Display panel and display device

Abstract

The invention relates to the technical field of display, and particularly provides a display panel and a display device.The display panel comprises a substrate, a pixel definition layer and an isolation structure, the pixel definition layer is located on the substrate, and a through first via hole is formed in the pixel definition layer; the isolation structure is located on the side, back on to the substrate, of the pixel definition layer, and a second via hole is formed in the isolation structure; and the first via hole and the second via hole are communicated with each other and form a deflation opening. According to the display panel, the vent opening formed by the first via hole formed in the pixel definition layer and the second via hole formed in the isolation structure serves as a water vapor discharge channel of the substrate, water vapor generated by the substrate in a high-temperature manufacturing process is directly discharged, and the probability that dark spots appear between the substrate and an adjacent film layer due to poor stripping is reduced; and the display effect of the display panel is improved.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and more specifically, to a display panel and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) display panel is a display device that uses the self-luminous principle of organic light-emitting materials to achieve display; it has the advantages of fast response speed, high brightness, and full viewing angle, making it a very competitive type of display panel with good development prospects.

[0003] However, some film layers in current OLED display panels will generate water vapor, thereby affecting the display effect of the display panel. Summary of the invention

[0004] The present application provides a display panel and a display device, which can at least to some extent overcome the technical problem that the display effect of the display panel is affected by water vapor.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows: in a first aspect, a display panel is provided, comprising a substrate, a pixel definition layer and an isolation structure, wherein the pixel definition layer is located on the substrate, and a first through hole is provided on the pixel definition layer; the isolation structure is located on a side of the pixel definition layer facing away from the substrate, and a second through hole is provided on the isolation structure;

[0006] Wherein, the first via hole and the second via hole are interconnected and constitute a venting opening.

[0007] In the display panel provided in the embodiment of the present application, the venting opening formed by the first via located on the pixel definition layer and the second via located on the isolation structure can serve as a water vapor discharge channel connected to the substrate, and directly discharge the water vapor generated by the substrate under the high-temperature process to avoid water vapor remaining between the film layers, resulting in increased internal pressure of the film, poor peeling and poor bubbling between the film layers, and other defects; in addition, it can also help improve the reliability of the display panel, effectively reduce the possibility of water and oxygen erosion of the display panel due to film peeling, and help optimize the display effect of the display panel.

[0008] Optionally, the display panel further includes a first electrode layer, the first electrode layer is located between the substrate and the pixel definition layer, and the first electrode layer includes at least two first electrode blocks arranged at intervals;

[0009] The orthographic projection of the first via hole on the substrate and the orthographic projection of the first electrode block on the substrate are arranged alternately.

[0010] Optionally, an orthographic projection of any one of the first via holes on the substrate is located between orthographic projections of two adjacent first electrode blocks on the substrate.

[0011] Optionally, the orthographic projection of the first via hole on the substrate is located within the orthographic projection range of the second via hole on the substrate;

[0012] Alternatively, an orthographic projection outer contour of the first via hole on the substrate coincides with an orthographic projection outer contour of an end of the second via hole facing the substrate on the substrate.

[0013] Optionally, a pixel opening is formed on the pixel definition layer, an isolation opening is formed on the isolation structure, and the pixel opening and the isolation opening are arranged correspondingly and are interconnected.

[0014] Optionally, part of the first electrode block is exposed relative to the isolation opening through the pixel opening.

[0015] Optionally, an orthographic projection of the pixel opening on the substrate is located within an orthographic projection of the correspondingly arranged isolation opening on the substrate.

[0016] Optionally, the display panel further includes a filling unit and an encapsulation layer, wherein the filling unit is at least partially located in the isolation opening, and the encapsulation layer is located on a side of the filling unit facing away from the substrate.

[0017] Optionally, the encapsulation layer includes a first encapsulation portion and a second encapsulation portion, the first encapsulation portion is located in the isolation opening, and the second encapsulation portion is located on a side of the isolation structure facing away from the substrate.

[0018] Optionally, the packaging layer further includes a third packaging portion located in the degassing opening, the filling unit is provided in the degassing opening, and the filling unit is located between at least a portion of the third packaging portion and the substrate.

[0019] Optionally, at least a portion of the third packaging portion is connected to the second packaging portion.

[0020] Optionally, the filling unit is provided between at least one of the second packaging parts and an end surface of the adjacent isolation structure facing away from the substrate.

[0021] Optionally, at least two layers of the filling units are stacked between at least one of the second packaging parts and an end surface of the adjacent isolation structure facing away from the substrate.

[0022] Optionally, the third encapsulation part includes a first encapsulation sub-part and a second encapsulation sub-part, the first encapsulation sub-part covers the side wall of the venting opening, and the second encapsulation sub-part is located on a side of the filling unit facing away from the substrate and is connected to at least part of the first encapsulation sub-part.

[0023] Optionally, at least two layers of the filling units are stacked in at least a portion of the air release openings.

[0024] Optionally, different filling units stacked in the same air release opening have different colors of emitted light under power-on conditions.

[0025] Optionally, part of the second packaging portion is spaced apart from an end surface of an adjacent isolation structure facing away from the substrate.

[0026] Optionally, the filling unit includes a light-emitting film layer and a second electrode layer stacked in sequence, and the second electrode layer is located on a side of the light-emitting film layer facing away from the substrate.

[0027] Optionally, the light-emitting film layer located in the isolation opening is connected to the first electrode block via the pixel opening;

[0028] The second electrode layer located in the isolation opening is electrically connected to a side wall of the isolation structure facing the isolation opening.

[0029] Optionally, the first electrode layer is an anode layer, the first electrode block is an anode block, and the second electrode layer is a cathode layer.

[0030] Optionally, the isolation structure comprises a supporting portion and a crown portion stacked in sequence, and the crown portion is located on a side of the supporting portion facing away from the substrate;

[0031] The orthographic projection of the support portion on the base is located within the orthographic projection range of the crown portion on the base.

