Display panel and mobile terminal

Abstract

The present application provides a display panel and a mobile terminal. By means of configuring the charge transport rate of a second common portion to be lower than the charge transport rate of a first common portion, a charge transport capability of a common layer between two adjacent light-emitting units is reduced, such that when a light-emitting unit emits light, the current is prevented from being horizontally transported to the light-emitting unit adjacent thereto, thereby mitigating the problem of horizontal crosstalk in the display panel.

Description

Display panel and mobile terminal

[0001] This application claims priority to Chinese patent application No. 202410052264.5 filed on January 12, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The embodiments of the present application relate to the field of display technology, and in particular, to a display panel and a mobile terminal. Background Art

[0003] Currently, Organic Light Emitting Diode (OLED), as a new generation of solid-state self-luminous display technology, is widely used in various consumer electronic products such as mobile phones, televisions, personal digital assistants, digital cameras, laptops, desktop computers, etc. due to its advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream display device. With the development of flat panel display technology and the demand for multi-scene use, customers' requirements for the display effect of monitors are gradually increasing.

[0004] In some OLED display products, a common layer exists between different sub-pixels, which makes crosstalk between different sub-pixels easy to occur, especially at low brightness, making it difficult to accurately control low grayscale colors. In the existing technology, the crosstalk problem between sub-pixels is improved by replacing organic materials or setting isolation grooves between sub-pixels. However, the above methods have limited effects, are relatively complex, and easily increase the power consumption of the display device. SUMMARY OF THE INVENTION

[0005] Embodiments of the present application provide a display panel and a mobile terminal to alleviate the deficiencies in the related art.

[0006] To achieve the above functions, the technical solutions provided in the embodiments of the present application are as follows:

[0007] An embodiment of the present application provides a display panel, comprising a substrate and a light-emitting functional layer provided on the substrate, wherein the light-emitting functional layer comprises:

[0008] an anode layer, disposed on the substrate, the anode layer comprising a plurality of anodes;

[0009] a light-emitting layer, disposed on a side of the anode layer away from the substrate, the light-emitting layer comprising a plurality of light-emitting units, one light-emitting unit corresponding to one anode;

[0010] a cathode layer, disposed on a side of the light-emitting layer away from the anode layer; and

[0011] a common layer provided between the anode layer and the light-emitting layer, or / and, the common layer provided between the cathode layer and the light-emitting layer;

[0012] The common layer includes a first common portion and a second common portion, the first common portion is arranged corresponding to the light-emitting unit, and the second common portion is arranged between two adjacent light-emitting units. The charge transfer rate of the second common portion is smaller than the charge transfer rate of the first common portion.

[0013] An embodiment of the present application provides a mobile terminal, including a terminal body and a display panel, wherein the terminal body and the display panel are integrated into one body, the display panel including a substrate and a light-emitting functional layer provided on the substrate, the light-emitting functional layer including:

[0014] an anode layer, disposed on the substrate, the anode layer comprising a plurality of anodes;

[0015] a light-emitting layer, disposed on a side of the anode layer away from the substrate, the light-emitting layer comprising a plurality of light-emitting units, one light-emitting unit corresponding to one anode;

[0016] a cathode layer, disposed on a side of the light-emitting layer away from the anode layer; and

[0017] a common layer provided between the anode layer and the light-emitting layer, or / and, the common layer provided between the cathode layer and the light-emitting layer;

[0018] The common layer includes a first common portion and a second common portion, the first common portion is arranged corresponding to the light-emitting unit, and the second common portion is arranged between two adjacent light-emitting units. The charge transfer rate of the second common portion is smaller than the charge transfer rate of the first common portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0020] FIG1 is a schematic top view of a first display panel provided in an embodiment of the present application;

[0021] FIG2 is a first cross-sectional schematic diagram of FIG1 taken at AA′;

[0022] FIG3 is a second cross-sectional schematic diagram of FIG1 taken at AA′;

[0023] FIG4 is a third cross-sectional schematic diagram of FIG1 at AA';

[0024] FIG5 is a second schematic top view of a display panel provided in an embodiment of the present application;

[0025] FIG6 is a first cross-sectional schematic diagram of FIG5 at BB';

[0026] FIG7 is a third schematic top view of the display panel provided in an embodiment of the present application;

[0027] FIG8 is a fourth cross-sectional schematic diagram of FIG1 at AA′. Modes for Carrying Out the Invention

[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0029] An embodiment of the present application provides a display panel and a mobile terminal; the display panel includes a substrate and a light-emitting functional layer provided on the substrate, the light-emitting functional layer including: an anode layer provided on the substrate, the anode layer including a plurality of anodes; a light-emitting layer provided on a side of the anode layer away from the substrate, the light-emitting layer including a plurality of light-emitting units, one light-emitting unit corresponding to one anode; a cathode layer provided on a side of the light-emitting layer away from the anode layer; and a common layer provided between the anode layer and the light-emitting layer, or / and, the common layer provided between the cathode layer and the light-emitting layer; wherein the common layer includes a first common portion and a second common portion, the first common portion is provided corresponding to the light-emitting unit, the second common portion is provided between two adjacent light-emitting units, and the charge transfer rate of the second common portion is less than the charge transfer rate of the first common portion.

[0030] In one embodiment, the display panel further includes an auxiliary electrode disposed between two adjacent light-emitting units; wherein the orthographic projection of the second common portion on the auxiliary electrode is located within the auxiliary electrode, and one end of the second common portion is connected to the auxiliary electrode, and the other end of the second common portion is connected to the cathode layer.

