Display panel, preparation method thereof and display device

Abstract

The embodiment of the invention provides a display panel, a preparation method thereof and a display device, and relates to the technical field of display. A display area of the display panel comprises a transparent area and a wiring area which are located among a plurality of sub-pixels, each sub-pixel comprises an anode, a light-emitting layer and a cathode which are sequentially stacked, and the anodes, the light-emitting layers and the cathodes all extend to the wiring area. The anode comprises a first part located in the wiring area, the light-emitting layer comprises a second part located in the wiring area, the cathode comprises a third part located in the wiring area, and the orthographic projection of the first part on the substrate, the orthographic projection of the second part on the substrate and the orthographic projection of the third part on the substrate are overlapped. Namely, the anode, the light-emitting layer and the cathode of the sub-pixel are subjected to extension design in the wiring area, the area of the display area is fully utilized, the area of the light-emitting area of the sub-pixel is increased, the display brightness is improved, and a good display effect is obtained.

Description

Technical Field

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

[0002] Due to the transparent characteristics of large-size organic light-emitting diode (OLED) transparent display panels, additional transparent areas are required on the display panels, which will limit the pixel brightness, resulting in problems of insufficient brightness and poor display effects for large-size OLED display panels. Summary of the Invention

[0003] This application provides a display panel, a preparation method thereof, and a display device, aiming to improve the display brightness and obtain good display effects.

[0004] To achieve the above object, the embodiments of this application provide the following technical solutions:

[0005] In a first aspect, this application provides a display panel. The display panel includes a display area. The display panel includes a substrate and a plurality of sub-pixels disposed on the substrate. The plurality of sub-pixels are located in the display area. The display area includes a transparent area and a routing area located between the plurality of sub-pixels. Each sub-pixel includes an anode, a light-emitting layer, and a cathode stacked in sequence. The anode, the light-emitting layer, and the cathode all extend to the routing area. The anode includes a first portion located in the routing area, the light-emitting layer includes a second portion located in the routing area, and the cathode includes a third portion located in the routing area. The orthographic projection of the first portion on the substrate, the orthographic projection of the second portion on the substrate, and the orthographic projection of the third portion on the substrate all overlap.

[0006] In some embodiments, the plurality of sub-pixels are arranged in an array, and the plurality of sub-pixels include multiple rows and multiple columns. The display area includes a plurality of routing areas. The plurality of routing areas include a plurality of first routing areas and a plurality of second routing areas. The first routing areas are located between adjacent rows of sub-pixels, and the second routing areas are located between adjacent columns of sub-pixels. The anode, the light-emitting layer, and the cathode all extend to the first routing areas. The anode includes a first portion located in the first routing areas, the light-emitting layer includes a second portion located in the first routing areas, and the cathode includes a third portion located in the first routing areas.

[0007] In some embodiments, the plurality of sub-pixels are arranged in an array, and the plurality of sub-pixels include multiple rows and multiple columns. The display area includes a plurality of routing areas. The plurality of routing areas include a plurality of first routing areas and a plurality of second routing areas. The first routing areas are located between adjacent rows of sub-pixels, and the second routing areas are located between adjacent columns of sub-pixels. The anode, the light-emitting layer, and the cathode all extend to the second routing areas. The anode includes a first portion located in the second routing areas, the light-emitting layer includes a second portion located in the second routing areas, and the cathode includes a third portion located in the second routing areas.

[0008] In some embodiments, along the column direction of multiple sub-pixels, the transparent region is located between the multiple sub-pixels. In the row direction of the multiple sub-pixels, the first portion overlaps with the transparent region, the second portion overlaps with the transparent region, and the third portion overlaps with the transparent region.

