Display panel and display device

Abstract

The embodiment of the invention provides a display panel and a display device, and the display panel comprises a substrate; the insulating layer is arranged on one side of the substrate, and the insulating layer comprises a limiting part and a first opening defined by the limiting part; the light-emitting functional layer comprises a light-emitting unit limited in the first opening; the first electrode layer is arranged on the side, facing the substrate, of the light-emitting functional layer, and the first electrode layer comprises a plurality of first electrodes; the sealing layer is arranged on the side, facing the substrate, of the first electrode layer, and the orthographic projection of the sealing layer on the substrate covers the orthographic projection of the first electrode layer on the substrate. The sealing layer is arranged below the first electrode layer, and the orthographic projection of the sealing layer on the substrate covers the orthographic projection of the first electrode layer on the substrate, so that water vapor generated by a wet etching process is prevented from intruding into the light-emitting functional layer in the preparation process of the display panel, the packaging effect of the first electrode layer is improved, the display effect of the display panel is ensured, and the display effect of the display panel is improved. Dark spots are avoided, and the use performance of the display panel is improved.

Description

TECHNICAL FIELD

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

[0002] Organic light emitting diode (OLED) and flat display devices based on light emitting diode (LED) technology have been widely applied to mobile phones, televisions, notebook computers, desktop computers and other consumer electronic products due to their high image quality, power saving, thin body and wide application range, and have become the mainstream of display devices.

[0003] However, the use performance of the current OLED display product needs to be improved. SUMMARY

[0004] Embodiments of the present application provide a display panel and a display device, aiming to improve the use performance of the display panel.

[0005] An embodiment of one aspect of the present application provides a display panel, comprising: a substrate; an insulating layer provided on one side of the substrate, the insulating layer comprising a limiting portion and a first opening formed by the limiting portion; a light emitting functional layer comprising a light emitting unit limited in the first opening; a first electrode layer provided on a side of the light emitting functional layer facing the substrate, the first electrode layer comprising a plurality of first electrodes; and a sealing layer provided on a side of the first electrode layer facing the substrate, a normal projection of the sealing layer on the substrate covering a normal projection of the first electrode layer on the substrate.

[0006] According to any one of the embodiments of one aspect of the present application, in a direction parallel to the plane where the substrate is located, the first electrode comprises a first end portion, a normal projection of the first end portion on the substrate being located in an overlapping part of a normal projection of the insulating layer on the substrate and a normal projection of the sealing layer on the substrate; preferably, the first electrode comprises a first side surface located at the first end portion, a normal projection of the first side surface on the substrate being located in the overlapping part of the normal projection of the insulating layer on the substrate and the normal projection of the sealing layer on the substrate.

[0007] According to any one of the embodiments of one aspect of the present application, the material of the sealing layer comprises an inorganic material; preferably, the material of the sealing layer comprises at least one of silicon nitride, silicon oxide and silicon oxynitride.

[0008] According to any one of the embodiments of one aspect of the present application, the material of the insulating layer comprises an inorganic material; preferably, the material of the insulating layer comprises at least one of silicon nitride, silicon oxide and silicon oxynitride.

[0009] According to any one of the embodiments of the aspect of the present application, the sealing layer is disposed in an integral layer, and a projection of the plurality of first electrodes on the substrate is located within a projection of the insulating layer on the substrate.

[0010] According to any one of the embodiments of the aspect of the present application, the sealing layer comprises a plurality of sealing portions arranged at intervals and corresponding to the first electrodes one by one; a projection of the sealing portion on the substrate covers a projection of the corresponding first electrode on the substrate.

[0011] According to any one of the embodiments of the aspect of the present application, a distance between an edge of a projection of the first electrode on the substrate and an edge of a projection of the sealing portion on the substrate is greater than or equal to 2 μm.

[0012] According to any one of the embodiments of the aspect of the present application, the sealing portion comprises a second end portion in a direction parallel to a plane on which the substrate is located, and the second end portion is connected to the insulating layer.

[0013] According to any one of the embodiments of the aspect of the present application, the display panel further comprises an isolation structure disposed on a side of the insulating layer away from the substrate, the isolation structure is enclosed to form a plurality of isolation openings and has a mesh structure; in a direction perpendicular to a plane on which the substrate is located, the first end portion and the isolation structure partially overlap; preferably, in the direction perpendicular to the plane on which the substrate is located, the second end portion and the isolation structure partially overlap; preferably, a projection of the first side on the substrate is located within a projection of the isolation structure on the substrate; preferably, the sealing portion comprises a second side located at the second end portion, a projection of the second side on the substrate is located within a projection of the isolation structure on the substrate; preferably, the sealing layer comprises a via hole, and the first electrode extends into the via hole; preferably, a projection of the via hole on the substrate is located within a projection of the isolation structure on the substrate.