[0031] In one embodiment, the auxiliary electrode includes a plurality of auxiliary wires, and the plurality of auxiliary wires are cross-arranged; wherein the orthographic projection of the light-emitting unit on the auxiliary electrode does not overlap with the auxiliary wires.

[0032] In one embodiment, the auxiliary conductive line includes a plurality of auxiliary sub-poles, and two adjacent auxiliary sub-poles are spaced apart from each other.

[0033] In one embodiment, the display panel includes a driving circuit layer located between the substrate and the light-emitting functional layer; the driving circuit layer includes a plurality of first thin film transistors and a plurality of second thin film transistors arranged at intervals, one first thin film transistor corresponding to one anode, and one second thin film transistor corresponding to one auxiliary sub-electrode; wherein the auxiliary sub-electrode is connected to the second thin film transistor.

[0034] In one embodiment, the light-emitting layer includes a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit; the auxiliary sub-pole is arranged between the green light-emitting unit and the blue light-emitting unit; and / or, the auxiliary sub-pole is arranged between the red light-emitting unit and the blue light-emitting unit; and / or, the auxiliary sub-pole is arranged between the red light-emitting unit and the green light-emitting unit.

[0035] In one embodiment, the auxiliary sub-pole includes a first auxiliary sub-pole and a second auxiliary sub-pole, the first auxiliary sub-pole is arranged around the blue light-emitting unit, and the second auxiliary sub-pole is arranged around the red light-emitting unit.

[0036] In one embodiment, the orthographic projection of the first auxiliary sub-pole on the substrate is a circular ring; the orthographic projection of the first auxiliary sub-pole on the substrate is a circular ring.

[0037] In one embodiment, the auxiliary electrode is a grid structure, and a plurality of auxiliary wires are arranged crosswise to form a plurality of holes, one hole corresponding to one light emitting unit.

[0038] In one embodiment, the display panel further includes a pixel definition layer, which is disposed between the anode layer and the cathode layer, and the pixel definition layer is provided with a plurality of first openings and a plurality of second openings, wherein the first openings are provided corresponding to the light-emitting units, and the second openings are provided corresponding to the auxiliary electrodes; wherein, one of the light-emitting units is provided in one of the first openings, at least part of the second common portion is provided in the second opening, and the second common portion is connected to the auxiliary electrode through the second opening.

[0039] In one embodiment, the display panel includes a first conductive layer, the first conductive layer includes the anode layer and the auxiliary electrode, the auxiliary electrode is spaced apart from and insulated from the anode; wherein the second opening is located on a side of the auxiliary electrode away from the substrate.

[0040] In one embodiment, the display panel includes a first conductive layer and a second conductive layer stacked together, the first conductive layer is arranged between the substrate and the pixel definition layer, and the second conductive layer is arranged on a side of the pixel definition layer away from the first conductive layer; wherein the first conductive layer includes the anode layer, the second conductive layer includes the auxiliary electrode, and the auxiliary electrode is arranged in the second opening.

[0041] In one embodiment, the light-emitting unit includes a first sub-light-emitting unit and a second sub-light-emitting unit that are stacked, and the common layer includes a first sub-common layer, a second sub-common layer, a third sub-common layer and a fourth sub-common layer; the first sub-common layer, the first sub-light-emitting unit, the second sub-common layer, the third sub-common layer, the second sub-light-emitting unit and the fourth sub-common layer are stacked in sequence on the substrate; wherein at least one of the first sub-common layer, the second sub-common layer, the third sub-common layer and the fourth sub-common layer is located between the auxiliary electrode and the cathode layer.

[0042] In one embodiment, the thickness of the auxiliary electrode is equal to the thickness of the anode.

[0043] The mobile terminal includes a terminal body and any one of the above-mentioned display panels, and the terminal body and the display panel are combined into one body.

[0044] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a display panel and a mobile terminal, wherein the display panel includes a substrate and a light-emitting functional layer arranged on the substrate, the light-emitting functional layer includes an anode layer, a light-emitting layer, a cathode layer and a common layer arranged in a stacked manner; the light-emitting layer includes a plurality of light-emitting units, the common layer is arranged between the anode layer and the light-emitting layer, or / and, the common layer is arranged between the cathode layer and the light-emitting layer; the common layer is arranged to include a first common part and a second common part, the first common part is arranged corresponding to the light-emitting unit, and the second common part is arranged between two adjacent light-emitting units, the charge transfer rate of the second common part is less than the charge transfer rate of the first common part, thereby reducing the charge transfer capacity of the common layer between the two adjacent light-emitting units, so as to avoid the current of the light-emitting unit being laterally transmitted to the adjacent light-emitting unit when emitting light, thereby improving the problem of lateral crosstalk in the display panel.

[0045] It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0046] Please refer to Figures 1 and 2; Figure 1 is a first top view schematic diagram of the display panel provided in an embodiment of the present application; Figure 2 is a first cross-sectional schematic diagram at AA' in Figure 1.

[0047] An embodiment of the present application provides a display panel 10 , which includes but is not limited to an organic light emitting diode (OLED) display panel. The display panel 10 includes an array substrate 11 and a light emitting functional layer 20 that are stacked.

