RU2812951C1 - Display device, display panel and method for their manufacture - Google Patents

Abstract

FIELD: electronic engineering.

SUBSTANCE: display panel contains a drive backplane; a first electrode layer located on a surface of the drive backplane and comprising a plurality of first electrodes distributed in a matrix; a light emitting function layer formed on a side of the first electrode layer facing away from the drive backplane; a second electrode covering the light emitting function layer and comprising a separating section and a plurality of flat sections separated by the separating section, wherein the separating section comprises raised sections and first recessed sections, wherein the protruded sections protrude from the drive backplane and the first recessed sections are recessed toward excitation backplane; and a leakage cutting layer formed on the same side of the drive backplane as the first electrode layer and separated by the first electrodes.

EFFECT: increasing the stability of luminescence.

59 cl, 12 dwg

Description

The present disclosure relates generally to the field of display technology and, in particular, to a display device, a display panel, and a method for manufacturing a display panel.

State of the art

Currently, organic light-emitting diode (OLED) display panels are increasingly used. In a display panel, OLED light emitting devices generally include a plurality of OLED light emitting devices distributed in an array, and each light emitting device may separately emit light in order to display an image. However, due to the manufacturing process, the luminescence stability of an OLED light-emitting device still needs to be improved.

It should be noted that the information disclosed in the “Background of the Art” section above is used only to facilitate understanding of the background of the present disclosure and, thus, may include information that does not constitute prior art known to those skilled in the art.

Disclosure of the invention

An object of the present invention is to provide a display device, a display panel, and a method for manufacturing a display panel.

According to an aspect of the present disclosure, there is provided a display panel including:

excitation backplane;

a first electrode layer located on a surface of the drive backplane and including a plurality of first electrodes distributed in a matrix, the first electrode including a flat middle portion and an edge portion surrounding the middle portion, wherein the edge portion includes a horizontal portion, a surrounding middle portion, and a rising portion connecting the middle portion to the horizontal portion, the thickness of the horizontal portion being less than the thickness of the middle portion;

a light-emitting layer at least partially covering the middle portion; And

a second electrode covering the light emitting function layer and including a separating portion and a plurality of flat portions separated by the separating portion, the orthographic projections of the respective flat portions onto the drive backplane being arranged within the first electrodes in a one-to-one correspondence, the separating portion including a protruding portion and first recessed portions connecting the protruding portions and the flat portions, the first recessed portions are recessed toward the side of the flat portions close to the drive backplane, the protruding portion protrudes toward the side of the flat portions facing away from the drive backplane, and orthographic projections of the first recessed portions on the drive backplane is at least partially located outside the middle portions of the first electrodes.

In an exemplary embodiment of the present disclosure, in cross sections perpendicular to the field backplane, orthographic projections of the low points of the first recessed portions onto the field backplane are located outside the middle portions of the first electrodes.

In an exemplary embodiment of the present disclosure, the first recessed portion includes a first side surface connected to the flat portion and a second side surface connected to the raised portion, and the first side surface and the second side surface taper along a direction adjacent to the drive backplane.

In an exemplary embodiment of the present disclosure, the slope of the first side surface relative to the middle portion is less than or equal to the slope of the second side surface relative to the middle portion.

In an exemplary embodiment of the present disclosure, the minimum thickness of the portion of the second electrode corresponding to the first side surface is greater than the thickness of the portion corresponding to the second side surface.

In an exemplary embodiment of the present disclosure, the inclination of the first side surface relative to the midsection is less than 60°, and the inclination of the second side surface relative to the midsection is no less than 60° and no more than 90°.

In an exemplary embodiment of the present disclosure, the width of the orthographic projection of the first recessed portion onto the drive backplane does not exceed 0.2 μm.

In an exemplary embodiment of the present disclosure, the depth of the first recessed portion is less than twice the maximum thickness of the second electrode.

In an exemplary embodiment of the present disclosure, the maximum thickness of the second electrode is 90 nm and the depth of the first recessed portion is less than 120 nm.

In an exemplary embodiment of the present disclosure, the inclination of the rising portion relative to the drive backplane is at least 30°.

In an exemplary embodiment of the present disclosure, the minimum value of the distance between the bottom of the first recessed portion and the middle portion of the adjacent first electrodes in a direction perpendicular to the drive backplane is at least 70% of the total thickness of the flat portion and the light emitting function layer.

In an exemplary embodiment of the present disclosure, the protruding portion has a second recessed portion recessed toward the drive backplane, wherein the depth of the second recessed portion is less than the depth of the first recessed portion.

In an exemplary embodiment of the present disclosure, the display panel further includes:

a leakage cutting layer formed on the same surface of the drive backplane as the first electrode layer, the light emitting function layer covering the leakage cutting layer,

wherein the leakage cutting layer includes a first restriction layer and a second restriction layer stacked sequentially in a direction away from the drive backplane, wherein both the first restriction layer and the second restriction layer at least partially expose the middle portions of the first electrodes , and the edge of the orthographic projection of the second bounding layer onto the drive backplane is located outside the middle portion, and

in a cross section perpendicular to the excitation backplane, the orthographic projection of the lower point of the first recessed portion onto the excitation backplane is located between the orthographic projections of the middle portion and the second confining layer onto the excitation backplane, the second confining layer being located within the orthographic projection of the protruding portion onto the leakage cutoff layer.

In an exemplary embodiment of the present disclosure, the display panel further includes:

a leakage cutting layer including a first confining layer and a second confining layer, the first confining layer and the first electrode layer being formed on the same surface of the drive backplane and having a plurality of holes, the corresponding first electrodes being arranged in the holes in a one-to-one correspondence, and a spatial region is formed between the edge portion of each of the first electrodes and the side wall of the hole where the first electrode is located, exposing the drive backplane,

wherein the second limiting layer covers the first limiting layer and the drive backplane located in the spatial region, and at least partially opens the middle part of the first electrode, and the second limiting layer is recessed in the direction of the drive backplane in the spatial region and in a portion corresponding to the edge portion , and the thickness of the second limiting layer is less than the thickness of the first limiting layer, and

the light emitting layer covers the second boundary layer.

According to an aspect of the present disclosure, there is provided a display panel including:

excitation backplane;

a first electrode layer located on a surface of the drive backplane and including a plurality of first electrodes distributed in a matrix, the first electrode including a flat middle portion and an edge portion surrounding the middle portion, wherein the edge portion includes a horizontal portion, a surrounding middle portion, and a rising portion connecting the middle portion to the horizontal portion, the thickness of the horizontal portion being less than the thickness of the middle portion;

a leakage-stopping layer formed on the same surface of the drive backplane as the first electrode layer, and including a first confinement layer and a second confinement layer stacked on top of each other in a direction facing away from the drive backplane, the first confinement layer being provided with the first holes exposing the respective first electrodes in a one-to-one correspondence, the second boundary layer is provided with second holes externally surrounding the first holes at positions corresponding to the first holes, the orthographic projection of the second boundary layer onto the drive backplane and the middle portions are spaced, the first boundary layer is provided with a plurality of ring-shaped holes with a blind hole structure surrounding the first holes in a one-to-one correspondence, and a second boundary layer is provided on a surface of the first boundary layer facing away from the drive backplane and is located outside the annular holes;

a light emitting function layer at least partially covering the leakage cutting layer and the middle portion of the first electrode; And

a second electrode covering the layer with the function of emitting light.

In an exemplary embodiment of the present disclosure, the distance between the side wall of the second hole and the edge of the middle portion of the first electrode that surrounds the second hole is at least 1/5 of the maximum distance between the middle portions of two adjacent electrodes of the first electrodes.

In an exemplary embodiment of the present disclosure, the distance between the side wall of the second hole and the edge of the middle portion of the first electrode that surrounds the second hole is at least 0.2 μm.

In an exemplary embodiment of the present disclosure, in a direction perpendicular to the drive backplane, the distance between the surface of the second boundary layer facing away from the drive backplane and the surface of the middle portion facing away from the drive backplane is at least 25% of the thickness of the emission function layer light and no more than 80% of the thickness of the layer with the function of emitting light.

In an exemplary embodiment of the present disclosure, the side wall of the second hole extends in a direction away from the drive backplane, and the angle between the side wall of the second hole and the middle portion is no less than 65° and no more than 90°.

In an exemplary embodiment of the present disclosure, a groove is formed in a portion of the second boundary layer outside the second opening.

In an exemplary embodiment of the present disclosure, the width of the groove is less than the distance between the middle portions of two adjacent electrodes of the first electrodes.

In an exemplary embodiment of the present disclosure, the groove width is greater than 0.2 μm.

According to an aspect of the present disclosure, there is provided a display panel including:

excitation backplane;

a first electrode layer located on a surface of the drive backplane and including a plurality of first electrodes distributed in a matrix, the first electrode including a flat middle portion and an edge portion surrounding the middle portion, wherein the edge portion includes a horizontal portion, a surrounding middle portion, and a rising portion connecting the middle portion to the horizontal portion, the thickness of the horizontal portion being less than the thickness of the middle portion;

a leakage cutting layer including a first limiting layer and a second limiting layer, wherein the first limiting layer and the first electrode layer are formed on the same surface of the drive backplane and have a plurality of holes, the corresponding first electrodes are located in the holes in a one-to-one correspondence, between an edge portion of each of the first electrodes and a side wall of the hole where the first electrode is located forms a spatial region exposing the drive backplane, the second boundary layer covers the first boundary layer and the drive backplane located in the spatial region, and at least partially exposes the middle portion of the first electrode, the second limiting layer is recessed towards the drive backplane in the spatial region and the region corresponding to the edge portion;

a light emitting function layer at least partially covering the second boundary layer and the middle portion of the first electrode; And

a second electrode covering the layer with the function of emitting light.

In an exemplary embodiment of the present disclosure, the thickness of the second boundary layer is less than the thickness of the first boundary layer.

In an exemplary embodiment of the present disclosure, the drive backplane is provided with an annular groove surrounding the first electrode in the spatial region, and a portion of the second boundary layer located in the spatial region is recessed into the annular groove.

In an exemplary embodiment of the present disclosure, the drive backplane includes:

substrate;

drive transistors located on the side of the substrate; And

an equalization layer provided on a side of the driving transistors facing away from the substrate, wherein a first electrode layer and a leakage cutting layer are provided on a surface of the equalization layer facing away from the substrate, wherein the material of the equalization layer and the materials of the first confinement layer and the second confinement layer are the same.

In an exemplary embodiment of the present disclosure, the orthographic projections of the annular groove and the spatial region onto the drive backplane overlap.

In an exemplary embodiment of the present disclosure, the inclination of the second electrode portion corresponding to the side wall of the hole relative to the middle portion is not less than 65° and not more than 90°, and the inclination of the second electrode portion corresponding to the edge portion with respect to the middle portion is less than 60°.

In an exemplary embodiment of the present disclosure, the thickness of the second boundary layer is less than 1/5 the thickness of the first boundary layer.

According to an aspect of the present disclosure, there is provided a method for manufacturing a display panel, including the steps of:

forming a first electrode layer on a surface of the drive backplane, the first electrode layer including a plurality of first electrodes distributed in a matrix, the first electrode including a flat middle portion and an edge portion surrounding the middle portion, the edge portion including a horizontal portion, a surrounding middle portion, and a rising portion connecting the middle portion to the horizontal portion, the thickness of the horizontal portion being less than the thickness of the middle portion;

forming a leakage-cutting layer on a surface of the drive backplane where the first electrode layer is formed, the leakage-cutting layer including a first limiting layer and a second limiting layer that are sequentially stacked on each other in a direction facing away from the drive backplane, the first limiting layer is provided with first holes exposing the respective first electrodes in a one-to-one correspondence, the second boundary layer is provided with second holes externally surrounding the first holes in positions corresponding to the first holes, the orthographic projection of the second boundary layer onto the drive backplane and the middle portions are spaced from each other, the first boundary the layer is provided with a plurality of ring-shaped holes with a blind hole pattern surrounding the first holes in a one-to-one correspondence, and the second boundary layer is located on a surface of the first boundary layer facing away from the drive backplane and is located outside the ring-shaped holes;

forming a light emitting function layer at least partially covering the leakage cutting layer and the middle portion; And

forming a second electrode covering the light emitting function layer.

