Display panel, display device and preparation method of display panel

Abstract

This application discloses a display panel, a display device, and a method for fabricating the display panel. The display panel further includes a substrate, a dam, a pixel defining layer, a light-emitting layer, and a barrier layer. The pixel defining layer includes a pixel defining portion and a defining portion. The pixel defining portion is located in the display area to define the light-emitting area of ​​the display area, and the light-emitting unit is disposed within the pixel opening to achieve light emission display. The defining portion is disposed on the dam in the non-display area. The defining portion and the dam together form a barrier against the second encapsulation layer of organic materials, preventing the second encapsulation layer from overflowing to the side of the dam away from the display area. A barrier layer is also disposed on the pixel defining layer. At least a portion of the barrier layer is disposed on the dam and has grooves formed therein. The grooves are located on the side of the dam away from the substrate, increasing the overflow path and overflow difficulty of the second encapsulation layer, further improving the barrier effect of the second encapsulation layer on the organic materials, and improving the overflow of the second encapsulation layer of organic materials towards the side of the dam away from the display area.

Description

Technical Field

[0001] This application relates to the field of displays, specifically to a display panel, a display device, and a method for manufacturing the display panel. Background Technology

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diode (LED) technologies are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide application range, becoming the mainstream display devices. In the traditional display panel manufacturing process, a fine metal mask (FMM) is typically used to pattern the light-emitting pixels. FMM technology is mature and has extensive mass production experience. However, FMM technology also has problems such as limited precision, high development costs, and long development cycles. Fine metal mask-less technology eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance aspects, offering advantages such as high performance, full-size display, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe relevant content regarding the technology of eliminating fine metal masks, and are provided for reference.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the Invention

[0004] This application provides a display panel, a display device, and a method for manufacturing the display panel, aiming to improve the performance of OLED display products.

[0005] The first aspect of this application provides a display panel, which includes adjacent display areas and non-display areas. The display panel further includes: a substrate; a dam located on one side of the substrate and in the non-display area; a pixel definition layer located on one side of the substrate, the pixel definition layer including a pixel defining portion located in the display area and a definition portion located in the non-display area, the pixel defining portion enclosing to form a plurality of pixel openings, at least a portion of the definition portion being located on the side of the dam away from the substrate; a light-emitting layer located on one side of the substrate, the light-emitting layer including a plurality of light-emitting units at least partially located in the pixel openings; and a barrier layer located on the side of the pixel definition layer away from the substrate, the barrier layer having grooves formed thereon, at least a portion of the grooves being located within the orthographic projection of the dam onto the substrate.

[0006] According to an embodiment of the first aspect of this application, a dam has a plurality of grooves on the side facing away from the substrate.

[0007] According to any of the foregoing embodiments of the first aspect of this application, the plurality of grooves may have the same or different dimensions.

[0008] According to any of the foregoing embodiments of the first aspect of this application, a plurality of grooves are spaced apart along the direction from the display area to the non-display area.

[0009] According to any of the foregoing embodiments of the first aspect of this application, a plurality of grooves are evenly spaced.

[0010] According to any of the foregoing embodiments of the first aspect of this application, the orthographic projection of the groove on the substrate is annular.

[0011] According to any of the foregoing embodiments of the first aspect of this application, the groove includes a first groove and a second groove located on the side of the same dam away from the substrate. The first groove is located on the side of the second groove close to the display area. The dimension of the first groove along the direction from the display area to the non-display area is a first width, and the dimension of the second groove along the direction from the display area to the non-display area is a second width. The first width is greater than or equal to the second width.

[0012] According to any of the foregoing embodiments of the first aspect of this application, the barrier layer includes an isolation pillar, and a groove is formed on the periphery of the isolation pillar.

[0013] According to any of the foregoing embodiments of the first aspect of this application, a plurality of isolation columns are spaced apart along the direction from the display area to the non-display area.

[0014] According to any of the foregoing embodiments of the first aspect of this application, the plurality of isolation columns may be the same or different in size.

[0015] According to any of the foregoing embodiments of the first aspect of this application, the orthographic projection of the isolation pillar on the substrate is annular.

[0016] According to any of the foregoing embodiments of the first aspect of this application, the isolation pillar includes a first isolation pillar and a second isolation pillar located on the side of the same dam away from the substrate. The first isolation pillar is located on the side of the second isolation pillar close to the display area. The dimension of the first isolation pillar in the thickness direction of the display panel is a first height, and the dimension of the second isolation pillar in the thickness direction of the display panel is a second height. The first height is greater than or equal to the second height.

[0017] According to any of the foregoing embodiments of the first aspect of this application, the isolation pillar has a top surface and a bottom surface disposed opposite to each other in the thickness direction of the display panel, and the bottom surface is located within the orthogonal projection of the top surface on the substrate. Alternatively, the isolation pillar has a first portion and a second portion, the second portion is located on the side of the first portion away from the substrate, and the surface of the first portion away from the substrate is located within the orthogonal projection of the second portion near the substrate.

[0018] According to any of the foregoing embodiments of the first aspect of this application, the material of the barrier layer may be the same as or different from the material of the pixel definition layer.

[0019] According to any of the foregoing embodiments of the first aspect of this application, the material of the barrier layer includes inorganic materials.

[0020] According to any of the foregoing embodiments of the first aspect of this application, the material of the pixel definition layer includes at least one of silicon oxide, silicon nitride, and silicon oxynitride.

[0021] According to any of the foregoing embodiments of the first aspect of this application, the material of the pixel definition layer includes silicon nitride, and the material of the barrier layer includes silicon oxide.

[0022] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes: a first encapsulation layer located in the display area and on the side of the light-emitting layer away from the substrate.

[0023] According to any of the foregoing embodiments of the first aspect of this application, the first encapsulation layer includes a plurality of spaced encapsulation portions, which are used to encapsulate light-emitting units.

[0024] According to any of the foregoing embodiments of the first aspect of this application, the material of the first encapsulation layer includes inorganic materials.

[0025] According to any of the foregoing embodiments of the first aspect of this application, at least a portion of the encapsulation portion of the barrier layer and the first encapsulation layer is disposed in the same layer and made of the same material, or the material of the barrier layer and the material of the first encapsulation layer are different.

[0026] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes: a second encapsulation layer located on the side of the first encapsulation layer away from the substrate and on the side of the dam facing the display area; and a third encapsulation layer located on the side of the second encapsulation layer away from the substrate and extending to the side of the dam away from the display area.

[0027] According to any of the foregoing embodiments of the first aspect of this application, the material of the second encapsulation layer is an organic material.

[0028] According to any of the foregoing embodiments of the first aspect of this application, the material of the third encapsulation layer is an inorganic material.

[0029] According to any of the foregoing embodiments of the first aspect of this application, the dam has an upper surface facing away from the substrate, and at least a portion of the groove is located within the orthographic projection of the upper surface of the dam onto the substrate.

[0030] According to any of the foregoing embodiments of the first aspect of this application, a plurality of dams are spaced apart along the direction from the display area to the non-display area.

[0031] According to any of the foregoing embodiments of the first aspect of this application, a groove is provided on the side of the plurality of dams away from the substrate.

[0032] According to any of the foregoing embodiments of the first aspect of this application, the dam includes a first dam and a second dam, the first dam being located on the side of the second dam closer to the display area, and at least a portion of the groove being disposed on the side of the first dam away from the substrate.

