CN113629125A

CN113629125A - Display panel and display device

Info

Publication number: CN113629125A
Application number: CN202111061191.9A
Authority: CN
Inventors: 张静; 李诗琪; 胡国仁; 龙跃
Original assignee: BOE Technology Group Co Ltd; Mianyang BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Mianyang BOE Optoelectronics Technology Co Ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2021-11-09

Abstract

The invention discloses a display panel and a display device, the display panel comprises a first display area and a second display area, the display panel comprises: the substrate base plate, drive circuit, emitting device and two at least coupling assembling, coupling assembling is used for connecting drive circuit and emitting device electrically, coupling assembling includes first coupling assembling and second coupling assembling, first coupling assembling and second coupling assembling are located different layers, first coupling assembling includes first transparent conducting layer, second coupling assembling falls the resistance layer including the second transparent conducting layer and the second that range upon range of setting, the resistance that the second falls the resistance layer is less than the resistance of the transparent conducting layer of second, the resistance of first transparent conducting layer is less than the resistance of the transparent conducting layer of second. The second resistance reducing layer is connected with the second transparent conducting layer in parallel, so that the resistance of the second connecting assembly is reduced, the resistance difference between the connecting assemblies on different layers is reduced, the resistance difference caused by different lengths of the wires on the same layer is reduced, and the problem of poor brightness uniformity of the display panel is solved.

Description

Display panel and display device

Technical Field

The invention belongs to the technical field of display, and particularly relates to a display panel and a display device.

Background

In order to reduce the influence of the camera on the screen occupation ratio and realize the full-screen, different manufacturers develop various solutions from different angles. One technical direction is: and digging a through Hole on the display panel to form the AA Hole display panel. The other technical direction is as follows: by adopting the under-screen camera shooting technology, a driving circuit of an under-screen camera shooting area is arranged externally, only a light-emitting device is left, and the larger transmittance of the display panel is maintained. However, transparent wires are required to connect the external driving circuit and the light emitting device. Because the regional many pixels that are provided with of making a video recording under the screen correspond a plurality of luminescent device, consequently need set up a plurality of transparent lines and be connected a plurality of luminescent device and a plurality of external drive circuit respectively, if set up a plurality of transparent lines in same layer, there is the intensive problem of line of walking. In order to solve the problem of dense lines, transparent wires are usually arranged in different layers, but current signals of different pixels have differences, and the problems of uneven brightness of a display, various traces and the like exist. In addition, the resistance of the wires is related to the length of the wires, the larger the length of the wires is, the larger the resistance of the wires is, and when the lengths of the wires on the same layer are different, the problems of uneven brightness, various traces and the like of the display panel can also occur.

Therefore, there is a need for an improvement of the existing display panel.

Disclosure of Invention

The present invention aims to ameliorate at least one of the above technical problems to at least some extent.

In order to solve the above technical problem, the present invention provides a display panel, wherein the display panel includes a first display area and a second display area, and the display panel includes: a substrate base plate; the driving circuit is arranged on one side of the substrate base plate and is positioned in the first display area; the light-emitting device is arranged on one side, far away from the driving circuit, of the substrate base plate and is positioned in the second display area; at least two connection members for electrically connecting the driving circuit and the light emitting device, and between the driving circuit and the light emitting device in a direction perpendicular to the base substrate, the connection member includes a first connection member and a second connection member in a direction in which the driving circuit is away from the substrate base plate, the first connecting assembly and the second connecting assembly are positioned at different layers, the first connecting assembly is electrically connected with the driving circuit, the second connecting assembly is electrically connected with the anode of the light-emitting device, wherein the first connecting component comprises a first transparent conductive layer, the second connecting component comprises a second transparent conductive layer and a second resistance reducing layer which are arranged in a stacked manner, the resistance of the second resistance reducing layer is smaller than that of the second transparent conducting layer, and the resistance of the first transparent conducting layer is smaller than that of the second transparent conducting layer. From this, second transparent conducting layer and second fall and hinder the layer parallelly connected, parallel circuit's total resistance is still little than minimum parallel resistance, can reduce second coupling assembling's resistance, and first coupling assembling and second coupling assembling's resistance is close to equals, can reduce the resistance difference between the first coupling assembling and the second coupling assembling that different layers set up. Because the total resistance of the parallel circuit is smaller than the minimum parallel resistance, after the second resistance reducing layer is arranged, the resistance of the second connecting assembly is greatly reduced after the parallel connection, the invention can also reduce the resistance difference caused by the inconsistent wiring length of the transparent conducting layers on the same layer, and effectively improve the problems of uneven brightness, various traces and the like of the display panel.

