Display panel, method for manufacturing display panel, and display device

Abstract

The present application provides a display panel, a method for manufacturing a display panel, and a display device. The display panel includes a substrate, a shielding layer, an organic common layer, and a light-emitting layer. The substrate has a pixel area and a non-pixel area. The shielding layer is located on one side of the substrate for shielding laser light. The shielding layer has a first through hole in the non-pixel area. The organic common layer is located on the side of the shielding layer away from the substrate. The organic common layer has a second through hole in the non-pixel area, which can cut off the transmission path of the leakage current in the organic common layer, effectively reduce the leakage current, and suppress the pixel stealing phenomenon of unlit pixels. Laser is used to irradiate from the side of the substrate away from the shielding layer to form a second through hole in the organic common layer. The projection of the second through hole on the shielding layer along the display direction of the display panel coincides with the first through hole. Multiple second through holes are formed quickly and accurately in the organic common layer, which takes a short time and can use a fast and efficient process to reduce leakage current and suppress the pixel stealing phenomenon of the device.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel, a method for manufacturing a display panel, and a display device. Background Art

[0002] An organic light-emitting diode (OLED) is a current-type organic light-emitting device. The principle of OLED light emission is that under the action of an electric field, holes from the anode and electrons from the cathode migrate to the light-emitting layer. There, the holes and electrons combine to form energy excitons, which excite the light-emitting molecules and ultimately emit light. Display panels that use organic light-emitting diodes for light are called OLED display panels. OLED display panels have pixel areas and non-pixel areas, with organic light-emitting diodes installed in the pixel areas of the OLED display panel.

[0003] However, in the prior art, when an OLED display panel displays an image, if part of the pixel areas in the display panel are lit, a strong leakage current will be generated between the pixel areas in the lit state and the adjacent pixel areas that should not be lit, causing the pixel areas that should not be lit to glow slightly, that is, the pixel stealing phenomenon occurs, which reduces the display effect of the display panel. Summary of the Invention

[0004] In view of this, the purpose of the present application is to provide a display panel, a method for manufacturing a display panel, and a display device, which can improve the pixel stealing phenomenon and enhance the display effect of the display panel.

[0005] An embodiment of the present application provides a display panel, comprising:

[0006] A substrate having a pixel area and a non-pixel area;

[0007] a shielding layer, located on one side of the substrate, the shielding layer being used to shield laser light, and the shielding layer having a first through hole in the non-pixel area;

[0008] an organic common layer located on a side of the shielding layer facing away from the substrate, the organic common layer having a second through hole in the non-pixel area; a projection of the second through hole on the shielding layer along the display direction of the display panel coincides with the first through hole; the organic common layer comprises two carrier transport layers stacked in sequence;

[0009] The light-emitting layer is located between the two carrier transport layers and in the pixel area.

[0010] An embodiment of the present application provides a method for manufacturing a display panel, comprising:

[0011] Providing a substrate, wherein the substrate has a pixel area and a non-pixel area;

[0012] forming a shielding layer on one side of the substrate, the shielding layer being used to shield laser light, the shielding layer having a first through hole in the non-pixel area;

[0013] An organic common layer and a light-emitting layer are formed on a side of the shielding layer facing away from the substrate, wherein the organic common layer includes two carrier transport layers stacked in sequence; the light-emitting layer is located between the two carrier transport layers and in the pixel area;

[0014] With the shielding layer as a shield, laser is used to irradiate from the side of the substrate away from the shielding layer to form a second through hole in the organic common layer, wherein the projection of the second through hole on the shielding layer along the display direction of the display panel coincides with the first through hole.

[0015] An embodiment of the present application provides a display device, including the display panel.

[0016] An embodiment of the present application provides a display panel, a method for manufacturing a display panel, and a display device. The display panel includes a substrate, a shielding layer, an organic common layer, and a light-emitting layer. The substrate has a pixel area and a non-pixel area. The shielding layer is located on one side of the substrate for shielding laser light. The shielding layer has a first through hole in the non-pixel area. The organic common layer is located on the side of the shielding layer away from the substrate, including two carrier transport layers stacked in sequence. A light-emitting layer is arranged between the two carrier transport layers in the pixel area. In the prior art, the organic common layer connects the pixel area and the non-pixel area of ​​the display panel, and the display panel is prone to generate a large leakage current. In an embodiment of the present application, the organic common layer has a second through hole in the non-pixel area, so that the organic common layer located in the non-pixel area is disconnected at the second through hole, which can cut off the transmission path of the leakage current in the organic common layer, effectively reduce the leakage current, suppress the pixel stealing phenomenon of unlit pixels, and improve the display effect of the display panel. In addition, a shielding layer having a first through hole can be used to shield laser light. Laser light is irradiated from the side of the substrate away from the shielding layer to form a second through hole in the organic common layer. The projection of the second through hole on the shielding layer along the display direction of the display panel coincides with the first through hole. In this way, multiple second through holes can be formed in the organic common layer quickly and accurately, which takes less time and can improve production capacity. Fast and efficient processes can be used to reduce device leakage current and suppress the pixel stealing phenomenon of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of a display panel provided in an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram of the pixel layout of a display panel provided in an embodiment of the present application is shown;

[0020] Figure 3 A schematic diagram of a pixel layout of another display panel provided in an embodiment of the present application is shown;

[0021] Figure 4 A schematic diagram of a pixel layout of another display panel provided in an embodiment of the present application is shown;

[0022] Figure 5 A schematic structural diagram of a shielding layer provided in an embodiment of the present application is shown;

[0023] Figure 6 A schematic structural diagram of another shielding layer provided in an embodiment of the present application is shown;

[0024] Figure 7 A schematic structural diagram of another display panel provided in an embodiment of the present application is shown;

[0025] Figure 8 A schematic structural diagram of another display panel provided in an embodiment of the present application is shown;

[0026] Figure 9 A schematic diagram of cathode voltage variation provided by an embodiment of the present application is shown;

[0027] Figure 10 A schematic diagram showing the distribution of a first electrode and an auxiliary electrode provided in an embodiment of the present application is shown;

[0028] Figure 11 A schematic structural diagram of another display panel provided in an embodiment of the present application is shown;

[0029] Figure 12 A schematic structural diagram of another display panel provided in an embodiment of the present application is shown;

[0030] Figure 13 A schematic structural diagram of another display panel provided in an embodiment of the present application is shown;

