Display panel and display device

Abstract

This application provides a display panel and a display device. The display panel includes a display area and a non-display area, and further includes: a plurality of data signal lines located in the display area; m fan-out areas located in the non-display area, the m fan-out areas being arranged sequentially along a first direction, each fan-out area containing n fan-out traces, the n fan-out traces being arranged sequentially along the first direction, the first end of each fan-out trace being electrically connected to a data signal line; a plurality of bonding areas located in the non-display area, the second end of each fan-out trace being electrically connected to a bonding terminal of a bonding area; each fan-out area includes two sub-fan-out areas, along the first direction, the sub-fan-out areas from the 1st fan-out area to the mth fan-out area are sequentially named the 1st sub-fan-out area, the 2nd sub-fan-out area, ..., the 2m-1th sub-fan-out area and the 2mth sub-fan-out area, the total resistance of the fan-out traces in the 2nd sub-fan-out area and the 2m-1th sub-fan-out area is less than the total resistance of the fan-out traces in other sub-fan-out areas located in the same fan-out area.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology

[0002] In a display panel, there are display areas and non-display areas. The display area contains signal lines such as data signal lines and scan signal lines to control the screen display. The non-display area contains drive circuitry and fan-out leads, which are used to transmit signals to the data signal lines. Multiple fan-out leads are usually arranged together to form a fan-out area located in the non-display area.

[0003] In medium and large-sized display panels, multiple drive circuits are required to connect fan-out traces. Each drive circuit corresponds to a set of fan-out traces. The display areas corresponding to adjacent areas between drive circuits will have uneven display defects. Summary of the Invention

[0004] The main objective of this application is to provide a display panel and a display device to at least solve the problem of uneven display in existing display panels with multiple driving circuits.

[0005] To achieve the above objectives, according to one aspect of this application, a display panel is provided, including a display area and a non-display area, the display panel further comprising:

[0006] Multiple data signal lines are located in the display area;

[0007] There are m fan-out areas located in the non-display area. The m fan-out areas are arranged sequentially along the first direction. The m fan-out areas contain n fan-out traces. The n fan-out traces are arranged sequentially along the first direction. The first end of each fan-out trace is electrically connected to the data signal line. Where m ≥ 2 and n > m.

[0008] Multiple bonding areas are located in the non-display area, and the second end of the fan-out trace is electrically connected to the bonding terminal of the bonding area;

[0009] Each fan-out region includes two sub-fan-out regions. Along the first direction, the sub-fan-out regions of the first fan-out region to the m-th fan-out region are, in sequence, the first sub-fan-out region, the second sub-fan-out region, ..., the 2m-1 sub-fan-out region and the 2m sub-fan-out region. The total resistance of the fan-out traces in the second sub-fan-out region and the 2m-1 sub-fan-out region is less than the total resistance of the fan-out traces in other sub-fan-out regions located in the same fan-out region.

[0010] According to another aspect of this application, a display device is also provided, comprising any of the aforementioned display panels.

[0011] By applying the technical solution of this application, for a display panel with multiple driving circuits, the total resistance of the fan-out traces in the fan-out sub-regions is differentiated from the total resistance of the fan-out traces in the sub-fan-out areas located at the edge of the non-display area to the total resistance of the sub-fan-out areas located in the middle of the non-display area through an asymmetrical resistance design. This reduces the total resistance of the second and second-m-1th sub-fan-out areas, thus making the overall resistance change of the display panel fan-out area smaller. This reduces the voltage drop difference of the data lines, alleviating or even solving the problem of uneven display in the middle of the display area caused by the uniform line width but different lengths of the fan-out traces, and ensuring a better display effect of the display panel. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0013] Figure 1 A schematic diagram illustrating the vertical split-screen phenomenon of a display panel with multiple driving circuits in the prior art is shown.

[0014] Figure 2 It shows Figure 1 The impedance trend diagram of the fan-out traces of the display panel is shown.

[0015] Figure 3 A schematic diagram of the structure of a display panel provided in an embodiment of this application is shown;

[0016] Figure 4 A schematic diagram of another display panel structure provided according to an embodiment of this application is shown;

[0017] Figure 5 A schematic diagram of the structure of another display panel provided according to an embodiment of this application is shown;

[0018] Figure 6 A schematic diagram of the structure of yet another display panel provided according to an embodiment of this application is shown;

[0019] Figure 7 An impedance trend diagram of the fan-out trace of a display panel according to an embodiment of this application is shown;

[0020] Figure 8 A schematic diagram of the structure of a display panel with m=2 provided according to an embodiment of this application is shown;

[0021] Figure 9 A schematic diagram of the structure of a display panel with m=3 according to an embodiment of this application is shown;

[0022] Figure 10 A schematic diagram of a display device provided according to an embodiment of this application is shown.

