CN115458573A

CN115458573A - Display panel and display device

Info

Publication number: CN115458573A
Application number: CN202211271823.9A
Authority: CN
Inventors: 王丹
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2022-12-09

Abstract

The application provides a display panel and a display device, relates to the technical field of display, and the display panel can effectively reduce power consumption on the basis of not increasing extra processes and not changing the existing structure, and is simple and easy to realize. The display panel includes: a display area, the display area comprising: a substrate; the light-emitting units are arranged on the substrate in an array mode and comprise first electrodes and second electrodes, and the second electrodes are located on one sides, far away from the substrate, of the first electrodes; and the signal transmission structure is at least arranged on the same layer as the first electrode and is insulated from the first electrode, and the signal transmission structure comprises at least one signal transmission part which is arranged around at least part of the light-emitting unit and is electrically connected with the second electrode.

Description

Display panel and display device

Technical Field

The application relates to the technical field of display, in particular to a display panel and a display device.

Background

With the development of technology, OLED (Organic Light Emitting Diode) display devices are widely used, wherein power consumption is one of the important evaluation indexes of OLED display devices. Under the condition that the maximum brightness of the OLED display device is not changed, how to reduce the power consumption of the OLED display device is important.

Therefore, it is desirable to provide a novel OLED display device to reduce power consumption.

Disclosure of Invention

The embodiment of the application provides a display panel and a display device, and the display panel can effectively reduce power consumption on the basis of not increasing additional processes and not changing the existing structure, and is simple and easy to implement.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in one aspect, there is provided a display panel including a display area, the display area including:

a substrate;

the light-emitting unit comprises a first electrode and a second electrode, and the second electrode is positioned on one side of the first electrode, which is far away from the substrate;

and the signal transmission structure is at least arranged on the same layer as the first electrode and is insulated from the first electrode, and the signal transmission structure comprises at least one signal transmission part which is arranged around at least part of the light-emitting unit and is electrically connected with the second electrode.

Optionally, the signal transmission structure includes a plurality of signal transmission portions, each signal transmission portion is disposed around at least a portion of one of the light emitting units, and all the signal transmission portions are electrically connected and electrically connected to the second electrode.

Optionally, each of the signal transmission parts is disposed around one of the light emitting units.

Optionally, any two adjacent signal transmission portions are directly connected to form a signal transmission unit, and the signal transmission unit is arranged around at least part of the two light emitting units and is disconnected between the two light emitting units.

Optionally, all the light emitting units include at least two different colors of the light emitting units, and the signal transmission part is disposed around at least a portion of at least one color of the light emitting units.

Optionally, all of the signal transmission portions form a grid structure.

Optionally, all the light emitting units include a plurality of first color light emitting units, a plurality of second color light emitting units, and a plurality of third color light emitting units, and the signal transmission part at least partially surrounds one of the first color light emitting units, one of the second color light emitting units, or one of the third color light emitting units.

Optionally, all of the first color light emitting cells and all of the second color light emitting cells are alternately arranged along a first direction and a second direction to form a plurality of first pixel rows and a plurality of first pixel columns, all of the third color light emitting cells are arrayed along the first direction and the second direction to form a plurality of second pixel rows and a plurality of second pixel columns, the plurality of first pixel rows and the plurality of second pixel rows are alternately arranged along the second direction and are staggered in the first direction, and the plurality of first pixel columns and the plurality of second pixel columns are alternately arranged along the first direction and are staggered in the second direction; wherein the first direction is perpendicular to the second direction;

the signal transmission part is located between the adjacent first color light emitting units and the adjacent second color light emitting units, and/or the signal transmission part is located between the adjacent first color light emitting units and the adjacent third color light emitting units, and/or the signal transmission part is located between the adjacent second color light emitting units and the adjacent third color light emitting units.

Optionally, all the light emitting units are divided into a plurality of light emitting unit groups, and each light emitting unit group includes one first color light emitting unit, two second color light emitting units, and one third color light emitting unit; in each of the light emitting unit groups, the first color light emitting unit and the third color light emitting unit are arranged along a first direction, and two second color light emitting units are adjacently arranged in a second direction and are located between the first color light emitting unit and the third color light emitting unit; wherein the first direction is perpendicular to the second direction;

Optionally, all the light emitting units are divided into a plurality of light emitting unit groups, and each light emitting unit group includes one light emitting unit of the first color, one light emitting unit of the second color, and one light emitting unit of the third color; in each of the light emitting unit groups, the first color light emitting unit or the second color light emitting unit and the third color light emitting unit are arranged in a first direction, and the first color light emitting unit or the second color light emitting unit is arranged in a second direction; wherein the first direction is perpendicular to the second direction;

Optionally, the first color light emitting unit, the second color light emitting unit, and the third color light emitting unit are sequentially arranged along a first direction to form a pixel group, and a plurality of the pixel groups are arranged along the first direction to form a pixel row; a plurality of the pixel rows are arranged along a second direction to form an array; wherein the first direction is perpendicular to the second direction;

the signal transmission part is disposed at least between the first color light emitting unit and the second color light emitting unit.

Optionally, adjacent signal transmission parts are directly connected;

or, the display panel further comprises at least one first connection part, and the adjacent signal transmission parts are connected through the first connection part.

Optionally, adjacent signal transmission units are directly connected;

or, the display panel further comprises at least one second connecting part, and the adjacent signal transmission units are connected through the second connecting part.

Optionally, the signal transmission structure is a power signal line.

Optionally, a pixel defining layer is disposed between adjacent light emitting units, and a portion of the pixel defining layer is located on a side of the first electrode away from the substrate;

the orthographic projection of each signal transmission part on the substrate is positioned within the orthographic projection of the pixel defining layer on the substrate;

the pixel defining layer has a via hole at an edge of the display area, and the signal transmission structure is electrically connected to the second electrode through the via hole.

Optionally, the display panel further includes a plurality of driving units arranged in an array, the driving units are disposed on one side of the substrate close to the first electrode, and each driving unit includes a source drain layer;

the signal transmission structure is arranged on the same layer as the source drain layer and is insulated from the source drain layer, the orthographic projection of the signal transmission structure on the substrate is positioned within the orthographic projection of the pixel limiting layer on the substrate, and the signal transmission structure at least partially surrounds the source drain layer of each of the at least two driving units and extends along the first direction or the second direction; wherein the first direction is perpendicular to the second direction.