In an exemplary embodiment of the present disclosure, the first boundary layer and the second boundary layer are formed during the same patterning process.

According to an aspect of the present disclosure, there is provided a method for manufacturing a display panel, including the steps of:

forming a first electrode layer on a surface of the drive backplane, the first electrode layer including a plurality of first electrodes distributed in a matrix, the first electrode including a flat middle portion and an edge portion surrounding the middle portion, the edge portion including a horizontal portion, a surrounding middle portion, and a rising portion connecting the middle portion to the horizontal portion, the thickness of the horizontal portion being less than the thickness of the middle portion;

forming a first boundary layer on the surface of the drive backplane where the first electrode layer is provided, the first boundary layer being provided with a plurality of holes, the respective first electrodes being provided in the respective holes in a one-to-one correspondence, and between each of the edge portions and the side wall of the hole where the edge portion is located part, a spatial region is formed to open the excitation backplane;

forming a second boundary layer covering the first boundary layer and the drive backplane located in the spatial regions, the second boundary layer at least partially opening the corresponding middle portions and recessed toward the drive backplane in the spatial regions and regions corresponding to the edge portions;

forming a light emitting function layer that at least partially covers the second boundary layer and the middle portions; And

forming a second electrode covering the light emitting function layer.

According to an aspect of the present disclosure, there is provided a display device including a display panel in accordance with any of the above aspects.

It should be understood that the foregoing general description and the following detailed description are illustrative and explanatory only and are not intended to limit the present disclosure.

Brief description of drawings

The drawings set forth herein are included in the description and form part of the description, show embodiments in accordance with the disclosure, and together with the description are used to explain the principle of the disclosure. It is understood that the drawings in the following description are only some embodiments of the present disclosure. Those skilled in the art can obtain other drawings based on these drawings without creative effort.

Fig. 1 is a schematic diagram of an embodiment of a first display panel according to the present disclosure.

Fig. 2 is an electron micrograph of an embodiment of a first display panel according to the present disclosure.

Fig. 3 is a schematic diagram of another embodiment of a first display panel according to the present disclosure.

Fig. 4 is a schematic diagram of a first embodiment of a second display panel according to the present disclosure.

Fig. 5 is a top view of a first electrode layer in an embodiment of a second display panel according to the present disclosure.

Fig. 6 is a top view of a leakage-stopping layer in an embodiment of a second display panel according to the present disclosure.

Fig. 7 is a top view of a leakage cutting layer and a first electrode in an embodiment of a second display panel according to the present disclosure.

Fig. 8 is a schematic diagram of a second embodiment of a second display panel according to the present disclosure.

Fig. 9 is a schematic diagram of an embodiment of a third display panel according to the present disclosure.

Fig. 10 is an electron micrograph of an embodiment of a third display panel according to the present disclosure.

Fig. 11 is a schematic diagram of an embodiment of a method for manufacturing a display panel according to the present disclosure.

Fig. 12 is a schematic diagram of an embodiment of a method for manufacturing a display panel according to the present disclosure.

Description of reference items:

In fig. 1-3:

1 - excitation backplane; 101 - substrate; 102 - active area; 1021 - source; 1022 - drain; 103 - insulating layer of the gate; 104 - shutter; 105 - first insulating layer; 106 - first layer of interconnections; 107 - second insulating layer; 108 - second layer of interconnections; 109 - leveling layer; 2 - first electrode layer; 21 - first electrode; 210 - middle part; 211 - edge part; 2110 - horizontal part; 2111 - rising part; 220 - first conductive layer; 221 - second conductive layer; 222 - third conductive layer; 3 - layer with light emitting function; 4 - second electrode; 41 - separating part; 4111 - second deepened section; 42 - flat part; 411 - protruding section; 412 - first deepened section; 4121 - first side surface; 4122 - second side surface; 5 - leak-cutting layer; 51 - first limiting layer; 511 - hole; 52 - second limiting layer; 6 - first sealing layer; 7 - color film layer; 8 - second sealing layer; 9 - transparent protective plate.

In fig. 4-8:

100 - excitation backplane; 101 - substrate; 102 - active area; 1021 - source; 1022 - drain; 103 - insulating layer of the gate; 104 - shutter; 105 - first insulating layer; 106 - first layer of interconnections; 107 - second insulating layer; 108 - second layer of interconnections; 109 - leveling layer; 200 - first electrode layer; 201 - first electrode; 210 - middle part; 211 - edge part; 2110 - horizontal part; 2111 - rising part; 220 - first conductive layer; 221 - second conductive layer; 222 - third conductive layer; 300 - leak-cutting layer; 301 - first limiting layer; 3011 - first hole; 3012 - ring-shaped hole; 302 - second limiting layer; 3021 - second hole; 3022 - groove; 400 - layer with light emitting function; 401 - light-emitting single layer; 402 - charge generation layer; 500 - second electrode; 501 - deepened section; 502 - protruding section; 503 - flat area; 600 - first sealing layer; 700 - color film layer; 800 - second sealing layer; 900 - transparent protective plate.

In fig. 9 and fig. 10:

100 - excitation backplane; 101 - substrate; 102 - active area; 1021 - source; 1022 - drain; 103 - insulating layer of the gate; 104 - shutter; 105 - first insulating layer; 106 - first layer of interconnections; 107 - second insulating layer; 108 - second layer of interconnections; 109 - leveling layer; 110 - ring-shaped groove; 200 - first electrode layer; 201 - first electrode; 210 - middle part; 211 - edge part; 2110 - horizontal part; 2111 - rising part; 220 - first conductive layer; 221 - second conductive layer; 222 - third conductive layer; 300 - leak-cutting layer; 301 - first limiting layer; 3011 - hole; 302 - second limiting layer; 400 - layer with light emitting function; 500 - second electrode; 501 - deepened section; 502 - protruding section; 503 - flat area; 600 - first sealing layer; 700 - color film layer; 800 - second sealing layer; 900 - transparent protective plate.

Carrying out the invention

Exemplary embodiments will now be described in more detail with reference to the accompanying drawings. However, exemplary embodiments may be implemented in various forms and should not be construed as limiting the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure is comprehensive and complete and fully conveys the concept of the exemplary embodiments to those skilled in the art. Like reference numerals in the figures denote the same or similar structures, and therefore detailed description thereof will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily to scale.

Although relative terms such as "upper" and "lower" are used herein to describe the relative relationship between one component and another component in the drawings, these terms are used herein for convenience only, such as the direction in the described example as shown on the drawings. It can be understood that if the device in the drawings is turned upside down, the components described as "top" become "bottom" components. When a certain structure is "on" another structure, it may mean that the structure is integrally formed on other structures, or that the structure is "directly" established on other structures, or that a certain structure is "indirectly" established on other structures through another structure.

The terms "one" and "mentioned" are used to denote the presence of one or more elements, components, etc.; The terms "include" and "have" are used to denote open means of inclusion and mean that there may be other elements, components, etc. except for the listed elements, components, etc.; the terms "first" and "second" are used as designations only and not to limit the number of objects.

In the prior art, an OLED display panel includes a drive backplane, a plurality of first electrodes, a pixel delimiting layer, a light emitting function layer, a second electrode, and a color film layer. The first electrodes are distributed on the drive backplane in the form of a matrix, the pixel delimiting layer is mounted on the surface of the drive backplane where the first electrodes are formed, and each first electrode is exposed. The light emitting function layer covers the pixel limiting layer, and the surfaces of the first electrodes facing away from the drive backplane, and the second electrode covers the surface of the light emitting function layer facing away from the drive backplane, so that a plurality of light emitting devices can be limited by the limiting pixels in a layer. When the control signal is excited, holes injected by the first electrode and electrons injected by the second electrode enter the light-emitting layer and form excitons, and the excitons emit photons of transition radiation to form electroluminescence. The color film layer is located on a side of the second electrode facing away from the drive backplane and has a plurality of filter sections corresponding to light emitting devices in one-to-one fashion, each filter section and its corresponding light emitting device being usable as a sub-pixel.

Since the thickness of the pixel-limiting layer is greater than the thickness of the first electrode, when the light-emitting function layer is formed in the evaporation process, the light-emitting function layer will be deepened at the junction of the first electrode and the pixel-limiting layer, that is, at the edge of the light-emitting device, so that the second electrode , accordingly, forms a recessed area. The distance between the recessed portion of the second electrode and the first electrode is relatively small, which is prone to corona discharge or even short circuit, which affects the stability of the light emitting device and thus makes it difficult for the display panel to emit light stably. At the same time, the recessed portion of the second electrode faces the first electrode, so light emission also occurs. However, since the shape of the recessed portion is a recessed structure toward the drive backplane rather than a planar structure, light emitted in the recessed portion is in a diffuse state, and at least a portion of the light is distorted toward adjacent subpixels, so that emission The light from adjacent subpixels interferes with each other and affects the display effect.

The light emitting function layer is recessed at a junction of the second electrode, the first electrode and the pixel delimiting layer, so that the second electrode forms a recessed portion in a portion corresponding to the recess. The recessed portion faces the first electrode, that is, the orthographic projection of the recessed portion onto the field backplane is inside the first electrode, so that a discharge or even a short circuit may occur between them. At the same time, the recessed portion can emit light, and since the shape of the recessed portion is curved, the light emitted by the recessed portion is in a diffuse state, which may interfere with the light emission of adjacent sub-pixels.

In addition, since the light emitting function layer is a continuous film layer such that the subpixels are connected to each other, at least a portion of the film layers (including, but not limited to, the hole injection layer) in the emission function layer light will cause crosstalk between adjacent subpixels. Particularly, for a tandem OLED display panel, the light emitting function layer includes a plurality of light emitting unit layers, and two adjacent light emitting unit layers are connected in series through the charge generating layer. However, the charge generation layer has good charge conductivity characteristics, which will cause crosstalk between adjacent subpixels and affect the light emitting effect.

In order to solve at least one technical problem of the prior art, embodiments of the present disclosure provide three types of display panels.

First display panel

As shown in FIG. 1-3, the display panel may include a drive backplane 1, a first electrode layer 2, a light emitting function layer 3, and a second electrode 4, where:

The first electrode layer 2 is formed on the surface of the drive backplane 1 and includes a plurality of first electrodes 21 distributed in a matrix. The first electrode 21 includes a flat middle portion 210 and an edge portion 211 surrounding the middle portion 210. The edge portion 211 includes a horizontal portion 2110 surrounding the middle portion 210 and a rising portion 2111 connected between the middle portion 210 and the horizontal portion 2110. and the thickness of the horizontal portion 2110 is less than the thickness of the middle portion 210.

The light emitting function layer 3 at least partially covers the first electrode 21.

The second electrode 4 covers the light emitting function layer 3 and includes a separating portion 41 and a plurality of flat portions 42 separated by the separating portion 41. Orthographic projections of the corresponding flat portions 42 on the drive backplane 1 are arranged within the first electrodes in a one-to-one correspondence. The separating portion 41 includes a protruding portion 411 and first recessed portions 412 connecting the protruding portion 411 and the flat portions 42. The first recessed portions 412 are recessed toward the side of the flat portions 42 close to the drive backplane 1, and the protruding portions 411 protrude into the side of the flat parts 42 facing away from the excitation backplane 1. The orthographic projections of the first recessed portions 412 onto the drive backplane 1 are at least partially located outside the middle portions 210 of the first electrode 21.