According to an embodiment of the present invention, the first connection assembly further includes a first resistance reducing layer stacked on the first transparent conductive layer, a resistance of the first resistance reducing layer is greater than a resistance of the second resistance reducing layer, and a resistance of the first resistance reducing layer is smaller than a resistance of the first transparent conductive layer. Therefore, the first transparent conductive layer and the first resistance reducing layer are connected in parallel, and the resistance of the first connecting assembly can be reduced. The resistance of first transparent conducting layer is less than the resistance of second transparent conducting layer, and the resistance of first resistance layer that falls is greater than the resistance that the second falls the resistance layer, and the transparent conducting layer that stacks up sets up and fall the resistance layer and cooperate each other, can make first connecting component and second connecting component's resistance be close to equal, further reduces the resistance difference between the connecting components that different layers set up, has further improved display panel luminance inhomogeneous, has various vestige scheduling problem.

According to the embodiment of the invention, the number of the connecting assemblies is N, N is a positive integer greater than or equal to 4, in the direction of the driving circuit away from the substrate base plate, the connecting assemblies sequentially comprise an N-1 connecting assembly and an N connecting assembly, the N-1 connecting assembly and the N connecting assembly are positioned between the first connecting assembly and the second connecting assembly in the direction perpendicular to the substrate base plate, the N-1 connecting assembly comprises an N-1 transparent conductive layer and an N-1 resistance reducing layer which are arranged in a stacked manner, the N connecting assembly comprises an N transparent conductive layer and an N resistance reducing layer which are arranged in a stacked manner, the resistance of the N-1 resistance reducing layer is smaller than that of the N-1 transparent conductive layer, and the resistance of the N resistance reducing layer is smaller than that of the N transparent conductive layer, the resistance of the N-1 th transparent conducting layer is smaller than that of the N transparent conducting layer. Therefore, the resistance difference among the connecting assemblies arranged on different layers including the first connecting assembly, the N-1 connecting assembly, the N connecting assembly and the second connecting assembly can be further reduced.

According to the embodiment of the invention, the resistance of the Nth resistance reducing layer and the resistance of the N-1 th resistance reducing layer are both smaller than the resistance of the first transparent conducting layer. Because the total resistance of the parallel circuit is smaller than the minimum parallel resistance, after the resistance reducing layer with smaller resistance is arranged, the resistance of the connecting assembly after parallel connection can be greatly reduced, and the resistance difference of the connecting assemblies arranged on different layers including the first connecting assembly, the N-1 connecting assembly, the N connecting assembly and the second connecting assembly can be further reduced.

According to the embodiment of the invention, the materials of the first transparent conducting layer, the second transparent conducting layer, the N-1 transparent conducting layer and the N transparent conducting layer comprise ITO, and the materials of the first resistance reducing layer, the second resistance reducing layer, the N-1 resistance reducing layer and the N resistance reducing layer comprise titanium nitride. The ITO and titanium nitride materials have the advantages of low price and easy obtaining, and can reduce the production cost of the display panel.

According to the embodiment of the invention, the thickness of the first resistance reducing layer is smaller than that of the second resistance reducing layer, and the thickness of the N-1 th resistance reducing layer is smaller than that of the N-th resistance reducing layer. Since the resistance of the first transparent conductive layer is smaller than that of the second transparent conductive layer, the resistance of the (N-1) th transparent conductive layer is smaller than that of the Nth transparent conductive layer, that is, the resistances of the transparent conductive layers of different layers are different. The resistance of the resistance reducing layer is related to the thickness of the resistance reducing layer, the larger the thickness is, the smaller the resistance of the resistance reducing layer is, the resistance reducing layer is connected with the transparent conducting layer in parallel, the thickness of the resistance reducing layer positioned on different layers is changed according to the conditions, the resistance difference of the connecting components of different layers including the first connecting component, the N-1 connecting component, the N connecting component and the second connecting component after the parallel connection can be reduced, the resistance of the connecting components of different layers including the first connecting component, the N-1 connecting component, the N connecting component and the second connecting component is enabled to be approximately equal, and the problems that the brightness of the display panel is uneven, various marks exist and the like are further improved.

According to an embodiment of the present invention, the display panel further includes: the first flat layer is arranged between the driving circuit and the first connecting assembly, and the first connecting assembly is electrically connected with the driving circuit through a first through hole penetrating through the first flat layer; a second planar layer disposed on a side of the first connection assembly away from the first planar layer; the third connecting assembly is arranged on the surface, far away from the first flat layer, of the second flat layer and is electrically connected with the first connecting assembly through a second through hole penetrating through the second flat layer; a third planar layer disposed between the third connection assembly and a second connection assembly electrically connected to the third connection assembly through a third through hole passing through the third planar layer; a fourth planar layer disposed between the second connection assembly and the anode, the anode being electrically connected to the second connection assembly through a fourth via that penetrates the fourth planar layer; a pixel defining layer on a surface of the fourth planar layer distal from the substrate base plate. Therefore, the first connecting assembly, the third connecting assembly and the second connecting assembly which are arranged at different layers can realize the electric connection of the driving circuit and the light-emitting device.