[0031] Figure 14 A schematic structural diagram of an OLED provided in an embodiment of the present application is shown;

[0032] Figure 15 A schematic diagram of a model of a traditional OLED and a tandem OLED provided in an embodiment of the present application is shown;

[0033] Figure 16 A schematic structural diagram of a Tandem OLED display panel provided in an embodiment of the present application is shown;

[0034] Figure 17 A flow chart showing a method for manufacturing a display panel provided in an embodiment of the present application is shown;

[0035] Figure 18 It is shown that an embodiment of the present application also provides a display device. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0038] Secondly, this application is described in detail with reference to schematic diagrams. When describing the embodiments of this application, for ease of explanation, cross-sectional views of device structures may be partially enlarged and not to scale. Furthermore, these schematic diagrams are merely illustrative and should not limit the scope of protection of this application. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0039] As described in the background technology, if part of the pixel area in the display panel is lit, a strong leakage current will be generated between the pixel area in the lit state and the adjacent pixel area that should not be lit. The leakage current is transmitted to a distant place through the carrier transport layer, causing the pixel area that should not be lit to glow slightly, that is, the pixel stealing phenomenon occurs, which reduces the display effect of the display panel.

[0040] Based on the above technical problems, the embodiments of the present application provide a display panel, a method for manufacturing a display panel, and a display device. The display panel includes a substrate, a shielding layer, an organic common layer, and a light-emitting layer. The substrate has a pixel area and a non-pixel area. The shielding layer is located on one side of the substrate for shielding laser. The shielding layer has a first through hole in the non-pixel area. The organic common layer is located on the side of the shielding layer away from the substrate, including two carrier transport layers stacked in sequence. A light-emitting layer is arranged between the two carrier transport layers in the pixel area. In the prior art, the organic common layer connects the pixel area and the non-pixel area of ​​the display panel, and the display panel is prone to generate a large leakage current. In the embodiments of the present application, the organic common layer has a second through hole in the non-pixel area, so that the organic common layer located in the non-pixel area is disconnected at the second through hole, which can cut off the transmission path of the leakage current in the organic common layer, effectively reduce the leakage current, suppress the pixel stealing phenomenon of unlit pixels, and improve the display effect of the display panel. In addition, a shielding layer having a first through hole can be used to shield laser light. Laser light is irradiated from the side of the substrate away from the shielding layer to form a second through hole in the organic common layer. The projection of the second through hole on the shielding layer along the display direction of the display panel coincides with the first through hole. In this way, multiple second through holes can be formed in the organic common layer quickly and accurately, which takes less time and can improve production capacity. Fast and efficient processes can be used to reduce device leakage current and suppress the pixel stealing phenomenon of the device.

[0041] In order to better understand the technical solutions and technical effects of the present application, specific embodiments will be described in detail below with reference to the accompanying drawings.

[0042] refer to Figure 1 FIG. 1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application. The display panel includes a substrate 101, a shielding layer 102, an organic common layer 103, and a light-emitting layer 104. The shielding layer 102 is located on one side of the substrate 101, and the organic common layer 103 is located on the side of the shielding layer 102 facing away from the substrate 101. The substrate 101 has pixel areas and non-pixel areas arranged in an array. The pixel areas of the substrate 101 are used to set the OLED structure for light emission, and the non-pixel areas are located between two adjacent pixel areas.

[0043] The substrate 101 may include a first polyimide (PI) layer, a first isolation layer, a second PI layer, and a second isolation layer stacked in sequence. The first PI layer is located on a side of the second PI layer away from the thin film transistor. The isolation layer may be made of polysilicon.

[0044] The organic common layer 103 is located on one side of the substrate 101 and includes two carrier transport layers stacked in sequence. The two carrier transport layers include an electron transport layer 1031 and a hole transport layer 1032. The light-emitting layer 104 is located between the two carrier transport layers and is located in the pixel area. Different materials of the light-emitting layer 104 can be used to emit light of different colors, so that the light-emitting device to which the light-emitting layer belongs serves as a sub-pixel of different colors. A pixel unit can include multiple sub-pixels, for example, three sub-pixels of red (Red, R), green (Green, G), and blue (Blue, B). The light-emitting device in each pixel area serves as a sub-pixel, and multiple sub-pixels can share the same film layers such as the hole transport layer 1032 and the electron transport layer 1031. This results in leakage current between different sub-pixels through the hole transport layer and the electron transport layer. The leakage current is transmitted to the light-emitting layer 104 of the adjacent sub-pixel, causing the adjacent sub-pixel that should not emit light to emit light, that is, a pixel stealing phenomenon occurs, which reduces the display effect of the display panel. For example, when controlling the B sub-pixel to emit light, the leakage current is transmitted to the G sub-pixel adjacent to the B sub-pixel through the hole transport layer and the electron transport layer, causing the G sub-pixel to light up, resulting in a pixel stealing phenomenon.

[0045] In the prior art, the organic common layer 103 connects the pixel area and non-pixel area of ​​the display panel, which easily generates a large leakage current in the display panel, causing the adjacent pixel area that should not be illuminated to glow slightly, resulting in a phenomenon of pixel stealing, which reduces the display effect of the display panel. In the present application, the organic common layer 103 has a second through hole 106 in the non-pixel area, so that the organic common layer 103 in the non-pixel area is disconnected at the second through hole 106, which can cut off the transmission path of the leakage current in the organic common layer 103, effectively reducing the leakage current, suppressing the pixel stealing phenomenon of unlit pixels, and improving the display effect of the display panel.

[0046] Specifically, the second through hole 106 may be located at the center of a pixel unit including a plurality of sub-pixels. Figure 2 As shown, it is a schematic diagram of the pixel layout of the display panel provided in an embodiment of the present application. Four pixel units are arranged on the display panel, and each pixel unit includes three sub-pixels, namely R, G, and B. The second through hole 106 can be arranged at the center position of the three sub-pixels R, G, and B to isolate different sub-pixels. In the plane perpendicular to the display direction of the display panel, the second through hole 106 is circular or polygonal.

[0047] Specifically, the second through hole 106 can also be located between two adjacent sub-pixels, and the extension direction is perpendicular to the line connecting the two adjacent sub-pixels, so as to isolate the two adjacent sub-pixels. Figure 3As shown, it is a schematic diagram of the pixel layout of another display panel provided in an embodiment of the present application, wherein in a plane perpendicular to the display direction of the display panel, the second through hole 106 is in the shape of a long strip, and the through holes located between different sub-pixels can be connected in a plane perpendicular to the display direction of the display panel, or can be independent of each other.

