Display panel, manufacturing method thereof and display device

Abstract

The embodiment of the invention provides a display panel, a manufacturing method of the display panel and a display device, relates to the technical field of display, and aims to relieve the problem of poor uniformity of a light-emitting part during ink-jet printing in related technologies. The display panel comprises a substrate, a first electrode layer arranged on the substrate, a pixel definition layer arranged on the surface of the side, away from the substrate, of the first electrode layer, a light-emitting function layer and a second electrode layer. The surface of one side, far away from the substrate, of the first electrode layer is a plane; the pixel definition layer is provided with a plurality of mutually spaced openings, the light-emitting function layer comprises a plurality of light-emitting parts, and each light-emitting part is correspondingly arranged in one opening; the second electrode layer comprises a plurality of second electrodes which are arranged at intervals, and each second electrode is at least partially located on one corresponding light-emitting part.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display panel, a manufacturing method thereof, and a display device. Background Art

[0002] Organic Light-Emitting Diode (OLED) display panels have characteristics such as self-luminescence, high contrast, wide viewing angle, and fast response speed, and thus have received extensive attention and use.

[0003] In related technologies, an OLED display panel generally includes an array substrate and a pixel definition layer disposed on the array substrate. The pixel definition layer has a plurality of openings for arranging light-emitting devices. Since the array substrate includes many film layers, problems such as different heights and uneven terrain are likely to occur at the bottom of the openings, which in turn causes poor uniformity of the light-emitting parts of the light-emitting devices during inkjet printing, affecting the display effect of the display panel. Summary of the Invention

[0004] Embodiments of this application provide a display panel, a manufacturing method thereof, and a display device, so as to at least alleviate the problem of poor uniformity of the light-emitting parts during inkjet printing in related technologies.

[0005] On the one hand, embodiments of this application provide a display panel, which includes:

[0006] A substrate;

[0007] A first electrode layer disposed on the substrate, and the surface of the first electrode layer away from the substrate is a plane;

[0008] A pixel definition layer disposed on the surface of the first electrode layer away from the substrate, and the pixel definition layer has a plurality of spaced-apart openings;

[0009] A light-emitting functional layer including a plurality of light-emitting parts, and each light-emitting part is correspondingly disposed in one of the openings;

[0010] A second electrode layer including a plurality of spaced-apart second electrodes, and each second electrode is at least partially located on a corresponding light-emitting part.

[0011] In some embodiments, along the cross-sectional direction of the display panel, the size of the opening away from the substrate is greater than the size of the opening close to the substrate, where the cross-sectional direction is parallel to the thickness direction of the display panel.

[0012] In some embodiments, the display panel further includes a substrate and a driving circuit layer on one side of the substrate, and the second electrode is electrically connected to the driving circuit layer.

[0013] In some embodiments, the display panel further includes a plurality of conductive pads located on a side of the driving circuit layer away from the substrate and electrically connected to the driving circuit layer, and each of the conductive pads is electrically connected to a corresponding second electrode.

[0014] In some embodiments, the second electrode includes a main body portion located on the corresponding light-emitting portion and an extending portion connected to the main body portion, the extending portion is located on the pixel defining layer, and the extending portion is connected to the corresponding conductive pad.

[0015] In some embodiments, the extending portion includes a first sub-extending portion surrounding the main body portion and a second sub-extending portion connected to the first sub-extending portion, and the second sub-extending portion is connected to the corresponding conductive pad.

[0016] In some embodiments, the conductive pad is in contact with the corresponding second electrode; the display panel further includes a filling layer, the filling layer is disposed between the second electrode layer and the driving circuit layer, and surrounds each of the conductive pads.

[0017] In some embodiments, the display panel further includes a filling layer, the filling layer is disposed between the second electrode layer and the driving circuit layer, and surrounds each of the conductive pads; the conductive pad is electrically connected to the corresponding second electrode through a plurality of conductive particles in the filling layer.