[0014] According to any one of the embodiments of the aspect of the present application, the isolation structure comprises a first sub-layer and a second sub-layer arranged in a stack in a direction away from the substrate, a projection of the first sub-layer on the substrate is located within a projection of the second sub-layer on the substrate; preferably, a material of the isolation structure comprises a conductive material, a second electrode layer is disposed on a side of the light-emitting unit away from the substrate, the second electrode layer is electrically connected to the isolation structure; preferably, the limiting portion comprises an inorganic material; preferably, the isolation structure is located on a side of the limiting portion away from the substrate.

[0015] According to any one of the embodiments of the aspect of the application, the display panel further comprises a first planarization layer, the first planarization layer is at least partially disposed on a side of the sealing layer away from the first electrode layer.

[0016] According to any one of the embodiments of the aspect of the application, the display panel further comprises a first planarization layer, the first planarization layer is at least partially disposed on a side of the sealing layer away from the first electrode layer.

[0017] According to any one of the embodiments of the aspect of the application, the first end portion comprises a first surface away from the substrate, a second surface toward the substrate, and a first side surface connecting the first surface and the second surface; the insulating layer is attached to the first surface and the first side surface, and the sealing layer is attached to the second surface.

[0018] According to any one of the embodiments of the aspect of the application, the material of the sealing layer comprises an inorganic material; preferably, the material of the sealing layer comprises at least one of silicon nitride, silicon oxide, and silicon oxynitride.

[0019] According to any one of the embodiments of the aspect of the application, the material of the insulating layer comprises an inorganic material; preferably, the material of the insulating layer comprises at least one of silicon nitride, silicon oxide, and silicon oxynitride.

[0020] According to any one of the embodiments of the aspect of the application, the sealing layer is disposed in an integral layer.

[0021] According to any one of the embodiments of the aspect of the application, the sealing layer comprises a plurality of sealing portions arranged at intervals and corresponding to the first electrodes one by one; the orthographic projection of the sealing portion on the substrate covers the orthographic projection of the corresponding first electrode on the substrate.

[0022] According to any one of the embodiments of the aspect of the application, the display panel further comprises a first planarization layer, the first planarization layer is at least partially disposed on a side of the sealing layer away from the first electrode layer.

[0023] In the display panel provided by the embodiment of the present application, the display panel comprises a substrate, a light-emitting functional layer, an insulating layer, a first electrode layer and a sealing layer. The sealing layer is arranged below the first electrode layer, and the orthogonal projection of the sealing layer on the substrate covers the orthogonal projection of the first electrode layer on the substrate, that is, the size of the sealing layer is greater than or equal to the size of the first electrode layer, so as to block the moisture generated due to the wet etching process from invading the light-emitting functional layer in the preparation process of the display panel, improve the packaging effect of the first electrode layer, ensure the display effect of the display panel, avoid the occurrence of dark spots, and improve the use performance of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0024] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof taken in conjunction with the accompanying drawings, in which like or similar features of the drawings are referred to with like or similar reference numerals.

[0025] Figure 1 is a structural schematic diagram of a display panel provided by the embodiment of the present application;

[0026] Figure 2 is a sectional view of A-A in Figure 1

[0027] Figure 3 is a sectional view of A-A in another example Figure 1

[0028] Figure 4 is a partial enlarged structural schematic diagram of Figure 3

[0029] Figure 5 is a sectional view of A-A in another example Figure 1

[0030] BRIEF DESCRIPTION OF DRAWINGS

[0031] 100, substrate;

[0032] 200, isolation structure; 210, second sub-layer; 220, first sub-layer;

[0033] 300, light-emitting functional layer; 310, light-emitting unit;

[0034] 400, insulating layer; 410, limiting part;

[0035] 500, first electrode layer; 510, first electrode; 511, first end part;

[0036] 600, sealing layer; 610, sealing part; 611, second end part

[0037] 700, first planarization layer;​​​​

[0038] 800, the second electrode layer;

[0039] 900, the first encapsulation layer;

[0040] C1, the first side surface; C2, the second side surface; F1, the first surface; F2, the second surface; K1, the isolation opening; K2, the first opening; K3, the via; S, the source electrode; D, the drain electrode; G, the gate electrode; Y, the channel region. DETAILED DESCRIPTION

[0041] The features and exemplary embodiments of various aspects of the present application will be described in detail below.

[0042] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is more than two; the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In the process of implementing the present application, the inventors found that in the related art, in the preparation process of the display panel, the wet etching process for forming the light emitting functional layer may cause cracks in the first electrode layer, and the moisture in the first planarization layer under the first electrode layer invades the light emitting layer, resulting in pixel encapsulation failure.

[0044] In order to solve the above problems, the embodiments of the present application set a sealing layer below the first electrode layer to block the moisture generated by the wet etching process from invading the light emitting functional layer during the preparation process of the display panel, and the sealing layer and the insulating layer are connected, further improving the encapsulation effect of the first electrode layer, ensuring the display effect of the display panel, avoiding the appearance of dark spots, and improving the use performance of the display panel.