According to the embodiment of the invention, the orthographic projection of the first through hole on the substrate base plate is positioned in the first display area, and the orthographic projection of the second through hole on the substrate base plate, the orthographic projection of the third through hole on the substrate base plate and the orthographic projection of the fourth through hole on the substrate base plate are positioned in the second display area. In the first display area, the first connecting assembly is connected with the driving circuit in an overlapping mode, and in the second display area, the first connecting assembly is connected with the anode of the light-emitting device in an overlapping mode through the third connecting assembly and the second connecting assembly in a switching mode.

According to the embodiment of the present invention, an orthographic projection of the first through hole on the substrate base plate and an orthographic projection of the second through hole on the substrate base plate are both located in the first display area, and an orthographic projection of the third through hole on the substrate base plate and an orthographic projection of the fourth through hole on the substrate base plate are both located in the second display area. In the first display area, the third connecting assembly is connected with the driving circuit in a switching mode through the first connecting assembly; and in the second display area, the third connecting component is connected with the anode of the light-emitting device in an adapting mode through the second connecting component.

According to the embodiment of the present invention, an orthographic projection of the first through hole on the substrate base plate, an orthographic projection of the second through hole on the substrate base plate, and an orthographic projection of the third through hole on the substrate base plate are all located in the first display area, and an orthographic projection of the fourth through hole on the substrate base plate is located in the second display area. In the first display area, the second connecting component is connected with the driving circuit in a switching mode through the first connecting component and the third connecting component; in the second display region, the second connection member directly overlaps the anode of the light emitting device.

The present invention also provides a display device including: the display panel described above; and the orthographic projection of the camera under the screen on the display panel and the second display area have an overlapping area. Therefore, the display device has all the features and advantages of the display panel described above, and will not be described herein again. Generally speaking, the resistance reducing layers arranged in a stacked mode can be connected with the transparent conducting layers in parallel, the resistance of the connecting components is reduced, the resistance difference between the connecting components arranged on different layers can be reduced, and the resistances of the connecting components on different layers are close to equal. And the total resistance of the parallel circuit is smaller than the minimum parallel resistance, and after the resistance reducing layer is arranged, the total resistance is greatly reduced after parallel connection, so that the resistance difference caused by the inconsistent wiring length of the transparent conducting layers on the same layer can be reduced, and the problems of uneven brightness, various traces and the like of the display panel are further solved.

Drawings

FIG. 1 is a top view of a display panel;

FIG. 2 is a schematic diagram of a display panel according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a display panel according to another embodiment of the present invention;

FIG. 4 is a schematic diagram of a display panel according to another embodiment of the present invention;

FIG. 5 is a schematic diagram of a display panel according to another embodiment of the present invention;

FIG. 6 is a schematic diagram of a display panel according to another embodiment of the present invention;

FIG. 7 is a schematic diagram of a display device according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a display device according to another embodiment of the present invention;

fig. 9 is a schematic structural diagram of a display device according to another embodiment of the present invention.

Description of the reference numerals

1000-display panel, a-first display area, B-second display area, 100-substrate base plate, 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 reducing layer, 430-second connecting component, 431-second transparent conductive layer, 432-second resistance reducing layer, 420-third connecting component, 421-third transparent conductive layer, 422-third resistance reducing layer, 500-first flat layer, 600-second flat layer, 700-third flat layer, 800-fourth flat layer, 900-pixel definition layer, 2000-under-screen camera.

Detailed Description

The following describes embodiments of the present invention in detail. The following examples are illustrative only and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents used are not indicated by manufacturers, and are all conventional products available on the market.

Referring to fig. 1, the under-screen image capture area of the display panel needs to be compatible with high transmittance and display function, a plurality of pixels may exist in the second display area B, each pixel is provided with a light emitting device 300, and the second display area B does not have a large-area driving circuit 200, and the driving circuit 200 needs to be externally disposed. Transparent electrode traces are required to connect the driving circuit 200 with the light emitting device 300. Since the display panel includes the plurality of driving circuits 200 and the plurality of light emitting devices 300, a plurality of transparent electrode traces need to be disposed, and if the plurality of transparent electrode traces are disposed on the same layer, there is a problem of dense traces, and the plurality of transparent electrode traces are generally disposed on different layers. The inventor finds that the plurality of transparent electrode wires arranged on different layers have different resistances, and have the defects of uneven brightness of the display panel, various traces and the like. In addition, the resistance of the transparent electrode routing is related to the routing length, the larger the routing length is, the larger the resistance of the routing is, and when the routing lengths of the transparent electrodes on the same layer are different, the problems of uneven brightness, various traces and the like of the display panel can also occur.