[0009] In some embodiments, the multiple sub-pixels are arranged in an array, and the multiple sub-pixels include multiple rows and multiple columns. The display region includes multiple wiring regions, and the multiple wiring regions include multiple first wiring regions and multiple second wiring regions. The first wiring regions are located between adjacent rows of sub-pixels, and the second wiring regions are located between adjacent columns of sub-pixels. The anode, the light-emitting layer, and the cathode all extend to the first wiring regions and the second wiring regions. The anode includes a first portion located in the first wiring regions and the second wiring regions, the light-emitting layer includes a second portion located in the first wiring regions and the second wiring regions, and the cathode includes a third portion located in the first wiring regions and the second wiring regions.

[0010] In some embodiments, the display panel further includes multiple wirings, and the multiple wirings are disposed in the wiring regions. The material of the anode includes a reflective material, and the orthographic projection of the first portion on the substrate overlaps with the orthographic projection of the wiring on the substrate.

[0011] In some embodiments, the display panel further includes multiple wirings, and the multiple wirings are disposed in the wiring regions. The material of the anode includes a light-transmissive material, and the orthographic projection of the first portion on the substrate does not overlap with the orthographic projection of the wiring on the substrate.

[0012] In some embodiments, the display panel further includes a pixel defining layer, and the pixel defining layer is disposed on the side of the anode away from the substrate. The pixel defining layer includes multiple openings, and the openings extend to the wiring regions. In the wiring regions, at least a part of the first portion is exposed by the openings, at least a part of the second portion is located within the openings, and the third portion covers the openings.

[0013] In a second aspect, the present application further provides a method for manufacturing a display panel, including the following steps S10 to step S30:

[0014] Step S10: Form an anode on the substrate, and the anode extends to the wiring regions. The anode includes a first portion located in the wiring regions.

[0015] Step S20: Form a light-emitting layer on the side of the anode away from the substrate, and the light-emitting layer extends to the wiring regions. The light-emitting layer includes a second portion located in the wiring regions.

[0016] Step S30: Form a cathode on the side of the light-emitting layer away from the substrate, and the cathode extends to the wiring regions. The cathode includes a third portion located in the wiring regions.

[0017] Wherein, the orthographic projections of the first portion, the second portion, and the third portion on the substrate all overlap.

[0018] On the other hand, the present application also provides a display device, which includes the display panel in any of the above embodiments and a controller electrically connected to the display panel.

[0019] In the embodiments of the present application, the display area of the display panel includes a plurality of sub-pixels, as well as a transparent area and a wiring area located between the plurality of sub-pixels. The sub-pixel includes an anode, a light-emitting layer, and a cathode stacked in sequence, and the anode, the light-emitting layer, and the cathode all extend to the wiring area. The anode includes a first part located in the wiring area, the light-emitting layer includes a second part located in the wiring area, the cathode includes a third part located in the wiring area, and the orthographic projection of the first part on the substrate, the orthographic projection of the second part on the substrate, and the orthographic projection of the third part on the substrate all overlap. That is, by extending the anode, the light-emitting layer, and the cathode of the sub-pixel in the wiring area, the area of the display area is fully utilized, the area of the light-emitting region of the sub-pixel is increased, and different extension design schemes can be applied in different scenarios, so as to meet the requirements of different scenarios, improve the display brightness, and obtain a good display effect.

[0020] The above display device has the same structure and beneficial technical effects as the display panel provided in some of the above embodiments, and will not be elaborated here. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the present application, the drawings required to be used in some embodiments of the present application will be briefly introduced below. Obviously, the drawings in the following description are only the drawings of some embodiments of the present application, and those of ordinary skill in the art can also obtain other drawings according to these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and do not represent the actual dimensions of the products involved in the embodiments of the present application or the actual processes of the methods.