In the display panel of an embodiment of the present disclosure, each of the first electrode 21 and its corresponding light-emitting function layer 3 and the second electrode 4 can form a light-emitting device that can emit light. By making the orthographic projections of the first recessed portions 412 of the second electrodes 4 onto the field backplane 1 at least partially located outside the first electrodes 21 and not directly facing the first electrodes 21, the risk of corona discharge occurring between the first recessed portions 412 and the first electrodes 21, which promotes stable light emission of the light emitting device. At the same time, it is possible to reduce the emission of light within the first recessed portions 412, thereby reducing the mutual interference of light emitted by adjacent light-emitting devices.

As shown in FIG. 2, fig. 2 is a partial electron micrograph of an embodiment of a first display panel according to the present disclosure. It can be seen that the orthographic projections of the first recessed portions 412 on the field backplane 1 are at least partially located outside the coverage area of the first electrodes 21, which makes it possible to reduce the risk of corona discharge with the first electrode 21. At the same time, it is possible to reduce or even eliminate emission of light from the first recessed portions 412, and thus interference with adjacent subpixels can be prevented.

Each portion of the display panel of the present disclosure will be described in detail below:

As shown in FIG. 1, the drive backplane 1 may include a plurality of drive transistors for driving respective light-emitting devices to emit light for image display. Taking the drive transistor with the top gate structure as an example, the drive backplane 1 includes a substrate 101, a gate insulating layer 103, a gate 104, a first insulating layer 105, and a first interconnect layer 106. The material of the substrate 101 may be monocrystalline silicon or polycrystalline silicon, etc., which are not particularly limited herein. The substrate 101 may include an active region 102, and a source 1021 and a drain 1022 located at two ends of the active region 102. A gate insulating layer 103 covers the active region 102; and a gate 104 is provided on a surface of the gate insulating layer 103 facing away from the substrate 101. The first insulating layer 105 covers the gate 104 and the substrate 101, and its material may include at least one of silicon oxide and silicon nitride. The first interconnect layer 106 is located on a surface of the first insulating layer 105 facing away from the substrate 101, and gate 104, source 1021, and drain 1022 are connected to the first interconnect layer 106 through through holes filled with tungsten or other metal.

In addition, the drive backplane 1 may further include a second insulating layer 107 and a second interconnect layer 108 . The second insulating layer 107 covers the first interconnect layer 106 and the first insulating layer 105. The second interconnect layer 108 is provided on the first interconnect layer. The second interconnect layer 108 is provided on a surface of the second insulating layer 107 facing away from the substrate 101. The specific pattern of the second interconnect layer 108 is not particularly limited herein, and the second interconnect layer 108 may be connected to the first conductive layer 106 through through holes. filled with tungsten or other metal. At the same time, the second interconnect layer 108 may be coated with an alignment layer 109, the first electrode layer 2 may be provided on a surface of the alignment layer 109 facing away from the substrate 101, and the first electrode 21 may be connected to the second interconnect layer 108 via vias. holes filled with tungsten or other metal.

As shown in FIG. 1, the first electrode layer 2 is provided on one side of the drive backplane 1 and includes a plurality of first electrodes 21, the first electrodes 21 being distributed in a matrix. For example, the first electrodes 21 of the first electrode layer 2 are arranged in a matrix on the surface of the leveling layer 109 facing away from the substrate 101, and adjacent first electrodes 21 are spaced apart.

In the direction parallel to the drive backplane 1, the first electrode 21 may include a middle portion 210 and an edge portion 211 surrounding the middle portion 210. The middle portion 210 has a planar structure, that is, the middle portion 210 is substantially parallel to the drive backplane 1. For example, the middle portion 210 is formed on a surface of the leveling layer 109 facing away from the substrate 101 and parallel to the surface of the leveling layer 109 facing away from the substrate 101.

The edge portion 211 may include a horizontal portion 2110 and a rising portion 2111. The horizontal portion 2110 is located on the drive backplane 1 and is disposed around the middle portion 210, and the horizontal portion 2110 is substantially parallel to the drive backplane 1. For example, the horizontal portion 2110 is located on a surface of the leveling layer 109 facing away from the substrate 101 and parallel to the surface of the leveling layer 109 facing away from the substrate 101. At the same time, the thickness of the horizontal portion 2110 is less than the thickness of the middle portion 210.

The rising portion 2111 is connected between the middle portion 210 and the horizontal portion 2110, that is, the rising portion 2111 surrounds the middle portion 210, the horizontal portion 2110 is located around the rising portion 2111, and the tilt of the rising portion 2111 relative to the drive backplane 1 is at least 30°, and the tilt is the angle between the surface of the rising portion 2111 and the drive backplane 1.

In some embodiments of the present disclosure, in a direction perpendicular to the drive backplane 1, the first electrode 21 may have a multilayer structure. For example, the first electrode 21 may include a first conductive layer 220, a second conductive layer 221, and a third conductive layer 222, where:

The first conductive layer 220 is provided on a surface of the alignment layer 109 facing away from the substrate 101; a second conductive layer 221 is provided on a surface of the first conductive layer 220 facing away from the drive backplane 1; the third conductive layer 222 is formed on the surface of the second conductive layer 221 facing away from the drive backplane 1, and extends to the drive backplane 1 at a certain angle, and then continues at a certain distance along the drive backplane 1, thereby covering the first conductive layer 220 and a second conductive layer 221 for protecting the first conductive layer 220 and the second conductive layer 221. For example, the material of the first conductive layer 220 may include titanium (Ti), the material of the second conductive layer 221 may include silver (Ag), and the material of the third conductive layer 222 may include indium tin oxide (ITO). Of course, each of the conductive layers may also consist of other materials.

The middle portion 210 of the first electrode 21 includes a portion of the third conductive layer 222 located on a surface of the second conductive layer 221 facing away from the drive backplane 1, and the first conductive layer 220 and the second conductive layer 220 within an orthographic projection of the region onto the backplane 1 excitement. The horizontal portion 2110 includes a portion of the third conductive layer 222 extending along the drive backplane 1. The rising portion 2111 includes a portion of the third conductive layer 222 extending to the drive backplane 1 at a certain slope, and the first conductive layer 220 and the second conductive layer 221 within the orthographic projection of the region onto the drive backplane 1.

As shown in FIG. 1, the light emitting function layer 3 may be a continuous film layer and simultaneously cover at least a portion of a portion of each first electrode 21. In some embodiments of the present disclosure, the light emitting function layer 3 includes one unit light emitting layer, and a unit light emitting layer The layer includes a hole injection layer, a hole conduction layer, a light emitting layer, an electron conduction layer, and an electron injection layer, which are sequentially stacked from the first electrode 21 in a direction facing away from the drive backplane 1.

In another embodiment of the present disclosure, the light emitting function layer 3 includes a plurality of light emitting unit layers, and methods for distributing the hole injection layer, the hole conduction layer, the light emitting layer, the electronic conduction layer, and the electron injection layer of the corresponding unit light emitting layers are identical. At the same time, a charge generating layer is provided between two adjacent light emitting unit layers, so the corresponding light emitting unit layers are connected in series through the charge generating layers so as to form a series type OLED light emitting device.

As shown in FIG. 1, the second electrode 4 covers the light emitting function layer 3. The driving signal may be supplied to the first electrode 21 and the second electrode 4, so that a portion of the light-emitting function layer 3 located between the first electrode 21 and the second electrode 4 can emit light. The second electrode 4 includes a separating part 41 and a plurality of flat parts 42, where:

The flat parts 42 are arranged in a matrix and are arranged in a one-to-one correspondence with the middle parts 210 of the corresponding first electrode 21, that is, the orthographic projections of the corresponding flat parts 42 onto the drive backplane 1 are located in the middle part 210 of the corresponding first electrodes 21 in a one-to-one correspondence. The flat portion 42 is parallel or substantially parallel to the middle portion 210.

The separating portion 41 corresponds to a portion of the drive backplane 1 which is not covered by the middle portions 210, and is used to separate the flat portions 42. The separating portion 41 includes a raised portion 411 and a first recessed portion 412, where:

The protruding portion 411 projects toward the side of the flat portions 42 facing away from the drive backplane 1, and the first recessed portions 412 are recessed toward the side of the flat portions 42 close to the drive backplane 1; the recessed portions 412 are connected between the protruding portion 411 and the flat portions 42, that is, the first recessed portions 412 have a ring-shaped structure, the number of the first recessed portions 412 is a multiple, and the corresponding first recessed portions 412 surround the flat portions 42 in one-to-one correspondence and are connected to the protruding portion 411, that is, the first recessed portions 412 are transitional portions of the projecting portion 411 and the flat portions 42.

The orthographic projections of the first recessed portions 412 on the drive backplane 1 are at least partially located outside the middle portion 210 of the first electrode 21 so as to face portions located outside the first electrodes 21 or to be less directed toward the edge portions 211 thick but not facing the thicker middle portions 210, thereby reducing the risk of corona and short circuiting between the first recessed portions 412 of the second electrode 4 and the first electrodes 21, thereby improving the light emission stability of the light emitting device.

In some embodiments of the present disclosure, in a cross section perpendicular to the drive backplane 1, the orthographic projection of the low point of the first recessed portion 412 onto the drive backplane 1 is located outside the middle portion 210, for example, the low point faces one of the rising portions 2111 and the horizontal portion 2110, to avoid corona discharge with the middle portion 210. The low point of the first recessed portion 412 in a cross section perpendicular to the field backplane 1 is: in a cross section perpendicular to the field backplane 1, the point of the first recessed portion 412 that is closest to the first electrode 21, that is, the point furthest from the flat part 42.

It should be noted that in the embodiment of the present disclosure, the number of cross sections perpendicular to the drive backplane 1 of the first recessed portion 412 may be multiples, and the low points in different cross sections may be different. For example, the lower point may be a point closest to the first electrode 21 in the depth direction, or other points in the depth direction depending on the position of the cross section perpendicular to the drive backplane 1.

As shown in FIG. 1, in some embodiments of the present disclosure, the first recessed portion 412 has two side surfaces, including a first side surface 4121 and a second side surface 4122. The first side surface 4121 is connected to the flat portion 42, and the second side surface 4122 is connected to the raised portion 411. The first side surface 4121 and the second side surface 4122 may taper in a direction approaching the drive backplane 1. The first side surface 4121 and the second side surface 4122 may be curved or flat, which is not particularly limited herein.

Moreover, as shown in FIG. 1, in some embodiments of the present disclosure, the width S of the orthographic projection of the first recessed portion 412 onto the drive backplane 1 does not exceed 0.2 μm, that is, the maximum width of the first recessed portion 412 does not exceed 0.2 μm, for example, it is 0.1 μm or 0.2 μm, etc., to avoid the width of the first recessed portion 412 being too large, such that the orthographic projection of the first recessed portion 412 on the drive backplane 1 has an overlapped portion with the first electrode 21, or the overlapped portion is too large, which further prevents the occurrence of corona discharge.

Moreover, as shown in FIG. 1, in some embodiments of the present disclosure, the depth of the first recessed portion 412 is less than twice the maximum thickness of the second electrode 4. For example, the maximum thickness of the second electrode 4 is 90 nm. The depth of the first recessed portion 412 is less than 180 nm, for example, the depth of the first recessed portion 412 is 120 nm, 100 nm, 80 nm, 70 nm, 60 nm, 50 nm or 40 nm, etc. The depth of the first recessed portion 412 refers to the maximum depth of the first recessed portion 412, that is, in the direction perpendicular to the drive backplane 1, to the distance between the point of the first recessed portion 412 closest to the drive backplane 1 and the surface of the flat portion 42 facing away from excitation backplane 1.

