PMOLED display panel and display device

Abstract

The utility model discloses a PMOLED display panel comprising a substrate, the substrate comprises a display area and a non-display area, the display area comprises a first display area and a second display area, and the second display area is located on one side of the first display area and adjacent to the first display area; the first anodes, the first light-emitting functional layer and the first cathodes are arranged in a stacked mode, and the first anodes and the first cathodes are arranged in a crossed mode; a plurality of second anodes, a second light-emitting functional layer and a plurality of second cathodes which are arranged in a stacked manner, wherein the second anodes and the second cathodes are arranged in a crossed manner; the first anode and the second anode are transparent electrodes, the first cathode is a non-transparent electrode, the second cathode is a transparent electrode, and the first anode and the second anode are on the same layer. According to the utility model, the preparation process can be simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of displays, in particular to a PMOLED display panel and a display device. Background Art

[0002] A double-sided display screen is a special design with screens on both the front and back sides to meet different display requirements. The uniqueness of this design lies in that when one screen is turned on, the other screen is also started simultaneously, which not only reduces energy consumption but also improves the user experience.

[0003] The existing double-sided display screens have the problem of complex manufacturing processes. Summary of the Utility Model

[0004] The utility model provides a PMOLED display panel and a display device, which can simplify the manufacturing process.

[0005] In a first aspect, an embodiment of the utility model provides a PMOLED display panel, including: a substrate, the substrate includes a display area and a non-display area, the display area includes a first display area and a second display area located on one side of the first display area and adjacent to the first display area; a plurality of first anodes, a first light-emitting functional layer, and a plurality of first cathodes stacked, the first anodes and the first cathodes are arranged in a cross pattern; a plurality of second anodes, a second light-emitting functional layer, and a plurality of second cathodes stacked, the second anodes and the second cathodes are arranged in a cross pattern; the first anode and the second anode are both transparent electrodes, the first cathode is an opaque electrode, the second cathode is a transparent electrode, and the first anode and the second anode are in the same layer.

[0006] Optionally, the plurality of first anodes are arranged at intervals in a strip shape, and the plurality of second anodes are arranged at intervals in a strip shape; the first anode and the second anode are both located in a first conductive layer, and the first conductive layer is located on the side of the first light-emitting functional layer close to the substrate.

[0007] Optionally, the first conductive layer further includes a plurality of first traces and a plurality of second traces; the first traces are connected to the corresponding first anodes, and the second traces are connected to the corresponding second anodes, for respectively providing a first power supply voltage signal to the first anode and the second anode; the PMOLED display panel further includes a plurality of third traces and a plurality of fourth traces; the third traces are connected to the corresponding first cathodes, and the fourth traces are connected to the corresponding second cathodes, for respectively providing a second power supply voltage signal to the first cathode and the second cathode.

[0008] Optionally, the PMOLED display panel further includes a plurality of first overlapping portions and a plurality of second overlapping portions; the first overlapping portions and the second overlapping portions are located on the first conductive layer; the first overlapping portions are located between the third trace and the substrate, and the third trace overlaps with the first overlapping portion directly below; the second overlapping portions are located between the fourth trace and the substrate, and the fourth trace overlaps with the second overlapping portion directly below.

[0009] Optionally, the first cathode overlaps with the corresponding third trace, and a plurality of vias are provided at the overlapping portion of the third trace and the first cathode; the second cathode overlaps with the corresponding fourth trace, and a plurality of vias are provided at the overlapping portion of the fourth trace and the second cathode.

[0010] Optionally, the PMOLED display panel further includes a first pixel defining layer and a second pixel defining layer; the first pixel defining layer includes a first opening, and the second pixel defining layer includes a second opening; the first opening exposes a part of the first anode, and the second opening exposes a part of the second anode; the first light-emitting functional layer is located in the first opening, and the second light-emitting functional layer is located in the second opening.

[0011] Optionally, the PMOLED display panel further includes a first isolation pillar and a second isolation pillar; the first isolation pillar is located on the side of the first pixel defining layer away from the substrate and is provided at the junction of adjacent first cathodes for isolating adjacent first cathodes; the second isolation pillar is located on the side of the second pixel defining layer away from the substrate and is provided at the junction of adjacent second cathodes for isolating adjacent second cathodes.

