Display panel and display device

Abstract

The present invention discloses a display panel and a display device. The display panel includes a first display area and a second display area. The display panel includes: a substrate, a driving circuit, a light-emitting device and at least two connecting components. The connecting components are used to electrically connect the driving circuit and the light-emitting device. The connecting components include a first connecting component and a second connecting component. The first connecting component and the second connecting component are located in different layers. The first connecting component includes a first transparent conductive layer. The second connecting component includes a second transparent conductive layer and a second resistance-reducing layer arranged in a stacked manner. The resistance of the second resistance-reducing layer is less than the resistance of the second transparent conductive layer. The resistance of the first transparent conductive layer is less than the resistance of the second transparent conductive layer. The second resistance-reducing layer and the second transparent conductive layer are connected in parallel, which reduces the resistance of the second connecting component, reduces the resistance difference between connecting components of different layers, reduces the resistance difference caused by the inconsistent length of the same-layer routing, and improves the display panel. Uneven brightness and other undesirable problems.

Description

Technical Field

[0001] The present invention belongs to the field of display technology, and in particular relates to a display panel and a display device. Background Art

[0002] In order to reduce the impact of the camera on the screen-to-body ratio and achieve a full screen, different manufacturers have developed a variety of solutions from different angles. One technical direction is to dig a through hole in the display panel to form an AA Hole display panel. Another technical direction is to use under-screen camera technology to externalize the driving circuit of the under-screen camera area, leaving only the light-emitting device to maintain a large transmittance of the display panel. However, a transparent trace is required to connect the external driving circuit with the light-emitting device. Since there are many pixels in the under-screen camera area, corresponding to multiple light-emitting devices, it is necessary to set up multiple transparent traces to connect the multiple light-emitting devices with multiple external driving circuits respectively. If multiple transparent traces are set in the same layer, there is a problem of dense traces. In order to improve the problem of dense lines, transparent traces are usually set in different layers, but there are differences in the current signals of different pixels, and there are problems such as uneven brightness of the display and various traces. In addition, the resistance of the trace is also related to the length of the trace. The longer the trace length, the greater the resistance of the trace. When the lengths of the traces in the same layer are different, there will also be problems such as uneven brightness of the display panel and various traces.

[0003] Therefore, it is necessary to improve the existing display panel. Summary of the invention

[0004] The present invention aims to improve at least one of the above-mentioned technical problems at least to some extent.

[0005] In order to improve the above technical problems, the present invention provides a display panel, characterized in that the display panel includes a first display area and a second display area, and the display panel includes: a substrate; a driving circuit, the driving circuit is arranged on one side of the substrate and is located in the first display area; a light-emitting device, the light-emitting device is arranged on a side of the substrate away from the driving circuit and is located in the second display area; at least two connecting components, the connecting components are used to electrically connect the driving circuit and the light-emitting device, and are located between the driving circuit and the light-emitting device in a direction perpendicular to the substrate, in the direction in which the driving circuit is away from the substrate, the connecting components include a first connecting component and a second connecting component, the first connecting component and the second connecting component are located in different layers, the first connecting component is electrically connected to the driving circuit, and the second connecting component is electrically connected to the anode of the light-emitting device, wherein the first connecting component includes a first transparent conductive layer, the second connecting component includes a second transparent conductive layer and a second resistance reducing layer arranged in a stacked manner, the resistance of the second resistance reducing layer is less than the resistance of the second transparent conductive layer, and the resistance of the first transparent conductive layer is less than the resistance of the second transparent conductive layer. Thus, the second transparent conductive layer and the second resistance reduction layer are connected in parallel, and the total resistance of the parallel circuit is smaller than the smallest parallel resistance, so the resistance of the second connection component can be reduced, and the resistance of the first connection component and the second connection component are nearly equal, so the resistance difference between the first connection component and the second connection component set in different layers can be reduced. Since the total resistance of the parallel circuit is smaller than the smallest parallel resistance, after the second resistance reduction layer is set, the resistance of the second connection component after parallel connection is greatly reduced. The present invention can also reduce the resistance difference caused by inconsistent routing lengths of the transparent conductive layer in the same layer, and effectively improve the uneven brightness of the display panel, the presence of various traces and other undesirable problems.

[0006] According to an embodiment of the present invention, the first connection component also includes a first resistance reduction layer stacked with the first transparent conductive layer, the resistance of the first resistance reduction layer is greater than the resistance of the second resistance reduction layer, and the resistance of the first resistance reduction layer is less than the resistance of the first transparent conductive layer. Thus, the first transparent conductive layer and the first resistance reduction layer are connected in parallel, which can reduce the resistance of the first connection component. The resistance of the first transparent conductive layer is less than the resistance of the second transparent conductive layer, and the resistance of the first resistance reduction layer is greater than the resistance of the second resistance reduction layer. The stacked transparent conductive layer and the resistance reduction layer cooperate with each other, which can make the resistance of the first connection component and the second connection component nearly equal, further reducing the resistance difference between the connection components arranged in different layers, and further improving the problems of uneven brightness of the display panel and the presence of various traces.