[0032] Optionally, the isolation structure further includes a root portion, the support portion is located on a side of the root portion facing away from the substrate, and the orthographic projection of the root portion on the substrate is within the range of the orthographic projection of the crown portion on the substrate.

[0033] Optionally, the orthographic projection of the support portion on the substrate is located within the range of the orthographic projection of the root portion on the substrate.

[0034] Optionally, an orthographic projection of the root on the substrate does not coincide with an orthographic projection of the first via on the substrate.

[0035] Optionally, there are multiple venting openings, which are evenly arranged on the display panel.

[0036] In a second aspect, the present application provides a display panel, comprising a substrate, a first electrode layer, a pixel definition layer and an isolation structure, wherein the first electrode layer is located on the substrate and comprises at least two first electrode blocks arranged at intervals; the pixel definition layer is located on the side of the first electrode layer facing away from the substrate, and the pixel definition layer is provided with first via holes and pixel openings arranged at intervals, and the orthographic projection of the first electrode block on the substrate and the orthographic projection of the first via hole on the substrate are arranged at intervals; the isolation structure is located on the side of the pixel definition layer facing away from the substrate, and the isolation structure is provided with second via holes and isolation openings arranged at intervals; wherein the first via holes and the second via holes are interconnected and constitute a venting opening, and the pixel opening and the isolation opening are interconnected.

[0037] In a third aspect, the present application further provides a display device, comprising any of the display panels described above.

[0038] The display device provided in the embodiment of the present application includes the above-mentioned display panel, so the display device at least includes the beneficial effects of any one or several of the above-mentioned display panels. The specific effects are described above and will not be repeated here.

[0039] The display panel and display device provided by the present application have the following beneficial effects: compared with the related art, the display panel provided by the present application can directly discharge the water vapor and the like generated by the substrate in the high-temperature process through the venting openings penetrating the above-mentioned pixel definition layer and the isolation structure, so as to prevent the residual water vapor from causing poor peeling and bubbling between the film layers, reduce the possibility of water and oxygen erosion of the display panel due to the above-mentioned defects, and optimize the display effect of the display panel to a certain extent; when a first electrode layer is provided between the substrate and the pixel definition layer, the above-mentioned venting opening can avoid the provision of the first electrode block, and effectively reduce the probability of poor film peeling between the substrate and the first electrode block without affecting the normal function of the first electrode block; the filling unit and the packaging layer located in the above-mentioned venting opening are used to provide better protection for the substrate located below the venting opening, avoid damage to the substrate in subsequent processes, further improve the reliability and durability of the display panel, and make the display panel have a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0041] Figure 1 A schematic diagram of the planar structure of a display panel provided in an embodiment of the present application;

[0042] Figure 2 for Figure 1 A schematic diagram of the arrangement of pixel units in the S1 region in a certain embodiment of the display panel is shown;

[0043] Figure 3 for Figure 2 A cross-sectional view of a film layer provided by an embodiment at AA;

[0044] Figure 4 for Figure 2 A cross-sectional view of a film layer provided by another embodiment at AA;

[0045] Figure 5 for Figure 1 A schematic diagram of the arrangement of pixel units in another embodiment of a display panel is shown;

[0046] Figure 6 A schematic diagram of the planar structure of a display device provided in an embodiment of the present application.

[0047] Among them, the reference numerals in the figure are:

[0048] 1. substrate; 2. pixel definition layer; 201. first via hole; 202. pixel opening; 3. isolation structure; 301. second via hole; 302. isolation opening; K. venting opening; 31. support part; 32. crown; 33. root; 4. first electrode layer; 41. first electrode block; 5. filling unit; 51. light-emitting film layer; 52. second electrode layer; 6. encapsulation layer; 61. first encapsulation part; 62. second encapsulation part; 63. third encapsulation part; 631. first encapsulation sub-part; 632. second encapsulation sub-part;

[0049] 10. Display panel;

[0050] 100. Display device. DETAILED DESCRIPTION

[0051] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0052] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0053] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] In this application, unless otherwise clearly specified and limited, the terms "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, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0058] The term "layer" used in the text may refer to a material portion including an area with a certain thickness. A layer may extend over the entire underlying structure or overlying structure, or may have a range smaller than the range of the underlying or overlying structure. In addition, a layer may be an area of ​​a homogeneous or inhomogeneous continuous structure, the thickness of which is less than the thickness of the continuous structure. For example, a layer may be located between the top surface and the bottom surface of the continuous structure or between any paired lateral planes at the top surface and the bottom surface. A layer may extend laterally, vertically and / or along a tapered surface. A substrate may be a layer, may include one or more layers therein, and / or may have one or more layers located thereon, above it and / or below it. A layer may include multiple layers. For example, an interconnect layer may include one or more conductors and a contact layer (forming contacts, interconnects and / or vias therein) and one or more dielectric layers.

[0059] In the process of implementing the present invention, the inventors found that the related art has the following problems: some pixel units have dark spot failures, which affect the display effect of the display panel 10 to a certain extent and ultimately affect its performance.

[0060] Based on this, an embodiment of the present application provides a display panel 10 to alleviate or improve the above technical problems at least to a certain extent.

[0061] The contents of the isolation structure mentioned below are further described in patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 100935, PCT / CN2024 / 102785, PCT / CN2024 / 099419, PCT / CN2024 / 099072, and CN116685174A for reference.

[0062] The display panel 10 includes a substrate 1, a pixel definition layer 2 and an isolation structure 3. The pixel definition layer 2 is located on the substrate 1, and a first through hole 201 is opened on the pixel definition layer 2; the isolation structure 3 is located on the side of the pixel definition layer 2 facing away from the substrate 1, and a second via hole 301 is opened on the isolation structure 3; the first via hole 201 and the second via hole 301 are interconnected and form a venting opening K.