[0045] The technical solutions of the patent applications CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, PCT / CN2024 / 099072, CN117979755A, CN117998900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, CN117396039A, CN116669480A, CN116600606A, CN117500332A are incorporated by reference into the present application for reference.

[0046] In order to better understand the present application, the following will be combined with Figures 1 to 5 The display panel and the display device of the embodiments of the present application are described in detail.

[0047] Please refer to Figures 1 to 2 , Figure 1 The structure schematic diagram of a display panel provided by the embodiments of the present application is shown in the figure. Figure 2 is Figure 1 the partial enlarged structure schematic diagram of A-A in the figure.

[0048] As Figure 1 and Figure 2 shown, the present application provides a display panel, comprising: a substrate 100; an insulating layer 400 provided on one side of the substrate 100, the insulating layer 400 comprising a limiting portion 410 and a first opening K2 formed by the limiting portion 410; a light-emitting functional layer 300 comprising a light-emitting unit limited in the first opening K2; a first electrode layer 500 provided on the side of the light-emitting functional layer 300 facing the substrate 100, the first electrode layer 500 comprising a plurality of first electrodes 510; a sealing layer 600 provided on the side of the first electrode layer 500 facing the substrate 100, the orthogonal projection of the sealing layer 600 on the substrate 100 covering the orthogonal projection of the first electrode layer 500 on the substrate 100.

[0049] The display panel provided by the embodiment of the present application comprises a substrate 100, a light-emitting functional layer 300, an insulating layer 400, a first electrode layer 500, and a sealing layer 600. The sealing layer 600 is arranged below the first electrode layer 500, and the orthogonal projection of the sealing layer 600 on the substrate 100 covers the orthogonal projection of the first electrode layer 500 on the substrate 100, i.e., the size of the sealing layer 600 is greater than or equal to the size of the first electrode layer 500, so as to block the water vapor generated in the process of preparing the display panel from invading the light-emitting functional layer 300 due to the wet etching process, improve the packaging effect of the first electrode layer 500, ensure the display effect of the display panel, avoid the occurrence of dark spots, and improve the use performance of the display panel.

[0050] In the embodiment, the sealing layer 600 is prepared by using inorganic materials, and has good water vapor blocking effect. Therefore, the sealing layer 600 is arranged on the side of the first electrode layer 500 facing the substrate 100, and the orthogonal projection of the sealing layer 600 on the substrate 100 covers the orthogonal projection of the first electrode layer 500 on the substrate, so as to block the water vapor from below in the wet etching process, avoid the water vapor from entering the light-emitting unit 310 from the cracks of the first electrode layer 500, and affect the normal light emission of the light-emitting unit 310. The orthogonal projection of the sealing layer 600 on the substrate 100 covers the orthogonal projection of the first electrode layer 500 on the substrate 100, and the size of the sealing layer 600 can be greater than the size of the first electrode layer 500, so that the side surface of the sealing layer 600 away from the substrate 100 and the side surface of the insulating layer 400 facing the substrate 100 are partially in contact with each other. While covering the first electrode layer 500, the edge of the sealing layer 600 can also be in contact with the insulating layer 400, so as to realize sealing and further improve the packaging effect.

[0051] Optionally, the substrate 100 can be arranged in various manners. The substrate 100 can comprise a substrate, a first conductive layer, a second conductive layer, and a third conductive layer arranged on one side of the substrate in a stacked manner. Insulating layers are arranged between adjacent conductive layers. For example, the substrate 100 comprises a pixel circuit. The pixel circuit comprises a transistor and a storage capacitor. The transistor comprises a channel region Y, a gate G, a source S, and a drain D. The storage capacitor comprises a first plate and a second plate. For example, the gate G and the first plate can be located on the first conductive layer, the second plate can be located on the second conductive layer, and the source S and the drain D can be located on the third conductive layer. Optionally, the substrate 100 can further comprise a fourth conductive layer located on the side of the third conductive layer away from the substrate. The fourth conductive layer can be arranged to connect a signal line.

[0052] Optionally, the display panel comprises a first electrode layer 500 and a second electrode layer 800, the first electrode layer 500 comprises a plurality of first electrodes 510 arranged at intervals, each first electrode 510 is located at a side of each light emitting unit 310 facing the substrate 100. The second electrode layer 800 comprises a plurality of second electrodes, each second electrode is located at a side of each light emitting unit 310 away from the substrate 100, the first electrode 510 and the second electrode jointly act to drive the light emitting unit 310 to emit light. One of the first electrode 510 and the second electrode is an anode, and the other is a cathode. The embodiment of the present application takes the first electrode 510 as the anode and the second electrode as the cathode as an example.

[0053] Optionally, the light emitting functional layer 300 comprises one or more of an electron injection layer, an electron transport layer, a light emitting material layer, a hole blocking layer, an electron blocking layer, a hole transport layer and a hole injection layer. The specific type of the light emitting layer can be selected according to the specific type, and there is no special limitation. The electron injection layer, the electron transport layer and the hole blocking layer can be arranged between the second electrode layer 800 and the light emitting material layer. The electron blocking layer, the hole transport layer and the hole injection layer can be arranged between the first electrode layer 500 and the light emitting material layer.

