CN110224079B - Display substrate, manufacturing method and display device - Google Patents
Display substrate, manufacturing method and display device Download PDFInfo
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- CN110224079B CN110224079B CN201910515551.4A CN201910515551A CN110224079B CN 110224079 B CN110224079 B CN 110224079B CN 201910515551 A CN201910515551 A CN 201910515551A CN 110224079 B CN110224079 B CN 110224079B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
Abstract
The invention provides a display substrate, a manufacturing method and a display device, wherein the display substrate comprises a display area and a binding area positioned on one side of the display area, an anode layer, a light emitting layer, a cathode layer and a cathode wire are arranged in the display area, a first edge of the cathode layer is in lap joint with the cathode wire, the first edge is the edge of the cathode layer in a first extending direction, the first extending direction is the direction from the edge far away from the binding area to the edge close to the binding area of the cathode layer, the cathode layer comprises at least two partitions in the first extending direction, and the resistance value of the partition close to the binding area is larger than that of the partition far away from the binding area. The display substrate provided by the embodiment of the invention can effectively improve the uniformity of brightness and improve color deviation, and has the advantages of simple structure and easiness in manufacturing.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display substrate, a manufacturing method and a display device.
Background
With the rapid development of the electronic industry, the demand of electronic products is higher and higher, and the brightness of the current OLED device is not uniform, and the brightness of the general electronic product in the area near the Pad is higher than the brightness far away from the Pad, that is, the resistance near the Pad is lower than the resistance far away from the Pad, resulting in poor brightness uniformity of the OLED device, and thus, the requirements of brightness uniformity and good curvature cannot be met.
In the prior art, the resistance value is reduced by modifying the wiring design, which is relatively complicated in structural design.
Disclosure of Invention
In view of the above, the present invention provides a display substrate, a manufacturing method thereof and a display apparatus, so as to solve the problems of poor brightness uniformity and complex structure of an OLED device.
In order to solve the above technical problem, the display substrate provided in an embodiment of the first aspect of the present invention includes a display area and a binding area located on one side of the display area, where an anode layer, a light emitting layer, a cathode layer, and a cathode trace are disposed in the display area, a first edge of the cathode layer is overlapped with the cathode trace, the first edge is an edge of the cathode layer in a first extending direction, the first extending direction is a direction from the edge of the cathode layer far from the binding area to the edge close to the binding area, the cathode layer includes at least two segments in the first extending direction, and a resistance value of the segment close to the binding area is greater than a resistance value of the segment far from the binding area.
Preferably, the first edge is provided with at least one notch, which divides the cathode layer into at least two sections.
Preferably, a width of the notch in a second extending direction of the cathode layer is greater than a width of the cathode trace, and the second extending direction is a direction perpendicular to the first extending direction.
Preferably, the notch is rectangular.
Preferably, the sum of the resistance of each said partition and the resistance of the corresponding cathode trace is the same;
the cathode wire corresponding to the partition is a cathode wire between a position where the cathode wire is overlapped with one end of the partition, which is far away from the binding area, and one end of the cathode wire, which is close to the binding area.
In a second aspect of the present invention, a method for manufacturing a display substrate includes a display area and a bonding area located on one side of the display area, the method includes:
the method comprises the steps that an anode layer, a light emitting layer, a cathode layer and a cathode wire are formed in a display area, a first edge of the cathode layer is in lap joint with the cathode wire, the first edge is the edge of the cathode layer in a first extending direction, the first extending direction is the direction from the edge far away from a binding area to the edge close to the binding area, the cathode layer comprises at least two partitions in the first extending direction, and the resistance value of the partition close to the binding area is larger than that of the partition far away from the binding area.
Preferably, the first edge has at least one notch formed thereon, the at least one notch dividing the cathode layer into at least two partitions.
Preferably, the sum of the resistance of each partition and the resistance of the corresponding cathode wire is the same;
the cathode wire corresponding to the partition is a cathode wire between a position where the cathode wire is overlapped with one end of the partition, which is far away from the binding area, and one end of the cathode wire, which is close to the binding area.
