CN111667764A - Flexible display panel and display device - Google Patents
Flexible display panel and display device Download PDFInfo
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- CN111667764A CN111667764A CN202010597789.9A CN202010597789A CN111667764A CN 111667764 A CN111667764 A CN 111667764A CN 202010597789 A CN202010597789 A CN 202010597789A CN 111667764 A CN111667764 A CN 111667764A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The invention provides a flexible display panel, which is characterized in that metal wires in a bending area are arranged into a parallel two-layer structure: the first layer is walked line and the second floor is walked line, set up first metal breakpoint and second metal breakpoint respectively on the first layer is walked line and the second floor and release flexible display panel and walk the produced stress of line to the metal in the in-process of buckling, first metal breakpoint and second metal breakpoint are in the first layer and walk the dislocation set in the extending direction of line of second floor and walk the line through walking at the first layer and set up many bridging between the line is walked to the second floor, can realize that the first layer is walked the electricity of line and the second floor is walked line and is connected, guarantee the electrically conductive function of metal wiring.
Description
Technical Field
The invention relates to the technical field of display panels, in particular to a flexible display panel and a display device.
Background
With the rapid development of the flexible display technology, products with flexible narrow frames and high screen ratio are favored by the market, especially portable flexible mobile terminal products. The bendable display panel not only can provide large-screen display, but also can improve portability. However, the metal wire in the bendable display panel is poor in bending performance, and the metal wire is broken due to too large bending amplitude or too small bending radius in the process of excessive bending, so that the display function of the bendable display panel is affected. Therefore, in order to improve the bending performance and reliability of the bendable display panel, it is necessary to develop a metal routing structure capable of reducing the bending stress.
Disclosure of Invention
In view of this, embodiments of the present invention are directed to provide a flexible display panel, which solves the problem that the metal traces are easy to break during the bending process.
According to an aspect of the present invention, an embodiment of the present invention provides a flexible display panel, including: the metal routing device comprises a bending area and a metal routing arranged in the bending area; the metal wires comprise a first layer of wires, a second layer of wires and a plurality of bridging wires, wherein the first layer of wires, the second layer of wires and the plurality of bridging wires are arranged in parallel, the first layer of wires comprise at least one first metal breakpoint, the second layer of wires comprise at least one second metal breakpoint, and the first layer of wires at two ends of each first metal breakpoint are respectively connected with the second layer of wires through the bridging wires; the second layer of wires at two ends of each second metal breakpoint are respectively connected with the first layer of wires through the bridging wires; the at least one first metal breakpoint and the at least one second metal breakpoint are arranged in a staggered mode in the extending direction of the first layer of wiring and the second layer of wiring.
In an embodiment, the first layer of traces includes a plurality of the first metal discontinuities thereon.
In an embodiment, the second layer of traces includes a plurality of second metal breakpoints thereon.
In an embodiment, adjacent bridging traces of the plurality of bridging traces include one of the first metal break point and the second metal break point.
In an embodiment, a first chamfer is disposed at a connection position of the bridge trace and the first layer trace; and/or a second chamfer is arranged at the connecting position of the bridging routing and the second layer routing.
In an embodiment, the first chamfer comprises a 45 degree chamfer; and/or the second chamfer comprises a 45 degree chamfer.
In an embodiment, a first included angle between the bridging trace and the first layer trace is less than or equal to 90 degrees; and/or a second included angle between the bridging trace and the second layer of trace is less than or equal to 90 degrees.
In an embodiment, a distance between two connection points of the bridging trace and the first layer trace at two ends of the first metal breakpoint is greater than a distance between the two connection points of the bridging trace and the second layer trace; the distance between the two bridging wires at the two ends of the second metal breakpoint and the connection point of the second layer wire is larger than the distance between the two bridging wires and the connection point of the first layer wire.
In an embodiment, the plurality of bridging traces are parallel to each other.
According to another aspect of the present invention, an embodiment of the present invention provides a flexible display device, including the flexible display panel as described in any one of the above.