Moreover, in some embodiments of the present disclosure, the orthographic projection of each first recessed portion 412 on the drive backplane 1 surrounds the outer middle portion 210 of one first electrode 21, and the minimum value of the distance between the bottom of the first recessed portion 412 and the middle portion 210 of the adjacent first electrode 21 (in the direction perpendicular to the drive backplane 1, the distance between the point of the first recessed portion 412 closest to the middle portion 210 and the middle portion 210) is not less than 70% of the total thickness of the flat portion 42 and the light emitting function layer 3. The total thickness of the flat portion 42 and the light emitting function layer 3 is the sum of the thicknesses of the flat portion 42 and the light emitting function layer 3. For example, the total thickness of the flat portion 42 and the light emitting function layer 3 is about 365 nm, the maximum value of the minimum value of the distance between the bottom portion, the length of the first recessed portion 412 in the direction perpendicular to the drive backplane 1 and the middle portion 210 of the adjacent first electrode 21 is about 255 nm.

In addition, the maximum value of the maximum value of the distance between the bottom of the first recessed portion 412 and the middle portion 210 of the adjacent first electrode 21 (in the direction perpendicular to the drive backplane 1, the distance between the point of the first recessed portion 412 closest to the middle portion 210 and the middle portion 210 ), is not less than 400 nm, and the maximum value is not more than 450 nm.

Moreover, as shown in FIG. 1, the slope of the first side surface 4121 relative to the middle portion 210 of the first electrode 21 is less than the slope of the second side surface 4122 relative to the middle portion 210, that is, the first side surface 4121 is flatter than the second side surface 4122. For example, the slope of the first side surface 4121 relative to the middle portion 210 may be less than 60°, for example, may be 50°, 45°, 40°, 30°, etc., and the inclination of the second side surface 4122 relative to the middle portion 210 is not less than 60° and not more than 90 °, for example, can be 60°, 75°, 90°, etc. The inclination of the first side surface 4121 relative to the middle part 210 is: the angle b between the extension surface of the first side surface 4121 and the extension surface of the middle part 210 facing away from the drive backplane 1. The inclination of the second side surface 4122 relative to the middle part 210 is: the angle b between the extension surface of the second side surface 4122 and the extension surface of the middle part 210 facing away from the drive backplane 1.

Moreover, in some embodiments of the present disclosure, the slope of the first side surface 4121 relative to the middle portion 210 is less than the slope of the second side surface 4122 relative to the middle portion 210, and the minimum thickness of the portion of the second electrode 4 corresponding to the first side surface 4121 is greater than the minimum thickness of the second portion electrode 4 corresponding to the second side surface 4122.

Of course, in other embodiments of the present disclosure, the slope of the first side surface 4121 relative to the middle portion 210 may also be equal to the slope of the second side surface 4122 relative to the middle portion 210.

In some embodiments of the present disclosure, the protruding portion 411 has a second recessed portion 4111 recessed toward the drive backplane 1, and the depth of the second recessed portion 4111 is less than the depth of the first recessed portion 412.

In order to facilitate the formation of the second electrode 4 mentioned above, in some embodiments of the present disclosure, the display panel according to the present disclosure further includes a leakage cutting layer 5. The leakage cutting layer 5 is made of an insulating material and is provided with a first electrode layer 2 on one side the same surface of the excitation backplane 1. The leak-stop layer 5 at least partially exposes the respective first electrodes 21. For example, the leak-stop layer 5 is provided with a plurality of openings that at least partially expose the middle portions 210. The light-emitting layer 3 covers the leak-stop layer 5 and extends into the openings with so as to cover at least a portion of the middle portions 210. Through the leakage cutting layer 5, the light emitting function layer 3 may be provided with recesses to form first recessed portions 412 of the second electrode 4.

As shown in FIG. 1 and 2, in some embodiments of the present disclosure, the leakage containment layer 5 includes a first containment layer 51 and a second containment layer 52, wherein:

The first limiting layer 51 and the first electrode layer 2 are formed on the same surface of the drive backplane 1, the first limiting layer 51 has a plurality of holes 511, and the corresponding first electrodes 21 are formed in the holes 511 in a one-to-one correspondence. Between the edge portion 211 of each first electrode 21 and the side wall of the hole 511 where the first electrode 21 is located, a spatial region X is formed to expose the drive backplane 1.

In some embodiments of the present disclosure, the materials of the leveling layer 109, the first confinement layer 301 and the second confining layer 52 may include silicon oxide and silicon nitride, and the materials of three of them are the same, for example, each of the leveling layer 109, the first confining layer 51 and the second confining layer 52 is made of silicon oxide. When the first boundary layer 51 is formed in the etching process, the position of the spatial region X is over-etched, and the re-etched portion extends along the side wall of the hole 511 in the drive backplane 1, so that at least a portion of the portion of the drive backplane 1 located in the spatial region X is is also etched to form an annular groove 110, that is, the leveling layer 109 is etched.

The second limiting layer 52 covers the first limiting layer 51 and a portion of the drive backplane 1 located in the spatial region X, and at least partially exposes the middle portion 210 of the first electrode 21. The second limiting layer 52 is recessed towards the drive backplane 1 in the spatial region X and in the portion corresponding to the edge portion 211, and the thickness of the second boundary layer 52 is less than the thickness of the first boundary layer 51.

The light emitting function layer 3 covers the second limiting layer 52. Due to the limitation of the evaporation process, the light emitting function layer 3 forms recessed portions in portions corresponding to the spatial regions X and the edge portions 211. The second electrode 4 is recessed into the recesses to form the first recessed portions 412 so that the orthographic projections of the first recessed portions 412 on the drive backplane 1 are at least partially located within the spatial region X or the edge portions 211 to be located outside the middle portions 210, thereby avoiding discharge between the first recessed portions portions 412 and middle portions 210. In addition, orthographic projections of the lower points of the first recessed portions 412 onto cross sections perpendicular to the drive backplane 1 onto the drive backplane 1 are located within the spatial region X or the edge portions 211.

As shown in FIG. 3, in some other embodiments of the present disclosure, the leakage containment layer 5 includes a first containment layer 51 and a second containment layer 52, where:

The first limiting layer 51 and the first electrode layer 2 are located on the same surface of the drive backplane 1, and the second limiting layer 52 is located on the surface of the first limiting layer 51 facing away from the drive backplane 1. Both the first boundary layer 51 and the second boundary layer 52 at least partially expose the middle portion 210 of the first electrode 21. The orthographic projection of the first boundary layer 51 onto the drive backplane 1 abuts the edge of the edge portion 211, or covers the edge portion 211 and the edge of the middle part 210. The edge of the orthographic projection of the layer 52 onto the drive backplane 1 is located outside the middle portion 210, so the second boundary layer 52 can be considered as a protrusion formed on the surface of the first boundary layer 51 facing away from the drive backplane 1.

The light emitting function layer 3 covers the second confining layer 52. Due to the restriction of the evaporation process, the light emitting function layer 3 forms a recessed portion on the side wall of the area where the second confining layer 52 exposes the first electrode 21, the recess facing the portion of the first confining layer 51 , not covered by the second limiting layer 52, and the orthographic projection of the recess onto the drive backplane 1 is located outside the middle portion 210 of the first electrode 21. At the same time, the light emitting function layer 3 forms a convex structure at a position corresponding to the second limiting layer 52.

The above-mentioned first boundary layer 51 and second boundary layer 52 may be made of the same material and may be formed in a single patterning process, or the first boundary layer 51 and the second boundary layer 52 may also be formed separately and may be formed from different materials.

When the second electrode 4 covers the light emitting function layer 3, the second electrode 4 is recessed into the recesses of the light emitting function layer 3 to form the first recessed portions 412, and the raised portion 411 is formed at the position of the convex structure. The orthographic projection of the first recessed portion 412 on the drive backplane 1 is located between the orthographic projections of the middle portion 210 and the second limiting layer 52 on the drive backplane 1, and the second limiting layer 52 is located within the orthographic projection of the raised portion 411 on the leakage cut-off layer 5.

In addition to this, as shown in FIG. 1 and 3, the first display panel according to the present disclosure may further include a first sealing layer 6, a color film layer 7, a second sealing layer 8, and a transparent protective sheet 9, where:

The first sealing layer 6 may cover the second electrode 4, for example, the first sealing layer 6 may include two inorganic layers and an organic layer between two inorganic layers.

The color film layer 7 is disposed on a side of the first sealing layer 6 facing away from the second electrode 4, and the color film layer 7 includes filter portions in one-to-one correspondence with the corresponding first electrodes 21. The filter portions have a variety of colors, such as red, blue and green.

The second sealing layer 8 may cover the color film layer 7, and its structure may be the same as that of the first sealing layer 6.

The transparent protective plate 9 may cover the second sealing layer 8, and its material may be glass or material.

Second display panel

As shown in FIG. 4, the display panel includes a drive backplane 100, a first electrode layer 200, a leakage cutting layer 300, a light emitting function layer 400, and a second electrode 500, where:

The first electrode layer 200 is provided on the surface of the drive backplane 100 and includes a plurality of first electrodes 201 distributed in a matrix, the first electrode 201 includes a flat middle portion 210 and an edge portion 211 surrounding the middle portion 210, the edge portion 211 includes itself a horizontal portion 2110 surrounding the middle portion 210, and a rising portion 2111 connected between the middle portion 210 and the horizontal portion 2110, and the thickness of the horizontal portion 2110 is less than the thickness of the middle portion portion 210.

The leakage cutting layer 300 and the first electrode layer 200 are provided on the same surface of the drive backplane 100, and the leakage cutting layer 300 includes a first boundary layer 301 and a second boundary layer 302 laminated in a direction facing away from the backplane 100 excitement. The first boundary layer 301 is provided with first openings 3011 exposing the middle portions 210 of the respective first electrodes 201 in a one-to-one correspondence. The second boundary layer 302 is provided with second holes 3021, respectively, surrounding the first holes 3011 at positions corresponding to the first holes 3011. The orthographic projection of the second boundary layer 302 onto the drive backplane 100 and the middle portions 210 are spaced at a certain distance from each other. The first boundary layer 301 is provided with a plurality of annular holes 3012 having a blind hole pattern surrounding the corresponding first holes 3011 in a one-to-one correspondence. The second constraint layer 302 is located on the surface of the first constraint layer 301 facing away from the drive backplane 100 and is located outside the ring-shaped holes 3012.

The light emitting function layer 400 at least partially covers the leakage cutting layer 300 and the middle portions 210 of the first electrodes 201.

The second electrode 500 covers the light emitting function layer 400.

In the display panel of an embodiment of the present disclosure, each of the first electrode 201 and its corresponding light emitting function layer 400 and the second electrode 500 may form a light emitting device for emitting light.

Since the second hole 3021 externally surrounds the first hole 3011, that is, the second hole 3021 is larger than the first hole 3011, the two holes can form a stepped hole such that the first boundary layer 301 has a portion located in the second hole 3021 and exposed by the second hole 3021. the same time, since the orthographic projection of the second confinement layer 302 on the drive backplane 100 and the middle portions 210 of the first electrodes 201 are located at a certain distance from each other, and the orthographic projection of the second boundary layer 302 on the drive backplane 100 is located outside the annular holes 3012, If the light emitting function layer 400 is formed with recesses in areas contacting the side walls of the second openings 3021 for processing reasons, the recess may at least partially face the annular opening 3012 of the first boundary layer 301 exposed by the second opening 3021 and may not faces the middle portion 210 of the first electrode 201.

Accordingly, the bottom point of the recessed portion 501 of the second electrode 500 formed after the second electrode 500 has been recessed into the recess, in a cross section perpendicular to the drive backplane 1, does not face the middle portion 210, that is, an orthographic projection of the bottom point of the recessed portion 501 of the second electrode 500 to a cross section perpendicular to the drive backplane 1, to the drive backplane 100 is located outside the middle portion 210, that is, outside the light emitting device, so it can prevent corona discharge or even a short circuit from occurring between the recessed portion 501 and the middle portion 210 of the first electrode 201, thereby ensuring that the light emitting device stably emits light. At the same time, it is possible to avoid emitting light within the recessed portion 501, thereby reducing mutual interference of light emitted by adjacent light emitting devices.

Each part of the second display panel of an embodiment of the present disclosure will be described in detail below.

