Display panel and display device

Abstract

The invention provides a display panel and a display device, the display panel comprises a display area and a wiring area, the display area is internally provided with red, green and blue light-emitting devices arranged in an array, the wiring area is internally provided with first and second power supply wires, the first power supply wire supplies power to first cathodes of the corresponding red and green light-emitting devices, and the second power supply wire supplies power to second cathodes of the corresponding red and green light-emitting devices. The second power supply wires supply power to the second cathodes of the corresponding blue light-emitting devices, the first cathodes and the second cathodes are arranged at intervals, and the potential of the first power supply wires is larger than that of the second power supply wires. The first power line comprises a first main line, a first branch line and a second branch line, the second power line comprises a second main line, a third branch line and a fourth branch line, the first main line and the second main line are arranged in the wiring area in a concentric-square-shaped mode, and the first branch line and the third branch line are arranged at intervals in the second direction and penetrate through the display area in the first direction; the second branch lines and the fourth branch lines are arranged at intervals in the first direction and penetrate through the display area in the second direction, and the first power source wires and the second power source wires are not in contact.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] At present, in an OLED display screen, light-emitting elements of different colors share a common cathode. However, there is a large difference in voltage requirements between the red light-emitting device and the blue light-emitting device, and between the green light-emitting device and the blue light-emitting device, resulting in an excess of the cross-voltage of the red light-emitting device and the green light-emitting device, increasing the power consumption of the OLED. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a display panel and a display device to solve the problem that the red light-emitting device and the green light-emitting device are prone to excessive cross-voltage and reduce the power consumption of the OLED. The specific technical solutions are as follows:

[0004] In a first aspect of the present application, a display panel is provided. The display panel includes a display area and a wiring area located outside the display area. An array of red light-emitting devices, green light-emitting devices, and blue light-emitting devices is arranged in the display area. A first power supply wiring and a second power supply wiring are arranged in the wiring area. The first power supply wiring is used to supply power to a first cathode corresponding to the red light-emitting device and the green light-emitting device, and the second power supply wiring is used to supply power to a second cathode corresponding to the blue light-emitting device. The first cathode and the second cathode are arranged at intervals. The electric potential of the first power supply wiring is greater than that of the second power supply wiring. The first power supply wiring includes a first main line and a first branch line and a second branch line electrically connected to the first main line. The second power supply wiring includes a second main line and a third branch line and a fourth branch line electrically connected to the second main line. The first main line and the second main line are located in the wiring area and are arranged in a loop shape. The first branch line and the third branch line are arranged at intervals along a second direction and penetrate through the display area along a first direction. The second branch line and the fourth branch line are arranged at intervals along the first direction and penetrate through the display area along the second direction. The first direction and the second direction are the long side direction and the short side direction of the display panel respectively, and the first power supply wiring and the second power supply wiring do not contact each other.

[0005] In addition, the display panel provided in the first aspect of the present application may further have the following technical features:

[0006] In some embodiments, the first branch line and the third branch line are arranged on the same layer, the second branch line and the fourth branch line are arranged on the same layer, and the first branch line and the second branch line are arranged on different layers; the first branch line and the second branch line have a plurality of first cross points on different layers, and the first branch line is electrically connected through a first via at the position of the first cross point on different layers. The third branch line and the fourth branch line have a plurality of second cross points on different layers, and the third branch line and the fourth branch line are electrically connected through a second via at the position of the second cross point on different layers.

[0007] In some embodiments, the display panel includes a substrate and a first conductive layer, a first planar layer, a second conductive layer, and a second planar layer sequentially arranged in a direction away from the substrate; the first branch line and the third branch line are located in the first conductive layer or the second conductive layer, and the second branch line and the fourth branch line are located in the second conductive layer or the first conductive layer; the first main line includes a first portion arranged along the second direction and a second portion arranged along the first direction, and the second main line includes a third portion arranged along the second direction and a fourth portion arranged along the fourth direction. The first portion and the third portion are arranged on the same layer and are arranged on the same layer as the second branch line and the fourth branch line. The fourth portion is arranged on the same layer as the first branch line and the third branch line, and the second portion is arranged on the same layer as the first branch line and the third branch line or on the same layer as the second branch line and the fourth branch line; the first portion is electrically connected to the first branch line through a third via, and the second portion is electrically connected to the second branch line through a fourth via or the second portion is directly electrically connected to the second branch line.

[0008] In some embodiments, the first portion includes a first segment overlapping with the first branch line and a second segment not overlapping with the first branch line. The second segment further includes a first cushion layer. The first planar layer is provided with a fifth via penetrating the first planar layer in the thickness direction of the display panel, and the first cushion layer overlaps with the second segment through the fifth via; and / or, the second portion further includes a third segment overlapping with the second branch line and a fourth segment not overlapping with the second branch line. The fourth segment further includes a second cushion layer. The first planar layer is provided with a sixth via penetrating the first planar layer in the thickness direction of the display panel, and the second cushion layer overlaps with the fourth segment through the sixth via.

[0009] In some embodiments, the fifth via and the third via are communicated into one hole in a direction perpendicular to the thickness direction of the display panel, and the sixth via and the fourth via are communicated into one hole in a direction perpendicular to the thickness direction of the display panel.

[0010] In some embodiments, the display panel includes a substrate substrate, a first conductive layer, a first planar layer, a second conductive layer, and a second planar layer sequentially arranged in a direction away from the substrate substrate; the first branch line and the third branch line are located in the first conductive layer or the second conductive layer, and the second branch line and the fourth branch line are located in the second conductive layer or the first conductive layer; the first main line includes a first portion arranged along the second direction and a second portion arranged along the first direction, the second main line includes a third portion arranged along the second direction and a fourth portion arranged along the fourth direction, the first portion and the third portion are arranged in different layers, the second portion and the fourth portion are arranged in different layers, and the first portion, the fourth portion are in the same layer as the first branch line and the third branch line, and the second portion, the third portion are in the same layer as the second branch line and the fourth branch line; the first portion is directly connected to the first branch line, and the second portion is directly connected to the second branch line.