According to the flexible display panel provided by the embodiment of the invention, the metal wires in the bending area are arranged into a parallel two-layer structure: the first layer is arranged with the second layer, the first layer and the second layer are respectively provided with a first metal breakpoint and a second metal breakpoint to release the stress generated by the metal wiring in the bending process of the flexible display panel, the first metal breakpoint and the second metal breakpoint are arranged in a staggered manner in the extending direction of the first layer and the second layer, and a plurality of bridging wirings are arranged between the first layer and the second layer, so that the electric connection between the first layer and the second layer can be realized, and the conductive function of the metal wiring is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a flexible display panel according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a flexible display panel according to another embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Further, in the exemplary embodiments, since the same reference numerals denote the same components having the same structure or the same steps of the same method, if an embodiment is exemplarily described, only a structure or a method different from the already described embodiment is described in other exemplary embodiments.
Throughout the specification and claims, when one element is described as being "connected" to another element, the one element may be "directly connected" to the other element or "electrically connected" to the other element through a third element. Furthermore, unless explicitly described to the contrary, the term "comprising" and its corresponding terms should only be taken as including the stated features, but should not be taken as excluding any other features.
The Panel Chip (COP) technology uses Panel turnover, and can greatly reduce the size of the lower frame. However, the bending resistance of the wires in the bending area is poor, and when the wires are bent or folded, the metal wires in the bending area are prone to fracture and crack in the bending area, so that abnormal display or abnormal touch function is caused, and finally the reliability of the display panel is poor. Most of the existing methods for protecting metal wires in a bending area are to coat a layer of protective glue on the bending area and protect the metal wires with the protective glue, or to arrange multiple layers of metal wires in the bending area and ensure that the display function of the display panel can still be ensured under the condition that part of the metal wires are broken with the multiple layers of metal wires. However, the curing rate of the protective glue is difficult to control and is easily affected by temperature and humidity, so that the performance of the protective glue is difficult to ensure, that is, the stability of the protective glue is poor, so that the protective effect of the protective glue on the metal wiring is poor; the multilayer metal wiring is essentially passively protected by a redundancy design scheme, the structure only delays the occurrence of abnormity of the display panel but cannot avoid the fracture of the metal wiring, namely the multilayer metal wiring cannot fundamentally reduce the bending stress on the metal wiring, the condition that the multilayer metal wiring is simultaneously fractured is likely to occur when the bending radius is too small or the bending angle is too large, and the difficulty of the process is increased by arranging the multilayer metal wiring.
In order to solve the above problem, an embodiment of the present application provides a flexible display panel, set up the metal of bending zone to be parallel two-layer structure through walking the line, walk line and second layer including the first layer promptly, and walk the line and set up first metal breakpoint and second metal breakpoint on the line is walked to the first layer respectively and the second layer is walked and is released the flexible display panel and walk produced stress to the metal in-process of buckling, and, first metal breakpoint and second metal breakpoint are in the first layer is walked the line and is walked the dislocation set in the extending direction of line and second layer and walk the line through setting up many bridging between the line is walked to the first layer and the second layer, can realize that the first layer is walked the electric connection of line and second layer, guarantee the electrically conductive function of whole metal wiring.
Fig. 1 is a schematic structural diagram of a flexible display panel according to an embodiment of the present disclosure. As shown in fig. 1, the flexible display panel includes: the metal wiring structure comprises a bending area 1 and a metal wiring 10 arranged in the bending area 1; the metal trace 10 includes a first layer trace 11, a second layer trace 12 and a plurality of bridging traces 13 connecting the first layer trace 11 and the second layer trace 12, which are arranged in parallel, the first layer trace 11 includes at least one first metal breakpoint 110, the second layer trace 12 includes at least one second metal breakpoint 120, and the first layer traces 11 at two ends of each first metal breakpoint 110 are connected with the second layer trace 12 through the bridging traces 13 respectively; the second layer trace 12 at two ends of each second metal breakpoint 120 is connected with the first layer trace 11 through a bridging trace 13; the first metal breakpoint 110 and the second metal breakpoint 120 are disposed in a staggered manner in the extending direction of the first layer trace 11 and