[0063] The first via hole 201 located on the pixel definition layer 2 and the second via hole 301 located on the isolation structure 3 are interconnected and form a venting opening K. The venting opening K is in communication with the substrate 1 and can serve as a water vapor discharge channel of the substrate 1. Under the relevant process, the substrate 1 will release the absorbed water vapor and the like in the form of gas, and the released gas can be discharged from the inside of the display panel 10 through the venting opening K, so as to prevent the water vapor and the like from remaining in the film layer of the display panel 10, thereby overcoming the defects such as poor peeling and poor bubbling caused by the increase in the internal pressure of the film inside the display panel 10, and effectively improving the reliability and service life of the display panel 10. In addition, the above-mentioned venting opening K can reduce the probability of poor peeling and poor bubbling of the film layer, thereby reducing the possibility of water and oxygen erosion of the display panel 10 due to film peeling, which helps to optimize the display effect of the display panel 10.

[0064] The substrate 1 includes an organic material. The organic material has a certain water absorption and absorbs a certain amount of water during the preparation of the film layer. Under process conditions such as high temperature process and ultraviolet irradiation, the organic material will release the absorbed water in gaseous form, and the film layers such as the pixel definition layer 2 and the isolation structure 3 located on one side of the substrate 1 will cover the above-mentioned organic material, resulting in the gas generated by the organic material cannot be released, thereby causing bubbling, peeling and other defects on the side of the substrate 1 facing the pixel definition layer 2. The first via 201 on the pixel definition layer 2 and the second via 301 on the isolation structure 3 are arranged relative to each other and form a connected venting opening K. The venting opening K formed by the first via 201 and the second via 301 can realize the connection between the substrate 1 and the external environment, so that the water vapor generated by the substrate 1 can be released through the venting opening K, that is, the excessive water vapor in the substrate 1 is directly introduced to the outside of the display panel 10, so as to prevent the occurrence of peeling and other problems between the substrate 1 and the adjacent film layer, thereby improving the reliability and service life of the display panel 10.

[0065] In some embodiments, the opening size and opening shape of the first via hole 201 are consistent or substantially consistent with the opening size and opening shape of the second via hole 301 .

[0066] The film layer prepared from organic materials has good flatness and good bending resistance, which helps to prepare subsequent film layers through methods such as chemical vapor deposition, physical vapor deposition, atomic layer deposition, etc. in subsequent processing steps, and can also be prepared by evaporation and other methods in subsequent processes.

[0067] In some embodiments, the preparation material of the pixel definition layer 2 includes an inorganic material, and the inorganic material has a certain water vapor barrier performance, which can achieve the barrier of water vapor released from the substrate 1, prevent the water vapor from affecting the isolation structure 3, and improve the reliability of the display panel 10. The first via hole 201 provided on the pixel definition layer 2 cooperates with the second via hole 301 located on the isolation structure 3 to provide a water vapor discharge channel for the substrate 1 below, so as to quickly discharge the water vapor generated by the substrate 1 due to the high temperature process in the subsequent display panel 10 manufacturing process.

[0068] In this embodiment, the display panel 10 further includes a first electrode layer 4, which is made of a conductive material and is located between the substrate 1 and the pixel definition layer 2. Since a plurality of independently arranged pixel units are provided on the display panel 10, in order to realize the separate power supply to each of the above pixel units, the first electrode layer 4 includes at least two first electrode blocks 41 arranged at intervals. In the display area of ​​the display panel 10, the number of the above first electrode blocks 41 is consistent with the number of pixel units and is arranged one-to-one.

[0069] The first electrode layer 4 composed of a plurality of first electrode blocks 41 is located between the substrate 1 and the pixel definition layer 2. The pixel definition layer 2 is arranged on the side of the first electrode layer 4 facing away from the substrate 1. When the substrate 1 releases water vapor, in order to reduce the probability of poor film peeling between the substrate 1 and the first electrode layer 4, the orthographic projection of the first via 201 formed on the pixel definition layer 2 on the substrate 1 and the orthographic projection of the first electrode block 41 on the substrate 1 are arranged alternately.

[0070] At this time, the above-mentioned first via hole 201 can cooperate with the second via hole 301 to form a venting opening K to achieve the discharge of water vapor formed between the substrate 1 and the first electrode layer 4, thereby reducing the pressure between the film layers to avoid the defect of peeling off between the substrate 1 and the first electrode layer 4 during the production process of the display panel 10, thereby improving the reliability of the display panel 10.

[0071] In order to prevent the venting openings K from interfering with the first electrode block 41, the venting openings K formed by the first vias 201 and the second vias 301 must be arranged alternately with the first electrode block 41. The orthographic projection of the first vias 201 on the substrate 1 does not intersect with the orthographic projection of the first electrode block 41 on the substrate 1, and a certain distance is left between the two to ensure that the first electrode block 41 is not exposed through the venting openings K.

[0072] In actual processing, the orthographic projection of the first via hole 201 on the substrate 1 can be set between the orthographic projections of two adjacent first electrode blocks 41 on the substrate 1. The area where the first electrode layer 4 is distributed is set as the display area. In other embodiments, at least one first via hole 201 can also be set outside the display area. In this case, the orthographic projection of the first via hole 201 on the substrate 1 is arranged at intervals with the orthographic projection of the first electrode block 41 on the substrate 1 near the edge of the display area. Of course, the number of first via holes 201 located outside the display area can also be set to be multiple and arranged around the display area.

[0073] In some embodiments, the number of the first electrode blocks 41 is plural and they are arranged on the substrate 1 according to the design requirements. On the basis of ensuring that the overall strength and use effect of the display panel 10 are not affected, the venting opening K can be used as a water vapor discharge channel of the substrate 1 in the display panel 10. In actual arrangement, in the thickness direction of the display panel 10, the venting opening K formed by the first via hole 201 and the second via hole 301 is located between two adjacent first electrode blocks 41.