In order to solve the above technical problem, the present invention provides a display panel, referring to fig. 2, the display panel includes a first display area a and a second display area B, and the display panel includes a substrate 100, a driving circuit 200, a light emitting device 300, and at least two connecting components; the driving circuit 200 is disposed at one side of the substrate base plate 100 and is located in the first display area a; the light emitting device 300 is disposed on a side of the substrate base plate 100 away from the driving circuit 200, and is located in the second display region B; the connection member 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 substrate base plate 100. The connection assembly 400 includes a first connection assembly 410 and a second connection assembly 430, the first connection assembly 410 and the second connection assembly 430 are located at different layers, the first connection assembly 410 is electrically connected to the driving circuit 200, the second connection assembly 430 is electrically connected to the anode 310 of the light emitting device 300, wherein the first connection assembly 410 includes a first transparent conductive layer 411, the second connection assembly 430 includes a second transparent conductive layer 431 and a second resistance reducing layer 432, which are stacked, the resistance of the second resistance reducing layer 432 is smaller than that of the second transparent conductive layer 431, and the resistance of the first transparent conductive layer 411 is smaller than that of the second transparent conductive layer 431. Therefore, the second resistance reducing layer 432 can be connected in parallel with the second transparent conductive layer 431, so that the resistance difference between the second transparent conductive layer 431 and the first transparent conductive layer 411 is reduced, the resistances of the first connecting assembly 410 and the second connecting assembly 430 are approximately equal, and the resistance difference between connecting assemblies arranged on different layers can be effectively reduced. Because the total resistance of the parallel circuit is smaller than the minimum parallel resistance, after the second resistance reducing layer 432 is arranged, the total resistance is greatly reduced after parallel connection, although the total resistance is still different due to the fact that the wiring lengths of the transparent conducting layers on the same layer are different, the difference value of the total resistance is greatly reduced, and the difference value has almost no influence on the display panel.

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 being located on a side of the anode 310 away from the substrate 100, the cathode 330 being 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 an electron transport layer, an electron injection layer, a hole transport layer, a hole injection layer, and the like.

The driving circuit 200 includes a gate electrode 210, a first insulating layer 220, an active layer 230, a second insulating layer 240, a source electrode 250, and a drain electrode 260, wherein the gate electrode 210 is located at one side of the substrate 100, the first insulating layer 220 is located at one side of the gate electrode 210 away from the substrate 100, the active layer 230 is located at one side of the first insulating layer 220 away from the gate electrode 210, the second insulating layer 240 is located at one side of the active layer 230 away from the first insulating layer 220, the source electrode 250 and the drain electrode 260 are both located at one side of the second insulating layer 240 away from the active layer 230, and the source electrode 250 and the drain electrode 260 are respectively connected to the active layer 230 through via holes penetrating through the second insulating layer 240. According to the embodiment of the present invention, the drain electrode 260 in the driving circuit 200 is connected to the anode 310 of the light emitting device 300 through the connection member 400 to drive the light emitting device 300 to emit light.

According to an embodiment of the present invention, referring to fig. 4, the first connection assembly 410 further includes a first resistance reducing layer 412 stacked on 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 element 410 is smaller than the resistance of the first resistance-reducing layer 412 and smaller than the resistance of the first transparent conductive layer 411. The difference in resistance between the first connecting member 410 and the second connecting member 430 can be further reduced so that the resistances of the first connecting member 410 and the second connecting member 430 are approximately equal.

According to an embodiment of the present invention, referring to fig. 3 to 6, the 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 through the first flat layer 500; the second planarization layer 600 is disposed on a side of the first connection element 410 away from the first planarization layer 500; the third connecting member 420 is disposed on a surface of the second planarization layer 600 away from the first planarization layer 500, and the third connecting member 420 is electrically connected to the first connecting member 410 through a second through hole penetrating the second planarization layer 600; the third flat layer 700 is disposed between the third connection assembly 420 and the second connection assembly 430, and the second connection assembly 430 is electrically connected to the third connection assembly 420 through a third through hole penetrating the third flat layer 700; the fourth flat layer 800 is disposed between the second connection assembly 430 and the anode 310, and the anode 310 is electrically connected to the second connection assembly 430 through a 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 substrate base plate 100. Thus, the driving circuit 200 and the anode 310 of the light emitting device 300 may be electrically connected through the first connection member 410, the third connection member 420, and the second connection member 430 disposed at different layers.

Referring to fig. 3 to 6, the third connection assembly 420 includes a third resistance reducing layer 422 and a third transparent conductive layer 421, which are stacked, and the third resistance reducing layer 422 and the third transparent conductive layer 421 are connected in parallel, so that the resistance of the third connection assembly 420 can be reduced, and further, the resistance difference among the first connection assembly 410, the third connection assembly 420 and the second connection assembly 430, which are disposed in different layers, is reduced.