Optionally, the light-emitting unit further includes a plurality of light-emitting functional layers, the plurality of light-emitting functional layers are located between the first electrode and the second electrode, and the plurality of light-emitting functional layers include a first light-emitting functional layer, an electric charge generation layer, and a second light-emitting functional layer, which are sequentially stacked on the first electrode;

the signal transmission structure is also positioned on one side of the pixel limiting layer far away from the substrate, the orthographic projection of the pixel limiting layer on the substrate is positioned within the orthographic projection of the pixel limiting layer on the substrate, and at least one of the plurality of light-emitting functional layers is disconnected at the position of the signal transmission structure;

the charge generation layer is disconnected at a position where the signal transmission structure is located.

In another aspect, a display device is provided, which includes the display panel.

In another aspect, a method for manufacturing the display panel is provided, where the method includes:

providing a substrate;

forming a signal transmission structure and a plurality of light emitting units arranged in an array on the substrate; the light-emitting unit is arranged on the substrate and comprises a first electrode and a second electrode, and the second electrode is positioned on one side, far away from the substrate, of the first electrode; the signal transmission structure is at least arranged on the same layer as the first electrode and insulated from the first electrode, and comprises at least one signal transmission part which is arranged around at least part of the light-emitting unit and electrically connected with the second electrode.

An embodiment of the present application provides a display panel including a display area, the display area including: a substrate; the light-emitting unit comprises a first electrode and a second electrode, and the second electrode is positioned on one side of the first electrode, which is far away from the substrate; and the signal transmission structure is at least arranged on the same layer as the first electrode and is insulated from the first electrode, and comprises at least one signal transmission part which is arranged around at least part of the light-emitting unit and is electrically connected with the second electrode.

On one hand, the signal transmission part is arranged around at least part of the light-emitting unit, so that the current in the display panel can be dispersed to the signal transmission part arranged in the display area, and the current in the display panel can be dispersed to the periphery of the light-emitting unit, so that the voltage Drop (IR-Drop) of the VSS line can be effectively reduced on the premise of not increasing additional processes and not changing the overlapping of the existing VSS line in the frame area, and the power consumption of the display panel is further reduced; on the other hand, the current in the display panel does not flow into the driving chip (IC) from the edge of the display panel, but is dispersed to each signal transmission part in the display area, and the problem of local heating at the edge of the display panel is remarkably improved; on the other hand, the current paths in the display panel are changed from two-dimensional distribution to three-dimensional distribution, the current in the display panel can not only flow into the IC after being converged from the cathode layer to the periphery, but also can be converged to the IC through the signal transmission part below the cathode layer, namely, the current in the display area has upper and lower current paths, which is more beneficial to dispersing the current; on the other hand, the signal transmission structure is at least arranged on the same layer as the first electrode in the display area and is insulated from the first electrode, so that the signal transmission structure and the first electrode can be wired along the light-emitting unit, the conventional four-metal process (namely, a single SD process) can be compatible, an additional metal layer is not required, and the method is simple and easy to implement.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

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

fig. 2 is a schematic structural diagram of a second display panel according to an embodiment of the present disclosure;

fig. 3 is a top view of a first display panel according to an embodiment of the present disclosure;

fig. 4 is a top view of a second display panel provided in the embodiments of the present application;

fig. 5 is a top view of a third display panel provided in the embodiments of the present application;

fig. 6 is a top view of a fourth display panel provided in the embodiment of the present application;

fig. 7 is a top view of a fifth display panel according to an embodiment of the present application;

fig. 8 is a top view of a sixth display panel according to an embodiment of the present application;

fig. 9 is a top view of a seventh display panel according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a third display panel according to an embodiment of the present application;

fig. 11 is a schematic view of an edge of a display area of a display panel according to an embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of a fourth display panel according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a fifth display panel according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the embodiments of the present application, the terms "first", "second", "third", and the like are used for distinguishing the same or similar items having substantially the same functions and actions, and are used only for clearly describing technical solutions of the embodiments of the present application, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

In the embodiments of the present application, "a plurality" means two or more, and "at least one" means one or more unless specifically limited otherwise.

In the embodiments of the present application, the terms "on" and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In embodiments of the present application, the term "electrically connected" may mean that two components are directly electrically connected, or that two components are electrically connected via one or more other components; "electrically connected" may mean electrically connected by a wire, or may mean electrically connected by a radio signal.

An embodiment of the present application provides a display panel, as shown in fig. 1 and 2, including: including a display area AA, the display area AA including:

a substrate 1.

The light emitting device comprises a plurality of light emitting units 2 arranged in an array, wherein the light emitting units 2 are arranged on a substrate 1, the light emitting units 2 comprise a first electrode 21 and a second electrode 22, and the second electrode 22 is positioned on one side of the first electrode 21 away from the substrate 1.

And a signal transmission structure 3 at least disposed on the same layer as the first electrode 21 and insulated therefrom, wherein the signal transmission structure 3 includes at least one signal transmission portion 31, and the signal transmission portion 31 is disposed around at least a portion of the light emitting unit 2 and electrically connected to the second electrode 22.

Here, the type of the display panel is not particularly limited, and the display panel may be an OLED (Organic Light Emitting Diode) display panel, for example, but may also be another type of display panel.

The display Area (AA) of the display panel is an Area for realizing display. In the display region, a light-emitting region (also referred to as a pixel opening region) refers to a region where a light-emitting unit is provided, and a non-light-emitting region refers to a region where a pixel defining layer or the like is provided.

The material of the substrate is not limited, and may include rigid materials, such as: glass; alternatively, it may also comprise flexible materials, such as: one or more materials selected from Polyimide (PI), polycarbonate, polyacrylate, polyetherimide and polyethersulfone, including but not limited to.

The structure of the light emitting unit is not particularly limited, and for example, the light emitting unit may include an anode, a light emitting functional layer, and a cathode, which are sequentially stacked, where the light emitting functional layer may include a light emitting layer or a plurality of light emitting layers. Fig. 1 illustrates an example in which the light-emitting function layer includes a first light-emitting layer 23. Fig. 2 is illustrated by taking an example in which the light emitting function layer includes two light emitting layers, namely a first light emitting layer 23 and a second light emitting layer 24 (specifically, a first red light emitting layer 23R and a second red light emitting layer 24R, a first green light emitting layer 23G and a second green light emitting layer 24G, and a first blue light emitting layer 23B and a second blue light emitting layer 24B shown in fig. 2), and fig. 2 realizes a double-layer light emitting (Tandem EL) design. The light-emitting function layer includes not only a layer that directly emits light but also a functional layer for assisting light emission, for example, a hole injection layer (specifically, the hole injection layer 26R, the hole injection layer 26G, and the hole injection layer 26B shown in fig. 2), a hole transport layer 27 (specifically, the hole transport layer 27R, the hole transport layer 27G, and the hole transport layer 27B shown in fig. 2), a first electron transport layer 28 (specifically, the first electron transport layer 28R, the first electron transport layer 28G, and the first electron transport layer 28B shown in fig. 2), a charge generation layer 25 (specifically, the charge generation layer 25R, the charge generation layer 25G, and the charge generation layer 25B shown in fig. 2), and a second electron transport layer 29 (specifically, the second electron transport layer 29R, the second electron transport layer 29G, and the second electron transport layer 29B shown in fig. 2) shown in fig. 1 and 2. In addition, R represents red, G represents green, and B represents blue.