[0048] In order to cut off the leakage current transmission path between each sub-pixel, a second through hole 106 can be set between all adjacent sub-pixels on the display panel, which can greatly suppress the pixel stealing phenomenon and improve the display effect of the display panel. Figure 4 As shown, a schematic diagram of the pixel layout of another display panel provided in an embodiment of the present application shows that second through holes 106 are provided around each sub-pixel, and the second through holes 106 are in the shape of long strips to cut off the leakage current transmission path between adjacent pixels.

[0049] A shielding layer 102 may be provided between the substrate 101 and the organic common layer 103 to shield laser light. The shielding layer 102 has a first through hole 105 in the non-pixel region, and a second through hole 106, whose projection onto the shielding layer 102 along the display direction of the display panel coincides with the first through hole 105. The shielding layer may be a back side metal film (BSM), made of metal, and may isolate the substrate from the device structure thereon, thereby reducing the substrate's impact on the device structure.

[0050] When a laser is used to irradiate from the side of the substrate 101 away from the shielding layer 102, the shielding layer 102 can shield the laser. The laser is irradiated to the organic common layer 103 through the first through hole 105 of the shielding layer 102. The organic common layer 103 absorbs the laser and is dissolved to form a second through hole 106. In this way, the second through hole 106 is formed by irradiating the organic common layer 103 with the laser through the first through hole 105 of the shielding layer 102. By using the shielding layer 102 with the first through hole 105, the display panel is scanned across the entire surface to form the second through hole 106 in the organic common layer 103. For example, a line scanning laser source is used to scan the entire surface. Compared with the method of using a point laser source to form the second through holes 106 in sequence, the present application can form multiple second through holes 106 in the organic common layer 103 at one time, which takes less time, can improve production capacity, can quickly and efficiently reduce leakage current, and suppress the pixel stealing phenomenon.

[0051] Specifically, when the second through hole 106 is located at the center of a pixel unit including a plurality of sub-pixels, the first through hole 105 is also located at the center of the pixel unit including a plurality of sub-pixels; when the second through hole 106 is located between two adjacent sub-pixels and its extension direction is perpendicular to the line connecting the two adjacent sub-pixels, the first through hole 105 is also located between them and its extension direction is perpendicular to the line connecting the two adjacent sub-pixels. Figure 5 As shown in FIG. 1 , a schematic diagram of the structure of a shielding layer provided in an embodiment of the present application is provided. The shielding layer 102 has two first through holes 105. The shape of the first through holes 105 is a long strip. The shielding layer 102 is used as a shielding layer to form Figure 3 The second through hole 106 shown. The first through hole 105 can be set between all adjacent sub-pixels on the display panel, which can greatly suppress the pixel stealing phenomenon and improve the display effect of the display panel. Figure 6 As shown in FIG. 1 , a schematic diagram of the structure of another shielding layer provided in an embodiment of the present application is provided. A first through hole 105 is provided around each sub-pixel. The first through hole 105 is in the shape of a long strip. By using the shielding layer 102 as a blocking layer, a Figure 4 The second through hole 106 is shown.

[0052] refer to Figure 7 As shown, it is a structural schematic diagram of another display panel provided in an embodiment of the present application. The display panel may also include a first electrode 107, a second electrode 108 and a pixel definition layer 109. The first electrode 107 is located on the side of the organic common layer 103 away from the substrate 101. The first electrode 107 can be a cathode. The second electrode 108 is located between the shielding layer 102 and the pixel definition layer 109 and is located in the pixel area. The second electrode 108 can be an anode. The pixel definition layer 109 is located between the shielding layer 102 and the organic common layer 103 and is used to define the pixel area and the non-pixel area, wherein the pixel definition layer 109 is formed in the non-pixel area, and the pixel definition layer in the pixel area is etched to form a groove. The first groove is the formation area of ​​the pixel unit, and the organic common layer 103 and the light-emitting layer 104 in the pixel unit can be formed in the groove.

[0053] Furthermore, the pixel definition layer 109 has a first groove 110 in the non-pixel region. The projection of the second through hole 106 onto the pixel definition layer 109 along the display direction of the display panel can be within the first groove 110. This not only cuts off the transmission path of leakage current in the organic common layer 103, but also cuts off the transmission path within the pixel definition layer 109, thereby minimizing leakage current, enhancing the suppression of pixel stealing, and achieving isolation between different pixels. The projection of the second through hole 106 onto the pixel definition layer 109 along the display direction of the display panel can cover, completely overlap, or partially overlap the area where the first groove 110 is located.

[0054] It can be understood that after the second through hole 106 is provided in the organic common layer 103 and the pixel definition layer 109 has the first groove 110, the portion of the first electrode 107 within the first groove 110 extends along the side wall and bottom surface of the first groove 110, and can also extend along the side wall of the second through hole 106, thereby forming a continuous first electrode 107. The first groove 110 and the portion of the first electrode 107 on the side wall of the second through hole 106 are conducive to further isolating different pixels.

[0055] The first groove 110 may penetrate the entire pixel definition layer 109 or may penetrate a portion of the pixel definition layer 109, which is not specifically limited herein. Figure 7 The first groove 110 penetrates a portion of the pixel definition layer 109 . The deeper the first groove 110 is, the better the isolation effect for different pixels is.

[0056] In the embodiment of the present application, the display panel may further include a flat layer 111 located between the shielding layer 102 and the pixel definition layer 109. The flat layer 111 located in the non-pixel area is provided with a second groove 112. When the first groove 110 passes through the pixel definition layer 109, the first groove 110 and the second groove 112 are connected. This can cut off the transmission path of the leakage current in the flat layer 111, further reduce the leakage current, and suppress the pixel stealing phenomenon. Figure 8 , which is a schematic structural diagram of another display panel provided in an embodiment of the present application, the display panel further includes a planar layer 111 , and the second groove 112 is located in the planar layer 111 in the non-pixel area.

[0057] In a plane perpendicular to the display direction of the display panel, the size of the second groove 112 can be smaller than that of the first groove 110. This makes it easier to implement during the manufacturing process, reduces the process difficulty, and improves process efficiency. Specifically, in a plane perpendicular to the display direction of the display panel, if the second groove 112 is circular, the groove size can be the diameter of the circle, that is, the diameter of the second groove 112 is smaller than the diameter of the first groove 110. If the second groove 112 is polygonal, the groove size can also be the groove side length, that is, the side length of the second groove 112 is smaller than the side length of the first groove 110.