[0054] The material of the first electrode layer 500 is generally a material with high work function, so as to improve the hole injection efficiency. The material can be gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO) or transparent conductive polymer (such as polyaniline) and the like. For example, the first electrode layer 500 can be made of ITO-Ag-ITO composite material, and there is no special limitation.

[0055] The material of the second electrode layer 800 can be one of metal materials such as silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca) or indium (In), and can also be an alloy of the foregoing metal materials, such as magnesium-silver alloy (Mg / Ag) and lithium-aluminum alloy (Li / Al), which is not limited in the embodiment.

[0056] Optionally, the insulating layer 400 comprises inorganic material, for example, the material of the insulating layer 400 comprises at least one of silicon nitride, silicon oxide and silicon oxynitride.

[0057] Optionally, the material of the sealing layer 600 comprises inorganic material, for example, the material of the sealing layer 600 comprises at least one of silicon nitride, silicon oxide and silicon oxynitride, so as to ensure the water and oxygen blocking effect.

[0058] Optionally, the display panel further comprises a first planarization layer 700, the first planarization layer 700 is at least partially arranged on a side of the sealing layer 600 away from the first electrode layer 500.

[0059] Optionally, the first planarization layer 700 comprises an organic material, and the material of the first planarization layer 700 can be hexamethyl disiloxane, epoxy resin, or polyimide, or other materials, which are not limited in the embodiment.

[0060] Please refer to Figures 3 to 4 In some optional embodiments, the first electrode 510 comprises a first end portion 511, and a projection of the first end portion 511 on the substrate 100 is located in an overlapping portion of a projection of the insulating layer 400 on the substrate 100 and a projection of the sealing layer 600 on the substrate 100.

[0061] In the embodiment, the first end portion 511 refers to an edge portion of the first electrode 510 in a direction parallel to the plane where the substrate 100 is located. By limiting the projection of the first end portion 511 on the substrate 100 to be located in the overlapping portion of the projection of the insulating layer 400 on the substrate 100 and the projection of the sealing layer 600 on the substrate 100, the whole first electrode 510 is encapsulated by the sealing layer 600 and the insulating layer 400 together, so as to avoid the moisture from invading from above, below, or the first side C1 of the first electrode 510, wherein the first side C1 is located at the first end portion 511, and the first side C1 refers to a side surface connecting the upper and lower surfaces of the first end portion 511, and the extending direction of the first side C1 intersects with the plane where the substrate 100 is located.

[0062] Optionally, the projection of the first side C1 on the substrate 100 is located in the overlapping portion of the projection of the insulating layer 400 on the substrate 100 and the projection of the sealing layer 600 on the substrate 100, that is, the sealing layer 600 can be in contact with the insulating layer 400, so as to wrap the first side C1 in the space surrounded by the two layers, and further improve the encapsulation effect.

[0063] Please refer to Figure 2 In some optional embodiments, the sealing layer 600 is provided as a whole, and the projections of the plurality of first electrodes 510 on the substrate 100 are located in the projection of the insulating layer 400 on the substrate 100, that is, the sealing layer 600 is a continuous whole structure, so as to ensure that the first planarization layer 700 and the first electrode layer 500 and the insulating layer 400 are not in contact, and further improve the blocking effect of the sealing layer 600.

[0064] Please refer to Figure 3 and Figure 4 In some optional embodiments, the sealing layer 600 comprises a plurality of sealing portions 610 which are provided in a spaced manner and correspond to the first electrodes 510 one by one, and the projection of the sealing portion 610 on the substrate 100 covers the projection of the corresponding first electrode 510 on the substrate 100.

[0065] In the embodiment, the sealing layer 600 can form a plurality of sealing portions 610 arranged at intervals by a patterning process, each of the sealing portions 610 corresponds to shielding a different first electrode 510, and a normal projection of each of the sealing portions 610 on the substrate 100 covers a normal projection of the corresponding first electrode 510 on the substrate 100, that is, the size area of the sealing portion 610 is greater than or equal to the size area of the first electrode 510.

[0066] Optionally, the sealing portion 610 can be connected with the insulating layer 400, and thus the size area of the sealing portion 610 can be greater than the size area of the first electrode 510 to ensure the packaging effect.

[0067] Please refer to Figure 3 and Figure 4 In some optional embodiments, the distance a between the normal projection edge of the first electrode 510 on the substrate 100 and the normal projection edge of the sealing portion 610 on the substrate 100 is greater than or equal to 2 μm.