[0022] Figure 1 Structural diagram of the display panel provided in the embodiment of the present application;

[0023] Figure 2 For Figure 1 Partial enlarged view of the display panel in

[0024] Figure 3 For Figure 2 Partial cross-sectional view of the display panel in

[0025] Figure 4 Partial enlarged view of another display panel provided in the embodiment of the present application;

[0026] Figure 5 Partial enlarged view of yet another display panel provided in the embodiment of the present application;

[0027] Figure 6A partial enlarged view of another display panel provided by an embodiment of the present application;

[0028] Figure 7 A flowchart of a method for manufacturing a display panel provided by an embodiment of the present application;

[0029] Figures 8A to 8D A diagram showing the manufacturing steps of a display panel provided by an embodiment of the present application;

[0030] Figure 9 A schematic structural diagram of a display device provided by an embodiment of the present application. Detailed implementation manners

[0031] Next, in conjunction with the accompanying drawings, the technical solutions in some embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments provided by the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0032] Unless otherwise required by the context, throughout the specification and claims, the term "comprising" is interpreted in an open, inclusive sense, that is, "including, but not limited to".

[0033] Hereinafter, the terms "first" and "second" are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the number of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0034] When describing some embodiments, the expression "connected" and its derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connected" may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components have direct physical contact or electrical contact with each other.

[0035] In addition, the use of "based on" means open and inclusive, because a process, step, calculation, or other action "based on" one or more of the stated conditions or values may in practice be based on additional conditions or values beyond the stated ones.

[0036] It should be understood that when a layer or element is referred to as being on another layer or substrate, it may be that the layer or element is directly on the other layer or substrate, or there may be an intermediate layer between the layer or element and the other layer or substrate.

[0037] Exemplary embodiments are described with reference to cross-sectional views as idealized exemplary drawings. In the drawings, the thickness of layers and the area of regions are exaggerated for clarity. Thus, variations in the shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances can be envisioned. Accordingly, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but include shape deviations caused by, for example, manufacturing. For example, an etched region shown as rectangular will generally have curved features. Thus, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shape of the regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0038] Large-sized transparent display panels are currently widely used, and their application scenarios can be divided into single-sided display scenarios and double-sided display scenarios. Due to their transparent characteristics, there are transparent regions on the display panel, resulting in a reduced pixel density, and problems such as insufficient brightness and poor display effects on the display panel.

[0039] To solve the above problems, in a first aspect, the present application provides a display panel, as Figures 1 to 3 shown, Figure 1 is a structural diagram of the display panel provided by an embodiment of the present application, Figure 2 is Figure 1 a partial enlarged view of the display panel in Figure 3 at M, Figure 2 is a partial cross-sectional view of the display panel in

[0040] As Figure 1 shown, the display panel 10 includes a display area 11. As Figure 2 and Figure 3 shown, the display panel 10 includes a substrate 100 and a plurality of sub-pixels 21 disposed on the substrate 100. As Figure 3 shown, taking one sub-pixel 21 as an example, each sub-pixel 21 includes a pixel driving circuit 22 and a light-emitting device 23.

[0041] Exemplarily, as Figure 3 shown, the pixel driving circuit 22 includes a plurality of transistors T1, and each transistor T1 includes a gate G, a source S, and a drain D. The gate G can be used to receive a gate scanning signal, and the source S can be used to receive a data signal.

[0042] The light-emitting device 23 includes an anode 103, a light-emitting layer 104, and a cathode 105 stacked in sequence. The drain D of the transistor T1 is electrically connected to the anode 103 of the light-emitting device 23 to provide a driving voltage signal for the anode 103. The cathode 105 also receives a voltage signal, and under the electric field drive of the anode 103 and the cathode 105, the light-emitting layer 104 emits light.

[0043] As Figure 2As shown, a plurality of sub-pixels 21 are located in the display area 11, and the display area 11 includes a transparent area 12 and a wiring area 13 located between the plurality of sub-pixels 21. Among them, the film layer of the display panel 10 located in the transparent area 12 can transmit light, thereby realizing the transparent display characteristic of the display panel 10. The wiring area 13 is used to set a variety of wirings L. The variety of wirings L may include a gate line L1 and a data line L2. The gate line L1 is electrically connected to the gate G of the transistor T1 in the sub-pixel 21 and is used to transmit a gate scanning signal to the gate G. The data line L2 is electrically connected to the source S of the transistor T1 in the sub-pixel 21 and is used to transmit a data signal to the source S.