[0058] Specifically, the first groove 110 and the second groove 112 may be strip-shaped in a plane perpendicular to the display direction of the display panel, and the extension direction of the first groove 110 and the second groove 112 is perpendicular to the line connecting the pixel areas on both sides of the first groove 110. When the projections of the first groove 110 and the second through hole 106 in the pixel definition layer 109 and the flat layer 111 coincide with the first groove 110 and the second groove 112, respectively, the shape of the second through hole 106 is strip-shaped, and the extension direction of the second through hole 106 is perpendicular to the line connecting the pixel areas, reference Figure 4As shown, the first groove 110 and the second groove 112 are also strip-shaped, and the extending direction of the first groove 110 and the second groove 112 is perpendicular to the line connecting the pixel areas on both sides of the first groove 110 .

[0059] In addition, the number of the first grooves 110 and the second grooves 112 can be set to be multiple, and the number of the first grooves 110 is equal to the number of the second grooves 112. By setting multiple grooves in the non-pixel area between adjacent pixel areas, the transmission path of the leakage current can be cut off multiple times, thereby reducing the leakage current to the greatest extent and suppressing pixel stealing. For example, the number of the first grooves 110 and the second grooves 112 is 2, which further reduces the leakage current.

[0060] The first electrode 107 generally covers the entire surface of the organic common layer 103. A cathode voltage is connected to one end of the first electrode 107. As the first electrode 107 extends within the plane, the cathode voltage decreases as the resistance of the first electrode 107 increases. This reduces the voltage difference between the anode and cathode of the OLED, resulting in a weaker brightness of the OLED farther from the cathode voltage connection end. This leads to uneven brightness of the OLED at different locations, thus affecting the uniformity of the display. Figure 9 As shown, it is a schematic diagram of the voltage change of the cathode provided in an embodiment of the present application. The cathode voltage is input to the first cathode 107 through the two black pins of the first electrode 107. The color changes from light to dark, indicating that the absolute value of the voltage changes from small to large. The voltage range can be -2V to -3V. As the cathode extends in the plane away from the pin, the cathode voltage gradually decreases, and the voltage difference between the cathode and the anode changes, resulting in a change in brightness, which affects the uniformity of the display.

[0061] In an embodiment of the present application, the display panel may further include an auxiliary electrode, the auxiliary electrode having a small square resistance. By setting the auxiliary electrode in parallel with part of the first electrode 107, the overall resistance of the electrode structure formed by the auxiliary electrode and the first electrode 107 is reduced, and the voltage drop of the first electrode 107 is compensated, so that the cathode voltage of the OLED far away from the cathode voltage signal input terminal does not change much, the cathode impedance is reduced, the drop amplitude of the cathode voltage is reduced, and the display uniformity is improved. The auxiliary electrode can be located on the side of the pixel definition layer 109 away from the first electrode 107, and the auxiliary electrode is in contact with the first electrode 107 located at the bottom of the first groove 110. The cathode voltage signal output by the integrated circuit (IC) can be transmitted to the far end of the panel through the first electrode 107 and the auxiliary electrode at the same time. The auxiliary electrode has a small square resistance and a correspondingly small voltage drop. Reference Figure 10As shown, a distribution diagram of a first electrode 107 and an auxiliary electrode provided in an embodiment of the present application is provided. A cathode voltage signal is input to one end of the first electrode 107 through an IC circuit, and the auxiliary electrode is connected to a portion of the first electrode 107 in the first groove 110. The cathode voltage is transmitted to the far end of the panel through the first electrode 107 and the auxiliary electrode, which can slow down the decrease in the cathode voltage.

[0062] In the embodiment of the present application, the auxiliary electrode may include a first portion 113 located in the same layer as the second electrode 108. Thus, when the second electrode 108 is formed, the first portion 113 located in the same layer as the second electrode 108 may be formed. By using the first portion 113 as the auxiliary electrode, the decrease in cathode voltage may be reduced, the process flow may be simplified, and the process efficiency may be improved. Figure 11 , which is a schematic structural diagram of another display panel provided in an embodiment of the present application, the auxiliary electrode includes a first portion 113 , wherein the auxiliary electrode may be located above the planar layer 111 .

[0063] In an embodiment of the present application, the display panel may further include a third electrode 114 and a thin film transistor. The thin film transistor is located between the second electrode 108 and the shielding layer 102, and is used to control the power supply of the second electrode 108, thereby controlling the display of the OLED. The thin film transistor includes a source region, a drain region and a gate 115. The source region is used to connect the source line, the drain region is used to connect the second electrode 108, and the gate 115 is used to control the conduction or cutoff between the source region and the drain region.

[0064] refer to Figure 12FIG. 1 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application. The display panel further includes a third electrode 114 and a thin film transistor. The thin film transistor includes a gate 115 and an active layer 116. A gate dielectric layer 117 is provided between the gate 115 and the active layer 116. A portion of the first active layer located at the projection position of the gate 115 on the first active layer serves as a channel region. The channel region is flanked by source and drain regions. The source and drain regions may include a source region located on one side of the first channel region and a drain region located on the other side of the channel region. The source region may be connected to a source line 118, and the drain region may be connected to the second electrode 108 via the third electrode 114, thereby outputting an anode voltage to the second electrode 108. The material of the active layer may be indium gallium zinc oxide (IGZO), the material of the gate dielectric layer may be silicon oxide, and the material of the gate 115 may be copper or aluminum. The active layer may be obtained through deposition and etching processes. The source and drain regions may be conductively treated or may be additionally provided with a conductor structure connected to the active layer. The conductive treatment of IGZO can be performed by doping the IGZO, such as ion implantation of silicon IGZO, or by irradiating the IGZO with UV light or near-UV light. The thin film transistor can also include an auxiliary gate, with a capacitor layer 119 between the auxiliary gate and the gate 115. An isolation layer 120 can be provided above the auxiliary electrode to isolate the auxiliary electrode from other film layers. A buffer layer 121 can be provided between the gate dielectric layer 117 and the shielding layer 102.

[0065] The third electrode 114 is used to connect the second electrode 108 and the drain region. The third electrode 114 is located in the pixel region and between the second electrode 108 and the shielding layer 102. It is connected to the second electrode 108 via a first connection structure 122. The second portion 123 can be formed at the same time as the auxiliary electrode. The auxiliary electrode can also include the second portion 123 located on the same layer as the third electrode 114. The first portion 113 and the second portion 123 are connected via the second connection structure 124, which can further improve display uniformity.