[0033] According to any of the foregoing embodiments of the first aspect of this application, the dimension of the first dam in the thickness direction of the display panel is greater than or equal to the dimension of the second dam in the thickness direction of the display panel.

[0034] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes: an isolation structure located on the side of the pixel definition layer away from the substrate, the isolation structure enclosing an isolation opening, and the isolation opening and the pixel opening being connected.

[0035] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes: a first electrode located between the substrate and the light-emitting unit, at least a portion of the first electrode being exposed through a pixel opening.

[0036] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes: a second electrode layer located on the side of the light-emitting layer away from the substrate, the second electrode layer including a second electrode located in the isolation opening, the second electrode being electrically connected to the isolation structure.

[0037] According to any of the foregoing embodiments of the first aspect of this application, the orthogonal projection of the light-emitting unit onto the substrate is located within the orthogonal projection of the second electrode onto the substrate.

[0038] According to any of the foregoing embodiments of the first aspect of this application, the isolation structure includes a first layer and a second layer, wherein the second layer is located on the side of the first layer facing away from the substrate.

[0039] According to any of the foregoing embodiments of the first aspect of this application, the orthographic projection of the surface of the first layer away from the substrate onto the substrate is located within the orthographic projection of the surface of the second layer close to the substrate onto the substrate.

[0040] According to any of the foregoing embodiments of the first aspect of this application, the first layer includes a conductive material.

[0041] According to any of the foregoing embodiments of the first aspect of this application, the second layer includes a conductive material or an insulating material.

[0042] According to any of the foregoing embodiments of the first aspect of this application, the second layer includes a metallic material, and the materials of the first layer and the second layer are different.

[0043] According to any of the foregoing embodiments of the first aspect of this application, the isolation structure further includes a third layer located on the side of the first layer facing the substrate, wherein the orthographic projection of the surface of the first layer near the substrate onto the substrate is located within the orthographic projection of the surface of the third layer away from the substrate.

[0044] An embodiment of the second aspect of this application provides a display panel, which includes adjacent display areas and non-display areas. The display panel further includes: a substrate; a dam located on one side of the substrate and in the non-display area; a pixel defining layer located on one side of the substrate, the pixel defining layer including pixel defining portions located in the display area, the pixel defining portions enclosing to form a plurality of pixel openings; an isolation structure located on the side of the pixel defining layer away from the substrate, the isolation structure enclosing to form an isolation opening, the isolation opening and the pixel opening being connected; a light-emitting layer located on one side of the substrate, the light-emitting layer including a plurality of light-emitting units at least partially located in the pixel openings; and a barrier layer located on the side of the dam away from the substrate, the barrier layer including isolation pillars, at least a portion of the isolation pillars having their orthographic projection on the substrate located within the orthographic projection of the dam on the substrate.

[0045] According to an embodiment of the second aspect of this application, a groove is formed on the barrier layer, and at least a portion of the groove is located within the orthogonal projection of the dam onto the substrate.

[0046] According to any of the foregoing embodiments of the second aspect of this application, a dam has a plurality of grooves on the side away from the substrate.

[0047] According to any of the foregoing embodiments of the second aspect of this application, the plurality of grooves may have the same or different dimensions.

[0048] According to any of the foregoing embodiments of the second aspect of this application, a plurality of grooves are spaced apart along the direction from the display area to the non-display area.

[0049] According to any of the foregoing embodiments of the second aspect of this application, a plurality of grooves are evenly spaced.

[0050] According to any of the foregoing embodiments of the second aspect of this application, the orthographic projection of the groove on the substrate is annular.

[0051] According to any of the foregoing embodiments of the second aspect of this application, a plurality of isolation columns are spaced apart along the direction from the display area to the non-display area.

[0052] According to any of the foregoing embodiments of the second aspect of this application, the plurality of isolation columns may be the same or different in size.

[0053] According to any of the foregoing embodiments of the second aspect of this application, the orthographic projection of the isolation pillar on the substrate is annular.

[0054] According to any of the foregoing embodiments of the second aspect of this application, the pixel definition layer further includes a definition portion located in the non-display area, at least a portion of which is located on the side of the dam away from the substrate.

[0055] According to any of the foregoing embodiments of the second aspect of this application, the isolation column is located on the defining portion.

[0056] According to any of the foregoing embodiments of the second aspect of this application, a plurality of dams are spaced apart along the direction from the display area to the non-display area.

[0057] According to any of the foregoing embodiments of the second aspect of this application, isolation columns are provided on the side of the plurality of dams away from the substrate.

[0058] An embodiment of the third aspect of this application provides a display device that includes a display panel of any of the above embodiments.

[0059] An embodiment of the fourth aspect of this application provides a method for manufacturing a display panel, the display panel including adjacent display areas and non-display areas, the method comprising:

[0060] A dam is fabricated on a substrate, and the dam is located in a non-display area;

[0061] A pixel definition layer is prepared on a substrate. The pixel definition layer includes a pixel defining portion located in the display area and a definition portion located in the non-display area. The pixel defining portion surrounds and forms a plurality of pixel openings. At least a portion of the definition portion is located on the side of the dam away from the substrate.

[0062] A light-emitting layer is fabricated on a substrate, the light-emitting layer comprising a plurality of light-emitting units at least partially located in pixel openings;

[0063] A barrier layer is prepared on the side of the pixel definition layer away from the substrate. A groove is formed on the barrier layer, and at least part of the groove is located within the orthogonal projection of the substrate.

[0064] According to an embodiment of this application, the display panel includes a display area and a non-display area. The display area is used to realize the light-emitting display of the display panel, and the non-display area is used to house photosensitive components. The display panel also includes a substrate, a dam, a pixel definition layer, a light-emitting layer, and a barrier layer. The pixel definition layer includes a pixel defining portion and a defining portion. The pixel defining portion is located in the display area to define the light-emitting area of ​​the display area, and the light-emitting unit is disposed within the pixel opening to realize the light-emitting display. The defining portion is disposed on the dam in the non-display area. The defining portion and the dam together form a barrier to the second encapsulation layer of organic materials, preventing the second encapsulation layer from overflowing to the side of the dam away from the display area. A barrier layer is also disposed on the pixel definition layer. At least a portion of the barrier layer is disposed on the dam and has a groove. The groove is disposed on the side of the dam away from the substrate, increasing the overflow path and overflow difficulty of the second encapsulation layer, further improving the barrier effect of the second encapsulation layer of organic materials, and improving the overflow of the second encapsulation layer of organic materials toward the side of the dam away from the display area, thereby improving the performance of the OLED display panel. Attached Figure Description

[0065] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0066] Figure 1 This is a top view schematic diagram of a display panel provided in an embodiment of this application;

[0067] Figure 2 yes Figure 1 Sectional view at point AA;

[0068] Figure 3 yes Figure 1 A cross-sectional view of another embodiment at point AA;

[0069] Figure 4 yes Figure 1 A cross-sectional view of another embodiment at point AA;

[0070] Figure 5 yes Figure 1 A cross-sectional view of another embodiment at point AA;

[0071] Figure 6 yes Figure 1 A cross-sectional view of an embodiment is also shown at point AA;

[0072] Figure 7 yes Figure 1 A cross-sectional view of an embodiment is also shown at point AA;

[0073] Figure 8 yes Figure 6 A magnified view of a portion of the image;

[0074] Figure 9 This is another embodiment Figure 6 A magnified view of a portion of the image;

[0075] Figure 10 yes Figure 1 A cross-sectional view of an embodiment is also shown at point AA;

[0076] Figure 11 yes Figure 1 A cross-sectional view of an embodiment is also shown at point AA;

[0077] Figure 12 yes Figure 1 A cross-sectional view of an embodiment is also shown at point AA;

[0078] Figure 13 This is a partial cross-sectional view of the display area of ​​a display panel provided in an embodiment of this application;

[0079] Figure 14 This is a partial cross-sectional view of a display panel provided in another embodiment.