[0044] In an embodiment of the present application, as Figure 2 and Figure 3 shown, the anode 103, the light-emitting layer 104, and the cathode 105 of the sub-pixel 21 all extend to the wiring area 13. Among them, the anode 103 includes a first portion 1031 located in the wiring area 13, the light-emitting layer 104 includes a second portion 1041 located in the wiring area 13, the cathode 105 includes a third portion 1051 located in the wiring area 13, and the orthographic projection of the first portion 1031 on the substrate 100, the orthographic projection of the second portion 1041 on the substrate 100, and the orthographic projection of the third portion 1051 on the substrate 100 all overlap.

[0045] That is, in an embodiment of the present application, the opening of the sub-pixel 21 extends to the wiring area 13, making full use of the area of the wiring area 13, increasing the aperture ratio of the sub-pixel 21, increasing the area of the light-emitting region of the sub-pixel 21, which is beneficial to improving the display brightness of the display panel 10 and obtaining a good display effect.

[0046] Moreover, different sub-pixel 21 extension design schemes can be applied in different display scenarios to meet the requirements of different display scenarios. The following embodiments of the present application provide several sub-pixel 21 extension design schemes.

[0047] In some embodiments, as Figure 2 shown, a plurality of sub-pixels 21 are arranged in an array. The plurality of sub-pixels 21 include multiple rows and multiple columns, and the display area 11 includes a plurality of wiring areas 13 located between the plurality of sub-pixels 21.

[0048] The plurality of wiring areas 13 include a plurality of first wiring areas 131 and a plurality of second wiring areas 132. The first wiring area 131 is located between adjacent two rows of sub-pixels 21. Exemplarily, the gate line L1 can be set in the first wiring area 131. The second wiring area 132 is located between adjacent two columns of sub-pixels 21. Exemplarily, the data line L2 can be set in the second wiring area 132.

[0049] In the process of extending the design of the anode 103, the light-emitting layer 104, and the cathode 105 of the sub-pixel 21 in the wiring area 13 in this application, the distribution of the wiring area 13 and its wiring settings can be comprehensively considered.

[0050] In some embodiments, such as Figure 2 shown, in combination with Figure 2 and Figure 3 It can be understood that the anode 103, the light-emitting layer 104, and the cathode 105 of the sub-pixel 21 all extend to the second wiring area 132. The anode 103 includes a first part 1031 located in the second wiring area 132, the light-emitting layer 104 includes a second part 1041 located in the second wiring area 132, and the cathode 105 includes a third part 1051 located in the second wiring area 132.

[0051] That is to say, in the embodiments of this application, in the second wiring area 132, not only the data line L2 is provided, but also the first part 1031 of the anode 103, the second part 1041 of the light-emitting layer 104, and the third part 1051 of the cathode 105 are provided. That is, the light-emitting area of the sub-pixel 21 includes the part extending to the second wiring area 132. The opening of the sub-pixel 21 extends to the second wiring area 132, making full use of the area of the second wiring area 132, improving the aperture ratio of the sub-pixel 21, and increasing the area of the light-emitting region of the sub-pixel 21. Through reasonable design, the light-emitting effect of this part is not affected by the data line L2, so that the display brightness of the display panel 10 can be improved and a good display effect can be obtained.

[0052] Exemplarily, such as Figure 2 shown, in some embodiments, along the column direction Y of the plurality of sub-pixels 21, the transparent area 12 is located between the plurality of sub-pixels 21. In the row direction X of the plurality of sub-pixels 21, the second wiring area 132 is also located between two adjacent transparent areas 12. And, in the row direction X, the first part 1031 of the anode 103 extending to the second wiring area 132 overlaps with the transparent area 12, the second part 1041 of the light-emitting layer 104 extending to the second wiring area 132 overlaps with the transparent area 12, and the third part 1051 of the cathode 105 extending to the second wiring area 132 overlaps with the transparent area 12.

[0053] Combined with Figure 3 it can be understood that the second wiring area 132 includes the area between two adjacent transparent areas 12. The wiring settings in this area are relatively simple and there is no need for cross-wiring connection of different wirings. Therefore, this area can be utilized.