[0066] In an embodiment of the present application, the display panel may further include a fourth electrode 125 located in the pixel region and used to connect the third electrode 114 and the drain region. The fourth electrode 125 and the third electrode 114 are connected via a fourth connection structure 126. The presence of the fourth electrode 125 further separates the third electrode 114 from the substrate, which is beneficial to the performance of the high-frequency device. The auxiliary electrode may further include a third portion 127 located on the same layer as the fourth electrode 122. The third portion and the second portion 123 are connected via a third connection structure 128. A bending protective layer (BPL) 129 may be provided between the third electrode 114 and the fourth electrode 125 to isolate the third electrode 114 from the fourth electrode 125.

[0067] In the embodiment of the present application, after the organic common layer 103 and the first electrode 107 are formed, when a laser is irradiated from the side of the substrate 101 away from the shielding layer 102, the first electrode 107 can absorb the laser and be dissolved. Then, the first electrode 107 located in the non-pixel area can have a third through hole. The projection of the third through hole on the organic common layer 103 along the display direction of the display panel coincides with the second through hole 106, and the side wall of the third through hole is aligned with the side wall of the second through hole 106. Figure 13 As shown, this is a structural schematic diagram of another display panel provided in an embodiment of the present application. Part of the electrode where the projection of the first electrode 107 on the shielding layer 102 along the display direction of the display panel overlaps with the first through hole 105 is removed by laser, that is, the first electrode is not covered in the second through hole 106 and the first groove 110.

[0068] The display panel provided in the embodiment of the present application may be an OLED display panel. Figure 14As shown in FIG, a schematic diagram of the structure of an OLED provided in an embodiment of the present application, the OLED display panel includes an anode (Anode), a hole injection layer (HIL), a hole transport layer (HTL), a compensation layer (Prime), an emitting layer (EML), a hole blocking layer (HBL), an electron transport layer (ETL), an electron injection layer (EIL), a cathode and a cover plate (CPL) stacked in sequence. Among them, the anode is the aforementioned second electrode 108, the hole transport layer and the electron transport layer are the aforementioned organic common layer 103. Of course, the aforementioned organic common layer 103 can also include a hole injection layer and an electron injection layer. The compensation layer includes a red compensation layer (R-Prime), a blue compensation layer (B-Prime) and a green compensation layer (G-Prime), which are respectively used to adjust the cavity length of each sub-pixel and thus adjust the optical performance. The light-emitting layer 104 includes a red light-emitting layer (R-EML), a blue light-emitting layer (B-EML) and a green light-emitting layer (G-EML). The compensation layer and the light-emitting layer are stacked and the side walls can be aligned. The cathode is the aforementioned first electrode 107.

[0069] The display principle of the OLED display panel is to apply a certain voltage to the cathode and anode respectively. The holes from the anode are injected into the hole transport layer through the hole injection layer, and the electrons from the cathode are injected into the electron transport layer through the electron injection layer. The holes and electrons migrate to the organic light-emitting layer through the hole transport layer and the electron transport layer respectively, and form excitons in the organic light-emitting layer. The excitons excite the light-emitting molecules in the organic light-emitting layer to emit light. Among them, the hole blocking layer is used to block holes from passing through the light-emitting layer into the electron transport layer, so that holes and electrons combine in the light-emitting layer to form excitons. The light-emitting layer EML includes R-EML, G-EML and B-EML, and the compensation layer Prime includes R-Prime, G-Prime and B-Prime, which are used to adjust the OLED cavity length and thus adjust the optical performance.

[0070] The display panel provided in the embodiment of the present application may also be a tandem OLED display panel. A display panel that uses a tandem OLED to emit light is called a tandem OLED display panel. A tandem OLED is formed by stacking multiple OLED light-emitting units in series through a charge generation layer (CGL). Figure 15 , which is a schematic diagram of a model of a traditional OLED and a tandem OLED provided in an embodiment of the present application, Figure 15 (a) is a traditional OLED model, which includes a pixel electrode (Pixel) and an OLED light-emitting unit. Figure 15 (b) is a Tandem OLED model, which includes a pixel electrode (Pixel) and two OLED light-emitting units.

[0071] The series-connected OLED display panel enables all light-emitting units to be driven at the same current density, thereby greatly improving the brightness of the Tandem OLED display panel. Specifically, when the Tandem OLED display panel connects multiple OLED light-emitting units in series, such as when two OLED light-emitting units are connected in series, the applied cathode voltage will be doubled, the current efficiency will also be doubled, and the constant current life decay will be consistent, so the corresponding constant brightness life will be more than doubled, the potential for life improvement is greater, and the power consumption also has advantages. However, when the cathode voltage is doubled, the Tandem OLED display panel will generate a larger leakage current, resulting in more serious pixel stealing, which greatly reduces the display effect of the display panel. The second through hole 106 in the aforementioned organic common layer 103 can effectively improve the pixel transparency. In addition, the auxiliary electrode can further improve the pixel transparency.

[0072] When the display panel is a Tandem OLED display panel, the organic common layer may include multiple groups corresponding to multiple OLED light-emitting units. The multiple groups of organic common layers are stacked in sequence, and a charge generation layer is provided between two adjacent groups of organic common layers. The pixel area between the two carrier transport layers in each group of organic common layers is used to set the light-emitting layer. Figure 16 As shown, a schematic diagram of the structure of a Tandem OLED display panel provided in an embodiment of the present application includes an anode, a hole injection layer, a hole transport layer, a compensation layer, a light-emitting layer, a hole blocking layer, an electron transport layer, a hole transport layer, a compensation layer, a light-emitting layer, an electron transport layer, an electron injection layer, a cathode and a cover plate stacked in sequence, each group of organic common layers includes a hole transport layer and an electron transport layer, and a charge generation layer is provided between the two groups of organic common layers. The charge generation layer includes a P-type charge generation layer (CGL-P) and an N-type charge generation layer (CGL-N), which are used to generate holes and electrons, respectively, and a light-emitting layer is provided between the electron transport layer and the hole transport layer.