Here, the type of the first electrode and the second electrode is not particularly limited, and for example, the first electrode may be an anode, the second electrode may be a cathode, and the second electrode may be shared by a plurality of light emitting units. In the case where the first electrode is an anode and the second electrode is a cathode, the material of the first electrode and the second electrode is not particularly limited, and for example, the anode may be formed of a transparent conductive material having a high work function, for example: the anode may employ a metal material such as any one or more of magnesium (Mg), silver (Ag), copper (Cu), aluminum (Al), titanium (Ti), and molybdenum (Mo); alternatively, the alloy material of the above metals, such as aluminum neodymium alloy (AlNd) or molybdenum niobium alloy (MoNb), may be a single layer structure, or a multi-layer composite structure, such as Ti/Al/Ti, etc.; alternatively, the structure may be a stack structure formed by metal and transparent conductive material, such as reflective material like ITO/Ag/ITO, mo/AlNd/ITO, etc. The cathode may be formed of a material of high conductivity and low work function, a metal material, or the like, for example: any one or more of magnesium (Mg), silver (Ag), aluminum (Al); or an alloy made from any one or more of the above metals; alternatively, a multilayer composite structure of a transparent conductive material, such as ITO (Indium Tin oxide), a metal, and a transparent conductive material is used.

The type, material, and the like of the signal transmission structure are not particularly limited, and the signal transmission structure may be a power signal line. For example, the material of the signal transmission structure may include metal, such as: titanium, aluminum, etc., although the present embodiment includes but is not limited thereto.

The same layer setting refers to manufacturing by adopting a one-time composition process. The one-step patterning process refers to a process of forming a desired layer structure through one exposure. The primary patterning process includes masking, exposing, developing, etching, and stripping processes. The signal transmission structure and the first electrode are arranged at the same layer at least, namely: the signal transmission structure and the first electrode are arranged on the same layer; alternatively, the signal transmission structure is not only disposed in the same layer as the first electrode, but also disposed in the same layer as other structures, and is not limited herein.

The manner of insulating the signal transmission structure from the first electrode is not particularly limited, and for example, the signal transmission structure is disconnected from the first electrode; alternatively, the signal transmission structure and the first electrode may be provided with other structures and insulated from each other by the structures.

The signal transmission structure comprises at least one signal transmission part, and the signal transmission part comprises: the signal transmission structure comprises a signal transmission part; alternatively, the signal transmission structure includes a plurality of signal transmission sections. The number of the signal transmission parts may be determined according to the number of the light emitting units, and for example, the number of the signal transmission parts may be the same as the number of the light emitting units, where each light emitting unit is correspondingly provided with one signal transmission part; or, the number of the signal transmission parts is less than that of the light emitting units, and at this time, some of the light emitting units are correspondingly provided with the signal transmission parts, for example: each light-emitting unit in the odd-numbered row is correspondingly provided with a signal transmission part, and the light-emitting units in the even-numbered row are not provided with the signal transmission parts, which is subject to practical application.

The signal transmission part is arranged around at least part of the light-emitting unit, and the signal transmission part comprises: the signal transmission part is arranged around the part of the light-emitting unit; alternatively, the signal transmission part may be disposed around the light emitting unit, and is not particularly limited herein.

Here, the manner, position, etc. of the electrical connection between the signal transmission part and the second electrode are not particularly limited, and for example, the signal transmission part may be directly electrically connected to the second electrode; alternatively, the signal transmission unit may be electrically connected to the second electrode through another structure. For example, each of the signal transmission parts may be electrically connected to the second electrode, and each of the signal transmission parts may be electrically connected to the second electrode through a via hole in each of the Pixel Definition Layers (PDL); or, each of the signal transmission parts may be electrically connected to the second electrode after being connected to each other, and at this time, each of the signal transmission parts may be electrically connected to the second electrode through a via hole on the pixel defining layer at the edge of the display region.

In the display panel provided in the embodiment of the application, on one hand, because the signal transmission part is arranged around at least part of the light emitting unit, the current in the display panel can be dispersed to the signal transmission part arranged in the display area, so that the current in the display panel is dispersed to the periphery of the light emitting unit, and therefore, the voltage Drop (IR-Drop) of the VSS line can be effectively reduced without adding an additional process and changing the overlapping of the existing VSS line in the frame area, and further the power consumption of the display panel is reduced; on the other hand, the current in the display panel does not flow into the driving chip (IC) from the edge of the display panel, but is dispersed to each signal transmission part in the display area, and the problem of local heating at the edge of the display panel is improved remarkably; on the other hand, the current paths in the display panel are changed from two-dimensional distribution to three-dimensional distribution, and the current in the display panel can flow into the IC after being converged from the cathode layer to the periphery and can also be converged to the IC through the signal transmission part below the cathode layer, namely the current in the display area has upper and lower layers of current paths, which is more beneficial to current dispersion; on the other hand, the signal transmission structure is at least arranged on the same layer as the first electrode in the display area and is insulated from the first electrode, so that the signal transmission structure and the first electrode can be wired along the light-emitting unit, the conventional four-metal process (namely, a single SD process) can be compatible, an additional metal layer is not required, and the method is simple and easy to implement.

Alternatively, referring to fig. 1, 3, 4, 6-9, the signal transmission structure 3 includes a plurality of signal transmission portions 31, each signal transmission portion 31 is disposed around at least a portion of one light emitting unit 2, and all the signal transmission portions 31 are electrically connected and are electrically connected to the second electrode 22.

The arrangement of the signal transmission parts around at least part of one light emitting unit means that: each signal transmission part surrounds part of one light-emitting unit; alternatively, each signal transmission portion surrounds the periphery of one light emitting unit.

The manner of electrically connecting all the signal transmission parts is not particularly limited, and for example, all the signal transmission parts may be directly electrically connected; alternatively, all the signal transmission parts may be electrically connected by other structures.

Fig. 3 and 4 are both illustrated by taking the light emitting unit 2 including a red light emitting unit 4, a green light emitting unit 5, and a blue light emitting unit 6 as an example.