[0054] Based on this, extending the opening of the sub-pixel 21 to the area of the second wiring region 132 between two adjacent transparent regions 12 can not only make full use of the area of the wiring region 13 and increase the aperture ratio of the sub-pixel 21, but also minimize the complexity of the structural design of the display panel 10. In the case of improving the display brightness of the display panel 10 and obtaining a good display effect, the situation where the process is difficult to implement is avoided.

[0055] Alternatively, in some embodiments, as Figure 4 shown, Figure 4 is a partial enlarged view of another display panel provided by an embodiment of the present application. Combining Figure 3 and Figure 4 it can be understood that the anode 103, the light-emitting layer 104, and the cathode 105 of the sub-pixel 21 all extend to the first wiring region 131. The anode 103 includes a first portion 1031 located in the first wiring region 131, the light-emitting layer 104 includes a second portion 1041 located in the first wiring region 131, and the cathode 105 includes a third portion 1051 located in the first wiring region 131.

[0056] That is to say, in the embodiment of the present application, not only the gate line L1 is provided in the first wiring region 131, but also the first portion 1031 of the anode 103, the second portion 1041 of the light-emitting layer 104, and the third portion 1051 of the cathode 105 are provided. That is, the light-emitting area of the sub-pixel 21 includes the part extending to the first wiring region 131, and the opening of the sub-pixel 21 extends to the first wiring region 131, making full use of the area of the first wiring region 131, increasing the aperture ratio of the sub-pixel 21, and increasing the area of the light-emitting region of the sub-pixel 21. Through reasonable design, the light-emitting effect of this part is not affected by the gate line L1, so that the display brightness of the display panel 10 can be improved and a good display effect can be obtained.

[0057] Or, in some embodiments, as Figure 5 shown, Figure 5 is a partial enlarged view of yet another display panel provided by an embodiment of the present application. The anode 103, the light-emitting layer 104, and the cathode 105 of the sub-pixel 21 all extend to the first wiring region 131 and the second wiring region 132. The anode 103 includes a first portion 1031 located in the first wiring region 131 and the second wiring region 132, the light-emitting layer 104 includes a second portion 1041 located in the first wiring region 131 and the second wiring region 132, and the cathode 105 includes a third portion 1051 located in the first wiring region 131 and the second wiring region 132.

[0058] That is, in the embodiment of the present application, in the first wiring region 131, not only the gate line L1 is provided, but also the first part 1031 of the anode 103, the second part 1041 of the light-emitting layer 104, and the third part 1051 of the cathode 105 are provided. That is, the light-emitting area of the sub-pixel 21 includes a part extending into the first wiring region 131. Through reasonable design, the light-emitting effect of this part is not affected by the gate line L1.

[0059] Moreover, in the second wiring region 132, not only the data line L2 is provided, but also the first part 1031 of the anode 103, the second part 1041 of the light-emitting layer 104, and the third part 1051 of the cathode 105 are provided. That is, the light-emitting area of the sub-pixel 21 includes a part extending into the second wiring region 132. Through reasonable design, the light-emitting effect of this part is not affected by the data line L2.

[0060] In this embodiment, the opening of the sub-pixel 21 extends to both the first wiring region 131 and the second wiring region 132, making full use of the areas of the first wiring region 131 and the second wiring region 132, improving the aperture ratio of the sub-pixel 21, increasing the area of the light-emitting region of the sub-pixel 21, which is beneficial to improving the display brightness of the display panel 10 and obtaining a good display effect.

[0061] To ensure that the light-emitting effect of the part of the sub-pixel 21 extending into the wiring region 13 is not affected by the wiring, when conducting the extension design and wiring arrangement, it can be comprehensively considered in combination with different application scenarios of the display panel 10.

[0062] In some embodiments, such as Figure 2 、 Figure 4 and Figure 5 shown, the material of the anode 103 includes a reflective material, and the orthographic projection of the first part 1031 on the substrate 100 overlaps with the orthographic projection of the wiring L on the substrate 100.