[0007] According to an embodiment of the present invention, the number of the connection components is N, where N is a positive integer greater than or equal to 4. In the direction in which the drive circuit is away from the base substrate, the connection components sequentially include the N-1th connection component and the Nth connection component, the N-1th connection component and the Nth connection component are located between the first connection component and the second connection component in the direction perpendicular to the base substrate, the N-1th connection component includes the N-1th transparent conductive layer and the N-1th resistance reduction layer stacked, the Nth connection component includes the Nth transparent conductive layer and the Nth resistance reduction layer stacked, the resistance of the N-1th resistance reduction layer is less than the resistance of the N-1th transparent conductive layer, the resistance of the Nth resistance reduction layer is less than the resistance of the Nth transparent conductive layer, and the resistance of the N-1th transparent conductive layer is less than the resistance of the Nth transparent conductive layer. Thus, the resistance difference between the connection components arranged in different layers, including the first connection component, the N-1th connection component, the Nth connection component, and the second connection component, can be further reduced.

[0008] According to an embodiment of the present invention, the resistance of the Nth resistance reduction layer and the resistance of the N-1th resistance reduction layer are both less than the resistance of the first transparent conductive layer. Since the total resistance of the parallel circuit is smaller than the smallest parallel resistance, after the resistance reduction layer with smaller resistance is provided, the resistance of the parallel connection components can be greatly reduced, and the resistance difference of the connection components provided in different layers including the first connection component, the N-1th connection component, the Nth connection component, and the second connection component can be further reduced.

[0009] According to an embodiment of the present invention, the materials of the first transparent conductive layer, the second transparent conductive layer, the N-1th transparent conductive layer and the Nth transparent conductive layer all include ITO, and the materials of the first resistance reducing layer, the second resistance reducing layer, the N-1th resistance reducing layer and the Nth resistance reducing layer all include titanium nitride. ITO and titanium nitride materials have the advantages of being cheap and readily available, and can reduce the production cost of the display panel.

[0010] According to an embodiment of the present invention, the thickness of the first resistance reduction layer is less than the thickness of the second resistance reduction layer, and the thickness of the N-1th resistance reduction layer is less than the thickness of the Nth resistance reduction layer. Since the resistance of the first transparent conductive layer is less than the resistance of the second transparent conductive layer, the resistance of the N-1th transparent conductive layer is less than the resistance of the Nth transparent conductive layer, that is, the resistances of transparent conductive layers of different layers are different. The resistance of the resistance reduction layer is related to the thickness of the resistance reduction layer. The greater the thickness, the smaller the resistance of the resistance reduction layer. The resistance reduction layer is connected in parallel with the transparent conductive layer, and the thickness of the resistance reduction layer located at different layers changes according to the conditions described above, which can reduce the resistance difference of the connection components of different layers including the first connection component, the N-1th connection component, the N connection component, and the second connection component after parallel connection, so that the resistances of the connection components of different layers including the first connection component, the N-1th connection component, the N connection component, and the second connection component are close to equal, further improving the problems of uneven brightness of the display panel and the presence of various traces.

[0011] According to an embodiment of the present invention, the display panel further comprises: a first flat layer, the first flat layer is arranged between the driving circuit and the first connecting component, the first connecting component is electrically connected to the driving circuit through a first through hole penetrating the first flat layer; a second flat layer, the second flat layer is arranged on a side of the first connecting component away from the first flat layer; a third connecting component, the third connecting component is arranged on a surface of the second flat layer away from the first flat layer, and the third connecting component is electrically connected to the first connecting component through a second through hole penetrating the second flat layer; a third flat layer, the third flat layer is arranged between the third connecting component and the second connecting component, the second connecting component is electrically connected to the third connecting component through a third through hole penetrating the third flat layer; a fourth flat layer, the fourth flat layer is arranged between the second connecting component and the anode, the anode is electrically connected to the second connecting component through a fourth through hole penetrating the fourth flat layer; and a pixel defining layer, the pixel defining layer is on a surface of the fourth flat layer away from the base substrate. Thus, the driving circuit and the light-emitting device can be electrically connected through the first connecting component, the third connecting component and the second connecting component arranged in different layers.

[0012] According to an embodiment of the present invention, the orthographic projection of the first through hole on the substrate substrate is located in the first display area, and the orthographic projection of the second through hole on the substrate substrate, the orthographic projection of the third through hole on the substrate substrate, and the orthographic projection of the fourth through hole on the substrate substrate are all located in the second display area. In the first display area, the first connecting component is overlapped with the driving circuit, and in the second display area, the first connecting component is overlapped with the anode of the light-emitting device through the third connecting component and the second connecting component.

[0013] According to an embodiment of the present invention, the orthographic projection of the first through hole on the substrate substrate and the orthographic projection of the second through hole on the substrate substrate are both located in the first display area, and the orthographic projection of the third through hole on the substrate substrate and the orthographic projection of the fourth through hole on the substrate substrate are both located in the second display area. In the first display area, the third connecting component is connected to the driving circuit through the first connecting component; in the second display area, the third connecting component is connected to the anode of the light-emitting device through the second connecting component.