[0048] The array substrate 11 includes a substrate 111 and a driving circuit layer 112 provided on the substrate 111; the substrate 111 may include a rigid substrate or a flexible substrate. When the substrate 111 is a rigid substrate, the material may be metal or glass. When the substrate 111 is a flexible substrate, the material may include at least one of acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, polyurethane resin, cellulose resin, silicone resin, polyimide resin, and polyamide resin. This embodiment does not impose any specific restrictions on this.

[0049] The driving circuit layer 112 includes a plurality of thin film transistors 1121 spaced apart from each other. The thin film transistors 1121 include conventional film layers such as an active layer 12, a gate insulating layer 13, a gate 14, an interlayer insulating layer 15, and a source / drain electrode layer 16 located on the substrate 111. This embodiment does not describe this in detail.

[0050] In some embodiments, the light-emitting functional layer 20 includes a stacked anode layer 211, a light-emitting layer 23, a cathode layer 24 and a common layer 22, the anode layer 211 is arranged on the array substrate 11, the anode layer 211 includes a plurality of separately arranged anodes 211A, the light-emitting layer 23 is arranged on the side of the anode layer 211 away from the substrate 111, the light-emitting layer 23 includes a plurality of light-emitting units 231, one light-emitting unit 231 corresponds to one anode 211A, the cathode layer 24 is arranged on the side of the light-emitting layer 23 away from the anode layer 211, the cathode layer 24 is arranged as a whole layer, the positive projection of the cathode layer 24 on the light-emitting layer 23 covers the light-emitting layer 23, the common layer 22 is arranged between the anode layer 211 and the light-emitting layer 23, or / and, the common layer 22 is arranged between the cathode layer 24 and the light-emitting layer 23.

[0051] Among them, the common layer 22 includes a first common portion 22A and a second common portion 22B, the first common portion 22A is arranged corresponding to the light-emitting unit 231, and the second common portion 22B is arranged between two adjacent light-emitting units 231, and the charge transfer rate of the second common portion 22B is lower than the charge transfer rate of the first common portion 22A; thereby reducing the charge transfer ability of the common layer 22 between the two adjacent light-emitting units 231, so as to avoid the current of the light-emitting unit 231 being horizontally transmitted to the adjacent light-emitting unit 231 when emitting light, thereby improving the problem of horizontal crosstalk existing in the display panel 10, so as to improve the display effect of the display panel 10.

[0052] Please continue to combine Figures 1 and 2. In some embodiments, the display panel 10 includes a first common layer 221 and a second common layer 222, the first common layer 221 is arranged between the anode layer 211 and the light-emitting layer 23, and the second common layer 222 is arranged between the cathode layer 24 and the light-emitting layer 23; wherein, the first common layer 221 includes a stacked hole injection layer and a hole transport layer, and the second common layer 222 includes a stacked electron transport layer and an electron injection layer, and the portion of the first common layer 221 located between two adjacent light-emitting units 231 and the portion of the second common layer 222 located between two adjacent light-emitting units 231 together constitute the second common portion 22B.

[0053] Specifically, the display panel 10 also includes an auxiliary electrode 181 arranged between two adjacent light-emitting units 231; wherein, the positive projection of the second common portion 22B on the auxiliary electrode 181 is located within the auxiliary electrode 181, and one end of the second common portion 22B is connected to the auxiliary electrode 181, and the other end of the second common portion 22B is connected to the cathode layer 24.

[0054] It can be understood that this embodiment provides an auxiliary electrode 181, and the positive projection of the second common portion 22B on the auxiliary electrode 181 is located within the auxiliary electrode 181, and one end of the second common portion 22B is connected to the auxiliary electrode 181, and the other end of the second common portion 22B is connected to the cathode layer 24. By applying a high voltage or a large current to the auxiliary electrode 181 and the cathode layer 24 on both sides of the second common portion 22B, at least part of the second common portion 22B is broken down by the high voltage or large current, thereby making the charge transfer rate of the second common portion 22B smaller than the charge transfer rate of the first common portion 22A, so as to avoid the current of the light-emitting unit 231 being horizontally transmitted to the adjacent light-emitting unit 231 when emitting light, thereby improving the problem of horizontal crosstalk existing in the display panel 10, so as to improve the display effect of the display panel 10.

[0055] It should be noted that, in another embodiment, the second common part 22B is completely broken down by a high voltage or a large current, that is, the lateral connection between the first common parts 22A is blocked, so that the light-emitting units 231 are independent of each other, further improving the problem of lateral crosstalk in the display panel 10; it can be understood that in this embodiment, the high voltage and the large current can be selected according to actual production conditions, and this embodiment does not impose specific restrictions on this.

[0056] Please continue to refer to Figure 1. In some embodiments, the auxiliary electrode 181 includes a plurality of auxiliary wires 181A, and the plurality of auxiliary wires 181A are cross-arranged; wherein, the orthographic projection of the light-emitting unit 231 on the auxiliary electrode 181 does not overlap with the auxiliary wire 181A; further, the auxiliary electrode 181 is a grid-like structure, and the plurality of auxiliary wires 181A are cross-arranged to form a plurality of holes 18A, one hole 18A corresponding to one light-emitting unit 231, and the orthographic projection of the light-emitting unit 231 on the auxiliary electrode 181 is located within the hole 18A, thereby avoiding the auxiliary electrode 181 from negatively affecting the performance of the first common portion 22A, thereby affecting the display effect of the display panel 10.

