Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel includes: a substrate; the light-emitting element is located on the first side of the substrate, and the light-emitting element comprises a first electrode, a light-emitting layer and a second electrode which are arranged in a stacked mode; the isolation structure is located on the first side of the substrate, the isolation structure and the first electrode are arranged in a spaced mode in the direction parallel to the light emitting face of the display panel, the isolation structure is in lap joint with the second electrode, the isolation structure at least comprises a first isolation part, and the first isolation part and the first electrode are located on the same film layer and made of the same material. According to the embodiment of the invention, the display performance of the display panel can be improved.

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, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

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

[0004] Embodiments of the present application provide a display panel and a display device, which can improve the display performance of the display panel.

[0005] In a first aspect, an embodiment of the present application provides a display panel, comprising: a substrate; a light-emitting element located on a first side of the substrate, the light-emitting element comprising a first electrode, a light-emitting layer and a second electrode which are stacked; an isolation structure located on the first side of the substrate, the isolation structure and the first electrode being spaced apart in a direction parallel to a light-emitting surface of the display panel, the isolation structure overlapping the second electrode, the isolation structure comprising at least a first isolation portion, the first isolation portion and the first electrode being located in the same film layer and made of the same material.

[0006] In a second aspect, an embodiment of the present application provides a display device, comprising a display panel as described in the embodiment of the first aspect.

[0007] According to the display panel and the display device provided by the embodiments of the present application, an isolation structure is added to the display panel, the isolation structure is overlapped with the second electrode of the light-emitting element, and the isolation structure includes at least a first isolation portion, the first isolation portion and the first electrode of the light-emitting element are located in the same film layer and are made of the same material; on the one hand, a voltage can be input to the second electrode through the isolation structure, so that it is no longer limited to inputting voltage to the second electrode on both sides, thereby improving the problem of uneven display caused by voltage drop; on the other hand, the first isolation portion is in the same layer and made of the same material as the first electrode, so that both can be prepared at the same time through the same process steps, which is convenient for flexibly setting a wiring for transmitting the voltage required for the second electrode in the display area.

[0008] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] 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.

[0010] Figure 1 A schematic diagram showing a cross-sectional structure of a local area of ​​a display panel provided in an embodiment of the present application;

[0011] Figure 2 Another schematic cross-sectional structure diagram of a local area of ​​a display panel provided in an embodiment of the present application is shown;

[0012] Figure 3 A schematic diagram showing a top view of a local area of ​​a display panel provided in an embodiment of the present application is shown;

[0013] Figure 4 Another schematic diagram of a top view structure of a local area of ​​a display panel provided in an embodiment of the present application is shown;

[0014] Figure 5 Show Figure 1 A local enlarged schematic diagram of Q1 in the middle;

[0015] Figure 6 A schematic diagram showing a cross-sectional structure of a display panel during preparation provided by an embodiment of the present application;

[0016] Figure 7 Another schematic diagram of a cross-sectional structure of a display panel during preparation provided by an embodiment of the present application is shown;

[0017] Figure 8 Another schematic diagram of a cross-sectional structure of a display panel prepared in an embodiment of the present application is shown;

[0018] Fig. 9 Another schematic diagram of a cross-sectional structure of a display panel prepared in an embodiment of the present application is shown;

[0019] Fig.10 Another schematic diagram of a cross-sectional structure of a display panel prepared in an embodiment of the present application is shown;

[0020] Fig.11A schematic diagram showing another top view structure of a local area of ​​a display panel provided in an embodiment of the present application;

[0021] Fig.12 Show Figure 4 A schematic diagram of a cross-sectional structure in the AA direction;

[0022] Fig.13 A schematic diagram showing another top view structure of a local area of ​​a display panel provided in an embodiment of the present application;

[0023] Fig.14 Show Fig.13 A schematic diagram of a cross-sectional structure along the BB direction;

[0024] Fig.15 A schematic diagram showing another top view structure of a local area of ​​a display panel provided in an embodiment of the present application;

[0025] Fig.16 A schematic diagram of the structure of a display device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0026] 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 only to provide a better understanding of the present application by illustrating the examples of the present application.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0028] 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 another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0029] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0030] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0031] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0032] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0033] In the related art, the display panel is prone to display unevenness.

[0034] The inventors have found through research that the light-emitting element of the display panel includes a first electrode, a light-emitting layer, and a second electrode that are stacked. The second electrode is usually arranged in a whole layer, and voltage is provided to the second electrode from both sides to make the light-emitting layer emit light. However, since the second electrode has a larger area when the whole layer is arranged, the resistance of the second electrode is larger, and a voltage drop will occur during the transmission of voltage to the second electrode, resulting in uneven display of the display panel.