[0073] An embodiment of the present application provides a display panel, which includes a substrate, a shielding layer, an organic common layer and a light-emitting layer. The substrate has a pixel area and a non-pixel area. The shielding layer is located on one side of the substrate for shielding laser. The shielding layer has a first through hole in the non-pixel area. The organic common layer is located on the side of the shielding layer away from the substrate, and includes two carrier transport layers stacked in sequence. A light-emitting layer is arranged between the two carrier transport layers in the pixel area. In the prior art, the organic common layer connects the pixel area and the non-pixel area of ​​the display panel, and the display panel is prone to generate a large leakage current. In an embodiment of the present application, the organic common layer has a second through hole in the non-pixel area, so that the organic common layer located in the non-pixel area is disconnected at the second through hole, which can cut off the transmission path of the leakage current in the organic common layer, effectively reduce the leakage current, suppress the pixel stealing phenomenon of unlit pixels, and improve the display effect of the display panel. In addition, a shielding layer having a first through hole can be used to shield laser light. Laser light is irradiated from the side of the substrate away from the shielding layer to form a second through hole in the organic common layer. The projection of the second through hole on the shielding layer along the display direction of the display panel coincides with the first through hole. In this way, multiple second through holes can be formed in the organic common layer quickly and accurately, which takes less time and can improve production capacity. Fast and efficient processes can be used to reduce device leakage current and suppress the pixel stealing phenomenon of the device.

[0074] Based on the above display panel, the present application embodiment also provides a method for manufacturing a display panel, referring to Figure 17 1 is a flow chart of a method for manufacturing a display panel provided in an embodiment of the present application, and the method includes the following steps.

[0075] S101, providing a substrate, wherein the substrate has a pixel area and a non-pixel area.

[0076] The substrate 101 may include a first polyimide (PI) layer, a first isolation layer, a second PI layer, and a second isolation layer stacked in sequence. The first PI layer is located on a side of the second PI layer away from the thin film transistor. The isolation layer may be made of polysilicon.

[0077] The substrate 101 has a pixel area and a non-pixel area, and the pixel areas are arranged in an array. The pixel area of ​​the substrate 101 is used to set the OLED structure for light emission, and the non-pixel area is located between two adjacent pixel areas.

[0078] S102 , forming a shielding layer on one side of the substrate, the shielding layer being used to shield laser light, and the shielding layer having a first through hole in a non-pixel area.

[0079] The shielding layer can be a back metal film (BSM), which can be made of metal. The shielding layer can isolate the substrate from the device structure thereon, reducing the impact of the substrate on the device structure. The shielding layer can be formed by deposition, sputtering, etc.

[0080] S103 , forming an organic common layer and a light-emitting layer on a side of the shielding layer facing away from the substrate, wherein the organic common layer includes two carrier transport layers stacked in sequence, and the light-emitting layer is located between the two carrier transport layers and in the pixel area.

[0081] The organic common layer 103 is located on one side of the substrate 101 and includes two sequentially stacked carrier transport layers, including an electron transport layer 1031 and a hole transport layer 1032. The light-emitting layer 104 is located between the two carrier transport layers and in the pixel area. Different materials in the light-emitting layer 104 can be used to emit different colors of light, allowing the light-emitting device to which the light-emitting layer belongs to function as sub-pixels of different colors. A pixel unit can include multiple sub-pixels, for example, red (R), green (G), and blue (B).

[0082] The organic common layer and the light-emitting layer can be formed by deposition, coating, and the like.

[0083] S104 , using the shielding layer as a shield, irradiating the substrate from a side away from the shielding layer with a laser to form a second through hole in the organic common layer, wherein a projection of the second through hole on the shielding layer along a display direction of the display panel overlaps with the first through hole.

[0084] Specifically, the laser irradiated from the side of the substrate away from the shielding layer can be a point laser source or a line laser source. When the laser is irradiated from the side of the substrate away from the shielding layer, in the display direction perpendicular to the display panel, the laser is irradiated on the organic common layer through the first through hole, and the organic common layer 103 absorbs the laser and is dissolved to form a second through hole.

[0085] In the embodiment of the present application, before forming the organic common layer and the light-emitting layer on the side of the shielding layer facing away from the substrate in S103, the method further includes:

[0086] S105, forming a second electrode on a side of the shielding layer facing away from the substrate, the second electrode being located in the pixel area;

[0087] S106, forming a pixel definition layer on a side of the second electrode facing away from the substrate;

[0088] S107, etching the pixel definition layer in the non-pixel area to form a first groove, and the projection of the second through hole in the pixel definition layer along the display direction of the display panel is in the first groove; specifically, the first groove can be formed by using a mask exposure method.

[0089] In S105 , the material of the second electrode may be a material with good conductivity, such as a metal material or a transparent conductive oxide, etc. The second electrode may be formed by a deposition and etching process.

[0090] In S106 , a pixel definition layer may be formed by a deposition process.

[0091] In S107 , the pixel definition layer may be etched using an anisotropic dry etching process.

[0092] After forming the organic common layer and the light-emitting layer on the side of the shielding layer facing away from the substrate in S103, the method further includes:

[0093] S108, forming a first electrode on a side of the organic common layer facing away from the substrate, wherein the portion of the first electrode within the first groove extends along the sidewalls and bottom surface of the first groove. The material of the first electrode can be a material with good conductivity, such as a metal material or a transparent conductive oxide, and the first electrode can be formed by a deposition and etching process. Specifically, the first electrode can be formed by evaporation. Before forming the first electrode, an organic support column can be formed to support the evaporation mask during evaporation to prevent the mask from scratching the display panel.

[0094] In the embodiment of the present application, the first groove may penetrate the pixel definition layer. Before S106, the method further includes:

[0095] S109 , forming a flat layer on a side of the second electrode facing away from the substrate, wherein the flat layer is used to cover the second electrode below the flat layer, and the flat layer has a flat upper surface.

[0096] In addition, after S107 , the flat layer at the bottom of the first groove may be etched to form a second groove. The first groove and the second groove are connected. In a plane perpendicular to the display direction of the display panel, the size of the second groove is smaller than that of the first groove.

[0097] In the embodiment of the present application, the number of the first grooves and the number of the second grooves are multiple, and the number of the first grooves is equal to the number of the second grooves.

[0098] In the embodiment of the present application, the first groove and the second groove are strip-shaped in a plane perpendicular to the display direction of the display panel, and the extension direction of the first groove and the second groove is perpendicular to the line connecting the pixel areas on both sides of the first groove.