[0018] On the other hand, an embodiment of the present application further provides a display device, and the display device includes the display panel as described in any of the above embodiments.

[0019] On another aspect, an embodiment of the present application further provides a manufacturing method of a display panel, and the manufacturing method includes:

[0020] Providing a substrate;

[0021] Fabricating a first electrode layer on the substrate, and a surface of the first electrode layer away from the substrate is a plane;

[0022] Fabricating a pixel defining layer on the first electrode layer, and the pixel defining layer has a plurality of spaced-apart openings;

[0023] Fabricating a plurality of light-emitting portions in the plurality of openings to form a light-emitting functional layer, wherein the light-emitting portions correspond to the openings one by one;

[0024] Fabricating a plurality of second electrodes on the plurality of light-emitting portions to form a second electrode layer, wherein each second electrode is at least partially located on a corresponding light-emitting portion.

[0025] For the display panel provided by the embodiments of the present application, since the first electrode layer is directly disposed on the substrate, the substrate can provide a flat surface for the first electrode layer, so that the surface of the first electrode layer away from the substrate is a plane. In this case, after the pixel definition layer is disposed on the first electrode layer, the openings of the pixel definition layer define the setting areas of the corresponding light-emitting portions, and the first electrode layer provides a flat surface with a consistent height for the light-emitting portions, thereby advantageously ensuring the uniformity when the light-emitting portions are fabricated by, for example, an inkjet printing process, and further effectively improving the display effect of the display panel. Description of the Drawings

[0026] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 is a cross-sectional structural view of a display panel provided by some embodiments of the present application;

[0028] Figure 2 is a cross-sectional structural view of a display panel provided by some other embodiments of the present application;

[0029] Figure 3 is a cross-sectional structural view of a display panel provided by some other embodiments of the present application;

[0030] Figure 4 is a cross-sectional structural view of a display panel provided by some other embodiments of the present application;

[0031] Figure 5 is a schematic structural view of a second electrode layer according to some embodiments of the present application;

[0032] Figure 6 is a schematic diagram of the positional relationship among a substrate, a driving circuit layer, and a conductive pad according to some embodiments of the present application;

[0033] Figure 7 is a flowchart of a manufacturing method of a display panel provided by some embodiments of the present application;

[0034] Figure 8 is a schematic structural view of a display device provided by some embodiments of the present application. Detailed Embodiments

[0035] The following will describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. The described technical solutions are only used to explain and illustrate the idea of the present application, and should not be regarded as a limitation on the protection scope of the present application.

[0036] In the description of the present application, it should be understood that terms such as "first", "second" and similar words do not denote any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words denote two or more, unless otherwise clearly defined.

[0037] "A and / or B" includes the following three combinations: only A, only B, and the combination of A and B.

[0038] The use of "for" in the present application means open and inclusive language, which does not exclude a device that is suitable for or configured to perform additional tasks or steps.

[0039] In the present application, the term "exemplary" is used to mean "serving as an example, illustration, or explanation". Any embodiment described as "exemplary" in the present application is not necessarily construed as being more preferred or advantageous than other embodiments. The following description is given to enable any person skilled in the art to implement and use the present application.

[0040] The various embodiments of the present application are similar, and the features in different embodiments and / or different examples can be combined with each other.

[0041] Some embodiments of the present application provide a display panel, as Figures 1 to 4 shown, the display panel 100 includes a substrate 10, a first electrode layer 20, a pixel definition layer 30, a light-emitting functional layer 40, and a second electrode layer 50.

[0042] Among them, the first electrode layer 20 is disposed on the substrate 10, and the surface of the first electrode layer 20 away from the substrate 10 is a plane. The pixel definition layer 30 is disposed on the surface of the first electrode layer 20 away from the substrate 10, and the pixel definition layer 30 has a plurality of openings K spaced from each other.