[0057] Please continue to refer to Figure 2. In some embodiments, the display panel 10 further includes a pixel definition layer 19A, which is disposed between the anode layer 211 and the cathode layer 24. The pixel definition layer 19A is provided with a plurality of first openings 191 and a plurality of second openings 192. The first openings 191 are provided corresponding to the light-emitting units 231, and the second openings 192 are provided corresponding to the auxiliary electrodes 181. wherein, one of the light-emitting units 231 is provided in one of the first openings 191, at least part of the second common portion 22B is provided in the second opening 192, and the second common portion 22B is connected to the auxiliary electrode 181 through the second opening 192.

[0058] Specifically, the pixel definition layer 19A is located on the side of the anode layer 211 away from the substrate 111, and the pixel definition layer 19A covers the anode 211A and the auxiliary electrode 181. The first opening 191 and the second opening 192 both penetrate the pixel definition layer 19A, wherein the first opening 191 exposes part of the anode 211A, the light-emitting unit 231 is connected to the anode 211A through the first opening 191, and the second opening 192 exposes part of the auxiliary electrode 181. One end of the second common layer 222 is connected to the cathode layer 24, and the other end of the second common layer 222 is connected to the auxiliary electrode 181 through the second opening 192, so that the second common layer 222 is sandwiched between the cathode layer 24 and the auxiliary electrode 181. By applying a high voltage or a large current to the auxiliary electrodes 181 and the cathode layer 24 on both sides of the second common portion 22B, at least part of the second common portion 22B is broken down by the high voltage or large current.

[0059] In some embodiments, the display panel 10 includes a first conductive layer 21, the first conductive layer 21 includes the anode layer 211 and the auxiliary electrode 181, the auxiliary electrode 181 is spaced apart and insulated from the anode 211A, and the second opening 192 is located on the side of the auxiliary electrode 181 away from the substrate 111; it can be understood that in this embodiment, the first conductive layer 21 is provided to include the anode layer 211 and the auxiliary electrode 181, so that the auxiliary electrode 181 and the anode 211A can be formed as one piece, thereby eliminating the need to additionally provide the auxiliary electrode 181, thereby reducing product costs and saving processes.

[0060] Specifically, the thickness of the auxiliary electrode 181 is equal to the thickness of the anode 211A, thereby avoiding thickness differences of the pixel definition layer 19A at different locations, thereby maintaining the flatness of the cathode layer 24 and ensuring the display effect of the display panel 10 .

[0061] It should be noted that, in this embodiment, the first conductive layer 21 includes the anode layer 211 and the auxiliary electrode 181 for illustration only, and this embodiment does not impose any specific restrictions on the position of the auxiliary electrode 181; for example, please refer to Figures 1 and 3; Figure 3 is a second cross-sectional schematic diagram of Figure 1 at AA`.

[0062] In some embodiments, the display panel 10 includes a first conductive layer 21 and a second conductive layer 18 stacked together, wherein the first conductive layer 21 is disposed between the substrate 111 and the pixel definition layer 19A, and the second conductive layer 18 is disposed on a side of the pixel definition layer 19A away from the first conductive layer 21; wherein the first conductive layer 21 includes the anode layer 211, and the second conductive layer 18 includes the auxiliary electrode 181, and the auxiliary electrode 181 and the anode 211A are in different layers and are insulated, thereby avoiding contact between the auxiliary electrode 181 and the anode 211A, which affects the luminous performance of the light-emitting unit 231; and the auxiliary electrode 181 is disposed in the second opening 192, which can improve the process accuracy and yield of the auxiliary electrode 181.

[0063] In some embodiments, the display panel 10 includes a connecting wire (not shown in the figure) and a first pin (not shown in the figure), the connecting wire is located between the auxiliary electrode 181 and the substrate 111, and the first pin is located in the binding area of ​​the display panel 10 (not shown in the figure); wherein, one end of the connecting wire is connected to the auxiliary electrode 181, and the other end of the connecting wire is connected to one end of the first pin, and is connected to the other end of the first pin through an external power supply device, thereby applying a high voltage or a large current to the auxiliary electrode 181; it can be understood that the auxiliary electrode 181 is an integrated structure formed by connecting multiple auxiliary wires 181A, so only one connecting wire and one first pin are required to apply a high voltage or a large current to the entire auxiliary electrode 181, thereby reducing production costs.

[0064] It should be noted that this embodiment does not impose any specific restrictions on the positions of the connecting wiring and the first pin, and connecting the first pin through an external power supply device to apply a high voltage or a large current to the auxiliary electrode 181 is only for illustration. This embodiment does not impose any specific restrictions on how to apply voltage or current to the auxiliary electrode 181; for example, please refer to Figures 1 and 4; Figure 4 is a third cross-sectional schematic diagram of Figure 1 at AA`.

[0065] In some embodiments, the display panel 10 also includes a flat layer 17 located between the driving circuit layer 112 and the light-emitting functional layer 20, and the driving circuit layer 112 includes a plurality of first thin film transistors 1121 and a second thin film transistor 1121 arranged at intervals, and the first thin film transistor 1121 is arranged corresponding to the anode 211A, and the second thin film transistor 1121 is arranged corresponding to the auxiliary electrode 181; wherein the auxiliary electrode 181 is connected to the second thin film transistor 1121.