[0099] In the embodiment of the present application, before S106, an auxiliary electrode may be further formed in the non-pixel region. After the first groove is formed, the first auxiliary electrode exposes the auxiliary electrode, and the auxiliary electrode contacts the first electrode located at the bottom of the first groove. In the embodiment of the present application, the auxiliary electrode includes a first portion located in the same layer as the second electrode, and the first portion and the second electrode are formed using the same process.

[0100] In the embodiment of the present application, before S105, the method further includes:

[0101] S110, forming a thin film transistor on a side of the shielding layer facing away from the substrate, the thin film transistor including a source region, a drain region, and a gate, wherein the source region is used to connect to a source line;

[0102] S111, forming a third electrode and a second portion of the auxiliary electrode on a side of the thin film transistor facing away from the substrate, wherein the third electrode is located in the pixel region and is used to connect the drain region and the second electrode, and the second portion is located in the non-pixel region;

[0103] S112, forming a first connection structure connected to the third electrode on a side of the third electrode facing away from the substrate, for connecting the third electrode and the second electrode, and forming a second connection structure connected to the second part on a side of the second part facing away from the substrate, for connecting the first part and the second part.

[0104] In the embodiment of the present application, before S111, the method further includes:

[0105] S113, forming a fourth electrode and a third portion of the auxiliary electrode on a side of the thin film transistor facing away from the substrate, wherein the fourth electrode is located in the pixel region and is used to connect the drain region and the third electrode, and the third portion is located in the non-pixel region;

[0106] S114, forming a fourth connection structure connected to the fourth electrode on a side of the fourth electrode facing away from the substrate, for connecting the fourth electrode and the third electrode, and forming a third connection structure connected to the third part on a side of the third part facing away from the substrate, for connecting the third part and the second part.

[0107] In an embodiment of the present application, the shielding layer is used as a shield, and a laser is used to irradiate from the side of the substrate away from the shielding layer, and is also used to form a third through hole in the first electrode located in the non-pixel area. The projection of the third through hole on the organic common layer along the display direction of the display panel coincides with the second through hole.

[0108] In an embodiment of the present application, the organic common layer includes multiple groups, which are stacked in sequence. There is a charge generation layer between two adjacent groups of organic common layers, and the pixel area between the two carrier transport layers in each group of organic common layers is used to set the light-emitting layer.

[0109] The present invention provides a method for manufacturing a display panel, wherein a substrate is provided, wherein the substrate has a pixel region and a non-pixel region, a shielding layer is formed on one side of the substrate, the shielding layer being used to shield laser light, the shielding layer having a first through hole in the non-pixel region, an organic common layer and a light-emitting layer are formed on a side of the shielding layer facing away from the substrate, the organic common layer comprising two carrier transport layers stacked in sequence, the light-emitting layer being located between the two carrier transport layers and located in the pixel region, the shielding layer being used as a shield, and a laser being irradiated from a side of the substrate away from the shielding layer to form a second through hole in the organic common layer, the projection of the second through hole on the shielding layer along the display direction of the display panel coincides with the first through hole. In the prior art, the organic common layer connects the pixel region and the non-pixel region of the display panel, which easily generates a large leakage current in the display panel. In the present invention, the organic common layer has a second through hole in the non-pixel region, so that the organic common layer located in the non-pixel region is disconnected at the second through hole, which can cut off the transmission path of the leakage current in the organic common layer, effectively reducing the leakage current, suppressing the phenomenon of pixel stealing in unlit pixels, and improving the display effect of the display panel. In addition, a shielding layer having a first through hole can be used to shield laser light. Laser light is irradiated from the side of the substrate away from the shielding layer to form a second through hole in the organic common layer. The projection of the second through hole on the shielding layer along the display direction of the display panel coincides with the first through hole. In this way, multiple second through holes can be formed in the organic common layer quickly and accurately, which takes less time and can improve production capacity. Fast and efficient processes can be used to reduce device leakage current and suppress the pixel stealing phenomenon of the device.

[0110] Based on a display panel provided in the above embodiment, Figure 18 As shown, an embodiment of the present application also provides a display device, which includes the display panel described above. The display device has a display area AA and a non-display area NA, and the non-display area is arranged to surround the display area. The display area AA includes a pixel area and a non-pixel area. The pixel area is used to set the OLED, and the non-display area NA is used to set the wiring. The display device adopts the aforementioned display panel to improve pixel stealing.

[0111] When introducing elements of various embodiments of the present application, the articles "a," "an," "the," and "said" are intended to mean that there are one or more elements. The words "comprising," "including," and "having" are inclusive and mean that there may be additional elements other than the listed elements.

[0112] The various embodiments in this specification are described in a progressive manner. Similar portions between the various embodiments can be referenced to each other. Each embodiment focuses on the differences between the other embodiments. In particular, the method embodiments are described briefly because they are generally similar to the device embodiments. For relevant portions, refer to the description of the device embodiments.

[0113] The above is only a preferred embodiment of the present application. Although the present application has been disclosed as a preferred embodiment, it is not intended to limit the present application. Any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present application without departing from the scope of the technical solution of the present application, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of protection of the technical solution of the present application.

Claims

1. A display panel, characterized in that: include: A substrate having a pixel area and a non-pixel area; a shielding layer, located on one side of the substrate, the shielding layer being used to shield laser light, and the shielding layer having a first through hole in the non-pixel area; an organic common layer located on a side of the shielding layer facing away from the substrate, the organic common layer having a second through hole in the non-pixel area; a projection of the second through hole on the shielding layer along the display direction of the display panel coincides with the first through hole; the organic common layer comprises two carrier transport layers stacked in sequence; a light-emitting layer, located between the two carrier transport layers and in the pixel region; The display panel further includes: a first electrode, located on a side of the organic common layer facing away from the substrate; a second electrode located between the shielding layer and the pixel definition layer and located in the pixel area; a pixel definition layer located between the shielding layer and the organic common layer, the pixel definition layer having a first groove in the non-pixel region, the second through hole projected onto the pixel definition layer in the display direction of the display panel, and a portion of the first electrode within the first groove extending along a sidewall and a bottom surface of the first groove; The first groove passes through the pixel definition layer, and the display panel further includes: A flat layer is located between the shielding layer and the pixel definition layer, and the flat layer located in the non-pixel area is provided with a second groove, the first groove and the second groove are connected, and the size of the second groove is smaller than the size of the first groove in a plane perpendicular to the display direction of the display panel; the portion of the first electrode in the second groove extends along the side wall and bottom surface of the second groove.