[0014] According to an embodiment of the present invention, the orthographic projection of the first through hole on the substrate substrate, the orthographic projection of the second through hole on the substrate substrate, and the orthographic projection of the third through hole on the substrate substrate are all located in the first display area, and the orthographic projection of the fourth through hole on the substrate substrate is located in the second display area. In the first display area, the second connecting component is connected to the driving circuit through the first connecting component and the third connecting component; in the second display area, the second connecting component is directly connected to the anode of the light-emitting device.

[0015] The present invention also provides a display device, comprising: the display panel as described above; an under-screen camera, wherein the orthographic projection of the under-screen camera on the display panel overlaps with the second display area. Thus, the display device has all the features and advantages of the display panel as described above, which will not be repeated here. In general, the stacked resistance reduction layer can be connected in parallel with the transparent conductive layer to reduce the resistance of the connecting component, and can reduce the resistance difference between the connecting components arranged in different layers, so that the resistance of the connecting components in different layers is nearly equal. Moreover, the total resistance of the parallel circuit is smaller than the smallest parallel resistance. After the resistance reduction layer is provided, the total resistance after parallel connection is greatly reduced, which can reduce the resistance difference caused by inconsistent routing lengths of the transparent conductive layer in the same layer, thereby improving the display panel. Uneven brightness, various traces and other undesirable problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a top view of the display panel;

[0017] Figure 2 is a schematic structural diagram of a display panel in one embodiment of the present invention;

[0018] Figure 3 is a structural schematic diagram of a display panel in another embodiment of the present invention;

[0019] Figure 4 is a structural schematic diagram of a display panel in another embodiment of the present invention;

[0020] Figure 5 is a structural schematic diagram of a display panel in another embodiment of the present invention;

[0021] Figure 6 is a structural schematic diagram of a display panel in another embodiment of the present invention;

[0022] Figure 7 is a schematic structural diagram of a display device in one embodiment of the present invention;

[0023] Figure 8 is a structural schematic diagram of a display device in another embodiment of the present invention;

[0024] Fig. 9 It is a schematic structural diagram of a display device in another embodiment of the present invention.

[0025] Description of Reference Numerals

[0026] 1000-display panel, A-first display area, B-second display area, 100-substrate, 200-driving circuit, 210-gate, 220-first insulating layer, 230-active layer, 240-second insulating layer, 250-source, 260-drain, 300-light-emitting device, 310-anode, 320-light-emitting layer, 330-cathode, 400-connecting component, 410-first connecting component, 411-first transparent conductive layer, 412-first resistance reduction layer, 430-second connecting component, 431-second transparent conductive layer, 432-second resistance reduction layer, 420-third connecting component, 421-third transparent conductive layer, 422-third resistance reduction layer, 500-first flat layer, 600-second flat layer, 700-third flat layer, 800-fourth flat layer, 900-pixel defining layer, 2000-under-screen camera. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in this area or the product specifications are used. The reagents used are conventional products that can be purchased from the market if the manufacturer is not specified.

[0028] refer to Figure 1, the under-screen camera area of ​​the display panel needs to be compatible with high transmittance and display functions. There can be multiple pixels in the second display area B, and each pixel is provided with a light-emitting device 300. There cannot be a large-area driving circuit 200 in the second display area B, and the driving circuit 200 needs to be externalized. It is necessary to use a transparent electrode wiring to connect the driving circuit 200 with the light-emitting device 300. Since the display panel includes multiple driving circuits 200 and multiple light-emitting devices 300, it is necessary to set up multiple transparent electrode wirings. If multiple transparent electrode wirings are set on the same layer, there is a problem of dense wiring. Generally, multiple transparent electrode wirings are set in different layers. The inventor found that there are resistance differences in multiple transparent electrode wirings set in different layers, and there are problems such as uneven brightness of the display panel and various traces. In addition, the resistance of the transparent electrode wiring is also related to the wiring length. The longer the wiring length, the greater the resistance of the wiring. When the lengths of the transparent electrode wirings in the same layer are different, there will also be problems such as uneven brightness of the display panel and various traces.

[0029] In order to improve the above technical problems, the present invention provides a display panel, referring to Figure 2The display panel includes a first display area A and a second display area B, and the display panel includes a base substrate 100, a driving circuit 200, a light-emitting device 300 and at least two connecting components; the driving circuit 200 is arranged on one side of the base substrate 100 and is located in the first display area A; the light-emitting device 300 is arranged on a side of the base substrate 100 away from the driving circuit 200 and is located in the second display area B; the connecting component 400 is used to electrically connect the driving circuit 200 and the light-emitting device 300, and is located between the driving circuit 200 and the light-emitting device 300 in a direction perpendicular to the base substrate 100. The connection component 400 includes a first connection component 410 and a second connection component 430, the first connection component 410 and the second connection component 430 are located in different layers, the first connection component 410 is electrically connected to the driving circuit 200, and the second connection component 430 is electrically connected to the anode 310 of the light-emitting device 300, wherein the first connection component 410 includes a first transparent conductive layer 411, and the second connection component 430 includes a second transparent conductive layer 431 and a second resistance reduction layer 432 arranged in a stacked manner, the resistance of the second resistance reduction layer 432 is less than the resistance of the second transparent conductive layer 431, and the resistance of the first transparent conductive layer 411 is less than the resistance of the second transparent conductive layer 431. Thus, the second resistance reduction layer 432 can be connected in parallel with the second transparent conductive layer 431 to reduce the resistance difference between the second transparent conductive layer 431 and the first transparent conductive layer 411, so that the resistance of the first connection component 410 and the second connection component 430 is close to equal, which can effectively reduce the resistance difference between the connection components arranged in different layers. Since the total resistance of the parallel circuit is smaller than the smallest parallel resistance, after the second resistance reducing layer 432 is provided, the total resistance after parallel connection is greatly reduced. Although the inconsistent wiring lengths of the transparent conductive layers on the same layer will still result in different total resistances, the difference in total resistance is greatly reduced, and the difference has almost no effect on the display panel. That is, the present invention can also reduce the resistance difference caused by inconsistent wiring lengths of the transparent conductive layers on the same layer, thereby improving the uneven brightness of the display panel, the presence of various traces and other undesirable problems.