[0011] In some embodiments, the first portion further includes a first additional layer, the first planar layer includes a seventh via hole penetrating the first planar layer in the thickness direction of the display panel, and the first additional layer is overlapped with the first portion through the seventh via hole, or the second portion further includes a second additional layer, the first planar layer includes an eighth via hole penetrating the first planar layer in the thickness direction of the display panel, and the second additional layer is overlapped with the second portion through the eighth via hole.

[0012] In some embodiments, the red light-emitting devices and the green light-emitting devices are arranged in an array along the first direction, and the first power trace is electrically connected to the first cathode and the second power trace is electrically connected to the second cathode along the first direction; or, the red light-emitting devices and the green light-emitting devices are arranged in an array along the second direction, and the first power trace is electrically connected to the first cathode and the second power trace is electrically connected to the second cathode along the second direction.

[0013] In some embodiments, the first branch line and the third branch line are alternately arranged; and / or the second branch line and the fourth branch line are alternately arranged.

[0014] In some embodiments, an isolation column is provided between the first cathode and the second cathode, and a cross-section of the isolation column in the thickness direction of the display panel is an inverted trapezoidal structure, so that the isolation column disconnects the first cathode and the second cathode.

[0015] In some embodiments, the first cathode and the second cathode are formed by a fine metal mask or by patterned etching.

[0016] In some embodiments, the display panel includes a substrate substrate, and a first conductive layer, a first planar layer, a second conductive layer, a second planar layer, and a third conductive layer sequentially disposed in a direction away from the substrate substrate. The first main line includes a first portion disposed along the second direction and a second portion disposed along the first direction. The second main line includes a third portion disposed along the second direction and a fourth portion disposed along the first direction. The second portion, the first branch line, and the third branch line, the second branch line, and the fourth branch line are respectively located in one of the first conductive layer, the second conductive layer, and the third conductive layer. The first portion is disposed on the same layer as the first branch line and the third branch line, and the second main line, the second branch line, and the fourth branch line are disposed on the same layer.

[0017] In a second aspect of the present application, a display device is provided, and the display device includes the display panel described above.

[0018] Advantages of the embodiments of the present invention:

[0019] The display panel and the display device provided by the embodiments of the present invention set the power supply traces as two, namely a first power supply trace and a second power supply trace. The first power supply trace is electrically connected to the first cathode to supply power to the red light-emitting device and the green light-emitting device, and the second power supply trace is electrically connected to the second cathode to supply power to the blue light-emitting device. Through the above settings, the voltages of the red light-emitting device and the green light-emitting device can be controlled separately and do not have to be the same as the voltage of the blue light-emitting device. Therefore, the voltages of the red light-emitting device and the green light-emitting device can be reduced, thereby solving the problem that the red light-emitting device and the green light-emitting device are prone to overvoltage, and reducing the power consumption of the OLED.

[0020] Of course, it is not necessary for any product or method implementing the present invention to achieve all the above advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other embodiments based on these drawings.

[0022] Figure 1 It is a top view of the power supply circuit of the display panel provided by the embodiment of the present application in one embodiment;

[0023] Figure 2 It is a cross-sectional view of the display panel provided by the embodiment of the present application in one embodiment;

[0024] Figure 3For Figure 1 Cross-sectional view of position C in one embodiment;

[0025] Figure 4 For Figure 1 Cross-sectional view of position D in one embodiment;

[0026] Figure 5 Top view of the display panel power supply circuit provided by the embodiment of the present application in another embodiment;

[0027] Figure 6 For Figure 1 Cross-sectional view of position A in one embodiment;

[0028] Figure 7 For Figure 1 Cross-sectional view of position B in one embodiment;

[0029] Figure 8 For Figure 1 Cross-sectional view of position B in another embodiment;

[0030] Figure 9 For Figure 1 Cross-sectional view of position B in yet another embodiment;

[0031] Figure 10 For Figure 1 Cross-sectional view of position B in still another embodiment;

[0032] Figure 11 For Figure 1 Cross-sectional view of position E in one embodiment;

[0033] Figure 12 For Figure 1 Cross-sectional view of position E in another embodiment;

[0034] Figure 13 For Figure 1 Cross-sectional view of position F in one embodiment;

[0035] Figure 14 For Figure 1 Cross-sectional view of position G in one embodiment;

[0036] Figure 15 Top view of the display panel power supply circuit provided by the embodiment of the present application in yet another embodiment;

[0037] Figure 16 Top view of the display panel power supply circuit provided by the embodiment of the present application in still another embodiment;

[0038] Figure 17A cross-sectional view of the display panel provided by the embodiment of the present application in another embodiment;

[0039] Figure 18 is Figure 2 a schematic diagram of a preparation method of the display panel in

[0040] Figure 19 is Figure 2 a schematic diagram of another preparation method of the display panel in

[0041] The reference numerals are as follows: display area A1; wiring area A2, substrate 100; active layer 101; first gate insulating layer 102; first gate 103; second gate insulating layer 104; interlayer dielectric insulating layer 105; first conductive layer SD1; source electrode 106a; drain electrode 106b; first planarization layer 107; second conductive layer SD2; second planarization layer 108; pixel definition layer 109; isolation pillar 110; first metal 111; second metal 112; red light-emitting device 200; green light-emitting device 300; blue light-emitting device 400; first power supply trace 500; first main line 501; first part 5011; first section 5011a; second section 5011b; first cushion layer 5011c; first additional layer 5011d; second part 5012; second additional layer 5012a; first branch line 502; second branch line 503; first hetero-layer crossing point 504; third via 505; second power supply trace 600; second main line 601; third part 6011; fourth part 6012; third branch line 602; fourth branch line 603; second hetero-layer crossing point 604; fourth via 605; anode P; second anode P2; third anode P3; cathode N; first cathode N1; second cathode N2; fine metal mask M; backplane BF; first direction X; second direction Y, thickness direction H. Detailed Embodiments

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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 the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art based on the present application belong to the scope of protection of the present invention.