[0066] Specifically, the first thin film transistor 1121 includes a first active layer 12, a gate insulating layer 13, a first gate electrode 14, an interlayer insulating layer 15 and a first source-drain electrode layer 16 that are stacked together, and the second thin film transistor 1121 includes a second active layer 12, a gate insulating layer 13, a second gate electrode 14, an interlayer insulating layer 15 and a second source-drain electrode layer 16; a plurality of first via holes 171 and a second via hole 172 are opened on the flat layer 17, and the first via holes 171 and the second via holes 172 both pass through the flat layer 17, and one first via hole 171 is set corresponding to one first thin film transistor 1121, and one second via hole 172 is set corresponding to one second thin film transistor 1121.

[0067] One side of the anode 211A is connected to the light-emitting unit 231, and the other side of the anode 211A is connected to the first source-drain layer 16 through the first via 171. One side of the auxiliary electrode 181 is connected to the second common portion 22B, and the other side of the auxiliary electrode 181 is connected to the second source-drain layer 16 through the second via 172. Thus, the light-emitting unit 231 is driven to emit light normally through the first thin-film transistor 1121, and a high voltage or a large current is provided to the auxiliary electrode 181 through the second thin-film transistor 1121, so that at least part of the second common portion 22B is broken down by the voltage or current, so that the charge transfer rate of the second common portion 22B is lower than the charge transfer rate of the first common portion 22A, thereby avoiding the current of the light-emitting unit 231 being horizontally transmitted to the adjacent light-emitting unit 231 when emitting light, thereby improving the problem of horizontal crosstalk existing in the display panel 10, so as to improve the display effect of the display panel 10.

[0068] Please refer to Figures 5 and 6; Figure 5 is a second schematic top view of the display panel provided in the embodiment of the present application; and Figure 6 is a first schematic cross-sectional view taken along line BB' of Figure 5 .

[0069] In some embodiments, the first conductive layer 21 includes the anode layer 211 and the auxiliary electrode 181, and the auxiliary electrode 181 is spaced apart and insulated from the anode 211A; wherein the auxiliary wire 181A includes a plurality of auxiliary sub-poles 181B, and two adjacent auxiliary sub-poles 181B are spaced apart from each other.

[0070] The light-emitting layer 23 includes but is not limited to a red light-emitting unit 231A, a green light-emitting unit 231C and a blue light-emitting unit 231B, and the auxiliary sub-pole 181B is arranged between the green light-emitting unit 231C and the blue light-emitting unit 231B; and / or, the auxiliary sub-pole 181B is arranged between the red light-emitting unit 231A and the blue light-emitting unit 231B; and / or, the auxiliary sub-pole 181B is arranged between the red light-emitting unit 231A and the green light-emitting unit 231C.

[0071] Specifically, the orthographic projection of the light-emitting unit 231 on the auxiliary electrode 181 does not overlap with the auxiliary sub-pole 181B, and the auxiliary sub-pole 181B is arranged between the green light-emitting unit 231C and the blue light-emitting unit 231B, between the red light-emitting unit 231A and the blue light-emitting unit 231B, and between the red light-emitting unit 231A and the green light-emitting unit 231C.

[0072] The common layer 22 includes a plurality of second common portions 22B, one second common portion 22B is provided corresponding to one auxiliary sub-pole 181B, and the plurality of auxiliary sub-poles 181B can be designed to have different shapes and sizes, which is not specifically limited in this embodiment.

[0073] In some embodiments, the driving circuit layer 112 includes a plurality of first thin film transistors 1121 and a plurality of second thin film transistors 1121 arranged at intervals, wherein one first thin film transistor 1121 is arranged corresponding to one anode 211A, and one second thin film transistor 1121 is arranged corresponding to one auxiliary sub-pole 181B; wherein the auxiliary sub-pole 181B is connected to the second thin film transistor 1121.

[0074] One side of the anode 211A is connected to the light-emitting unit 231, and the other side of the anode 211A is connected to the first source-drain layer 16 through the first via 171. One side of the auxiliary sub-pole 181B is connected to the second common portion 22B, and the other side of the auxiliary sub-pole 181B is connected to the second source-drain layer 16 through the second via 172; thereby, the light-emitting unit 231 is driven to emit light normally through the first thin-film transistor 1121, and the auxiliary sub-pole 181B is driven by the second thin-film transistor 1121 to provide high voltage or large current.

[0075] It should be noted that the first conductive layer 21 includes the anode layer 211 and the auxiliary electrode 181. The auxiliary electrode 181 is spaced apart from the anode 211A and the insulated arrangement is only for illustration. This embodiment does not impose any specific restrictions on the position of the auxiliary electrode 181. For example, in another embodiment, the display panel 10 further includes a first conductive layer 21 and a second conductive layer 18 stacked together. The first conductive layer 21 is provided between the substrate 111 and the pixel definition layer 19A, and the second conductive layer 18 is provided on a side of the pixel definition layer 19A away from the first conductive layer 21. ; wherein, the first conductive layer 21 includes the anode layer 211, and the second conductive layer 18 includes a plurality of auxiliary sub-poles 181B, and the auxiliary sub-poles 181B and the anode 211A are in different layers and insulated, thereby avoiding contact between the auxiliary sub-poles 181B and the anode 211A, which affects the light-emitting performance of the light-emitting unit 231; and the auxiliary sub-poles 181B are arranged in the second opening 192, thereby improving the process accuracy and yield of the auxiliary sub-poles 181B, and avoiding damage to the anode 211A during the process of the auxiliary sub-poles 181B.