As shown in FIG. 4, the drive backplane 100 may include a plurality of drive transistors for driving a corresponding light-emitting device to emit light for image display. Taking a drive transistor with a top gate structure as an example, the drive backplane 100 includes a substrate 101, a gate insulating layer 103, a gate 104, a first insulating layer 105, and a first interconnect layer 106. The material of the substrate 101 may be monocrystalline silicon or polycrystalline silicon, etc., which are not particularly limited herein. The substrate 101 may include an active region 102, and a source 1021 and a drain 1022 located at two ends of the active region 102. A gate insulating layer 103 covers the active region 102, and a gate 104 is provided on the surface of the gate insulating layer 103 facing away from the substrate. 101. The first insulating layer 105 covers the gate 104 and the substrate 101, and its material may include at least one of silicon oxide and silicon nitride. The first interconnect layer 106 is located on a surface of the first insulating layer 105 facing away from the substrate 101, and the gate 104, source 1021, and drain 1022 are connected to the first interconnect layer 106 through through holes filled with tungsten or other metal.

In addition, the drive backplane 100 may further include a second insulation layer 107 and a second interconnect layer 108 . The second insulating layer 107 covers the first interconnect layer 106 and the first insulating layer 105. The second interconnect layer 108 is provided on a surface of the second insulating layer 107 facing away from the substrate 101. The specific pattern of the second interconnect layer 108 is not particularly limited herein, and may be connected to the first interconnect layer 106 through holes filled with tungsten or other metal. At the same time, the second interconnect layer 108 may be coated with an alignment layer 109, the first electrode layer 200 may be provided on a surface of the alignment layer 109 facing away from the substrate 101, and the first electrode 201 may be connected to the second interconnect layer 108 via vias. holes filled with tungsten or other metal.

As shown in FIG. 4, the first electrode layer 200 is disposed on a surface of the drive backplane 100 and includes a plurality of first electrodes 201, the first electrodes 201 being distributed in a matrix. For example, respective first electrodes 201 of the first electrode layer 200 are arranged in a matrix on the surface of the alignment layer 109 facing away from the substrate 101, and adjacent first electrodes 201 are spaced apart from each other.

In a direction parallel to the drive backplane 100, the first electrode 201 may include a middle portion 210 and an edge portion 211 surrounding the middle portion 210. The middle portion 210 has a planar structure, that is, the middle portion 210 and the drive backplane 100 are substantially parallel. For example, the middle portion 210 is formed on a surface of the leveling layer 109 facing away from the substrate 101 and parallel to the surface of the leveling layer 109 facing away from the substrate 101.

The edge portion 211 may include a horizontal portion 2110 and a rising portion 2111. The horizontal portion 2110 is located on the drive backplane 100 and is disposed around the middle portion 210, and the horizontal portion 2110 is substantially parallel to the drive backplane 100. For example, the horizontal portion 2110 is located on a surface of the leveling layer 109 facing away from the substrate 101 and parallel to the surface of the leveling layer 109 facing away from the substrate 101. At the same time, the thickness of the horizontal portion 2110 is less than the thickness of the middle portion 210.

The rising portion 2111 is connected between the middle portion 210 and the horizontal portion 2110, that is, the rising portion 2111 surrounds the middle portion 210, and the horizontal portion 2110 is located around the rising portion 2111. The inclination of the rising portion 2111 relative to the drive backplane 100 is at least 30°, and the inclination represents the angle between the surface of the rising portion 2111 and the drive backplane 100 .

In some embodiments of the present disclosure, the first electrode 201 includes a flat middle portion 210 and an edge portion 211 surrounding the middle portion 210, and an orthographic projection of the bottom of the recessed portion 501 in a cross-section perpendicular to the drive backplane 1 onto the drive backplane 100, located outside the middle portion 210 of the first electrode 201.

The first electrode 201 includes a first conductive layer 220, a second conductive layer 221, and a third conductive layer 222. The first conductive layer 220 is provided on a surface of the alignment layer 109 facing away from the substrate 101, and the second conductive layer 221 is provided on a surface of the first conductive layer 220. facing away from the drive backplane 100, and the third conductive layer 222 is formed on the surface of the second conductive layer 221 facing away from the drive backplane 100 and extends to the drive backplane 100 at a certain angle, thereby covering the first conductive layer 220 and a second conductive layer 221 for protecting the first conductive layer 220 and the second conductive layer 221.

The middle portion 210 of the first electrode 21 includes a portion of the third conductive layer 222 located on a surface of the second conductive layer 221 facing away from the drive backplane 1, and the first conductive layer 220 and the second conductive layer 220. The edge portion 211 includes a portion a third conductive layer 222 covering an edge of the first conductive layer 220 and the second conductive layer 221, that is, a portion extending to the drive backplane 100. For example, the material of the first conductive layer 220 may include titanium (Ti), the material of the second conductive layer 221 may include silver (Ag), and the material of the third conductive layer 222 may include indium tin oxide (ITO). Of course, each of the conductive layers can also be made of other materials.

As shown in FIG. 4, the leakage cut-off layer 300 is made of an insulating material and is located on the same surface of the drive backplane 100 as the first electrode layer 200, for example, on the surface of the leveling layer 109 facing away from the substrate 101. The leakage cut-off layer 300 includes a first boundary layer 301 and a second boundary layer 302, where:

The first limiting layer 301 and the first electrode layer 200 are provided on the same surface of the drive backplane 100, and the first limiting layer 301 is provided with first openings 3011 exposing the respective middle portions 210 in a one-to-one correspondence. The first opening 3011 exposes at least a portion of a portion of the middle portion 210, and the first boundary layer 301 covers the edge portion 211. In some embodiments of the present disclosure, the first boundary layer 301 may cover the edge of the first opening 3011 and may cover the edge of the middle portion 210, and the thickness of the first limiting layer 301 may be greater than, equal to, or less than the thickness of the first electrode 201. In addition, in other embodiments of the present disclosure, the first opening 3011 may also be smaller than the middle portion 210, and the thickness of the first limiting layer 301 is greater than the thickness of the middle portion 210, such that that the first limiting layer 301 covers the edge of the middle portion 210 and the edge portion 211 of the first electrode 201, thereby preventing corona from occurring at the edge of the first electrode 201.

As shown in FIG. 6 and 7, the first boundary layer 301 may be provided with a plurality of annular openings 3012 surrounding corresponding first openings 3011 in a one-to-one correspondence. The ring-shaped holes 3012 have a blind hole structure, that is, they are recessed towards the drive backplane 100 but do not expose the drive backplane 100. The second boundary layer 302 is formed on a portion of the surface of the first boundary layer 301 facing away from the drive backplane 100 that is not surrounded by the annular hole 3012, that is, the second boundary layer 302 is formed outside the annular holes 3012 so as not to overlap the annular hole 3012. In the presence of the ring-shaped holes 3012, it is preferable to further cut off the charge generation layer 402 of the light emitting function layer 400 to avoid cross-talk between adjacent light emitting devices.

The second limiting layer 302 is formed on the surface of the first limiting layer 301 facing away from the drive backplane 100. The orthographic projections of the second limiting layer 302 onto the drive backplane 100 and the middle portions 210 of the first electrodes 201 are spaced at a certain distance from each other, so that the orthographic projection of the second limiting layer 302 on the drive backplane 100 is located outside the middle portions 210. At the same time , the second boundary layer 302 is provided with a second hole 3021 surrounding the first hole 3011 at a position corresponding to the first hole 3011, so that any of the first holes 3011 and the second hole 3021 surrounding the first hole 3011 can form a stepped hole, and the second hole 3021 opens the area a first boundary layer 301 located in a second opening 3021.

The above-mentioned first boundary layer 301 and second boundary layer 302 may be made of the same material and may be formed in one single patterning process, or the first boundary layer 301 and the second boundary layer 302 may be formed separately and may be formed from different materials.

As shown in FIG. 4, the light emitting function layer 3 may be a continuous film layer and simultaneously cover at least a portion of the middle portion 210 of each first electrode 201. In the embodiment of the present disclosure, as shown in FIG. 4, the light emitting function layer 400 includes a plurality of layers of light emitting unit layers 401, and the distribution methods of the hole injection layer, hole conduction layer, light emitting layer, electronic conduction layer and electron injection layer of the respective light emitting unit layers 401 are the same. . At the same time, the charge generation layer 402 is provided between two adjacent light emitting unit layers 401, so that the respective light emitting unit layers 401 are connected in series through the charge generation layer 402 to form a series type OLED light emitting device.

In other embodiments of the present disclosure, the light emitting function layer 400 includes one unit light emitting layer, and the unit light emitting layer includes a hole injection layer, a hole conduction layer, a light emitting layer, an electron conduction layer, and an electron injection layer. which are sequentially stacked from the first electrode 201 in a direction facing away from the drive backplane 100.

When the light emitting function layer 400 is formed in the evaporation process, the edge of a portion of the light emitting function layer 400 located in the second hole 3021 is recessed toward the drive backplane 100 along the side wall of the second hole 3021 to form a recessed portion, and the recessed portion can be faces the annular hole 3012 exposed by the second hole 3021. At the same time, a portion of the light emitting function layer 400 corresponding to the second boundary layer 302 forms a convex structure.

As shown in FIG. 4, the second electrode 500 covers the light emitting function layer 400. A driving signal may be applied to the first electrode 201 and the second electrode 500 so that a portion of the light-emitting function layer 400 located between the first electrode 201 and the second electrode 500 emits light.

The shape of the second electrode 500 corresponds to the shape of the light emitting function layer 400, forming recessed portions 501 in the recesses of the light emitting function layer 400, and forming a raised portion 502 in a portion corresponding to the convex structure of the second confining layer 302. The recessed portions 501 correspond to the annular hole 3012, therefore the orthographic projection of the recessed portion 501 on the drive backplane 100 is at least partially located outside the middle portion 210 of the first electrode 201, thereby reducing or avoiding corona discharge occurring between the first electrode 201 and the recessed portion 501 of the electrode 500. In addition, the portions of the second electrode 500 corresponding to the middle portions 210 are flat portions 503. The connection relationship of the recessed portions 501, the raised portion 502, and the flat portions 503 may refer to the raised portions 411, the first recessed portions 412, and the flat portions 42 in the above embodiment of the first display panels and will not be described in detail here.

Moreover, as shown in FIG. 4 and 5, in some embodiments of the present disclosure, to ensure that the orthographic projection of the bottom point of the recessed portion 501 of the second electrode 500 onto a cross section perpendicular to the drive backplane 1 onto the drive backplane 100 is completely outside the middle portion 210, the distance L between the side wall of the second hole 3021 and the edge of the middle portion 210 surrounded by the second hole 3021 in a direction parallel to the middle portion 210 is not less than 1/5 of the maximum distance H between the middle portions 210 of two adjacent first electrodes 201. For example, if the maximum distance between two adjacent middle portions 210 is 1 μm, then L is 0.2 μm, 0.1 μm, etc., so that the orthographic projection of the recessed portion 501 onto the first boundary layer 301 is located between the side wall of the second hole 3021 and the middle portion 210, that is, the orthographic projection of the recessed portion 501 onto the drive backplane 100 is made outside the middle portions 210, which further prevents corona discharge.

In other embodiments of the present disclosure, as shown in FIG. 4, the side wall of the second hole 3021 may be perpendicular to the drive backplane 100 so that the cross-section of the portion of the second boundary layer 302 located between the two middle portions 210 is rectangular.

In other embodiments of the present disclosure, as shown in FIG. 8, the side wall of the second hole 3021 extends in a direction away from the drive backplane 100 so that the cross-section of the portion of the second boundary layer 302 located between the two middle portions 210 is trapezoidal. At the same time, the included angle between the side wall of the second hole 3021 and the middle part 210, that is, the included angle r between the extension surface of the side wall of the second hole 3021 and the extension surface of the middle part 210 facing away from the drive backplane 100, is not less than 60° and not more than 90°, for example it can be 60°, 65°, 70°, 80° or 90°.