In the display panel provided by the embodiment of the application, each signal transmission part is arranged around at least part of one light-emitting unit, and all the signal transmission parts are electrically connected and are electrically connected with the second electrode, so that on one hand, as the signal transmission parts are arranged around at least part of the light-emitting units, the current in the display panel can be dispersed to the signal transmission parts arranged in the display area, and the current in the display panel can be dispersed to the periphery of the light-emitting units, therefore, the voltage Drop (IR-Drop) of the VSS lines can be effectively reduced on the premise of not increasing additional processes and not changing the lap joint of the existing VSS lines in the frame area, and further, the power consumption of the display panel is reduced; on the other hand, the current in the display panel does not flow into the driving chip (IC) from the edge of the display panel, but is dispersed to each signal transmission part in the display area, and the problem of local heating at the edge of the display panel is improved remarkably; on the other hand, the current paths in the display panel are changed from two-dimensional distribution to three-dimensional distribution, and the current in the display panel can flow into the IC after being converged from the cathode layer to the periphery and can also be converged to the IC through the signal transmission part below the cathode layer, namely the current in the display area has upper and lower layers of current paths, which is more beneficial to current dispersion; on the other hand, the signal transmission structure is at least arranged on the same layer as the first electrode in the display area and is insulated from the first electrode, so that the signal transmission structure and the first electrode can be wired along the light-emitting unit, the conventional four-metal process (namely, a single SD process) can be compatible, an additional metal layer is not required, and the method is simple and easy to implement.

Alternatively, as shown in fig. 4, 6 to 9, each signal transmission portion 31 is provided around the periphery of one light emitting unit 2. Therefore, the current in the display area can be fully dispersed to the periphery of the light-emitting unit provided with the signal transmission part, and the voltage Drop (IR-Drop) of the VSS line can be reduced on the premise of not increasing additional processes and not changing the lap joint of the existing VSS line in the frame area, so that the power consumption of the display panel is effectively reduced.

The number of the signal transmission parts is not particularly limited, and the number of the signal transmission parts may be determined according to the number of the light emitting units. As an example, the signal transmission portions may be disposed around the periphery of each light emitting unit in the display panel; alternatively, each signal transmission portion may be disposed around part of the light emitting units in the display panel, and the number of the light emitting units may be one or multiple at this time, specifically based on the practical application.

Alternatively, as shown in fig. 4 and 6 to 9, in all the light emitting units 2, the signal transmission portions 31 are provided around the light emitting units 2. Therefore, the current in the display area can be dispersed around each light-emitting unit most fully, and the voltage Drop (IR-Drop) of the VSS line can be reduced on the premise of not increasing additional processes and not changing the lap joint of the existing VSS line in the frame area, so that the power consumption of the display panel is effectively reduced.

Alternatively, as shown in fig. 5, any two adjacent signal transmission portions 31 are directly connected to form a signal transmission unit 32, and the signal transmission unit 32 is disposed around at least a portion of the two light emitting units 2 and is disconnected between the two light emitting units 2. Therefore, the current in the display area can be dispersed to the signal transmission unit, and the voltage Drop (IR-Drop) of the VSS line can be reduced on the premise of not increasing additional processes and not changing the overlapping of the existing VSS line in the frame area, so that the power consumption of the display panel is effectively reduced.

The number of the signal transmission units is not particularly limited, and the number of the signal transmission units may be determined according to the number of the light emitting units.

The signal transmission unit is disposed around at least a portion of the two light emitting units, which means: the signal transmission unit is arranged around parts of the two light emitting units; alternatively, the signal transmission unit is disposed around the two light emitting units.

The signal transmission unit is disconnected between the two light emitting units, that is: the signal transmission unit is not arranged between the two light emitting units, and particularly, the signal transmission part is not arranged between the two light emitting units.

Alternatively, referring to fig. 3 to 9, all the light emitting units 2 include at least two different colors of light emitting units 2, and the signal transmission part is disposed around 31 at least a part of the at least one color of light emitting unit 2. Therefore, the current in the display area can be dispersed to the periphery of the light-emitting unit with at least one color, and the voltage Drop (IR-Drop) of the VSS line can be reduced on the premise of not increasing additional processes and not changing the overlapping of the existing VSS line in the frame area, so that the power consumption of the display panel is effectively reduced.

The color of the light emitting unit is not limited, and for example, the light emitting unit may be any one of a red light emitting unit, a green light emitting unit, a blue light emitting unit, a yellow light emitting unit, and the like, and all the light emitting units may include any two of the above-mentioned light emitting units.

The signal transmission part is arranged around at least part of the light emitting unit with at least one color, and the signal transmission part comprises: the signal transmission portion is provided around at least a part of the light emitting unit of one color, for example: the signal transmission part is arranged around at least part of the red light emitting unit, the number of the light emitting units of one color surrounded by the signal transmission part is not particularly limited, and the number of the light emitting units of one color surrounded by the signal transmission part can be one, and certainly can also be a plurality of light emitting units; alternatively, the signal transmission part may be provided around at least a portion of the light emitting units of a plurality of colors.

Fig. 5 illustrates an example where the light emitting unit 2 includes a red light emitting unit 4, a green light emitting unit 5, and a blue light emitting unit 6.

Alternatively, as shown with reference to fig. 3, 4 and 9, all the signal transmission sections 31 form a grid-like structure. At the moment, the signal transmission part adopts the routing of the same film layer as the first electrode, and is annularly wired along the light-emitting unit, and a whole network structure is formed in the display area, so that the current in the display panel can be dispersed more favorably.

Alternatively, as shown in fig. 3 to 9, all the light emitting units 2 include a plurality of first color light emitting units, a plurality of second color light emitting units, and a plurality of third color light emitting units, and the signal transmission part at least partially surrounds one of the first color light emitting units, one of the second color light emitting units, or one of the third color light emitting units. Therefore, the current in the display area can be dispersed to the periphery of the first color light-emitting unit, the second color light-emitting unit or the third color light-emitting unit through a simpler signal transmission part structure, and the voltage Drop (IR-Drop) of the VSS line can be reduced on the premise of not increasing additional processes and not changing the lap joint of the existing VSS line in the frame area, so that the power consumption of the display panel is effectively reduced.

The first color light emitting unit is not particularly limited herein, and may be, for example, any one of a red light emitting unit, a green light emitting unit, a blue light emitting unit, a yellow light emitting unit, and the like. The second color light emitting unit and the third color light emitting unit may refer to the first color light emitting unit, and are not described herein again. Fig. 3-9 are all shown by taking the first color light-emitting unit as the red light-emitting unit 4, the second color light-emitting unit as the green light-emitting unit 5, and the third color light-emitting units as the blue light-emitting units 6 as examples.

In some examples, the light emitting efficiency of the third color light emitting unit may be less than the light emitting efficiency of the second color light emitting unit. For example, the first color light emitting unit is configured to emit red light, the second color light emitting unit is configured to emit green light, and the third color light emitting unit is configured to emit blue light. Of course, the disclosed embodiments include but are not limited thereto.