[0023] The above figures include the following reference numerals:

[0024] 10. Display panel; 11. Display area; 12. Non-display area; 13. Data signal line; 14. Fan-out area; 15. Fan-out trace; 16. Bonding area; 17. Sub-fan-out area; 1701. First sub-fan-out area; 1702. 2mth sub-fan-out area; 1703. Second sub-fan-out area; 1704. 2m-1th sub-fan-out area; 1705. Third sub-fan-out area; 1706. Fourth sub-fan-out area; 18. Drive circuit; 19. First sub-fan-out line; 20. Second sub-fan-out line. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] As described in the background section, existing display panels with multiple driving circuits suffer from uneven display. To address this technical problem, embodiments of this application provide a display panel and a display device.

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] The inventors discovered that, for example, Figure 1 The display panel 10 shown has multiple driving circuits 18. The line widths of the fan-out traces corresponding to the multiple driving circuits 18 are all the same. However, due to the different distances between the bonding terminals and data signal lines at different positions of the driving circuits 18, the lengths of the multiple fan-out traces vary considerably. Taking a display panel with two driving circuits as an example, specifically: the fan-out traces 15 electrically connected to the same driving circuit 18 are longer near the edge of the driving circuit 18 (i.e., the fan-out trace 15 in frame 1 is longer) and have relatively higher resistance. The fan-out traces 15 near the middle of the driving circuit 18 are shorter (i.e., the fan-out trace 15 in frame 2 is shorter) and have relatively lower resistance. Therefore, a data line with the same high impedance as the edge of the display area will appear in the middle of the display area. The impedance distribution diagram of the aforementioned fan-out traces along the first direction is shown below. Figure 2 As shown, this multi-segment gradient design may lead to vertical split-screen (corresponding to...) Figure 2 The phenomenon at position 2).

[0031] To address the above problems, this embodiment provides a method such as Figure 5 The display panel 10 shown includes a display area 11 and a non-display area 12. Specifically, the non-display area 12 is located at least on one side of the display area 11. The display panel also includes:

[0032] Multiple data signal lines 13 are located in the aforementioned display area 11. These multiple data signal lines are arranged sequentially along a first direction, which is parallel to the light-emitting surface of the display panel.

[0033] The non-display area 12 contains m fan-out zones 14, which are arranged sequentially along the first direction. Each fan-out zone 14 includes n fan-out traces 15, which are also arranged sequentially along the first direction. The first end of each fan-out trace 15 is electrically connected to the data signal line 13, where m ≥ 2 and n > m. In specific applications, each fan-out zone includes multiple fan-out traces. Each fan-out zone corresponds one-to-one with a driving circuit, meaning the number of driving circuits is ≥ 2. The number of driving circuits and fan-out zones can be determined according to actual design requirements. For example, two driving circuits can be used for mobile phones, while more than two driving circuits can be used for tablets and automotive displays.

[0034] The multiple bonding areas 16 located in the non-display area 12 have their second ends electrically connected to bonding terminals (not shown in the figure) of the bonding areas 16. These bonding areas can correspond one-to-one with the driving circuits, multiple bonding areas can correspond to one driving circuit, or one bonding area can correspond to multiple driving circuits. The driving circuit described in this application can be a driving chip or a flip-chip film.

[0035] Each of the aforementioned fan-out regions 14 includes two sub-fan-out regions 17. Along the first direction, the sub-fan-out regions 17 of the first to the mth fan-out regions 14 are, in sequence, the first sub-fan-out region, the second sub-fan-out region, ..., the 2m-1th sub-fan-out region and the 2mth sub-fan-out region. The total resistance of the fan-out traces 15 in the second and 2m-1th sub-fan-out regions is less than the total resistance of the fan-out traces 15 in other sub-fan-out regions 17 located in the same fan-out region. Specifically, the total resistance is the sum of the resistances of all the fan-out traces in the sub-fan-out region. Different resistances can be obtained by adjusting the length and / or width of the fan-out traces.

[0036] The technical solution of this application, for a display panel with multiple driving circuits, uses an asymmetrical resistance design for the fan-out traces in the fan-out sub-regions. This design differentiates the total resistance of the fan-out traces in the sub-fan-out areas located at the edge of the non-display area from the total resistance of the sub-fan-out areas located in the middle of the non-display area. This results in a relatively small total resistance for the second and second-m-1 sub-fan-out areas, thus minimizing the overall resistance variation of the display panel's fan-out areas. Consequently, it reduces the voltage drop difference of the data lines, alleviating or even resolving the problem of uneven display in the middle of the display area caused by the uniform line width but different lengths of the fan-out traces, ensuring a better display effect for the display panel.

[0037] The above is the core idea of ​​this application. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] In practical applications, the first end of the fan-out routing line is electrically connected to the data signal line in a one-to-one correspondence, and the second end of the fan-out routing line is electrically connected to the bonding terminal in a one-to-one correspondence.