[0043] The light-emitting functional layer 40 includes a plurality of light-emitting portions 41, and each light-emitting portion 41 is correspondingly disposed within an opening K. The second electrode layer 50 includes a plurality of second electrodes 51 spaced from each other, and each second electrode 51 is at least partially located on a corresponding light-emitting portion 41. Among them, the second electrode 51, the corresponding light-emitting portion 41, and the portion of the first electrode layer 20 corresponding to the light-emitting portion 41 (hereinafter referred to as the first electrode) can form a light-emitting device. All the first electrodes in the first electrode layer 20 are connected to each other, so that signals can be directly input to all the first electrodes through an input terminal. In addition, in a light-emitting device, when the first electrode and the second electrode input corresponding signals, the light-emitting portion 41 can be driven to emit light, thereby realizing the turn-on of the light-emitting device. As an example, the first electrode can input a cathode signal, and the second electrode can input an anode signal to realize the turn-on of the light-emitting device. Since the display panel 100 has a plurality of light-emitting devices, the display function of the display panel 100 can be realized by turning on different light-emitting devices.

[0044] In the embodiment of the present application, since the first electrode layer 20 is directly disposed on the substrate 10, the substrate 10 can provide a flat surface for the first electrode layer 20, so that the surface of the first electrode layer 20 away from the substrate 10 is a plane. In this case, after the pixel definition layer 30 is disposed on the first electrode layer 20, the opening K of the pixel definition layer 30 defines the setting area of the corresponding light-emitting portion 41, and the first electrode layer 20 provides a surface with a uniform height and flatness for the light-emitting portion 41, thereby advantageously ensuring the uniformity of the light-emitting portion 41 when manufactured by, for example, an inkjet printing process, and effectively improving the display effect of the display panel 100.

[0045] It should be noted that for the display panel 100 provided in the embodiment of the present application, all the first electrodes in the first electrode layer 20 are connected to each other, that is to say, the entire first electrode layer 20 is disposed on the substrate 10. Therefore, the substrate 10 only serves as a carrier for arranging the first electrode layer 20. Since there is no need to provide a film layer related to the driving circuit on the substrate 10, it is possible to ensure that the surface of the first electrode layer 20 away from the substrate 10 is a surface with a uniform height and flatness. Among them, "uniform height" mainly means that the first electrode layer 20 has contact surfaces corresponding to the plurality of light-emitting portions 41 one by one, and the distances between these contact surfaces are equal with respect to a reference plane perpendicular to the thickness direction of the substrate 10; "flat" mainly means that the distances between multiple positions of each contact surface are equal with respect to the reference plane.

[0046] In some embodiments, please continue to refer to Figures 1 to 4, along the sectional direction of the display panel 100, the dimension of the opening K away from the substrate 10 (hereinafter referred to as the first dimension D1) is greater than the dimension of the opening K close to the substrate 10 (hereinafter referred to as the second dimension D2), wherein the sectional direction is parallel to the thickness direction X of the display panel 100. Figures 1 to 4 That is, a cross-sectional view of the display panel 100 along this sectional direction is shown.

[0047] In this embodiment, by setting the first dimension D1 of the opening K to be greater than the second dimension D2, it is beneficial to increase the aperture ratio of the corresponding light-emitting device, thereby improving the display brightness of the display panel 100. Moreover, during the production of the light-emitting functional layer 40 by inkjet printing, the ink is likely to accumulate at the edge of the opening K. By setting the opening K to have a large top size and a small bottom size, the ink can be guided to flow to the middle position under the action of gravity, which can, on the one hand, improve the thickness uniformity of the light-emitting functional layer 40, and on the other hand, avoid the problem of electrical crosstalk caused by the contact of the light-emitting parts of adjacent light-emitting devices.

[0048] In some embodiments, please continue to refer to Figures 1 to 4 , the display panel 100 further includes a substrate 60 and a driving circuit layer 70 located on one side of the substrate 60, and the second electrode 51 is electrically connected to the driving circuit layer 70. Among them, the driving circuit layer 70 can input a signal to the second electrode 51 to drive the corresponding light-emitting part 41 in cooperation with the signal input by the first electrode, thereby realizing the turning on of the corresponding light-emitting device.

