Display panel and display device

Abstract

The present application discloses a display panel and a display device, wherein the display panel includes a substrate, a signal line layer, a first inorganic layer, a first planarization layer, a second planarization layer, and a second inorganic layer. The first inorganic layer and the second inorganic layer are stacked and cover at least a portion of the area where the first wiring is located to form protection for the first wiring. The first inorganic layer and the second inorganic layer are made of the same material, which can improve the adhesion between the first inorganic layer and the second inorganic layer, and improve the problem of mismatch in the film stress of the first inorganic layer and the second inorganic layer caused by the different materials of the first inorganic layer and the second inorganic layer, thereby improving the problem of the first wiring being easily broken and the display panel displaying abnormalities in the drop ball test due to the low adhesion between the first inorganic layer and the second inorganic layer, thereby improving the performance reliability of the display panel.

Description

Technical Field

[0001] The present application relates to the field of display, and in particular to a display panel and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) and flat-panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, power saving, thin body, and wide application range, becoming the mainstream display device.

[0003] Traditional display panel manufacturing typically uses a fine metal mask (FMM) to pattern luminescent pixels. FMM technology is mature and boasts extensive mass production experience. However, it also suffers from limitations such as limited precision, high development costs, and long development cycles. FMM-free technology eliminates the limitations of traditional OLED processes on display size, resolution, and other performance characteristics, offering the advantages of high performance, full-area scalability, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe FMM-free technology for reference.

[0004] However, the performance reliability of current OLED display products needs to be improved. Summary of the Invention

[0005] The embodiments of the present application provide a display panel and a display device, aiming to improve the performance reliability of OLED display products.

[0006] A first aspect of the present application provides a display panel, which has a display area and a non-display area surrounding the display area, the non-display area including a test area, and the display panel further includes: a substrate; a signal line layer located on one side of the substrate substrate, the signal line layer including a first routing line located in the non-display area; a first inorganic layer located on a side of the signal line layer facing away from the substrate substrate; a first planarization layer located on a side of the first inorganic layer facing away from the substrate substrate; a second planarization layer located between the first planarization layer and the first inorganic layer; a second inorganic layer located on a side of the first inorganic layer facing away from the substrate substrate, the first inorganic layer and the second inorganic layer being stacked in the test area; wherein, the orthographic projection of at least part of the first routing line on the substrate substrate is located within the orthographic projections of the first inorganic layer and the second inorganic layer on the substrate substrate, the first planarization layer and the second planarization layer between the first inorganic layer and the second inorganic layer are both at least partially removed, the materials of the first inorganic layer and the second inorganic layer are the same and are in contact at the partially removed portions of the first planarization layer and the second planarization layer.

[0007] According to the implementation of the first aspect of the present application, the display panel also includes: a pixel definition layer, located on the side of the second inorganic layer facing away from the base substrate, the pixel definition layer and the second inorganic layer are stacked in the non-display area, and at least part of the first line's orthographic projection on the base substrate is located within the orthographic projection of the pixel definition layer on the base substrate.

[0008] According to any of the aforementioned embodiments of the first aspect of the present application, the pixel definition layer and the second inorganic layer are made of the same material.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, the material of the pixel definition layer includes an inorganic material.

[0010] According to any of the aforementioned embodiments of the first aspect of the present application, the material of the first inorganic layer includes an inorganic material.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, the material of the second inorganic layer includes an inorganic material.

[0012] According to any of the aforementioned embodiments of the first aspect of the present application, the pixel definition layer has a first side surface away from the display area in a direction pointing from the display area to the first wiring, and a first bottom surface facing the substrate and connected to the first side surface, and a first angle is formed between the first side surface and the first bottom surface, and the first angle is less than or equal to 30°.

[0013] According to any of the aforementioned embodiments of the first aspect of the present application, the second inorganic layer has a second side surface away from the display area in a direction pointing from the display area to the first wiring, and a second bottom surface facing the substrate and connected to the second side surface, and a second angle is provided between the second side surface and the second bottom surface, and the second angle is less than or equal to 30°.

[0014] According to any of the aforementioned embodiments of the first aspect of the present application, the display panel also includes: a pixel definition layer, located on the side of the first inorganic layer in the display area facing away from the base substrate, the pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion, and the pixel definition layer is in the same layer and material as the second inorganic layer.

[0015] According to any of the aforementioned embodiments of the first aspect of the present application, the first inorganic layer has a third side surface away from the display area in the direction pointing to the first wiring from the display area and a third bottom surface facing the substrate and connected to the third side surface, and there is a third angle between the third side surface and the third bottom surface, and the third angle is less than or equal to 30°.

[0016] According to any of the aforementioned embodiments of the first aspect of the present application, the display panel also includes: a first encapsulation layer, located on the side of the second inorganic layer facing away from the base substrate; a second encapsulation layer, located on the side of the first encapsulation layer facing away from the base substrate; and a third encapsulation layer, located on the side of the second encapsulation layer facing away from the base substrate.

[0017] According to any of the aforementioned embodiments of the first aspect of the present application, the material of the first encapsulation layer includes an inorganic material.

[0018] According to any of the aforementioned embodiments of the first aspect of the present application, the material of the second encapsulation layer includes an organic material.

[0019] According to any of the aforementioned embodiments of the first aspect of the present application, the material of the third encapsulation layer includes an inorganic material.

[0020] According to any of the aforementioned embodiments of the first aspect of the present application, the orthographic projection of at least part of the first trace on the substrate is located within the orthographic projection of the third packaging layer on the substrate.

[0021] According to any of the aforementioned embodiments of the first aspect of the present application, the material of the third encapsulation layer is the same as the material of the second inorganic layer.

[0022] According to any of the aforementioned embodiments of the first aspect of the present application, the first planarization layer includes a first portion located in the non-display area, and the orthographic projection of the first portion on the substrate is located on a side of the orthographic projection of the first trace on the substrate away from the display area.

[0023] According to any of the aforementioned embodiments of the first aspect of the present application, the orthographic projection of the first section on the base substrate is spaced apart from the orthographic projection of the second inorganic layer on the base substrate.

[0024] According to any of the aforementioned embodiments of the first aspect of the present application, the second planarization layer includes a second portion located in the non-display area, and the orthographic projection of the second portion on the base substrate is located within the orthographic projection of the first portion on the base substrate.

[0025] According to any of the aforementioned embodiments of the first aspect of the present application, the first section has a first edge facing the display area, the second inorganic layer has a second edge away from the display area in a direction pointing to the first wiring along the display area, and the distance between the first edge and the second edge is a first distance, and the first distance is 90μm ~140μm.

[0026] According to any of the aforementioned embodiments of the first aspect of the present application, the second section has a third edge facing the display area, and the distance between the first edge and the third edge is a second distance, which is 10 μm to 30 μm.

[0027] According to any of the aforementioned embodiments of the first aspect of the present application, the non-display area includes a non-bending area and a bending area located on a side of the non-bending area away from the display area, and at least part of the first trace is located in the bending area.

[0028] According to any of the aforementioned embodiments of the first aspect of the present application, the orthographic projection of the first trace located in the bending region on the base substrate is located within the orthographic projections of the first inorganic layer and the second inorganic layer on the base substrate.

[0029] According to any of the aforementioned embodiments of the first aspect of the present application, the display panel further includes: an isolation structure located on one side of the base substrate, the isolation structure enclosing a plurality of isolation openings; a light-emitting layer located on one side of the base substrate, the light-emitting layer including a light-emitting unit at least partially located in the isolation openings; a first electrode layer located on the side of the light-emitting layer away from the base substrate, the first electrode layer including a plurality of first electrodes located in the plurality of isolation openings, and the first electrodes being electrically connected to the isolation structure.