the second layer trace 12. Because the flexible display panel can generate a bending stress along the laminating direction of the film layer of the flexible display panel to the metal wire 10 in the bending area 1 in the bending process, and the ability of the metal wire 10 in the bending area 1 to release the stress is poor, when the bending radius is small or the bending angle is too large, i.e. the bending stress generated to the metal wire 10 is too large, the metal wire 10 is likely to be broken, thereby causing the display abnormality or the touch function abnormality of the display panel. This application embodiment is walked 11 and the second floor is walked line 12 through setting up the first layer to walk 11 and set up first metal breakpoint 110 and second metal breakpoint 120 on the line 12 is walked to the second floor at the first layer respectively, utilize first metal breakpoint 110 and the stress of buckling that the release of second metal breakpoint 120 produced, thereby improve the anti bending performance of metal wiring 10, display panel's bendable performance and reliability have been improved, display panel's the radius of buckling can accomplish littleer simultaneously, thickness also can accomplish littleer. Since the first metal breakpoint 110 and the second metal breakpoint 120 may affect the conductivity of the first layer trace 11 and the second layer trace 12, in the embodiment of the present application, the bridging trace 13 is disposed between the first layer trace 11 and the second layer trace 12, the first layer traces 11 at two ends of each first metal breakpoint 110 are respectively connected to the second layer trace 12 through the bridging trace 13, and the second metal breakpoint 120 is not included between the connection points of the two bridging traces 13 respectively connected to the first layer traces 11 at two ends of the first metal breakpoint 110 and the second layer trace 12; the second layer of wires 12 at the two ends of each second metal breakpoint 120 are connected to the first layer of wires 11 through the bridging wires 13, and two bridging wires 13 connected to the second layer of wires 12 at the two ends of each second metal breakpoint 120 do not include the first metal breakpoint 110 between the connection points of the first layer of wires 11 and the two bridging wires 13 connected to the second layer of wires 12, that is, the two ends of each first metal breakpoint 110 are connected through the bridging wires 13, and the two ends of each second metal breakpoint 120 are connected through the bridging wires 13, so that the first layer of wires 11 and the second layer of wires 12 are conductively connected by using the bridging wires 13, the influence of the first metal breakpoint 110 and the second metal breakpoint 120 on the conductivity of the first layer of wires 11 and the second layer of wires 12 is avoided, and the conductivity of the metal wires 10 is ensured.
In the flexible display panel provided by the embodiment of the invention, the metal wire 10 of the bending area 1 is set to be a parallel two-layer structure: first layer is walked line 11 and second floor and is walked line 12, set up first metal breakpoint 110 and second metal breakpoint 120 respectively on first layer is walked line 11 and the second floor and walk line 12 and release the produced stress of metal line 10 in the flexible display panel bending process, first metal breakpoint 110 and second metal breakpoint 120 dislocation set in the extending direction of first layer is walked line 11 and second floor and is walked line 12 and set up bridging between first layer is walked line 11 and second floor and walk line 12 and walk line 13, can realize that first layer is walked the electric connection of line 11 and second floor and walk line 12, guarantee the electrically conductive function of metal line 10.
The preparation method of the metal trace 10 in the above embodiment may be as follows: a second layer of wires 12 with a second metal breakpoint 120, a bridging wire 13 connected with the second layer of wires 12, and a first layer of wires 11 with a first metal breakpoint 110 and connected with the bridging wire 13 are sequentially prepared from one side of the bending area 1 to the other side of the bending area 1; or the continuous second layer trace 12 may be prepared first, and the second metal breakpoint 120 is formed on the second layer trace 12 by etching or the like, then the bridging trace 13 connected to the second layer trace 12 is prepared, and finally the continuous first layer trace 11 connected to the bridging trace 13 is prepared, and the first metal breakpoint 110 is formed on the first layer trace 11 by etching or the like.
In an embodiment, a flexible material may be disposed at the first metal break 110 and/or the second metal break 120. The bending stress can be further relieved and released by arranging the flexible material to supplement the metal break points, and it should be understood that the embodiment of the present application can select the materials of the first metal break point 110 and the second metal break point 120 according to the requirements of the practical application scenario, for example, a void structure can be arranged at the first metal break point 110 and/or the second metal break point 120, and the bending stress is released by using air or inert gas in the void structure, as long as the selected materials of the first metal break point 110 and the second metal break point 120 can release the influence of the bending stress on the metal wiring 10, and the embodiment of the present application does not limit the specific materials of the first metal break point 110 and the second metal break point 120.