[0049] In some examples, as Figure 2 shown, the driving circuit layer 70 includes a plurality of pixel driving circuits 701, and each pixel driving circuit 701 can be electrically connected to a second electrode 51, so that each pixel driving circuit 701 can control the corresponding light-emitting device to turn on, and further realize the display function of the display panel 100.

[0050] In some embodiments, as Figures 2 to 4 shown, the display panel 100 further includes a plurality of conductive pads 80 located on the side of the driving circuit layer 70 away from the substrate 60 and electrically connected to the driving circuit layer 70, and each conductive pad 80 is electrically connected to a corresponding second electrode 51.

[0051] By providing the conductive pads 80 on the side of the driving circuit layer 70 away from the substrate 60, it can ensure that there are connection components with sufficient area on one side of the driving circuit layer 70 to realize the electrical connection between the conductive pads 80 and the driving circuit layer 70.

[0052] As an example, each pixel driving circuit 701 is connected to a corresponding conductive pad 80 and is connected to the corresponding second electrode 51 through the conductive pad 80, thereby realizing signal transmission.

[0053] In some embodiments, such as Figure 3 and Figure 4 shown, the second electrode 51 includes a main body portion 511 located on the corresponding light-emitting portion 41 and an extension portion 512 connected to the main body portion 511. The extension portion 512 is located on the pixel defining layer 30, and the extension portion 512 is connected to the corresponding conductive pad 80.

[0054] Since the second electrode 51 includes the extension portion 512 located on the pixel defining layer 30, the pixel defining layer 30 can provide stable support for the extension portion 512, facilitating the connection between the extension portion 512 and the corresponding conductive pad 80. Thus, it can avoid the influence of the force applied during the connection between the second electrode 51 and the corresponding conductive pad 80 on the light-emitting portion 41 covered by the second electrode 51, and further avoid the damage of the light-emitting portion 41, which may affect the display of the display panel 100. Moreover, during the use of the display panel 100, when an external force is applied to the substrate 10 and the substrate 60 towards each other, since the extension portion 512 is connected to the corresponding conductive pad 80, this can make the force finally act on the pixel defining layer 30, thereby ensuring the use stability of the display panel 100.

[0055] As an example, the main body portion 511 covers the corresponding light-emitting portion 41, thereby forming effective protection for the light-emitting portion 41.

[0056] In some embodiments, such as Figure 5 shown, the extension portion 512 includes a first sub-extension portion 5121 surrounding the main body portion 511 and a second sub-extension portion 5122 connected to the first sub-extension portion 5121. The second sub-extension portion 5122 is connected to the corresponding conductive pad 80.

[0057] In this embodiment, since the main body portion 511 is located on the corresponding light-emitting portion 41 and the first sub-extension portion 5121 surrounds the main body portion 511, this can further improve the protection of the second electrode 51 for the corresponding light-emitting portion 41, thereby avoiding the problem that the light-emitting portion 41 is easily affected by the outside due to partial exposure outside the second electrode 51. For example, through the protection of the first sub-extension portion 5121, it is beneficial to avoid the problem of the light-emitting portion 41 being eroded by water and oxygen.

[0058] It should be noted that Figure 5 the main body portion 511 is completely located in the opening K, while the first sub-extension portion 5121 and the second sub-extension portion 5122 are both located outside the opening K.

[0059] In some examples, along the top view direction of the display panel 100, the side of the opening K away from the substrate 10 can be circular. In this case, the main body portion 511 is also circular, and the first sub-extension portion 5121 surrounding the main body portion 511 can be annular. As an example, the second sub-extension portion 5122 can be linear, so that the area of the second sub-extension portion 5122 can be reduced, which is beneficial to avoiding contact between different second electrodes 51.