[0039] In one alternative, Figure 8 An exemplary schematic diagram of a display panel with m=2 is shown, indicating that the display panel has two fan-out zones, including four sub-fan-out zones, as shown below. Figure 8As shown, the total resistance of the fan-out traces 15 in the second sub-fan-out area 1703 and the second (m-1)th sub-fan-out area 1704 (i.e., the third sub-fan-out area) is less than the total resistance of the fan-out traces in other sub-fan-out areas located in the same sub-fan-out area. Specifically, the second sub-fan-out area 1703 is adjacent to the first sub-fan-out area 1701, and the total resistance of the fan-out traces 15 in the second sub-fan-out area 1703 is less than the total resistance of the fan-out traces 15 in the first sub-fan-out area 1701. The second (m-1)th sub-fan-out area 1704 and the second (m-1)th sub-fan-out area 1702 (i.e., the fourth sub-fan-out area) are also less than the total resistance of the fan-out traces 15 in the first sub-fan-out area 1701. The fan-out traces 15 of the 2m-1th sub-fan-out area 1704 are located in adjacent positions. The total resistance of the fan-out traces 15 in the 2m-1th sub-fan-out area 1702 is less than that in the 2m-1st sub-fan-out area 1703. As a result, the total resistance of the 2nd sub-fan-out area 1703 and the 2m-1th sub-fan-out area 1704 is smaller. This can solve the problem of vertical screen splitting caused by the large voltage drop on the fan-out traces due to the large total resistance caused by the long length of the 2nd sub-fan-out area 1703 and the 2m-1th sub-fan-out area 1704. In order to reduce the total resistance, in the embodiments of this application, the resistance is reduced by increasing the width of the fan-out traces. In the display panel of this application, at least some of the fan-out traces in the second sub-fan-out area 1703 and the 2m-1 sub-fan-out area 1704 have a line width greater than at least some of the fan-out traces in other sub-fan-out areas located in the same fan-out area. Specifically, the width of the fan-out trace 15 in the second sub-fan-out area 1703 is greater than the width of at least some of the fan-out traces in the adjacent first sub-fan-out area 1701, and the width of the fan-out trace 15 in the 2m-1 sub-fan-out area 1704 is greater than the width of at least some of the fan-out traces in the adjacent 2m sub-fan-out area 1702. This reduces the resistance value of the fan-out traces in the second sub-fan-out area 1703 and the 2m-1 sub-fan-out area 1704, thereby reducing the voltage drop on the fan-out traces and improving the problem of vertical screen splitting.

[0040] Where the size of the non-display area allows, the linewidth of all fan-out traces in the second sub-fan-out area can be set to be smaller than the linewidth of fan-out traces in other sub-fan-out areas, and / or the linewidth of all fan-out traces in the 2m-1 sub-fan-out area can be set to be smaller than the linewidth of fan-out traces in other sub-fan-out areas. In this application, to balance the display effect of the display area and the miniaturization requirements of the display panel, the linewidth of some fan-out traces in the second sub-fan-out area is set to be smaller than the linewidth of fan-out traces in other sub-fan-out areas, and / or the linewidth of some fan-out traces in the 2m-1 sub-fan-out area is set to be smaller than the linewidth of fan-out traces in other sub-fan-out areas. In other words, by increasing the width of at least some of the fan-out traces in the second and 2m-1 sub-fan-out areas, the resistance of the fan-out traces in these two sub-fan-out areas is reduced, thereby improving the vertical split-screen problem.

[0041] Specifically, in the first sub-fan-out area, the fan-out trace with a linewidth smaller than other fan-out traces can be located in the middle of the first sub-fan-out area, at the edge of the first sub-fan-out area, or at other locations within the first sub-fan-out area. Similarly, in the second m sub-fan-out area, the fan-out trace with a linewidth smaller than other fan-out traces can be located in the middle of the second m sub-fan-out area, at the edge of the second m sub-fan-out area, or at other locations within the second m sub-fan-out area. To further ensure a better display effect and alleviate the problem of uneven display on the display panel, in this application, along the first direction, the resistance of the first fan-out trace in the first sub-fan-out area and / or the nth fan-out trace in the second m sub-fan-out area is greater than the resistance of the other fan-out traces. This avoids excessive fluctuations in the resistance of the fan-out area, which could affect the display effect.

[0042] According to another exemplary solution of this application, the line width of each of the fan-out traces in the first sub-fan-out area and / or the second sub-fan-out area is the same. That is, the line width design of each of the fan-out traces in the first sub-fan-out area and / or the second sub-fan-out area in the display panel remains unchanged, which reduces the difficulty of the process.

[0043] To reduce the design complexity of the aforementioned fan-out area, in another exemplary embodiment, such as Figure 5As shown, the aforementioned fan-out trace 15 includes a first sub-fan-out trace 19 extending along a second direction and a second sub-fan-out trace 20 connected to the first sub-fan-out trace 19 and extending along a third direction. The second sub-fan-out trace 20 is electrically connected to the data signal line 13 through the first sub-fan-out trace 19. The second direction intersects with the first direction, and the third direction is parallel to or intersects with the first direction. In the second sub-fan-out area and the 2m-1 sub-fan-out area, the line width of the first sub-fan-out trace and the second sub-fan-out trace of the same fan-out trace are the same, that is, the line width of each position of the fan-out trace is consistent. On the basis of maintaining consistent line width, the resistance of the fan-out traces in the second sub-fan-out area and the 2m-1 sub-fan-out area is further reduced by increasing the line width, thereby reducing the impact of display splitting.