[0035] In view of the above technical problems, the embodiments of the present application provide a display panel and a display device. The embodiments of the present application are described clearly and completely below in conjunction with the accompanying drawings.

[0036] like Figure 1 As shown, the display panel provided in the embodiment of the present application includes a substrate 10 , a light emitting element 20 and an isolation structure 30 .

[0037] The substrate 10 may include a plurality of pixel circuits arranged in an array, and the pixel circuits are connected to the light-emitting elements to drive the light-emitting elements to emit light.

[0038] As an example, the display panel may include a low temperature polycrystalline oxide (LTPO) type display panel, in which case the display panel may include two active layers. Figure 2 Some film layer structures of the substrate 10 are shown, such as Figure 2 As shown, the substrate 10 includes a first active layer 11 and a second active layer 12. For example, the first active layer 11 includes low temperature polysilicon, and the material of the second active layer 12 includes indium gallium zinc oxide. In addition, the substrate 10 also includes a first gate metal layer GAT, a capacitor metal layer MC, a second gate metal layer MG, a first metal layer SD1, a second metal layer SD2 and some insulating layers. It should be noted that Figure 2 This is only an example and is not intended to limit the present application.

[0039] As another example, the display panel may include a low temperature polysilicon (LTPS) type display panel. In this example, the display panel may include an active layer.

[0040] Please continue to refer to Figure 1 The light emitting element 20 is located on the first side of the substrate 10, and the light emitting element 20 includes a first electrode 21, a light emitting layer 22, and a second electrode 23 that are stacked. The light emitting layer 22 includes an organic light emitting layer, and the first electrode 21 and the second electrode 23 are used to provide carriers with different polarities, that is, holes and electrons, to the light emitting layer 22, and the holes and electrons are combined in the light emitting layer 22 to emit light.

[0041] As an example, the first electrode may be an anode that provides holes, and the second electrode may be a cathode that provides electrons. As another example, the first electrode may also be a cathode that provides electrons, and the second electrode may be an anode that provides holes. In the following embodiments, the first electrode is an anode and the second electrode is a cathode.

[0042] The isolation structure 30 and the light emitting element 20 are located on the same side of the substrate 10 , and the isolation structure 30 and the first electrode 21 are spaced apart in a direction parallel to the light emitting surface of the display panel. It is understandable that the isolation structure 30 and the first electrode 21 are insulated.

[0043] The isolation structure 30 overlaps the second electrode 23. For example, the second electrode 23 overlaps the side of the isolation structure 30. The isolation structure 30 is conductive, and when the two overlap, the voltage signal can be transmitted to the second electrode 23 through the isolation structure 30.

[0044] The isolation structure 30 at least includes a first isolation portion 31. The first isolation portion 31 and the first electrode 21 are located in the same film layer and made of the same material. It is understandable that the first isolation portion 31 and the first electrode 21 can be prepared simultaneously using the same process.

[0045] by Figure 2 For example, the first electrode 21 usually needs to pass through a via hole ( Figure 2 The first via hole h1 in the display panel is connected to the pixel circuit 40, that is, the preparation process includes the step of preparing the first via hole h1. The first isolation portion 31 is in the same layer and material as the first electrode 21, so that when preparing the first via hole h1, the second via hole h2 connected to the first isolation portion 31 can be prepared, so as to facilitate the transmission of voltage to the first isolation portion 31 through the second via hole h2, and the voltage will be transmitted to the second electrode 23 through the isolation structure 30. It is understandable that a wiring for transmitting the voltage required by the second electrode 23 can be set in the display area of ​​the display panel, so that it is not limited to transmitting voltage to the second electrode on both sides.

[0046] According to the display panel provided in the embodiment of the present application, an isolation structure is added to the display panel, the isolation structure is overlapped with the second electrode of the light-emitting element, and the isolation structure includes at least a first isolation portion, the first isolation portion and the first electrode of the light-emitting element are located in the same film layer and are made of the same material; on the one hand, a voltage can be input to the second electrode through the isolation structure, so that it is no longer limited to inputting voltage to the second electrode on both sides, thereby improving the problem of uneven display caused by voltage drop; on the other hand, the first isolation portion is in the same layer and made of the same material as the first electrode, so that both can be prepared at the same time through the same process steps, which is convenient for flexibly setting a wiring for transmitting the voltage required for the second electrode in the display area.