[0030] According to any of the aforementioned embodiments of the first aspect of the present application, the isolation structure includes a first layer and a second layer located on the side of the first layer facing away from the substrate, and the orthographic projection of the first layer on the substrate is located within the orthographic projection of the second layer on the substrate.

[0031] According to any of the aforementioned embodiments of the first aspect of the present application, the first layer includes a conductive material.

[0032] According to any of the aforementioned embodiments of the first aspect of the present application, the second layer includes a conductive material or an insulating material.

[0033] According to any of the aforementioned embodiments of the first aspect of the present application, the first layer and the second layer both include metal materials, and the materials of the first layer and the second layer are different.

[0034] According to any of the aforementioned embodiments of the first aspect of the present application, the isolation structure further includes a third layer located on the side of the first layer facing the base substrate, and the orthographic projection of the first layer on the base substrate is located within the orthographic projection of the third layer on the base substrate.

[0035] According to a second aspect of the present application, there is provided a display panel, wherein the display panel has a display area and a non-display area surrounding the display area, wherein the non-display area includes a test area, and the display panel further includes: a substrate; a signal line layer located on one side of the substrate, wherein the signal line layer includes a first trace located in the test area; a first inorganic layer located on a side of the signal line layer facing away from the substrate; a first planarization layer located on a side of the first inorganic layer facing away from the substrate; a second planarization layer located between the first planarization layer and the first inorganic layer; a second inorganic layer located on a side of the first inorganic layer facing away from the substrate; and a pixel definition layer located on a side of the second inorganic layer facing away from the substrate, wherein the first inorganic layer, the second inorganic layer and the pixel definition layer are stacked in the test area, at least partially The orthographic projection of the first routing line on the substrate is located within the orthographic projection of the pixel definition layer on the substrate; the isolation structure is located on one side of the substrate, and the isolation structure encloses a plurality of isolation openings; the light-emitting layer is located on one side of the substrate, and the light-emitting layer includes a plurality of light-emitting units that are at least partially located in the corresponding isolation openings; wherein, at least part of the orthographic projection of the first routing line on the substrate is located within the orthographic projection of the first inorganic layer, the second inorganic layer and the pixel definition layer on the substrate, the first planarization layer and the second planarization layer between the pixel definition layer and the second inorganic layer are both at least partially removed, and the materials of at least two adjacent ones of the first inorganic layer, the second inorganic layer and the pixel definition layer are the same and are in contact at the partially removed locations of the first planarization layer and the second planarization layer.

[0036] According to an implementation of the second aspect of the present application, the pixel definition layer has a first side surface away from the display area in a direction pointing from the display area to the first wiring, and a first bottom surface facing the substrate and connected to the first side surface, and a first angle is formed between the first side surface and the first bottom surface, and the first angle is less than or equal to 30°.

[0037] According to any of the aforementioned embodiments of the second aspect of the present application, the second inorganic layer has a second side surface away from the display area in a direction pointing from the display area to the first wiring, and a second bottom surface facing the substrate and connected to the second side surface, and a second angle is provided between the second side surface and the second bottom surface, and the second angle is less than or equal to 30°.

[0038] According to any of the aforementioned embodiments of the second aspect of the present application, the non-display area includes a non-bending area and a bending area located on a side of the non-bending area away from the display area, and at least part of the first trace is located in the bending area.

[0039] According to any of the aforementioned embodiments of the second aspect of the present application, the orthographic projection of the first trace located in the bending area on the base substrate is located within the orthographic projections of the first inorganic layer and the second inorganic layer on the base substrate.

[0040] An embodiment of a third aspect of the present application provides a display device, which includes a display panel according to any of the above embodiments.

[0041] According to the display panel of the embodiment of the present application, the display panel includes a base substrate, a signal line layer, a first inorganic layer, a first planarization layer, a second planarization layer, and a second inorganic layer. The first inorganic layer and the second inorganic layer are stacked and cover at least a portion of the area where the first wiring is located to form protection for the first wiring. The materials of the first inorganic layer and the second inorganic layer are the same, which can improve the adhesion between the first inorganic layer and the second inorganic layer, and improve the problem of mismatch in the film stress of the first inorganic layer and the second inorganic layer caused by the different materials of the first inorganic layer and the second inorganic layer, thereby improving the problem that the adhesion between the first inorganic layer and the second inorganic layer is too low, resulting in the first wiring being easily broken in the drop ball test and the display panel having display abnormalities, thereby improving the performance reliability of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features and the accompanying drawings are not drawn to scale.

[0043] Figure 1 is a schematic top view of a display panel provided in an embodiment of the present application;

[0044] Figure 2 is a partial cross-sectional view of a non-display area of ​​a display panel provided by an embodiment of the present application;

[0045] Figure 3 is a partial cross-sectional view of a non-display area of ​​a display panel in another embodiment;

[0046] Figure 4 is a partial cross-sectional view of a display area of ​​a display panel provided in an embodiment of the present application;

[0047] Figure 5 is a partial cross-sectional view of a non-display area of ​​a display panel in another embodiment;

[0048] Figure 6 is a partial cross-sectional view of a non-display area of ​​a display panel in yet another embodiment;

[0049] Figure 7 is a partial cross-sectional view of a non-display area of ​​a display panel in yet another embodiment;

[0050] Figure 8 is a partial cross-sectional view of a non-display area of ​​a display panel in yet another embodiment;

[0051] Figure 9 is a partial cross-sectional view of a non-display area of ​​a display panel in yet another embodiment;

[0052] Figure 10is a partial top view of a non-display area of ​​a display panel provided by an embodiment of the present application;

[0053] Figure 11 is a schematic top view of a display panel in another embodiment;

[0054] Figure 12 FIG. 1 is a partial cross-sectional view of a display area of ​​a display panel in another embodiment.

[0055] Description of reference numerals:

[0056] 10. Display panel; AA, display area; NA, non-display area; NA1, non-bending area; NA2, bending area;

[0057] 100, substrate; 110, signal line layer; 111, first trace; 120, first inorganic layer; 121, third side surface; 122, third bottom surface; 130, second inorganic layer; 131, second side surface; 132, second bottom surface; 133, second edge;

[0058] 200, isolation structure; 210, first layer; 220, second layer; 230, third layer; 240, isolation opening;

[0059] 300, light-emitting layer; 310, light-emitting unit;

[0060] 400, first electrode layer; 410, first electrode;

[0061] 500, pixel definition layer; 501, first side surface; 502, first bottom surface; 503, fourth edge; 510, pixel defining portion; 520, pixel opening; 530, second electrode;

[0062] 600, third encapsulation layer; 610, fifth edge;

[0063] 700, first planarization layer; 710, first subsection; 711, first edge;

[0064] 800, second planarization layer; 810, second subsection; 811, third edge;

[0065] α, first angle; β, second angle; γ, third angle;

[0066] D1, first distance; D2, second distance; D3, third distance; D4, fourth distance; D5, fifth distance. DETAILED DESCRIPTION

[0067] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0068] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0069] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or region, it may mean that it is directly on the other layer or region, or that other layers or regions are included between it and the other layer or region. Furthermore, if the component is turned over, the layer or region will be "below" or "beneath" the other layer or region.

[0070] Embodiments of the present application provide a display panel and a display device. Various embodiments of the display panel and the display device will be described below with reference to the accompanying drawings.

[0071] An embodiment of the present application provides a display panel, which may be an organic light emitting diode (OLED) display panel.

[0072] See also Figure 1 and Figure 2 , Figure 1 is a schematic top view of a display panel provided in an embodiment of the present application; Figure 2 This is a partial cross-sectional view of a non-display area of ​​a display panel provided in an embodiment of the present application.