[0060] When the second sub-extension portion 5122 is linear along the top view direction of the display panel 100, multiple second sub-extension portions 5122 arranged in the column direction (hereinafter referred to as the first part of the second sub-extension portions 5122) all extend in the first direction, and multiple second sub-extension portions 5122 arranged in the column direction (hereinafter referred to as the second part of the second sub-extension portions 5122) all extend in the second direction, and the first direction and the second direction are opposite. The first part of the second sub-extension portions 5122 and the second part of the second sub-extension portions 5122 are arranged side by side and adjacent to each other. This makes the first part of the second sub-extension portions 5122 and the second part of the second sub-extension portions 5122 concentrated in a specific area, and the density of the conductive pads 80 in this specific area is relatively large. Therefore, this specific area has relatively better pressure-bearing capacity, so as to improve the pressure-bearing effect of a partial area of the display panel 100 to adapt to the high-frequency or long-time pressure in this area.

[0061] In some embodiments, as Figure 3 shown, the conductive pad 80 is in contact with the corresponding second electrode 51. The display panel 100 further includes a filling layer 90, and the filling layer 90 is disposed between the second electrode layer 50 and the driving circuit layer 70 and surrounds each conductive pad 80.

[0062] By providing the filling layer 90, the filling layer 90 can fill the area between the second electrode layer 50 and the driving circuit layer 70, thereby ensuring the structural stability of the display panel 100. In addition, the filling layer can also protect the second electrode layer 50, the driving circuit layer 70, and all the conductive pads 80, so as to avoid the above-mentioned film layers or devices from being affected by the outside.

[0063] As an example, the filling layer 90 can be made of optically clear adhesive. On the one hand, the optically clear adhesive can effectively fill the area between the second electrode layer 50 and the driving circuit layer 70, and protect the second electrode layer 50, the driving circuit layer 70, and all conductive pads 80. On the other hand, the optically clear adhesive can provide good bonding strength after curing, ensuring that the display panel 100 maintains good mechanical properties under dynamic or static conditions. In addition, the optically clear adhesive has the characteristics of high transparency and low haze, thus improving the brightness and color saturation of the display panel 100; the optically clear adhesive also has the characteristics of high temperature resistance and moisture resistance, and can maintain stable performance in the high temperature and high pressure lamination process, while resisting the erosion of the external environment during use.

[0064] In some embodiments, such as Figure 4 shown, the display panel further includes a filling layer 90, the filling layer 90 is disposed between the 50 and the driving circuit layer 70, and surrounds each conductive pad 80. The conductive pad 80 is electrically connected to the corresponding second electrode 51 through a plurality of conductive particles 91 in the filling layer 90.

[0065] By providing the filling layer 90, the filling layer 90 can fill the area between the second electrode layer 50 and the driving circuit layer 70, thereby ensuring the structural stability of the display panel 100. In addition, the filling layer can also protect the second electrode layer 50, the driving circuit layer 70, and all conductive pads 80, thereby preventing the above-mentioned film layers or devices from being affected by the outside. In addition, since the conductive pad 80 is electrically connected to the corresponding second electrode 51 through a plurality of conductive particles 91, when the conductive pads 80 have different heights at different positions, the electrical connection between the conductive pad 80 and the corresponding second electrode 51 can be achieved by using different numbers of conductive particles 91, thereby ensuring the effective display of the display panel 100.

[0066] As an example, the filling layer 90 can be made of anisotropic conductive adhesive. In this case, through the conductive particles in the anisotropic conductive adhesive, the electrical connection between the conductive pad 80 and the corresponding second electrode 51 can be effectively achieved. Along the horizontal direction (the horizontal direction is perpendicular to the thickness direction of the display panel 100), due to the isolation of the resin, insulation between adjacent horizontal directions is achieved. On the one hand, the anisotropic conductive adhesive can effectively fill the area between the second electrode layer 50 and the driving circuit layer 70, and protect the second electrode layer 50, the driving circuit layer 70, and all conductive pads 80. On the other hand, the anisotropic conductive adhesive can provide good bonding strength after curing, ensuring that the display panel 100 maintains good mechanical properties under dynamic or static conditions.