[0076] Moreover, the auxiliary sub-pole 181B is arranged between the green light-emitting unit 231C and the blue light-emitting unit 231B, between the red light-emitting unit 231A and the blue light-emitting unit 231B, and between the red light-emitting unit 231A and the green light-emitting unit 231C, which is also only used for illustration; for example, please refer to Figure 7 for a third top view schematic diagram of the display panel provided in an embodiment of the present application.

[0077] In some embodiments, the auxiliary sub-pole 181B includes a first auxiliary sub-pole 181B1 and a second auxiliary sub-pole 181B2, the first auxiliary sub-pole 181B1 is arranged corresponding to the blue light-emitting unit 231B, and the second auxiliary sub-pole 181B2 is arranged corresponding to the red light-emitting unit 231A; specifically, the first auxiliary sub-pole 181B1 surrounds the blue light-emitting unit 231B, and the orthographic projection of the first auxiliary sub-pole 181B1 on the substrate 111 is a circular ring; the second auxiliary sub-pole 181B2 surrounds the red light-emitting unit 231A, and the orthographic projection of the first auxiliary sub-pole 181B1 on the substrate 111 is a circular ring.

[0078] It can be understood that, in this embodiment, by setting the first auxiliary sub-pole 181B1 around the blue light-emitting unit 231B, the second common portion 22B between the blue light-emitting unit 231B and the red light-emitting unit 231A, and the second common portion 22B between the blue light-emitting unit 231B and the green light-emitting unit 231C are broken down by voltage or current, so as to prevent the current of the blue light-emitting unit 231B from being laterally transmitted to the adjacent red light-emitting unit 231A or the green light-emitting unit 231C when emitting light; by setting the second auxiliary sub-pole 181B1 1B2 surrounds the red light-emitting unit 231A, so that the second common portion 22B located between the red light-emitting unit 231A and the blue light-emitting unit 231B, and the second common portion 22B located between the red light-emitting unit 231A and the green light-emitting unit 231C are broken down by voltage or current, so as to prevent the current of the red light-emitting unit 231A from being laterally transmitted to the adjacent blue light-emitting unit 231B or the green light-emitting unit 231C when emitting light, thereby improving the problem of lateral crosstalk existing in the display panel 10, so as to improve the display effect of the display panel 10.

[0079] Please refer to FIG. 1 and FIG. 8 ; FIG. 8 is a fourth cross-sectional schematic diagram of FIG. 1 at AA′.

[0080] In some embodiments, the light-emitting unit 231 includes a first sub-light-emitting unit 2311 and a second sub-light-emitting unit 2312, and the common layer 22 includes a first sub-common layer 221A, a second sub-common layer 221B, a third sub-common layer 221C and a fourth sub-common layer 221D; the first sub-common layer 221A, the first sub-light-emitting layer 23, the second sub-common layer 221B, the third sub-common layer 221C, the second sub-light-emitting layer 23 and the fourth sub-common layer 221D are stacked in sequence on the substrate 111; wherein, at least one of the first sub-common layer 221A, the second sub-common layer 221B, the third sub-common layer 221C and the fourth sub-common layer 221D is located between the auxiliary electrode 181 and the cathode layer 24.

[0081] Specifically, the first sub-common layer 221A includes a hole injection layer and a first hole transport layer arranged in stacked form, the second sub-common layer 221B includes a first electron transport layer, the third sub-common layer 221C includes a second hole transport layer, and the fourth sub-common layer 221D includes a second electron transport layer and an electron injection layer arranged in stacked form; wherein the portion of the first sub-common layer 221A located between two adjacent light-emitting units 231, the portion of the second sub-common layer 221B located between two adjacent light-emitting units 231, the portion of the third sub-common layer 221C located between two adjacent light-emitting units 231, and the portion of the fourth sub-common layer 221D located between two adjacent light-emitting units 231 together constitute the second common portion 22B.

[0082] The positive projection of the second common portion 22B on the auxiliary electrode 181 is located within the auxiliary electrode 181, and one end of the second common portion 22B is connected to the auxiliary electrode 181, and the other end of the second common portion 22B is connected to the cathode layer 24. A high voltage or a large current is applied to the auxiliary electrode 181 and the cathode layer 24 on both sides of the second common portion 22B, so that at least part of the second common portion 22B is broken down by the voltage or current, and the charge transfer rate of the second common portion 22B is smaller than the charge transfer rate of the first common portion 22A, so as to avoid the current of the light-emitting unit 231 being horizontally transmitted to the adjacent light-emitting unit 231 when emitting light, thereby improving the problem of horizontal crosstalk existing in the display panel 10 and improving the display effect of the display panel 10.

[0083] It should be noted that, in this embodiment, the common layer 22 also includes a charge generation layer, which is arranged in the second sub-common layer 221B and the third sub-common layer 221C; wherein, the charge generation layer includes an n-type charge generation layer and a p-type charge generation layer, and the n-type charge generation layer is arranged between the p-type charge generation layer and the second sub-common layer 221B; that is, the light-emitting functional layer 20 includes an anode 211A, a hole injection layer, a first hole transport layer, a first sub-light-emitting unit 2311, a first electron transport layer, an n-type charge generation layer, a p-type charge generation layer, a second hole transport layer, a second sub-light-emitting unit 2312, a second electron transport layer, an electron injection layer and a cathode layer 24, which are stacked in sequence; it can be understood that this embodiment only takes the above-mentioned film layer structure as an example, and this embodiment does not specifically limit the film layer structure of the light-emitting layer 23 and the common layer 22.