[0068] Since the sealing portion 610 needs to be connected with the insulating layer 400, the distance a between the normal projection edge of the first electrode 510 on the substrate 100 and the normal projection edge of the sealing portion 610 on the substrate 100 should not be too small, otherwise the overhanging part of the sealing portion 610 relative to the first electrode 510 cannot be connected with the insulating layer 400, and thus the distance a between the normal projection edge of the first electrode 510 on the substrate 100 and the normal projection edge of the sealing portion 610 on the substrate 100 is required to be greater than or equal to 2 μm.

[0069] For example, the distance a between the normal projection edge of the first electrode 510 on the substrate 100 and the normal projection edge of the sealing portion 610 on the substrate 100 is equal to any one of 2 μm, 3 μm, 4 μm, 5 μm, and 6 μm.

[0070] In some optional embodiments, in a direction parallel to the plane on which the substrate 100 is located, the sealing portion 600 includes a second end portion 611, the second end portion 611 is connected with the insulating layer 400, that is, the size of the sealing portion 600 is greater than the size of the first electrode 510 and extends outward relative to the first electrode 510, so that the second end portion 611 is connected with the insulating layer 400 to achieve the wrapping packaging of the first electrode 510 and further improve the packaging effect.

[0071] In some optional embodiments, the display panel further includes an isolation structure 200 arranged on the side of the insulating layer 400 away from the substrate 100, the isolation structure 200 forms a plurality of isolation openings and has a mesh structure; in a direction perpendicular to the plane on which the substrate 100 is located, the first end portion 511 partially overlaps the isolation structure 200, that is, the first electrode layer 500 extends to below the isolation structure 200.

[0072] In order to ensure the barrier effect of the sealing layer 600, the second end portion 611 and the isolation structure 200 partially overlap in the direction perpendicular to the plane where the substrate 100 is located, that is, the sealing layer 600 also extends to below the isolation structure 200, so as to shield the first electrode layer 500.

[0073] Optionally, the orthographic projection of the first side C1 on the substrate 100 is located in the orthographic projection of the isolation structure 200 on the substrate 100, that is, the outer side edge of the first end portion 511 extends to below the isolation structure 200.

[0074] Optionally, the sealing portion 610 includes a second side C2 of the second end portion 611, the orthographic projection of the second side C2 on the substrate 100 is located in the orthographic projection of the isolation structure 200 on the substrate 100, and the outer side edge of the second end portion 611 also extends to below the isolation structure 200, so as to ensure the packaging of the first end portion 511.

[0075] In consideration of the electrical connection of the first electrode 510 with the pixel circuit located below the sealing layer 600, optionally, the sealing layer 600 includes a via K3, and the first electrode 510 extends into the via K3, so as to be electrically connected with the pixel circuit below the sealing layer 600.

[0076] Optionally, the orthographic projection of the via K3 on the substrate 100 is located in the orthographic projection of the isolation structure 200 on the substrate 100, that is, the via K3 on the sealing layer 600 is arranged below the isolation structure 200, so as to be electrically connected with the pixel circuit.

[0077] Please refer to Figures 2 to 5 In some optional embodiments, the isolation structure 200 includes a first sub-layer 220 and a second sub-layer 210 arranged in a stack away from the substrate 100, and the orthographic projection of the first sub-layer 220 on the substrate 100 is located in the orthographic projection of the second sub-layer 210 on the substrate 100.

[0078] In these optional embodiments, the size of the first sub-layer 220 is smaller than the size of the second sub-layer 210, so that an inner recess can be formed below the second sub-layer 210. When the luminescent material layer falls on the isolation structure 200, the luminescent material layer can be broken on the side of the isolation structure 200, thereby forming the luminescent units 310 located in the respective isolation openings K1 and independent of each other, which can simplify the preparation process of the luminescent units 310.

[0079] Optionally, the material of the isolation structure 200 includes a conductive material, and the luminescent units 310 are provided with a second electrode away from the substrate 100, and the second electrode is electrically connected with the isolation structure 200. So that the plurality of second electrodes can be interconnected into a whole electrode through the isolation structure 200.

[0080] In these optional embodiments, the first opening K2 of the insulating layer 400 is in communication with the isolation opening K1, and the light emitting unit 310 is located in the first opening K2, so that sufficient space can be left in the isolation opening K1 for the light emitting unit 310.

[0081] Optionally, the isolation structure 200 is located on the side of the limiting portion 410 away from the substrate 100.

[0082] Please refer to Figures 2 to 5 In some optional embodiments, the display panel further comprises a first encapsulation layer 900, the first encapsulation layer 900 is located on the side of the light emitting functional layer 300 away from the substrate 100, and the material of the first encapsulation layer 900 comprises inorganic material.

[0083] It can be understood that the first encapsulation layer 900 is used for encapsulating and protecting the light emitting functional layer 300, and the inorganic material can specifically be silicon nitride, silicon oxide, silicon oxynitride, etc., and can be formed by a CVD (Chemical Vapor Deposition) process.

[0084] Optionally, the encapsulation layer further comprises a second encapsulation layer (not shown in the figure) located on the side of the first encapsulation layer 900 away from the substrate 100, and the material of the second encapsulation layer comprises organic material. The organic material can be made of resin or high molecular organic material, and can be formed by an IJP (Inkjet printing) process.