[0047] In some embodiments, Figure 3 or Figure 4 As shown, the orthographic projection of the isolation structure 30 on the light emitting surface of the display panel surrounds the orthographic projection of the first electrode 21 on the light emitting surface of the display panel.

[0048] For example, each light emitting element may be provided with at least one isolation structure 30. The orthographic projection shape of the isolation structure 30 on the light emitting surface of the display panel matches the orthographic projection shape of the first electrode 21 on the light emitting surface of the display panel. Figure 3 As shown, the orthographic projection shapes of both are rectangles with rounded corners, or, as Figure 4 As shown, the orthographic projection shapes of the two are circular. Of course, the orthographic projection shapes of the two include but are not limited to Figure 3 and Figure 4 The shape shown, for example, may also be an ellipse, a pentagon, a hexagon, a trapezoid, etc.

[0049] It should be noted that the size and shape of each figure in the accompanying drawings do not reflect the actual proportion, and the purpose is only to illustrate the content of the embodiments of the present application. And the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0050] Exemplarily, the display panel includes light emitting elements with different luminous colors, such as Figure 3 or Figure 5 As shown, the display panel includes a red light emitting element, a green light emitting element and a blue light emitting element, the first electrode of the red light emitting element is denoted as 21R, the first electrode of the green light emitting element is denoted as 21G, and the first electrode of the blue light emitting element is denoted as 21B.

[0051] The first electrodes of the light-emitting elements with different luminous colors are disconnected from each other, so that the light-emitting elements with different luminous colors can be independently controlled. In addition, the light-emitting layers of the light-emitting elements with different luminous colors are disconnected from each other through the isolation structure, and the second electrodes of the light-emitting elements with different luminous colors can also be disconnected from each other through the isolation structure. In this way, when packaging, each light-emitting element can be independently packaged, thereby avoiding damage to the light-emitting element by water and oxygen (for example, water and oxygen in the PR stripping process or water and oxygen in the air).

[0052] The following is an exemplary introduction to some implementations in which the isolation structure can isolate the light-emitting layer and the second electrode of different light-emitting elements. It should be noted that the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0053] In some embodiments, please refer to Figure 1 and Figure 5The isolation structure 30 also includes a second isolation portion 32 and a third isolation portion 33. In the thickness direction Z of the display panel, the second isolation portion 32 is located between the first isolation portion 31 and the third isolation portion 33. The orthographic projection of the third isolation portion 33 on the substrate 10 at least covers the orthographic projection of the first surface s1 of the second isolation portion 32 on the substrate 10, and the first surface s1 of the second isolation portion 32 is in contact with the third isolation portion 33.

[0054] It is understandable that, in a direction parallel to the light emitting surface of the display panel, the width of the third isolation portion 33 is greater than the width of the first surface s1. The second isolation portion 32 and the third isolation portion 33 form an undercut structure as a whole.

[0055] The third isolation portion 33 protrudes from the top surface of the second isolation portion 32, and at least part of the side surface of the second isolation portion 32 is recessed inward to form a recessed portion 34. When preparing the light-emitting layer and the second electrode of the light-emitting element, the light-emitting layer 22 and the second electrode 23 are broken at the edge of the third isolation portion 33, and the light-emitting layer 22 and the second electrode 23 overlap with the side surface of the second isolation portion 32 in the recessed portion 34, so that the isolation structure 30 can separate the light-emitting layer and the second electrode of different light-emitting elements, and the second electrode overlaps the isolation structure.

[0056] The display panel further includes an encapsulation layer 60, which is located on the side of the second electrode 23 away from the substrate 10. The thickness of the encapsulation layer 60 is relatively thick, so the encapsulation layer 60 will not be broken at the edge of the third isolation portion 33, that is, the encapsulation layer 60 is continuous. The light-emitting layers of different light-emitting elements are separated by the isolation structure, so that the light-emitting layers of different light-emitting elements are independent of each other, so that each light-emitting element can be independently encapsulated to avoid PR peeling or water and oxygen in the air damaging the light-emitting layer, thereby ensuring the light-emitting effect of the light-emitting element.

[0057] Exemplarily, the encapsulation layer 60 may adopt TFE (Thin Film Encapsulation) technology. For example, the encapsulation layer 60 may include a plurality of stacked sub-film layers, some of which include CVD (Chemical Vapor Deposition) layers, and some of which include IJP (Ink Jet Print) layers. As an example, the encapsulation layer 60 includes a CVD1 layer, an IJP layer, and a CVD2 layer, and the IJP layer is located between the CVD1 layer and the CVD2 layer.