[0012] Optionally, the first light-emitting functional layer includes a first hole injection layer, a first hole transport layer, a first light-emitting layer, a first electron transport layer, and a first electron injection layer stacked in sequence; the second light-emitting functional layer includes a second hole injection layer, a second hole transport layer, a second light-emitting layer, a second electron transport layer, and a second electron injection layer stacked in sequence.

[0013] Optionally, the PMOLED display panel further includes a packaging layer; the packaging layer is located on the side of the first cathode and the second cathode away from the substrate; the packaging layer is a glass plate or a thin-film packaging layer; the PMOLED display panel further includes a glass glue, and the glass glue is located between the first cathode and the packaging layer, and between the second cathode and the packaging layer.

[0014] In a second aspect, an embodiment of the present invention provides a display device, including the PMOLED display panel provided in any embodiment of the present invention.

[0015] The PMOLED display panel provided by the embodiment of the present utility model includes a substrate, a plurality of first anodes, a first light-emitting functional layer, and a plurality of first cathodes stacked thereon, and a plurality of second anodes, a second light-emitting functional layer, and a plurality of second cathodes stacked thereon. By setting the first anode as a transparent electrode and the first cathode as an opaque electrode, the first OLED light-emitting device formed by the first anode, the first light-emitting functional layer, and the first cathode can be a bottom-emitting type OLED. By setting both the second anode and the second cathode as transparent electrodes, the second OLED light-emitting device formed by the second anode, the second light-emitting functional layer, and the second cathode can be a double-sided light-emitting type OLED. By setting all the first OLED light-emitting devices in the first display area in two adjacent display areas as bottom-emitting type and all the second OLED light-emitting devices in the second display area as double-sided light-emitting type OLEDs, users can view normal display images in both the front and back directions of a display panel, eliminating the need to assemble two display panels back-to-back to achieve double-sided display. This can broaden the usage range of the display panel, reduce the purchase and maintenance costs for users, decrease the occupied space of the double-sided display panel, and simultaneously enhance the aesthetic degree of the double-sided display panel. In addition, by setting the first anode and the second anode on the same layer, the first anode and the second anode can be fabricated on the same layer, reducing the number of times of using the mask plate, thereby simplifying the fabrication process.

[0016] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present utility model, nor is it used to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0018] Figure 1 is a top view structural schematic diagram of a PMOLED display panel provided by the embodiment of the present utility model;

[0019] Figure 2 is Figure 1 a cross-sectional structural schematic diagram of the PMOLED display panel shown along the section line A-A';

[0020] Figure 3 is a structural schematic diagram of a PMOLED display panel provided by the embodiment of the present utility model;

[0021] Figure 4It is a schematic cross-sectional structure diagram of another PMOLED display panel provided by an embodiment of the present invention;

[0022] Figure 5 It is a schematic cross-sectional structure diagram of another PMOLED display panel provided by an embodiment of the present invention;

[0023] Figure 6 It is a schematic structural diagram of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0026] Figure 1 It is a schematic top view structure diagram of a PMOLED display panel provided by an embodiment of the present invention. Figure 2 is Figure 1 The schematic cross-sectional structure diagram of the PMOLED display panel shown along the cross-sectional line A-A'. Combining Figure 1 and Figure 2 as shown, the PMOLED display panel includes:

[0027] A substrate 110, the substrate 110 includes a display area and a non-display area NAA, the display area includes a first display area AA1 and a second display area AA2 located on one side of the first display area AA1 and adjacent to the first display area AA1.

[0028] A plurality of first anodes 12, first light-emitting functional layers 13, and a plurality of first cathodes 14 are stacked, and the first anodes 12 and the first cathodes 14 are arranged crosswise.

[0029] A plurality of second anodes 22, second light-emitting functional layers 23, and a plurality of second cathodes 24 are stacked, and the second anodes 22 and the second cathodes 24 are arranged in a cross pattern.

[0030] Both the first anode 12 and the second anode 22 are transparent electrodes, the first cathode 14 is an opaque electrode, the second cathode 24 is a transparent electrode, and the first anode 12 and the second anode 22 are on the same layer.

[0031] Specifically, the overlapping part of each first anode 12, first light-emitting functional layer 13, and first cathode 14 constitutes a first OLED light-emitting device, and the overlapping part of each second anode 22, second light-emitting functional layer 23, and second cathode 24 constitutes a second OLED light-emitting device. The first OLED light-emitting devices are located in the first display area AA1, and the second OLED light-emitting devices are located in the second display area AA2.