[0080] Figure 15 This is a schematic flowchart of a method for manufacturing a display panel provided in an embodiment of this application;

[0081] Figures 16 to 19 This is a process diagram of the fabrication of a display panel provided in an embodiment of this application.

[0082] Explanation of reference numerals in the attached figures:

[0083] 10. Display panel; AA, display area; NA, non-display area;

[0084] 100. Substrate;

[0085] 200. Dike; 210. First dike; 220. Second dike;

[0086] 300, Pixel definition layer; 310, Pixel limiting part; 320, Pixel opening; 330, Definition part; 340, First electrode;

[0087] 400, Light-emitting layer; 410, Light-emitting unit;

[0088] 500, Barrier layer; 510, Groove; 511, First groove; 512, Second groove; 520, Isolation post; 521, First isolation post; 522, Second isolation post; 523, Top surface; 524, Bottom surface; 525, First section; 526, Second section;

[0089] 600, Second electrode layer; 610, Second electrode;

[0090] 710, First encapsulation layer; 711, Encapsulation unit; 720, Second encapsulation layer; 730, Third encapsulation layer;

[0091] 800. Isolation structure; 810. First layer; 820. Second layer; 830. Third layer; 840. Isolation opening;

[0092] D1, first width; D2, second width; H1, first height; H2, second height. Detailed Implementation

[0093] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0094] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0095] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0096] This application provides a display panel, a display device, and a method for manufacturing the display panel. The following description, in conjunction with the accompanying drawings, will illustrate various embodiments of the display panel, the display device, and the method for manufacturing the display panel.

[0097] This application provides a display panel, which may be an organic light-emitting diode (OLED) display panel.

[0098] Please refer to the following: Figure 1 and Figure 2 , Figure 1 This is a top view schematic diagram of a display panel provided in an embodiment of this application; Figure 2 yes Figure 1 Sectional view at point AA.

[0099] like Figure 1 and Figure 2 As shown, a first aspect embodiment of this application provides a display panel 10, which includes adjacent display areas AA and non-display areas NA. The display panel 10 further includes: a substrate 100; a dam 200 located on one side of the substrate 100 and in the non-display area NA; a pixel definition layer 300 located on one side of the substrate 100, the pixel definition layer 300 including a pixel limiting portion 310 located in the display area AA and a definition portion 330 located in the non-display area NA, the pixel limiting portion 310 enclosing to form a plurality of pixel openings 320, at least a portion of the definition portion 330 being located on the side of the dam 200 away from the substrate 100; a light-emitting layer 400 located on one side of the substrate 100, the light-emitting layer 400 including a plurality of light-emitting units 410 at least partially located in the pixel openings 320; and a barrier layer 500 located on the side of the pixel definition layer 300 away from the substrate 100, the barrier layer 500 having a groove 510, at least a portion of the groove 510 being located within the orthographic projection of the dam 200 onto the substrate 100.

[0100] According to an embodiment of this application, the display panel 10 includes a display area AA and a non-display area NA. The display area AA is used to realize the light emission display of the display panel 10, and the non-display area NA is used to house photosensitive components. The display panel 10 also includes a substrate 100, a dam 200, a pixel definition layer 300, a light-emitting layer 400, and a barrier layer 500. The pixel definition layer 300 includes a pixel defining portion 310 and a defining portion 330. The pixel defining portion 310 is located in the display area AA to define the light-emitting area of ​​the display area AA, and the light-emitting unit 410 is disposed in the pixel opening 320 to realize the light emission display. The defining portion 330 is disposed on the dam 200 of the non-display area NA. The defining portion 330 and the dam 200 together form a barrier against the second encapsulation layer 720 of the organic material, preventing the second encapsulation layer 720 from overflowing to the side of the dam 200 away from the display area AA. A barrier layer 500 is also provided on the pixel definition layer 300. At least a portion of the barrier layer 500 is provided on the dam 200 and has a groove 510. The groove 510 is provided on the side of the dam 200 away from the substrate 100, which increases the overflow path and overflow difficulty of the second encapsulation layer 720, further improves the barrier effect of the second encapsulation layer 720 on organic materials, and improves the overflow of the second encapsulation layer 720 on the side of the dam 200 away from the display area AA, thereby improving the performance of the OLED display panel 10.

[0101] Furthermore, the groove 510 on the barrier layer 500 can increase the path of water and oxygen intrusion and improve the barrier ability against water and oxygen, making it difficult for water and oxygen in the non-display area NA to intrude into the display area AA through the barrier layer 500.

[0102] There are several ways to set up the non-display area NA. For example, the non-display area NA can be a light-transmitting area, with the display area AA surrounding it. The non-display area NA is used to allow ambient light to pass through so that the photosensitive element can obtain ambient light information. For example, an under-display camera module can be set up in the non-display area NA. Alternatively, the non-display area NA can be the bezel area of ​​the display panel 10, with the bezel area surrounding the display area AA.

[0103] There are several other ways to configure the substrate 100. For example, the substrate 100 may include a substrate and an array substrate disposed on the substrate. The array substrate includes multiple metal layers and an insulating layer that is at least partially located in the display area AA. Alternatively, the substrate 100 may be the substrate itself. Or the substrate 100 may include a buffer layer and a support plate on the side facing away from the substrate.

[0104] Optionally, the material of the dam 200 may include organic materials. Optionally, the display panel 10 may also include a planarization layer located between the substrate 100 and the pixel definition layer 300, and the dam 200 and the planarization layer may be fabricated simultaneously.

[0105] Please see Figure 3 and Figure 4 , Figure 3 yes Figure 1 A cross-sectional view of another embodiment at point AA; Figure 4 yes Figure 1 A cross-sectional view of another embodiment at point AA.

[0106] like Figure 3 and Figure 4 As shown, in some optional embodiments, a dam 200 has a plurality of grooves 510 on the side opposite to the substrate 100.

[0107] In these optional embodiments, multiple grooves 510 are provided on the side of the same dam 200 away from the substrate 100 to further increase the overflow path and overflow difficulty of the second encapsulation layer 720, improve the barrier effect of the second encapsulation layer 720 on organic materials, and improve the overflow of the second encapsulation layer 720 on the side of the dam 200 away from the display area AA, thereby improving the performance of the OLED display panel 10.

[0108] Optionally, the multiple recesses 510 may have the same or different dimensions. For example, at least two recesses 510 may have the same or different dimensions in the direction from the display area AA to the non-display area NA, or at least two recesses 510 may have the same or different dimensions in the thickness direction.