[0043] The first aspect of the embodiment of the present application provides a display panel, such as Figure 1 , Figure 2As shown, the display panel includes a display area A1 and a wiring area A2 located outside the display area A1. In the display area A1, red light-emitting devices 200, green light-emitting devices 300, and blue light-emitting devices 400 are arranged in an array. In the wiring area A2, a first power supply line 500 and a second power supply line 600 are provided. The first power supply line 500 is used to supply power to the first cathodes N1 corresponding to the red light-emitting devices 200 and the green light-emitting devices 300, and the second power supply line 600 is used to supply power to the second cathodes N2 corresponding to the blue light-emitting devices 400. The first cathodes N1 and the second cathodes N2 are arranged at intervals, and the electric potential of the first power supply line 500 is greater than that of the second power supply line 600. The first power supply line 500 includes a first main line 501, a first branch line 502, and a second branch line 503 that are electrically connected to the first main line 501. The second power supply line 600 includes a second main line 601, a third branch line 602, and a fourth branch line 603 that are electrically connected to the second main line 601. The first main line 501 and the second main line 601 are located in the wiring area A2 and are arranged in a loop shape. The first branch line 502 and the third branch line 602 are arranged at intervals along the second direction Y and penetrate the display area A1 along the first direction X. The second branch line 503 and the fourth branch line 603 are arranged at intervals along the first direction X and penetrate the display area A1 along the second direction Y. The first direction X and the second direction Y are the long side direction and the short side direction of the display panel respectively, and the first power supply line 500 and the second power supply line 600 do not contact each other.

[0044] In this embodiment, by setting the power supply lines to two, namely the first power supply line 500 and the second power supply line 600, where the first power supply line 500 is electrically connected to the first cathodes N1 to supply power to the red light-emitting devices 200 and the green light-emitting devices 300, and the second power supply line 600 is electrically connected to the second cathodes N2 to supply power to the blue light-emitting devices 400. Through the above settings, the voltages of the red light-emitting devices 200 and the green light-emitting devices 300 can be controlled separately and do not have to be the same as the voltage of the blue light-emitting devices 400. Therefore, the voltages of the red light-emitting devices 200 and the green light-emitting devices 300 can be reduced, thus solving the problem that the red light-emitting devices 200 and the green light-emitting devices 300 are prone to overvoltage, and reducing the power consumption of the OLED.

[0045] Among them, the first main line 501 of the first power supply line 500 is arranged in a loop shape in the peripheral area, and the second main line 601 of the second power supply line 600 is also arranged in a loop shape in the peripheral area. It is acceptable that the first main line 501 surrounds the second main line 601 or the second main line 601 surrounds the first main line 501. This application does not limit this, and this application only takes the first main line 501 surrounding the second main line 601 as an example for illustration. The first power supply line 500 and the second power supply line 600 do not contact each other to prevent signal crosstalk or short-circuit defects.

[0046] It should be noted that, in order to achieve the independence of the routing between the first power trace 500 and the second power trace 600, the first power trace 500 and the second power trace 600 can be arranged in conductive layers that are spaced apart in multiple layers. For example, they can be arranged in two conductive layers, three conductive layers, or even more conductive layers. However, as the number of conductive layers increases, the complexity of the routing also increases, and it will cause the thickness of the display panel to exceed the standard. Feasibly, the first power trace 500 and the second power trace 600 can be arranged in two or three conductive layers. The following will be explained one by one in combination with specific embodiments.

[0047] Optionally, as Figure 1 shown, the first branch line 502 and the third branch line 602 are arranged on the same layer, the second branch line 503 and the fourth branch line 603 are arranged on the same layer, and the first branch line 502 and the second branch line 503 are arranged on different layers; the first branch line 502 and the second branch line 503 have a plurality of first different-layer crossing points 504, and the first branch line 502 is connected through a first via at the position of the first different-layer crossing point 504. The third branch line 602 and the fourth branch line 603 have a plurality of second different-layer crossing points 604, and the third branch line 602 and the fourth branch line 603 are connected through a second via at the position of the second different-layer crossing point 604. Specifically, as Figure 3 、 Figure 4 shown, Figure 3 is Figure 1 the cross-sectional view at position C in Figure 4 is Figure 1 the cross-sectional view at position D in . The third branch line 602 and the second branch line 503 cross on different layers at position C, but they are independent of each other and not connected through a via. The third branch line 602 and the fourth branch line 603 cross on different layers at position D and are connected through a second via.