In an embodiment, as shown in fig. 1, the first layer trace 11 can include a plurality of first metal discontinuities 110 thereon, and/or the second layer trace 12 can include a plurality of second metal discontinuities 120 thereon. Through setting up a plurality of first metal breakpoints 110 and a plurality of second metal breakpoints 120, can utilize a plurality of first metal breakpoints 110 and a plurality of second metal breakpoints 120 evenly to release the stress of buckling that the first layer was walked line 11 and second layer and was walked line 12 each department, avoid apart from first metal breakpoint 110 and second metal breakpoint 120 the position far away received buckle stress too big and lead to the fracture. It should be understood that, in the embodiment of the present application, the specific number of the first metal break points 110 and the second metal break points 120 may be selected according to the requirement of an actual application scenario, as long as the selected specific number of the first metal break points 110 and the second metal break points 120 can release the influence of the bending stress on the metal traces 10, and the specific number of the first metal break points 110 and the second metal break points 120 is not limited in the embodiment of the present application.
In one embodiment, as shown in fig. 1, a first metal breakpoint 110 or a second metal breakpoint 120 is included between adjacent bridging traces 13 in the plurality of bridging traces 13. The first layer trace 11 and the second layer trace 12 can be electrically connected by using a plurality of bridging traces 13, and in this embodiment, only one first metal breakpoint 110 or second metal breakpoint 120 (taking one first stress release point 110 as an example) is included between adjacent bridging traces 13, so that the second layer trace 12, which is not provided with the second metal breakpoint 120, between the adjacent bridging traces 13 and the adjacent bridging traces 13 is used to realize the connection of the first layer traces 11 at two ends of the first metal breakpoint 110 between the adjacent bridging traces 13, that is, the first layer trace 11 at two ends of the first metal breakpoint 110 is electrically connected by using the bridging traces 13, and the electrical conductivity of the metal trace 10 is ensured. It should be understood that the number of bridging traces 13 in the embodiment of the present application should correspond to the number of first metal discontinuities 110 and second metal discontinuities 120, that is, as long as the number of bridging traces 13 can satisfy the conductive communication between the first layer trace 11 and the second layer trace 12.
In an embodiment, as shown in fig. 1, a first chamfer 14 may be disposed at a connection position of the bridge trace 13 and the first layer trace 11; and/or a second chamfer 15 may be provided at the connection location of the bridge trace 13 with the second layer trace 12. The first chamfer 14 is arranged at the connecting position of the bridging trace 13 and the first layer trace 11, so that the bending strength of the connecting position can be increased, and the phenomenon that the bridging trace 13 and the first layer trace 11 are broken or fall off due to overlarge bending angle or undersize bending radius is avoided; the second chamfer 15 is arranged at the connecting position of the bridging trace 13 and the second layer trace 12, so that the bending strength of the connecting position can be increased, and the phenomenon that the bridging trace 13 and the second layer trace 12 are broken or fall off due to overlarge bending angle or undersize bending radius is avoided. In further embodiments, the first chamfer 14 may comprise a 45 degree chamfer; and/or the second chamfer 15 may comprise a 45 degree chamfer. Through setting up first chamfer 14 for 45 degrees chamfers, the second chamfer is 45 degrees chamfers, can guarantee that the bridging is walked line 13 and is walked line 11, the second floor and walk the joint position both sides of line 12 the intensity of buckling unanimous with the first layer, and the bridging is walked line 13 and can both be guaranteed to its intensity of buckling to any one side in the course of buckling promptly. It should be understood that the specific angles of the first chamfer 14 and the second chamfer 15 may be selected according to the requirements of practical application scenarios, for example, the specific angles may be 30 degrees, 60 degrees, and the like, as long as the selected specific angles of the first chamfer 14 and the second chamfer 15 can increase the bending strength of the connection position, and the specific angles of the first chamfer 14 and the second chamfer 15 are not limited in the embodiments of the present application.
Fig. 2 is a schematic structural diagram of a flexible display panel according to another embodiment of the present application. As shown in fig. 2, a first included angle α between the bridge trace 13 and the first layer trace 11 may be smaller than or equal to 90 degrees; and/or the second angle β between the bridging trace 13 and the second layer trace 12 may be smaller than or equal to 90 degrees. Because the length of the bridging trace 13 perpendicular to the first layer trace 11 and the second layer trace 12 is the shortest, and the bending stress (the bending stress received by the bridging trace 13/the length of the bridging trace 13) at each point on the bridging trace 13 is the largest in the bending process, the bridging trace 13 in the embodiment of the present application may not be perpendicular to the first layer trace 11 and the second layer trace 12, that is, the length of the bridging trace 13 is increased, and the bending stress received by each point on the bridging trace 13 is reduced, thereby further improving the bending resistance of the bridging trace 13, of course, the bridging trace 13 in the embodiment of the present application may also be perpendicular to the first layer trace 11 and the second layer trace 12, so as to reduce the manufacturing difficulty.