[0109] Optionally, multiple grooves 510 are spaced apart along the direction from the display area AA to the non-display area NA to increase the overflow path of the second encapsulation layer 720 in the direction from the display area AA to the side of the dam 200 away from the display area AA, thereby improving the barrier effect of the barrier layer 500 on the second encapsulation layer 720 of organic materials.

[0110] Optionally, the multiple grooves 510 are evenly spaced. Alternatively, the multiple grooves 510 are of the same size and are evenly spaced.

[0111] Optionally, the orthographic projection of the groove 510 on the substrate 100 is annular, and the annular groove 510 has a large barrier range, further improving the barrier effect on the second encapsulation layer 720 of organic materials.

[0112] Please see Figure 5 , Figure 5 yes Figure 1 A cross-sectional view of another embodiment at point AA.

[0113] like Figure 5As shown, in some optional embodiments, the groove 510 includes a first groove 511 and a second groove 512 located on the side of the same dam 200 away from the substrate 100. The first groove 511 is located on the side of the second groove 512 close to the display area AA. The first groove 511 has a first width D1 along the direction from the display area AA to the non-display area NA, and the second groove 512 has a second width D2 along the direction from the display area AA to the non-display area NA. The first width D1 is greater than or equal to the second width D2.

[0114] In these optional embodiments, the first width D1 of the first groove 511 closer to the display area AA is greater than the second width D2 of the second groove 512, that is, the overflow path formed by the first groove 511 is greater than the overflow path formed by the second groove 512, so that the first groove 511 closer to the display area AA has a better blocking effect on the second encapsulation layer 720, further improving the blocking effect of the barrier layer 500 on the second encapsulation layer 720 of organic materials, and improving the overflow of the second encapsulation layer 720 of organic materials toward the side of the dam 200 away from the display area AA.

[0115] like Figure 3 and Figure 4 As shown, the groove 510 can optionally be a blind groove or a through groove.

[0116] Please see Figure 6 , Figure 6 yes Figure 1 A cross-sectional view of an embodiment is also shown at point AA.

[0117] like Figure 6 As shown, in some alternative embodiments, the barrier layer 500 includes an isolation post 520, with a groove 510 formed around the isolation post 520.

[0118] In these alternative embodiments, when the second encapsulation layer 720 flows into the groove 510, the isolation pillars 520 of the barrier layer 500 can block the second encapsulation layer 720 in the groove 510, that is, the isolation pillars 520 of the barrier layer 500 can prevent the second encapsulation layer 720 from overflowing toward the side of the dam 200 away from the display area AA.

[0119] Optionally, multiple isolation pillars 520 are spaced apart along the direction from the display area AA to the non-display area NA. The multiple isolation pillars 520 can further increase the blocking ability of the second encapsulation layer 720 and improve the overflow of the organic material second encapsulation layer 720 toward the side of the dam 200 away from the display area AA.

[0120] Optionally, the multiple isolation pillars 520 may have the same or different dimensions. For example, at least two isolation pillars 520 may have the same or different dimensions in the direction from the display area AA to the non-display area NA, or at least two isolation pillars 520 may have the same or different dimensions in the thickness direction.

[0121] Optionally, the orthographic projection of the isolation pillar 520 on the substrate 100 is annular, and the annular isolation pillar 520 has a large barrier range, further improving the barrier effect on the second encapsulation layer 720 of organic materials.

[0122] Optionally, multiple isolation columns 520 are evenly spaced. Alternatively, multiple isolation columns 520 are of the same size and evenly spaced.

[0123] Please see Figure 7 , Figure 7 yes Figure 1 A cross-sectional view of an embodiment is also shown at point AA.

[0124] like Figure 7 As shown, in some optional embodiments, the isolation pillar 520 includes a first isolation pillar 521 and a second isolation pillar 522 located on the side of the same dam 200 away from the substrate 100. The first isolation pillar 521 is located on the side of the second isolation pillar 522 close to the display area AA. The dimension of the first isolation pillar 521 in the thickness direction of the display panel 10 is a first height H1, and the dimension of the second isolation pillar 522 in the thickness direction is a second height H2. The first height H1 is greater than or equal to the second height H2.

[0125] In these alternative embodiments, the first height H1 of the first isolation post 521, which is closer to the display area AA, is greater than the second height H2 of the second isolation post 522. That is, the blocking effect of the first isolation post 521 on the second encapsulation layer 720 is better than that of the second isolation post 522 on the second encapsulation layer 720. This makes the blocking effect of the first isolation post 521, which is closer to the display area AA, better prevent the second encapsulation layer 720 from overflowing toward the side of the dam 200 away from the display area AA.

[0126] Please see Figures 7 to 9 , Figure 8 yes Figure 6 A magnified view of a portion of the image; Figure 9 This is another embodiment Figure 6 A magnified view of a portion of the image.

[0127] like Figures 7 to 9As shown, in some optional embodiments, the isolation pillar 520 has a top surface 523 and a bottom surface 524 disposed opposite to each other in the thickness direction of the display panel 10. The bottom surface 524 is located within the orthographic projection of the top surface 523 onto the orthographic projection of the substrate 100. Alternatively, the isolation pillar 520 has a first portion 525 and a second portion 526. The second portion 526 is located on the side of the first portion 525 away from the substrate 100. The surface of the first portion 525 away from the substrate 100 is located within the orthographic projection of the substrate 100 on the surface of the second portion 526 near the substrate 100.

[0128] In these optional embodiments, the isolation pillar 520 has a top surface 523 and a bottom surface 524 disposed opposite to each other in the thickness direction of the display panel 10. The orthographic projection of the bottom surface 524 onto the substrate 100 is located within the orthographic projection of the bottom surface 524 onto the substrate 100. For example, the cross-section of the isolation pillar 520 is an inverted trapezoid or a rectangle. When the cross-section of the isolation pillar 520 is an inverted trapezoid or a rectangle, the second encapsulation layer 720 is difficult to climb up the top surface 523 from the side wall of the isolation pillar 520, thereby overflowing to the side of the dam 200 away from the display area AA, improving the blocking effect of the isolation pillar 520 on the second encapsulation layer 720. The surface of the first portion 525 facing away from the substrate 100 is projected onto the substrate 100. The surface of the second portion 526 near the substrate 100 is within the projection of the substrate 100. That is, the sidewall of the first portion 525 is recessed relative to the sidewall of the second portion 526, so that the sidewall of the isolation pillar 520 has a certain recessed space. When the second encapsulation layer 720 overflows to one side of the isolation pillar 520, it will fill the recessed space, so that it can overflow through the second portion 526 away from the surface of the substrate 100 and toward the side of the dam 200 away from the display area AA. That is, it can further improve the barrier capability of the isolation pillar 520 to the second encapsulation layer 720 and improve the overflow of the second encapsulation layer 720 toward the side of the dam 200 away from the display area AA.

[0129] Optionally, the cross-section of the isolation column 520 is a regular trapezoid.

[0130] Optionally, multiple grooves 510 are of the same size and evenly spaced, and multiple isolation posts 520 are of the same size and evenly spaced.

[0131] In some alternative embodiments, the material of the barrier layer 500 may be the same as or different from the material of the pixel definition layer 300.

