and is flush with the notch of the first groove 46; in this way, the flattening of the surface of the second sub-layer 42 facing away from the flat layer 5 can be ensured.

[0068] At the same time, the second through hole 44 is set on the first sub-layer 41, the second sub-layer 42 partially extends into the second through hole 44 and forms the filling portion 421, and the third through hole 45 is set on the filling portion 421 to form the opening 4b; in this way, the light-shielding wall 21 is sequentially covered by the first sub-layer 41 and the second sub-layer 42, thereby further improving the isolation layer 4's ability to block the edge burrs of the light-shielding wall 21.

[0069] It can be known that, in the third embodiment, the organic light-emitting layer 312 is exposed from the third through hole 45, and the light-emitting device 31 emits light from the third through hole 45; the refractive index of the first sub-layer 41 is set to be smaller than the refractive index of the second sub-layer 42, that is, the material of the first sub-layer 41 is set to a low-refractive material, and the material of the second sub-layer 42 is set to a high-refractive material. When the light emitted by the light-emitting device 31 enters the first sub-layer 41 from the second sub-layer 42, the light will be reflected at the interface between the first sub-layer 41 and the second sub-layer 42, thereby reducing the light entering the first sub-layer 41, and further reducing the light blocked and absorbed by the light-shielding wall 21.

[0070] It should be noted that the structure of "the accommodating groove 4a and the light-shielding wall 21" in the second embodiment can also be applied to the third embodiment, and the structure of "the accommodating groove 4a and the light-shielding wall 21" in the third embodiment can also be applied to the second embodiment, and no specific restrictions are made here.

[0071] As described above, the isolation layer 4 includes a first sub-layer 41 and a second sub-layer 42, and the first groove 46 is set on at least one surface of the first sub-layer 41 facing the second sub-layer 42 to form the accommodating groove 4a, and the light-shielding wall 21 is located between the first sub-layer 41 and the second sub-layer 42, and is at least partially accommodated in the first groove 46.

[0072] In the present application, in order to ensure the flatness of the surface of the second sub-layer 42 facing away from the flat layer 5, in the thickness direction of the display panel 100, the thickness of the first sub-layer 41 is set to T1, and the thickness of the second sub-layer 42 is set to T2, and the thickness T2 of the second sub-layer 42 is set to be greater than or equal to the thickness T1 of the first sub-layer 41.

[0073] In this application, please refer to Figure 3 and Figure 4 In the thickness direction of the display panel 100, the thickness of the first sub-layer 41 is set to T1, the thickness of the second sub-layer 42 is set to T2, and the depth of the first groove 46 is set to T3, wherein (T1-T3) is less than 1 / 5 (T1+T2). It should be noted that in order to maintain the overall thickness of the display panel 100, the thickness of the composite film layer composed of the first sub-layer 41, the light-shielding wall 21 and the second sub-layer 42 is almost the same as the thickness of the pixel definition layer in the prior art, which is usually set to 1μm to 2μm; in this way, the thickness of the first sub-layer 41 and the second sub-layer 42 cannot be too thick. On the basis of ensuring that the first sub-layer 41 and the second sub-layer 42 can completely cover the light-shielding wall 21, the thickness T1-T3 of the first sub-layer 41 after forming the first groove 46 needs to be less than 1 / 5 (T1+T2).

[0074] It should be noted that the above two technical features can be set either one or both. In one embodiment, the above two technical features are set simultaneously.

[0075] The manufacturing process of the display panel 100 is described below by taking the second embodiment as an example.

[0076] See also Figure 5aFirst, an array substrate 1 is provided. A flat layer 5 is provided on the array substrate 1 , and an anode 311 is provided on the flat layer 5 ; a first sublayer 41 is provided on the flat layer 5 , and the first sublayer 41 covers the anode 311 .

[0077] See also Figure 5b A first groove 46 is etched on the side of the first sub-layer 41 facing away from the planar layer 5 , and the first groove 46 is at least partially located between two adjacent anodes 311 .

[0078] See also Figure 5c The black pixel definition layer 2 is deposited on the side of the first sub-layer 41 facing away from the planar layer 5 , and a portion of the black pixel definition layer 2 extends to be located in the first groove 46 .

[0079] See also Figure 5d The black pixel definition layer 2 is patterned using a mask to form a plurality of light-shielding walls 21 , each of which is located in one of the first grooves 46 , and on the side away from the flat layer 5 , the light-shielding wall 21 is arranged beyond the notch of the first groove 46 .

[0080] See also Figure 5e A second sub-layer 42 is formed on the side of the first sub-layer 41 away from the flat layer 5 , and the second sub-layer 42 covers the light-shielding barrier 21 .