[0030] According to an embodiment of the present invention, the light emitting device 300 further includes a light emitting layer 320 and a cathode 330. The light emitting layer 320 is located on a side of the anode 310 away from the substrate 100, and the cathode 330 is located on a side of the light emitting layer 320 away from the anode 310. In other embodiments, the light emitting device 300 may further include structures such as an electron transport layer, an electron injection layer, a hole transport layer, and a hole injection layer.

[0031] The driving circuit 200 includes a gate 210, a first insulating layer 220, an active layer 230, a second insulating layer 240, a source 250 and a drain 260. The gate 210 is located on one side of the substrate 100, the first insulating layer 220 is located on the side of the gate 210 away from the substrate 100, the active layer 230 is located on the side of the first insulating layer 220 away from the gate 210, the second insulating layer 240 is located on the side of the active layer 230 away from the first insulating layer 220, the source 250 and the drain 260 are both located on the side of the second insulating layer 240 away from the active layer 230, and the source 250 and the drain 260 are respectively connected to the active layer 230 through a through hole penetrating the second insulating layer 240. According to an embodiment of the present invention, the drain 260 in the driving circuit 200 is connected to the anode 310 of the light emitting device 300 through the connecting component 400 to drive the light emitting device 300 to emit light.

[0032] According to an embodiment of the present invention, referring to Figure 4 , the first connection component 410 further includes a first resistance reducing layer 412 stacked with the first transparent conductive layer 411, the resistance of the first resistance reducing layer 412 is greater than the resistance of the second resistance reducing layer 432, and the resistance of the first resistance reducing layer 412 is less than the resistance of the first transparent conductive layer 411. Thus, the first resistance reducing layer 412 can be connected in parallel with the first transparent conductive layer 411, and the resistance of the first connection component 410 is less than the resistance of the first resistance reducing layer 412, and less than the resistance of the first transparent conductive layer 411. The resistance difference between the first connection component 410 and the second connection component 430 can be further reduced, so that the resistances of the first connection component 410 and the second connection component 430 are nearly equal.

[0033] According to an embodiment of the present invention, referring to Figure 3-Figure 6The display panel further includes: a first flat layer 500, a second flat layer 600, a third connecting component 420, a third flat layer 700, a fourth flat layer 800 and a pixel defining layer 900, wherein the first flat layer 500 is disposed between the driving circuit 200 and the first connecting component 410, and the first connecting component 410 is electrically connected to the driving circuit 200 through a first through hole penetrating the first flat layer 500; the second flat layer 600 is disposed on a side of the first connecting component 410 away from the first flat layer 500; the third connecting component 420 is disposed on a surface of the second flat layer 600 away from the first flat layer 500, and .... The connection component 420 is electrically connected to the first connection component 410 through the second through hole penetrating the second flat layer 600; the third flat layer 700 is arranged between the third connection component 420 and the second connection component 430, and the second connection component 430 is electrically connected to the third connection component 420 through the third through hole penetrating the third flat layer 700; the fourth flat layer 800 is arranged between the second connection component 430 and the anode 310, and the anode 310 is electrically connected to the second connection component 430 through the fourth through hole penetrating the fourth flat layer 800; the pixel defining layer 900 is on the surface of the fourth flat layer 800 away from the base substrate 100. Thus, the driving circuit 200 and the anode 310 of the light emitting device 300 can be electrically connected through the first connection component 410, the third connection component 420 and the second connection component 430 arranged in different layers.

[0034] refer to Figure 3-Figure 6 The third connection component 420 includes a third resistance reduction layer 422 and a third transparent conductive layer 421 which are stacked. The third resistance reduction layer 422 and the third transparent conductive layer 421 are connected in parallel, which can reduce the resistance of the third connection component 420, thereby reducing the resistance difference between the first connection component 410, the third connection component 420 and the second connection component 430 which are arranged in different layers.