[0058] In some embodiments, please refer to Figure 5The second isolation portion 32 at least includes a first sub-portion 321, the first sub-portion 321 contacts the third isolation portion 33, and the surface of the first sub-portion 321 contacting the third isolation portion 33 is the first surface s1. In the direction parallel to the thickness direction Z of the display panel and in the direction away from the third isolation portion 33, the width of the first sub-portion 321 in the direction parallel to the light emitting surface direction X of the display panel gradually increases.

[0059] Exemplarily, the side surface of the first sub-portion 321 is an inclined surface, and the cross section of the first sub-portion 321 is a trapezoid. It is understandable that the side surface of the first sub-portion 321 is recessed inward to form a recessed portion 34, and the degree of the recess will become larger and larger in the thickness direction Z parallel to the display panel and closer to the third isolation portion 33, so that the light-emitting layer 22 and the second electrode 23 can be better ensured to be broken at the edge of the third isolation portion 33, thereby better ensuring that the light-emitting layers of different light-emitting elements are independent of each other.

[0060] Exemplarily, the materials of the first sub-portion 321 and the third isolation portion 33 are different. For example, the material of the first sub-portion 321 is etched by the etching solution at a faster rate than the material of the third isolation portion 33, that is, the material of the first sub-portion 321 is more easily etched by the etching solution, so that an etching process can be used during preparation to make the isolation structure an undercut structure.

[0061] Exemplarily, in the thickness direction Z of the display panel, the thickness of the first sub-portion 321 may be greater than the thickness of the third isolation portion 33. Exemplarily, in order to better ensure that the light-emitting layer 22 and the second electrode 23 can be broken at the edge of the third isolation portion 33, the thickness of the first sub-portion 321 may be greater than or equal to 800 nm (nanometers).

[0062] It is understandable that the thickness of the first sub-portion 321 is not infinite. For example, with the development of display technology, display panels are gradually becoming thinner and lighter. Therefore, the upper limit of the thickness of the first sub-portion 321 can be designed according to the actual overall parameter requirements of the display panel.

[0063] In some embodiments, please refer to Figure 5 The first surface s1 of the second isolation portion 32 contacts the second surface s2 of the third isolation portion 33 , and the distance between the edge of the first surface s1 and the edge of the second surface s2 is d1 , and d1 is greater than or equal to 0.5 um.

[0064] The larger the distance d1 between the edge of the first surface s1 and the edge of the second surface s2, the greater the possibility that the light-emitting layer 22 and the second electrode 23 will break at the edge of the third isolation portion 33. The inventors have found that when d1 is greater than or equal to 0.5um, it can better ensure that the light-emitting layer 22 and the second electrode 23 can break at the edge of the third isolation portion 33, thereby better ensuring the independence between different light-emitting elements, so as to ensure that the effect of independent packaging of different light-emitting elements can be achieved.

[0065] It is understandable that d1 is not infinite. For example, with the development of display technology, display panels are gradually moving towards high resolution. Therefore, the upper limit of d1 can be designed according to the requirements of the actual overall parameters of the display panel.

[0066] In some embodiments, please refer to Figure 5 The second isolation portion also includes a second sub-portion 322. In the thickness direction Z of the display panel, the second sub-portion 322 is located between the first sub-portion 321 and the first isolation portion 31, and the orthographic projection of the second sub-portion 322 on the substrate 10 overlaps with the orthographic projection of the third isolation portion 33 on the substrate 10.

[0067] It can be understood that, in a direction parallel to the light emitting surface of the display panel, the width of the third isolation portion 33 is equal to the width of the second sub-portion 322 .

[0068] Exemplarily, the speed at which the material of the third isolation portion 33 is etched by the etching liquid is equal to the speed at which the material of the second sub-portion 322 is etched by the etching liquid. For example, the material of the third isolation portion 33 is the same as the material of the second sub-portion 322.

[0069] Exemplarily, the material of the third isolating portion 33 includes, but is not limited to, aluminum (Al), and the material of the first sub-portion 321 includes, but is not limited to, titanium (Ti). In this example, the second sub-portion 322, the first sub-portion 321, and the third isolating portion 33 form a Ti / Al / Ti three-layer stacked structure.

[0070] In some embodiments, the first sub-portion 321 at least overlaps with the second electrode 23. In this way, it is ensured that there is a portion overlapping with the second electrode in the isolation structure 30, thereby ensuring that a voltage can be transmitted to the second electrode through the isolation structure.