In some examples, as shown in fig. 3-9, the area of the orthographic projection of the effective light emitting area of the blue light emitting unit 6 on the substrate is larger than the area of the orthographic projection of the effective light emitting area of the green light emitting unit 5 on the substrate; the area of the orthographic projection of the effective light emitting area of the green light emitting unit 5 on the substrate is larger than the area of the orthographic projection of the effective light emitting area of the red light emitting unit 4 on the substrate. Of course, the embodiments of the present disclosure include, but are not limited to, the area of the effective light emitting area of each light emitting unit may be set according to actual needs.

Alternatively, referring to fig. 6, all the first color light emitting cells and all the second color light emitting cells are alternately arranged in the first direction (OA direction shown in fig. 6) and the second direction (OB direction shown in fig. 6) to form a plurality of first pixel rows 11 and a plurality of first pixel columns 12, all the third color light emitting cells are arrayed in the first direction and the second direction to form a plurality of second pixel rows 13 and a plurality of second pixel columns 14, the plurality of first pixel rows 11 and the plurality of second pixel rows 13 are alternately arranged in the second direction and staggered in the first direction, and the plurality of first pixel columns 12 and the plurality of second pixel columns 14 are alternately arranged in the first direction and staggered in the second direction; wherein the first direction is perpendicular to the second direction.

The signal transmission part is positioned between the adjacent first color light emitting units and the second color light emitting units, and/or the signal transmission part is positioned between the adjacent first color light emitting units and the third color light emitting units, and/or the signal transmission part is positioned between the adjacent second color light emitting units and the third color light emitting units. Therefore, the current in the display area can be dispersed to the periphery of any two light-emitting units with different colors through a simpler signal transmission part structure, and the voltage Drop (IR-Drop) of the VSS line can be reduced on the premise of not increasing additional processes and not changing the lap joint of the existing VSS line in the frame area, so that the power consumption of the display panel is effectively reduced.

Here, the position of the signal transmission portion located at the adjacent different-color light-emitting unit is not particularly limited, and for example, as shown in fig. 6, the signal transmission portion 31 is disposed around the periphery of each different-color light-emitting unit 2; or, the signal transmission part is disposed around a portion of each light emitting unit with different colors, in this case, the signal transmission part may include a plurality of discrete signal transmission sub-parts, and of course, the signal transmission part may also be of an integral structure, specifically, based on practical applications.

Fig. 6 illustrates an example in which the signal transmission portion 31 is located between the adjacent first color light emitting cells and the adjacent second color light emitting cells, the signal transmission portion 31 is located between the adjacent first color light emitting cells and the adjacent third color light emitting cells, and the signal transmission portion 31 is located between the adjacent second color light emitting cells and the adjacent third color light emitting cells.

Alternatively, referring to fig. 7, all the light emitting cells 2 are divided into a plurality of light emitting cell groups 15, and each light emitting cell group 15 includes one first color light emitting cell, two second color light emitting cells, and one third color light emitting cell; in each light-emitting unit group 15, the first color light-emitting unit and the third color light-emitting unit are arranged in the first direction (OA direction shown in fig. 7), and the two second color light-emitting units are disposed adjacent to each other in the second direction (OB direction shown in fig. 7) and between the first color light-emitting unit and the third color light-emitting unit; wherein the first direction is perpendicular to the second direction.

The signal transmission part is positioned between the adjacent first color light emitting units and the second color light emitting units, and/or the signal transmission part is positioned between the adjacent first color light emitting units and the third color light emitting units, and/or the signal transmission part is positioned between the adjacent second color light emitting units and the third color light emitting units. Therefore, the current in the display area can be dispersed to the periphery of any two light-emitting units with different colors through a simpler signal transmission part structure, and the voltage Drop (IR-Drop) of the VSS line can be reduced on the premise of not increasing additional processes and not changing the lap joint of the existing VSS line in a frame area, so that the power consumption of the display panel is effectively reduced.

Here, the position of the signal transmission portion located in the adjacent different-color light-emitting units is not particularly limited, and for example, as shown in fig. 7, the signal transmission portion 31 is disposed around the periphery of each different-color light-emitting unit 2; or, the signal transmission part is disposed around a portion of each light emitting unit with different colors, in this case, the signal transmission part may include a plurality of discrete signal transmission sub-parts, and of course, the signal transmission part may also be of an integral structure, specifically subject to practical application.

Fig. 7 illustrates an example in which the signal transmission portion 31 is located between the adjacent first color light emitting cells and the adjacent second color light emitting cells, the signal transmission portion 31 is located between the adjacent first color light emitting cells and the adjacent third color light emitting cells, and the signal transmission portion 31 is located between the adjacent second color light emitting cells and the adjacent third color light emitting cells.

Alternatively, referring to fig. 8, all the light emitting cells 2 are divided into a plurality of light emitting cell groups 15, and each light emitting cell group 15 includes one first color light emitting cell, one second color light emitting cell, and one third color light emitting cell; in each light-emitting unit group 15, the first color light-emitting unit or the second color light-emitting unit and the third color light-emitting unit are arranged in the first direction (OA direction shown in fig. 8), and the first color light-emitting unit or the second color light-emitting unit is arranged in the second direction (OB direction shown in fig. 8); wherein the first direction is perpendicular to the second direction.

Here, the position of the signal transmission portion located in the adjacent different-color light-emitting units is not particularly limited, and for example, as shown in fig. 8, the signal transmission portion 31 is disposed around the periphery of each different-color light-emitting unit 2; or, the signal transmission part is disposed around a portion of each light emitting unit with different colors, in this case, the signal transmission part may include a plurality of discrete signal transmission sub-parts, and of course, the signal transmission part may also be of an integral structure, specifically subject to practical application.

Fig. 8 illustrates an example in which the signal transmission portion 31 is located between the adjacent first color light emitting cells and the adjacent second color light emitting cells, the signal transmission portion 31 is located between the adjacent first color light emitting cells and the adjacent third color light emitting cells, and the signal transmission portion 31 is located between the adjacent second color light emitting cells and the adjacent third color light emitting cells.

Optionally, the first color light emitting unit, the second color light emitting unit, and the third color light emitting unit are sequentially arranged along a first direction (OA direction) to form a pixel group, and the plurality of pixel groups are arranged along the first direction to form a pixel row; a plurality of pixel rows arranged in a second direction (OB direction) to form an array; wherein the first direction is perpendicular to the second direction.

The signal transmission part is disposed at least between the first color light emitting unit and the second color light emitting unit. Therefore, the current in the display area can be dispersed to the periphery of any two light-emitting units with different colors through a simpler signal transmission part structure, and the voltage Drop (IR-Drop) of the VSS line can be reduced on the premise of not increasing additional processes and not changing the lap joint of the existing VSS line in the frame area, so that the power consumption of the display panel is effectively reduced.