[0032] Since the first anode 12 is a transparent electrode and the first cathode 24 is an opaque electrode, the first OLED light-emitting device is a bottom-emitting OLED. Also, since both the second anode 22 and the second cathode 24 are transparent electrodes, the second OLED light-emitting device is a transparent OLED, that is to say, the second OLED device can emit light from the top or the bottom. By setting all the first OLED light-emitting devices in the first display area AA1 in the adjacent two display areas as bottom-emitting OLEDs and all the second OLED light-emitting devices in the second display area AA2 as double-sided light-emitting OLEDs, users can view normal display images in both the front and back directions of a display panel, eliminating the need to assemble two display panels back-to-back to achieve double-sided display. This can broaden the usage range of the display panel, reduce the purchase and maintenance costs for users, decrease the occupied space of the double-sided display panel, and at the same time enhance the aesthetic degree of the double-sided display panel.

[0033] The substrate 110 can provide functions such as buffering, protection, and support for the display panel. The substrate 110 can be a flexible substrate, and the material of the flexible substrate can be polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), etc., or a mixed material of the above-mentioned multiple materials. The substrate 110 can also be a rigid substrate formed of materials such as glass.

[0034] In the embodiments of the present utility model, there are no special limitations on the materials of the first anode 12 and the second anode 22, as long as the materials of the first anode 12 and the second anode 22 are the same and have transparency and conductivity. Exemplarily, the materials of the first anode 12 and the second anode 22 can be one of indium tin oxide (ITO), doped tin dioxide (FTO), zinc oxide (ZnO), indium gallium zinc oxide (IGZO), and graphene and its derivatives. By arranging the first anode 12 and the second anode 22 on the same layer, the use of a mask plate can be reduced, enabling the first anode 12 and the second anode 22 to be prepared on the same layer, thereby simplifying the preparation process.

[0035] In the embodiments of the present utility model, there are no special limitations on the thicknesses of the first anode 12 and the second anode 22, which can be appropriately set according to the conductive materials used. Exemplarily, the thickness range of the first anode 12 and the second anode 22 can be 40 nm to 500 nm.

[0036] The first light-emitting functional layer 13 includes a first hole injection layer 130, a first hole transport layer 131, a first light-emitting layer 132, a first electron transport layer 133, and a first electron injection layer 134 that are sequentially stacked. When an appropriate voltage is applied between the first anode 12 and the first cathode 14, holes are injected from the first anode 13 and electrons are injected from the first cathode 14 into the first light-emitting functional layer 13, and recombination luminescence occurs in the first light-emitting layer 132 in the first light-emitting functional layer 13.

[0037] The second light-emitting functional layer 23 includes a second hole injection layer 230, a second hole transport layer 231, a second light-emitting layer 232, a second electron transport layer 233, and a second electron injection layer 234 that are sequentially stacked. When an appropriate voltage is applied between the second anode 22 and the second cathode 24, holes are injected from the second anode 22 and electrons are injected from the second cathode 24 into the second light-emitting functional layer 23, and recombination luminescence occurs in the first light-emitting layer 232 in the second light-emitting functional layer 23.

[0038] In the embodiments of the present utility model, there are no special limitations on the material of the first cathode 14, as long as it has opacity and conductivity. Exemplarily, the material of the first cathode 14 can be aluminum (Al).

[0039] In the embodiments of the present utility model, there are no special limitations on the material of the second cathode 24, as long as it has transparency and conductivity. Exemplarily, the material of the second cathode 24 can be silver (Ag).

[0040] The PMOLED display panel provided by the embodiment of the present utility model includes a substrate, a plurality of first anodes, a first light-emitting functional layer, and a plurality of first cathodes that are stacked, and a plurality of second anodes, a second light-emitting functional layer, and a plurality of second cathodes that are stacked. By setting the first anode as a transparent electrode and the first cathode as an opaque electrode, the first OLED light-emitting device formed by the first anode, the first light-emitting functional layer, and the first cathode can be a bottom-emitting type OLED. By setting both the second anode and the second cathode as transparent electrodes, the second OLED light-emitting device formed by the second anode, the second light-emitting functional layer, and the second cathode can be a double-sided light-emitting type OLED. By setting all the first OLED light-emitting devices in the first display area in the adjacent two display areas as bottom-emitting type and all the second OLED light-emitting devices in the second display area as double-sided light-emitting type OLEDs, users can view normal display images in both the front and back directions of a display panel, and there is no need to assemble two display panels back-to-back to achieve double-sided display, which can broaden the usage range of the display panel, reduce the purchase and maintenance costs of users, reduce the occupied space of the double-sided display panel, and at the same time improve the aesthetic degree of the double-sided display panel. In addition, by setting the first anode and the second anode on the same layer, the first anode and the second anode can be prepared on the same layer, reducing the number of times of using the mask plate, thereby simplifying the manufacturing process.