[0048] In the display area A1, the first branch line 502 and the third branch line 602 are arranged on the same layer and at the same interval in the same direction, and the second branch line 503 and the fourth branch line 603 are arranged on the same layer and at the same interval in the same direction, which facilitates the electrical connection between the first power supply line 500 and the second power supply line 600 and the light-emitting devices in the display area A1 through the first branch line 502, the third branch line 602, or through the second branch line 503 or the fourth branch line 603, without the need for electrical connection through vias, thereby simplifying the wiring difficulty. And the above arrangement makes the first branch line 502, the third branch line 602 and the second branch line 503, the fourth branch line 603 intersect in a staggered layer to form a mesh arrangement. At the first staggered intersection position, the first branch line 502 and the second branch line 503 are connected through the first via, which is beneficial to reducing the voltage drop of the first power supply line 500 in the display area A1, so that the voltage provided by the first power supply line 500 in the display area A1 is equal everywhere; at the second staggered intersection position, the third branch line 602 and the fourth branch line 603 are connected through the second via, which is beneficial to reducing the voltage drop of the second power supply line 600 in the display area A1, so that the voltage provided by the second power supply line 600 in the display area A1 is equal everywhere.

[0049] As an embodiment, the first power supply line 500 and the second power supply line 600 can be arranged in two conductive layers. Optionally, the display panel includes a substrate 100 and a first conductive layer SD1, a first planar layer 107, a second conductive layer SD2, and a second planar layer 108 arranged in sequence along the direction away from the substrate 100; the first branch line 502 and the third branch line 602 are located in the first conductive layer SD1 or the second conductive layer SD2, and the second branch line 503 and the fourth branch line 603 are located in the second conductive layer SD2 or the first conductive layer SD1. The first main line 501 includes a first part 5011 arranged along the second direction Y and a second part 5012 arranged along the first direction X, and the second main line 601 includes a third part 6011 arranged along the second direction Y and a fourth part 6012 arranged along the fourth direction. The first part 5011 and the third part 6011 are arranged on the same layer, and are arranged on the same layer as the second branch line 503 and the fourth branch line 603. The fourth part 6012 is arranged on the same layer as the first branch line 502 and the third branch line 602. The second part 5012 is arranged on the same layer as the first branch line 502 and the third branch line 602 or on the same layer as the second branch line 503 and the fourth branch line 603; the first part 5011 is electrically connected to the first branch line 502 through the third via 505, and the second part 5012 is electrically connected to the second branch line 503 through the fourth via 605 or the second part 5012 is directly electrically connected to the second branch line 503.

[0050] Among them Figure 1 The figure shows an embodiment in which the second part 5012 is electrically connected to the second branch line 503 through the fourth via 605. Figure 5An embodiment in which the second part 5012 is directly electrically connected to the second branch line 503, that is, there is no need to connect through vias. In addition, it should be noted that Figure 1 In Figure 1 , the third part 6011 and the third branch line 602 are also connected through vias, and the fourth part 6012 and the fourth branch line 603 are also connected through vias. The vias are shown as the dotted boxes in the figure.

[0051] The first flat layer 107 is used to insulate and separate the first conductive layer SD1 and the second conductive layer SD2, and the second flat layer 108 is used to insulate the second conductive layer SD2. In this embodiment, the first branch line 502 and the third branch line 602 can be arranged in the first conductive layer SD1, and the second branch line 503 and the fourth branch line 603 can be arranged in the second conductive layer SD2. Alternatively, the first branch line 502 and the third branch line 602 can be arranged in the second conductive layer SD2, and the second branch line 503 and the fourth branch line 603 can be arranged in the first conductive layer SD1. This application does not make any restrictions on this.

[0052] Taking the example that the first branch line 502 and the third branch line 602 are arranged in the first conductive layer SD1 for illustration, as Figure 6 、 Figure 7 shown, Figure 6 is Figure 1 the cross-sectional view at position A in Figure 1 , Figure 7 is Figure 1 the cross-sectional view at position B in Figure 1 . In Figure 6 、 Figure 7 , the first part 5011 and the third part 6011 are arranged on the same layer, that is, both the first part 5011 and the third part 6011 are arranged in the second conductive layer SD2. Therefore, as Figure 6 shown, the first part 5011 and the first branch line 502 are connected through the third via 505. As Figure 7 shown, the third part 6011 and the third branch line 602 are also connected through vias. The second part 5012 can be arranged on the same layer as the first branch line 502 and the third branch line 602, or can be arranged on the same layer as the second branch line 503 or the fourth branch line 603, that is, the second part 5012 can be located in the first conductive layer SD1 or the second conductive layer SD2. Therefore, the second part 5012 and the second branch line 503 can be connected through the fourth via 605 or directly connected. The fourth part 6012 is arranged on the same layer as the first branch line 502 and the third branch line 602. Therefore, the fourth part 6012 and the fourth branch line 603 are connected through vias.

[0053] In this embodiment, the first part 5011 and the third part 6011, and the second part 5012 and the fourth part 6012 can be arranged in the same layer in pairs, or the first part 5011, the second part 5012 and the third part 6011 are arranged in the same layer, and the fourth part 6012 is arranged in a different layer from them. Through the above changes, the first conductive layer SD1 and the second conductive layer SD2 can be reasonably utilized, so that the first power supply trace 500 and the second power supply trace 600 have a variety of wiring methods, and the wiring methods of the first power supply trace 500 and the second power supply trace 600 can be flexibly selected according to the actual situation. At the same time, arranging the first power supply trace 500 and the second power supply trace 600 in two conductive layers can reduce the number of conductive layers provided, which is beneficial to reducing the thickness of the display panel.

[0054] For the embodiment in which the first part 5011 and the first branch 502, and the second part 5012 and the second branch 503 are connected through vias, for example Figure 6 the embodiment shown, combined with Figure 6 、 Figure 7 、 Figure 8 shown, the first part 5011 includes a first section 5011a that overlaps with the first branch 502 and a second section 5011b that does not overlap with the first branch 502. As Figure 8 shown, the second section 5011b further includes a first cushion layer 5011c. The first planarization layer 107 is provided with a fifth via that penetrates the first planarization layer 107 in the thickness direction H of the display panel, and the first cushion layer 5011c overlaps with the second section 5011b through the fifth via; and / or, the second part 5012 further includes a third section that overlaps with the second branch 503 and a fourth section that does not overlap with the second branch 503. The fourth section further includes a second cushion layer. The first planarization layer 107 is provided with a sixth via that penetrates the first planarization layer 107 in the thickness direction H of the display panel, and the second cushion layer overlaps with the fourth section through the sixth via.