[0132] In these optional embodiments, when the material of the barrier layer 500 is the same as that of the pixel definition layer 300, the barrier layer 500 and the pixel definition layer 300 can be fabricated using the same process, simplifying the fabrication process. When the materials of the barrier layer 500 and the pixel definition layer 300 are different, when the barrier layer 500 is patterned to form the groove 510, the etching material used to etch the barrier layer 500 is unlikely to etch the pixel definition layer 300 due to the different materials of the barrier layer 500 and the pixel definition layer 300. This avoids the problem of over-etching of the pixel definition layer 300 due to etching of the barrier layer 500, resulting in etching damage to the pixel definition layer 300, and moisture invading the display area AA through the damaged location on the side of the pixel definition layer 300 near the substrate 100.

[0133] Optionally, the barrier layer 500 may be made of inorganic materials. The inorganic material barrier layer 500 has a good barrier effect on the organic material second encapsulation layer 720, and also has a good barrier effect on water and oxygen.

[0134] Optionally, the material of the pixel definition layer 300 may include inorganic materials.

[0135] Optionally, the material of the pixel definition layer 300 includes at least one of silicon oxide, silicon nitride, and silicon oxynitride.

[0136] Optionally, the pixel definition layer 300 may be made of silicon nitride, and the barrier layer 500 may be made of silicon oxide.

[0137] Optionally, the barrier layer 500 may also include a cover portion located in the display area AA, the cover portion being disposed on the side of the pixel defining portion 310 facing away from the substrate 100. For example, the cover portion covers part or all of the surface of the pixel defining portion 310 facing away from the substrate 100.

[0138] Optionally, the display panel 10 further includes a first encapsulation layer 710 located in the display area AA. The first encapsulation layer 710 includes a plurality of spaced encapsulation portions 711, which are used to encapsulate the light-emitting unit 410 to reduce the intrusion of water and oxygen into the light-emitting unit 410 and improve the service life of the light-emitting unit 410.

[0139] Optionally, the material of the first encapsulation layer 710 may include inorganic materials. Inorganic materials have good density and good barrier properties against water vapor and oxygen.

[0140] Optionally, the first encapsulation layer 710 is located in the display area AA, for example, the first encapsulation layer 710 terminates on the side of the isolation structure 800 near the non-display area NA that is away from the substrate 100.

[0141] In some alternative embodiments, at least a portion of the encapsulation portion 711 of the barrier layer 500 and the first encapsulation layer 710 are disposed in the same layer and made of the same material, or the material of the barrier layer 500 and the first encapsulation layer 710 are different.

[0142] In these optional embodiments, the barrier layer 500 and the first encapsulation layer 710 are disposed in the same layer, that is, the barrier layer 500 and the first encapsulation layer 710 are made of the same material and are in the same layer. The barrier layer 500 can be prepared simultaneously with the first encapsulation layer 710, simplifying the preparation process. Alternatively, the barrier layer 500 may be made of a different material than the first encapsulation layer 710, and the barrier layer 500 and the first encapsulation layer 710 may be prepared in separate steps.

[0143] In some alternative embodiments, the display panel 10 further includes: a second encapsulation layer 720 located on the side of the first encapsulation layer 710 away from the substrate 100 and on the side of the dam 200 facing the display area AA; and a third encapsulation layer 730 located on the side of the second encapsulation layer 720 away from the substrate 100 and extending to the side of the dam 200 away from the display area AA.

[0144] In these alternative embodiments, the second encapsulation layer 720 is blocked by the dam 200 and the barrier layer 500 on the side of the dam 200 facing the display area AA, thereby preventing the second encapsulation layer 720 from overflowing to the side of the dam 200 away from the display area AA.

[0145] Optionally, the material of the second encapsulation layer 720 is an organic material.

[0146] Optionally, the third encapsulation layer 730 is made of an inorganic material. The first encapsulation layer 710, the second encapsulation layer 720, and the third encapsulation layer 730 are encapsulated using inorganic, organic, and inorganic materials, respectively, to form a TFE (Thin Film Encapsulation) encapsulation structure, further improving encapsulation performance.

[0147] In some alternative embodiments, the dam 200 has an upper surface facing away from the substrate 100, and at least a portion of the groove 510 is located within the orthographic projection of the substrate 100 on the upper surface of the dam 200.

[0148] In these alternative embodiments, the groove 510 of the barrier layer 500 is provided on the upper surface of the dam 200. On the one hand, it can ensure that the groove 510 of the barrier layer 500 prevents the second encapsulation layer 720 from overflowing toward the side of the dam 200 away from the display area AA. On the other hand, it facilitates the patterning of the barrier layer 500 to form the groove 510.

[0149] Optionally, the groove 510 can also be provided on the side wall of the dam 200 facing the display area AA or away from the display area AA.

[0150] Optionally, the isolation column 520 is disposed on the upper surface of the dam 200, or the isolation column 520 is disposed on the side wall of the dam 200 facing the display area AA or away from the display area AA.

[0151] Please see Figure 10 and Figure 11 , Figure 10 yes Figure 1 A cross-sectional view of an embodiment is also shown at point AA; Figure 11 yes Figure 1 A cross-sectional view of an embodiment is also shown at point AA.

[0152] like Figure 10 and Figure 11 As shown, optionally, multiple dams 200 are spaced apart along the direction from the display area AA to the non-display area NA. Multiple dams 200 can further increase the overflow path and overflow difficulty of the second encapsulation layer 720, further improve the blocking effect of the second encapsulation layer 720 of organic materials, and improve the overflow of the second encapsulation layer 720 of organic materials toward the side of the dam 200 away from the display area AA, thereby improving the performance of the OLED display panel 10.

[0153] like Figure 11 As shown, in some optional embodiments, a groove 510 is provided on the side of the plurality of dams 200 away from the substrate 100.

[0154] In these alternative embodiments, grooves 510 are provided on multiple dams 200 to improve the barrier capability of the multiple dams 200 to the second encapsulation layer 720, and further improve the overflow of the second encapsulation layer 720 of organic material toward the side of the dam 200 away from the display area AA.

[0155] Optionally, some or all of the multiple dams 200 may have a groove 510 on the side facing away from the base plate 100.

[0156] like Figure 10 and Figure 11 As shown, in some optional embodiments, the dam 200 includes a first dam 210 and a second dam 220, the first dam 210 being located on the side of the second dam 220 closer to the display area AA, and at least a portion of the groove 510 being disposed on the side of the first dam 210 away from the substrate 100.

[0157] In these alternative embodiments, at least on the first dam 210 closer to the display area AA, a barrier layer 500 with a groove 510 is provided, so that the barrier effect of the first dam 210 closer to the display area AA on the second encapsulation layer 720 of the organic material is better, and the overflow prevention effect of the second encapsulation layer 720 of the organic material is further improved.

[0158] In some alternative embodiments, the dimension of the first dam 210 in the thickness direction of the display panel 10 is greater than or equal to the dimension of the second dam 220 in the thickness direction of the display panel 10.

[0159] In these alternative embodiments, the first dam 210 closer to the display area AA has a larger dimension in the thickness direction, so that the location of the first dam 210 closer to the display area AA has a better barrier effect on the second encapsulation layer 720 of the organic material, and further improves the anti-overflow effect of the second encapsulation layer 720 of the organic material.

[0160] Please see Figure 12 and Figure 13 , Figure 12 yes Figure 1 A cross-sectional view of an embodiment is also shown at point AA; Figure 13 This is a partial cross-sectional view of the display area of ​​a display panel provided in an embodiment of this application.