[0071] Exemplarily, the first sub-portion 321 may also overlap with the light-emitting layer 22 .

[0072] Exemplarily, the light-emitting layer 22 is also overlapped with the second sub-portion 322. In the thickness direction of the display panel, the light-emitting layer 22 is closer to the substrate 10, and the light-emitting layer 22 can cover the portion of the second sub-portion 322 exposed in the first sub-portion 321 and the first isolation portion 31, so that only the light-emitting layer 22 and the second electrode 23 can overlap with the second sub-portion 322.

[0073] In some embodiments, please refer to Figure 1 and Figure 5 The display panel also includes a pixel defining portion 71, which is located on the first side of the substrate 10. The pixel defining portion 71 encloses a pixel opening K, and the pixel opening K exposes at least a portion of the first electrode 21. The distance between the orthographic projection of the pixel defining portion 71 on the substrate 10 and the orthographic projection of the isolation structure 30 on the substrate 10 is d2, 2um<d2<5um.

[0074] Exemplarily, the pixel defining portion 71 includes an organic material, and a patterned pixel defining portion 71 can be formed by exposure and development during preparation. During the preparation process, the isolation structure 30 can be formed first, and then the pixel defining portion 71 can be formed. The inventors have found through research that the distance between the pixel defining portion 71 and the isolation structure satisfies 2um<d2<5um, which can avoid adverse effects on the isolation structure during the preparation of the pixel defining portion, and avoid excessive spacing between adjacent light-emitting elements, thereby meeting the requirements of high resolution.

[0075] Exemplarily, the light emitting layer 22 includes a portion located in the pixel opening K and a portion extending outside the pixel opening K. The light emitting layer 22 located in the pixel opening K serves as an effective light emitting layer portion of the light emitting element.

[0076] Exemplarily, in the thickness direction of the display panel, the thickness of the pixel defining portion 71 may be less than the thickness of the isolation structure 30, where the thickness of the isolation structure 30 includes the sum of the thicknesses of the first isolation portion 31, the second isolation portion 32, and the third isolation portion. The thickness of the pixel defining portion 71 is relatively thin, so that the pixel defining portion 71 can reduce the shielding of the large-angle light emitted by the light-emitting element, thereby facilitating viewing of the display screen of the display panel even at a large viewing angle.

[0077] Of course, in other examples, for example, the thickness of the pixel defining portion 71 may be designed to be greater than or equal to the thickness of the isolation structure 30 according to requirements.

[0078] The following is an exemplary introduction to the preparation process of some structures in the display panel.

[0079] First, if Figure 6As shown, a first electrode film 201 is formed on the first side of the substrate 10. The first electrode film 201 covers the entire display area. In other words, the first electrode film 201 is a continuous whole in the entire display area. Exemplarily, the first electrode film 201 can be a laminated structure. For example, a laminated structure of ITO (Indium tin oxide) / Ag (silver) / ITO. It is understandable that the first electrode formed subsequently in this example is also a laminated structure of ITO / Ag / ITO.

[0080] Then, if Figure 7 As shown, an isolation film 301 is formed on the side of the first electrode film 201 facing away from the substrate 10. Here, the isolation film 301 covers the first electrode film 201. In other words, in the entire display area, the isolation film 301 is a continuous whole. Exemplarily, the isolation film 301 can be a laminated structure. For example, the isolation film 301 includes a first sub-film 3011, a second sub-film 3012 and a third sub-film 3013 that are sequentially away from the substrate 10. For example, the isolation film 301 includes a laminated structure of Ti / AL / Ti. It is understandable that at least part of the isolation structure subsequently formed in this example is also a laminated structure of Ti / AL / Ti. Exemplarily, the thickness of the second sub-film 3012 can be greater than 800nm.

[0081] Next, Figure 7 The isolation film 301 shown is subjected to a graphic process to obtain Figure 8 The middle isolation portion 302 is shown. For example, the patterning process can be performed by using a chlorine (Cl2) etching process. For example, the width of the middle isolation portion 302 can be greater than 3 um (micrometer).

[0082] Next, Figure 8 The first electrode film 201 and the middle isolation portion 302 are patterned to obtain Fig. 9 The first electrode 21 and the isolation structure 30 are shown. Here, the isolation structure 30 includes a first isolation portion 31, a second isolation portion 32 and a third isolation portion 33. The second isolation portion 32 includes a first sub-portion 321 and a second sub-portion.