[0044] Assuming the line width is consistent at all locations of the fan-out routing, such as Figure 5As shown, the fan-out traces in the second sub-fan-out area and / or the 2m-1 sub-fan-out area satisfy at least one of the following: along the direction from the first sub-fan-out area to the second sub-fan-out area, the line width of the fan-out trace 15 in the second sub-fan-out area gradually increases; that is, along the direction from the first sub-fan-out area to the second sub-fan-out area, the line width of the first sub-fan-out trace 19 in the second sub-fan-out area gradually increases, the line width of the second sub-fan-out trace 20 gradually increases, and the line width of the first sub-fan-out trace 19 and the second sub-fan-out trace 20 corresponding to the same fan-out trace 15 is the same; along the direction from the first sub-fan-out area to the second sub-fan-out area, the line width of the first sub-fan-out trace 19 ...19 gradually increases, the line width of the second sub-fan-out trace 19 gradually increases, the line width of the second sub-fan-out trace 19 gradually increases, the line width of the second sub-fan-out trace 19 The m sub-fan-out areas point towards the aforementioned 2m-1 sub-fan-out area. The linewidth of the fan-out traces in the 2m-1 sub-fan-out area gradually increases (not shown in the figure). That is, along the direction from the 2m sub-fan-out area to the 2m-1 sub-fan-out area, the linewidth of the first sub-fan-out trace in the 2m-1 sub-fan-out area gradually increases, and the linewidth of the second sub-fan-out trace also gradually increases. Furthermore, the linewidths of the first and second sub-fan-out traces corresponding to the same fan-out trace are the same. Of course, the sub-fan-out traces in the 2nd and 2m-1st sub-fan-out areas can also simultaneously satisfy both of the above conditions. In this embodiment, along the direction from the 1st sub-fan-out area to the 2nd sub-fan-out area, the linewidth of the fan-out traces in the 2nd sub-fan-out area gradually increases, thus gradually decreasing the resistance. This can prevent the fan-out traces at the boundary between the 2nd and 1st sub-fan-out areas from exhibiting excessive resistance, which could lead to uneven display. Furthermore, if the resistance difference of the fan-out traces at adjacent positions of the first and second sub-fan-out areas is too large, it can easily cause a sudden change in the voltage drop of the data lines at adjacent positions, leading to uneven display. This application makes the line width of the first sub-fan-out trace in the second sub-fan-out area gradually change away from the first sub-fan-out area, preventing a sudden change in the resistance of the fan-out trace and further avoiding uneven display. Similarly, along the path from the aforementioned 2m sub-fan-out area to the aforementioned 2m-1 sub-fan-out area, the line width of the fan-out traces in the aforementioned 2m-1 sub-fan-out area gradually increases, resulting in a gradual decrease in resistance. This can prevent the uneven display caused by a sudden change in resistance due to excessive resistance in the fan-out traces at the boundary between the 2m-1 and 2m sub-fan-out areas. Furthermore, if the resistance difference between the fan-out traces at adjacent positions of the 2m sub-fan-out area and the 2m-1 sub-fan-out area is too large, it can easily cause a sudden change in the voltage drop of the data lines at adjacent positions, resulting in uneven display. In this application, the line width of the first sub-fan-out trace in the 2m-1 sub-fan-out area is made to gradually change along the direction away from the 2m sub-fan-out area, so that the resistance of the fan-out trace will not change suddenly, further avoiding the occurrence of uneven display.