According to the embodiment of the invention, the number of the connecting components is N, N is a positive integer greater than or equal to 4, in the direction that the driving circuit 200 is far away from the substrate base plate 100, the connecting assembly 400 sequentially comprises an N-1 connecting assembly and an N connecting assembly, the N-1 connecting assembly and the N connecting assembly are located between the first connecting assembly 410 and the second connecting assembly 430 in the direction perpendicular to the substrate base plate 100, the N-1 connecting assembly comprises an N-1 transparent conducting layer and an N-1 resistance reducing layer which are arranged in a stacked mode, the N connecting assembly comprises an N transparent conducting layer and an N resistance reducing layer which are arranged in a stacked mode, the resistance of the N-1 resistance reducing layer is smaller than that of the N-1 transparent conducting layer, the resistance of the N resistance reducing layer is smaller than that of the N transparent conducting layer, and the resistance of the N-1 transparent conducting layer is smaller than that of the N transparent conducting layer. Thus, the resistance difference between the connection members disposed at different layers including the first connection member 410, the N-1 connection member, the N-th connection member, and the second connection member 430 can be further reduced.

Further, when N is an integer greater than or equal to 5, the number of the connecting assemblies is N, and the connecting assembly 400 may further include at least one of a connecting assembly such as an N-2 th connecting assembly and an N-3 th connecting assembly in addition to the first connecting assembly, the second connecting assembly, the N-1 th connecting assembly and the N-3 th connecting assembly, of course, the connecting assembly such as the N-2 th connecting assembly and the N-3 rd connecting assembly is disposed between the first connecting assembly and the N-1 th connecting assembly. For example, when N is 6, the connection assembly 400 may further include a fourth connection assembly and a third connection assembly in addition to the first connection assembly, the second connection assembly, the fifth connection assembly and the sixth connection assembly, and the first connection assembly, the third connection assembly, the fourth connection assembly, the fifth connection assembly, the sixth connection assembly and the second connection assembly are sequentially stacked in a direction in which the driving circuit 200 is far away from the substrate base plate 100.

According to the 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-1 th transparent conductive layer, and the nth transparent conductive layer all include ITO (indium tin oxide), and thus, the light transmittance of the second display region B may be further improved. 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-1 th transparent conductive layer, and the nth transparent conductive layer may all be ITO.

When the connection assembly 400 is composed of the first transparent conductive layer 411, the second transparent conductive layer 431, and the third transparent conductive layer 421, which are disposed in different layers, that is, the connection assembly 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 tests 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 tests five groups of data, specifically, see table 1 below.

TABLE 1

As can be seen from table 1, the resistance of the first transparent conductive layer 411 < the resistance of the third transparent conductive layer 421 < the resistance of the second transparent conductive layer 431, which illustrates that the resistances of the transparent conductive layers of different layers are different. The inventors have found that the resistance of the ITO material becomes small if the ITO material is heated. The resistance of the ITO material gradually becomes smaller as the number of heating times increases. The inventors believe that the different resistances of the transparent conductive layers of the different layers are due to the different numbers of heating times of the materials of the transparent conductive layers of the different layers.

After the transparent conductive layer is formed, a planarization layer and a pixel defining layer 900 are formed on the side of the transparent conductive layer away from the substrate 100, and the planarization layer and the pixel defining layer 900 are baked at a temperature higher than 200 ℃. After the transparent conductive layer is formed, a transparent conductive layer material (i.e., ITO) is heated once for each of the planarization layer or pixel definition layer 900 formed thereon. Therefore, the heating times of the transparent conductive layers in different layers are different, and the resistance of the transparent conductive layers in different layers is different. Specifically, when the display panel further includes the first flat layer 500, the second flat layer 600, the third connecting component 420, the third flat layer 700, the fourth flat layer 800 and the pixel defining layer 900, referring to fig. 3 to 6, after the first transparent conductive layer 411 is manufactured, the second flat layer 600, the third flat layer 700, the fourth flat layer 800 and the pixel defining layer 900 need to be manufactured on the side of the first transparent conductive layer 411 away from the substrate base plate 100, and the first transparent conductive layer 411 needs to be heated four times. After the third transparent conductive layer 421 is manufactured, the third flat layer 700, the fourth flat layer 800 and the pixel defining layer 900 need to be manufactured on the side of the third transparent conductive layer 421 away from the substrate base plate 100, and the third transparent conductive layer 421 needs to be heated three times. After the second transparent conductive layer 431 is manufactured, the fourth flat layer 800 and the pixel defining layer 900 need to be manufactured on the side of the second transparent conductive layer 431 away from the substrate base plate 100, and the second transparent conductive layer 431 needs to be heated twice. Since the number of times of heating the first transparent conductive layer 411, the third transparent conductive layer 421, and the second transparent conductive layer 431 is gradually reduced, the resistances of the first transparent conductive layer 411, the third transparent conductive layer 421, and the second transparent conductive layer 431 are gradually increased.