[0083] For example, taking the first electrode film 201 including ITO / Ag / ITO stacking and the middle isolation part 302 including Ti / AL / Ti stacking as an example, a patterning process can be performed by a weak acid (acetic acid, phosphoric acid) etching solution to achieve the patterning process of the first electrode film 201. At the same time, the first sub-part 321 will also be etched by the weak acid etching solution, and the second sub-part 322 and the third isolation part 33 will basically not be etched, thereby forming an isolation structure 30 in the form of an undercut. For example, in order to ensure the subsequent packaging effect, here, the spacing d1 can be greater than 0.5um (micrometer).

[0084] Then, if Fig.10 As shown, a patterned pixel defining portion 71 is formed. Exemplarily, the pixel defining portion 71 is a photosensitive organic film, which can be patterned by exposure and development. The distance d2 between the pixel defining portion 71 and the isolation structure 30 can satisfy: 2um<d2<5um.

[0085] After the pixel defining portion is prepared, the light-emitting layer, the second electrode, the encapsulation layer, etc. can be prepared. It should be noted that since the present application is provided with an isolation structure, the light-emitting layer of the light-emitting element can be isolated. Therefore, in the process of preparing the light-emitting layer, it is not necessary to use FMM (Fine Metal Mask, high-precision metal mask).

[0086] The above embodiments introduce some preparation methods of the first electrode and the isolation structure. Of course, this is not intended to limit the present application.

[0087] like Figure 3 or Figure 4 As shown, the isolation structure 30 and the first electrode 21 can be arranged in a one-to-one correspondence. In other words, the isolation structure 30 and the light emitting element are arranged in a one-to-one correspondence.

[0088] In other embodiments, Fig.11 As shown, the same first electrode 21 may be surrounded by a plurality of isolation structures 30 electrically connected to each other.

[0089] When a plurality of isolation structures 30 electrically connected to each other surround the same first electrode 21, the number of isolation structures 30 connected to the second electrode 23 corresponding to the first electrode 21 is also greater, which is more conducive to reducing the resistance of the second electrode in the entire display area to improve the brightness uniformity. In addition, when the resistance of the second electrode in the entire display area is reduced, power consumption can also be reduced.

[0090] In some embodiments, the spacing between adjacent isolation structures 30 surrounding the same first electrode 21 in a direction parallel to the light emitting surface of the display panel is d3, and 3um≤d3≤5um.

[0091] For example, the isolation structure may be designed in the form of a double ring to surround one first electrode.

[0092] In some embodiments, Fig.12 or Fig.13 As shown, the first isolation parts 31 of adjacent isolation structures 30 are electrically connected. In this example, adjacent isolation structures 30 are electrically connected to each other, so that the multiple isolation structures in the display area are equivalent to forming a grid structure, which can further reduce the resistance of the second electrode in the entire display area.

[0093] As an example, Fig.12As shown, the display panel further includes an auxiliary electrode line 51, and the auxiliary electrode line 51 is electrically connected to the first isolation portion 31 of the isolation structure 30 through a via hole. It is understandable that the auxiliary electrode line 51 and the isolation structure 30 are located in different film layers. Figure 2 As shown, the auxiliary electrode line 51 may be located in the second metal layer SD2, the first isolation portion 31 and the first electrode 21 are located in the anode layer, and the metal layer where the second isolation portion 32 and the third isolation portion 33 are located may be referred to as the third metal layer SD3. The material of the third metal layer SD3 may be the same as that of the second metal layer SD2, for example, the material of the third metal layer SD3 and the second metal layer SD2 both include a stack of Ti / AL / Ti.

[0094] The connecting via hole between the auxiliary electrode line 51 and the first isolation portion 31 is marked as the second via hole h2. Figure 2 and Fig.12 The first electrode 21 is connected to the pixel circuit 40 through the first via hole h1, and the first via hole h1 and the second via hole h2 can be formed in the same process step.

[0095] In the case where the display panel includes auxiliary electrode lines 51, adjacent isolation structures are connected by wirings in different film layers, so that the film layer where the isolation structure is located has space for arranging other wirings. Fig.13 and Fig.14 The data line 52 of the display panel and the isolation structure 30 are located in the same film layer and made of the same material. By setting the two to be in the same layer and made of the same material, the two can be prepared at the same time through the same process steps; in addition, under normal circumstances, the data line is indispensable, so the present application is equivalent to adding an isolation structure without adding a metal layer to the display panel.