[0161] like Figure 12 and Figure 13 As shown, in some optional embodiments, the display panel 10 further includes: an isolation structure 800 located on the side of the pixel definition layer 300 away from the substrate 100, the isolation structure 800 enclosing an isolation opening 840, the isolation opening 840 and the pixel opening 320 being connected.

[0162] In these optional embodiments, the isolation structure 800 is disposed on the substrate 100 and surrounds a plurality of isolation openings 840 to isolate the light-emitting layer 400 to form mutually disconnected light-emitting units 410, thereby reducing crosstalk of charge carriers in the light-emitting layer 400, improving the display effect of the display panel 10, and the fabrication of the light-emitting unit 410 does not require the use of a precision mask, which can reduce the development and use of precision masks and reduce the fabrication cost.

[0163] Optionally, the display panel 10 further includes: a first electrode 340 located between the substrate 100 and the light-emitting unit 410, at least a portion of the first electrode 340 being exposed through the pixel opening 320, the first electrode 340 contacting the light-emitting unit 410 to serve as an electrode of the light-emitting unit 410 and drive the light-emitting unit 410 to emit light.

[0164] In some optional embodiments, the display panel 10 further includes a second electrode layer 600 located on the side of the light-emitting layer 400 away from the substrate 100, the second electrode layer 600 including a second electrode 610 located in the isolation opening 840, the second electrode 610 being electrically connected to the isolation structure 800.

[0165] In these optional embodiments, multiple second electrodes 610 are interconnected via an isolation structure 800 to form a full-surface electrode, serving as electrodes of the light-emitting unit 410 and driving the light-emitting unit 410 to emit light. One of the first electrode 340 and the second electrode 610 serves as the anode of the light-emitting unit 410, and the other serves as the cathode of the light-emitting unit 410. This application embodiment illustrates this by using the second electrode 610 as the cathode of the light-emitting unit 410 and the first electrode 340 as the anode of the light-emitting unit 410.

[0166] In some alternative embodiments, the orthographic projection of each light-emitting unit 410 onto the substrate 100 lies within the orthographic projection of each second electrode 610 onto the substrate 100.

[0167] In these optional embodiments, the orthographic projection of the light-emitting unit 410 onto the substrate 100 is located within the orthographic projection of the second electrode 610 onto the substrate 100. That is, the second electrode 610 is disposed covering the light-emitting unit 410 to serve as the electrode of the light-emitting unit 410, thereby ensuring the normal light emission of the light-emitting unit 410 and improving the display effect of the display panel 10.

[0168] Optionally, the light-emitting unit 410 and the isolation structure 800 are spaced apart, that is, each light-emitting unit 410 is spaced apart from the others, which reduces crosstalk of charge carriers between each light-emitting unit 410 and improves the color crosstalk problem of the light-emitting unit 410.

[0169] In some alternative embodiments, the isolation structure 800 includes a first layer 810 and a second layer 820 located on the side of the first layer 810 away from the substrate 100, wherein the surface of the first layer 810 away from the substrate 100 is within the orthographic projection of the substrate 100, and the surface of the second layer 820 near the substrate 100 is within the orthographic projection of the substrate 100.

[0170] In these optional embodiments, the first layer 810 and the second layer 820 are stacked to form an isolation structure 800. The side of the first layer 810 located near the substrate 100 that is away from the substrate 100 has its orthographic projection on the substrate 100 within the orthographic projection of the second layer 820 on the substrate 100. The orthographic projection area of ​​the second layer 820 is larger than the orthographic projection area of ​​the side of the first layer 810 that is away from the substrate 100. The second layer 820 covers the surface of the first layer 810 that is close to the substrate 100. At this time, the first layer 810 is recessed relative to the second layer 820 in a direction away from the second isolation opening 840 and the first isolation opening 840. When the light-emitting layer 400 is fabricated, the light-emitting layer 400 has a large drop at the edge of the isolation structure 800, and the first layer 810 is recessed relative to the second layer 820. The light-emitting layer 400 is difficult to connect at the edge of the isolation structure 800, resulting in breakage. The breakage of the light-emitting layer 400 forms mutually disconnected light-emitting units 410. All embodiments of this application do not require the isolation structure 800 to be an inverted trapezoidal structure or a two-layer structure; any structure that can achieve the isolation effect of the light-emitting layer 400 is acceptable.

[0171] Optionally, the first layer 810 includes a conductive material, such as a non-metallic conductive material or a metallic conductive material, to achieve an electrical connection between the isolation structure 800 and the second electrode 610.

[0172] In some alternative embodiments, the second layer 820 includes a conductive material or an insulating material, wherein the insulating material may be at least one of silicon nitride or silicon oxide.

[0173] In these alternative embodiments, the second layer 820 includes a conductive material, such as a non-metallic conductive material or a metallic conductive material. When the second layer 820 is a non-metallic conductive material or an insulating material, it is difficult to etch the second layer 820 during the wet etching process of the first layer 810 using an etching solution, thereby making it easier for the first layer 810 to be recessed relative to the second layer 820.

[0174] In some alternative embodiments, the first layer 810 and the second layer 820 comprise metallic materials, and the materials of the first layer 810 and the second layer 820 are different.

[0175] In these optional embodiments, when both the first layer 810 and the second layer 820 are metallic materials, the first layer 810 can be wet-etched using an etching solution. By adjusting the etching solution, the etching rate of the second layer 820 can be made lower than that of the first layer 810. Because the etching rate of the first layer 810 is higher, even if the second layer 820 is etched to some extent during wet etching, the first layer 810 is etched faster, resulting in the first layer 810 being recessed relative to the second layer 820.

[0176] Please see Figure 14 , Figure 14 This is a partial cross-sectional view of the display panel in another embodiment.

[0177] like Figure 14 As shown, in some optional embodiments, the isolation structure 800 further includes a third layer 830 located on the side of the first layer 810 facing the substrate 100, wherein the orthographic projection of the first layer 810 onto the substrate 100 lies within the orthographic projection of the third layer 830 onto the substrate 100.

[0178] In these alternative embodiments, the large amount of waste material generated during the etching of the first layer 810 can easily enter other parts of the display panel 10, causing adverse effects. With the third layer 830, the first layer 810 can adhere better to the third layer 830, and the generated etching waste material falls onto the third layer 830, making it easier to clean.

[0179] Optionally, the second layer 820 is made of titanium (Ti) or molybdenum (Mo), the first layer 810 is made of aluminum (Al), silver (Ag), or copper (Cu), and the third layer 830 is made of titanium (Ti) or molybdenum (Mo). For example, the isolation structure 800 is a Ti / Al / Ti (titanium / aluminum / titanium) or Ti / Al / Mo (titanium / aluminum / molybdenum) three-layer metal composite material.

[0180] Optionally, the light-emitting layer 400 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).

[0181] like Figures 12 to 14 As shown, an embodiment of the second aspect of this application provides a display panel 10, which includes adjacent display areas AA and non-display areas NA. The display panel 10 further includes: a substrate 100; a dam 200 located on one side of the substrate 100 and in the non-display area NA; a pixel definition layer 300 located on one side of the substrate 100, the pixel definition layer 300 including a pixel defining portion 310 located in the display area AA, the pixel defining portion 310 enclosing and forming a plurality of pixel openings 320; and an isolation structure 800 located on the back of the pixel definition layer 300. On the side away from the substrate 100, the isolation structure 800 encloses and forms an isolation opening 840, which is connected to the pixel opening 320; the light-emitting layer 400 is located on one side of the substrate 100, and the light-emitting layer 400 includes a plurality of light-emitting units 410 at least partially located in the pixel opening 320; the barrier layer 500 is located on the side of the dam 200 away from the substrate 100, and the barrier layer 500 includes isolation pillars 520, at least a portion of the isolation pillars 520 being located within the orthographic projection of the dam 200 onto the substrate 100.