[0067] In some examples, the above-mentioned filling layer 90 can be arranged under high temperature and high pressure conditions to ensure stable bonding between the second electrode layer 50 and the driving circuit layer 70.

[0068] In some embodiments, as Figure 6 shown, the pixel driving circuit 701 includes a plurality of thin film transistors and at least one storage capacitor. Among them, the thin film transistor includes an active layer, a gate, a source, and a drain disposed on a substrate. The film layer where the active layer is located is the semiconductor layer 73; the film layer where the gate is located is the gate metal layer 75, and the film layers where the source and the drain are located are the source-drain metal layer 77.

[0069] Among them, a gate insulating layer 74 is provided between the semiconductor layer 73 and the gate metal layer 75, and an interlayer insulating layer 76 is provided between the gate metal layer 75 and the source-drain metal layer 77. In some examples, the interlayer insulating layer 76 may include a first sub-interlayer insulating layer and a second sub-interlayer insulating layer arranged in sequence. In this case, a metal layer may be provided between the first sub-interlayer insulating layer and the second sub-interlayer insulating layer to arrange an electrode of the storage capacitor or other circuit devices.

[0070] One of the source and the drain of the thin film transistor is electrically connected to the conductive pad 80 to transmit a corresponding signal to the second electrode in the corresponding light-emitting device through the conductive pad 80, and then drive the light-emitting part 41 in the light-emitting device to emit light under the cooperation of the signal input by the first electrode.

[0071] In some examples, a passivation layer 78 may further be provided on the side of the source-drain metal layer 77 away from the substrate 60. A first via hole is formed in the passivation layer 78, and the conductive pad 80 is electrically connected to the drain in the source-drain metal layer 77 through the first via hole.

[0072] As an example, a planarization layer 79 may further be provided on the side of the passivation layer 78 away from the substrate 60. A second via hole is formed in the planarization layer 79, and the conductive pad 80 is electrically connected to the drain in the source-drain metal layer 77 through the second via hole and the first via hole in sequence. By providing the planarization layer 79, a planar surface can be provided for the conductive pad 80, so as to ensure that all the conductive pads 80 are located at the same height, and thus facilitate the connection between the conductive pad 80 and the corresponding second electrode 51.

[0073] In some examples, a light-shielding layer 71 is provided on the side of the semiconductor layer 73 close to the substrate 60, and an insulating film 72 is provided between the light-shielding layer 71 and the semiconductor layer 73. Among them, the light-shielding layer 71 can effectively block external light from irradiating the semiconductor layer 73, thereby effectively reducing the generation of leakage current in the thin film transistor, and further improving the switching characteristics and stability of the thin film transistor.

[0074] As an example, a third via hole and a fourth via hole are respectively formed in the insulating film 72 and the interlayer insulating layer 76, and the light-shielding layer 71 is electrically connected to the drain in the source-drain metal layer 77 through the third via hole and the fourth via hole. This can avoid the problem of the threshold voltage shift of the thin film transistor caused by the floating gate effect of the light-shielding layer 71.

[0075] It should be noted that the gate metal layer 75 can be located on the side of the semiconductor layer 73 away from or close to the substrate 60. As Figure 6 shown, when the gate metal layer 75 is located on the side of the semiconductor layer 73 away from the substrate 60, the gate of the thin-film transistor of the pixel driving circuit is located on the side of the active layer away from the substrate 60. At this time, the thin-film transistor is a top-gate structure. When the gate metal layer 75 is located on the side of the semiconductor layer 73 close to the substrate 60, the gate of the thin-film transistor of the pixel driving circuit is located on the side of the active layer close to the substrate 60. At this time, the thin-film transistor is a bottom-gate structure.

[0076] Some embodiments of the present application also provide a manufacturing method of a display panel. As Figure 7 shown and please refer to Figure 1 , this manufacturing method includes the following steps:

[0077] S10: Provide a substrate 10.