[0096] like Fig.13 As shown, when the data line 52 and the isolation structure 30 are arranged in the same layer, the data line 52 needs to be routed around the isolation structure 30. For example, the data line 52 is a meander line, and the data line 52 extends along the second direction Y as a whole, and the plurality of data lines 52 are distributed at intervals in the first direction X. The first direction X intersects with the second direction Y. For example, the first direction X is a row direction, and the second direction Y is a column direction.

[0097] Exemplarily, the isolation structure 30 and the data line 52 include the same number of stacked layers and the same material of each stacked layer. For example, the isolation structure 30 includes a first isolation portion 31, a second sub-portion 322, a first sub-portion 321, and a third isolation portion 33 that are sequentially away from the substrate 10; the data line 52 may include a first sub-data line 521, a second sub-data line 522, a third sub-data line 523, and a fourth sub-data line 524 that are sequentially away from the substrate 10, wherein the first isolation portion 31, the first sub-data line 521, and the first electrode 21 are located in the same film layer and are made of the same material; the second sub-portion 322 and the second sub-data line 522 are located in the same film layer and are made of the same material; the first sub-portion 321 and the third sub-data line 523 are located in the same film layer and are made of the same material; the third isolation portion 33 and the fourth sub-data line 524 are located in the same film layer and are made of the same material.

[0098] In some embodiments, please refer to Fig.13 and Fig.14 The display panel further includes a connection line 53 located in the display area, and the connection line 53 is electrically connected to the data line 52 and a driving chip (not shown in the figure). The data signal output by the driving chip can be transmitted to the data line 52 through the connection line 53, and then transmitted to the pixel circuit through the data line 52. The connection line 53 and the data line 52 are both located in the display area, and the connection line 53 can be called a FIAA (Fanout in AA, a fan-out line set in the display area) line, which is conducive to achieving a narrow frame.

[0099] The connection line 53 includes a first section 531 and a second section 532 connected to each other, wherein the second section 532 is connected between the first section 531 and the data line 52 , and the first section 531 , the data line 52 and the isolation structure 30 are located in the same film layer and made of the same material.

[0100] like Fig.13 As shown, when the first section 531, the data line 52 and the isolation structure 30 are arranged in the same layer, the first section 531 needs to be routed around the data line 52 and the isolation structure 30. For example, the first section 531 is a bending line, and the first section 531 extends along the second direction Y as a whole.

[0101] Exemplarily, the first segment 531 is parallel to the adjacent data line 52 and spaced apart from each other.

[0102] The second segment 532 is located in a different film layer from the data line 52, the isolation structure 30, and the first segment 531. For example, the orthographic projection of the second segment 532 on the substrate 10 may intersect with the orthographic projection of the data line 52 on the substrate 10. For another example, the orthographic projection of the second segment 532 on the substrate 10 may intersect with the orthographic projection of the isolation structure 30 on the substrate 10. For another example, the orthographic projection of the second segment 532 on the substrate 10 may intersect with the orthographic projection of the first electrode 21 on the substrate 10.

[0103] As an example, Fig.14 As shown, the second section 532 and the auxiliary electrode line 51 are located in the same film layer and made of the same material. In this case, the second section 532 needs to be routed around the auxiliary electrode line 51 to avoid signal crosstalk between the two.

[0104] For example, the second segment 532 and the auxiliary electrode line 51 may be located as follows: Figure 2 The second metal layer SD2 is shown. Exemplarily, the first metal layer SD1 may include a power signal line (PVDD signal line).

[0105] The above embodiments introduce some exemplary structures in which adjacent isolation structures are electrically connected through auxiliary electrode lines 51 of other film layers.

[0106] In other embodiments, Fig.15 As shown, the first isolation part 31 of the adjacent isolation structure is an integrated structure. The first isolation part 31 of the display panel constitutes a grid structure as a whole, and the grid of the first isolation part 31 includes the first electrode 21. In this embodiment, no additional connection wiring located in other film layers is required to connect the adjacent isolation structures, and the first isolation part 31 of the adjacent isolation structure is an integrated structure, which is more conducive to reducing the resistance of the second electrode.

[0107] Exemplarily, when the first isolation part 31 of the adjacent isolation structure is an integrated structure, the data line of the display panel and the first isolation part are located in different film layers. Since the first isolation part is an integrated structure, there is not enough space to set the data line in the film layer where the first isolation part is located. In this case, the data line can be set in other film layers.