[0081] See also Figure 5f A first through hole 43 is etched on the side of the second sub-layer 42 facing away from the first sub-layer 41 , wherein the first through hole 43 corresponds to the position of the anode 311 and passes through the first sub-layer 41 so that the anode 311 is exposed from the first through hole 43 .

[0082] See also Figure 5g An organic light-emitting layer 312 is fabricated in the first through hole 43 , and a cathode 313 is fabricated on the side of the second sub-layer 42 facing away from the first sub-layer 41 . Part of the cathode 313 extends into the first through hole 43 and is disposed on the organic light-emitting layer 312 .

[0083] In the second embodiment, the first groove 46 is provided on the first sub-layer 41, and the light-shielding wall 21 is provided beyond the notch of the first groove 46; the second sub-layer 42 is made on the side of the first sub-layer 41 away from the flat layer 5, and when the second sub-layer 42 covers the light-shielding wall 21, the second sub-layer 42 forms a second groove 47 on the side of the first sub-layer 41 to avoid the light-shielding wall 21; by providing the first groove 46 and the second groove 47, on the one hand, the light-shielding wall 21 is fully wrapped, thereby blocking the burrs on the edge of the light-shielding wall 21; on the other hand, the setting thickness of the first sub-layer 41 and the second sub-layer 42 can be reduced, thereby reducing the overall thickness of the display panel 100.

[0084] In a second aspect, embodiments of the present application provide a display device. The display device includes a display panel 100. It should be noted that the display panel 100 is configured as the display panel 100 described above. That is, the display panel 100 includes all the technical features of the display panel 100 described above. The display device includes all embodiments of the display panel 100 described above and thus possesses all the technical effects of the above embodiments, which will not be detailed here.

[0085] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0086] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0087] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0088] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display panel, characterized in that: include: array substrate; a planar layer, disposed on the array substrate; A black pixel definition layer is disposed on the planar layer, wherein the black pixel definition layer includes a plurality of light-shielding walls arranged in a crisscross pattern and defines a plurality of light-emitting areas; as well as, a light-emitting device layer comprising a plurality of light-emitting devices, each of the light-emitting devices being located in one of the light-emitting regions, the light-emitting devices comprising an anode disposed on the planar layer, an organic light-emitting layer disposed on the anode, and a cathode; The display panel further includes an isolation layer disposed on the flat layer, the isolation layer being provided with a receiving groove for accommodating the light-shielding wall, the isolation layer being provided with an opening at a position between two adjacent receiving grooves, and the organic light-emitting layer being exposed from the opening; The isolation layer includes a first sublayer and a second sublayer, the receiving groove is provided between the first sublayer and the second sublayer, and the opening passes through the first sublayer and the second sublayer; the refractive index of the first sublayer is less than the refractive index of the second sublayer; The cathode is disposed on the second sub-layer, and the cathode portion extends into the opening and is disposed on the organic light-emitting layer.

2. The display panel according to claim 1, wherein The first sub-layer is arranged on the flat layer, the second sub-layer is arranged on the first sub-layer, the light-shielding wall is located between the first sub-layer and the second sub-layer, and is accommodated in the accommodation groove.

3. The display panel according to claim 2, wherein: A first through hole is provided on the second sub-layer at a position between two adjacent receiving grooves, and the first through hole extends through the first sub-layer in the thickness direction of the display panel to form the opening; The cathode is disposed on the second sub-layer, and a portion of the cathode extends into the first through hole and is disposed on the organic light-emitting layer.

4. The display panel according to claim 2, wherein: A second through hole is provided on the first sub-layer at a position between two adjacent receiving grooves, the second sub-layer partially extends into the second through hole to form a filling portion, a third through hole is provided on the filling portion, and the organic light-emitting layer is exposed from the third through hole to form the opening; The cathode is disposed on the second sub-layer, and a portion of the cathode extends into the third through hole and is disposed on the organic light-emitting layer.

5. The display panel according to claim 2, wherein: A first groove is provided on the first sub-layer to form the accommodating groove. The first groove is located on the side of the first sub-layer facing the second sub-layer. The light-shielding wall is accommodated in the first groove and is flush with the notch of the first groove.

6. The display panel according to claim 2, wherein: A first groove is set on the side of the first sublayer facing the second sublayer, and a second groove is set on the side of the second sublayer facing the first sublayer. The second groove is opposite to the notch of the first groove and together forms the accommodating groove. The light-shielding wall is accommodated in the first groove and the second groove.

7. The display panel according to claim 5 or 6, wherein: In the thickness direction of the display panel, wherein: The thickness of the second sub-layer is greater than or equal to the thickness of the first sub-layer; and / or, The thickness of the first sublayer is set to T1, the thickness of the second sublayer is set to T2, and the depth of the first groove is set to T3, wherein (T1-T3) is less than 1 / 5 (T1+T2).

8. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 7.

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