For a tandem OLED display panel, to avoid crosstalk between two adjacent light emitting devices, the light emitting device charge generating layer 402 may be cut off by the leakage cutting layer 300

Of course, the hole injection layer or other film layers can also be cut off in order to prevent crosstalk.

As shown in FIG. 4, in some embodiments of the present disclosure, the light emitting function layer 400 includes a plurality of unit light emitting layers 401, and methods for distributing the hole injection layer, the hole conduction layer, the light emitting layer, the electron conduction layer, and the electron injection layer of the corresponding unit the light emitting layers 401 are the same. At the same time, the charge generation layer 402 is provided between two adjacent light emitting unit layers 401, so that the light emitting unit layers 401 are connected in series through the charge generation layer 402 to form a series type OLED light emitting device.

In the direction perpendicular to the drive backplane 100, the distance between the surface of the second limiting layer 302 facing away from the drive backplane 100 and the surface of the middle portion 210 of the first electrode 201 facing away from the drive backplane 100, that is, the height of the second limiting layer 302 relative to the middle portion 210 is not less than 25% of the thickness of the light emitting function layer 400 and not more than 80% of the thickness of the light emitting function layer 400. The step formed by the second confinement layer 302 allows the charge generation layer 402, hole injection layer, or other high conductivity film layers to be generated from the detached light emitting function layer 400, thereby avoiding crosstalk between adjacent light emitting devices. For example, if the thickness of the light emitting function layer 400 is 400 nm, the height of the second limiting layer 302 relative to the middle portion 210 is no more than 320 nm and no less than 100 nm. If the thickness of the light emitting function layer 400 is 300 nm, the height of the second limiting layer 302 relative to the middle portion 210 is no more than 75 nm and no less than 25 nm.

Moreover, as shown in FIG. 4, 6, and 7, grooves 3022 may be provided in portions of the second boundary layer 302 located outside the second openings 3021. The charge generation layer 402 may be overlapped by the groove 3022, which is useful for further trimming the charge generation layer 402 to better prevent crosstalk. . The shape and structure of the groove 3022 is not particularly limited herein, and its depth is less than the depth of the recessed portion 501. The number of grooves 3022 distributed in a concentric ring shape may be one or more.

Moreover, as shown in FIG. 4, the width of the groove 3022 is smaller than the distance between the middle portions 210 of two adjacent electrodes of the first electrodes 201. For example, if the distance between two adjacent middle portions s 210 is 0.1 μm to 1 μm, the maximum width of the groove 3022 is 1 μm. At the same time, to ensure the cutting effect of the groove 3022, the width may be selected to be greater than 0.2 μm, so that the groove 3022 has a certain span, and thus the charge generating layer 402 can be cut due to the presence of the groove 3022.

In addition, the first display panel according to the present disclosure may further include a first seal layer 600, a color film layer 700, a second seal layer 800, and a transparent protective sheet 900, wherein the first seal layer 600 may cover the second electrode 500. For example, the first the sealing layer 600 may include two inorganic layers and an organic layer between the two inorganic layers.

The color film layer 700 is disposed on a side of the first sealing layer 600 facing away from the second electrode 500, and the color film layer 700 includes filter regions in one-to-one correspondence with the corresponding first electrodes 201. The color film regions have a plurality of colors, such as red , blue and green.

The second seal layer 800 may cover the color film layer 700, and its structure may be the same as that of the first seal layer 600.

The transparent protective plate 900 may cover the second sealing layer 800, and its material may be glass or other material.

Third display panel

As shown in FIG. 9 and 10, the third display panel may include a drive backplane 100, a first electrode layer 200, a leakage cutoff layer 300, a light emitting function layer 400, and a second electrode 500, where:

The first electrode layer 200 is located on a surface of the drive backplane 100 and includes a plurality of first electrodes 201 distributed in a matrix. The first electrode 201 includes a flat middle portion 210 and an inclined edge portion 211 surrounding the middle portion 210. The edge portion 211 includes a horizontal portion 2110 surrounding the middle portion 210 and a rising portion 2111 connected between the middle portion 210 and the horizontal portion 2110 The thickness of the horizontal part 2110 is less than the thickness of the middle part 210.

The leakage cut-off layer 300 includes a first limiting layer 301 and a second limiting layer 302. The first limiting layer 301 and the first electrode layer 200 are formed on the same surface of the drive backplane 100 and have a plurality of holes 3011. The corresponding first electrodes 201 are formed in the holes 3011 in mutually one-to-one correspondence, that is, each hole 3011 of the first confining layer 301 is provided with a first electrode 201. Between the edge portion 211 of each first electrode 201 and the side wall of the hole 3011 where the first electrode 201 is located, a spatial region X is formed to expose the drive backplane 100. The second limiting layer 302 covers the first limiting layer 301 and the driving backplane 100 located in the spatial region X, and opens the middle part 210 of the first electrode 201, and the second limiting layer 302 is recessed towards the driving backplane 100 in the spatial region X and in the portion corresponding to the edge portion 211, that is, the second boundary layer 302 corresponds to the surfaces of the first boundary layer 301 and the drive backplane 100.

The light emitting function layer 400 covers at least the second boundary layer 302 and the middle portion 210 of the first electrode 201, and the second electrode 500 covers the light emitting function layer 400.

In the third display panel according to the present disclosure, since the second boundary layer 302 is recessed in the spatial region X towards the drive backplane 100, the recesses formed by the light emitting function layer 400 may be located at positions corresponding to the spatial regions X for technological reasons or edge portions 211, and do not face the middle portions 210. Accordingly, the recessed portions 501 of the second electrode 500 formed after the second electrode 500 is recessed do not face the middle portions 210, that is, an orthographic projection of the bottom point of the recessed portion 501 of the second electrode 500 to a cross section perpendicular to the drive backplane 1, to the drive backplane 100, is located outside the middle portion 210, that is, outside the light emitting device, so that a discharge or even a short circuit, which ensures that the light emitting device emits light stably. At the same time, light emission within the recessed portion 501 can be avoided, thereby reducing mutual interference of light emitted by adjacent light-emitting devices.

Below is a detailed description of the third display panel.

As shown in FIG. 9 and 10, the specific structures of the drive backplane 100 and the first electrode layer 200 of the third display panel may refer to the above-mentioned second display panel, which is not described in detail herein.

In some embodiments of the present disclosure, the drive backplane 100 includes a substrate 101, drive transistors, and an equalization layer 109. The substrate 101 may be a silicon substrate, and the drive transistors are provided on the side of the substrate 101. The equalization layer 109 is provided on the side of the drive transistor facing away from the substrate 101. The first electrode layer 200 and the leakage cut-off layer 300 are provided on a surface of the leveling layer 109 facing away from the substrate 101.

In particular, the drive backplane 100 may be a silicon-based backplane and may include a substrate 101, a gate insulating layer 103, a gate 104, a first insulating layer 105, a first interconnect layer 106, a second insulating layer 107, a second interconnect layer 108, and alignment layer 109. The substrate 101 includes an active region 102, and the active region 102 has a source electrode 1021 and a drain electrode 1022, the specific structure of which may be related to the implementation of the second display panel. The first confinement layer 301 and the first electrode 201 may be provided on a surface of the alignment layer 109 facing away from the substrate 101. The materials of the alignment layer 109, the first constraint layer 301, and the second constraint layer 302 may include insulating materials such as silicon oxide and silicon nitride.

In some embodiments of the present disclosure, the thickness of the first boundary layer 301 may be greater than the thickness of the first electrode layer 200 to cut off layers, such as the hole injection layer in the light emitting function layer 400, that may produce crosstalk between two adjacent subpixels.

In some embodiments of the present disclosure, the first electrode 201 includes a first conductive layer 220, a second conductive layer 221, and a third conductive layer 222. The first conductive layer 220 is provided on a surface of the alignment layer 109 facing away from the substrate 101. The second conductive layer 221 is provided on the surface of the first conductive layer 220 facing away from the drive backplane 100. The third conductive layer 222 is located on the surface of the second conductive layer 221 facing away from the drive backplane 100 and extends to the drive backplane 100 at a certain angle to cover the first conductive layer 220 and the second conductive layer 221 and protect the first conductive layer 220 and the second conductive layer 221. The middle portion 210 of the first electrode 201 includes a portion of the third conductive layer 222 located on the portion of the second conductive layer 221 facing away from the surface of the drive backplane 100, and the first conductive layer 220 and the second conductive layer 221. The edge portion 211 includes a portion of the third conductive layer 222 covering the edge of the first conductive layer 220 and the second conductive layer 221, that is, the portion extending to the drive backplane 100. For example, the material of the first conductive layer 220 may include titanium (Ti), the material of the second conductive layer 221 may include silver (Ag), and the material of the third conductive layer 222 may include indium tin oxide (ITO). Of course, each of the conductive layers can also be made of other materials.

In some embodiments of the present disclosure, the thickness of the second boundary layer 302 is less than the thickness of the first boundary layer 301. In addition, the thickness of the second boundary layer 302 may be less than 1/5 the thickness of the first boundary layer 301, thereby avoiding disruption of the formation of the recessed structure due to space filling region X and the edge portion 211. For example, the thickness of the first limiting layer 301 is about 350 nm, and the thickness of the second limiting layer 302 does not exceed 70 nm, for example, the thickness of the second limiting layer 302 is 60 nm, 50 nm, etc.

In some embodiments of the present disclosure, the drive backplane 100 is provided with an annular groove 110 surrounding the first electrode 201 in each space region X, and a portion of the second boundary layer 302 located on the space region X is recessed into the annular groove 110. For example, the annular groove 110 is formed on the leveling layer 109, and the depth of the annular groove 110 is less than the thickness of the leveling layer 109, and the specific thickness is not particularly limited herein.

Specifically, the materials of the leveling layer 109, the first confining layer 301 and the second confining layer 302 may include silicon oxide and silicon nitride, and the materials of the three layers are the same, for example, each of the leveling layer 109, the first confining layer 301 and the second confining layer 302 made of silicon oxide. When the first boundary layer 301 is formed in the etching process, the position of the spatial region X is subjected to over-etching, and the re-etched portion extends along the side wall of the hole 3011 into the drive backplane 100, so that at least a portion of the portion of the drive backplane 100 located in the spatial region X is is also etched to form the annular groove 110, that is, the alignment layer 109 is etched. In some embodiments of the present disclosure, the orthographic projection of the annular groove 110 on the drive backplane 100 overlaps the spatial region X, that is, the side wall of the annular groove 110 is the edge of the spatial region X Of course, the overetched portion may be smaller than the spatial region X, so that the side wall of the annular groove 110 and the edge 211 of the first electrode 201 may be at a certain distance between them. In some embodiments of the present disclosure, the inclination b of the portion of the second electrode 500 covering the side wall of the hole 3011 relative to the middle portion 210 of the first electrode 201 is no less than 65° and no more than 90° and may be, for example, 60°, 75°, 90° etc. The inclination in the portion of the second electrode 500 between the middle portion 210 and the annular groove 110 relative to the middle portion 210 is less than 60° and may be, for example, 50°, 45°, 40°, 30°, etc.

As shown in FIG. 9 and 10, the light-emitting function layer 400 covers at least a portion of a portion of the second boundary layer 302 and the first electrode 201. When the light-emitting function layer 400 is formed in the evaporation process, portions of the light-emitting function layers 400 located in spatial regions X , are recessed towards the excitation backplane 100 to form recesses. At the same time, a portion of the light emitting function layer 400 corresponding to the first boundary layer 301 forms a convex structure. Specific details of the light emitting function layer 400 may relate to the implementation of the second display panel, which is not described in detail herein.