[0063] In a unidirectional display scenario, for example, the display panel 10 is a top-emission type. The light emitted by the light-emitting layer 104 can be reflected by the anode 103 to the cathode 105 side and penetrate the cathode 105 to be emitted outside the display panel 10, thereby achieving unidirectional display.

[0064] Taking Figure 2 the data line L2 in the second wiring region 132 shown as an example, in combination with Figure 2 and Figure 3, Generally, the data line L2 is arranged on the same layer as the source electrode S and the drain electrode D of the transistor T1, and the data line L2 is located between the substrate 100 and the anode 103. When the display panel 10 displays unidirectionally, the light-emitting direction is from the anode 103 to the cathode 105. Even if the orthographic projection of the first part 1031 of the anode 103 on the substrate 100 overlaps with the orthographic projection of the data line L2 on the substrate 100, since the data line L2 is located on the back side of the light-emitting direction of the light-emitting device 23, the data line L2 will not block the light emission and affect the light-emitting effect of the display panel 10.

[0065] In some other embodiments, such as Figure 6 shown, Figure 6 is a partial enlarged view of another display panel provided by the embodiment of the present application. The material of the anode 103 includes a light-transmitting material, and the orthographic projection of the first part 1031 on the substrate 100 does not overlap with the orthographic projection of the trace on the substrate 100.

[0066] In the double-sided display scenario, the light emitted by the light-emitting layer 104 penetrates both the anode 103 and is emitted in the direction pointing to the anode 103, and also penetrates the cathode 105 and is emitted in the direction pointing to the cathode 105, thereby realizing double-sided display.

[0067] Taking Figure 6 the data line L2 in the second trace area 132 shown as an example, combined with Figure 3 and Figure 6 it can be understood that when the display panel 10 displays double-sidedly, the light-emitting directions include both the direction from the light-emitting layer 104 to the cathode 105 and the direction from the light-emitting layer 104 to the anode 103. Therefore, the extended design of the data line L2 and the sub-pixel 21 needs to be avoided, that is, it is necessary to make the orthographic projection of the first part 1031 of the anode 103 on the substrate 100 not overlap with the orthographic projection of the data line L2 on the substrate 100. Based on this, in the light-emitting direction from the light-emitting layer 104 to the anode 103, it can be ensured that the light-emitting effect of the part where the sub-pixel 21 extends to the trace area 13 is not affected by the data line L2.

[0068] In some embodiments, such as Figure 3 shown, the display panel 10 further includes a pixel defining layer 106. The pixel defining layer 106 is arranged on the side of the anode 103 away from the substrate 100. The pixel defining layer 106 includes a plurality of openings V1, and each opening V1 extends to the trace area 13. In the trace area 13, the opening V1 exposes at least part of the first part 1031, at least part of the second part 1041 is located in the opening V1, and the third part 1051 covers the opening V1.

[0069] In the display panel 10, the area defined by the opening V1 of the pixel defining layer 106 can also be referred to as the effective light-emitting area. In the embodiments of the present application, by extending the opening V1 of the pixel defining layer 106 to the wiring area 13, the area of the second portion 1041 of the light-emitting layer 104 in the wiring area 13 can be increased, that is, the area of the effective light-emitting area of the sub-pixel 21 is increased, thereby facilitating improving the display brightness of the display panel 10 and obtaining a good display effect.

[0070] In a second aspect, the present application further provides a method for manufacturing a display panel, as Figure 7 shown, Figure 7 is a flowchart of the method for manufacturing the display panel provided by the embodiments of the present application, Figures 8A to 8D is a diagram showing the manufacturing steps of the display panel provided by the embodiments of the present application. The manufacturing method includes the following steps S10 to step S30:

[0071] Step S10: As Figure 8A shown, an anode 103 is formed on the substrate 100. The anode 103 extends to the wiring area 13, and the anode 103 includes a first portion 1031 located in the wiring area 13. In some embodiments, a pixel driving circuit 22 is formed on the substrate 100. The pixel driving circuit 22 includes a plurality of transistors T1, and each transistor T1 includes a gate G, a source S, and a drain D. The gate G can be used to receive a gate scanning signal, and the source S can be used to receive a data signal. After the anode 103 is formed, the anode 103 is electrically connected to the drain D of the transistor T1.

