Display panel and display device

Abstract

The invention relates to a display panel and a display device. The display panel comprises 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, comprises a plurality of shading retaining walls which are crisscrossed, and defines a plurality of light-emitting areas; the light-emitting device layer comprises a plurality of light-emitting devices, each light-emitting device is located in one light-emitting area, and each light-emitting device comprises an anode arranged on the flat layer, an organic light-emitting layer arranged on the anode and a cathode; the display panel further comprises an isolation layer arranged on the flat layer, containing grooves used for containing the shading retaining walls are formed in the isolation layer, an opening is formed in the position, between every two adjacent containing grooves, of the isolation layer, and the organic light-emitting layer is exposed from the opening. The cathode is disposed on the isolation layer, partially extends into the opening, and is disposed 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 folding screens, PLP (Pol Less Panel, Chinese abbreviation: removing the polarizer from the display panel) technology is now introduced. BM (Black Matrix, Chinese abbreviation: 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, Chinese abbreviation: 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 respectively, 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 producing dark spots. Summary of the invention

[0004] The embodiments of the present application provide a display panel and a display device, which solve the problem of dark spots caused by burrs on the edge of a black pixel definition layer penetrating the cathode of a light-emitting pixel and causing it to short-circuit with the anode.

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

[0006] An array substrate;

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

[0008] A black pixel definition layer is disposed on the flat 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; and

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

[0010] The display panel further comprises an isolation layer disposed 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;

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

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

[0013] The light-shielding barrier is located on a side of the isolation layer away from the flat layer and is accommodated in the accommodation 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 contained in the containing 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 accommodating 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 the cathode portion 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, a portion of the second sub-layer extends into the second through hole and forms 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 the cathode portion 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, 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 a side of the first sublayer facing the second sublayer, and a second groove is provided on a side of the second sublayer facing the first sublayer. 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 sub-layer is set to T1, the thickness of the second sub-layer 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 a light emitting area is defined by a light-shielding wall 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, a receiving groove for accommodating the light-shielding wall is arranged on the isolation layer, and an opening is arranged at a position between two adjacent receiving grooves to expose the organic light-emitting layer; a cathode is arranged on the isolation layer, and a portion of the cathode extends into the opening and is arranged on the organic light-emitting layer; by arranging the light-shielding wall in the receiving groove of the isolation layer, the bottom and side of the light-shielding wall can be covered, thereby blocking the burrs on the edge of the light-shielding wall, 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] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[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 figure numbers represent the same parts in the following description.

[0032] Figure 1a It is a plan view schematic diagram of a light emitting device layer in the prior art;

[0033] Figure 1b It 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 a light-emitting device layer provided in an embodiment of the present application;

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

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

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

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

[0040] Figure 5d A flow chart of a display panel (making a light-shielding wall) provided in an embodiment of the present application;

[0041] Figure 5e A flow chart of a display panel (making a second sub-layer) provided in an embodiment of the present application;

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

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

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than 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 embodiments of the present application provide a display panel 100 and a display device. The following are detailed descriptions of each. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

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

[0047] In a first aspect, the present application embodiment provides a display panel 100, see 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 criss-crossed light-shielding walls 21, and defines 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] For your information, please refer to Figure 1a and Figure 1b In the display panel 100', a flat layer 5' is usually set on the array substrate 1' as an encapsulation layer, and a color filter layer is set on the flat layer 5' to form a COE (full name in English: CF on Encapsulation, Chinese abbreviation: color filter on encapsulation layer) structure to replace the polarizer, which is beneficial to the display panel 100' to reduce power consumption, improve color gamut, reduce thickness, and improve bending performance. Usually, in order to maintain the brightness of light, the BM opening will be set relatively large, and in order to reduce the reflection of ambient light, BlackPDL (black pixel definition layer 2') will be 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, during the manufacturing process of the black pixel definition layer 2', the ink material will aggregate and settle when solidified, and the surface of the black pixel definition layer 2' will be excessively bonded during the etching process, so that the light-shielding wall 21' has large burrs and uneven edges. In the subsequent manufacturing 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 the cathode 313' and the anode 311' to short-circuit, thereby causing 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 baffle 21 is arranged on the isolation layer 4, and an opening 4b is arranged on the isolation layer 4 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 baffle 21 in the receiving groove 4a of the isolation layer 4, at least the bottom and side of the light-shielding baffle 21 can be covered, thereby blocking the burrs on the edge of the light-shielding baffle 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 , and the isolation layer 4 may adopt a conventional pixel definition layer in the existing display panel 100 ; the material of the isolation layer 4 may be photoresist, organic polymer or inorganic material, etc., and may 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 isolation layer 4 is provided with the receiving groove 4a on the side thereof away from the flat layer 5, and the isolation layer 4 is provided with the opening 4b at a position between two adjacent receiving grooves 4a; wherein the light-shielding baffle wall 21 is located on the side of the isolation layer 4 away from the flat layer 5, and is accommodated in the receiving 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 the side of the light-shielding baffle 21 can be covered, thereby blocking the burrs on the edge of the light-shielding baffle 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 baffle wall 21 is accommodated in the receiving groove 4a, and on the side away from the flat layer 5, the light-shielding baffle wall 21 can exceed the notch of the receiving groove 4a, the light-shielding baffle wall 21 can be lower than the notch of the receiving groove 4a, and the light-shielding baffle wall 21 can be flush with the notch of the receiving groove 4a; in order to further increase the coverage range of the light-shielding baffle 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 baffle 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 receiving 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 receiving groove 4a; the cathode 313 is arranged on the second sublayer 42.