[0074] In some embodiments, there are multiple venting openings K, which are evenly arranged on the display panel 10 according to a certain rule.

[0075] Specifically, the above-mentioned venting openings K may be formed between any two adjacent first electrode blocks 41; or, the display area of ​​the display panel 10 may be divided into a plurality of different areas according to a certain rule or requirement, and a certain amount of venting openings K may be provided in each area. For example, the display area of ​​the display panel 10 may be divided into a plurality of areas according to the area, and one, two or even more venting openings K may be provided in each area. In this case, venting openings K may be provided between some adjacent first electrode blocks 41 in the area, and no venting openings K may be provided between some adjacent first electrode blocks 41. A fixed number of first electrode blocks 41 may also be provided to correspond to a fixed number of pixel openings 202, for example, three adjacent first electrode blocks 41 may be provided to correspond to one venting opening K, etc.

[0076] See also Figure 1-Figure 2 , Figure 1 This is a schematic diagram of the planar structure of the display panel 10 provided in an embodiment of the present application. Figure 2 FIG. 1 is a schematic diagram of a pixel unit arrangement in a certain embodiment. Figure 2 In the embodiment, two pixel units are arranged to correspond to one air release opening K, wherein the air release opening K is arranged between two adjacent pixel units. Of course, the luminous colors and corresponding sizes of the above-mentioned pixel units are only for illustration. In other embodiments, the arrangement and size of the above-mentioned pixel units can be adaptively adjusted according to actual needs.

[0077] The pixel unit is disposed on the display panel 10 via an isolation structure 3 .

[0078] In some embodiments, a pixel opening 202 is formed on the pixel definition layer 2 , and an isolation opening 302 is formed on the isolation structure 3 . The pixel opening 202 and the isolation opening 302 are arranged correspondingly and are interconnected.

[0079] Specifically, a portion of the structure of the first electrode block 41 is exposed relative to the isolation opening 302 through the pixel opening 202 , so as to be electrically connected to the pixel unit located in the isolation opening 302 .

[0080] The orthographic projection of the vent opening K on the substrate 1 is staggered from the orthographic projection of the isolation opening 302 on the substrate 1 , so as to avoid the vent opening K affecting the use of the pixel unit located in the isolation opening 302 .

[0081] Also, see Figure 3 , the orthographic projection of the pixel opening 202 on the substrate 1 is located within the orthographic projection of the corresponding isolation opening 302 on the substrate 1 .

[0082] Considering the display effect of the display panel 10 , the size of the isolation opening 302 is larger than the size of the venting opening K.

[0083] Specifically, the size of the pixel opening 202 is larger than the size of the first via hole 201, and the size of the isolation opening 302 is larger than the size of the second via hole 301. In actual processing, the opening size of the first via hole 201 can be set to not exceed 1 / 10 of the opening size of the pixel opening 202, so as to provide a channel for discharging water vapor for the substrate without affecting the overall strength and use effect of the display panel 10.

[0084] In some embodiments, the above-mentioned venting opening K is a circular hole or a structure similar to a circular hole. Figure 2 .

[0085] See also Figure 3-Figure 4 The display panel 10 further includes a filling unit 5 and an encapsulation layer 6 . The filling unit 5 is at least partially located in the isolation opening 302 , and the encapsulation layer 6 is located on a side of the filling unit 5 facing away from the substrate 1 .

[0086] The above-mentioned pixel unit is composed of a filling unit 5 and an encapsulation layer 6 located in the isolation opening 302. Under the action of the isolation structure 3 and the isolation opening 302, the filling unit 5 used to realize the light-emitting function is isolated during evaporation, so that the pixel units located in each isolation opening 302 can remain independent of each other, avoiding the problem of lateral conduction between each pixel unit. Of course, part of the filling unit 5 will fall into the side of the isolation structure 3 facing away from the substrate during the evaporation process, and into the degassing opening K opened on the isolation structure 3, and fill the end of the degassing opening K facing the substrate 1. The encapsulation layer 6 can extend toward the isolation opening 302 through the surface of the side of the isolation structure 3 facing away from the substrate 1 and cover the filling layer located in the isolation opening 302 to realize the encapsulation of the above-mentioned pixel unit; at the same time, the above-mentioned encapsulation layer 6 can also cover the filling unit 5 located on the side of the isolation structure 3 facing away from the substrate 1, and cover the filling unit 5 located in the degassing opening K.

[0087] Since the evaporation process of the filling unit 5 is located after the high-temperature process, the filling unit 5 filled in the venting opening K during the evaporation process will not hinder the release of water vapor in the substrate 1; accordingly, the filling unit 5 can also provide certain protection for the substrate 1 by covering the substrate 1, thereby preventing the substrate 1 from being partially exposed in the subsequent etching process.

[0088] The filling unit 5 covering the substrate 1 can prevent the substrate 1 from being damaged during the etching process, reduce the risk of corrosion failure of the related film layer located in the substrate 1, help avoid dark spot failures of the display panel 10, and help improve the reliability of the display panel 10.

[0089] Specifically, the filling unit 5 includes a light-emitting film layer 51 and a second electrode layer 52 stacked in sequence, and the second electrode layer 52 is located on a side of the light-emitting film layer 51 facing away from the substrate 1 .

[0090] The light-emitting film layer 51 and the second electrode layer 52 can be prepared in sequence by evaporation, wherein the light-emitting film layer 51 located in the isolation opening 302 can be connected to the corresponding first electrode block 41 through the pixel opening 202, and the second electrode layer 52 is stacked on the side of the light-emitting film layer 51 facing away from the first electrode layer 4.