The signal transmission part is at least arranged between the first color light-emitting unit and the second color light-emitting unit, and the signal transmission part comprises: the signal transmission part is arranged between the first color light-emitting unit and the second color light-emitting unit; or, the signal transmission part is arranged between the first color light emitting unit and the second color light emitting unit, and the signal transmission part is arranged between the first color light emitting unit and the third color light emitting unit; alternatively, the signal transmission section is provided between the first color light emitting unit and the second color light emitting unit, and the signal transmission section is provided between the second color light emitting unit and the third color light emitting unit.

The position of the signal transmission part at least arranged between the first color light-emitting unit and the second color light-emitting unit is not particularly limited, and the signal transmission part is arranged around the periphery of each different color light-emitting unit; or, the signal transmission part is disposed around a portion of each light emitting unit with different colors, in this case, the signal transmission part may include a plurality of discrete signal transmission sub-parts, and of course, the signal transmission part may also be of an integral structure, specifically subject to practical application.

Alternatively, as shown in fig. 3 and 4, the adjacent signal transmission sections 31 are directly connected. The method is simple and easy to realize, and saves materials and working procedures.

Alternatively, referring to fig. 6 to 8, the display panel further includes at least one first connection portion 33, and the adjacent signal transmission portions 31 are connected by the first connection portion 33. This makes it possible to design the signal transmission unit more flexibly.

Here, the material, position, and the like of the first connection portion are not particularly limited, and the first connection portion may be disposed on the same layer as the signal transmission portion. At this time, the first connection portions may be arranged in any direction, for example: the first connection portions may be arranged in the first direction and/or the second direction. Fig. 6 to 8 are each illustrated by taking an example in which the first connecting portions 33 are arranged in the OA direction and the OB direction.

Alternatively, as shown in fig. 3, the adjacent signal transmission units 32 are directly connected. The method is simple and easy to realize, and saves materials and working procedures.

Alternatively, as shown in fig. 5, the display panel further includes at least one second connection part 34 through which adjacent signal transmission units are connected. This allows a more flexible design of the signal transmission unit.

Here, the material, the position, and the like of the second connection portion are not particularly limited, and for example, the second connection portion may be disposed on the same layer as the signal transmission unit.

Here, the material, the position, and the like of the second connection portion are not particularly limited, and for example, the second connection portion may be disposed on the same layer as the signal transmission unit. At this time, the second connection portions may be arranged in any direction, for example, the first connection portions may be arranged in the first direction and/or the second direction. Fig. 5 illustrates an example in which the second connecting portions 34 are arranged along the OA direction and in a direction having an angle with the OA direction.

Optionally, the signal transmission structure is a power signal line.

Here, the kind of the power supply signal line is not particularly limited, and the power supply signal line may be a VSS line, for example.

In the display panel provided in the embodiment of the application, on one hand, since the signal transmission part is disposed around at least part of the light emitting unit, the current on the power signal line (VSS line) can be dispersed to the signal transmission part disposed in the display region, so that the current on the power signal line (VSS line) is dispersed to the periphery of the light emitting unit, and thus, the voltage Drop (IR-Drop) of the VSS line can be effectively reduced without adding an additional process and changing the overlapping of the existing VSS line in the frame region, thereby reducing the power consumption of the display panel; on the other hand, the current on the VSS line is not totally flowed into the driving chip (IC) from the edge of the display panel, but is dispersed to each signal transmission part in the display area, and the problem of local heating at the edge of the display panel is obviously improved; on the other hand, the current paths of the VSS lines are changed from two-dimensional distribution to three-dimensional distribution, and the current of the VSS lines can flow into the IC after being converged from the cathode layer to the periphery and can also be converged to the IC through the signal transmission part below the cathode layer, namely the current in the display area has upper and lower layers of current paths, which is more beneficial to dispersing the current; on the other hand, the signal transmission structure is at least arranged on the same layer as the first electrode in the display area and is insulated from the first electrode, so that the signal transmission structure and the first electrode can be wired along the light-emitting unit, the conventional four-metal process (namely, a single SD process) can be compatible, an additional metal layer is not required, and the method is simple and easy to implement.

Alternatively, referring to fig. 1, a pixel defining layer 7 is disposed between adjacent light emitting units 2, and the pixel defining layer 7 is partially located on a side of the first electrode 21 away from the substrate 1; an orthogonal projection E1 of each signal transmission section 31 on the substrate 1 is located within an orthogonal projection E2 of the pixel defining layer 7 on the substrate 1.

Referring to fig. 10 and 11, the pixel defining layer 7 has a via hole k at an edge of the display area, and the signal transmission structure 3 is electrically connected to the second electrode 22 through the via hole k.

Here, the material of the pixel defining layer is not particularly limited, and for example, the material of the pixel defining layer may include organic materials, such as: polyimide, acrylic, polyethylene terephthalate, and the like.

Fig. 11 shows a connection relationship at one top corner of the display panel. Referring to fig. 11, the signal transmission structure 3 is electrically connected to the second electrode 22 through the via k.

In the display panel provided by the embodiment of the application, on one hand, the signal transmission part does not influence the light emitting unit to emit light, so that the power consumption of the display panel can be reduced on the basis of not influencing the light emitting efficiency of the display panel; on the other hand, the signal transmission structure in the display area can be electrically connected with the cathode, and the signal transmission structure in the display area is lapped with the peripheral VSS line, so that an additional via hole design is not needed, namely, a line crossing-transfer layer is not needed, and the process flow is saved.

Optionally, referring to fig. 1, 12 and 13, the display panel further includes a plurality of driving units arranged in an array, where the driving units are disposed on one side of the substrate 1 close to the first electrode 21, and each driving unit includes a source/drain layer 81; the signal transmission structure 3 is further arranged on the same layer as the source-drain layer 81 and insulated, an orthographic projection of the signal transmission structure 3 on the substrate 1 is positioned within an orthographic projection of the pixel defining layer 7 on the substrate 1, the signal transmission structure 3 is at least partially arranged around the source-drain layer 81 of each of the at least two driving units and extends along a first direction (OA direction shown in FIG. 12) or a second direction (OB direction shown in FIG. 12); wherein the first direction is perpendicular to the second direction.

The structure, number, etc. of the driving units are not particularly limited, and each light emitting unit may be controlled by one driving unit; alternatively, a plurality of light emitting units may be controlled by one driving unit. For example, the driving unit may include a plurality of transistors and at least one storage capacitor, and for example, the driving unit may be designed as 2T1C, 3T1C, or 7T1C, where T represents a transistor and C represents a capacitor.