[0055] Taking the example that the first branch 502 and the third branch 602 are located in the first conductive layer SD1, the second branch 503 and the fourth branch 603 are located in the second conductive layer SD2, the first part 5011 and the third part 6011 are located in the second conductive layer SD2, and the second part 5012 and the fourth part 6012 are located in the first conductive layer SD1, the first part 5011 and the first branch 502 are electrically connected through a third via 505, that is, the first planarization layer 107 is provided with a third via 505 that penetrates the first planarization layer 107 in the thickness direction H of the display panel. The first part 5011 overlaps with the first branch 502 through the third via 505, and the overlapping part is the first section 5011a, and the non-overlapping part is the second section 5011b. As Figure 7 shown. In this embodiment, as Figure 8As shown in the figure, for the non-overlapping part, double-layer routing is adopted. That is, the first flat layer 107 is provided with a fifth via hole penetrating the first flat layer 107 along the thickness direction H of the display panel. The first cushion layer 5011c is located in the fifth via hole and is arranged on the same layer as the first conductive layer SD1. Then, a second section 5011b, that is, a second conductive layer SD2, is continuously arranged above the first conductive layer SD1, thereby forming double-layer routing. This is beneficial to reducing the voltage drop of the first part 5011 of the first main line 501.

[0056] Similarly, the second part 5012 and the second branch line 503 are electrically connected through a fourth via hole 605. That is, the first flat layer 107 is provided with a fourth via hole 605 penetrating the first flat layer 107 along the thickness direction H of the display panel. The second part 5012 is overlapped with the second branch line 503 through the fourth via hole 605. The overlapped part is the first section 5011a, and the non-overlapped part is the second section 5011b. In this embodiment, for the non-overlapped part, double-layer routing is adopted. That is, the first flat layer 107 is provided with a sixth via hole penetrating the first flat layer 107 along the thickness direction H of the display panel. The second cushion layer is located in the sixth via hole and is arranged on the same layer as the first section 5011a in the fourth via hole 605. The second cushion layer and the second section 5011b below it form double-layer routing. This is beneficial to reducing the voltage drop of the second part 5012 of the first main line 501.

[0057] In some embodiments, the fifth via hole and the third via hole 505 are connected along a direction perpendicular to the thickness direction H of the display panel to form a single hole. The sixth via hole and the fourth via hole 605 are connected along a direction perpendicular to the thickness direction H of the display panel to form a single hole.

[0058] Connecting the fifth via hole and the third via hole 505 to form a single hole can simplify the manufacturing process by one process. Similarly, the sixth via hole and the fourth via hole 605 can also be manufactured by one process to simplify the manufacturing process.

[0059] As another embodiment, the first power supply routing 500 and the second power supply routing 600 are still arranged in two conductive layers. Still on the premise that the first branch line 502 and the third branch line 602 are arranged on the same layer, and the second branch line 503 and the fourth branch line 603 are arranged on the same layer, the difference is that the first part 5011 and the third part 6011 are not arranged on the same layer but on different layers. This embodiment still takes Figure 1 the sectional view at position B in Figure 9 as an example for illustration, as

[0060] In this embodiment, the first part 5011 and the third part 6011 are arranged on different layers, the second part 5012 and the fourth part 6012 are arranged on different layers, and the first part 5011, the fourth part 6012 are on the same layer as the first branch line 502 and the third branch line 602, and the second part 5012, the third part 6011 are on the same layer as the second branch line 503 and the fourth branch line 603. As Figure 9 shown, the first part 5011 is arranged on the first conductive layer SD1, the third part 6011 is arranged on the second conductive layer SD2, the first part 5011 is directly connected to the first branch line 502, and the second part 5012 is directly connected to the second branch line 503.

[0061] In this embodiment, the first part 5011 and the first branch line 502, the second part 5012 and the second branch line 503 do not need to be connected through vias, which can further simplify the design difficulty of the first power supply trace 500 and the second power supply trace 600.

[0062] Optionally, for Figure 9 the embodiment shown, the first part 5011 further includes a first additional layer 5011d, the first flat layer 107 includes a seventh via hole penetrating the first flat layer 107 along the thickness direction H of the display panel, and the first additional layer 5011d is overlapped with the first part 5011 through the seventh via hole, or the second part 5012 further includes a second additional layer 5012a, the first flat layer 107 includes an eighth via hole penetrating the first flat layer 107 along the thickness direction H of the display panel, and the second additional layer 5012a is overlapped with the second part 5012 through the eighth via hole.

[0063] Taking the first branch line 502 and the third branch line 602 being located on the first conductive layer SD1, the second branch line 503 and the fourth branch line 603 being located on the second conductive layer SD2, the first part 5011 and the fourth part 6012 being located on the first conductive layer SD1, and the second part 5012 and the third part 6011 being located on the second conductive layer SD2 as an example, and still taking Figure 1 the position B in Figure 10 shown, the first part 5011 of the first power supply trace 500 is located on the first conductive layer SD1, the third part 6011 of the second power supply trace 600 is located on the second conductive layer SD2. When Figure 8 the fifth via hole and the third via hole 505 in the embodiment are connected into one hole, and Figure 10The difference between the illustrated embodiments lies only in the position of the first part 5011. That is, whether the first part 5011 is arranged on the same layer as the first branch line 502 or on a different layer, the first part 5011 can adopt double-layer routing. Finally, the cross-sectional views of the double-layer routing at position B are the same in structure, only the position of the first part 5011 is different. By adding the first additional layer 5011d to set the routing of the first part 5011 as double-layer routing, the voltage drop of the first part 5011 of the first power supply routing 500 can be reduced.