[0073] like Figure 1 and Figure 2As shown, the first embodiment of the present application provides a display panel 10, the display panel 10 having a display area AA and a non-display area NA surrounding the display area AA, the non-display area NA including a test area (not shown in the figure), the display panel 10 further comprising: a base substrate 100; a signal line layer 110, located on one side of the base substrate 100, the signal line layer 110 including a first trace 111 located in the test area; a first inorganic layer 120, located on a side of the signal line layer 110 away from the base substrate 100; a first planarization layer located on the first inorganic layer 120 A side away from the base substrate 100; a second planarization layer, located between the first planarization layer and the first inorganic layer 120; a second inorganic layer 130, located on the side of the first inorganic layer 120 away from the base substrate 100, the first inorganic layer 120 and the second inorganic layer 130 are stacked in the test area; wherein, at least a portion of the first trace 111 is located within the orthographic projection of the first inorganic layer 120 and the second inorganic layer 130 on the base substrate 100, and the materials of the first inorganic layer 120 and the second inorganic layer 130 are the same.

[0074] According to the display panel 10 of the embodiment of the present application, the display panel 10 includes a base substrate 100, a signal line layer 110, a first inorganic layer 120, a first planarization layer, a second planarization layer, and a second inorganic layer 130. The first inorganic layer 120 and the second inorganic layer 130 are stacked and cover at least a portion of the area where the first wiring 111 is located to provide protection for the first wiring 111. The first inorganic layer 120 and the second inorganic layer 130 are made of the same material, which can improve the adhesion between the first inorganic layer 120 and the second inorganic layer 130 and improve the problem of film stress mismatch between the first inorganic layer 120 and the second inorganic layer 130 due to the different materials of the first inorganic layer 120 and the second inorganic layer 130. This improves the problem that the first wiring 111 is easily broken during a drop ball test due to the low adhesion between the first inorganic layer 120 and the second inorganic layer 130, resulting in display abnormalities in the display panel 10, thereby improving the performance reliability of the display panel 10.

[0075] In the related art, in order to test the drop resistance of the display panel 10, a ball drop test is performed on the display surface after the display panel 10 is manufactured. The ball drop test may cause damage to the display panel 10. For example, when the ball drop test is performed on the first wiring 111 of the test area of ​​the display panel 10, due to the different materials and film stress mismatch between the film layers covering the first wiring 111, the first wiring 111 is easily damaged in the ball drop test, resulting in the first wiring 111 being broken, and the display panel 10 having display abnormalities and other undesirable phenomena. For example, in the related art, the first flat One of the planarization layer or the second planarization layer is disposed between the first inorganic layer 120 and the second inorganic layer 130, and the materials of the first planarization layer and the second planarization layer are different from the materials of the first inorganic layer 120 and the second inorganic layer 130. The film stress of one of the first planarization layer or the second planarization layer and the first inorganic layer 120 or the second inorganic layer 130 does not match, and the adhesion between the first planarization layer or the second planarization layer and the first inorganic layer 120 or the second inorganic layer 130 is poor. During the drop ball test, the first trace 111 is easily broken. Therefore, in the present application, the materials of the first inorganic layer 120 and the second inorganic layer 130 covering the first trace 111 are set to be consistent, which can match the film stress of the first inorganic layer 120 and the second inorganic layer 130, increase the adhesion between the film layers, and thus improve the display defects caused by the drop ball test.

[0076] There are many ways to configure the base substrate 100. For example, the base substrate 100 may include a substrate and an array substrate disposed on the substrate. Alternatively, the base substrate 100 is the substrate. Alternatively, the base substrate 100 may include a buffer layer and a support plate on a side facing away from the substrate.

[0077] Optionally, the material of the first inorganic layer 120 includes an inorganic material, such as silicon nitride or silicon oxide. The inorganic material has good density and good water and oxygen barrier capability, thereby improving the protection effect on the first trace 111 .

[0078] Optionally, the second inorganic layer 130 includes an inorganic material, such as silicon nitride or silicon oxide. Inorganic materials have good compactness and good water and oxygen barrier properties, thereby improving the protection of the first trace 111. When both the first inorganic layer 120 and the second inorganic layer 130 are inorganic materials, there is strong adhesion between the first inorganic layer 120 and the second inorganic layer 130, and the first inorganic layer 120 and the second inorganic layer 130 provide better protection for the first trace 111.

[0079] Optionally, the materials of the first inorganic layer 120 and the second inorganic layer 130 are both silicon nitride, which has good waterproof properties.

[0080] See also Figure 1 、 Figure 3 and Figure 4 , Figure 3 is a partial cross-sectional view of a non-display area of ​​a display panel in another embodiment; Figure 4 This is a partial cross-sectional view of a display area of ​​a display panel provided in an embodiment of the present application.

[0081] like Figure 1 、 Figure 3 and Figure 4 As shown, optionally, the display panel 10 further includes: a pixel definition layer 500, which is located on the side of the second inorganic layer 130 away from the base substrate 100, the pixel definition layer 500 and the second inorganic layer 130 are stacked in the non-display area NA, and at least part of the positive projection of the first wiring 111 on the base substrate 100 is located within the positive projection of the pixel definition layer 500 on the base substrate 100, and the pixel defining portion 510, the second inorganic layer 130 and the first inorganic layer 120 are stacked to form a covering protection for the first wiring 111, thereby reducing the risk of breakage of the first wiring 111 in a drop ball test.

[0082] Optionally, the pixel definition layer 500 includes a pixel defining portion 510 and a pixel opening 520 enclosed by the pixel defining portion 510 .

[0083] In these optional embodiments, the pixel defining portion 510 of the pixel definition layer 500 encloses a pixel opening 520 to accommodate the light-emitting unit 310 and ensure normal light emission of the light-emitting unit 310. Furthermore, the pixel defining portion 510 defines the placement area of ​​each light-emitting unit 310, thereby reducing color crosstalk between the light-emitting units 310.

[0084] In some optional embodiments, the pixel definition layer 500 and the second inorganic layer 130 are made of the same material.

[0085] In these optional embodiments, the pixel definition layer 500 and the second inorganic layer 130 are made of the same material, which can improve the adhesion between the pixel definition layer 500 and the second inorganic layer 130, and improve the problem of mismatch in film stress between the pixel definition layer 500 and the second inorganic layer 130 due to the different materials of the pixel definition layer 500 and the second inorganic layer 130. This improves the problem that the first trace 111 is easily broken in a drop ball test due to the low adhesion between the pixel definition layer 500 and the second inorganic layer 130, and the display abnormality of the display panel 10, thereby improving the performance reliability of the display panel 10.

[0086] Optionally, the material of the pixel definition layer 500 includes an inorganic material, such as silicon nitride or silicon oxide. The pixel definition layer 500 made of an inorganic material has better water and oxygen barrier capability, thereby improving the protection effect on the first wiring 111 .

[0087] Optionally, the materials of the pixel definition layer 500 , the first inorganic layer 120 and the second inorganic layer 130 are all silicon nitride, which has good waterproof properties.

[0088] In some optional embodiments, the internal stresses of the pixel definition layer 500 and the second inorganic layer 130 are both positive stresses or both negative stresses. For example, when the material of the pixel definition layer 500 and the second inorganic layer 130 is silicon oxide, the internal stresses of the pixel definition layer 500 and the second inorganic layer 130 are positive stresses. Alternatively, when the material of the pixel definition layer 500 and the second inorganic layer 130 is silicon nitride, the internal stresses of the pixel definition layer 500 and the second inorganic layer 130 are negative stresses.

[0089] In these optional embodiments, when the internal stresses of the pixel definition layer 500 and the second inorganic layer 130 are both positive stresses or both negative stresses, the film stresses between the pixel definition layer 500 and the second inorganic layer 130 are matched, and the adhesion between the film layers is improved, which can improve the problem of the first trace 111 being easily broken during the drop ball test.

[0090] Optionally, the internal stress of the pixel definition layer 500 is -390 MPa ~ -360 MPa. For example, the internal stress of the pixel definition layer 500 is -390 MPa, -380 MPa, -370 MPa, -360 MPa, etc. The internal stress of the pixel definition layer 500 is set within this range, so that the film stress between the pixel definition layer 500 and the second inorganic layer 130 is more matched, further improving the adhesion between the pixel definition layer 500 and the second inorganic layer 130.