[0091] The second electrode layer 52 located in the isolation opening 302 is electrically connected to the side wall of the isolation structure 3 facing the isolation opening 302. Figure 3 There is a gap between the light-emitting film layer 51 and the side wall of the isolation structure 3 to avoid leakage defects; the second electrode layer 52 can be connected to the side wall of the isolation structure 3 facing the isolation opening 302.

[0092] Specifically, the second electrode layer 52 can overlap with the side wall of the isolation structure 3 at one end close to the substrate 1 , or the second electrode layer 52 can overlap with the side wall in the middle of the isolation structure 3 .

[0093] In some embodiments, the isolation structure 3 includes a crown portion 32 and a support portion 31 stacked in sequence, and the crown portion 32 is located on a side of the support portion 31 facing away from the substrate 1 .

[0094] Specifically, the orthographic projection of the support portion 31 on the base 1 is located within the orthographic projection range of the crown portion 32 on the base 1 .

[0095] The side walls of the isolation structure 3 facing the isolation opening 302 and the venting opening K both present a structure similar to an eave.

[0096] In some embodiments, the isolation structure 3 further includes a root portion 33 , the support portion 31 is located on a side of the root portion 33 facing away from the substrate 1 , and an orthographic projection of the root portion 33 on the substrate 1 is within the orthographic projection range of the crown portion 32 on the substrate 1 .

[0097] Specifically, the orthographic projection of the support portion 31 on the base 1 is within the orthographic projection range of the root portion 33 on the base 1. Of course, in other similar embodiments, the size and projection relationship between the root portion 33, the crown portion 32 and the support portion 31 can also be adaptively adjusted according to actual processing needs.

[0098] The side wall of the root portion 33 facing the isolation opening 302 or the second via hole 301 is defined as the first side wall, and the side wall of the support portion 31 facing the isolation opening 302 or the second via hole 301 is defined as the second side wall. In some embodiments, the second side wall is offset relative to the first side wall toward a side away from the isolation opening 302 or the second via hole 301, so that the side wall of the isolation structure 3 has a cross-sectional structure similar to an eaves shape.

[0099] In some embodiments, the orthographic projection of the root 33 on the substrate 1 does not coincide with the orthographic projection of the first via 201 on the substrate 1 .

[0100] The isolation structure 3 having a plurality of isolation openings 302 and vent openings K extends continuously between each pixel unit and presents a mesh structure. The isolation structure 3 and the vent openings K are arranged at intervals on the isolation structure 3, so that the section of the isolation structure 3 formed between two adjacent isolation openings 302 and between adjacent isolation openings 302 and vent openings K is a nearly columnar structure. In addition, the isolation structure 3 composed of the crown portion 32, the support portion 31 and the root portion 33 presents a "wide at the top and narrow at the bottom" shape in the cross section as a whole.

[0101] In some embodiments, the root portion 33 and the crown portion 32 are shaped like a rectangle or a trapezoid in cross section, and the support portion 31 is shaped like a trapezoid in cross section.

[0102] In some embodiments, the root portion 33, the support portion 31 and the crown portion 32 may be an integrally formed structure, or may be formed by stacking different materials.

[0103] Specifically, the crown portion 32 is made of metal titanium, which is a titanium metal layer; the support portion 31 is made of metal aluminum, which is an aluminum metal layer; and the root portion 33 is made of metal molybdenum, which is a molybdenum metal layer.

[0104] Specifically, the luminescent film layer 51 can be made of organic small molecule luminescent materials, complex luminescent materials, and high molecular polymers. Different luminescent film layers 51 can be used to emit light of different colors. Generally speaking, there are three luminescent film layers 51, which are used to emit red, green, and blue light, respectively.

[0105] The preparation and processing methods of the first electrode layer 4, the second electrode layer 52 and the light-emitting film layer 51 are prior arts and will not be described in detail herein.

[0106] In some embodiments, the first electrode layer 4 can be an anode layer, the first electrode block 41 is an anode block, and the second electrode layer 52 can be a cathode layer; of course, the second electrode layer 52 can also be adjusted to be an anode layer as needed, in which case the first electrode layer 4 is a cathode layer, and the first electrode block 41 is a cathode block.

[0107] The structure of the encapsulation layer 6 is further described below:

[0108] The encapsulation layer 6 includes a first encapsulation portion 61 and a second encapsulation portion 62. The first encapsulation portion 61 is located in the isolation opening 302, and the second encapsulation portion 62 is located on the side of the isolation structure 3 facing away from the substrate 1. On the isolation structure 3 with the degassing opening K, the encapsulation layer 6 also includes a third encapsulation portion 63, and the third encapsulation portion 63 is located in the degassing opening K.

[0109] Specifically, a filling unit 5 is disposed in the degassing opening K, and the filling unit 5 is located between at least a portion of the third packaging portion 63 and the substrate 1 .

[0110] In some embodiments, at least a portion of the third encapsulation portion 63 is connected to the second encapsulation portion 62 .

[0111] The third packaging portion 63 is provided on the side of the filling unit 5 filled in the degassing opening K facing away from the substrate 1 , so as to realize packaging of the filling unit 5 .

[0112] Specifically, the third packaging portion 63 located in the at least one venting opening K may be a continuous film layer structure. In this case, the third packaging portion 63 is connected to the second packaging portion 62 .

[0113] In other embodiments, the third packaging portion 63 located in at least one venting opening K is a disconnected discontinuous film layer. In this case, the third packaging portion 63 includes a third packaging portion one for connecting to the second packaging portion 62 and a third packaging portion two for covering the filling unit 5. The third packaging portion one and the third packaging portion two are both located in the same venting opening K and are in a disconnected state.