[0064] As Figure 11 shown, Figure 11 for Figure 1 the cross-sectional view at position E in Figure 11 which, the second part 5012 can adopt single-layer routing. As

[0065] shown, Figure 12 the second part 5012 is located in the second conductive layer SD2, the second part 5012 is directly connected to the second branch line 503, the fourth part 6012 is located in the first conductive layer SD1, and the fourth part 6012 is connected to the fourth branch line 603 through a via.

[0066] For Figure 1 the cross-sectional view at position F in Figure 13 which, this embodiment schematically shows that the first part 5011 of the first power supply routing 500 is located in the first conductive layer SD1 and the second part 5012 is located in the second conductive layer SD2. At the position of the square-turn inflection point of the first power supply routing 500, the first part 5011 and the second part 5012 are connected through a via. Of course, the first part 5011 and the second part 5012 can be located in the same conductive layer, then the first part 5011 and the second part 5012 do not need to be connected through a via. For Figure 1 the cross-sectional view at position G in Figure 14 which, the second part 5012 and the fourth part 6012 are both located in the second conductive layer SD2 and are arranged on the same layer. Of course, the second part 5012 can also be arranged on a different layer from the fourth part 6012, with the second part 5012 located in the first conductive layer SD1 and the fourth part 6012 located in the second conductive layer SD2.

[0067] As Figure 1 ,Figure 5 , Figure 15 As shown, the red light-emitting devices 200 and the green light-emitting devices 300 are arranged in an array along the first direction X, and the first power supply trace 500 is electrically connected to the first cathode N1, and the second power supply trace 600 is electrically connected to the second cathode N2 along the first direction X; or, as Figure 16 shown, the red light-emitting devices 200 and the green light-emitting devices 300 are arranged in an array along the second direction Y, and the first power supply trace 500 is electrically connected to the first cathode N1, and the second power supply trace 600 is electrically connected to the second cathode N2 along the second direction Y. As Figures 6 - 10 is a cross-sectional view of the trace area A2. The anode P and the cathode N do not directly correspond to the light-emitting devices. Therefore, the anode P is not distinguished into the first anode, the second anode P2, and the third anode P3, and the cathode N is not distinguished into the first cathode N1 and the second cathode N2.

[0068] In this embodiment, a suitable connection method can be selected according to the specific arrangement of the red light-emitting devices 200, the green light-emitting devices 300, and the blue light-emitting devices 400. For example, Figure 15 as shown in the arrangement, it is more reasonable to select the first direction X for connection. For example, Figure 16 as shown in the arrangement, it is more reasonable to select the second direction Y for connection.

[0069] It should be noted that Figure 15 the black wavy line extending along the first direction in is the position where the cathode is disconnected.

[0070] In the above embodiments, as Figure 2 shown, the red light-emitting device 200 further includes a first anode (not shown in the figure), the green light-emitting device 300 further includes a second anode P2, the blue light-emitting device 400 further includes a third anode P3, the display panel further includes a pixel definition layer 109, the pixel definition layer 109 includes a plurality of pixel openings, and the red light-emitting devices 200, the green light-emitting devices 300, and the blue light-emitting devices 400 are all disposed in the pixel openings and are respectively electrically connected to the first anode, the second anode P2, and the third anode P3 through one end of the pixel opening, and the other end is electrically connected to the first cathode N1 and the second cathode N2. As Figure 2 , Figure 17As shown, the display panel further includes thin film transistors for controlling the red light emitting device 200, the green light emitting device 300, and the blue light emitting device 400. The thin film transistors include an active layer 101 disposed on one side of the substrate 100, a first gate 103, and a source 106a and a drain 106b electrically connected to the active layer 101. The active layer 101 is disposed on one side of the substrate 100. A first gate insulating layer 102 is provided between the active layer 101 and the first gate 103. The source 106a and the drain 106b are located in the first conductive layer SD1. The drain 106b of the thin film transistor is transferred through the second conductive layer SD2 to the anode P (including the first anode, the second anode P2, and the third anode P3). The display panel further includes a storage capacitor. The storage capacitor includes a first metal 111 on the same layer as the first gate 103 and a second metal 112 disposed at an interval from the first metal 111. A second gate insulating layer 104 is provided between the first gate 103 and the second metal 112. A dielectric interlayer insulating layer 105 is provided on the side of the second metal 112 away from the substrate 100. The substrate 100 on which the thin film transistors are provided can be referred to as a backplane BF, as Figure 3 , Figure 4 and Figures 6 - 14 In the figure, the structure of the thin film transistor is omitted, and the bottom layer is the backplane BF with thin film transistors.

[0071] Optionally, the first branch line 502 and the third branch line 602 are alternately arranged; and / or the second branch line 503 and the fourth branch line 603 are alternately arranged.

[0072] Preferably, as Figure 1 , Figure 5 , Figure 15 and Figure 16 shown, the first branch line 502 and the third branch line 602 are alternately arranged, and at the same time, the second branch line 503 and the fourth branch line 603 are also alternately arranged. In this way, it is beneficial to establish a one-to-one correspondence relationship for the red light emitting device 200, the green light emitting device 300, and the blue light emitting device 400, so as to supply power to each device separately, and the wiring difficulty of the first power supply line 500 and the second power supply line 600 can be simplified.