[0091] See also Figure 5 , Figure 5 FIG. 4 is a partial cross-sectional view of a non-display area of ​​a display panel in another embodiment.

[0092] like Figure 5 As shown, in some optional embodiments, the pixel definition layer 500 has a first side surface 501 away from the display area AA in a direction pointing to the first trace 111 along the display area AA and a first bottom surface 502 facing the base substrate 100 and connected to the first side surface 501, and a first angle α is present between the first side surface 501 and the first bottom surface 502, and the first angle α is less than or equal to 30°, for example, the first angle α is 10°, 20°, 25°, or 30°.

[0093] In these optional embodiments, the first angle α is less than or equal to 30°, which can improve the problem of stress concentration in the pixel definition layer 500 caused by the first angle α being too large. In addition, the first angle α is less than or equal to 30°, so that the adhesion between the pixel definition layer 500 and other film layers on the side of the pixel definition layer 500 facing away from the base substrate 100 (such as the third encapsulation layer 600 mentioned later) can be improved.

[0094] like Figure 5 As shown, in some optional embodiments, the second inorganic layer 130 has a second side surface 131 away from the display area AA in the direction pointing to the first wiring 111 along the display area AA and a second bottom surface 132 facing the base substrate 100 and connected to the second side surface 131, and a second angle β is provided between the second side surface 131 and the second bottom surface 132, and the second angle β is less than or equal to 30°, for example, the second angle β is 10°, 20°, 25°, or 30°.

[0095] In these optional embodiments, the second angle β is less than or equal to 30°, which can improve the problem of stress concentration in the second inorganic layer 130 caused by the second angle β being too large, and the second angle β is less than or equal to 30°, so that the adhesion between other film layers (such as the pixel definition layer 500) on the side of the second inorganic layer 130 facing away from the base substrate 100 and the second inorganic layer 130 can be improved.

[0096] In some optional embodiments, the internal stresses of the first inorganic layer 120 and the second inorganic layer 130 are both positive stresses or both negative stresses.

[0097] In these optional embodiments, when the internal stresses of the first inorganic layer 120 and the second inorganic layer 130 are both positive stresses or both negative stresses, the film stresses between the first inorganic layer 120 and the second inorganic layer 130 are matched, and the adhesion between the film layers is improved, which can improve the problem that the first trace 111 is prone to breakage during the drop ball test.

[0098] Optionally, the internal stress of the first inorganic layer 120 is -390 MPa ~ -360 MPa, for example, the internal stress of the first inorganic layer 120 is -390 MPa, -380 MPa, -370 MPa, -360 MPa, etc. The internal stress of the first inorganic layer 120 is set within this range, so that the film stress between the first inorganic layer 120 and the second inorganic layer 130 is more matched, further improving the adhesion between the first inorganic layer 120 and the second inorganic layer 130.

[0099] Optionally, the internal stress of the second inorganic layer 130 is between -390 MPa and -360 MPa. For example, the internal stress of the second inorganic layer 130 is -390 MPa, -380 MPa, -370 MPa, or -360 MPa. Setting the internal stress of the second inorganic layer 130 within this range allows for a better match between the film stresses of the first inorganic layer 120 and the second inorganic layer 130, further improving the adhesion between the first inorganic layer 120 and the second inorganic layer 130. When a pixel definition layer 500 is provided on the side of the second inorganic layer 130 facing away from the base substrate 100, the adhesion between the pixel definition layer 500 and the second inorganic layer 130 can also be improved.

[0100] Optionally, the first inorganic layer 120, the second inorganic layer 130 and the pixel definition layer 500 are stacked on the side of the first trace 111 away from the base substrate 100, and the materials of the first inorganic layer 120, the second inorganic layer 130 and the pixel definition layer 500 are the same to improve the adhesion between the three film layers of the first inorganic layer 120, the second inorganic layer 130 and the pixel definition layer 500.

[0101] See also Figure 4 and Figure 6 , Figure 6 FIG. 4 is a partial cross-sectional view of a non-display area of ​​a display panel in yet another embodiment.

[0102] like Figure 4 and Figure 6 As shown, in some optional embodiments, the display panel 10 further includes: a pixel definition layer 500, located on the side of the first inorganic layer 120 in the display area AA facing away from the base substrate 100, the pixel definition layer 500 includes a pixel defining portion 510 and a pixel opening 520 formed by the pixel defining portion 510, and the pixel definition layer 500 is on the same layer as the second inorganic layer 130.

[0103] In these optional embodiments, the pixel definition layer 500 and the second inorganic layer 130 are of the same layer and material, that is, the pixel definition layer 500 is reused as the second inorganic layer 130, that is, the pixel definition layer 500 and the first inorganic layer 120 are stacked in the non-display area NA, and the pixel definition layer 500 and the first inorganic layer 120 are made of the same material, which can improve the adhesion between the first inorganic layer 120 and the pixel definition layer 500, and improve the problem of film stress mismatch between the first inorganic layer 120 and the pixel definition layer 500 due to the different materials of the first inorganic layer 120 and the pixel definition layer 500, thereby improving the problem that the first trace 111 is easily broken in the drop ball test due to the low adhesion between the first inorganic layer 120 and the pixel definition layer 500, and the display abnormality of the display panel 10, thereby improving the performance reliability of the display panel 10.

[0104] Optionally, the first inorganic layer 120 covers and contacts the first wiring 111 , and the pixel definition layer 500 covers and contacts the first inorganic layer 120 , that is, the first inorganic layer 120 and the pixel definition layer 500 cover and protect the first wiring 111 .

[0105] like Figure 6 As shown, in some optional embodiments, the first inorganic layer 120 has a third side surface 121 away from the display area AA in the direction of the first trace 111 along the display area AA and a third bottom surface 122 facing the base substrate 100 and connected to the third side surface 121, and a third angle γ is provided between the third side surface 121 and the third bottom surface 122, and the third angle γ is less than or equal to 30°, for example, the third angle γ is 10°, 20°, 25°, or 30°.

[0106] In these optional embodiments, the third angle γ is less than or equal to 30°, which can improve the problem of stress concentration in the first inorganic layer 120 caused by the third angle γ being too large, and the third angle γ is less than or equal to 30°, so that the adhesion between the first inorganic layer 120 and other film layers (such as the pixel definition layer 500) on the side of the first inorganic layer 120 away from the base substrate 100 can be improved.

[0107] See also Figure 7 , Figure 7 FIG. 4 is a partial cross-sectional view of a non-display area of ​​a display panel in another embodiment.

[0108] like Figure 7 Optionally, the display panel 10 further includes: a first encapsulation layer (not shown), located on the side of the second inorganic layer 130 facing away from the base substrate 100; a second encapsulation layer (not shown), located on the side of the first encapsulation layer facing away from the base substrate 100; and a third encapsulation layer 600, located on the side of the second encapsulation layer facing away from the base substrate 100. The first encapsulation layer, the second encapsulation layer, and the third encapsulation layer 600 together form an encapsulation for the display panel 10, thereby improving the encapsulation effect of the display panel 10.

[0109] Optionally, the material of the first encapsulation layer includes an inorganic material.

[0110] Optionally, the material of the second encapsulation layer includes organic material.

[0111] Optionally, the material of the third encapsulation layer 600 includes an inorganic material.

[0112] In some optional embodiments, an orthographic projection of at least a portion of the first trace 111 on the base substrate 100 is located within an orthographic projection of the third packaging layer 600 on the base substrate 100 .

[0113] In these optional embodiments, the third encapsulation layer 600 extends to the side of the first wiring 111 in the non-display area NA away from the base substrate 100, and together with the first inorganic layer 120 and the second inorganic layer 130 forms a covering protection for the first wiring 111, thereby improving the protection effect of the first wiring 111.