2. The display panel according to claim 1, wherein: The number of the first grooves and the number of the second grooves are multiple, and the number of the first grooves is equal to the number of the second grooves.

3. The display panel according to claim 1, wherein: The first groove and the second groove are strip-shaped in a plane perpendicular to the display direction of the display panel, and the extending direction of the first groove and the second groove is perpendicular to a line connecting pixel areas on both sides of the first groove.

4. The display panel according to any one of claims 1 to 3, wherein: The display panel further includes: The auxiliary electrode is located on a side of the pixel definition layer away from the first electrode, and the auxiliary electrode is in contact with the first electrode located at the bottom of the first groove.

5. The display panel according to claim 4, wherein: The auxiliary electrode includes a first portion located in the same layer as the second electrode.

6. The display panel according to claim 5, wherein: The display panel further includes: a third electrode, located in the pixel region and between the second electrode and the shielding layer, and connected to the second electrode via a first connection structure; a thin film transistor, located between the second electrode and the shielding layer, comprising a source region, a drain region and a gate, wherein the source region is used to connect to a source line, and the third electrode is used to connect the second electrode and the drain region; The auxiliary electrode further includes a second portion located in the same layer as the third electrode, and the first portion and the second portion are connected via a second connection structure.

7. The display panel according to claim 6, wherein: The display panel further includes: a fourth electrode, located in the pixel region and configured to connect the third electrode and the drain region, the fourth electrode and the third electrode being connected via a fourth connecting structure; The auxiliary electrode further includes a third portion located in the same layer as the fourth electrode, and the third portion is connected to the second portion via a third connecting structure.

8. The display panel according to any one of claims 1 to 3, wherein: The organic common layer includes multiple groups, which are stacked in sequence. There is a charge generation layer between two adjacent groups of organic common layers. The pixel area between the two carrier transport layers in each group of organic common layers is used to set the light-emitting layer.

9. A method for manufacturing a display panel, characterized in that: include: Providing a substrate, wherein the substrate has a pixel area and a non-pixel area; forming a shielding layer on one side of the substrate, the shielding layer being used to shield laser light, the shielding layer having a first through hole in the non-pixel area; An organic common layer and a light-emitting layer are formed on a side of the shielding layer facing away from the substrate, wherein the organic common layer includes two carrier transport layers stacked in sequence; the light-emitting layer is located between the two carrier transport layers and in the pixel area; Using the shielding layer as a shield, irradiate the substrate from a side away from the shielding layer with a laser to form a second through hole in the organic common layer, wherein a projection of the second through hole on the shielding layer along the display direction of the display panel coincides with the first through hole; Before forming the organic common layer and the light-emitting layer on the side of the shielding layer facing away from the substrate, the method further includes: forming a second electrode on a side of the shielding layer facing away from the substrate, wherein the second electrode is located in the pixel area; forming a pixel definition layer on a side of the second electrode facing away from the substrate; The pixel definition layer is etched in the non-pixel area to form a first groove, wherein the second through hole is projected in the first groove on the pixel definition layer along the display direction of the display panel; After forming an organic common layer and a light-emitting layer on a side of the shielding layer facing away from the substrate, the method further includes: forming a first electrode on a side of the organic common layer facing away from the substrate, wherein a portion of the first electrode in the first groove extends along a sidewall and a bottom surface of the first groove; The first groove penetrates the pixel definition layer, and before the pixel definition layer is formed on the side of the second electrode facing away from the substrate, the method further includes: forming a flat layer on a side of the second electrode facing away from the substrate; After etching the pixel definition layer in the non-pixel area to form a first groove, the method further includes: The flat layer at the bottom of the first groove is etched to form a second groove, the first groove and the second groove are connected, and the size of the second groove is smaller than the size of the first groove in a plane perpendicular to the display direction of the display panel; the portion of the first electrode in the second groove extends along the side wall and bottom surface of the second groove.

10. The method according to claim 9, characterized in that The number of the first grooves and the number of the second grooves are multiple, and the number of the first grooves is equal to the number of the second grooves.

11. The method according to claim 9, characterized in that The first groove and the second groove are strip-shaped in a plane perpendicular to the display direction of the display panel, and the extending direction of the first groove and the second groove is perpendicular to a line connecting pixel areas on both sides of the first groove.

12. The method according to any one of claims 9 to 11, characterized in that: Before forming a pixel definition layer on a side of the second electrode facing away from the substrate, the method further includes: An auxiliary electrode is formed in the non-pixel area. After the first groove is formed, the first groove exposes the auxiliary electrode. The auxiliary electrode contacts the first electrode located at the bottom of the first groove.

13. The method according to claim 12, characterized in that The auxiliary electrode includes a first portion located in the same layer as the second electrode, and the first portion and the second electrode are formed by a same process.

14. The method according to claim 13, characterized in that Before forming the second electrode on the side of the shielding layer facing away from the substrate, the method further includes: forming a thin film transistor on a side of the shielding layer away from the substrate, the thin film transistor comprising a source region, a drain region and a gate, the source region being used to connect a source line; forming a third electrode and a second portion of the auxiliary electrode on a side of the thin film transistor facing away from the substrate, wherein the third electrode is located in the pixel area and is used to connect the drain area and the second electrode, and the second portion is located in the non-pixel area; A first connecting structure connected to the third electrode is formed on a side of the third electrode facing away from the substrate, for connecting the third electrode and the second electrode, and a second connecting structure connected to the second part is formed on a side of the second part facing away from the substrate, for connecting the first part and the second part.

15. The method according to claim 14, characterized in that Before forming the third electrode and the second portion of the auxiliary electrode on the side of the thin film transistor facing away from the substrate, the method further includes: forming a fourth electrode and a third portion of the auxiliary electrode on a side of the thin film transistor facing away from the substrate, wherein the fourth electrode is located in the pixel area and is used to connect the drain area and the third electrode, and the third portion is located in the non-pixel area; A fourth connection structure connected to the fourth electrode is formed on a side of the fourth electrode facing away from the substrate, for connecting the fourth electrode and the third electrode, and a third connection structure connected to the third part is formed on a side of the third part facing away from the substrate, for connecting the third part and the second part.

16. The method according to any one of claims 9 to 11, characterized in that: The organic common layer includes multiple groups, which are stacked in sequence. There is a charge generation layer between two adjacent groups of organic common layers. The pixel area between the two carrier transport layers in each group of organic common layers is used to set the light-emitting layer.

17. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 8.

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