[0045] In yet another exemplary embodiment, such as Figure 6As shown, the aforementioned fan-out trace 15 includes a first sub-fan-out trace 19 extending along a second direction and a second sub-fan-out trace 20 connected to the first sub-fan-out trace 19 and extending along a third direction. The second sub-fan-out trace 20 is electrically connected to the data signal line 13 through the first sub-fan-out trace 19. The second direction intersects the first direction, and the third direction is parallel to or intersects the first direction. In at least some of the fan-out traces in the second sub-fan-out area and / or the 2m-1 sub-fan-out area, the line widths of the first and second sub-fan-out traces are different. That is, for at least some fan-out traces, the line widths of the first sub-fan-out trace 19 and the second sub-fan-out trace 20 of the same fan-out trace 15 are different. This arrangement improves design flexibility, allowing for the selection of appropriate widths of the first and second sub-fan-out traces based on line width and space requirements. At this time, the second sub-fan-out line in the second sub-fan-out region and the second sub-fan-out line in the 2m-1 sub-fan-out region satisfies one of the following conditions: along the direction from the first sub-fan-out region to the second sub-fan-out region, the line width of the second sub-fan-out line 20 in the second sub-fan-out region gradually increases, and the resistance of the second sub-fan-out line 20 in the second sub-fan-out region gradually decreases; along the direction from the 2m sub-fan-out region to the 2m-1 sub-fan-out region, the line width of the second sub-fan-out line in the 2m-1 sub-fan-out region gradually increases (not shown in the figure), and the resistance of the second sub-fan-out line in the 2m-1 sub-fan-out region gradually decreases; of course, the second sub-fan-out line 20 in the second sub-fan-out region and the 2m-1 sub-fan-out region can also satisfy both of the above conditions at the same time. In this embodiment, along the direction from the first sub-fan-out area to the second sub-fan-out area, the line width of the second sub-fan-out line in the second sub-fan-out area gradually increases and the resistance gradually decreases. This prevents the fan-out traces at the boundary between the second and first sub-fan-out areas from exhibiting uneven display due to excessive resistance. Furthermore, if the resistance difference between adjacent fan-out traces in the first and second sub-fan-out areas is too large, it can easily cause a sudden change in the voltage drop of the data lines at adjacent locations, leading to uneven display. This application makes the line width of the second sub-fan-out line in the second sub-fan-out area gradually change along the direction away from the first sub-fan-out area, preventing a sudden change in the resistance of the fan-out traces and further avoiding uneven display. Similarly, along the path from the 2mth sub-fan-out area to the 2m-1th sub-fan-out area, the line width of the second sub-fan-out line in the 2m-1th sub-fan-out area gradually increases and the resistance gradually decreases. This can prevent the fan-out trace at the boundary between the 2m-1th and 2mth sub-fan-out areas from experiencing a sudden change in resistance due to excessive resistance, which could cause uneven display.Furthermore, if the resistance difference between the fan-out traces at adjacent positions of the 2m sub-fan-out area and the 2m-1 sub-fan-out area is too large, it can easily cause a sudden change in the voltage drop of the data lines at adjacent positions, resulting in uneven display. In this application, the line width of the second sub-fan-out trace in the 2m-1 sub-fan-out area is made to gradually change along the direction away from the 2m sub-fan-out area, so that the resistance of the fan-out trace will not change suddenly, further avoiding the occurrence of uneven display.

[0046] In the above embodiments, along the direction from the first sub-fan-out area to the second sub-fan-out area, the linewidth of each of the first sub-fan-out lines in the second sub-fan-out area can remain unchanged or undergo other changes, such as gradually increasing or decreasing, or changing irregularly, as long as it ensures that the impedance of the fan-out traces in the second sub-fan-out area gradually decreases along the direction from the first sub-fan-out area to the second sub-fan-out area. Similarly, along the direction from the 2m sub-fan-out area to the 2m-1 sub-fan-out area, the linewidth of each of the first sub-fan-out lines in the 2m-1 sub-fan-out area can remain unchanged or undergo other changes, such as gradually increasing or decreasing, or changing irregularly, as long as it ensures that the impedance of the fan-out traces in the 2m-1 sub-fan-out area gradually decreases along the direction from the 2m sub-fan-out area to the 2m-1 sub-fan-out area.

[0047] Of course, in addition to the above-mentioned method of gradually increasing the width of the fan-out traces to achieve a gradual decrease in the total resistance of the second sub-fan-out area along the direction from the first sub-fan-out area to the second sub-fan-out area, the second sub-fan-out area can also be divided into multiple sub-regions along the direction from the first sub-fan-out area to the second sub-fan-out area, with the total resistance of the fan-out traces in each sub-region decreasing sequentially. As for the resistance of each fan-out trace in a sub-region, those skilled in the art can flexibly set it. Similarly, in addition to the aforementioned method of gradually increasing the width of the fan-out traces to achieve a gradually decreasing total resistance in the 2m-1 sub-fan-out area along the direction from the 2m sub-fan-out area to the 2m-1 sub-fan-out area, the 2m-1 sub-fan-out area can also be divided into multiple sub-regions along the direction from the 2m sub-fan-out area to the 2m-1 sub-fan-out area, with the total resistance of the fan-out traces in each sub-region decreasing sequentially. As for the resistance of each fan-out trace in a sub-region, those skilled in the art can flexibly set it.

[0048] To further avoid excessive impedance differences between adjacent fan-out traces, which could cause vertical screen splitting at the intersection of adjacent fan-out traces, in the exemplary solution of this application, the resistance difference between two adjacent fan-out traces in the second sub-fan-out area and / or the second m-1 sub-fan-out area is less than 50 ohms.

[0049] Specifically, in the second sub-fan-out area, the maximum linewidth of the first sub-fan-out line and the second sub-fan-out line is the same, that is, in the second sub-fan-out area, the linewidth of the first sub-fan-out line with the largest linewidth is the same as the linewidth of the second sub-fan-out line with the largest linewidth; and / or, in the 2m-1 sub-fan-out area, the maximum linewidth of the first sub-fan-out line and the second sub-fan-out line is the same, that is, in the 2m-1 sub-fan-out area, the linewidth of the first sub-fan-out line with the largest linewidth is the same as the linewidth of the second sub-fan-out line with the largest linewidth.