[0085] Optionally, the encapsulation layer further comprises a third encapsulation layer (not shown in the figure) located on the side of the second encapsulation layer away from the substrate 100, and the material of the third encapsulation layer comprises inorganic material. The addition of an inorganic encapsulation layer outside the organic encapsulation layer can further improve the encapsulation effect of the encapsulation layer; in this embodiment, the material of the third encapsulation layer can be the same as or different from the material of the first encapsulation layer 900, and is not particularly limited.

[0086] Optionally, the material of the first encapsulation layer 900 is the same as the material of the third encapsulation layer, so that the first encapsulation layer 900 and the third encapsulation layer can be prepared by using the same equipment, thereby simplifying the preparation process of the display panel.

[0087] Please refer to Figures 1 to 5The display panel provided by the embodiment of the present application comprises a substrate 100, a light-emitting functional layer 300, an insulating layer 400, a first electrode layer 500, and a sealing layer 600. The sealing layer 600 is arranged on a surface of the first electrode layer 500 facing the substrate 100, and the sealing layer 600 and the insulating layer 400 are in contact to jointly encapsulate the first end portion 511. In other words, in a direction parallel to the plane where the substrate 100 is located, the sealing layer 600 extends outward relative to the first electrode to be in contact with the insulating layer 400, thereby jointly encapsulating the first end portion 511 and preventing moisture generated in a wet etching process from invading the light-emitting functional layer 300 during the preparation of the display panel. Thus, the encapsulation effect of the first electrode layer 500 is improved, the display effect of the display panel is ensured, dark spots are avoided, and the use performance of the display panel is improved.

[0088] The display panel provided by the embodiment of the present application comprises a substrate 100, a light-emitting functional layer 300, an insulating layer 400, a first electrode layer 500, and a sealing layer 600. The sealing layer 600 is arranged on a surface of the first electrode layer 500 facing the substrate 100, and the sealing layer 600 and the insulating layer 400 are in contact to jointly encapsulate the first end portion 511. In other words, in a direction parallel to the plane where the substrate 100 is located, the sealing layer 600 extends outward relative to the first electrode to be in contact with the insulating layer 400, thereby jointly encapsulating the first end portion 511 and preventing moisture generated in a wet etching process from invading the light-emitting functional layer 300 during the preparation of the display panel. Thus, the encapsulation effect of the first electrode layer 500 is improved, the display effect of the display panel is ensured, dark spots are avoided, and the use performance of the display panel is improved.

[0089] Optionally, the display panel further comprises a first planarization layer 700, which is arranged at least partially on a side of the sealing layer 600 away from the first electrode layer 500.

[0090] Optionally, the first planarization layer 700 comprises an organic material, and the material of the first planarization layer 700 can be hexamethyldisiloxane, epoxy resin, or polyimide, or other materials, which are not limited in the embodiment.

[0091] In the embodiment, the insulating layer 400 and the sealing layer 600 can be made of inorganic materials with good moisture barrier effect, such as silicon nitride, silicon oxide, silicon oxynitride, etc. The sealing layer 600 is located below the first electrode layer 500, and can prevent moisture from the first planarization layer 700 from invading the first electrode layer 500.

[0092] Please refer to Figure 4 In some optional embodiments, the first end portion 511 comprises a first surface F1 facing away from the substrate 100, a second surface F2 facing the substrate 100, and a first side surface C1 connecting the first surface F1 and the second surface F2. The insulating layer 400 is attached to the first surface F1 and the first side surface C1, and the sealing layer 600 is attached to the second surface F2.

[0093] In the embodiment, the insulating layer 400 and the sealing layer 600 are attached to the exposed surface of the first end portion 511, so as to realize the packaging of the first end portion 511, and the surface of other portions of the first electrode is also covered by the insulating layer 400 and the sealing layer 600, so as to ensure the packaging effect of the first electrode layer 500, improve the display effect of the display panel, avoid the occurrence of dark spots, and improve the use performance of the display panel.

[0094] In some optional embodiments, the sealing layer 600 includes a plurality of sealing portions 610 which are arranged at intervals and correspond to the first electrodes 510 one by one; the orthogonal projection of each sealing portion 610 on the substrate 100 covers the orthogonal projection of the corresponding first electrode 510 on the substrate 100.

[0095] In the embodiment, the sealing layer 600 can form a plurality of sealing portions 610 arranged at intervals through a patterning process, and each sealing portion 610 corresponds to a different first electrode 510; the orthogonal projection of each sealing portion 610 on the substrate 100 covers the orthogonal projection of the corresponding first electrode 510 on the substrate 100, that is, the size area of the sealing portion 610 is greater than or equal to the size area of the first electrode 510.

[0096] Optionally, the sealing portion 610 can be connected with the insulating layer 400, and thus the size area of the sealing portion 610 can be greater than the size area of the first electrode 510, so as to ensure the packaging effect.