Referring to fig. 12, the display panel further includes a driving backplane 10, where the driving backplane 10 includes a buffer layer 82, an active layer 83, a gate insulating layer 84, a gate metal layer (including a gate 85), an insulating layer 86, an interlayer dielectric layer 87, a source-drain metal layer (including a source 811 and a drain 812), and a flat layer 80, which are sequentially stacked on the substrate 1. Wherein the first electrode 21 is electrically connected to the drain 812 through a via on the planarization layer 80. Only the contents related to the invention point are described here, and the rest of the structure can be obtained by referring to the related art, and will not be described in detail here.

Optionally, as shown in fig. 2 and 13, the light emitting unit further includes a plurality of light emitting function layers, the plurality of light emitting function layers are located between the first electrode 21 and the second electrode 22, and the plurality of light emitting function layers include a first light emitting function layer, a charge generation layer, and a second light emitting function layer, which are sequentially stacked on the first electrode 21; the signal transmission structure 3 is also positioned on the side of the pixel defining layer 7 far away from the substrate 1, the orthographic projection of the pixel defining layer 7 on the substrate 1 is positioned within the orthographic projection of the pixel defining layer 7 on the substrate 1, and at least one of the plurality of light-emitting functional layers is disconnected at the position of the signal transmission structure 3.

The charge generation layer is disconnected at the location of the signal transmission structure.

Fig. 2 is illustrated by taking an example in which each light-emitting unit includes two light-emitting layers (a first light-emitting layer and a second light-emitting layer). In the same light emitting unit, the first light emitting layer and the second light emitting layer may be light emitting layers emitting light of the same color; alternatively, in the same light emitting unit, the first light emitting layer and the second light emitting layer may be light emitting layers emitting different colors of light. The light emitted by the multiple light emitting layers included in the light emitting unit can be mixed into white light by arranging the light emitting layers emitting light of different colors in the same light emitting unit, and the color of emergent light of each light emitting unit is adjusted by arranging the color film layer.

Referring to fig. 2, the display panel includes a hole injection layer 26R, a hole transport layer 27R, a first light emitting layer 23R, a first electron transport layer 28R, a charge generation layer 25R, a second light emitting layer 24R, a second electron transport layer 29R, and a cathode 22R, which are stacked in this order on a first electrode 21R to match red. The structure matching with green and the structure matching with blue can refer to the structure matching with red, and the description is omitted here.

Here, the material of the charge generation layer is not particularly limited, and may include, for example, an n-type doped layer for generating holes and a p-type doped layer for generating electrons, which are stacked, for example: n-type doped organic layer/p-type doped organic layer, e.g. BPhen: cs/NPB: F4-TCNQ, alq ₃ :Li/NPB:FeCl ₃ 、TPBi:Li/NPB:FeCl ₃ 、Alq ₃ Mg/m-MTDATA F4-TCNQ, etc. Of course, the charge generation layer material may also include n-type doped organic layers/inorganic metal oxides, such as Alq, but is not limited thereto ₃ :Mg/WO ₃ ，Bphen:Li/MoO ₃ ，BCP:Li/V ₂ O ₅ And BCP Cs/V ₂ O ₅ (ii) a Alternatively, n-type doped organic layer/organic layer, e.g. Alq ₃ Li/HAT-CN; alternatively, undoped materials, e.g. F ₁₆ CuPc/CuPc and Al/WO ₃ /Au。

With the continuous development of display technology, the pursuit of users for display quality is higher and higher. To further reduce power consumption and achieve high luminance, a single light emitting layer in a light emitting cell in an OLED display panel may be replaced with two light emitting layers, and a Charge Generation Layer (CGL) may be added between the two light emitting layers to achieve a dual light emitting (Tandem EL) design. Since a display panel employing a dual-layer light emission (Tandem EL) design has two light emitting layers, its light emission luminance can be approximately equivalent to twice that of a single light emitting layer. Therefore, the display panel adopting the double-layer light-emitting design has the advantages of long service life, low power consumption, high brightness and the like. In addition, by providing the above-described signal transmission structure between adjacent light emitting cells, the display panel can prevent crosstalk between adjacent light emitting cells caused by a highly conductive charge generation layer in the light emitting cells. Meanwhile, the display panel can realize a double-layer light emitting (Tandem EL) design, so that the display panel has the advantages of long service life, low power consumption, high brightness and the like.

It should be noted that the signal transmission structure may also be located at other positions in the display panel, such as between adjacent light emitting units.

The charge generation layer is configured to generate carriers, transport carriers, and inject carriers.

In some examples, it may also be provided that the first and second light emitting layers are also disconnected at the location of the signal transmission structure. However, the embodiments of the present disclosure include, but are not limited to, that the first light emitting layer and the second light emitting layer may be not disconnected at the position where the signal transmission structure is located, but only the charge generation layer is disconnected at the position where the signal transmission structure is located.

In some examples, the electric conductivity of the charge generation layer is greater than the electric conductivity of the first light emitting layer and the electric conductivity of the second light emitting layer, and is less than the electric conductivity of the second electrode.

The embodiment of the application also provides a display device, which comprises the display panel.

The display device may be a display device having a touch function, or may also be a display device having a folding or rolling function, or may also be a display device having both a touch function and a folding function, which is not limited herein. The display device may be a flexible display device (also referred to as a flexible screen) or a rigid display device (i.e., a display screen that cannot be bent), which is not limited herein.

The display device can be an OLED display device, a Micro LED display device or a Mini LED display device.

The display device can be any product or component with a display function, such as a television, a digital camera, a mobile phone, a tablet computer and the like; the display device can also be applied to the fields of identity recognition, medical instruments and the like, and products which are popularized or have good popularization prospects comprise security identity authentication, intelligent door locks, medical image acquisition and the like. The display device has the advantages of low power consumption, good heat dissipation, low cost, good display effect, long service life, high stability, high contrast, good imaging quality, high product quality and the like.

The embodiment of the application also provides a preparation method of the display panel.

The method comprises the following steps:

s1, providing a substrate.

And S2, forming a signal transmission structure and a plurality of light-emitting units arranged in an array on the substrate.

The light-emitting unit is arranged on the substrate and comprises a first electrode and a second electrode, and the second electrode is positioned on one side, far away from the substrate, of the first electrode; the signal transmission structure is at least arranged on the same layer as the first electrode and insulated from the first electrode, and comprises at least one signal transmission part which is arranged around at least part of the light-emitting unit and electrically connected with the second electrode.