[0050] To further ensure better display performance of the display panel and to further address the issue of uneven display when the display panel includes multiple driving circuits, in one optional solution, the line widths of the multiple second sub-fan-out lines at the boundary between the first sub-fan-out area and the second sub-fan-out area are the same, that is, at least one second sub-fan-out line in the first sub-fan-out area at the boundary has the same line width as at least one second sub-fan-out line in the second sub-fan-out area; and / or, the line widths of the multiple second sub-fan-out lines at the boundary between the 2m-1 sub-fan-out area and the 2m sub-fan-out area are the same, that is, at least one second sub-fan-out line in the 2m-1 sub-fan-out area at the boundary has the same line width as at least one second sub-fan-out line in the 2m sub-fan-out area. By setting the line width of multiple second sub-fan-out lines at the boundary between the first and second sub-fan-out areas to be the same, the resistance change at the boundary between the first and second sub-fan-out areas can be minimized, thereby avoiding the vertical splitting of the display area at the boundary due to a sudden change in resistance at the boundary.

[0051] Specifically, compared to the second sub-fan-out line in the first sub-fan-out area, in the second sub-fan-out area, the linewidth of the second sub-fan-out line gradually increases, while the minimum spacing between adjacent first sub-fan-out lines and adjacent second sub-fan-out lines remains unchanged. Thus, when the number of fan-out lines is the same in both the first and second sub-fan-out areas, such as... Figure 6 As shown, the area S2 occupied by all the first sub-fan-out lines in the second sub-fan-out area is greater than the area S1 occupied by all the first sub-fan-out lines in the first sub-fan-out area; and / or, since the linewidth of the second sub-fan-out lines gradually increases in the 2m-1 sub-fan-out area, while the minimum spacing between adjacent first sub-fan-out lines and adjacent second sub-fan-out lines remains unchanged, thus, when the number of fan-out lines is the same in the 2m-1 sub-fan-out area and the 2m sub-fan-out area, such as Figure 6 As shown, the area occupied by all S2m-1 of the first sub-fan-out lines in the 2m-1th sub-fan-out area is greater than the area S2m occupied by all the first sub-fan-out lines in the 2mth sub-fan-out area.

[0052] Of course, in all the aforementioned sub-fan-out areas other than the second sub-fan-out area and / or the 2m-1 sub-fan-out area, the resistance difference between any two adjacent fan-out traces is also less than 50 ohms. This further ensures good display uniformity across the display panel.

[0053] According to another exemplary scheme of this application, when m≥3, the sum of the resistances of the fan-out traces in any of the sub-fan-out areas from the second fan-out area to the (m-1)th fan-out area is the same as the sum of the resistances of the fan-out traces in the second sub-fan-out area and / or the (2m-1)th sub-fan-out area. Specifically, the fan-out traces in any of the sub-fan-out areas from the second fan-out area to the (m-1)th fan-out area can be designed according to the design of the fan-out traces in the second sub-fan-out area and / or the (2m-1)th sub-fan-out area, so that the fan-out traces in the sub-fan-out areas from the second fan-out area to the (m-1)th fan-out area are consistent with the fan-out traces at the corresponding positions in the second sub-fan-out area, and / or consistent with the fan-out traces at the corresponding positions in the (2m-1)th sub-fan-out area. This can further reduce the vertical split-screen phenomenon and reduce the design difficulty of the fan-out traces of the display panel. Specifically, Figure 9An exemplary example is shown in the case where m=3, meaning the display panel includes three fan-out areas: the first, second, and third fan-out areas arranged along a first direction. Specifically, along the first direction, these are divided into the first sub-fan-out area 1701, the second sub-fan-out area 1703, the third sub-fan-out area 1705, the fourth sub-fan-out area 1706, the fifth sub-fan-out area (i.e., the 2m-1th sub-fan-out area 1704), and the... There are 6 sub-fan-out areas (i.e., the 2mth sub-fan-out area 1702). The total resistance of the fan-out traces in the 3rd sub-fan-out area 1705 is the same as the total resistance of the fan-out traces in the 2nd sub-fan-out area 1703 and / or the 2m-1th sub-fan-out area 1704. The total resistance of the fan-out traces in the 4th sub-fan-out area 1706 is the same as the total resistance of the fan-out traces in the 2nd sub-fan-out area 1703 and / or the 2m-1th sub-fan-out area 1704.

[0054] Specifically, the line width of the fan-out traces in the second to the (m-1)th fan-out areas is the same. This further ensures that the total resistance of the fan-out traces at the edges of the non-display area is greater than that of the fan-out traces in the middle, thereby further ensuring display uniformity, while also further reducing the design difficulty of the fan-out traces in the middle area.

[0055] To further reduce the difference in total resistance between the fan-out traces in the edge and middle fan-out areas, thereby further improving the display uniformity of the display panel, in another alternative embodiment, along the direction from the second fan-out area to the first fan-out area, the linewidth of the fan-out traces in the first fan-out area gradually increases (not shown in the figure), and / or, as... Figure 3 and Figure 4 As shown, along the direction from the 2m-1th sub-fan-out area to the 2mth sub-fan-out area, the line width of the fan-out trace 15 in the 2mth sub-fan-out area gradually increases. Because the trace lengths in the sub-fan-out areas at the edge of the display panel, such as the 1st and 2mth sub-fan-out areas, are relatively long, the closer to the edge, the longer the fan-out trace. Figures 3 to 4 As shown, the fan-out trace width gradually increases, which can reduce the resistance value of the fan-out trace. This reduces the difference in resistance value between the fan-out trace in the edge area of ​​the display panel and the fan-out trace in other areas, making the resistance value of the fan-out trace in each position less different, reducing the voltage drop difference of the data lines, and improving the uniformity of the display.