[0041] Continue to refer to Figure 1 and Figure 2 Optionally, a plurality of first anodes 12 are distributed at intervals in a strip shape, and a plurality of second anodes 22 are distributed at intervals in a strip shape; both the first anode 12 and the second anode 22 are located in the first conductive layer 120, and the first conductive layer 120 is located on the side of the first light-emitting functional layer 13 close to the substrate 110.

[0042] Figure 3 is a schematic structural diagram of a PMOLED display panel provided by the embodiment of the present utility model. As Figure 3 shown, the first conductive layer 120 further includes a plurality of first traces 101 and a plurality of second traces 102.

[0043] The first trace 101 is connected to the corresponding first anode 12, and the second trace 102 is connected to the corresponding second anode 22, and is used to provide a first power supply voltage signal to the first anode 12 and the second anode 22 respectively.

[0044] The PMOLED display panel further includes a plurality of third traces 103 and a plurality of fourth traces 104; the third trace 103 is connected to the corresponding first cathode 14, and the fourth trace 104 is connected to the corresponding second cathode 24, and is used to provide a second power supply voltage signal to the first cathode 14 and the second cathode 24 respectively.

[0045] Specifically, in the embodiments of the present utility model, there are no special limitations on the materials of the first wiring 101 and the second wiring 102, as long as they are the same as the materials of the first anode 12 and the second anode 22. Exemplarily, the materials of the first anode 12, the second anode 22, the first wiring 101, and the second wiring 102 can all be ITO.

[0046] In the embodiments of the present utility model, there are no special limitations on the materials of the third wiring 103 and the fourth wiring 104, as long as they have conductivity. Exemplarily, the materials of the third wiring 103 and the fourth wiring 104 can be molybdenum-aluminum-molybdenum (MoAlMo).

[0047] Optionally, the PMOLED display panel may further include a driving chip located in the non-display area. The first wiring 101 and the second wiring 102 are respectively electrically connected to the driving chip and are used to receive the first power voltage signal provided by the driving chip. The third wiring 103 and the fourth wiring 104 are respectively electrically connected to the driving chip and are used to receive the second power voltage signal provided by the driving chip. Optionally, the first power voltage signal may be a high-level signal, and the second power voltage signal may be a low-level signal.

[0048] Optionally, part of the structures of the first wiring 101 and the second wiring 102 are located in the display area, and part of the structures are located in the non-display area. Such a setting can reduce the border of the PMOLED display panel. Optionally, continue to refer to Figure 3 that all of the third wiring 103 and the fourth wiring 104 are located in the non-display area.

[0049] Optionally, continue to refer to Figure 3 that the PMOLED further includes a plurality of first overlapping portions 123 and a plurality of second overlapping portions 124. The first overlapping portions 123 and the second overlapping portions 124 are located in the first conductive layer.

[0050] The first overlapping portion 123 is located between the third wiring 103 and the substrate 110, and the third wiring 103 overlaps the first overlapping portion 123 directly below. The second overlapping portion 124 is located between the fourth wiring 104 and the substrate 110, and the fourth wiring 104 overlaps the second overlapping portion 124 directly below. Such a setting can reduce the impedance of the third wiring 103 and the fourth wiring 104 and improve the reliability of the third wiring 103 and the fourth wiring 104.

[0051] Specifically, in the embodiments of the present utility model, there are no special limitations on the materials of the first overlapping portion 123 and the plurality of second overlapping portions 124, as long as they are the same as the materials of the first anode 12, the second anode 22, the first wiring 101, and the second wiring 102. Such a setting can enable the first anode 12, the second anode 22, the first wiring 101, the second wiring 102, the first overlapping portion 123, and the second overlapping portion 124 to be prepared in the same layer, simplify the manufacturing process, and reduce costs.