A display device according to an embodiment of the third aspect of the present invention includes the display substrate according to the above embodiment.
Preferably, the display device is a vehicle lamp.
The technical scheme of the invention has the following beneficial effects:
according to the display substrate provided by the embodiment of the invention, the structure of the cathode layer is improved, the cathode layer comprises at least two subareas in the first extending direction, wherein the resistance value of the subarea close to the binding area is larger than that of the subarea far away from the binding area, so that the uniformity of the brightness of the display substrate can be effectively improved, the color deviation is improved, and the structure is simple and easy to manufacture.
Drawings
FIG. 1 is a schematic structural diagram of a cathode layer of a display substrate according to the present invention;
fig. 2 is a schematic structural view illustrating a cathode layer, a cathode trace and a bonding area of a display substrate according to the present invention.
Reference numerals:
a cathode layer 10; a first edge 11; a notch 12;
a cathode trace 20;
a binding region 30; a gasket 31.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the description of the embodiments of the invention given above, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
The following exemplifies a display substrate according to an embodiment of the present invention.
As shown in fig. 1 and 2, the display substrate according to the embodiment of the present invention includes a display region and a bonding region 30 located at one side of the display region.
Specifically, an anode layer, a light emitting layer, a cathode layer 10 and a cathode wire 20 are arranged in the display area, a first edge 11 of the cathode layer 10 is overlapped with the cathode wire 20, the first edge 11 is an edge of the cathode layer 10 in a first extending direction, the first extending direction is a direction from the edge far away from the binding area 30 to the edge near the binding area 30 of the cathode layer 10, the cathode layer 10 includes at least two partitions in the first extending direction, and a resistance value of the partition near the binding area 30 is greater than a resistance value of the partition far away from the binding area 30.
That is to say, one end of the cathode trace 20 is overlapped with the first edge 11 of the cathode layer 10, the other end is overlapped with the gasket 31 of the bonding region, the first edge 11 is disposed in the first extending direction of the cathode layer 10, at least two partitions may be disposed in the first extending direction of the cathode layer 10, and the resistance values of the two partitions are set according to the distance between each partition and the bonding region 30, that is, the resistance value of the partition farther away from the bonding region 30 is smaller, so that the influence of the voltage drop on the brightness of the display substrate can be compensated, and the uniformity of the brightness of the display substrate can be improved.
It should be noted that, the partition of the present invention can be set as a plurality of (two or more) partitions as required, and the uniformity of the brightness of the display substrate can be further improved by the plurality of partitions with different resistance values, so as to improve the color deviation and meet the requirements of customers.
Therefore, according to the display substrate of the embodiment of the invention, the cathode layer 10 is provided as at least two sub-regions, and each sub-region is provided with the resistance value according to the distance from the bonding region 30, that is, the resistance value is smaller as the sub-region is farther away from the bonding region 30, so that the problem of uneven brightness of the display substrate can be effectively solved, the requirements of customers on brightness uniformity and color deviation are met, and the structure is simple and easy to manufacture.
As a preferred embodiment of the present invention, the first edge 11 is provided with at least one notch 12, and the at least one notch 12 divides the cathode layer 10 into at least two sections.
That is, by providing the notches 12 on the first edge 11 of the cathode layer 10, it is possible to divide the cathode layer 10 into the plurality of segments having different resistance values in the first extending direction of the cathode layer 10, wherein the resistance value of the segment farther from the bonding region 30 is smaller, and when the notches 12 are provided in plurality, the plurality of notches 12 divide the cathode layer 10 into the plurality of segments in the first extending direction, and thereby it is possible to further achieve the uniformity of the luminance of the display substrate.
As another preferred embodiment of the present invention, the width of the notch 12 in the second extending direction of the cathode layer 10 is larger than the width of the cathode trace 20, and the second extending direction is a direction perpendicular to the first extending direction.