[0114] In order to facilitate the packaging and protection of the venting opening K by the third packaging part 63, the cross-section of the above-mentioned second via 301 can present a structure similar to an eaves; of course, in other similar embodiments, the above-mentioned first side wall and the second side wall facing the second via 301 can also be arranged to be located on the same plane, and at this time, the second via 301 has a smooth inner wall, and its cross-section can present a structure similar to a regular trapezoid; or, the above-mentioned second via 301 formed by the first side wall and the second side wall can also be arranged as a cylindrical hole, and at this time, the cross-section of the second via 301 is a rectangular structure.

[0115] The structure of the encapsulation layer 6 is further described below by taking the third encapsulation portion 63 as a continuous film layer connected to the second encapsulation portion 62 as an example.

[0116] See also Figure 3 In some embodiments, a filling unit 5 is provided between at least one second packaging portion 62 and an end surface of an adjacent isolation structure 3 facing away from the substrate 1 .

[0117] After the filling unit 5 is evaporated and the encapsulation layer 6 is prepared, the filling unit 5 and the encapsulation layer 6 can be patterned by etching or other processes to remove the film layer with the wrong arrangement position. After multiple etching processes, multiple pixel units with different luminous colors are finally obtained.

[0118] In some embodiments, since the second packaging portion 62 located on the side of the isolation structure 3 facing the venting opening K is respectively connected to the first packaging portion 61 and the third packaging portion 63 on two opposite sides in the circumferential direction, the above-mentioned filling unit 5 is provided between the second packaging portion 62 and an end surface of the adjacent isolation structure 3 facing away from the substrate 1.

[0119] In some embodiments, the second packaging portion 62 located on the side of the isolation structure 3 facing away from the venting opening K is connected to the first packaging portion 61 located in the isolation opening 302 on one side in the circumferential direction, and is disconnected on the other side during the device patterning process.

[0120] Specifically, during the patterning process, if a dry etching process is used for etching, a filling unit 5 can be provided between the second packaging part 62 located on the side of the isolation structure 3 facing away from the venting opening K and the end surface of the adjacent isolation structure 3 facing away from the substrate 1; if a wet etching process is used for etching, the filling unit 5 located between the second packaging part 62 not connected to the third packaging part 63 and the adjacent isolation structure 3 will be etched away. At this time, the second packaging part 62 is suspended relative to the isolation structure 3, and there is a certain gap between the second packaging part 62 and the end surface of the isolation structure 3 facing away from the substrate 1.

[0121] The selection of the above etching process can be adaptively adjusted according to the manufacturing process requirements of the display panel 10 .

[0122] The filling unit 5 partially located on the side of the isolation structure 3 facing away from the substrate 1 can provide a certain support force to the first packaging part 61 located in the isolation opening 302 and the third packaging part 63 located in the venting opening K by being stacked with the second packaging part 62. For the first packaging part 61 located in the isolation opening 302, the second packaging part 62 stacked with the filling unit 5 can provide a good support force to reduce the possibility of cracks at the connection between the second packaging part 62 and the first packaging part 61, which can improve the reliability of the display panel 10 to a certain extent and improve the dark spot failure of the display panel 10.

[0123] See also Figure 4 The third packaging part 63 includes a first packaging sub-part 631 and a second packaging sub-part 632 . The first packaging sub-part 631 covers the side wall of the venting opening K, and the second packaging sub-part 632 is located on the side of the filling unit 5 facing away from the substrate 1 and is connected to at least part of the first packaging sub-part 631 .

[0124] The second encapsulation sub-portion 632 is stacked on the side of the filling unit 5 facing away from the substrate 1. One end of the first encapsulation sub-portion 631 extending into the degassing opening K is connected to the second encapsulation sub-portion 632, and the other end is connected to the second encapsulation portion 62, so that the encapsulation layer 6 can effectively encapsulate the degassing opening K and the filling unit 5 located therein.

[0125] It should be noted that the third packaging part 63 can package the filling unit 5 in the degassing opening K. Since the preparation process of the third packaging part 63 is located after the high-temperature process, it will not affect the discharge of water vapor in the substrate 1 through the degassing opening K; at the same time, the third packaging part 63 can cooperate with the filling unit 5 located in the degassing opening K to effectively protect the substrate 1 located below the degassing opening K, thereby preventing the substrate 1 from being damaged in the subsequent etching process.

[0126] In another embodiment, see Figure 4, the number of the third encapsulation parts 63 located in the degassing opening K is two and they are sequentially stacked in the degassing opening K, and / or, the number of the second encapsulation parts 62 connected to the third encapsulation parts 63 is two and they are sequentially stacked on the side of the isolation structure 3 facing away from the substrate 1. Similarly, a filling unit 5 is provided between the two stacked layers of the third encapsulation parts 63, and a filling unit 5 is also provided between the two stacked layers of the second encapsulation parts 62.

[0127] Therefore, in some embodiments, at least two layers of filling units 5 are stacked in at least one venting opening K; and / or at least two layers of filling units 5 are stacked between at least one second packaging portion 62 and an end surface of an adjacent isolation structure 3 facing away from the substrate 1 .

[0128] Specifically, three layers of filling units 5 are stacked in at least one venting opening K; and / or three layers of filling units 5 are stacked between at least one second packaging portion 62 and an end surface of an adjacent isolation structure 3 facing away from the substrate 1 .

[0129] It should be noted that, in the various filling units 5 stacked in the same venting opening K, the luminescent film layer 51 in each filling unit 5 is made of different materials, so different filling units 5 have different emission colors under power-on conditions.

[0130] The above-mentioned filling unit 5 and the packaging part can enhance the packaging effect of the venting opening K, and further improve the connection firmness between the second packaging part 62 located on the side of the isolation structure 3 facing away from the substrate 1 and the first packaging part 61 located in the isolation opening 302, so as to improve the packaging effect to a certain extent. In addition, part of the third packaging part 63 (for example, the first packaging sub-part 631) and part of the second packaging part 62 will directly contact and form a fixedly connected film layer structure. At this time, part of the filling unit 5 can be wrapped in the packaging layer 6, please refer to Figure 4 .