[0056] In another exemplary embodiment, such as Figure 3As shown, the aforementioned fan-out routing line 15 includes a first sub-fan-out line 19 extending along a second direction and a second sub-fan-out line 20 connected to the first sub-fan-out line 19 and extending along a third direction. The second sub-fan-out line 20 is electrically connected to the data signal line 13 through the first sub-fan-out line 19. The second direction intersects with the first direction, and the third direction is parallel to or intersects with the first direction. In the first sub-fan-out area and / or the second sub-fan-out area, the line width of the first sub-fan-out line 19 and the second sub-fan-out line 20 of the same fan-out routing line 15 is the same, that is, the line width of each position of the fan-out routing line 15 is consistent.

[0057] Assuming the line width is consistent at all locations of the fan-out routing, such as Figure 3 As shown, the fan-out traces in the first sub-fan-out area and / or the second sub-fan-out area satisfy at least one of the following: along the direction from the second sub-fan-out area to the first sub-fan-out area, the line width of the fan-out traces in the first sub-fan-out area gradually increases (not shown in the figure). That is, along the direction from the second sub-fan-out area to the first sub-fan-out area, in the first sub-fan-out area, the line width of the first sub-fan-out trace gradually increases, the line width of the second sub-fan-out trace gradually increases, and the line width of the first and second sub-fan-out traces corresponding to the same fan-out trace are the same; for example... Figure 3 As shown, along the direction from the (2m-1)th sub-fan-out area to the 2mth sub-fan-out area, the linewidth of the fan-out trace 15 in the 2mth sub-fan-out area gradually increases. That is, along the direction from the (2m-1)th sub-fan-out area to the 2mth sub-fan-out area, the linewidth of the first sub-fan-out trace 19 and the linewidth of the second sub-fan-out trace 20 in the 2mth sub-fan-out area gradually increase, and the linewidths of the first sub-fan-out trace 19 and the second sub-fan-out trace 20 corresponding to the same fan-out trace 15 are the same. In this embodiment, along the direction from the second sub-fan-out area to the first sub-fan-out area, the linewidth of the fan-out trace in the first sub-fan-out area gradually increases, thus gradually decreasing the resistance. This can prevent the vertical screen splitting phenomenon caused by excessive resistance in the fan-out traces at either the left or right edge. Similarly, as the fan-out traces from the 2m-1th sub-fan-out area to the 2mth sub-fan-out area gradually increase in width, the resistance gradually decreases. This can prevent the vertical screen splitting phenomenon caused by the sudden change in resistance of the fan-out traces at another position on the left and right edges due to excessive resistance.

[0058] In yet another exemplary embodiment, such as Figure 4As shown, the aforementioned fan-out routing 15 includes a first sub-fan-out routing 19 arranged along a second direction and a second sub-fan-out routing 20 connected to the first sub-fan-out routing 19 and extending along a third direction. The second sub-fan-out routing 20 is electrically connected to the data signal line 13 through the first sub-fan-out routing 19. The second direction intersects the first direction, and the third direction is parallel to or intersects the first direction. In the first sub-fan-out area and / or the second sub-fan-out area, the line widths of the first sub-fan-out routing 19 and the second sub-fan-out routing 20 are different. And satisfying at least one of the following: along the direction from the second sub-fan-out area to the first sub-fan-out area, the linewidth of the second sub-fan-out line in the first sub-fan-out area gradually increases (not shown in the figure), then the resistance of the second sub-fan-out line in the first sub-fan-out area gradually decreases; along the direction from the (2m-1)th sub-fan-out area to the 2mth sub-fan-out area, the linewidth of the second sub-fan-out line 20 in the 2mth sub-fan-out area gradually increases, then the resistance of the second sub-fan-out line in the 2mth sub-fan-out area gradually decreases. In this embodiment, along the direction from the second sub-fan-out area to the first sub-fan-out area, the linewidth of the fan-out trace in the first sub-fan-out area gradually increases and the resistance gradually decreases, which can prevent the vertical screen splitting phenomenon from occurring due to excessive resistance of the fan-out trace at one of the left and right edges. Similarly, from the 2m-1th sub-fan-out area to the 2mth sub-fan-out area, the line width of the fan-out trace in the 2mth sub-fan-out area gradually increases and the resistance gradually decreases. This can prevent the display unevenness caused by the sudden change in resistance of the fan-out trace at another position on the left and right edges due to excessive resistance.