[0114] In some optional embodiments, the material of the third encapsulation layer 600 is the same as the material of the second inorganic layer 130 .

[0115] In these optional embodiments, the material of the third encapsulation layer 600 is the same as that of the second inorganic layer 130, which can improve the adhesion between the third encapsulation layer 600 and the second inorganic layer 130, and improve the problem of mismatch in film stress between the third encapsulation layer 600 and the second inorganic layer 130 caused by the difference between the material of the third encapsulation layer 600 and the material of the second inorganic layer 130. This improves the problem that the first trace 111 is easily broken in a drop ball test due to the low adhesion between the third encapsulation layer 600 and the second inorganic layer 130, and the display abnormality of the display panel 10, thereby improving the performance reliability of the display panel 10.

[0116] See also Figure 8 , Figure 8 FIG. 4 is a partial cross-sectional view of a non-display area of ​​a display panel in another embodiment.

[0117] like Figure 8 As shown, optionally, when the pixel definition layer 500 is provided on the side of the second inorganic layer 130 facing away from the base substrate 100, the material of the third encapsulation layer 600 is the same as that of the pixel definition layer 500, which can improve the adhesion between the third encapsulation layer 600 and the pixel definition layer 500, and improve the problem of mismatch in film stress between the third encapsulation layer 600 and the pixel definition layer 500 caused by the difference in material between the third encapsulation layer 600 and the pixel definition layer 500, thereby improving the problem that the first trace 111 is easily broken in a drop ball test due to the low adhesion between the third encapsulation layer 600 and the pixel definition layer 500, and the display abnormality of the display panel 10, thereby improving the performance reliability of the display panel 10.

[0118] See also Figure 1 and Figure 9 , Figure 9 FIG. 4 is a partial cross-sectional view of a non-display area of ​​a display panel in another embodiment.

[0119] like Figure 1 and Figure 9 As shown, in some optional embodiments, the first planarization layer 700 includes a first section 710 located in the non-display area NA, and the orthographic projection of the first section 710 on the base substrate 100 is located on the side of the orthographic projection of the first trace 111 on the base substrate 100 away from the display area AA.

[0120] In these optional embodiments, the first subsection 710 of the first planarization layer 700 can cover and protect a portion of the film layer of the display panel 10 in the non-display area NA. The first subsection 710 of the first planarization layer 700 is offset from the first wiring 111. The first inorganic layer 120 and the second inorganic layer 130 are disposed at the position of the first wiring 111 to cover and protect the first wiring 111. The first inorganic layer 120 and the second inorganic layer 130 are made of the same material and have good adhesion. This avoids the problem that the first subsection 710 is stacked with the first inorganic layer 120 and the second inorganic layer 130, and the adhesion between the first subsection 710 and the first inorganic layer 120 and the second inorganic layer 130 is poor, which may cause the first wiring 111 to easily break when a ball drop test is performed on the first wiring 111.

[0121] Optionally, the orthographic projection of the first division 710 on the base substrate 100 is spaced apart from the orthographic projection of the second inorganic layer 130 on the base substrate 100 to avoid the first division 710 and the first inorganic layer 120 and the second inorganic layer 130 being stacked. The adhesion between the first division 710 and the first inorganic layer 120 and the second inorganic layer 130 is poor, resulting in the first trace 111 being easily broken when a ball drop test is performed on the first trace 111.

[0122] Optionally, the first division 710 is spaced apart from the orthographic projection of the base substrate 100 and the orthographic projection of the first inorganic layer 120 on the base substrate 100 to avoid the first division 710 and the first inorganic layer 120 and the second inorganic layer 130 being stacked. The adhesion between the first division 710 and the first inorganic layer 120 and the second inorganic layer 130 is poor, resulting in the first trace 111 being easily broken when a ball drop test is performed on the first trace 111.

[0123] Optionally, the orthographic projection of the first division 710 on the base substrate 100 is spaced apart from the orthographic projection of the pixel definition layer 500 on the base substrate 100 to avoid the first division 710 and the first inorganic layer 120, the second inorganic layer 130, and the pixel definition layer 500 being stacked. The adhesion between the first division 710 and the first inorganic layer 120, the second inorganic layer 130, and the pixel definition layer 500 is poor, resulting in the first trace 111 being easily broken when a ball drop test is performed on the first trace 111.

[0124] Optionally, the orthographic projection of the first division 710 on the base substrate 100 is spaced from the orthographic projection of the third packaging layer 600 on the base substrate 100 to avoid the first division 710 and the first inorganic layer 120, the second inorganic layer 130, the pixel definition layer 500, and the third packaging layer 600 being stacked. The adhesion between the first division 710 and the first inorganic layer 120, the second inorganic layer 130, the pixel definition layer 500, and the third packaging layer 600 is poor, resulting in the first trace 111 being easily broken when a drop ball test is performed on the first trace 111.

[0125] In some optional embodiments, the second planarization layer 800 includes a second portion 810 located in the non-display area NA, and an orthographic projection of the second portion 810 on the base substrate 100 is located within an orthographic projection of the first portion 710 on the base substrate 100 .

[0126] In these optional embodiments, the first sub-portion 710 and the second sub-portion 810 together provide a protective covering for a portion of the film layer in the non-display area NA of the display panel 10. The orthographic projection of the second sub-portion 810 on the base substrate 100 is located within the orthographic projection of the first sub-portion 710 on the base substrate 100, that is, the second sub-portion 810 of the second planarization layer 800 is also staggered with the first trace 111, thereby preventing the second sub-portion 810 from being stacked with the first inorganic layer 120 and the second inorganic layer 130, resulting in poor adhesion between the second sub-portion 810 and the first inorganic layer 120 and the second inorganic layer 130, which could easily cause the first trace 111 to break during a ball drop test.

[0127] See also Figure 1 、 Figure 9 and Figure 10 , Figure 10 This is a partial top view of a non-display area of ​​a display panel provided in an embodiment of the present application.

[0128] like Figure 1 、 Figure 9 and Figure 10As shown, optionally, the first division 710 has a first edge 711 facing the display area AA, and the second inorganic layer 130 has a second edge 133 along the display area AA and in a direction pointing to the first wiring 111 away from the display area AA. The distance between the first edge 711 and the second edge 133 is a first distance D1, and the first distance D1 is 90μm~140μm. For example, the first distance D1 is 90μm, 100μm, 120μm, 140μm, etc., so that a certain distance is separated between the first division 710 and the second inorganic layer 130 of the first planarization layer 700, avoiding the first division 710 and the first inorganic layer 120 and the second inorganic layer 130 from being stacked, and the adhesion between the first division 710 and the first inorganic layer 120 and the second inorganic layer 130 is poor, resulting in the problem that the first wiring 111 is easily broken when a drop ball test is performed on the first wiring 111.

[0129] Optionally, the second division 810 has a third edge 811 facing the display area AA, and the distance between the first edge 711 and the third edge 811 is a second distance D2, and the second distance D2 is 10μm~30μm, for example, the second distance D2 is 10μm, 20μm, 25μm, 30μm, etc., so that the edge of the second division 810 is separated from the edge of the first division 710 by a certain distance, so that the first division 710 completely covers the second division 810, thereby improving the protection ability of the first division 710 and the second division 810 to the underlying film layer.

[0130] Optionally, the pixel definition layer 500 has a fourth edge 503 away from the display area AA in the direction of the first wiring 111 along the display area AA, and the distance between the second edge 133 and the fourth edge 503 is a third distance D3, and the third distance D3 is 10μm~20μm. For example, the third distance D3 is 10μm, 12μm, 18μm, 20μm, etc., so that the edge of the pixel definition layer 500 is separated by a certain distance from the edge of the second inorganic layer 130, so that the pixel definition layer 500 completely covers the second inorganic layer 130, thereby improving the protection ability of the second inorganic layer 130 and the pixel definition layer 500 to the underlying film layer.