[0084] Specifically, please refer to Table 1, which shows the current density of the display panel 10 provided in the second common portion 22B of Example 1 of the present application, the current density of the display panel 10 provided in the second common portion 22B of Example 2, the current density of the display panel 10 provided in the second common portion 22B of Example 3, and the current density of the display panel 10 provided in the common portion between two adjacent light-emitting units 231 of Comparative Example 1.

[0085] Among them, in Example 1, Example 2, Example 3 and Comparative Example 1, the common part includes a stacked hole injection layer, a first hole transport layer, a first sub-light-emitting unit 2311, a first electron transport layer, an n-type charge generation layer, a p-type charge generation layer, a second hole transport layer, a second sub-light-emitting unit 2312, a second electron transport layer and an electron injection layer.

[0086] Specifically, before the current density test is performed on the display panel 10 of Example 1, 11V (volts) is applied to the auxiliary and cathode on both sides of the second common portion 22B thereof for a duration of 1.5 hours; when the current density test is performed on the display panel 10 of Example 2, 15V (volts) is applied to the auxiliary and cathode on both sides of the second common portion 22B thereof for a duration of 1.5 hours; when the current density test is performed on the display panel 10 of Example 1, 19V (volts) is applied to the auxiliary and cathode on both sides of the second common portion 22B thereof for a duration of 1.5 hours; and the common portion of the display panel 10 of Comparative Example 1 is not subjected to additional voltage application before the current density test is performed; please refer to Table 1 for details.

[0087]

[0088] Table 1

[0089] As can be seen from Table 1, in this embodiment, an auxiliary electrode 181 is provided, and the positive projection of the second common portion 22B on the auxiliary electrode 181 is located within the auxiliary electrode 181, and one end of the second common portion 22B is connected to the auxiliary electrode 181, and the other end of the second common portion 22B is connected to the cathode layer 24. A high voltage or a large current is applied to the auxiliary electrode 181 and the cathode layer 24 on both sides of the second common portion 22B, so that at least a portion of the second common portion 22B is broken down by the voltage or current, and the charge transfer rate of the second common portion 22B is smaller than the charge transfer rate of the first common portion 22A, so as to avoid the current of the light-emitting unit 231 being horizontally transmitted to the adjacent light-emitting unit 231 when emitting light, thereby improving the problem of horizontal crosstalk existing in the display panel 10 and improving the display effect of the display panel 10.

[0090] This embodiment provides a mobile terminal, which includes a terminal body and the display panel described in any one of the above embodiments, wherein the terminal body and the display panel are integrated into one.

[0091] It can be understood that the display panel has been described in detail in the above embodiments and will not be repeated here.

[0092] In specific applications, the mobile terminal can be the display screen of a smartphone, tablet computer, laptop computer, smart bracelet, smart watch, smart glasses, smart helmet, desktop computer, smart TV or digital camera, and can even be used on electronic devices with flexible display screens.

[0093] In summary, although the present application has been disclosed as above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims.

Claims

1. A display panel, wherein, It includes a substrate and a light-emitting functional layer provided on the substrate. The light-emitting functional layer includes: An anode layer provided on the substrate. The anode layer includes a plurality of anodes; A light-emitting layer provided on the side of the anode layer away from the substrate. The light-emitting layer includes a plurality of light-emitting units, and one light-emitting unit corresponds to one anode; A cathode layer provided on the side of the light-emitting layer away from the anode layer; and A common layer provided between the anode layer and the light-emitting layer, and / or, the common layer is provided between the cathode layer and the light-emitting layer; Wherein, the common layer includes a first common portion and a second common portion. The first common portion is provided corresponding to the light-emitting unit, and the second common portion is provided between two adjacent light-emitting units. The charge transfer rate of the second common portion is less than that of the first common portion.

2. The display panel according to claim 1, wherein The display panel further includes an auxiliary electrode provided between two adjacent light-emitting units; Wherein, the orthographic projection of the second common portion on the auxiliary electrode is located within the auxiliary electrode, and one end of the second common portion is connected to the auxiliary electrode, and the other end of the second common portion is connected to the cathode layer.

3. The display panel according to claim 2, wherein, The auxiliary electrode includes a plurality of auxiliary wires, and the plurality of auxiliary wires are arranged in a crosswise manner; Wherein, the orthographic projection of the light-emitting unit on the auxiliary electrode does not overlap with the auxiliary wire.

4. The display panel according to claim 3, wherein, The auxiliary wire includes a plurality of auxiliary sub-electrodes, and two adjacent auxiliary sub-electrodes are spaced apart from each other.

5. The display panel according to claim 4, wherein, The display panel includes a driving circuit layer located between the substrate and the light-emitting functional layer; The driving circuit layer includes a plurality of first thin-film transistors and a plurality of second thin-film transistors arranged at intervals. One first thin-film transistor corresponds to one anode, and one second thin-film transistor corresponds to one auxiliary sub-electrode; Wherein, the auxiliary sub-electrode is connected to the second thin-film transistor.

6. The display panel according to claim 4, wherein, The light-emitting layer includes a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit; The auxiliary sub-electrode is provided between the green light-emitting unit and the blue light-emitting unit; and / or, the auxiliary sub-electrode is provided between the red light-emitting unit and the blue light-emitting unit; and / or, the auxiliary sub-electrode is provided between the red light-emitting unit and the green light-emitting unit.