[0035] According to an embodiment of the present invention, the number of the connection components is N, where N is a positive integer greater than or equal to 4. In the direction in which the driving circuit 200 is away from the base substrate 100, the connection component 400 includes the N-1th connection component and the Nth connection component in sequence, the N-1th connection component and the Nth connection component are located between the first connection component 410 and the second connection component 430 in the direction perpendicular to the base substrate 100, the N-1th connection component includes the N-1th transparent conductive layer and the N-1th resistance reduction layer arranged in a stacked manner, the Nth connection component includes the Nth transparent conductive layer and the Nth resistance reduction layer arranged in a stacked manner, the resistance of the N-1th resistance reduction layer is less than the resistance of the N-1th transparent conductive layer, the resistance of the Nth resistance reduction layer is less than the resistance of the Nth transparent conductive layer, and the resistance of the N-1th transparent conductive layer is less than the resistance of the Nth transparent conductive layer. Thus, the resistance difference between the connection components arranged in different layers, including the first connection component 410, the N-1th connection component, the Nth connection component, and the second connection component 430, can be further reduced.

[0036] Further, when N is an integer greater than or equal to 5, the number of connection components is N, and the connection component 400 includes at least one of the connection components such as the N-2 connection component and the N-3 connection component in addition to the first connection component, the second connection component, the N-1 connection component, and the N-3 connection component. Of course, the connection components such as the N-2 connection component and the N-3 connection component are arranged between the first connection component and the N-1 connection component. For example, when N=6, the connection component 400 includes at least one of the first connection component, the second connection component, the fifth connection component, and the sixth connection component, and further includes a fourth connection component and a third connection component, and in the direction in which the driving circuit 200 is away from the base substrate 100, the first connection component, the third connection component, the fourth connection component, the fifth connection component, the sixth connection component, and the second connection component are stacked in sequence.

[0037] According to an embodiment of the present invention, the materials of the first transparent conductive layer 411, the second transparent conductive layer 431, the third transparent conductive layer 421, the N-1th transparent conductive layer and the Nth transparent conductive layer all include ITO (indium tin oxide), thereby further improving the light transmittance of the second display area B. According to an embodiment of the present invention, the materials of the first transparent conductive layer, the second transparent conductive layer 431, the third transparent conductive layer 421, the N-1th transparent conductive layer and the Nth transparent conductive layer may all be ITO.

[0038] When the connection component 400 is composed of the first transparent conductive layer 411, the second transparent conductive layer 431 and the third transparent conductive layer 421 arranged in different layers, that is, the connection component does not include the first resistance reducing layer 412, the second resistance reducing layer 432 and the third resistance reducing layer 422, the display panel has problems of uneven brightness and various traces. The inventor tested the resistance values ​​of the first transparent conductive layer 411, the second transparent conductive layer 431 and the third transparent conductive layer 421 of the display panel, and tested five sets of data, as shown in Table 1 below.

[0039] Table 1

[0040]

[0041]

[0042] As can be seen from Table 1, the resistance of the first transparent conductive layer 411 is less than the resistance of the third transparent conductive layer 421 and less than the resistance of the second transparent conductive layer 431, indicating that the resistances of transparent conductive layers of different layers are different. The inventors have found that if the ITO material is heated, the resistance of the ITO material will decrease. The resistance of the ITO material gradually decreases as the number of heating times increases. The inventors believe that the different resistances of transparent conductive layers of different layers are due to the different heating times of the materials of the transparent conductive layers of different layers.

[0043] After the transparent conductive layer is made, it is necessary to make a flat layer and a pixel defining layer 900 on the side away from the base substrate 100, and the steps of making the flat layer and the pixel defining layer 900 require high-temperature baking at a temperature higher than 200°C. After the transparent conductive layer is made, the transparent conductive layer material (ie, ITO) is heated once each time a flat layer or a pixel defining layer 900 is made on it. Therefore, the transparent conductive layers in different layers are heated at different times, and the resistance of the transparent conductive layers in different layers is different. Specifically, when the display panel also includes a first flat layer 500, a second flat layer 600, a third connecting component 420, a third flat layer 700, a fourth flat layer 800 and a pixel defining layer 900, refer to Figure 3-Figure 6After the first transparent conductive layer 411 is manufactured, a second flat layer 600, a third flat layer 700, a fourth flat layer 800 and a pixel defining layer 900 need to be manufactured on the side away from the base substrate 100, and the first transparent conductive layer 411 needs to be heated four times. After the third transparent conductive layer 421 is manufactured, a third flat layer 700, a fourth flat layer 800 and a pixel defining layer 900 need to be manufactured on the side away from the base substrate 100, and the third transparent conductive layer 421 needs to be heated three times. After the second transparent conductive layer 431 is manufactured, a fourth flat layer 800 and a pixel defining layer 900 need to be manufactured on the side away from the base substrate 100, and the second transparent conductive layer 431 needs to be heated twice. The number of heating times of the first transparent conductive layer 411, the third transparent conductive layer 421 and the second transparent conductive layer 431 gradually decreases, and therefore, the resistance of the first transparent conductive layer 411, the third transparent conductive layer 421 and the second transparent conductive layer 431 gradually increases.