[0073] Regarding the spaced arrangement of the first cathode N1 and the second cathode N2, as Figure 17 shown, in some embodiments, an isolation column 110 is provided between the first cathode N1 and the second cathode N2. The cross-section of the isolation column 110 along the thickness direction H of the display panel is an inverted trapezoidal structure, so that the isolation column 110 disconnects the first cathode N1 and the second cathode N2.

[0074] Before forming the first cathode N1 and the second cathode N2, an isolation column 110 is formed. The inverted trapezoidal structure of the isolation column 110 generates an eaves fault effect, so that during the deposition of the cathode N, the first cathode N1 and the second cathode N2 can be separated by the isolation column 110. The manufacturing process of the first cathode N1 and the second cathode N2 is simplified.

[0075] Among them, the inverted trapezoid specifically refers to a trapezoid with an upper base size larger than the lower base size.

[0076] Optionally, the first cathode N1 and the second cathode N2 can also be obtained through a fine metal mask plate M, as Figure 18 shown, or obtained through patterned etching, as Figure 19 shown.

[0077] As another embodiment, the first power supply line 500 and the second power supply line 600 are arranged in three conductive layers. Optionally, the display panel includes a substrate 100 and a first conductive layer SD1, a first planar layer 107, a second conductive layer SD2, a second planar layer 108, and a third conductive layer sequentially arranged in a direction away from the substrate 100. The first main line 501 includes a first part 5011 arranged along the second direction Y and a second part 5012 arranged along the first direction X. The second main line 601 includes a third part 6011 arranged along the second direction Y and a fourth part 6012 arranged along the first direction X. The second part 5012, the first branch line 502, and the third branch line 602, the second branch line 503, and the fourth branch line 603 are respectively located in one of the first conductive layer SD1, the second conductive layer SD2, and the third conductive layer. The first part 5011 is arranged on the same layer as the first branch line 502 and the third branch line 602, and the second main line 601 and the second branch line 503 and the fourth branch line 603 are arranged on the same layer.

[0078] Specifically, the second part 5012, the first branch line 502 and the third branch line 602, and the second branch line 503 and the fourth branch line 603 are respectively located in one of the first conductive layer SD1, the second conductive layer SD2, and the third conductive layer, including the following situations: (1) The second part 5012 is located in the first conductive layer SD1, the first branch line 502 and the third branch line 602 are located in the second conductive layer SD2, and the second branch line 503 and the fourth branch line 603 are located in the third conductive layer; (2) The second part 5012 is located in the first conductive layer SD1, the first branch line 502 and the third branch line 602 are located in the third conductive layer, and the second branch line 503 and the fourth branch line 603 are located in the second conductive layer SD2; (3) The second part 5012 is located in the second conductive layer SD2, the first branch line 502 and the third branch line 602 are located in the first conductive layer SD1, and the second branch line 503 and the fourth branch line 603 are located in the third conductive layer; (4) The second part 5012 is located in the second conductive layer SD2, the first branch line 502 and the third branch line 602 are located in the third conductive layer, and the second branch line 503 and the fourth branch line 603 are located in the second conductive layer SD2; (5) The second part 5012 is located in the third conductive layer, the first branch line 502 and the third branch line 602 are located in the first conductive layer SD1, and the second branch line 503 and the fourth branch line 603 are located in the second conductive layer SD2; (6) The second part 5012 is located in the third conductive layer, the first branch line 502 and the third branch line 602 are located in the second conductive layer SD2, and the second branch line 503 and the fourth branch line 603 are located in the first conductive layer SD1.

[0079] By arranging the first power supply trace 500 and the second power supply trace 600 in three conductive layers, the independence between them can be improved, and the possibility of mutual winding can be reduced.

[0080] The second aspect of the present application provides a display device, and the display device includes the display panel described above.

[0081] The display panel included in the display device has two power supply traces. The first power supply trace 500 is electrically connected to the first cathode N1 to supply power to the red light-emitting device 200 and the green light-emitting device 300, and the second power supply trace 600 is electrically connected to the second cathode N2 to supply power to the blue light-emitting device 400. Through the above arrangement, the voltages of the red light-emitting device 200 and the green light-emitting device 300 can be controlled separately and do not have to be the same as the voltage of the blue light-emitting device 400. Therefore, the voltages of the red light-emitting device 200 and the green light-emitting device 300 can be reduced, thereby solving the problem that the red light-emitting device 200 and the green light-emitting device 300 are prone to excessive cross-voltage and reducing the power consumption of the OLED.

[0082] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0083] Each embodiment in this specification is described in a related manner. For the same or similar parts among the embodiments, reference can be made to each other, and the differences between each embodiment and other embodiments are emphasized.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included within the protection scope of the present invention.

Claims

1. A display panel, characterized in that, The display panel includes a display area and a wiring area located around the display area. In the display area, red light-emitting devices, green light-emitting devices, and blue light-emitting devices are arranged in an array. In the wiring area, a first power supply line and a second power supply line are provided. The first power supply line is used to supply power to the first cathodes corresponding to the red light-emitting devices and the green light-emitting devices, and the second power supply line is used to supply power to the second cathodes corresponding to the blue light-emitting devices. The first cathodes and the second cathodes are arranged at intervals, and the electric potential of the first power supply line is greater than that of the second power supply line. The first power supply line includes a first main line and a first branch line and a second branch line electrically connected to the first main line. The second power supply line includes a second main line and a third branch line and a fourth branch line electrically connected to the second main line. The first main line and the second main line are located in the wiring area and are arranged in a loop shape. The first branch line and the third branch line are arranged at intervals along a second direction and penetrate the display area along a first direction. The second branch line and the fourth branch line are arranged at intervals along the first direction and penetrate the display area along the second direction. The first direction and the second direction are the long side direction and the short side direction of the display panel respectively, and the first power supply line and the second power supply line do not contact each other.