[0072] Exemplarily, in some embodiments, as Figure 8B shown, after step S10, a pixel defining layer 106 is further formed, and the opening V1 of the pixel defining layer 106 is extended to the wiring area 13, so that at least a part of the first portion 1031 is exposed by the opening V1.

[0073] Step S20: As Figure 8C shown, a light-emitting layer 104 is formed on the side of the anode 103 away from the substrate 100. The light-emitting layer 104 extends to the wiring area 13, and the light-emitting layer 104 includes a second portion 1041 located in the wiring area 13. At least a part of the second portion 1041 of the light-emitting layer 104 is located within the opening V1, and the boundary portion of the light-emitting layer 104 extends beyond the boundary of the opening and rests on the barrier wall of the pixel defining layer 106.

[0074] Step S30: As Figure 8D shown, a cathode 105 is formed on the side of the light-emitting layer 104 away from the substrate 100. The cathode 105 extends to the wiring area 13, and the cathode 105 includes a third portion 1051 located in the wiring area 13. The third portion 1051 of the cathode 105 covers the opening V1.

[0075] Among them, the orthographic projection of the first part 1031 on the substrate 100, the orthographic projection of the second part 1041 on the substrate 100, and the orthographic projection of the third part 1051 on the substrate 100 all overlap.

[0076] Based on the above preparation process, the extended design of the sub-pixel 21 can be realized in the wiring area 13, making full use of the area of the display area 11, increasing the area of the light-emitting region of the sub-pixel 21, improving the display brightness, and obtaining a good display effect.

[0077] On the other hand, the present application also provides a display device, which can be an Organic Light-Emitting Diode (OLED) display device. As shown in FIG. 8, FIG. 8 is a schematic structural diagram of the display device provided by the embodiment of the present application.

[0078] The display device 20 includes the display panel 10 in any of the above embodiments, and a controller 30 electrically connected to the display panel 10. The controller 30 can be disposed on the non-display side of the display panel 10 and is used to control the display panel 10 to perform screen display.

[0079] Since in the display panel 10, the anode 103, the light-emitting layer 104, and the cathode 105 of the sub-pixel 21 all extend to the wiring area 13, and in the wiring area 13, the orthographic projection of the first part 1031 of the anode 103 on the substrate 100, the orthographic projection of the second part 1041 of the light-emitting layer 104 on the substrate 100, and the orthographic projection of the third part 1051 of the cathode 105 on the substrate 100 all overlap, the area of the light-emitting region of the sub-pixel 21 is increased, which is beneficial to improving the display brightness and obtaining a good display effect.

[0080] Based on this, the display device 20 in the present application also has a high display brightness and a good display effect.

[0081] The above display device can be any device that displays both moving (e.g., video) and stationary (e.g., still images) and whether text or images. More specifically, it is contemplated that the embodiments can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rear view cameras in vehicles), electronic photos, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0082] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, who thinks of changes or substitutions, should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims described.

Claims

1. A display panel, characterized in that: including a display area; The display panel includes a substrate, and a plurality of sub-pixels arranged on the substrate; the plurality of sub-pixels are located in the display area, and the display area includes a transparent area and a wiring area located between the plurality of sub-pixels; The sub-pixel comprises an anode, a light-emitting layer and a cathode stacked in sequence, wherein the anode, the light-emitting layer and the cathode all extend to the wiring area; the anode comprises a first portion located in the wiring area, the light-emitting layer comprises a second portion located in the wiring area, and the cathode comprises a third portion located in the wiring area; An orthographic projection of the first portion on the substrate, an orthographic projection of the second portion on the substrate, and an orthographic projection of the third portion on the substrate all overlap.