[0131] In order to avoid affecting the packaging effect of the third packaging part 63 on the vent opening K due to the shape of the vent opening K, when processing the above-mentioned vent opening K, it can be considered to select the first via 201 and the pixel opening 202 to be prepared in the same processing process, and the second via 301 and the isolation opening 302 to be prepared in the same processing process, and make the first via 201 and the second via 301 finally prepared be arranged opposite to each other.

[0132] Generally speaking, it should be ensured that the orthographic projection of the first via 201 on the substrate 1 falls within the range of the orthographic projection of the second via 301 on the substrate 1 or the two projections coincide with each other (for example, the outer contour of the orthographic projection of the first via 201 on the substrate 1 coincides with the outer contour of the orthographic projection of the end of the second via 301 facing the substrate 1 on the substrate 1). At this time, the first via 201 can be completely exposed relative to the second via 301, so that the connection between the first via 201 and the second via 301 is a smooth surface or relatively smooth, which helps to ensure that the third packaging portion 63 falling into the venting opening K formed by the first via 201 and the second via 301 can maintain normal extension and not open, thereby meeting the packaging requirements.

[0133] In other similar embodiments of the present application, the venting opening K has a variety of different arrangements, see Figure 2 and Figure 5 .

[0134] and Figure 2 In comparison, Figure 5 In the embodiment, three adjacent first electrode blocks 41 correspond to one venting opening K, that is, three adjacent pixel units correspond to one venting opening K.

[0135] Specifically, when three pixel units are arranged in sequence along a straight line, the vent opening K may be located between two adjacent pixel units. Figure 5 Alternatively, the vent opening K may be arranged at one end of the pixel unit in the arrangement direction; when the three pixel units are arranged in a ring shape, the vent opening K may be arranged between the three pixel units.

[0136] After the encapsulation layer 6 is used to encapsulate the isolation opening 302 and the venting opening K, other film structures need to be provided on the side of the encapsulation layer 6 facing away from the substrate 1 to further planarize and encapsulate the display panel 10 .

[0137] Specifically, the side of the encapsulation layer 6 facing away from the substrate 1 is further provided with at least one film layer structure selected from the group consisting of a planarization layer, an organic encapsulation layer, an inorganic encapsulation layer, a touch layer, an organic adhesive layer, and a cover plate.

[0138] Taking the planarization layer as an example, the material of the planarization layer may include at least one of an organic material and an inorganic material, for example, an organic polymer (such as polyimide, acrylic resin, etc.) or an inorganic material (such as silicon oxide, silicon nitride, etc.).

[0139] The planarization layer made of organic material can be prepared by IJP (Ink-Jet Printing, inkjet printing technology). Part of the planarization layer can flow into the isolation opening 302 and the venting opening K, and improve the flatness of the display panel 10 by filling the isolation opening 302 and the venting opening K, while also providing certain protection for the related film layers located therebelow.

[0140] It can be understood that the display panel 10 provided in the embodiment of the present application can directly discharge the water vapor and the like generated by the substrate 1 in the high-temperature process through the venting opening K penetrating the above-mentioned pixel definition layer 2 and the isolation structure 3, so as to prevent the residual water vapor from causing poor peeling and bubbling between the film layers, reduce the possibility of water and oxygen erosion of the display panel 10 due to the above-mentioned defects, and optimize the display effect of the display panel 10 to a certain extent; when the first electrode layer 4 is provided between the substrate 1 and the pixel definition layer 2, the above-mentioned venting opening K can avoid the setting of the first electrode block 41, and effectively reduce the probability of poor film peeling between the substrate 1 and the first electrode block 41 without affecting the normal function of the first electrode block 41; the filling unit 5 and the encapsulation layer 6 located in the above-mentioned venting opening K are used to provide better protection for the substrate 1 located below the venting opening K, avoid damage to the substrate 1 in subsequent processes, further improve the reliability and durability of the display panel 10, and make the display panel 10 have a longer service life.

[0141] In the second aspect, the present application provides a display panel 10, including a substrate 1, a first electrode layer 4, a pixel definition layer 2 and an isolation structure 3, wherein the first electrode layer 4 is located on the substrate 1, and includes at least two first electrode blocks 41 arranged at intervals; the pixel definition layer 2 is located on the side of the first electrode layer 4 facing away from the substrate 1, and the pixel definition layer 2 is provided with first via holes 201 and pixel openings 202 arranged at intervals, and the orthographic projection of the first electrode block 41 on the substrate 1 and the orthographic projection of the first via hole 201 on the substrate 1 are arranged at intervals; the isolation structure 3 is located on the side of the pixel definition layer 2 facing away from the substrate 1, and the isolation structure 3 is provided with second via holes 301 and isolation openings 302 arranged at intervals; wherein the first via holes 201 and the second via holes 301 are interconnected and constitute a venting opening K, and the pixel opening 202 and the isolation opening 302 are interconnected.

[0142] The display panel 10 can reduce the possibility of poor peeling and poor bubbling through the venting opening K formed by the first via hole 201 and the second via hole 301, improve the yield of the display panel 10, and enhance the reliability and use effect of the display panel. The specific principle can be found in the relevant description of the aforementioned embodiment and will not be elaborated here.

[0143] Specifically, the pixel opening 202 and the isolation opening 302 are interconnected and can be used to accommodate the filling unit 5 that can emit light when powered on. Similarly, the venting opening K formed by the first via hole 201 and the second via hole 301 can also be used to accommodate the filling unit.

[0144] In a third aspect, the present application further provides a display device 100, see Figure 6 The display device 100 includes any one of the display panels 10 described above.