[0182] According to an embodiment of this application, the display panel 10 includes a display area AA and a non-display area NA. The display area AA is used to realize the light emission display of the display panel 10, and the non-display area NA is used to house photosensitive components. The display panel 10 also includes a substrate 100, a dam 200, an isolation structure 800, a pixel definition layer 300, a light-emitting layer 400, and a barrier layer 500. The isolation structure 800 is disposed on the substrate 100 and forms a plurality of isolation openings 840 to isolate the light-emitting layer 400 to form mutually disconnected light-emitting units 410, thereby reducing crosstalk of charge carriers in the light-emitting layer 400, improving the display effect of the display panel 10, and eliminating the need for a precision mask in the fabrication of the light-emitting units 410, thus reducing the development and use of precision masks and lowering the manufacturing cost. The pixel definition layer 300 includes a pixel limiting portion 310 and a defining portion 330. The pixel limiting portion 310 is located in the display area AA to define the light-emitting area of ​​the display area AA, and the light-emitting units 410 are disposed within the pixel openings 320 to realize the light emission display. The dam 200 forms a barrier against the second encapsulation layer 720 of the organic material, preventing the second encapsulation layer 720 from overflowing to the side of the dam 200 away from the display area AA. A barrier layer 500 is also provided on the pixel definition layer 300, with at least a portion of the isolation pillars 520 disposed on the dam 200. The isolation pillars 520 can prevent the second encapsulation layer 720 from overflowing towards the side of the dam 200 away from the display area AA, increasing the overflow path and difficulty of the second encapsulation layer 720, further improving the barrier effect against the organic material, and mitigating the overflow of the second encapsulation layer 720 towards the side of the dam 200 away from the display area AA, thereby improving the performance of the OLED display panel 10.

[0183] The structural design in this embodiment can be applied to other display panels 10. The specific choice can be made according to the actual situation, and this application does not impose any specific restrictions on it.

[0184] The third aspect of this application also provides a display device including the display panel 10 of any of the above embodiments. Since the display device provided in the third aspect of this application includes the display panel 10 of any of the above embodiments, it has the beneficial effects of the display panel 10 of any of the above embodiments, which will not be elaborated further here.

[0185] The display devices in this application include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0186] The fourth aspect of this application also provides a method for manufacturing a display panel 10. The display panel 10 can be any of the display panels 10 provided in the above embodiments. Please refer to the embodiments for further details. Figures 1 to 15 And see Figure 16 Figure 19 , Figure 15 This is a schematic flowchart of a method for manufacturing a display panel provided in an embodiment of this application; Figures 16 to 19 This is a process diagram illustrating the fabrication of a display panel according to an embodiment of this application. The display panel 10 includes adjacent display areas AA and non-display areas NA, and the fabrication method includes:

[0187] Step S01: Fabricate a dam on the substrate, with the dam located in the non-display area.

[0188] Step S02: Prepare a pixel definition layer on the substrate. The pixel definition layer includes a pixel defining portion located in the display area and a definition portion located in the non-display area. The pixel defining portion surrounds and forms a plurality of pixel openings. At least a portion of the definition portion is located on the side of the dam away from the substrate.

[0189] Step S03: Prepare a light-emitting layer on the substrate, the light-emitting layer comprising a plurality of light-emitting units at least partially located in the pixel opening.

[0190] Step S04: Prepare a barrier layer on the side of the pixel definition layer away from the substrate. The barrier layer has grooves, and at least part of the grooves are located within the orthogonal projection of the substrate.

[0191] According to the preparation method of the fourth aspect of this application, a dam 200 is prepared in step S01. A pixel definition layer 300 is prepared in step S02. The pixel definition layer 300 includes a pixel defining portion 310 and a defining portion 330. The pixel defining portion 310 is located in the display area AA to define the light-emitting area of ​​the display area AA. The light-emitting unit 410 is disposed in the pixel opening 320 to realize light emission display. The defining portion 330 is disposed on the dam 200 in the non-display area NA. The defining portion 330 and the dam 200 together form a barrier to the second encapsulation layer 720 of the organic material, preventing the second encapsulation layer 720 from overflowing to the side of the dam 200 away from the display area AA. A light-emitting layer 400 is prepared in step S03. A barrier layer 500 is prepared in step S04. A barrier layer 500 is also provided on the pixel definition layer 300. At least a portion of the barrier layer 500 is provided on the dam 200 and has a groove 510. The groove 510 is provided on the side of the dam 200 away from the substrate 100, which increases the overflow path and overflow difficulty of the second encapsulation layer 720, further improves the barrier effect of the second encapsulation layer 720 on organic materials, and improves the overflow of the second encapsulation layer 720 on the side of the dam 200 away from the display area AA, thereby improving the performance of the OLED display panel 10.

[0192] like Figure 17 and Figure 18 As shown, optionally, step S04 includes:

[0193] An inorganic material layer is prepared on the side of the pixel definition layer 300 away from the substrate 100. The inorganic material layer is patterned to obtain a barrier layer 500. A groove 510 is formed on the barrier layer 500. At least a portion of the groove 510 is located within the orthogonal projection of the dam 200 onto the substrate 100.

[0194] Optionally, patterning the inorganic material layer may include photolithography, etching, or other processes.

[0195] The embodiments described above are not exhaustive, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that, The display panel includes adjacent display areas and non-display areas, and the display panel further includes: substrate; A dam is located on one side of the substrate and in the non-display area; A pixel definition layer is located on one side of the substrate. The pixel definition layer includes a pixel defining portion located in the display area and a definition portion located in the non-display area. The pixel defining portion encloses and forms a plurality of pixel openings. At least a portion of the definition portion is located on the side of the dam away from the substrate. A 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 pixel opening; A barrier layer is located on the side of the pixel definition layer opposite to the substrate. The barrier layer has grooves formed on it, and at least a portion of the grooves are projected onto the substrate in the orthogonal projection of the dam onto the substrate.

2. The display panel according to claim 1, characterized in that, A plurality of the grooves are provided on the side of the dam facing away from the base plate; Preferably, the plurality of grooves are of the same or different sizes; Preferably, the plurality of grooves are spaced apart along the direction from the display area to the non-display area; Preferably, the plurality of grooves are evenly spaced; Preferably, the orthographic projection of the groove on the substrate is annular.

3. The display panel according to claim 2, characterized in that, The groove includes a first groove and a second groove located on the side of the same dam away from the substrate. The first groove is located on the side of the second groove close to the display area. The first groove has a first width along the direction from the display area to the non-display area, and the second groove has a second width along the direction from the display area to the non-display area. The first width is greater than or equal to the second width.

4. The display panel according to claim 1, characterized in that, The barrier layer includes an isolation pillar, and the groove is formed around the isolation pillar; Preferably, the plurality of isolation columns are spaced apart along the direction from the display area to the non-display area; Preferably, the plurality of isolation columns are of the same or different dimensions; Preferably, the orthographic projection of the isolation pillar on the substrate is annular.