7. The display panel according to claim 6, wherein, The auxiliary sub-electrode includes a first auxiliary sub-electrode and a second auxiliary sub-electrode. The first auxiliary sub-electrode is arranged around the blue light-emitting unit, and the second auxiliary sub-electrode is arranged around the red light-emitting unit.

8. The display panel according to claim 7, wherein, The orthographic projection of the first auxiliary sub-electrode on the substrate is in a circular ring shape; the orthographic projection of the first auxiliary sub-electrode on the substrate is in a circular ring shape.

9. The display panel according to claim 3, wherein, The auxiliary electrode is in a grid-like structure, and the plurality of auxiliary wires are arranged in a crosswise manner to form a plurality of holes, and one hole corresponds to one light-emitting unit.

10. The display panel according to claim 2, wherein, The display panel further includes a pixel definition layer provided between the anode layer and the cathode layer. A plurality of first openings and a plurality of second openings are formed on the pixel definition layer. The first openings correspond to the light-emitting units, and the second openings correspond to the auxiliary electrodes; Wherein, one of the light-emitting units is disposed in one of the first openings, at least a part of the second common portion is disposed in the second opening, and the second common portion is connected to the auxiliary electrode through the second opening.

11. The display panel according to claim 10, wherein, The display panel includes a first conductive layer, the first conductive layer includes the anode layer and the auxiliary electrode, and the auxiliary electrode is spaced apart from and insulated from the anode. Wherein, the second opening is located on a side of the auxiliary electrode away from the substrate.

12. The display panel according to claim 10, wherein, The display panel includes a first conductive layer and a second conductive layer which are stacked, the first conductive layer is disposed between the substrate and the pixel definition layer, and the second conductive layer is disposed on a side of the pixel definition layer away from the first conductive layer. Wherein, the first conductive layer includes the anode layer, the second conductive layer includes the auxiliary electrode, and the auxiliary electrode is disposed in the second opening.

13. The display panel according to claim 2, wherein, The light-emitting unit includes a first sub-light-emitting unit and a second sub-light-emitting unit which are stacked, and the common layer includes a first sub-common layer, a second sub-common layer, a third sub-common layer, and a fourth sub-common layer. The first sub-common layer, the first sub-light-emitting unit, the second sub-common layer, the third sub-common layer, the second sub-light-emitting unit, and the fourth sub-common layer are sequentially stacked on the substrate. Wherein, at least one of the first sub-common layer, the second sub-common layer, the third sub-common layer, and the fourth sub-common layer is located between the auxiliary electrode and the cathode layer.

14. The display panel according to claim 2, wherein, The thickness of the auxiliary electrode is equal to the thickness of the anode.

15. A mobile terminal, wherein, It includes a terminal body and a display panel, the terminal body and the display panel are combined into one body, the display panel includes a substrate and a light-emitting functional layer disposed on the substrate, and the light-emitting functional layer includes: An anode layer, which is disposed on the substrate, and the anode layer includes a plurality of anodes. A light-emitting layer, which is disposed on a side of the anode layer away from the substrate, the light-emitting layer includes a plurality of light-emitting units, and one light-emitting unit corresponds to one anode. A cathode layer, which is disposed on a side of the light-emitting layer away from the anode layer; and A common layer, which is disposed between the anode layer and the light-emitting layer, or / and, the common layer is disposed between the cathode layer and the light-emitting layer. Wherein, the common layer includes a first common portion and a second common portion, the first common portion is disposed corresponding to the light-emitting unit, the second common portion is disposed between two adjacent light-emitting units, and the charge transfer rate of the second common portion is less than the charge transfer rate of the first common portion.

16. The mobile terminal according to claim 15, wherein, The display panel further includes an auxiliary electrode disposed between two adjacent light-emitting units. Wherein, a positive projection of the second common portion on the auxiliary electrode is located within the auxiliary electrode, one end of the second common portion is connected to the auxiliary electrode, and the other end of the second common portion is connected to the cathode layer.

17. The mobile terminal according to claim 16, wherein, The auxiliary electrode includes a plurality of auxiliary wires, and the plurality of auxiliary wires are cross-set. Wherein, a positive projection of the light-emitting unit on the auxiliary electrode does not overlap with the auxiliary wire.

18. The display panel according to claim 17, wherein, The auxiliary wire includes a plurality of auxiliary sub-poles, and two adjacent auxiliary sub-poles are spaced apart from each other.

19. The mobile terminal according to claim 18, wherein, The display panel includes a driving circuit layer located between the substrate and the light-emitting functional layer; The driving circuit layer includes a plurality of first thin-film transistors and a plurality of second thin-film transistors arranged at intervals. One of the first thin-film transistors is arranged corresponding to one of the anodes, and one of the second thin-film transistors is arranged corresponding to one of the auxiliary sub-electrodes; Wherein, the auxiliary sub-electrode is connected to the second thin-film transistor.

20. The mobile terminal according to claim 16, wherein, The display panel further includes a pixel definition layer, which is disposed between the anode layer and the cathode layer. A plurality of first openings and a plurality of second openings are formed in the pixel definition layer. The first openings are arranged corresponding to the light-emitting units, and the second openings are arranged corresponding to the auxiliary electrodes; Wherein, one of the light-emitting units is disposed in one of the first openings, at least a part of the second common part is disposed in the second opening, and the second common part is connected to the auxiliary electrode through the second opening.

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