[0044] According to the embodiment of the present invention, the resistance of the Nth resistance reduction layer and the resistance of the N-1th resistance reduction layer are both less than the resistance of the first transparent conductive layer 411. At the same time, the resistance of the first resistance reduction layer 412 is less than the resistance of the first transparent conductive layer 411, the resistance of the third resistance reduction layer 422 is less than the resistance of the first transparent conductive layer 411, and the resistance of the second resistance reduction layer 432 is less than the resistance of the first transparent conductive layer 411. The total resistance of the parallel circuit is smaller than the smallest parallel resistance. The present invention provides a resistance reduction layer with a resistance smaller than the resistance of the first transparent conductive layer 411. The stacked resistance reduction layer and the transparent conductive layer are connected in parallel, which can greatly reduce the resistance of the connection components of different layers, thereby reducing the resistance difference between the connection components of different layers. Specifically, the resistance difference between the first connecting component 410, the third connecting component 420, and the second connecting component 430 can be reduced; when N is greater than or equal to 4, the resistance difference between the connecting components arranged in different layers including the first connecting component 410, the N-1th connecting component, the Nth connecting component, and the second connecting component 430 can also be reduced, which can further improve the uneven brightness of the display panel, the presence of various marks, and other undesirable problems.

[0045] According to an embodiment of the present invention, the materials of the first resistance reduction layer 412, the second resistance reduction layer 432, the third resistance reduction layer 422, the N-1 resistance reduction layer and the N resistance reduction layer all include titanium nitride. Titanium nitride has a very low resistance and is an excellent conductive material. By stacking the resistance reduction layer and the transparent conductive layer in parallel, the resistance of the parallel connection component can be made less than the resistance of the resistance reduction layer, and at the same time less than the resistance of the transparent conductive layer. Specifically, the first resistance reduction layer 412 is connected in parallel with the first transparent conductive layer 411, and the resistance of the first connection component 410 after parallel connection is less than the resistance of the first resistance reduction layer 412, and at the same time less than the resistance of the first transparent conductive layer 411. The second resistance reduction layer 432 is connected in parallel with the second transparent conductive layer 431, and the resistance of the second connection component 430 after parallel connection is less than the resistance of the second resistance reduction layer 432, and at the same time less than the resistance of the second transparent conductive layer 431. Therefore, the resistance of all connection components is less than the resistance of titanium nitride, and because the resistance of titanium nitride is small, the resistance difference between connection components of different layers can be further reduced. According to some embodiments of the present invention, the materials of the first resistance reduction layer 412 , the second resistance reduction layer 432 , the third resistance reduction layer 422 , the N−1th resistance reduction layer and the Nth resistance reduction layer may all be titanium nitride.

[0046] According to an embodiment of the present invention, the thickness of the first resistance reducing layer 412 is less than the thickness of the second resistance reducing layer 432, and the thickness of the N-1th resistance reducing layer is less than the thickness of the Nth resistance reducing layer. Figure 3-Figure 6 , the thickness of the third resistance reduction layer 422 is less than the thickness of the second resistance reduction layer 432, and the thickness of the first resistance reduction layer 412, the thickness of the third resistance reduction layer 422, and the thickness of the second resistance reduction layer 432 increase in sequence. The inventors found that the resistance of the resistance reduction layer is related to the thickness of the resistance reduction layer. The greater the thickness, the smaller the resistance. Therefore, the resistance of the first resistance reduction layer 412, the resistance of the third resistance reduction layer 422, and the resistance of the second resistance reduction layer 432 decrease in sequence, while the resistance of the first transparent conductive layer 411, the third transparent conductive layer 421, and the second transparent conductive layer 431 gradually increase. The stacked resistance reduction layer is connected in parallel with the transparent conductive layer, and the resistance of the resistance reduction layer cooperates with the resistance of the transparent conductive layer, so that the resistance of any two of the first connection component 410, the third connection component 420, and the second connection component 430 can be close to equal, and the resistance difference between the first connection component 410, the third connection component 420, and the second connection component 430 can be further reduced. When N is greater than or equal to 4, the resistance difference between the connection components arranged in different layers including the first connection component 410 , the N−1th connection component, the Nth connection component, and the second connection component 430 can be further reduced.

[0047] According to some embodiments of the present invention, reference Figure 3-Figure 6 , the thickness of the first resistance reduction layer 412 can be For example The thickness of the third resistance reduction layer 422 can be For example The thickness of the second resistance reduction layer 432 can be For example

[0048] According to an embodiment of the present invention, the first resistance reduction layer 412 in the first connection component 410 is arranged close to or away from the base substrate 100, the second resistance reduction layer 432 in the second connection component 430 is arranged close to or away from the base substrate 100, the third resistance reduction layer 422 in the third connection component 420 is arranged close to or away from the base substrate 100, the N-1th resistance reduction layer in the N-1th connection component is arranged close to or away from the base substrate 100, and the Nth resistance reduction layer in the Nth connection component is arranged close to or away from the base substrate 100. In other words, the present invention does not limit the position of the resistance reduction layer in the connection component, as long as the stacked resistance reduction layer and the transparent conductive layer can be connected in parallel. Figure 2-6 The figure shows the situation where the resistance reduction layer in the connection component is located on the side close to the base substrate 100, but the position of the resistance reduction layer in the connection component is not limited to this. The resistance reduction layer in the connection component may also be located on the side away from the base substrate 100, or the resistance reduction layer in some layers is located on the side close to the base substrate 100, and in other layers the resistance reduction layer is located on the side away from the base substrate 100.