According to the embodiment of the invention, the resistance of the Nth resistance reducing layer and the resistance of the N-1 th resistance reducing layer are both smaller than the resistance of the first transparent conductive layer 411. Meanwhile, the resistance of the first resistance reducing layer 412 is smaller than that of the first transparent conductive layer 411, the resistance of the third resistance reducing layer 422 is smaller than that of the first transparent conductive layer 411, and the resistance of the second resistance reducing layer 432 is smaller than that of the first transparent conductive layer 411. The total resistance of the parallel circuit is smaller than the minimum parallel resistance, the resistance reducing layer smaller than the resistance of the first transparent conducting layer 411 is arranged, and the resistance reducing layers and the transparent conducting layers which are arranged in a stacked mode are connected in parallel, so that the resistance of connecting components on different layers can be greatly reduced, and the resistance difference among the connecting components on different layers is further reduced. Specifically, the resistance difference between the first connecting member 410, the third connecting member 420, and the second connecting member 430 may be reduced; when N is greater than or equal to 4, the resistance difference between the connection assemblies arranged on different layers including the first connection assembly 410, the N-1 connection assembly, the N-th connection assembly, and the second connection assembly 430 can be reduced, and the problems of uneven brightness, various marks, and the like of the display panel can be further improved.

According to an embodiment of the present invention, the materials of the first resistance-lowering layer 412, the second resistance-lowering layer 432, the third resistance-lowering layer 422, the N-1 th resistance-lowering layer and the N-th resistance-lowering layer all comprise titanium nitride. Titanium nitride has a very low resistance and is an excellent conductive material. The resistance reducing layer and the transparent conducting layer which are arranged in a stacked mode are connected in parallel, so that the resistance of the connecting component after being connected in parallel is smaller than that of the resistance reducing layer and smaller than that of the transparent conducting layer. Specifically, the first resistance reducing layer 412 is connected in parallel with the first transparent conductive layer 411, and the resistance of the first connecting element 410 after being connected in parallel is smaller than the resistance of the first resistance reducing layer 412 and smaller than the resistance of the first transparent conductive layer 411. The second resistance reducing layer 432 is connected in parallel with the second transparent conductive layer 431, and the resistance of the second connecting assembly 430 after being connected in parallel is smaller than the resistance of the second resistance reducing layer 432 and smaller than the resistance of the second transparent conductive layer 431. Therefore, the resistance of all the connecting components is smaller than that of the titanium nitride, and the resistance difference between the connecting components in different layers can be further reduced due to the fact that the resistance of the titanium nitride is smaller. According to some embodiments of the present invention, the materials of the first resistance-lowering layer 412, the second resistance-lowering layer 432, the third resistance-lowering layer 422, the N-1 th resistance-lowering layer and the N-th resistance-lowering layer may all be titanium nitride.

According to an embodiment of the present invention, the thickness of the first resistance-lowering layer 412 is smaller than that of the second resistance-lowering layer 432, and the thickness of the N-1 th resistance-lowering layer is smaller than that of the N-th resistance-lowering layer. According to some embodiments of the invention, referring to fig. 3-6, the thickness of the third resistance-reducing layer 422 is smaller than the thickness of the second resistance-reducing layer 432, and the thickness of the first resistance-reducing layer 412, the thickness of the third resistance-reducing layer 422, and the thickness of the second resistance-reducing layer 432 increase in sequence. The inventor finds that the resistance of the resistance reducing layer is related to the thickness of the resistance reducing layer, and the resistance is smaller as the thickness is larger, so that the resistance of the first resistance reducing layer 412, the resistance of the third resistance reducing layer 422 and the resistance of the second resistance reducing layer 432 are sequentially reduced, the resistance of the first transparent conductive layer 411, the resistance of the third transparent conductive layer 421 and the resistance of the second transparent conductive layer 431 are gradually increased, the resistance reducing layers arranged in a stacked mode are connected with the transparent conductive layers in parallel, the resistance of the resistance reducing layers and the resistance of the transparent conductive layers are matched with each other, the resistances of any two of the first connecting assembly 410, the third connecting assembly 420 and the second connecting assembly 430 can be close to equal, and the resistance difference among the first connecting assembly 410, the third connecting assembly 420 and the second connecting assembly 430 is further reduced. When N is equal to or greater than 4, the resistance difference between the connection members disposed at different layers including the first connection member 410, the N-1 connection member, the nth connection member, and the second connection member 430 may be further reduced.