[0097] Optionally, the material of the sealing layer 600 includes at least one of silicon nitride, silicon oxide, and silicon oxynitride.

[0098] In some optional embodiments, the distance a between the edge of the orthogonal projection of the first electrode 510 on the substrate 100 and the edge of the orthogonal projection of the sealing portion 610 on the substrate 100 is greater than or equal to 2 μm.

[0099] Since the sealing portion 610 needs to be connected with the insulating layer 400, the distance a between the edge of the orthogonal projection of the first electrode 510 on the substrate 100 and the edge of the orthogonal projection of the sealing portion 610 on the substrate 100 should not be too small, otherwise the overhanging part of the sealing portion 610 relative to the first electrode 510 cannot be connected with the insulating layer 400, and thus the distance a between the edge of the orthogonal projection of the first electrode 510 on the substrate 100 and the edge of the orthogonal projection of the sealing portion 610 on the substrate 100 is required to be greater than or equal to 2 μm.

[0100] For example, the distance a between the edge of the orthogonal projection of the first electrode 510 on the substrate 100 and the edge of the orthogonal projection of the sealing portion 610 on the substrate 100 is equal to any one of 2 μm, 3 μm, 4 μm, 5 μm, and 6 μm.

[0101] Optionally, the display panel further comprises an isolation structure 200 arranged on the side of the insulating layer 400 away from the substrate 100, the isolation structure 200 is enclosed to form a plurality of isolation openings and has a mesh structure; in the direction perpendicular to the plane where the substrate 100 is located, the first end portion 511 and the isolation structure 200 partially overlap, that is, the first electrode layer 500 extends below the isolation structure 200.

[0102] Optionally, in the direction perpendicular to the plane where the substrate 100 is located, the first electrode layer 500 and the isolation structure 200 partially overlap, that is, the boundary of the first electrode layer 500 is located below the isolation structure 200. In order to ensure the blocking effect of the sealing layer 600, correspondingly, in the direction perpendicular to the plane where the substrate 100 is located, the sealing layer 600 and the isolation structure 200 partially overlap, that is, the sealing layer 600 also extends below the isolation structure 200.

[0103] Optionally, the orthogonal projection of the first end portion 511 on the substrate 100 is located in the overlapping part of the orthogonal projection of the insulating layer 400 on the substrate 100 and the orthogonal projection of the sealing layer 600 on the substrate 100.

[0104] In the embodiment, the first end portion 511 refers to the edge portion of the first electrode 510 in the direction parallel to the plane where the substrate 100 is located. By limiting the orthogonal projection of the first end portion 511 on the substrate 100 to be located in the overlapping part of the orthogonal projection of the insulating layer 400 on the substrate 100 and the orthogonal projection of the sealing layer 600 on the substrate 100, the whole first electrode 510 is encapsulated by the sealing layer 600 and the insulating layer 400, so as to avoid the moisture from invading from above, below or the first side C1 of the first electrode 510, wherein the first side C1 is the side surface connecting the upper and lower surfaces of the first end portion 511, and the extending direction of the first side C1 intersects with the plane where the substrate 100 is located.

[0105] Optionally, the orthogonal projection of the first side C1 on the substrate 100 is located in the overlapping part of the orthogonal projection of the insulating layer 400 on the substrate 100 and the orthogonal projection of the sealing layer 600 on the substrate 100, that is, the sealing layer 600 can be in contact with the insulating layer 400, so as to wrap the first side C1 in the space enclosed by the two layers, and further improve the encapsulation effect.

[0106] In addition to the above structure of the sealing layer 600 using patterning, the sealing layer 600 can also be provided in an integral layer, that is, the sealing layer 600 is a continuous and integral structure, so as to ensure that the first planarization layer 700 and the first electrode layer 500 and the insulating layer 400 are not in contact, and further improve the blocking effect of the sealing layer 600.

[0107] The embodiment of the present application also provides a display device comprising the display panel of any of the above embodiments.

[0108] Although the present application has been described with reference to preferred embodiments, it is to be understood that various modifications can be made without departing from the scope of the application. In particular, the technical features mentioned in the various embodiments can be combined in any way, as long as there is no structural conflict. The application is not limited to the specific embodiments disclosed herein, but includes all technical equivalents falling within the scope of the claims.

Claims

1. A display panel, characterized in that, include: substrate; An insulating layer is disposed on one side of the substrate, the insulating layer including a defining portion and a first opening formed by the defining portion; The light-emitting functional layer includes a light-emitting unit defined in the first opening; A first electrode layer is disposed on the side of the light-emitting functional layer facing the substrate, and the first electrode layer includes a plurality of first electrodes; A sealing layer is disposed on the side of the first electrode layer facing the substrate, and the orthographic projection of the sealing layer on the substrate covers the orthographic projection of the first electrode layer on the substrate.