[0049] According to an embodiment of the present invention, the first transparent conductive layer 411 and the first resistance reduction layer 412, the second transparent conductive layer 431 and the second resistance reduction layer 432, the third transparent conductive layer 421 and the third resistance reduction layer 422, the N-1th transparent conductive layer and the N-1th resistance reduction layer, and the Nth transparent conductive layer and the Nth resistance reduction layer can be prepared in the same chamber. For example, after the pattern is defined by photoresist, the ITO transparent electrode layer and the titanium nitride layer film are removed simultaneously by a wet etching process, and then the photoresist is removed to form a pattern.

[0050] refer to Figure 3-6 , the driving circuit 200 is located in the first display area A, and the driving circuit 200 and the first connecting component 410 are contacted and connected through the first through hole, so the first through hole needs to be set in the first display area A. The light-emitting device 300 is located in the second display area B, and the light-emitting device 300 and the second connecting component 430 are contacted and connected through the fourth through hole, so the fourth through hole needs to be set in the second display area B. The present invention does not limit the positions of the second through hole and the third through hole, and those skilled in the art can choose according to the use requirements. Exemplarily, the positional relationship of the first through hole, the second through hole, the third through hole, and the fourth through hole can satisfy at least one of the following three situations:

[0051] According to some embodiments of the present invention, reference Figure 3 and Figure 4, the orthographic projection of the first through hole on the base substrate 100 is located in the first display area A, and the orthographic projections of the second through hole on the base substrate 100, the orthographic projections of the third through hole on the base substrate 100, and the orthographic projections of the fourth through hole on the base substrate 100 are all located in the second display area B. In the first display area A, the first connecting component 410 is overlapped with the driving circuit 200, and in the second display area B, the first connecting component 410 is overlapped with the anode 310 of the light-emitting device 300 through the third connecting component 420 and the second connecting component 430.

[0052] According to some embodiments of the present invention, reference Figure 5 , the orthographic projection of the first through hole on the substrate 100 and the orthographic projection of the second through hole on the substrate 100 are both located in the first display area A, and the orthographic projection of the third through hole on the substrate 100 and the orthographic projection of the fourth through hole on the substrate 100 are both located in the second display area B. In the first display area A, the third connecting component 420 is connected to the driving circuit 200 through the first connecting component 410; in the second display area B, the third connecting component 420 is connected to the anode 310 of the light-emitting device 300 through the second connecting component 430.

[0053] According to some embodiments of the present invention, reference Figure 6 , the orthographic projection of the first through hole on the base substrate 100, the orthographic projection of the second through hole on the base substrate 100, and the orthographic projection of the third through hole on the base substrate 100 are all located in the first display area A, and the orthographic projection of the fourth through hole on the base substrate 100 is located in the second display area B. In the first display area A, the second connecting component 430 is connected to the driving circuit 200 through the third connecting component 420 and the first connecting component 410; in the second display area B, the second connecting component 430 is directly connected to the anode 310 of the light emitting device 300. At this time, only the second connecting component 430 is located in the second display area B, which can greatly improve the transmittance of the second display area B.

[0054] The present invention also provides a display device, referring to Figure 7-9, the display device includes a display panel 1000 and an under-screen camera 2000, the orthographic projection of the under-screen camera 2000 on the display panel 1000 has an overlapping area with the second display area B, wherein the display panel 1000 has the same technical features as the display panel described above. As a result, the display device has all the features and advantages of the display panel described above, which will not be repeated here. In general, the resistance reduction layer can be connected in parallel with the transparent conductive layer, which can reduce the resistance difference between the transparent conductive layers of different layers, so that the resistance of the connecting components of different layers is nearly equal. Moreover, the total resistance of the parallel circuit is smaller than the smallest parallel resistance. After the resistance reduction layer is set, the total resistance after parallel connection is greatly reduced, which can reduce the resistance difference caused by inconsistent routing lengths of the transparent conductive layers in the same layer, thereby improving the display device. Uneven brightness, the presence of various traces and other undesirable problems.

[0055] refer to Figure 7 , the orthographic projection area of ​​the under-screen camera 2000 on the display panel 1000 may be equal to the area of ​​the second display area B. Figure 8 , the orthographic projection area of ​​the under-screen camera 2000 on the display panel 1000 may be larger than the area of ​​the second display area B. Fig. 9 , the orthographic projection area of ​​the under-screen camera 2000 on the display panel 1000 may also be smaller than the area of ​​the second display area B. The present invention does not limit the specific position of the under-screen camera 2000, and the position of the under-screen camera 2000 may be any of the above three situations, as long as the orthographic projection of the under-screen camera 2000 on the display panel 1000 overlaps with the second display area B and ensures a better light transmittance, so that the under-screen camera 2000 can have a better shooting quality.

[0056] According to the embodiments of the present invention, there is no special requirement for the specific type of the above display device, and those skilled in the art can flexibly select according to actual needs. In some embodiments, the display device can be an electronic device with display function and shooting function, such as a mobile phone, iPad, notebook, kindle, game console, etc.