[0052] Figure 4 It is a schematic cross-sectional structure diagram of another PMOLED display panel provided by an embodiment of the present invention. As Figure 4 shown, the first cathode 14 is lapped to the corresponding third trace 103, and a plurality of vias 11 are provided at the portion where the third trace 103 is lapped with the first cathode 14. The second cathode 24 is lapped to the corresponding fourth trace 104, and a plurality of vias 11 are provided at the portion where the fourth trace 104 is lapped with the second cathode 24. By setting like this, the conductivity of the third trace 103 and the fourth trace 104 can be increased.

[0053] Optionally, continue to refer to Figure 4 This PMOLED display panel further includes a first pixel definition layer 121 and a second pixel definition layer 122; the first pixel definition layer 121 includes a first opening 10, and the second pixel definition layer includes a second opening 20.

[0054] A part of the first anode 12 is exposed by the first opening 10, and a part of the second anode 22 is exposed by the second opening 20; the first light-emitting functional layer 13 is located within the first opening, and the second light-emitting functional layer 23 is located within the second opening 20.

[0055] Specifically, the embodiments of the present invention do not limit the materials of the first pixel definition layer 121 and the second pixel definition layer 122. Exemplarily, the materials of the first pixel definition layer 121 and the second pixel definition layer 122 can be one or more of polyimide, polyethylene naphthalate, polyethylene terephthalate, polycarbonate (PC), polyetherimide (PEI), and polyethersulfone (PES).

[0056] Among them, the first opening 10 includes a red sub-pixel opening, a green sub-pixel opening, and a blue sub-pixel opening, the first light-emitting functional layer 13 includes a red light-emitting functional layer, a green light-emitting functional layer, and a blue light-emitting functional layer, and the red light-emitting functional layer, the green light-emitting functional layer, and the blue light-emitting functional layer are respectively arranged corresponding to the red sub-pixel opening, the green sub-pixel opening, and the blue sub-pixel opening.

[0057] The second opening 20 includes a red sub-pixel opening, a green sub-pixel opening, and a blue sub-pixel opening, the second light-emitting functional layer 23 includes a red light-emitting functional layer, a green light-emitting functional layer, and a blue light-emitting functional layer, and the red light-emitting functional layer, the green light-emitting functional layer, and the blue light-emitting functional layer are respectively arranged corresponding to the red sub-pixel opening, the green sub-pixel opening, and the blue sub-pixel opening.

[0058] Optionally, continue to refer to Figure 4, the PMOLED display panel further includes a first isolation column 30 and a second isolation column 40. The first isolation column 30 is located on the side of the first pixel defining layer 121 away from the substrate 110 and is disposed at the junction of adjacent first cathodes 14 for isolating adjacent first cathodes 14.

[0059] The second isolation column 40 is located on the side of the second pixel defining layer 122 away from the substrate 110 and is disposed at the junction of adjacent second cathodes 24 for isolating adjacent second cathodes 24.

[0060] Optionally, both the first isolation column 30 and the second isolation column 40 are in an inverted trapezoidal structure. The first isolation column 30 spaces and insulates the first cathodes 14, and the second isolation column 40 spaces and insulates the second cathodes 24. In this way, it can prevent the first cathodes 14 from conducting with each other and the second cathodes 24 from conducting with each other and affecting each other, thereby improving the display effect.

[0061] Figure 5 is a schematic cross-sectional structure diagram of another PMOLED display panel provided by an embodiment of the present invention. Refer to Figure 5 , the PMOLED display panel further includes a packaging layer 140, and the packaging layer 140 is located on the side of the first cathode 14 and the second cathode 24 away from the substrate 110.

[0062] Optionally, the packaging layer 140 is a glass plate or a thin film packaging layer. The packaging layer 140 can, to a certain extent, block the entry of water and oxygen into the PMOLED display panel, reduce the influence of water and oxygen in the environment on the PMOLED display panel, and thus improve the performance of the PMOLED display panel.

[0063] Optionally, continue to refer to Figure 5 , the PMOLED display panel further includes a glass glue 50, and the glass glue 50 is located between the first cathode 14 and the packaging layer 140, and between the second cathode 24 and the packaging layer 140. The glass glue 50 is used to bond the packaging layer 140 and the substrate 110 together to seal and package the OLED light-emitting device.