According to some embodiments of the invention, referring to fig. 3-6, the first resistance-reducing layer 412 may have a thickness of

For example

The third resistance reducing layer 422 may have a thickness of

For example

The second resistance-reducing layer 432 may have a thickness of

For example

According to the embodiment of the invention, the first resistance reducing layer 412 in the first connecting assembly 410 is arranged close to or far away from the substrate base plate 100, the second resistance reducing layer 432 in the second connecting assembly 430 is arranged close to or far away from the substrate base plate 100, the third resistance reducing layer 422 in the third connecting assembly 420 is arranged close to or far away from the substrate base plate 100, the N-1 resistance reducing layer in the N-1 connecting assembly is arranged close to or far away from the substrate base plate 100, and the N resistance reducing layer in the N connecting assembly is arranged close to or far away from the substrate base plate 100. That is, the present invention does not limit the position of the resistance-lowering layer in the connecting assembly as long as the stacked resistance-lowering layer and the transparent conductive layer can be connected in parallel. The resistance reducing layer in the connecting component is positioned on the side close to the substrate base plate 100 in fig. 2 to 6 of the application, but the position of the resistance reducing layer in the connecting component is not limited to this, and the resistance reducing layer in the connecting component can also be positioned on the side far from the substrate base plate 100, or the resistance reducing layer in some layers is positioned on the side close to the substrate base plate 100, and the resistance reducing layer in other layers is positioned on the side far from the substrate base plate 100.

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

Referring to fig. 3 to 6, the driving circuit 200 is located in the first display area a, and the driving circuit 200 and the first connection member 410 are contact-connected through the first via hole, and thus the first via hole needs to be disposed in the first display area a. The light emitting device 300 is positioned in the second display region B, and the light emitting device 300 and the second connecting member 430 are contact-connected through the fourth through hole, so that the fourth through hole needs to be disposed in the second display region B. The positions of the second through hole and the third through hole are not limited, and can be selected by a person skilled in the art according to use requirements. For example, the positional relationship among the first through hole, the second through hole, the third through hole, and the fourth through hole may satisfy at least one of the following three conditions:

according to some embodiments of the present invention, referring to fig. 3 and 4, an orthographic projection of a first through hole on the substrate base 100 is located in the first display area a, and an orthographic projection of a second through hole on the substrate base 100, an orthographic projection of a third through hole on the substrate base 100, and an orthographic projection of a fourth through hole on the substrate base 100 are located in the second display area B. In the first display area a, the first connection element 410 is overlapped with the driving circuit 200, and in the second display area B, the first connection element 410 is connected with the anode 310 of the light emitting device 300 through the third connection element 420 and the second connection element 430.

According to some embodiments of the present invention, referring to fig. 5, an orthographic projection of a first through hole on the substrate base plate 100 and an orthographic projection of a second through hole on the substrate base plate 100 are both located within the first display area a, and an orthographic projection of a third through hole on the substrate base plate 100 and an orthographic projection of a fourth through hole on the substrate base plate 100 are both located within the second display area B. In the first display area a, the third connecting element 420 is connected with the driving circuit 200 through the first connecting element 410; in the second display region B, the third connecting member 420 is transferred through the second connecting member 430 to overlap the anode 310 of the light emitting device 300.

According to some embodiments of the present invention, referring to fig. 6, an orthographic projection of a first through hole on the substrate base plate 100, an orthographic projection of a second through hole on the substrate base plate 100, and an orthographic projection of a third through hole on the substrate base plate 100 are located within the first display area a, and an orthographic projection of a fourth through hole on the substrate base plate 100 is located within the second display area B. In the first display area a, the second connecting component 430 is connected with the driving circuit 200 through the third connecting component 420 and the first connecting component 410; in the second display region B, the second connection member 430 directly overlaps the anode 310 of the light emitting device 300. At this time, only the second connecting assembly 430 is located in the second display area B, so that the transmittance of the second display area B can be greatly improved.

The present invention further provides a display device, referring to fig. 7-9, the display device includes a display panel 1000 and an off-screen camera 2000, and an orthogonal projection of the off-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. Therefore, the display device has all the features and advantages of the display panel described above, and will not be described herein again. In general, the resistance reducing layer can be connected with the transparent conducting layers in parallel, so that the resistance difference between the transparent conducting layers of different layers can be reduced, and the resistances of the connecting components of different layers are approximately equal. And the total resistance of the parallel circuit is smaller than the minimum parallel resistance, and after the resistance reducing layer is arranged, the total resistance is greatly reduced after parallel connection, so that the resistance difference caused by the inconsistent wiring length of the transparent conducting layers on the same layer can be reduced, and the problems of uneven brightness, various traces and the like of the display device are further solved.