As shown in FIG. 9 and 10, the second electrode 500 covers the light emitting function layer 400 and is recessed into the recesses of the light emitting function layer 400 to form the recessed portions 501. Due to the limitation of the recesses, the orthographic projections of the bottom points of the recessed portions 501 are on cross sections perpendicular to the backplane The drive 100, on the drive backplane 10000, are located within the spatial region X or the edge portions 211, that is, located outside the middle portions 210, that is, located outside the light emitting device, thereby preventing the occurrence of corona discharge or even a short circuit between the recessed portions 501 the second electrodes 500 and the first electrodes 201, which is preferable to ensure that the light emitting device stably emits light. At the same time, light emission within the recessed portion 501 can be avoided, thereby reducing mutual interference of light emitted by adjacent light-emitting devices. In addition, the portion of the second electrode 500 corresponding to the first boundary layer 301 is a raised portion 502, and the portions of the second electrode 500 corresponding to the middle portions 210 are flat portions 503. Connection relationship between the recessed portions 501, the raised portion 502, and the flat portions The portions 503 may refer to the raised portions 411, the first recessed portions 412, and the flat portions 42 in the above embodiment of the first display panel and will not be described in detail here.

In addition to this, as shown in FIG. 9 and 10, the display panel according to the present disclosure may further include a first sealing layer 600, a color film layer 700, a second sealing layer 800, and a transparent protective plate 900, the specific structures of which may be related to the implementation of the first type and second type of display panel presented above, which is not described in detail here.

Embodiments of the present disclosure further provide a method for manufacturing a display panel, and the display panel may be the second type of display panel described above. As shown in FIG. 11, the manufacturing method includes steps S110 to S140, where:

In step S110, a first electrode layer is formed on the surface of the drive backplane, the first electrode layer includes a plurality of first electrodes distributed in an array, the first electrode includes a flat middle portion and an edge portion surrounding the middle portion, the edge portion includes a horizontal portion surrounding the middle portion, and a rising portion connected between the middle portion and the horizontal portion, and the thickness of the horizontal portion is less than the thickness of the middle portion.

In step S120, a leakage cutting layer is formed on a surface of the drive backplane where the first electrode layer is formed, the leakage cutting layer including a first boundary layer and a second boundary layer that are sequentially stacked in a direction facing away from the drive backplane, the first the confining layer is provided with first openings exposing the respective first electrodes in a one-to-one correspondence, the second confining layer is provided with second openings externally surrounding the first openings at positions corresponding to the first openings, the orthographic projection of the second confining layer onto the drive backplane and the middle parts are located at a certain distance from each other from each other, the first boundary layer is provided with a plurality of annular holes with a blind hole pattern surrounding the first holes in a one-to-one correspondence, and the second boundary layer is provided on a surface of the first boundary layer facing away from the drive backplane and located outside the annular holes.

In step S130, a light emitting function layer covering at least the leakage cutting layer and the middle portion is formed.

In step S140, a second electrode covering the light-emitting function layer is formed.

In some embodiments of the present disclosure, forming a leakage cutting layer on the surface of the drive backplane where the first electrode layer is formed, that is, step S120, includes:

In step S1210, a first boundary layer is formed on the surface of the drive backplane where a first electrode layer is formed, the first boundary layer is provided with first holes exposing the respective first electrodes in a one-to-one correspondence, and a plurality of ring-shaped holes in a blind hole pattern surrounding the first holes in a one-to-one relationship unambiguous correspondence.

In step S1220, a second boundary layer is formed on a surface of the first boundary layer facing away from the drive backplane, the second boundary layer being provided with second holes surrounding the first holes at positions corresponding to the first holes, an orthographic projection of the second boundary layer onto the drive backplane and middle the parts are spaced at a certain distance from each other, and the second limiting layer is formed on the surface of the first limiting layer facing away from the drive backplane and is located outside the annular holes.

The details and beneficial effects of the respective layer structures in the manufacturing method according to embodiments of the present disclosure have been described in the above second display panel embodiment and will not be repeated herein.

In some embodiments of the present disclosure, the first boundary layer and the second boundary layer may be formed simultaneously during a halftone mask or other patterning processes; of course, they may also be formed separately and are not particularly limited herein.

Embodiments of the present disclosure further provide a method for manufacturing a display panel, and the display panel may be the third display panel described above. As shown in FIG. 12, the manufacturing method includes steps S210 to S250, in which:

In step S210, a first electrode layer is formed on the surface of the drive backplane, the first electrode layer includes a plurality of first electrodes distributed in an array, the first electrode includes a flat middle portion and an edge portion surrounding the middle portion, the edge portion includes a horizontal portion surrounding the middle portion, and a rising portion connected between the middle portion and the horizontal portion, and the thickness of the horizontal portion is less than the thickness of the middle portion.

In step S220, a first boundary layer is formed on the surface of the drive backplane where a first layer of electrodes is formed, the first boundary layer is provided with a plurality of holes, respective first electrodes are provided in the respective holes in a one-to-one correspondence, and between each of the edge portions and the side wall of the hole, where the edge portion is located, a spatial region is formed to expose the excitation backplane.

In step S230, a second boundary layer is formed covering the first boundary layer and the drive backplane located in the spatial region, the second boundary layer at least partially opening the corresponding middle portions and recessed toward the drive backplane in the spatial region and portions corresponding to the edge portions. .

In step S240, a light emitting function layer is formed that at least partially covers the second boundary layer and the middle portions.

In step S250, a second electrode covering the light-emitting function layer is formed.

The details and beneficial effects of the respective layer structures in the manufacturing method of the embodiment of the present disclosure have been described in the third display panel embodiments above and will not be repeated herein.

It should be noted that although the various steps of the method in the present disclosure are described in a particular order in the drawings, this does not require or imply that the steps must be performed in a particular order or that all steps shown must be performed to realize the desired result. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step for execution, and/or one step may be divided into multiple steps for execution, etc.

Embodiments of the present disclosure further provide a display device, and the display device may include any of the respective embodiments of the above-mentioned first type display panel, second type display panel, and third type display panel. Specific structures of the first type of display panel to the third type of display panel may refer to the above-described implementation methods, which are not repeated herein. The display device according to the present disclosure can be used in electronic devices such as mobile phones, tablet computers and televisions.

Other embodiments of the present disclosure can readily be conceived by those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure. These variations, uses, or adaptations follow the general principles of the present disclosure and include well-known or conventional techniques in the art that are not disclosed in the present disclosure. The description and embodiments are to be considered as illustrative only, and the true scope and spirit of the present disclosure is set forth in the appended claims.

Claims (122)