[0057] In the absence of mutual contradiction, those skilled in the art may combine and combine the different examples and features of the different examples described in this specification. In addition, it should be noted that in this specification, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0058] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A display panel, characterized in that: The display panel includes a first display area and a second display area, and the display panel includes: substrate substrate; A driving circuit, wherein the driving circuit is arranged on one side of the base substrate and is located in the first display area; A light emitting device, the light emitting device is arranged on a side of the base substrate away from the driving circuit and is located in the second display area; at least two connecting components, the connecting components are used to electrically connect the driving circuit and the light-emitting device, and are located between the driving circuit and the light-emitting device in a direction perpendicular to the substrate, and in a direction in which the driving circuit is away from the substrate, the connecting components include a first connecting component and a second connecting component, the first connecting component and the second connecting component are located in different layers, the first connecting component is electrically connected to the driving circuit, and the second connecting component is electrically connected to the anode of the light-emitting device, The first connecting component includes a first transparent conductive layer, the second connecting component includes a second transparent conductive layer and a second resistance reducing layer which are stacked, the resistance of the second resistance reducing layer is smaller than the resistance of the second transparent conductive layer, and the resistance of the first transparent conductive layer is smaller than the resistance of the second transparent conductive layer; The light emitting device further comprises a light emitting layer and a cathode. The light emitting layer is located on a side of the anode away from the substrate, and the cathode is located on a side of the light emitting layer away from the anode.

2. The display panel according to claim 1, characterized in that: The first connection component also includes a first resistance reducing layer stacked with the first transparent conductive layer, the resistance of the first resistance reducing layer is greater than the resistance of the second resistance reducing layer, and the resistance of the first resistance reducing layer is less than the resistance of the first transparent conductive layer.

3. The display panel according to claim 1, characterized in that: The number of the connecting components is N, where N is a positive integer greater than or equal to 4. In the direction in which the driving circuit is away from the base substrate, the connecting components sequentially include an N-1th connecting component and an N-th connecting component, and the N-1th connecting component and the N-1th connecting component are located between the first connecting component and the second connecting component in a direction perpendicular to the base substrate. The N-1th connecting component includes an N-1th transparent conductive layer and an N-1th resistance reduction layer that are stacked, and the N connecting component includes an N-1th transparent conductive layer and an N-1th resistance reduction layer that are stacked, a resistance of the N-1th resistance reduction layer is smaller than a resistance of the N-1th transparent conductive layer, a resistance of the N-1th resistance reduction layer is smaller than a resistance of the N-1th transparent conductive layer, and a resistance of the N-1th transparent conductive layer is smaller than a resistance of the N-1th transparent conductive layer.

4. The display panel according to claim 3, characterized in that: The resistance of the Nth resistance reducing layer and the resistance of the N-1th resistance reducing layer are both smaller than the resistance of the first transparent conductive layer.

5. The display panel according to claim 3, characterized in that: The materials of the first transparent conductive layer, the second transparent conductive layer, the N-1th transparent conductive layer and the Nth transparent conductive layer all include ITO, and the materials of the first resistance reduction layer, the second resistance reduction layer, the N-1th resistance reduction layer and the Nth resistance reduction layer all include titanium nitride.

6. The display panel according to claim 3, characterized in that: The thickness of the first resistance reduction layer is smaller than that of the second resistance reduction layer, and the thickness of the N-1th resistance reduction layer is smaller than that of the Nth resistance reduction layer.

7. The display panel according to claim 1, characterized in that: The display panel further includes: a first planar layer, wherein the first planar layer is disposed between the driving circuit and the first connecting component, and the first connecting component is electrically connected to the driving circuit via a first through hole penetrating the first planar layer; a second flat layer, the second flat layer being arranged on a side of the first connecting component away from the first flat layer; a third connecting component, the third connecting component is arranged on a surface of the second flat layer away from the first flat layer, and the third connecting component is electrically connected to the first connecting component through a second through hole penetrating the second flat layer; a third flat layer, the third flat layer being disposed between the third connecting component and the second connecting component, the second connecting component being electrically connected to the third connecting component via a third through hole penetrating the third flat layer; a fourth flat layer, wherein the fourth flat layer is disposed between the second connection component and the anode, and the anode is electrically connected to the second connection component via a fourth through hole penetrating the fourth flat layer; A pixel defining layer is provided on a surface of the fourth planar layer away from the base substrate.

8. The display panel according to claim 7, characterized in that: The orthographic projection of the first through hole on the base substrate is located in the first display area, and the orthographic projections of the second through hole on the base substrate, the third through hole on the base substrate and the fourth through hole on the base substrate are all located in the second display area.

9. The display panel according to claim 7, characterized in that: The orthographic projection of the first through hole on the base substrate and the orthographic projection of the second through hole on the base substrate are both located in the first display area, and the orthographic projection of the third through hole on the base substrate and the orthographic projection of the fourth through hole on the base substrate are both located in the second display area.

10. The display panel according to claim 7, characterized in that: The orthographic projection of the first through hole on the base substrate, the orthographic projection of the second through hole on the base substrate and the orthographic projection of the third through hole on the base substrate are all located in the first display area, and the orthographic projection of the fourth through hole on the base substrate is located in the second display area.

11. A display device, characterized in that: include: The display panel according to any one of claims 1 to 10; An under-screen camera, wherein the orthographic projection of the under-screen camera on the display panel has an overlapping area with the second display area.

Images