2. The display panel according to claim 1, characterized in that, Along a direction parallel to the plane of the substrate, the first electrode includes a first end, and the orthographic projection of the first end on the substrate is located within the overlapping portion of the orthographic projection of the insulating layer on the substrate and the orthographic projection of the sealing layer on the substrate; Preferably, the first electrode includes a first side surface located at the first end, and the orthographic projection of the first side surface on the substrate is located within the overlap of the orthographic projections of the insulating layer and the sealing layer on the substrate.

3. The display panel according to claim 1, characterized in that, The sealing layer is made of inorganic materials; Preferably, the material of the sealing layer includes at least one of silicon nitride, silicon oxide, and silicon oxynitride.

4. The display panel according to claim 1, characterized in that, The insulating layer is made of inorganic materials; Preferably, the material of the insulating layer includes at least one of silicon nitride, silicon oxide, and silicon oxynitride.

5. The display panel according to claim 1, characterized in that, The sealing layer is disposed on the entire surface, and the orthographic projection of the plurality of first electrodes on the substrate is located within the orthographic projection of the insulating layer on the substrate.

6. The display panel according to claim 2, characterized in that, The sealing layer includes a plurality of sealing portions spaced apart and corresponding one-to-one with the first electrode; The orthographic projection of the sealing portion on the substrate overlaps the orthographic projection of the corresponding first electrode on the substrate.

7. The display panel according to claim 6, characterized in that, The distance between the orthographic projection edge of the first electrode on the substrate and the orthographic projection edge of the sealing portion on the substrate is greater than or equal to 2 μm.

8. The display panel according to claim 6, characterized in that, Along a direction parallel to the plane of the substrate, the sealing portion includes a second end, which is in contact with the insulating layer.

9. The display panel according to claim 8, characterized in that, The display panel further includes an isolation structure disposed on the side of the insulating layer away from the substrate, the isolation structure forming a mesh structure with multiple isolation openings. In a direction perpendicular to the plane of the substrate, the first end and the isolation structure portion overlap; Preferably, the second end and the isolation structure portion overlap in a direction perpendicular to the plane of the substrate; Preferably, the orthographic projection of the first side surface on the substrate lies within the orthographic projection of the isolation structure on the substrate; Preferably, the sealing portion includes a second side surface located at the second end, and the orthographic projection of the second side surface on the substrate lies within the orthographic projection of the isolation structure on the substrate; Preferably, the sealing layer includes a via, and the first electrode extends into the via; Preferably, the orthographic projection of the via on the substrate lies within the orthographic projection of the isolation structure on the substrate.

10. The display panel according to claim 9, characterized in that, The isolation structure includes a first sublayer and a second sublayer stacked in a direction away from the substrate, wherein the orthographic projection of the first sublayer onto the substrate is located within the orthographic projection of the second sublayer onto the substrate; Preferably, the material of the isolation structure includes a conductive material, and a second electrode layer is disposed on the side of the light-emitting unit away from the substrate, and the second electrode layer is electrically connected to the isolation structure; Preferably, the defining portion comprises an inorganic material; Preferably, the isolation structure is located on the side of the limiting portion opposite to the substrate.

11. The display panel according to claim 1, characterized in that, The display panel further includes a first planarization layer, which is at least partially disposed on the side of the sealing layer opposite to the first electrode layer.

12. A display panel, characterized in that, include: substrate; An insulating layer is disposed on one side of the substrate, the insulating layer including a defining portion and a first opening formed by the defining portion; The light-emitting functional layer includes a light-emitting unit defined in the first opening; A first electrode layer is disposed on the side of the light-emitting functional layer facing the substrate. The first electrode layer includes a plurality of first electrodes along a direction parallel to the plane of the substrate. Each first electrode includes a first end. A sealing layer is disposed on the surface of the first electrode layer facing the substrate, and the sealing layer is in contact with the insulating layer to jointly encapsulate the first end.

13. The display panel according to claim 12, characterized in that, The first end portion includes a first surface facing away from the substrate, a second surface facing the substrate, and a first side surface connecting the first surface and the second surface; The insulating layer is attached to the first surface and the first side surface, and the sealing layer is attached to the second surface.

14. The display panel according to claim 12, characterized in that, The sealing layer is made of inorganic materials; Preferably, the material of the sealing layer includes at least one of silicon nitride, silicon oxide, and silicon oxynitride.

15. The display panel according to claim 12, characterized in that, The insulating layer is made of inorganic materials; Preferably, the material of the insulating layer includes at least one of silicon nitride, silicon oxide, and silicon oxynitride.

16. The display panel according to claim 12, characterized in that, The sealing layer is installed throughout the entire layer.

17. The display panel according to claim 12, characterized in that, The sealing layer includes a plurality of sealing portions spaced apart and corresponding one-to-one with the first electrode; The orthographic projection of the sealing portion on the substrate overlaps the orthographic projection of the corresponding first electrode on the substrate.

18. A display device, characterized in that, Includes the display panel as described in any one of claims 1-17.

Images