Referring to fig. 7, an area of an orthographic projection of the off-screen camera 2000 on the display panel 1000 may be equal to an area of the second display region B. Referring to fig. 8, an orthographic area of the off-screen camera 2000 on the display panel 1000 may be larger than an area of the second display region B. Referring to fig. 9, the orthographic area of the off-screen camera 2000 on the display panel 1000 may also be smaller than the area of the second display region B. The specific position of the off-screen camera 2000 is not limited, the position of the off-screen camera 2000 can be any one of the three conditions, and the off-screen camera 2000 can have better shooting quality only by ensuring that the orthographic projection of the off-screen camera 2000 on the display panel 1000 has an overlapping area with the second display area B and better light transmittance is ensured.

According to the embodiment of the present invention, the specific type of the display device has no special requirement, and those skilled in the art can flexibly select the display device according to actual requirements. In some embodiments, the display device may be an electronic device having a display function and a photographing function, such as a mobile phone, an iPad, a notebook, a kindle, a game machine, and the like.

Various examples and features of different examples described in this specification can be combined and combined by one skilled in the art without contradiction. In addition, it should be noted that the terms "first", "second" and "third" in this specification are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A display panel comprising a first display region and a second display region, the display panel comprising:

a substrate base plate;

the driving circuit is arranged on one side of the substrate base plate and is positioned in the first display area;

the light-emitting device is arranged on one side, far away from the driving circuit, of the substrate base plate and is positioned in the second display area;

at least two connecting assemblies, wherein the connecting assemblies are used for electrically connecting the driving circuit and the light-emitting device and are positioned between the driving circuit and the light-emitting device in the direction vertical to the substrate base plate, the connecting assemblies comprise a first connecting assembly and a second connecting assembly in the direction of keeping the driving circuit away from the substrate base plate, the first connecting assembly and the second connecting assembly are positioned on different layers, the first connecting assembly is electrically connected with the driving circuit, and the second connecting assembly is electrically connected with the anode of the light-emitting device,

the first connecting assembly comprises a first transparent conducting layer, the second connecting assembly comprises a second transparent conducting layer and a second resistance reducing layer which are arranged in a stacked mode, the resistance of the second resistance reducing layer is smaller than that of the second transparent conducting layer, and the resistance of the first transparent conducting layer is smaller than that of the second transparent conducting layer.

2. The display panel according to claim 1, wherein the first connection assembly further comprises a first resistance reduction layer stacked on the first transparent conductive layer, wherein the first resistance reduction layer has a resistance greater than that of the second resistance reduction layer, and the first resistance reduction layer has a resistance smaller than that of the first transparent conductive layer.

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

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

5. The display panel according to claim 3, wherein the materials of the first transparent conductive layer, the second transparent conductive layer, the N-1 transparent conductive layer and the N transparent conductive layer comprise ITO, and the materials of the first resistance-reducing layer, the second resistance-reducing layer, the N-1 resistance-reducing layer and the N resistance-reducing layer comprise titanium nitride.

6. The display panel according to claim 3, wherein the thickness of the first resistance-lowering layer is smaller than that of the second resistance-lowering layer, and the thickness of the N-1 th resistance-lowering layer is smaller than that of the N-th resistance-lowering layer.

7. The display panel according to claim 1, characterized in that the display panel further comprises:

the first flat layer is arranged between the driving circuit and the first connecting assembly, and the first connecting assembly is electrically connected with the driving circuit through a first through hole penetrating through the first flat layer;

the second flat layer is arranged on one side, away from the first flat layer, of the first connecting component;

the third connecting assembly is arranged on the surface, far away from the first flat layer, of the second flat layer and is electrically connected with the first connecting assembly through a second through hole penetrating through the second flat layer;

a third planar layer disposed between the third connection assembly and a second connection assembly electrically connected to the third connection assembly through a third through hole passing through the third planar layer;

a fourth planar layer disposed between the second connection assembly and the anode, the anode being electrically connected to the second connection assembly through a fourth via that penetrates the fourth planar layer;

a pixel defining layer on a surface of the fourth planar layer distal from the substrate base plate.

8. The display panel according to claim 7, wherein an orthographic projection of the first through hole on the substrate base plate is located in a first display area, and wherein an orthographic projection of the second through hole on the substrate base plate, an orthographic projection of the third through hole on the substrate base plate, and an orthographic projection of the fourth through hole on the substrate base plate are located in a second display area.

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

10. The display panel according to claim 7, wherein an orthographic projection of the first through hole on the substrate base plate, an orthographic projection of the second through hole on the substrate base plate, and an orthographic projection of the third through hole on the substrate base plate are located in a first display area, and an orthographic projection of the fourth through hole on the substrate base plate is located in a second display area.

11. A display device, comprising:

the display panel of any one of claims 1 to 10;

and the orthographic projection of the camera under the screen on the display panel and the second display area have an overlapping area.