2. The display panel according to claim 1, wherein The first branch line and the third branch line are arranged on the same layer, and the second branch line and the fourth branch line are arranged on the same layer. The first branch line and the second branch line are arranged on different layers; the first branch line and the second branch line have a plurality of first different-layer intersection points, and the first branch line is electrically connected through a first via at the position of the first different-layer intersection point. The third branch line and the fourth branch line have a plurality of second different-layer intersection points, and the third branch line and the fourth branch line are electrically connected through a second via at the position of the second different-layer intersection point.

3. The display panel according to claim 2, characterized in that, The display panel includes a substrate and a first conductive layer, a first planarization layer, a second conductive layer, and a second planarization layer sequentially arranged in a direction away from the substrate. The first branch line and the third branch line are located in the first conductive layer or the second conductive layer, and the second branch line and the fourth branch line are located in the second conductive layer or the first conductive layer. The first main line includes a first part arranged along the second direction and a second part arranged along the first direction. The second main line includes a third part arranged along the second direction and a fourth part arranged along the fourth direction. The first part and the third part are arranged on the same layer and are arranged on the same layer as the second branch line and the fourth branch line. The fourth part is arranged on the same layer as the first branch line and the third branch line. The second part is arranged on the same layer as the first branch line and the third branch line or on the same layer as the second branch line and the fourth branch line. The first part is electrically connected to the first branch line through a third via, and the second part is electrically connected to the second branch line through a fourth via or the second part is directly electrically connected to the second branch line.

4. The display panel according to claim 3, wherein The first part includes a first section that overlaps with the first branch line and a second section that does not overlap with the first branch line. The second section further includes a first cushion layer. The first flat layer is provided with a fifth via hole penetrating through the first flat layer in the thickness direction of the display panel, and the first cushion layer overlaps with the second section through the fifth via hole; and / or, the second part further includes a third section that overlaps with the second branch line and a fourth section that does not overlap with the second branch line. The fourth section further includes a second cushion layer. The first flat layer is provided with a sixth via hole penetrating through the first flat layer in the thickness direction of the display panel, and the second cushion layer overlaps with the fourth section through the sixth via hole.

5. The display panel according to claim 4, characterized in that, The fifth via hole and the third via hole are connected as one hole in a direction perpendicular to the thickness direction of the display panel, and the sixth via hole and the fourth via hole are connected as one hole in a direction perpendicular to the thickness direction of the display panel.

6. The display panel according to claim 2, wherein The display panel includes a substrate and a first conductive layer, a first flat layer, a second conductive layer, and a second flat layer sequentially arranged in a direction away from the substrate. The first branch line and the third branch line are located in the first conductive layer or the second conductive layer, and the second branch line and the fourth branch line are located in the second conductive layer or the first conductive layer. The first main line includes a first part arranged in the second direction and a second part arranged in the first direction, and the second main line includes a third part arranged in the second direction and a fourth part arranged in the fourth direction. The first part and the third part are arranged in different layers, and the second part and the fourth part are arranged in different layers. Moreover, the first part and the fourth part are arranged in the same layer as the first branch line and the third branch line, and the second part and the third part are arranged in the same layer as the second branch line and the fourth branch line. The first part is directly connected to the first branch line, and the second part is directly connected to the second branch line.

7. The display panel according to claim 6, wherein The first part further includes a first additional layer. The first flat layer includes a seventh via hole penetrating through the first flat layer in the thickness direction of the display panel, and the first additional layer overlaps with the first part through the seventh via hole. Or, the second part further includes a second additional layer. The first flat layer includes an eighth via hole penetrating through the first flat layer in the thickness direction of the display panel, and the second additional layer overlaps with the second part through the eighth via hole.

8. The display panel according to any one of claims 2-7, characterized in that, The red light-emitting devices and the green light-emitting devices are arranged in an array in the first direction, and the first power trace is electrically connected to the first cathode, and the second power trace is electrically connected to the second cathode in the first direction; or, the red light-emitting devices and the green light-emitting devices are arranged in an array in the second direction, and the first power trace is electrically connected to the first cathode, and the second power trace is electrically connected to the second cathode in the second direction.

9. The display panel according to any one of claims 1-7, characterized in that, The first branch line and the third branch line are arranged alternately; and / or the second branch line and the fourth branch line are arranged alternately.

10. The display panel according to any one of claims 1-7, characterized in that, An isolation column is provided between the first cathode and the second cathode. The cross-section of the isolation column in the thickness direction of the display panel is an inverted trapezoidal structure, so that the isolation column disconnects the first cathode and the second cathode.

11. The display panel according to any one of claims 1-7, characterized in that, The first cathode and the second cathode are formed by a fine metal mask or by patterned etching.

12. The display panel according to claim 2, wherein, The display panel includes a substrate and a first conductive layer, a first planarization layer, a second conductive layer, a second planarization layer, and a third conductive layer sequentially arranged in a direction away from the substrate. The first main line includes a first portion arranged in the second direction and a second portion arranged in the first direction. The second main line includes a third portion arranged in the second direction and a fourth portion arranged in the first direction. The second portion, the first branch line, and the third branch line, the second branch line and the fourth branch line are respectively located in one of the first conductive layer, the second conductive layer, and the third conductive layer. The first portion is arranged on the same layer as the first branch line and the third branch line, and the second main line, the second branch line, and the fourth branch line are arranged on the same layer.

13. A display device, characterized in that, The display device includes the display panel according to any one of claims 1-12.

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