[0064] Based on the same inventive concept, an embodiment of the present invention further provides a display device, Figure 6 is a schematic structural diagram of a display device provided by an embodiment of the present invention. Refer to Figure 6 , the display device may include the PMOLED display panel provided by any embodiment of the present invention. The PMOLED display device may be Figure 5 the mobile phone shown in the figure, or may be a computer, a television, a smart wearable display device, etc., and the embodiments of the present invention do not make special limitations thereto.

[0065] The above specific embodiments do not constitute a limitation to the protection scope of the present utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A PMOLED display panel, characterized in that: include: A substrate, the substrate comprising a display area and a non-display area, the display area comprising a first display area and a second display area located at one side of the first display area and adjacent to the first display area; A plurality of first anodes, a first light-emitting functional layer and a plurality of first cathodes are stacked, wherein the first anodes and the first cathodes are arranged crosswise; A plurality of second anodes, a second light-emitting functional layer and a plurality of second cathodes are stacked, wherein the second anodes and the second cathodes are arranged crosswise; The first anode and the second anode are both transparent electrodes, the first cathode is an opaque electrode, the second cathode is a transparent electrode, and the first anode and the second anode are in the same layer.

2. The PMOLED display panel according to claim 1, characterized in that: A plurality of the first anodes are distributed in strips at intervals, and a plurality of the second anodes are distributed in strips at intervals; The first anode and the second anode are both located in the first conductive layer, and the first conductive layer is located on a side of the first light-emitting functional layer close to the substrate.

3. The PMOLED display panel according to claim 2, characterized in that: The first conductive layer further includes a plurality of first routing lines and a plurality of second routing lines; The first wiring is connected to the corresponding first anode, and the second wiring is connected to the corresponding second anode, and is used to provide a first power supply voltage signal to the first anode and the second anode respectively; It also includes a plurality of third wirings and a plurality of fourth wirings; the third wirings are connected to the corresponding first cathodes, and the fourth wirings are connected to the corresponding second cathodes, for providing second power supply voltage signals to the first cathodes and the second cathodes respectively.

4. The PMOLED display panel according to claim 3, characterized in that: Also includes a plurality of first overlapping portions and a plurality of second overlapping portions; The first overlapping portion and the second overlapping portion are located in the first conductive layer; The first overlapping portion is located between the third routing line and the substrate, and the third routing line is overlapped to the first overlapping portion directly below; The second overlapping portion is located between the fourth routing line and the substrate, and the fourth routing line is overlapped to the second overlapping portion directly below.

5. The PMOLED display panel according to claim 3, characterized in that: The first cathode is overlapped to the corresponding third routing line, and a plurality of vias are provided at the portion where the third routing line overlaps with the first cathode; the second cathode is overlapped to the corresponding fourth routing line, and a plurality of vias are provided at the portion where the fourth routing line overlaps with the second cathode.

6. The PMOLED display panel according to claim 1, characterized in that: Also includes a first pixel definition layer and a second pixel definition layer; the first pixel definition layer includes a first opening, and the second pixel definition layer includes a second opening; The first opening exposes a portion of the first anode, and the second opening exposes a portion of the second anode; The first light-emitting functional layer is located in the first opening, and the second light-emitting functional layer is located in the second opening.

7. The PMOLED display panel according to claim 6, characterized in that: Also includes a first isolation column and a second isolation column; The first isolation column is located on a side of the first pixel definition layer away from the substrate and is disposed at the junction of adjacent first cathodes, and is used to isolate adjacent first cathodes; The second isolation column is located on a side of the second pixel definition layer away from the substrate and is disposed at the junction of adjacent second cathodes, and is used to isolate adjacent second cathodes.

8. The PMOLED display panel according to claim 1, characterized in that: The first light-emitting functional layer includes a first hole injection layer, a first hole transport layer, a first light-emitting layer, a first electron transport layer and a first electron injection layer which are stacked in sequence; The second light-emitting functional layer includes a second hole injection layer, a second hole transport layer, a second light-emitting layer, a second electron transport layer and a second electron injection layer which are stacked in sequence.

9. The PMOLED display panel according to claim 1, characterized in that: Also includes an encapsulation layer; The encapsulation layer is located on a side of the first cathode and the second cathode away from the substrate; the encapsulation layer is a glass plate or a thin film encapsulation layer; The PMOLED display panel further includes glass glue, and the glass glue is located between the first cathode and the encapsulation layer, and between the second cathode and the encapsulation layer.

10. A display device, characterized in that: A PMOLED display panel comprising any one of claims 1 to 9.

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