5. The display panel according to claim 4, characterized in that, The isolation pillar includes a first isolation pillar and a second isolation pillar located on the side of the same dam away from the substrate. The first isolation pillar is located on the side of the second isolation pillar closer to the display area. The first isolation pillar has a first height in the thickness direction of the display panel, and the second isolation pillar has a second height in the thickness direction of the display panel. The first height is greater than or equal to the second height.

6. The display panel according to claim 4, characterized in that, The isolation pillar has a top surface and a bottom surface that are disposed opposite to each other in the thickness direction of the display panel. The bottom surface is located within the orthographic projection of the top surface on the substrate. Alternatively, the isolation pillar has a first portion and a second portion. The second portion is located on the side of the first portion away from the substrate. The surface of the first portion away from the substrate is located within the orthographic projection of the second portion near the substrate on the substrate.

7. The display panel according to claim 1, characterized in that, The material of the barrier layer may be the same as or different from the material of the pixel definition layer; Preferably, the material of the barrier layer includes inorganic materials; Preferably, the material of the pixel definition layer includes at least one of silicon oxide, silicon nitride, and silicon oxynitride; Preferably, the pixel defining layer is made of silicon nitride, and the barrier layer is made of silicon oxide.

8. The display panel according to claim 1, characterized in that, The display panel also includes: The first encapsulation layer is located in the display area and on the side of the light-emitting layer opposite to the substrate; Preferably, the first encapsulation layer includes a plurality of spaced encapsulation portions, the encapsulation portions being used to encapsulate the light-emitting unit; Preferably, the material of the first encapsulation layer includes inorganic materials; Preferably, at least a portion of the encapsulation portion of the barrier layer and the first encapsulation layer are disposed in the same layer and made of the same material, or the material of the barrier layer and the material of the first encapsulation layer are different; Preferably, the display panel further includes: The second encapsulation layer is located on the side of the first encapsulation layer away from the substrate and on the side of the dam facing the display area; The third encapsulation layer is located on the side of the second encapsulation layer away from the substrate and extends to the side of the dam away from the display area; Preferably, the material of the second encapsulation layer is an organic material; Preferably, the material of the third encapsulation layer is an inorganic material.

9. The display panel according to claim 1, characterized in that, The dam has an upper surface facing away from the substrate, and at least a portion of the groove is located on the upper surface of the dam within the orthographic projection of the substrate.

10. The display panel according to claim 1, characterized in that, The plurality of the aforementioned dams are spaced apart along the direction from the display area to the non-display area; Preferably, the groove is provided on the side of each of the plurality of dams away from the base plate.

11. The display panel according to claim 10, characterized in that, The dam includes a first dam and a second dam, the first dam being located on the side of the second dam closer to the display area, and at least part of the groove being disposed on the side of the first dam away from the substrate; Preferably, the dimension of the first dam in the thickness direction of the display panel is greater than or equal to the dimension of the second dam in the thickness direction of the display panel.

12. The display panel according to claim 1, characterized in that, The display panel also includes: An isolation structure is located on the side of the pixel definition layer opposite to the substrate. The isolation structure encloses and forms an isolation opening, and the isolation opening and the pixel opening are connected. Preferably, the display panel further includes: A first electrode is located between the substrate and the light-emitting unit, and at least a portion of the first electrode is exposed through the pixel opening; Preferably, the display panel further includes: The second electrode layer is located on the side of the light-emitting layer opposite to the substrate. The second electrode layer includes a second electrode located at the isolation opening, and the second electrode is electrically connected to the isolation structure. Preferably, the orthographic projection of the light-emitting unit onto the substrate is located within the orthographic projection of the second electrode onto the substrate.

13. The display panel according to claim 12, characterized in that, The isolation structure includes a first layer and a second layer, wherein the second layer is located on the side of the first layer that is away from the substrate; Preferably, the orthographic projection of the surface of the first layer away from the substrate onto the substrate lies within the orthographic projection of the surface of the second layer near the substrate onto the substrate. Preferably, the first layer comprises a conductive material; Preferably, the second layer comprises a conductive material or an insulating material; Preferably, the second layer comprises a metallic material, and the materials of the first layer and the second layer are different; Preferably, the isolation structure further includes a third layer located on the side of the first layer facing the substrate, wherein the orthographic projection of the surface of the first layer near the substrate onto the substrate lies within the orthographic projection of the surface of the third layer away from the substrate onto the substrate.

14. A display panel, characterized in that, The display panel includes adjacent display areas and non-display areas, and the display panel further includes: substrate; A dam is located on one side of the substrate and in the non-display area; A pixel definition layer is located on one side of the substrate. The pixel definition layer includes a pixel defining portion located in the display area, and the pixel defining portion encloses and forms a plurality of pixel openings. An isolation structure is located on the side of the pixel definition layer opposite to the substrate. The isolation structure encloses and forms an isolation opening, and the isolation opening and the pixel opening are connected. A 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 pixel opening; A barrier layer is located on the side of the dam away from the substrate, the barrier layer including isolation pillars, at least a portion of the isolation pillars having their orthographic projection on the substrate within the orthographic projection of the dam on the substrate.

15. The display panel according to claim 14, characterized in that, The barrier layer has grooves, and at least a portion of the grooves are located within the orthographic projection of the dam onto the substrate. Preferably, a plurality of the grooves are provided on the side of the dam facing away from the substrate; Preferably, the plurality of grooves are of the same or different sizes; Preferably, the plurality of grooves are spaced apart along the direction from the display area to the non-display area; Preferably, the plurality of grooves are evenly spaced; Preferably, the orthographic projection of the groove on the substrate is annular.

16. The display panel according to claim 14, characterized in that, The plurality of isolation columns are spaced apart along the direction from the display area to the non-display area; Preferably, the plurality of isolation columns are of the same or different dimensions; Preferably, the orthographic projection of the isolation pillar on the substrate is annular.

17. The display panel according to claim 14, characterized in that, The pixel definition layer also includes a definition portion located in the non-display area, and at least a portion of the definition portion is located on the side of the dam away from the substrate; Preferably, the isolation column is located on the defining portion.

18. The display panel according to claim 14, characterized in that, The plurality of the aforementioned dams are spaced apart along the direction from the display area to the non-display area; Preferably, the isolation column is provided on the side of each of the multiple dams away from the base plate.

19. A display device, characterized in that, Includes the display panel as described in any one of claims 1-18.

20. A method for manufacturing a display panel, characterized in that, The display panel includes adjacent display areas and non-display areas, and the method includes: A dam is fabricated on a substrate, the dam being located in the non-display area; A pixel definition layer is prepared on the substrate. The pixel definition layer includes a pixel defining portion located in the display area and a definition portion located in the non-display area. The pixel defining portion encloses and forms a plurality of pixel openings. At least a portion of the definition portion is located on the side of the dam away from the substrate. A light-emitting layer is prepared on the substrate, the light-emitting layer comprising a plurality of light-emitting units at least partially located in the pixel opening; A barrier layer is prepared on the side of the pixel definition layer opposite to the substrate, and a groove is formed on the barrier layer, wherein at least a portion of the groove is located within the orthogonal projection of the dam on the substrate.

Images