In other words, as shown in fig. 1, the cathode layer 10 is a rectangular structure, wherein a long side of the rectangular structure is a first edge 11 and is disposed in a first extending direction of the cathode layer 10, a short side perpendicular to the long side is disposed in a second extending direction of the cathode layer 10, the notch 12 is a notch 12 recessed from an outer edge of the long side toward the second extending direction and having a certain depth, wherein the depth of the notch 12, i.e., the width in the second extending direction, is greater than the width of the cathode trace 20, so that it can be ensured that the edge of the cathode layer 10 in the notch 12 portion does not overlap with the cathode trace 20, and uniformity of brightness of the display substrate is ensured.
Preferably, the gap 12 is rectangular, which facilitates the fabrication and improves the fabrication efficiency of the cathode layer 10.
As another embodiment of the present invention, the resistance of each partition is the same as the sum of the resistances of the cathode traces 20 corresponding to the partitions, wherein the cathode trace 20 corresponding to the partition is the cathode trace 20 from the position where the cathode trace 20 overlaps with the end of the partition far from the bonding region 30 to the end of the cathode trace 20 close to the bonding region 30.
That is, as shown in fig. 2, the cathode layer 10 is provided with three sub-regions, which are arranged in order from the near to the far from the bonding region 30, and are respectively a first sub-region, a second sub-region and a third sub-region, the cathode lines 20 corresponding to the respective sub-regions are respectively the cathode lines 20 from the bonding region 30 to the end of the respective sub-regions far from the bonding region 30, assuming that the resistance value of the first sub-region is R1, the resistance value of the second sub-region is R2, the resistance value of the third sub-region is R3, the resistance values of the cathode lines 20 corresponding to the respective sub-regions are R4, R5 and R6, and when R1+ R4 + R2+ R5 is R3+ R6, the currents flowing to the respective sub-regions are equal, and the voltages of the respective sub-regions are equal, thereby achieving uniformity of the luminance of the display substrate.
The manufacturing method of the display substrate according to the embodiment of the second aspect of the present invention, the display area and the bonding area 30 located at one side of the display area, includes forming an anode layer, a light emitting layer, a cathode layer 10 and a cathode trace 20 in the display area, where a first edge 11 of the cathode layer 10 is overlapped with the cathode trace 20, the first edge 11 is an edge of the cathode layer 10 in a first extending direction, the first extending direction is a direction from an edge of the cathode layer 10 far from the bonding area 30 to an edge close to the bonding area 30, the cathode layer 10 includes at least two partitions in the first extending direction, and a resistance value of the partition close to the bonding area 30 is greater than a resistance value of the partition far from the bonding area 30.
That is to say, the first edge 11 of the cathode layer 10 is overlapped with the cathode trace 20, at least two partitions may be disposed in the first extending direction of the cathode layer 10, and the resistance values of the two partitions are set according to the distance between each partition and the bonding region 30, that is, the resistance value of the partition farther away from the bonding region 30 is smaller, so as to compensate the influence of the voltage drop on the brightness of the display substrate, and improve the uniformity of the brightness of the display substrate.
Preferably, at least one notch 12 is formed on the first edge 11, the at least one notch 12 divides the cathode layer 10 into at least two partitions, and the cathode layer 10 is divided into partitions with different resistance values by disposing the notch 12, so as to achieve uniformity of brightness of the display substrate.
Preferably, the manufacturing method of the display substrate further includes that the sum of the resistance of each partition and the resistance of the corresponding cathode trace 20 is the same, where the cathode trace 20 corresponding to the partition is the cathode trace 20 between the position where the cathode trace 20 is overlapped with one end of the partition far from the bonding region 30 and one end of the cathode trace 20 close to the bonding region 30. The structure can ensure that the current flowing to each subarea is equal, and the voltage shared by each subarea is equal, so that the uniformity of the brightness of the display substrate is improved, and the problem of color deviation can be improved.
The display substrate according to the embodiment of the present invention is the display substrate according to the above embodiment, and the structure and the technical effects thereof have been described in detail in the above embodiment, and specific reference may be made to the display substrate according to the above embodiment, which is not repeated herein.
According to the manufacturing method of the display substrate provided by the embodiment of the invention, the uniformity of the brightness of the display substrate can be realized and the color deviation can be improved by changing the structure of the cathode layer 10, and the manufacturing method is simple.