1. Display panel containing: excitation backplane; a first electrode layer located on a surface of the drive backplane and comprising a plurality of first electrodes distributed in a matrix; a light emitting function layer formed on a side of the first electrode layer facing away from the drive backplane; a second electrode covering the light emitting function layer and comprising a separating portion and a plurality of flat portions separated by the separating portion, wherein the separating portion comprises raised portions and first recessed portions, wherein the protruded portions protrude from the drive backplane and the first recessed portions are recessed toward excitation backplane; And a leakage cutting layer formed on the same side of the drive backplane as the first electrode layer and separated by the first electrodes, the light emitting function layer covering the leakage cutting layer, portions of the leakage cutting layer located among the first electrodes having protruding structures orthographic projections of the protruding structures onto the drive backplane are separated from the first electrodes, and at least one of the protruding structures is located within the orthographic projection of at least one of the protruding sections onto the drive backplane, wherein in the separating part there is only one protruding section between any two adjacent first recessed sections, The leakage cut-off layer comprises a first limiting layer and a second limiting layer sequentially stacked on top of each other in a direction facing away from the drive backplane, wherein both the first limiting layer and the second limiting layer at least partially expose the middle portions of the first electrodes, and the edge of the orthographic projection the second confining layer on the excitation backplane is located outside the middle parts; And the protruding structures comprise a second confining layer and a portion of the first confining layer corresponding to the second confining layer. 2. The display panel according to claim 1, wherein the raised portion projects toward a side of the flat portions facing away from the drive backplane, the first recessed portions being recessed toward the side of the flat portions facing the drive backplane, 3. The display panel of claim 2, wherein the first electrode comprises a middle portion and an edge portion surrounding the middle portion, the edge portion comprising a horizontal portion surrounding the middle portion and a rising portion connecting the middle portion to the horizontal portion; the light emitting layer at least partially covers the immediate middle parts; And the orthographic projections of the respective flat portions onto the field backplane are located within the orthographic projections of the respective first electrodes onto the field backplane in a one-to-one correspondence, wherein the orthographic projections of the first recessed portions onto the field backplane are located at least partially outside the orthographic projections of the middle portions of the first electrodes on excitation backplane. 4. The display panel of claim 3, wherein the orthographic projections of the lower points of the first recessed portions onto the field backplane are located outside the orthographic projections of the middle portions of the first electrodes onto the field backplane. 5. The display panel of claim 4, wherein the first recessed portion comprises a first side surface connected to the flat portion and a second side surface connected to the raised portion, the first side surface and the second side surface tapering toward the drive backplane. 6. The display panel of claim 5, wherein the inclination of the first side surface relative to the middle portion is less than or equal to the inclination of the second side surface relative to the middle portion. 7. The display panel according to claim 6, wherein the minimum thickness of the portion of the second electrode corresponding to the first side surface is greater than the thickness of the portion corresponding to the second side surface. 8. The display panel according to claim 6, wherein the inclination of the first side surface relative to the middle part is less than 60°, and the inclination of the second side surface relative to the middle part is not less than 60° and not more than 90°. 9. The display panel according to claim 5, wherein the width of the orthographic projection of the first recessed portion onto the excitation backplane does not exceed 0.2 μm. 10. The display panel of claim 4, wherein the depth of the first recessed portion is less than twice the maximum thickness of the second electrode. 11. The display panel according to claim 10, wherein the maximum thickness of the second electrode is 90 nm, and the depth of the first recessed portion is less than 120 nm. 12. The display panel according to claim 3, in which the inclination of the rising part relative to the excitation backplane is at least 30°. 13. The display panel of claim 4, wherein the minimum value of the distance between the bottom of the first recessed portion and the middle portion of an adjacent electrode of the first electrodes in a direction perpendicular to the drive backplane is not less than 70% of the total thickness of the flat portion and the function layer emitting light. 14. The display panel as set forth in claim 4, wherein the protruding portion has a second recessed portion recessed toward the drive backplane, and the depth of the second recessed portion is less than the depth of the first recessed portion. 15. The display panel of claim 1, wherein at least a portion of the orthographic projection portion of at least one of the first recessed portions onto the drive backplane is located between the protruding structure and the first electrode. 16. The display panel of claim 1, wherein, in a cross section perpendicular to the drive backplane, an orthographic projection of the bottom of the first recessed portion on the drive backplane is located between the orthographic projections of the middle portion and the second bounding layer on the drive backplane, and the second bounding layer located within the orthographic projection of the protruding section onto the leak-cutting layer. 17. Display panel containing: excitation backplane; a first electrode layer located on a surface of the drive backplane and comprising a plurality of first electrodes distributed in a matrix; a light emitting function layer formed on a side of the first electrode layer facing away from the drive backplane; a second electrode covering the light emitting function layer and comprising a separating portion and a plurality of flat portions separated by the separating portion, wherein the separating portion comprises raised portions and first recessed portions, wherein the protruded portions protrude from the drive backplane and the first recessed portions are recessed toward excitation backplane; And a leakage cutting layer formed on the same side of the drive backplane as the first electrode layer and separated by the first electrodes, wherein the light emitting function layer covers the leakage cutting layer, portions of the leakage cutting layer located among the first electrodes have protruding structures orthographic projections of the projection structures onto the drive backplane are separated from the first electrodes, and at least one of the projection structures is located within the orthographic projection of at least one of the projections onto the drive backplane, wherein in the separating part there is only one protruding section between any two adjacent first recessed sections, the leakage cutting layer comprises a first limiting layer and a second limiting layer, the first limiting layer is located on the same surface of the drive backplane as the first electrode layer and has a plurality of holes, the corresponding first electrodes are located in the corresponding holes in a one-to-one correspondence, and between the edge a spatial region exposing the excitation backplane is formed by a portion of each of the first electrodes and a side wall of the hole where the first electrode is located; the second boundary layer covers the first boundary layer and the drive backplane located in the spatial region and at least partially exposes the middle part of the first electrode, the second boundary layer is recessed towards the drive backplane in the spatial region and the region corresponding to the edge portion, the thickness of the second boundary layer the layer is less than the thickness of the first boundary layer, and the first boundary layer and areas where the second boundary layer covers the first boundary layer are protruding structures; And the light emitting layer covers the second boundary layer. 18. The display panel of claim 17, wherein the orthographic projection of the bottom of the first recessed portion onto the drive backplane is located between the orthographic projections of the middle portion and the first bounding layer onto the drive backplane, wherein the second bounding layer is located within the orthographic projection of the protruding portion onto the cutoff leakage layer. 19. The display panel according to claim 17, wherein the material of the first boundary layer is an inorganic non-metallic material, a metallic material or an organic material. 20. Display panel containing: excitation backplane; a first electrode layer located on a surface of the drive backplane and comprising a plurality of first electrodes distributed in a matrix; a light emitting function layer formed on a side of the first electrode layer facing away from the drive backplane; And a second electrode covering the light emitting function layer and comprising a separating portion and a plurality of flat portions separated by the separating portion, wherein the separating portion comprises raised portions and first recessed portions, wherein the protruded portions protrude from the drive backplane and the first recessed portions are recessed toward excitation backplane, wherein in the separating part there is only one protruding section between any two adjacent first recessed sections, wherein the display panel further comprises: a leakage cutting layer configured on the same side of the drive backplane as the first electrode layer and configured to space the first electrodes, the light emitting function layer covering the leakage cutting layer, wherein a portion of the leakage cutting layer located between the middle portions of any two adjacent electrodes of the first electrodes has two overlapping portions, two recessed structures, and a raised structure, the two overlapping portions being respectively located on the surfaces of the two middle portions facing away from the drive backplane, the two the recessed structures are located between two overlapping parts, and the protruding structure is located between the two recessed structures. 21. Display panel containing: excitation backplane; a first electrode layer located on a surface of the drive backplane and comprising a plurality of first electrodes distributed in a matrix; a leakage-stopping layer formed on the same surface of the drive backplane as the first electrode layer, and comprising a first boundary layer and a second boundary layer sequentially stacked in a direction facing away from the drive backplane, the first boundary layer being provided with first openings , which open at least a portion of the respective first electrode portions in a one-to-one correspondence, and the second boundary layer is provided with second openings surrounding the first openings at positions corresponding to the first openings; a light emitting function layer at least partially covering the leakage cutting layer and at least a portion of the first electrode portions; a second electrode covering the light-emitting function layer; And a color film layer located on the side of the second electrode facing away from the drive backplane. 22. The display panel of claim 21, wherein the first electrode includes a middle portion and an edge portion surrounding the middle portion, the edge portion includes a horizontal portion surrounding the middle portion, and a rising portion connecting the middle portion to the horizontal portion, wherein the thickness of the horizontal portion is less than than the middle part; the orthographic projection of the second boundary layer onto the excitation backplane is separated from the middle parts; And the light emitting layer at least partially covers the middle portions of the first electrodes. 23. The display panel of claim 22, wherein the edge of the first opening is located inside the edge of the middle portion exposed by the first opening. 24. The display panel of claim 23, wherein the thickness of the first boundary layer is greater than the thickness of the first electrode. 25. The display panel of claim 22, wherein the first boundary layer has a plurality of annular holes with a blind hole pattern surrounding the corresponding first holes in a one-to-one correspondence, and the second boundary layer is located on a surface of the first boundary layer facing away from the drive backplane, and is at least partially located outside the annular holes, wherein the light emitting function layer is a continuous film layer, and the width of the annular holes is less than the width of the edge portion. 26. The display panel of claim 25, wherein the orthographic projection of the second boundary layer onto the first boundary layer overlaps with a portion of the first boundary layer outside the annular openings. 27. The display panel of claim 25, wherein two annular openings are provided between any two adjacent first openings, the second boundary layer being located between said two annular openings. 28. The display panel of claim 21, wherein the respective first openings are distributed along a plurality of distribution directions, and the respective directions comprise a first distribution direction and a second distribution direction that intersect; the distance between any two adjacent first holes in the first distribution direction is the first distance; the distance between any two adjacent first holes in the second distribution direction is the second distance; And the first distance is different from the second distance. 29. The display panel of claim 23, wherein the material of the first boundary layer is different from the material of the second boundary layer. 30. The display panel of claim 26, wherein the material of the first boundary layer is an inorganic non-metallic material and the material of the second boundary layer is a metallic material. 31. The display panel of claim 23, wherein the material of the first boundary layer is the same as the material of the second boundary layer. 32. The display panel of claim 23, wherein the distance between the side wall of the second hole and the edge of the middle portion of the first electrode that the second hole surrounds is at least 1/5 of the maximum distance between the middle portions of two adjacent electrodes of the first electrodes. 33. The display panel according to claim 22, wherein the distance between the side wall of the second hole and the edge of the middle part of the first electrode, which surrounds the second hole, is not less than 0.2 μm. 34. The display panel of claim 22, wherein, in the direction perpendicular to the drive backplane, the distance between the surface of the second boundary layer facing away from the drive backplane and the surface of the middle portion facing away from the drive backplane is at least 25% of the thickness layer with the function of emitting light and no more than 80% of the thickness of the layer with the function of emitting light. 35. The display panel of claim 22, wherein the side wall of the second opening extends in a direction away from the drive backplane, wherein the angle between the side wall of the second opening and the middle portion is not less than 65° and not more than 90°. 36. The display panel of claim 22, wherein a groove is formed in a portion of the second boundary layer outside the second opening. 37. The display panel according to claim 36, wherein the width of the groove is less than the distance between the middle portions of two adjacent electrodes of the first electrodes. 38. The display panel according to claim 36, wherein the groove width is greater than 0.2 µm. 39. The display panel as set forth in claim 22, wherein a portion of the leakage-stopping layer located between middle portions of any two adjacent electrodes of the first electrodes has a recessed portion and a projected portion. 40. The display panel according to claim 39, wherein the portion of the leakage-stopping layer located between the middle portions of any two adjacent electrodes of the first electrodes has a plurality of recessed portions and protruding portions distributed alternately. 41. The display panel of claim 40, wherein a portion of the leakage-stopping layer located between the middle portions of any two adjacent electrodes of the first electrodes has two recessed portions and three protruding portions, wherein one recessed portion is located between any two adjacent protruded portions. 42. A display panel comprising: excitation backplane; a first electrode layer located on a surface of the drive backplane and comprising a plurality of first electrodes distributed in a matrix; a leakage-cutting layer comprising a first limiting layer and a second limiting layer, wherein the first limiting layer is formed on the same surface of the drive backplane as the first electrode layer and has a plurality of holes, the corresponding first electrodes are located in the corresponding holes in a one-to-one correspondence, between each of the first electrodes and the side wall of the hole where the first electrode is located forms a spatial region exposing the drive backplane, the second boundary layer covers the first boundary layer and the drive backplane located in the spatial region, and the second boundary layer has openings that are at least the first electrodes are at least partially opened; a light emitting layer at least partially covering the second boundary layer and at least a portion of the first electrode portions; a second electrode covering the light-emitting function layer; And a color film layer located on the side of the second electrode facing away from the drive backplane. 43. The display panel of claim 42, wherein the first electrode includes a flat middle portion and an edge portion surrounding the middle portion, the edge portion includes a horizontal portion surrounding the middle portion, and a rising portion connecting the middle portion to the horizontal portion, wherein the thickness of the horizontal portion is less thickness of the middle part; the holes at least partially expose the middle portions of the first electrodes, and a spatial region is formed between an edge portion of each of the first electrodes and a side wall of the hole where the first electrode is located; And the second boundary layer is recessed toward the drive backplane in a spatial region corresponding to the edge portion. 44. The display panel of claim 43, wherein at least a portion of the second boundary layer located in the spatial region is recessed toward a side of the first boundary layer facing the drive backplane. 45. The display panel of claim 44, wherein the drive backplane is provided with an annular groove surrounding the first electrode in a spatial region, and a portion of the second boundary layer located in the spatial region is recessed into the annular groove. 47. The display panel of claim 43, wherein the edge of the opening is located inside the edge of the middle portion that opens through the opening. 47. The display panel according to claim 43, wherein the respective openings are distributed along a plurality of distribution directions, and the respective directions comprise a first distribution direction and a second distribution direction that intersect; the distance between any two adjacent through holes in the first distribution direction is the first distance; the distance between any two adjacent through holes in the second distribution direction is the second distance; And the first distance is different from the second distance. 48. The display panel of claim 42, wherein the material of the first boundary layer is different from the material of the second boundary layer. 49. The display panel of claim 48, wherein the material of the first boundary layer is metal and the material of the second boundary layer is non-metallic. 50. The display panel of claim 42, wherein the material of the first boundary layer is the same as the material of the second boundary layer. 51. The display panel according to claim 42, wherein the drive backplane contains: substrate; driving transistors located on one side of the substrate; And an equalization layer provided on a side of the driving transistors facing away from the substrate, wherein a first electrode layer and a leakage cutting layer are provided on a surface of the equalization layer facing away from the substrate, wherein the materials of the equalization layer, the first confinement layer and the second confinement layer are the same. 52. The display panel of claim 45, wherein the orthographic projections of the annular groove and the spatial region onto the drive backplane overlap. 53. The display panel according to claim 45, wherein the inclination of the section of the second electrode corresponding to the side wall of the hole relative to the middle part is not less than 65° and not more than 90°, and the inclination of the section of the second electrode corresponding to the edge part relative to the middle part is less than 60 °. 54. The display panel of claim 42, wherein the thickness of the second boundary layer is less than the thickness of the first boundary layer. 55. The display panel of claim 54, wherein the thickness of the second boundary layer is less than 1/5 of the thickness of the first boundary layer. 56. A method for manufacturing a display panel, comprising the steps of: forming a first electrode layer on a surface of the drive backplane, the first electrode layer comprising a plurality of first electrodes distributed in a matrix; forming a leakage cutting layer on the same surface of the drive backplane as the first electrode layer, the leakage cutting layer comprising a first boundary layer and a second boundary layer sequentially stacked in a direction facing away from the drive backplane, the first boundary layer being provided with the first holes that expose at least a portion of the respective first electrode portions in a one-to-one correspondence, and the second boundary layer is provided with second holes surrounding the first holes at positions corresponding to the first holes; forming a light emitting function layer, wherein the light emitting function layer at least partially covers the leakage cutting layer and said at least a portion of the first electrode portions; forming a second electrode, the second electrode covering the light emitting function layer; And forming a color film layer on a side of the second electrode facing away from the drive backplane. 57. The display panel manufacturing method of claim 56, wherein the first boundary layer and the second boundary layer are formed by the same patterning process. 58. A method for manufacturing a display panel, comprising the steps of: forming a first electrode layer on a surface of the drive backplane, the first electrode layer comprising a plurality of first electrodes distributed in a matrix; forming a first confining layer on the same surface of the drive backplane as the first electrode layer, the first confining layer having a plurality of openings, respective first electrodes being disposed in the respective openings in a one-to-one correspondence, and between each of the first electrodes and a side wall of the opening, wherein the first electrode is located, a spatial region is formed, opening the excitation backplane; forming a second confining layer, the second confining layer covering the first confining layer and a drive backplane located in the spatial region, and the second confining layer having openings that at least partially expose the first electrodes; forming a light emitting function layer, wherein the light emitting function layer at least partially covers the second boundary layer and at least a portion of the first electrode portions; forming a second electrode, the second electrode covering the light emitting function layer; And forming a color film layer on a side of the second electrode facing away from the drive backplane. 59. A display device comprising a display panel according to any one of claims. 1-55.