[0131] Optionally, the third encapsulation layer 600 has a fifth edge 610 away from the display area AA in the direction pointing to the first trace 111 along the display area AA, and the distance between the fourth edge 503 and the fifth edge 610 is a fourth distance D4, and the fourth distance D4 is 40μm~60μm. For example, the third distance D3 is 40μm, 45μm, 50μm, 60μm, etc., so that the edge of the pixel definition layer 500 is separated from the edge of the third encapsulation layer 600 by a certain distance, so that the third encapsulation layer 600 completely covers the pixel definition layer 500, thereby improving the protection capability of the third encapsulation layer 600 and the pixel definition layer 500 to the underlying film layer.

[0132] Optionally, the distance between the first edge 711 and the fifth edge 610 is a fifth distance D5, and the fifth distance D5 is 40μm~60μm, for example, the third distance D3 is 40μm, 45μm, 50μm, 60μm, etc., so that the edge of the first division 710 is spaced a certain distance from the edge of the third packaging layer 600, avoiding the first division 710 and the third packaging layer 600 being stacked, and the adhesion between the first division 710 and the third packaging layer 600 is poor, resulting in the first trace 111 being easily broken when the first trace 111 is subjected to a drop ball test.

[0133] See also Figure 9 and Figure 11 , Figure 11 FIG. 4 is a schematic top view of a display panel in another embodiment.

[0134] like Figure 9 and Figure 11 As shown, in some optional embodiments, the non-display area NA includes a non-bending area NA1 and a bending area NA2 located on the side of the non-bending area NA1 away from the display area AA, and at least a portion of the first trace 111 is located in the bending area NA2. The display panel 10 bends in the bending area NA2, bending a portion of the film layer to the back of the display panel 10, facilitating connection with an integrated circuit (IC), which controls the display panel 10.

[0135] In these optional embodiments, the first inorganic layer 120 and the second inorganic layer 130 cover and protect the first wiring 111 in the bending area NA2, improving the adhesion between the film layers in the bending area NA2, making it less likely for the display panel 10 to experience film layer detachment when the display panel 10 is bent in the bending area NA2, thereby improving the reliability of the display panel 10. When the first wiring 111 is located in the bending area NA2, the first planarization layer 700 and the second planarization layer 800 are disposed on the side of the first wiring 111 away from the display area AA, thereby protecting the bending area NA2 and improving the structural strength of the bending area NA2. The first planarization layer 700 and the second planarization layer 800 are both organic materials with good bending properties, thereby improving the bending ability of the display panel 10 in the bending area NA2.

[0136] Optionally, the test area is located in the bending area NA2, and a drop ball test is performed in the test area, that is, a drop ball test is performed in the bending area NA2, and the above-mentioned improvement is performed on the film layer structure in the bending area NA2 to improve the reliability of the display panel 10.

[0137] Optionally, the orthographic projection of the first wiring 111 located in the bending area NA2 on the base substrate 100 is located within the orthographic projection of the first inorganic layer 120 and the second inorganic layer 130 on the base substrate 100, and the first inorganic layer 120 and the second inorganic layer 130 cover and protect the first wiring 111 in the bending area NA2. The adhesion between the film layers in the bending area NA2 is improved, making it difficult for the display panel 10 to have a defect of film layer falling off when the display panel 10 is bent in the bending area NA2, thereby improving the reliability of the display panel 10.

[0138] like Figure 4 As shown, in some optional embodiments, the display panel 10 includes a first metal layer, a second metal layer, a third metal layer, a first inorganic layer 120, a second planarization layer 800, a fourth metal layer, a first planarization layer 700 and a second inorganic layer 130 arranged in sequence in the display area AA along a direction away from the base substrate 100, and the third metal layer is arranged on the same layer as the signal line layer 110.

[0139] In these optional embodiments, the signal line layer 110 is co-located with the third metal layer, allowing the first trace 111 of the signal line layer 110 to be fabricated simultaneously with the third metal layer, simplifying the fabrication process. The second planarization layer 800 and the first inorganic layer 120 provide protective coverage for the third metal layer, while the first planarization layer 700 and the second inorganic layer 130 provide protective coverage for the fourth metal layer. The second inorganic layer 130 is positioned on one side of the first planarization layer 700, isolating the first planarization layer 700 from moisture and reducing the likelihood of the first planarization layer 700 absorbing moisture due to exposure.

[0140] Optionally, the third metal layer includes a source and a drain.

[0141] Optionally, the fourth metal layer includes power signal lines, data signal lines, etc.

[0142] In some optional embodiments, the display panel 10 further includes an isolation structure 200 located on one side of the base substrate 100 . The isolation structure 200 encloses a plurality of isolation openings 240 .

[0143] Optionally, the isolation structure 200 is located on a side of the second inorganic layer 130 facing away from the base substrate 100 .

[0144] Optionally, the display panel 10 further includes: a light emitting layer 300 located on one side of the base substrate 100 , and the light emitting layer 300 includes a light emitting unit 310 at least partially located in the isolation opening 240 .

[0145] In these optional embodiments, when preparing the light-emitting layer 300, the light-emitting layer 300 has a large drop at the edge of the isolation structure 200, which is difficult to connect and thus breaks. The light-emitting layer 300 breaks to form light-emitting units 310 that are disconnected from each other and located within the isolation opening 240. There is no need to use a precision mask plate, which can reduce the development and use of precision masks and reduce preparation costs.

[0146] In some optional embodiments, the display panel 10 further includes: a first electrode layer 400, located on the side of the light-emitting layer 300 facing away from the base substrate 100, the first electrode layer 400 includes a plurality of first electrodes 410 located in a plurality of isolation openings 240, and the first electrodes 410 are electrically connected to the isolation structure 200.

[0147] In these optional embodiments, the isolation structure 200 separates the first electrode layer 400 to form mutually spaced first electrodes 410 , and the mutually spaced first electrodes 410 are electrically connected through the isolation structure 200 to form a full-surface electrode, ensuring normal light emission of the light-emitting unit 310 .

[0148] Optionally, the display panel 10 further includes a second electrode 530 located between the base substrate 100 and the light-emitting unit 310. At least a portion of the second electrode 530 is exposed by the pixel opening 520 to serve as an electrode of the light-emitting unit 310, driving the light-emitting unit 310 to emit light. One of the first electrode 410 and the second electrode 530 serves as the anode of the light-emitting unit 310, and the other serves as the cathode of the light-emitting unit 310. This embodiment of the present application uses the first electrode 410 as the cathode of the light-emitting unit 310 and the second electrode 530 as the anode of the light-emitting unit 310 as an example.

[0149] In some optional embodiments, the isolation structure 200 includes a first layer 210 and a second layer 220 located on the side of the first layer 210 facing away from the base substrate 100 , and the orthographic projection of the first layer 210 on the base substrate 100 is located within the orthographic projection of the second layer 220 on the base substrate 100 .

[0150] In these optional embodiments, the isolation structure 200 includes a first layer 210 and a second layer 220 located on the side of the first layer 210 facing away from the base substrate 100. The first layer 210 and the second layer 220 are stacked to form the isolation structure 200. The orthographic projection of the first layer 210 arranged close to the base substrate 100 on the base substrate 100 is located within the orthographic projection of the second layer 220 on the base substrate 100. The area of ​​the second layer 220 is larger than the area of ​​the first layer 210. The second layer 220 covers the surface of the first layer 210 close to the second layer 220. At this time, the first layer 210 is recessed relative to the second layer 220 in a direction away from the isolation opening 240. When preparing the light-emitting layer 300, the light-emitting layer 300 has a large step at the edge of the isolation structure 200, and the first layer 210 is concave relative to the second layer 220. The light-emitting layer 300 is difficult to connect at the edge of the isolation structure 200, and thus breaks. The light-emitting layer 300 breaks to form light-emitting units 310 that are disconnected from each other, thereby reducing the crosstalk of carriers in the light-emitting layer 300 and improving the display effect of the display panel 10. In addition, the light-emitting unit 310 can be prepared without the use of a precision mask plate, which can reduce the development and use of precision masks and reduce preparation costs.