2. The display panel according to claim 1, characterized in that: The plurality of sub-pixels are arranged in an array, and the plurality of sub-pixels include a plurality of rows and a plurality of columns; The display area includes a plurality of routing areas, and the plurality of routing areas include a plurality of first routing areas and a plurality of second routing areas; the first routing area is located between two adjacent rows of sub-pixels, and the second routing area is located between two adjacent columns of sub-pixels; The anode, the light-emitting layer and the cathode all extend to the first wiring area, the anode includes the first portion located in the first wiring area, the light-emitting layer includes the second portion located in the first wiring area, and the cathode includes the third portion located in the first wiring area.

3. The display panel according to claim 1, characterized in that: The plurality of sub-pixels are arranged in an array, and the plurality of sub-pixels include a plurality of rows and a plurality of columns; The display area includes a plurality of routing areas, and the plurality of routing areas include a plurality of first routing areas and a plurality of second routing areas; the first routing area is located between two adjacent rows of sub-pixels, and the second routing area is located between two adjacent columns of sub-pixels; The anode, the light-emitting layer and the cathode all extend to the second wiring area, the anode includes the first portion located in the second wiring area, the light-emitting layer includes the second portion located in the second wiring area, and the cathode includes the third portion located in the second wiring area.

4. The display panel according to claim 3, characterized in that: Along the column direction of the plurality of sub-pixels, the transparent area is located between the plurality of sub-pixels; In the row direction of the plurality of sub-pixels, the second wiring area is also located between two adjacent transparent areas, and the first portion overlaps with the transparent area, the second portion overlaps with the transparent area, and the third portion overlaps with the transparent area.

5. The display panel according to claim 1, characterized in that: The plurality of sub-pixels are arranged in an array, and the plurality of sub-pixels include a plurality of rows and a plurality of columns; The display area includes a plurality of routing areas, and the plurality of routing areas include a plurality of first routing areas and a plurality of second routing areas; the first routing area is located between two adjacent rows of sub-pixels, and the second routing area is located between two adjacent columns of sub-pixels; The anode, the light-emitting layer and the cathode all extend to the first routing area and the second routing area, the anode includes the first portion located in the first routing area and the second routing area, the light-emitting layer includes the second portion located in the first routing area and the second routing area, and the cathode includes the third portion located in the first routing area and the second routing area.

6. The display panel according to claim 1, characterized in that: The display panel further comprises a plurality of wirings, and the plurality of wirings are arranged in the wiring area; The material of the anode includes a reflective material, and the orthographic projection of the first portion on the substrate overlaps with the orthographic projection of the trace on the substrate.

7. The display panel according to claim 1, characterized in that: The display panel further comprises a plurality of wirings, and the plurality of wirings are arranged in the wiring area; The material of the anode includes a light-transmitting material, and the orthographic projection of the first portion on the substrate does not overlap with the orthographic projection of the trace on the substrate.

8. The display panel according to claim 1, characterized in that: The display panel further comprises a pixel defining layer, wherein the pixel defining layer is arranged on a side of the anode away from the substrate; The pixel definition layer includes a plurality of openings, and the openings extend to the wiring area; In the routing area, the opening exposes at least a portion of the first portion, at least a portion of the second portion is located in the opening, and the third portion covers the opening.

9. A method for preparing a display panel, characterized in that: include: forming an anode on the substrate, the anode extending to the wiring area, the anode comprising a first portion located in the wiring area; A light-emitting layer is formed on a side of the anode away from the substrate, the light-emitting layer extends to the wiring area, and the light-emitting layer includes a second portion located in the wiring area; A cathode is formed on a side of the light-emitting layer away from the substrate, the cathode extends to the wiring area, and the cathode includes a third portion located in the wiring area; The orthographic projection of the first portion on the substrate, the orthographic projection of the second portion on the substrate, and the orthographic projection of the third portion on the substrate all overlap.

10. A display device, characterized in that: include: The display panel according to any one of claims 1 to 8; A controller is electrically connected to the display panel.

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