[0057] That is, the isolation layer 4 is configured as a first sublayer 41 and a second sublayer 42 which are stacked, and the light shielding wall 21 is sandwiched between the first sublayer 41 and the second sublayer 42, so as to fully wrap the light shielding wall 21, thereby blocking the burrs on the edge of the light shielding wall 21. At the same time, the opening 4b penetrates the first sublayer 41 and the second sublayer 42, so that the organic light-emitting layer 312 is exposed from the opening 4b, and the cathode 313 is disposed on the second sublayer 42, and the cathode 313 partially extends into the opening 4b and is disposed on the organic light-emitting layer 312, so as to ensure the light-emitting performance of the light-emitting device 31.

[0058] The present application does not limit 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, which 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 may directly penetrate the first sub-layer 41 and the second sub-layer 42, or through holes may be sequentially provided in the first sub-layer 41 and the second sub-layer 42 to jointly form the opening 4b. The design may 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 a portion of the cathode 313 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 provided on the side of the first sub-layer 41 facing the second sub-layer 42, and a second groove 47 is provided 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 the first sub-layer 41 and the second sub-layer 42, and the first groove 46 and the second groove 47 are respectively provided on the two opposite sides of the first sub-layer 41 and the second sub-layer 42, and the light shielding wall 21 is accommodated in the first groove 46 and the second groove 47. 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 thickness of the first sub-layer 41 and the second sub-layer 42 can be reduced, so that the overall thickness of the display panel 100 can be reduced.

[0064] Meanwhile, the first through hole 43 is disposed on the second sub-layer 42 . In the thickness direction of the display panel 100 , the first through hole 43 extends to penetrate 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, at a position between two adjacent accommodating grooves 4a, a second through hole 44 is arranged on the first sub-layer 41, 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 arranged 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 arranged on the second sub-layer 42, and the cathode 313 partially extends into the third through hole 45 and is arranged on the organic light-emitting layer 312.

[0066] Furthermore, a first groove 46 is provided 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 arranged 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 arranged 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 arranged 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 arranged 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 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, without specific limitation 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 side 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 sublayer 41 is set to T1, the thickness of the second sublayer 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 sublayer 41, the light-shielding baffle 21 and the second sublayer 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 sublayer 41 and the second sublayer 42 cannot be too thick. On the basis of ensuring that the first sublayer 41 and the second sublayer 42 can completely cover the light-shielding baffle 21, the thickness T1-T3 of the first sublayer 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 at the same time. In one embodiment, the above two technical features are set at the same time.

[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, on which a planar layer 5 is provided, on which an anode 311 is provided; and on which a first sublayer 41 is provided, on which the planar layer 5 is provided, and which covers the anode 311 .

[0077] See also Figure 5b A first groove 46 is etched on a 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 a 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 away from the first sub-layer 41 , wherein the first through hole 43 corresponds to the position of the anode 311 , and the first through hole 43 penetrates 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 a side of the second sublayer 42 away from the first sublayer 41 . A portion 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 set on the first sub-layer 41, and the light-shielding baffle 21 is set 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 baffle 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 baffle 21; by setting the first groove 46 and the second groove 47, on the one hand, the light-shielding baffle 21 is fully wrapped, thereby blocking the burrs on the edge of the light-shielding baffle 21; on the other hand, the setting thickness of the first sub-layer 41 and the second sub-layer 42 can be reduced, so that the overall thickness of the display panel 100 can be thinned.

[0084] In a second aspect, an embodiment of the present application provides a display device. The display device includes a display panel 100. It should be noted that the display panel 100 is set as the above-mentioned display panel 100, that is, the display panel 100 includes all the technical features of the above-mentioned display panel 100, and the display device includes all the embodiments of the above-mentioned display panel 100, and also has all the technical effects of the above-mentioned embodiments, which will not be described one by one here.

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

[0086] In the above embodiments, the description of each embodiment has its own emphasis. 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 only 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: An array substrate; A planar layer, disposed on the array substrate; A black pixel definition layer is disposed on the flat layer, wherein the black pixel definition layer includes a plurality of light-shielding walls arranged in a criss-cross 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 which is located in one of the light-emitting regions, and the light-emitting device comprises an anode disposed on the planar layer, an organic light-emitting layer disposed on the anode, and a cathode; The display panel further comprises an isolation layer disposed 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 disposed on the isolation 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 isolation layer is configured as a single film layer structure, the isolation layer is provided with the receiving groove on a side thereof away from the flat layer, and the isolation layer is provided with the opening at a position between two adjacent receiving grooves; The light-shielding barrier is located on a side of the isolation layer away from the flat layer and is accommodated in the accommodation groove.

3. The display panel according to claim 1, wherein: 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; Wherein, the light-shielding wall is located between the first sub-layer and the second sub-layer, and is contained in the containing groove; The cathode is disposed on the second sub-layer.

4. The display panel according to claim 3, wherein: A first through hole is provided on the second sub-layer at a position between two adjacent accommodating 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 the cathode portion extends into the first through hole and is disposed on the organic light-emitting layer.

5. The display panel according to claim 3, wherein: A second through hole is provided on the first sub-layer at a position between two adjacent accommodating grooves, a portion of the second sub-layer 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 the cathode portion extends into the third through hole and is disposed on the organic light-emitting layer.

6. The display panel according to claim 5, wherein: The refractive index of the first sub-layer is smaller than the refractive index of the second sub-layer.

7. The display panel according to claim 3, wherein: A first groove is arranged on the first sub-layer to form the accommodation 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 arranged flush with the notch of the first groove.

8. The display panel according to claim 3, 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, and the light-shielding wall is accommodated in the first groove and the second groove.

9. The display panel according to claim 7 or 8, characterized in that: 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 sub-layer is set to T1, the thickness of the second sub-layer 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).

10. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-9.

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