The display device according to the third aspect of the present invention includes the display substrate according to the above embodiment, and since the structure and effect of the display substrate have been described in detail in the above embodiment, reference may be made to the display substrate according to the above embodiment, and details are not repeated herein.
Preferably, the display device is a car light, but other embodiments of the present invention may also be a display screen, and the present invention is not limited herein.
The display device of the embodiment can realize the uniformity of the brightness and improve the color deviation.
The foregoing is a preferred embodiment of the present invention, and it should be noted that it would be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the invention, and such modifications and enhancements are also considered to be within the scope of the invention.
Claims (6)
1. A display substrate is characterized by comprising a display area and a binding area positioned on one side of the display area, wherein an anode layer, a light emitting layer, a cathode layer and a cathode wire are arranged in the display area, a first edge of the cathode layer is in lap joint with the cathode wire, the first edge is the edge of the cathode layer in a first extending direction, the first extending direction is the direction from the edge far away from the binding area to the edge close to the binding area of the cathode layer, the cathode layer comprises at least two partitions in the first extending direction, and the resistance value of the partition close to the binding area is larger than that of the partition far away from the binding area;
the first edge is provided with at least one notch, the cathode layer is divided into at least two partitions by the at least one notch, the areas of different partitions are different, and the edge of the cathode layer of the notch part is not lapped with the cathode routing wire;
each partition is in lap joint with the cathode wire; between different subareas, the sum of the subarea resistance and the resistance of the corresponding cathode wire is the same;
the cathode wire corresponding to the partition is a cathode wire between a position where the cathode wire is overlapped with one end of the partition, which is far away from the binding area, and one end of the cathode wire, which is close to the binding area.
2. The display substrate of claim 1, wherein a width of the notch in a second extending direction of the cathode layer is greater than a width of the cathode trace, and the second extending direction is a direction perpendicular to the first extending direction.
3. The display substrate of claim 1 or 2, wherein the notch is rectangular.
4. A manufacturing method of a display substrate, the display substrate comprising a display area and a binding area located at one side of the display area, the manufacturing method comprising:
forming an anode layer, a light emitting layer, a cathode layer and a cathode wire in the display area, wherein a first edge of the cathode layer is overlapped with the cathode wire, the first edge is an edge of the cathode layer in a first extending direction, the first extending direction is a direction from the edge far away from the binding area to the edge close to the binding area, the cathode layer comprises at least two partitions in the first extending direction, and the resistance value of the partition close to the binding area is greater than that of the partition far away from the binding area;
at least one notch is formed on the first edge, the cathode layer is divided into at least two partitions by the at least one notch, the areas of different partitions are different, and the edge of the cathode layer of the notch part is not overlapped with the cathode routing;
each partition is in lap joint with the cathode wire; between different subareas, the sum of the subarea resistance and the resistance of the corresponding cathode wire is the same;
the cathode wire corresponding to the partition is a cathode wire between a position where the cathode wire is overlapped with one end of the partition, which is far away from the binding area, and one end of the cathode wire, which is close to the binding area.
5. A display device comprising the display substrate according to any one of claims 1 to 3.
6. The display device according to claim 5, wherein the display device is a vehicle lamp.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515551.4A CN110224079B (en) | 2019-06-14 | 2019-06-14 | Display substrate, manufacturing method and display device |
| PCT/CN2020/095368 WO2020249008A1 (en) | 2019-06-14 | 2020-06-10 | Display substrate, manufacturing method, and display device |
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| CN201910515551.4A CN110224079B (en) | 2019-06-14 | 2019-06-14 | Display substrate, manufacturing method and display device |
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| CN110224079A CN110224079A (en) | 2019-09-10 |
| CN110224079B true CN110224079B (en) | 2022-06-14 |
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| CN110224079B (en) * | 2019-06-14 | 2022-06-14 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method and display device |
| CN112490229B (en) * | 2020-11-30 | 2022-08-09 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
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| WO2020249008A1 (en) | 2020-12-17 |
| CN110224079A (en) | 2019-09-10 |
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