In an embodiment, as shown in fig. 2, a distance between connection points of the two bridging traces 13 at two ends of the first metal breakpoint 110 and the first layer trace 11 may be greater than a distance between connection points of the two bridging traces 13 and the second layer trace 12; the distance between the connection points of the two bridge traces 13 at the two ends of the second metal breakpoint 120 and the second layer trace 12 can be greater than the distance between the connection points of the two bridge traces 13 and the first layer trace 11. That is, the inclination direction of the bridging trace 13 is the same as the bending direction, which is beneficial to releasing the bending stress generated in the bending process, and further improves the performance of the metal trace 10 in releasing the bending stress.
According to another aspect of the present invention, an embodiment of the present invention provides a flexible display device, including the flexible display panel as described in any one of the above. In the flexible display device provided by the embodiment of the invention, the metal wires in the bending area are arranged into a parallel two-layer structure: the first layer is arranged with the second layer, the first layer and the second layer are respectively provided with a first metal breakpoint and a second metal breakpoint to release the stress generated by the metal wiring in the bending process of the flexible display panel, the first metal breakpoint and the second metal breakpoint are arranged in a staggered manner in the extending direction of the first layer and the second layer, and a plurality of bridging wirings are arranged between the first layer and the second layer, so that the electric connection between the first layer and the second layer can be realized, and the conductive function of the metal wiring is ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (10)
1. A flexible display panel, comprising:
the metal routing device comprises a bending area and a metal routing arranged in the bending area;
the metal wires comprise a first layer of wires, a second layer of wires and a plurality of bridging wires, wherein the first layer of wires, the second layer of wires and the plurality of bridging wires are arranged in parallel, the first layer of wires comprise at least one first metal breakpoint, the second layer of wires comprise at least one second metal breakpoint, and the first layer of wires at two ends of each first metal breakpoint are connected with the second layer of wires through the bridging wires; the second layer of wires at two ends of each second metal breakpoint are respectively connected with the first layer of wires through one bridging wire; the at least one first metal breakpoint and the at least one second metal breakpoint are arranged in a staggered mode in the extending direction of the first layer of wiring and the second layer of wiring.
2. The flexible display panel of claim 1, wherein the first layer of traces comprises a plurality of the first metal discontinuities thereon.
3. The flexible display panel of claim 1, wherein the second layer of traces includes a plurality of the second metal discontinuities thereon.
4. The flexible display panel according to claim 1, wherein adjacent bridge traces of the plurality of bridge traces include one of the first metal break or one of the second metal break.
5. The flexible display panel according to claim 1, wherein a first chamfer is provided at a connection position of the bridge trace and the first layer trace; and/or a second chamfer is arranged at the connecting position of the bridging routing and the second layer routing.
6. The flexible display panel of claim 5, wherein the first chamfer comprises a 45 degree chamfer; and/or the second chamfer comprises a 45 degree chamfer.
7. The flexible display panel according to claim 1, wherein a first included angle between the bridge trace and the first layer trace is less than or equal to 90 degrees; and/or a second included angle between the bridging trace and the second layer of trace is less than or equal to 90 degrees.
8. The flexible display panel according to claim 7, wherein a distance between connection points of the two bridge traces at two ends of the first metal breakpoint and the first layer trace is greater than a distance between connection points of the two bridge traces and the second layer trace; the distance between the two bridging wires at the two ends of the second metal breakpoint and the connection point of the second layer wire is larger than the distance between the two bridging wires and the connection point of the first layer wire.
9. The flexible display panel of claim 1, wherein the plurality of bridge traces are parallel to each other.
10. A flexible display device comprising a flexible display panel according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010597789.9A CN111667764A (en) | 2020-06-28 | 2020-06-28 | Flexible display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010597789.9A CN111667764A (en) | 2020-06-28 | 2020-06-28 | Flexible display panel and display device |
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| CN202010597789.9A Pending CN111667764A (en) | 2020-06-28 | 2020-06-28 | Flexible display panel and display device |
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