[0151] Optionally, the first layer 210 includes a conductive material, for example, the first layer 210 includes a non-metallic conductive material or a metallic conductive material.

[0152] In some optional embodiments, the second layer 220 includes a conductive material or an insulating material.

[0153] In these optional embodiments, the second layer 220 includes a conductive material, for example, a non-metallic conductive material or a metallic conductive material. When the second layer 220 is a non-metallic conductive material or an insulating material, the second layer 220 is difficult to etch during wet etching of the first layer 210 using an etching solution, thereby making it easier for the first layer 210 to be concave relative to the second layer 220.

[0154] In some optional embodiments, both the first layer 210 and the second layer 220 include metal materials, and the materials of the first layer 210 and the second layer 220 are different.

[0155] In these optional embodiments, when both the first layer 210 and the second layer 220 are made of metal materials, an etchant can be used to wet-etch the first layer 210. By configuring the etchant, the etching rate of the second layer 220 can be lower than the etching rate of the first layer 210. Since the etching rate of the first layer 210 is higher, even though the second layer 220 will be etched to some extent during wet etching with the etchant, the first layer 210 will be etched faster, thereby causing the first layer 210 to be recessed relative to the second layer 220.

[0156] See also Figure 12, Figure 12 FIG. 1 is a partial cross-sectional view of a display area of ​​a display panel in another embodiment.

[0157] like Figure 12 As shown, in some optional embodiments, the isolation structure 200 further includes a third layer 230 located on the side of the first layer 210 facing the base substrate 100 , and the orthographic projection of the first layer 210 on the base substrate 100 is located within the orthographic projection of the third layer 230 on the base substrate 100 .

[0158] In these optional embodiments, to obtain the concave first layer 210, the first layer 210 has a faster etching rate than the second layer 220 and the third layer 230 during the etching process, thereby forming the concave first layer 210. Due to the faster etching rate of the first layer 210, the etching waste generated is more likely to enter other locations of the display panel 10, thereby causing adverse effects. After the third layer 230 is provided, the first layer 210 can be well adhered to the third layer 230, and the generated etching waste falls on the third layer 230, making it easier to clean.

[0159] Optionally, the light emitting layer 300 includes an electron injection layer (EIL), an electron transport layer (ETL), a light emitting material layer, a hole injection layer (HIL) and a hole transport layer (HTL), but does not include structures such as the first electrode 410 and the second electrode 530 .

[0160] like Figures 1 to 12As shown, the second embodiment of the present application provides a display panel 10, the display panel 10 has a display area AA and a non-display area NA surrounding the display area AA, the non-display area NA includes a test area, and the display panel 10 also includes: a base substrate 100; a signal line layer 110, located on one side of the base substrate 100, the signal line layer 110 includes a first trace 111 located in the test area; a first inorganic layer 120, located on the side of the signal line layer 110 away from the base substrate 100; a first planarization layer 700, located on the side of the first inorganic layer 120 away from the base substrate 100; a second planarization layer 800, located between the first planarization layer 700 and the first inorganic layer 120; a second inorganic layer 130, located on the side of the first inorganic layer 120 away from the base substrate 100; a pixel definition layer 500, located on the side of the second inorganic layer 130 away from the base substrate 100, the first inorganic layer 120, the second inorganic layer 130 and the pixel definition layer 500 are stacked in the test area, at least partially. The orthographic projection of the first trace 111 on the substrate 100 is located within the orthographic projection of the pixel definition layer 500 on the substrate 100; the isolation structure 200 is located on one side of the substrate 100, and the isolation structure 200 encloses a plurality of isolation openings 240; the light-emitting layer 300 is located on one side of the substrate 100, and the light-emitting layer 300 includes a plurality of light-emitting units 310 at least partially located in the corresponding isolation openings 240; wherein, at least part of the orthographic projection of the first trace 111 on the substrate 100 is located within the orthographic projection of the first inorganic layer 120, the second inorganic layer 130 and the pixel definition layer 500 on the substrate 100, the first planarization layer 700 and the second planarization layer 800 between the pixel definition layer 500 and the second inorganic layer 130 are at least partially removed, and at least two adjacent ones of the first inorganic layer 120, the second inorganic layer 130 and the pixel definition layer 500 are made of the same material and are in contact at the partially removed portions of the first planarization layer 700 and the second planarization layer 800. For example, where the first planarization layer 700 and the second planarization layer 800 are partially removed, the first inorganic layer 120, the second inorganic layer 130 and the pixel definition layer 500 are stacked in sequence and are in contact with each other. Specifically, the first inorganic layer 120 is in contact with the second inorganic layer 130, and the second inorganic layer 130 is in contact with the pixel definition layer 500.

[0161] According to the display panel 10 of the embodiment of the present application, the display panel 10 includes a base substrate 100, a signal line layer 110, a first inorganic layer 120, a first planarization layer 700, a second planarization layer 800, a second inorganic layer 130, a pixel definition layer 500 and an isolation structure 200. When preparing the light-emitting layer 300, the light-emitting layer 300 has a large drop at the edge of the isolation structure 200, which is difficult to connect, and thus breaks. The light-emitting layer 300 breaks to form light-emitting units 310 that are disconnected from each other and located within the isolation opening 240. There is no need to use a precision mask plate, which can reduce the development and use of precision masks and reduce preparation costs. The pixel defining portion 510, the second inorganic layer 130 and the first inorganic layer 120 are stacked to form a covering protection for the first wiring 111, reducing the risk of breaking the first wiring 111 during the drop ball test. The materials of at least two adjacent ones of the first inorganic layer 120, the second inorganic layer 130 and the pixel definition layer 500 are the same, which can improve the adhesion between the first inorganic layer 120, the second inorganic layer 130 and the pixel definition layer 500, and improve the problem of film stress mismatch between the first inorganic layer 120, the second inorganic layer 130 and the pixel definition layer 500 due to the different materials of the first inorganic layer 120, the second inorganic layer 130 and the pixel definition layer 500, thereby improving the problem that the first wiring 111 is easily broken in the drop ball test due to the low adhesion between the first inorganic layer 120, the second inorganic layer 130 and the pixel definition layer 500, and the display abnormality of the display panel 10, thereby improving the performance reliability of the display panel 10.

[0162] In this embodiment, other structures can refer to the aforementioned related descriptions and will not be repeated here.

[0163] The structural design in this embodiment can be applied to other display panels 10 , and the specific selection can be made based on actual conditions. This application does not impose any specific restrictions on it.

[0164] The embodiments of the third aspect of the present application further provide a display device, comprising the display panel 10 of any of the above-mentioned embodiments, or the display panel 10 produced by the production method of any of the above-mentioned embodiments. Since the display device provided by the embodiments of the third aspect of the present application comprises the display panel 10 of any of the above-mentioned embodiments, or the display panel 10 produced by the production method of any of the above-mentioned embodiments, the display device provided by the embodiments of the third aspect of the present application has the beneficial effects of the display panel 10 of any of the above-mentioned embodiments, or the display panel 10 produced by the production method of any of the above-mentioned embodiments, which will not be further elaborated here.

[0165] The display device in the embodiments of the present application includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, consoles, and other devices with display functions.