By executing the steps S1 and S2, on one hand, since the signal transmission part is disposed around at least a portion of the light emitting unit, the current in the display panel can be dispersed to the signal transmission part disposed in the display region, so that the current in the display panel can be dispersed to the periphery of the light emitting unit, thereby effectively reducing the voltage Drop (IR-Drop) of the VSS line without adding an additional process and changing the overlapping of the existing VSS line in the frame region, and further reducing the power consumption of the display panel; on the other hand, the current in the display panel does not flow into the driving chip (IC) from the edge of the display panel, but is dispersed to each signal transmission part in the display area, and the problem of local heating at the edge of the display panel is improved remarkably; on the other hand, the current paths in the display panel are changed from two-dimensional distribution to three-dimensional distribution, and the current in the display panel can flow into the IC after being converged from the cathode layer to the periphery and can also be converged to the IC through the signal transmission part below the cathode layer, namely the current in the display area has upper and lower layers of current paths, which is more beneficial to current dispersion; on the other hand, the signal transmission structure is at least arranged on the same layer as the first electrode in the display area and is insulated from the first electrode, so that the signal transmission structure and the first electrode can be wired along the light-emitting unit, the conventional four-metal process (namely, a single SD process) can be compatible, an additional metal layer is not required, and the method is simple and easy to implement.

Referring to fig. 12, a specific method of manufacturing a display panel is provided below.

S20, providing a substrate 1.

S21, a buffer layer 82 is formed on the substrate 1.

S22, an active layer 83 is formed on the buffer layer 82.

S23, a gate insulating layer 84 is formed on the active layer 83.

S24, a gate electrode 85 is formed on the gate insulating layer 84.

S25, an insulating layer 86 is formed on the gate electrode 85.

S26, an interlayer dielectric layer 87 is formed on the insulating layer 86.

And S27, forming a flat layer 80 on the interlayer dielectric layer 87.

S28, the first electrode 21 and the plurality of signal transmission portions 31 are formed on the planarization layer 80.

S29, the pixel defining layer 7 is formed on the first electrode 21 and the plurality of signal transmitting portions 31.

S30, a hole transport layer 27 is formed in the opening of the adjacent pixel defining layer 7.

S31, the first light-emitting layer 23 is formed on the hole transport layer 27.

S32, forming a first electron transport layer 28 on the first light emitting layer 23.

S33, the second electrode 22 is formed on the first electron transit layer 28.

For the structural description of the display panel in the embodiment of the present application, reference may be made to the above embodiments, which are not described herein again.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A display panel comprising a display area, the display area comprising:

a substrate;

the light-emitting units are arranged on the substrate in an array mode and comprise first electrodes and second electrodes, and the second electrodes are located on one sides, far away from the substrate, of the first electrodes;

2. The display panel according to claim 1, wherein the signal transmission structure comprises a plurality of the signal transmission portions, each of the signal transmission portions is disposed around at least a portion of one of the light emitting cells, and all of the signal transmission portions are electrically connected and electrically connected to the second electrode.

3. The display panel according to claim 2, wherein each of the signal transmission portions is provided around a periphery of one of the light emitting units.

4. The display panel according to claim 2, wherein any two adjacent signal transmission portions are directly connected to form a signal transmission unit, and the signal transmission unit is disposed around at least a part of the two light emitting units and is disconnected between the two light emitting units.

5. The display panel according to claim 2, wherein all the light emitting units include the light emitting units of at least two different colors, and the signal transmission portion is provided around at least part of the light emitting units of at least one color.

6. The display panel according to claim 2, wherein all the signal transmission portions form a lattice structure.

7. The display panel according to claim 2, wherein all of the light emitting units include a plurality of first color light emitting units, a plurality of second color light emitting units, and a plurality of third color light emitting units, and the signal transmission portion at least partially surrounds one of the first color light emitting units, one of the second color light emitting units, or one of the third color light emitting units.

8. The display panel according to claim 7, wherein all of the first color light emitting cells and all of the second color light emitting cells are alternately arranged in a first direction and a second direction to form a plurality of first pixel rows and a plurality of first pixel columns, all of the third color light emitting cells are arrayed in the first direction and the second direction to form a plurality of second pixel rows and a plurality of second pixel columns, the plurality of first pixel rows and the plurality of second pixel rows are alternately arranged in the second direction and are staggered in the first direction, and the plurality of first pixel columns and the plurality of second pixel columns are alternately arranged in the first direction and are staggered in the second direction; wherein the first direction is perpendicular to the second direction;

9. The display panel according to claim 7, wherein all the light emitting cells are divided into a plurality of light emitting cell groups, each of which includes one light emitting cell of the first color, two light emitting cells of the second color, and one light emitting cell of the third color; in each of the light emitting unit groups, the first color light emitting units and the third color light emitting units are arranged along a first direction, and the two second color light emitting units are adjacently arranged in a second direction and are located between the first color light emitting units and the third color light emitting units; wherein the first direction is perpendicular to the second direction;

10. The display panel according to claim 7, wherein all the light emitting cells are divided into a plurality of light emitting cell groups, each of which includes one light emitting cell of the first color, one light emitting cell of the second color, and one light emitting cell of the third color; in each of the light emitting unit groups, the first color light emitting unit or the second color light emitting unit and the third color light emitting unit are arranged in a first direction, and the first color light emitting unit or the second color light emitting unit is arranged in a second direction; wherein the first direction is perpendicular to the second direction;

11. The display panel according to claim 7, wherein the first color light-emitting unit, the second color light-emitting unit, and the third color light-emitting unit are sequentially arranged in a first direction to form pixel groups, and a plurality of the pixel groups are arranged in the first direction to form pixel rows; a plurality of the pixel rows are arranged along a second direction to form an array; wherein the first direction is perpendicular to the second direction;

12. The display panel according to claim 2, wherein adjacent signal transmission sections are directly connected;

13. The display panel according to claim 3, wherein adjacent ones of the signal transmission units are directly connected;

14. The display panel according to claim 1, wherein the signal transmission structure is a power signal line.

15. The display panel according to claim 1, wherein a pixel defining layer is provided between adjacent ones of the light emitting cells, the pixel defining layer being partially located on a side of the first electrode away from the substrate;

the pixel defining layer has a via hole at an edge of the display region, and the signal transmission structure is electrically connected to the second electrode through the via hole.

16. The display panel according to claim 1, further comprising a plurality of driving units arranged in an array, wherein the driving units are disposed on a side of the substrate close to the first electrode, and each driving unit comprises a source drain layer;

17. The display panel according to claim 1, wherein the light emitting unit further comprises a plurality of light emitting functional layers between the first electrode and the second electrode, the plurality of light emitting functional layers including a first light emitting functional layer, a charge generation layer, and a second light emitting functional layer which are sequentially stacked over the first electrode;

18. A display device characterized by comprising the display panel according to any one of claims 1 to 17.

19. A method for manufacturing a display panel according to any one of claims 1 to 17, comprising:

providing a substrate;