[0078] For example, the substrate can be a rigid substrate or a flexible substrate. When the substrate is a rigid substrate, the material of the substrate can be glass. When the substrate is a flexible substrate, the material of the substrate can be polyimide or polyethylene terephthalate and other materials. It is worth noting that when the substrate is a flexible substrate, a rigid material can be provided at its bottom to provide support for the substrate, so as to facilitate the setting of other film layers of the display panel 100.

[0079] S20: Fabricate a first electrode layer 20 on the substrate 10, and the surface on the side of the first electrode layer 20 away from the substrate 10 is flat.

[0080] S30: Fabricate a pixel definition layer 30 on the first electrode layer 20, and the pixel definition layer 30 has a plurality of spaced-apart openings K.

[0081] Among them, the opening K can be fabricated by a photolithography process (for example, including steps such as exposure, development, and etching).

[0082] S40: Fabricate a plurality of light-emitting parts 41 in the plurality of openings K to form a light-emitting functional layer 40, where the light-emitting parts 41 correspond to the openings K one by one.

[0083] Among them, the light-emitting functional layer 40 can be fabricated by an inkjet printing process.

[0084] S50: Fabricate a plurality of second electrodes 51 on the plurality of light-emitting parts 41 to form a second electrode layer 50, and each second electrode 51 is at least partially located on a corresponding light-emitting part 41.

[0085] In the embodiment of the present application, since the first electrode layer 20 is directly disposed on the substrate 10, the substrate 10 can provide a flat surface for the first electrode layer 20, so that the surface of the first electrode layer 20 away from the substrate 10 is a plane. In this case, after the pixel defining layer 30 is disposed on the first electrode layer 20, the opening K of the pixel defining layer 30 defines the setting area of the corresponding light-emitting portion 41, and the first electrode layer 20 provides a flat surface with a consistent height for the light-emitting portion 41, thereby advantageously ensuring the uniformity of the light-emitting portion 41 during the manufacturing process by inkjet printing, and further effectively improving the display effect of the display panel 100.

[0086] After step S50, a first electrode layer 20, a pixel defining layer 30, a light-emitting functional layer 40, and a second electrode layer 50 are formed on the substrate 10, and together they form a first component.

[0087] In some embodiments, referring to Figures 2 to 4 , the above manufacturing method further includes the following steps:

[0088] S11: Provide a substrate 60.

[0089] S21: Fabricate a driving circuit layer 70 on the substrate 60 to form a second component.

[0090] S31: Bond the second component and the first component so that each second electrode 51 is electrically connected to the driving circuit layer 70.

[0091] In some embodiments, as Figure 3 and Figure 4 shown, step S21 includes: fabricating a driving circuit layer 70 on the substrate 60; fabricating a plurality of conductive pads 80 on the side of the driving circuit layer 70 away from the substrate 60, and each conductive pad 80 is electrically connected to the driving circuit layer 70 to form a second component.

[0092] In this case, when the second component and the first component are bonded, the conductive pads 80 can be aligned with the second electrodes 51 one by one to ensure that each second electrode 51 is effectively electrically connected to the driving circuit layer 70.

[0093] In some examples, as Figure 3 shown, when the conductive pad 80 has a relatively large thickness, the conductive pad 80 can be abutted against the corresponding second electrode 51 to achieve effective electrical connection between each second electrode 51 and the driving circuit layer 70. In this case, a filling layer 90 (such as an optically transparent adhesive) can be provided between the second component and the first component to realize the bonding of the first component and the second component.

[0094] In other examples, as Figure 4As shown, when the conductive pad 80 has a relatively small thickness, the conductive pad 80 can be aligned with the corresponding second electrode 51. Then, a filling layer 90 (such as anisotropic conductive adhesive) is provided between the second component and the first component to ensure effective electrical connection between each second electrode 51 and the driving circuit layer 70 while realizing the fitting of the first component and the second component.