[0166] While the embodiments described above are not exhaustive, they do not limit the invention to the specific embodiments described. Clearly, numerous modifications and variations are possible based on the above description. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better utilize the present invention and its modifications. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that: The display panel comprises a display area and a non-display area surrounding the display area, wherein the non-display area includes a test area. The display panel further comprises: substrate; A signal line layer is located on one side of the substrate, and the signal line layer includes a first trace located in the test area; a first inorganic layer, located on a side of the signal line layer facing away from the base substrate; a first planarization layer, located on a side of the first inorganic layer facing away from the base substrate; a second planarization layer, located between the first planarization layer and the first inorganic layer; a second inorganic layer, located on a side of the first inorganic layer facing away from the base substrate, the first inorganic layer and the second inorganic layer being stacked in the test area; In which, at least part of the first routing line has an orthographic projection on the base substrate located within the orthographic projection of the first inorganic layer and the second inorganic layer on the base substrate, in the non-display area, the first planarization layer and the second planarization layer between the first inorganic layer and the second inorganic layer are at least partially removed, the first inorganic layer and the second inorganic layer are made of the same material and are in contact at the partially removed portion of the first planarization layer and the second planarization layer, and the orthographic projection of the first routing line on the substrate is located outside the orthographic projection of the first planarization layer and the second planarization layer on the substrate.

2. The display panel according to claim 1, wherein: The display panel further includes: A pixel definition layer is located on the side of the second inorganic layer away from the base substrate. The pixel definition layer and the second inorganic layer are stacked in the non-display area, and at least part of the orthographic projection of the first trace on the base substrate is located within the orthographic projection of the pixel definition layer on the base substrate.

3. The display panel according to claim 2, wherein: The pixel definition layer and the second inorganic layer are made of the same material.

4. The display panel according to claim 2, wherein: The pixel definition layer has a first side surface away from the display area in a direction from the display area to the first wiring, and a first bottom surface facing the substrate and connected to the first side surface, and a first angle is formed between the first side surface and the first bottom surface, and the first angle is less than or equal to 30°.

5. The display panel according to claim 1, wherein: The second inorganic layer has a second side surface away from the display area in a direction along the display area toward the first wiring, and a second bottom surface facing the base substrate and connected to the second side surface. There is a second angle between the second side surface and the second bottom surface, and the second angle is less than or equal to 30°.

6. The display panel according to claim 1, wherein: The display panel further includes: The pixel definition layer is located on the side of the first inorganic layer in the display area away from the base substrate. The pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion. The pixel definition layer is in the same layer as the second inorganic layer.

7. The display panel according to claim 1, wherein: The first inorganic layer has a third side surface away from the display area in a direction pointing from the display area to the first wiring, and a third bottom surface facing the substrate and connected to the third side surface. There is a third angle between the third side surface and the third bottom surface, and the third angle is less than or equal to 30°.

8. The display panel according to claim 1, wherein: The display panel further includes: a first encapsulation layer, located on a side of the second inorganic layer facing away from the base substrate; a second packaging layer, located on a side of the first packaging layer facing away from the substrate; a third encapsulation layer, located on a side of the second encapsulation layer facing away from the substrate; The material of the first encapsulation layer includes an inorganic material; The material of the second encapsulation layer includes an organic material; The material of the third encapsulation layer includes an inorganic material.

9. The display panel according to claim 8, wherein: At least a portion of the orthographic projection of the first trace on the base substrate is located within the orthographic projection of the third packaging layer on the base substrate; The material of the third encapsulation layer is the same as that of the second inorganic layer.

10. The display panel according to claim 1, wherein The first planarization layer includes a first portion located in the non-display area, wherein the orthographic projection of the first portion on the base substrate is located on a side of the orthographic projection of the first trace on the base substrate away from the display area; The orthographic projection of the first portion on the base substrate is spaced apart from the orthographic projection of the second inorganic layer on the base substrate.

11. The display panel according to claim 10, wherein: The second planarization layer includes a second portion located in the non-display area, and an orthographic projection of the second portion on the base substrate is located within an orthographic projection of the first portion on the base substrate.

12. The display panel according to claim 11, wherein: The first portion has a first edge facing the display area, the second inorganic layer has a second edge away from the display area in a direction from the display area to the first wiring, the first edge and the second edge are separated by a first distance, and the first distance is 90 μm to 140 μm; The second portion has a third edge facing the display area, a distance between the first edge and the third edge is a second distance, and the second distance is 10 μm to 30 μm.

13. The display panel according to claim 1, wherein The non-display area includes a non-bending area and a bending area located on a side of the non-bending area away from the display area, and at least part of the first trace is located in the bending area; The orthographic projection of the first wiring located in the bending region on the base substrate is located within the orthographic projection of the first inorganic layer and the second inorganic layer on the base substrate.

14. The display panel according to claim 1, wherein The display panel further includes: An isolation structure is located on one side of the base substrate, and the isolation structure encloses a plurality of isolation openings; a light-emitting layer, located on one side of the base substrate, the light-emitting layer comprising a light-emitting unit at least partially located in the isolation opening; The first electrode layer is located on a side of the light-emitting layer away from the base substrate. The first electrode layer includes a plurality of first electrodes located in the plurality of isolation openings. The first electrodes are electrically connected to the isolation structure.

15. The display panel according to claim 14, wherein: The isolation structure includes a first layer and a second layer located on a side of the first layer facing away from the base substrate. The orthographic projection of the first layer on the base substrate is located within the orthographic projection of the second layer on the base substrate.

16. A display panel, characterized in that: The display panel comprises a display area and a non-display area surrounding the display area, wherein the non-display area includes a test area. The display panel further comprises: substrate; A signal line layer is located on one side of the substrate, and the signal line layer includes a first trace located in the test area; a first inorganic layer, located on a side of the signal line layer facing away from the base substrate; a first planarization layer, located on a side of the first inorganic layer facing away from the base substrate; a second planarization layer, located between the first planarization layer and the first inorganic layer; a second inorganic layer, located on a side of the first inorganic layer facing away from the base substrate; a pixel definition layer located on a side of the second inorganic layer facing away from the base substrate, the first inorganic layer, the second inorganic layer, and the pixel definition layer being stacked in the test area, and an orthographic projection of at least a portion of the first trace on the base substrate being located within the orthographic projection of the pixel definition layer on the base substrate; An isolation structure is located on one side of the base substrate, and the isolation structure encloses a plurality of isolation openings; A light-emitting layer is located on one side of the base substrate, and the light-emitting layer includes a plurality of light-emitting units that are at least partially located in the corresponding isolation openings; wherein, at least part of the first wiring is located on the base substrate within the orthographic projection of the first inorganic layer, the second inorganic layer and the pixel definition layer on the base substrate, and in the non-display area, the first planarization layer and the second planarization layer between the pixel definition layer and the second inorganic layer are at least partially removed, and at least two adjacent ones of the first inorganic layer, the second inorganic layer and the pixel definition layer are made of the same material and are in contact at the partially removed portion of the first planarization layer and the second planarization layer, and the orthographic projection of the first wiring on the substrate is located outside the orthographic projection of the first planarization layer and the second planarization layer on the substrate.

17. The display panel according to claim 16, wherein: The pixel definition layer has a first side surface away from the display area in a direction from the display area to the first wiring, and a first bottom surface facing the substrate and connected to the first side surface, and a first angle is formed between the first side surface and the first bottom surface, and the first angle is less than or equal to 30°.

18. The display panel according to claim 16, wherein: The second inorganic layer has a second side surface away from the display area in a direction along the display area toward the first wiring, and a second bottom surface facing the base substrate and connected to the second side surface. There is a second angle between the second side surface and the second bottom surface, and the second angle is less than or equal to 30°.

19. The display panel according to claim 16, wherein: The non-display area includes a non-bending area and a bending area located on a side of the non-bending area away from the display area, and at least part of the first trace is located in the bending area; The orthographic projection of the first wiring located in the bending region on the base substrate is located within the orthographic projection of the first inorganic layer and the second inorganic layer on the base substrate.

20. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 19.

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