[0108] The present application also provides a display device, including the display panel provided by the present application. Fig.16 , Fig.16 It is a structural schematic diagram of a display device provided in an embodiment of the present application. Fig.16 The provided display device 1000 includes a display panel 100 , and the display panel 100 includes the display panel provided by any of the above embodiments of the present application. Fig.16 The embodiment only takes a mobile phone as an example to illustrate the display device 1000. It can be understood that the display device provided in the embodiment of the present application can be a wearable product, a computer, a television, a car display device, or other display devices with display functions, and the present application does not make specific restrictions on this. The display device provided in the embodiment of the present application has the beneficial effects of the display panel provided in the embodiment of the present application. For details, please refer to the specific description of the display panel in the above embodiments, and this embodiment will not be repeated here.

[0109] According to the embodiments described above in the present application, these embodiments do not describe all the details in detail, nor do they limit the present application to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that: include: substrate; A light-emitting element is located on the first side of the substrate, and includes a first electrode, a light-emitting layer, and a second electrode that are stacked; An isolation structure is located on the first side of the substrate, the isolation structure and the first electrode are spaced apart in a direction parallel to the light emitting surface of the display panel, the isolation structure overlaps the second electrode, and the isolation structure includes at least a first isolation portion, the first isolation portion and the first electrode are located in the same film layer and are made of the same material.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the isolation structure on the light emitting surface of the display panel surrounds the orthographic projection of the first electrode on the light emitting surface of the display panel.

3. The display panel according to claim 1, characterized in that: The isolation structure further includes a second isolation portion and a third isolation portion, and in the thickness direction of the display panel, the second isolation portion is located between the first isolation portion and the third isolation portion; The orthographic projection of the third isolating portion on the substrate at least covers the orthographic projection of the first surface of the second isolating portion on the substrate, and the first surface of the second isolating portion is in contact with the third isolating portion.

4. The display panel according to claim 3, characterized in that: The second isolating portion includes at least a first sub-portion, which is in contact with the third isolating portion. The width of the first sub-portion in a direction parallel to the thickness of the display panel and in a direction away from the third isolating portion gradually increases in a direction parallel to the light emitting surface of the display panel.

5. The display panel according to claim 4, characterized in that: The second isolating portion further includes a second sub-portion, which is located between the first sub-portion and the first isolating portion in the thickness direction of the display panel, and the orthographic projection of the second sub-portion on the substrate overlaps with the orthographic projection of the third isolating portion on the substrate.

6. The display panel according to claim 5, characterized in that: The first sub-portion at least overlaps the second electrode.

7. The display panel according to claim 3, characterized in that: The first surface of the second isolation portion contacts the second surface of the third isolation portion, and a distance between an edge of the first surface and an edge of the second surface is d1, and d1 is greater than or equal to 0.5 um.

8. The display panel according to claim 1, characterized in that: The display panel also includes a pixel defining portion, which is located on the first side of the substrate. The pixel defining portion encloses a pixel opening, and the pixel opening exposes at least a portion of the first electrode. The spacing between the orthographic projection of the pixel defining portion on the substrate and the orthographic projection of the isolation structure on the substrate is d2, 2um<d2<5um.

9. The display panel according to claim 2, characterized in that: The same first electrode is surrounded by a plurality of the isolation structures which are electrically connected to each other.

10. The display panel according to claim 9, characterized in that: The spacing between the adjacent isolation structures surrounding the same first electrode in a direction parallel to the light emitting surface of the display panel is d3, and 3um≤d3≤5um.

11. The display panel according to claim 1, characterized in that: The first isolation parts of adjacent isolation structures are electrically connected.

12. The display panel according to claim 11, characterized in that: The display panel further includes an auxiliary electrode line, and the auxiliary electrode line is electrically connected to the first isolation portion of the isolation structure through a via hole.

13. The display panel according to claim 12, characterized in that: The data line of the display panel and the isolation structure are located in the same film layer and are made of the same material.

14. The display panel according to claim 13, characterized in that: The display panel further comprises a connection line located in the display area, wherein the connection line is electrically connected to the data line and the driving chip; The connecting line includes a first section and a second section connected to each other, the second section is connected between the first section and the data line, and the first section, the data line and the isolation structure are located in the same film layer and made of the same material.

15. The display panel according to claim 14, characterized in that: The second segment and the auxiliary electrode line are located in the same film layer and are made of the same material.

16. The display panel according to claim 11, characterized in that: The first isolation parts adjacent to the isolation structures are an integral structure.

17. The display panel according to claim 16, characterized in that: The data line of the display panel and the first isolation portion are located in different film layers.

18. A display device, characterized in that: Comprising the display panel according to any one of claims 1 to 17.

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