[0145] The display device 100 provided in this embodiment can be a product or component with a display function such as a mobile phone, a notebook, a tablet computer, a smart watch, a smart bracelet, a navigator, a display, a personal digital assistant (PDA), etc. Since the display device 100 provided in the embodiment of the present application includes the above-mentioned display panel 10, the display device 100 at least includes the beneficial effects of any one or more of the above-mentioned display panels 10. The specific effects refer to the specific description in the above-mentioned embodiments, which will not be repeated here.

[0146] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: substrate; A pixel definition layer is located on the substrate, and a first through hole is formed on the pixel definition layer; An isolation structure, located on a side of the pixel definition layer facing away from the substrate, and a second via hole is formed on the isolation structure; Wherein, the first via hole and the second via hole are interconnected and constitute a venting opening.

2. The display panel according to claim 1, characterized in that: The display panel further includes a first electrode layer, the first electrode layer is located between the substrate and the pixel definition layer, and the first electrode layer includes at least two first electrode blocks arranged at intervals; The orthographic projection of the first via hole on the substrate and the orthographic projection of the first electrode block on the substrate are arranged alternately.

3. The display panel according to claim 2, characterized in that: An orthographic projection of any one of the first via holes on the substrate is located between orthographic projections of two adjacent first electrode blocks on the substrate.

4. The display panel according to claim 1, characterized in that: The orthographic projection of the first via hole on the substrate is within the range of the orthographic projection of the second via hole on the substrate; Alternatively, an orthographic projection outer contour of the first via hole on the substrate coincides with an orthographic projection outer contour of an end of the second via hole facing the substrate on the substrate.

5. The display panel according to claim 2, characterized in that: The pixel definition layer is provided with a pixel opening, the isolation structure is provided with an isolation opening, and the pixel opening and the isolation opening are arranged correspondingly and are interconnected; Preferably, part of the first electrode block is exposed relative to the isolation opening through the pixel opening; Preferably, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the correspondingly arranged isolation opening on the substrate.

6. The display panel according to claim 5, characterized in that: The display panel further includes a filling unit and an encapsulation layer. The filling unit is at least partially located in the isolation opening, and the encapsulation layer is located on a side of the filling unit that is away from the substrate.

7. The display panel according to claim 6, characterized in that: The encapsulation layer includes a first encapsulation portion and a second encapsulation portion, wherein the first encapsulation portion is located in the isolation opening, and the second encapsulation portion is located on a side of the isolation structure facing away from the substrate.

8. The display panel according to claim 7, characterized in that: The encapsulation layer further comprises a third encapsulation portion located in the degassing opening, the filling unit is arranged in the degassing opening, and the filling unit is located between at least a portion of the third encapsulation portion and the substrate; Preferably, at least a portion of the third encapsulation portion is connected to the second encapsulation portion.

9. The display panel according to claim 8, characterized in that: The filling unit is disposed between at least one of the second packaging parts and an end surface of the adjacent isolation structure facing away from the substrate.

10. The display panel according to claim 9, characterized in that: At least two layers of the filling units are stacked between at least one of the second packaging parts and an end surface of the adjacent isolation structure facing away from the substrate.

11. The display panel according to claim 8, characterized in that: The third encapsulation part includes a first encapsulation sub-part and a second encapsulation sub-part, the first encapsulation sub-part covers the side wall of the degassing opening, and the second encapsulation sub-part is located on a side of the filling unit facing away from the substrate and connected to at least part of the first encapsulation sub-part.

12. The display panel according to claim 8, characterized in that: At least two layers of the filling units are stacked in at least part of the air release openings; Preferably, different filling units stacked in the same air release opening have different colors of emitted light under power-on conditions.

13. The display panel according to claim 8, characterized in that: A portion of the second packaging portion is spaced apart from an end surface of the adjacent isolation structure facing away from the substrate.

14. The display panel according to any one of claims 6 to 13, characterized in that: The filling unit comprises a light-emitting film layer and a second electrode layer stacked in sequence, wherein the second electrode layer is located on a side of the light-emitting film layer facing away from the substrate; Preferably, the first electrode layer is an anode layer, the first electrode block is an anode block, and the second electrode layer is a cathode layer.

15. The display panel according to claim 14, characterized in that: The light-emitting film layer located in the isolation opening is connected to the first electrode block through the pixel opening; The second electrode layer located in the isolation opening is electrically connected to a side wall of the isolation structure facing the isolation opening.

16. The display panel according to claim 1, characterized in that: The isolation structure comprises a supporting portion and a crown portion stacked in sequence, wherein the crown portion is located on a side of the supporting portion facing away from the base; The orthographic projection of the support portion on the base is located within the orthographic projection range of the crown portion on the base.

17. The display panel according to claim 16, characterized in that: The isolation structure further includes a root portion, the support portion is located on a side of the root portion facing away from the base, and the orthographic projection of the root portion on the base is located within the orthographic projection range of the crown portion on the base; And / or, the orthographic projection of the support portion on the substrate is located within the orthographic projection range of the root portion on the substrate; And / or, an orthographic projection of the root on the substrate does not overlap with an orthographic projection of the first via on the substrate.

18. The display panel according to claim 1, characterized in that: The number of the air release openings is multiple and they are evenly arranged on the display panel.

19. A display panel, characterized in that: include: substrate; A first electrode layer, located on the substrate, the first electrode layer comprising at least two first electrode blocks arranged at intervals; a pixel definition layer, located on a side of the first electrode layer facing away from the substrate, the pixel definition layer being provided with first via holes and pixel openings arranged at intervals, and an orthographic projection of the first electrode block on the substrate and an orthographic projection of the first via hole on the substrate being arranged at intervals; An isolation structure, located on a side of the pixel definition layer facing away from the substrate, the isolation structure being provided with second via holes and isolation openings arranged at intervals; The first via hole and the second via hole are interconnected and constitute a venting opening, and the pixel opening and the isolation opening are interconnected.

20. A display device, characterized in that: A display panel comprising any one of claims 1-19.

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