[0095] It should be noted that the anisotropic conductive adhesive contains conductive particles 91, which can achieve the electrical connection between the conductive pad 80 and the corresponding second electrode 51, and ultimately realize the effective connection between the second electrode 51 and the driving circuit layer 70.

[0096] Some embodiments of the present application provide a display device, such as Figure 8 As shown, the display device 200 includes the display panel 100 described in any of the above embodiments.

[0097] Since it includes the display panel 100, the display device 200 has all the technical effects of the above display panel 100, which will not be elaborated here.

[0098] In some examples, the display device 200 further includes a frame 201 for fixing the display panel 100 to fix the display panel 100.

[0099] In some examples, the display device 200 can be a watch, a tablet computer, a laptop computer, a monitor, a television, a billboard, a digital photo frame, a printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable video camera, a viewfinder, a navigator, a household appliance, an information query device (such as a business query device in departments such as e-government, banks, hospitals, power, and post offices), etc., any component with a display function. The specific form of the above display device 200 in the embodiments of the present application is not particularly limited.

[0100] The above has introduced the embodiments of the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A display panel, characterized in that, Comprising: A substrate; A first electrode layer disposed on the substrate, the surface of the first electrode layer away from the substrate being planar; A pixel definition layer disposed on the surface of the first electrode layer away from the substrate, the pixel definition layer having a plurality of spaced-apart openings; A light-emitting functional layer including a plurality of light-emitting portions, each of the light-emitting portions being correspondingly disposed in one of the openings; A second electrode layer including a plurality of spaced-apart second electrodes, each of the second electrodes being at least partially located on a corresponding one of the light-emitting portions.

2. The display panel according to claim 1, characterized in that, In the cross-sectional direction of the display panel, the size of the opening away from the substrate is larger than the size of the opening close to the substrate, wherein the cross-sectional direction is parallel to the thickness direction of the display panel.

3. The display panel according to claim 1 or 2, characterized in that, The display panel further includes a substrate and a driving circuit layer on one side of the substrate, and the second electrode is electrically connected to the driving circuit layer.

4. The display panel according to claim 3, wherein, The display panel further includes a plurality of conductive pads located on the side of the driving circuit layer away from the substrate and electrically connected to the driving circuit layer, each of the conductive pads being electrically connected to a corresponding one of the second electrodes.

5. The display panel according to claim 4, wherein, The second electrode includes a main body portion located on the corresponding light-emitting portion and an extension portion connected to the main body portion, the extension portion being located on the pixel definition layer, and the extension portion being connected to the corresponding conductive pad.

6. The display panel according to claim 5, characterized in that, The extension portion includes a first sub-extension portion surrounding the main body portion and a second sub-extension portion connected to the first sub-extension portion, the second sub-extension portion being connected to the corresponding conductive pad.

7. The display panel according to claim 4, wherein The conductive pad is in contact with the corresponding second electrode; The display panel further includes a filling layer disposed between the second electrode layer and the driving circuit layer and surrounding each of the conductive pads.

8. The display panel according to claim 4, wherein, The display panel further includes a filling layer disposed between the second electrode layer and the driving circuit layer and surrounding each of the conductive pads; The conductive pad is electrically connected to the corresponding second electrode through a plurality of conductive particles in the filling layer.

9. A display device, characterized in that, The display device includes the display panel according to any one of claims 1-8.

10. A manufacturing method of a display panel, characterized in that, Comprising: Providing a substrate; Fabricating a first electrode layer on the substrate, the surface of the first electrode layer away from the substrate being planar; Fabricating a pixel definition layer on the first electrode layer, the pixel definition layer having a plurality of spaced-apart openings; Fabricating a plurality of light-emitting portions in the plurality of openings to form a light-emitting functional layer, wherein the light-emitting portions correspond to the openings one by one; Fabricating a plurality of second electrodes on the plurality of light-emitting portions to form a second electrode layer, wherein each second electrode is at least partially located on a corresponding one of the light-emitting portions.

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