[0059] In the above embodiments, along the direction from the second sub-fan-out area to the first sub-fan-out area, the linewidth of each of the first sub-fan-out lines in the first sub-fan-out area can remain unchanged or undergo other changes, such as gradually increasing or decreasing, or changing irregularly, as long as it ensures that the impedance of the fan-out traces in the first sub-fan-out area gradually decreases along the direction from the second sub-fan-out area to the first sub-fan-out area. Similarly, along the direction from the (2m-1)th sub-fan-out area to the (2m)th sub-fan-out area, the linewidth of each of the first sub-fan-out lines in the (2m)th sub-fan-out area can remain unchanged or undergo other changes, such as gradually increasing or decreasing, or changing irregularly, as long as it ensures that the impedance of the fan-out traces in the (2m-1)th sub-fan-out area to the (2m)th sub-fan-out area gradually decreases.

[0060] Of course, in addition to the above-mentioned method of gradually increasing the width of the fan-out traces to achieve a gradual decrease in the total resistance of the first sub-fan-out area along the direction from the second sub-fan-out area to the first sub-fan-out area, the first sub-fan-out area can also be divided into multiple sub-regions along the direction from the second sub-fan-out area to the first sub-fan-out area, with the total resistance of the fan-out traces in each sub-region decreasing sequentially. As for the resistance of each fan-out trace in a sub-region, those skilled in the art can flexibly set it. Similarly, in addition to the aforementioned method of gradually increasing the width of the fan-out traces to achieve a gradually decreasing total resistance in the 2m sub-fan-out area along the direction from the 2m-1 sub-fan-out area to the 2m sub-fan-out area, the 2m sub-fan-out area can also be divided into multiple sub-regions along the direction from the 2m-1 sub-fan-out area to the 2m sub-fan-out area, with the total resistance of the fan-out traces in each sub-region decreasing sequentially. As for the resistance of each fan-out trace in a sub-region, those skilled in the art can flexibly set it.

[0061] Specifically, in the first sub-fan-out area, the maximum linewidth of the first sub-fan-out line and the second sub-fan-out line is the same, that is, in the first sub-fan-out area, the linewidth of the first sub-fan-out line with the largest linewidth is the same as the linewidth of the second sub-fan-out line with the largest linewidth; and / or, in the second m sub-fan-out area, the maximum linewidth of the first sub-fan-out line and the second sub-fan-out line is the same, that is, in the second m sub-fan-out area, the linewidth of the first sub-fan-out line with the largest linewidth is the same as the linewidth of the second sub-fan-out line with the largest linewidth.

[0062] It should be noted that the linewidth mentioned above in this application can refer to the width of each position of the fan-out routing line, or it can refer to the width of any position of the fan-out routing line. The linewidth of the fan-out routing line gradually increases, which can mean that the linewidth of the fan-out routing line gradually increases at one position, that is, the linewidth of the same fan-out routing line is inconsistent at different positions. Among them, the above-mentioned positions of different fan-out routing lines can be the same, such as the linewidth of the middle of the first fan-out routing line gradually increasing with the linewidth of the middle of the second fan-out routing line. The above-mentioned positions of different fan-out routing lines can also be different, such as the linewidth of the middle of the first fan-out routing line gradually increasing with the linewidth of the end of the second fan-out routing line. Alternatively, the linewidth of the fan-out routing line can gradually increase at every position, that is, the linewidth of the same fan-out routing line is consistent at all positions.

[0063] Taking the display panel as an example, which includes two driving circuits, the trend graph of the resistance changing along the first direction obtained by using the display panel of this application is as follows: Figure 7 As shown, comparison Figure 2 and Figure 7As can be seen, the impedance peaks at the edges (i.e., positions 1 and 3) and the middle (i.e., position 2) of the display panel are reduced, thus avoiding abrupt changes in impedance at the edges or in the middle.

[0064] This application also provides a method such as Figure 10 The display device shown includes any of the aforementioned display panels.

[0065] In the aforementioned display device, the display panel includes multiple driving circuits. By using an asymmetrical resistance design for the fan-out traces in the fan-out sub-regions, the total resistance of the fan-out traces in the sub-fan-out areas located at the edges of the non-display area is increased. That is, the total resistance of the fan-out traces in the first sub-fan-out area and / or the 2mth sub-fan-out area is increased, so that the total resistance of the sub-fan-out areas located in the middle of the non-display area, such as the second sub-fan-out area and / or the 2m-1th sub-fan-out area, can be relatively small. This makes the overall resistance variation of the fan-out area of ​​the display panel smaller, thereby reducing the voltage drop difference of the data lines. This alleviates or even solves the problem of uneven display in the middle of the display area caused by the uniform line width but different lengths of the fan-out traces, ensuring a better overall display effect of the display device.

[0066] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0067] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0068] By using an asymmetrical resistance design for the fan-out traces in the fan-out sub-regions, the total resistance of the fan-out traces located at the edge of the non-display area is differentiated from the total resistance of the fan-out traces located in the middle of the non-display area. This results in a relatively smaller total resistance for the second and second-m-1th fan-out sub-regions, thus minimizing the overall resistance variation of the display panel's fan-out areas. Consequently, the voltage drop difference of the data lines is reduced, alleviating or even resolving the issue of uneven display in the middle of the display area caused by the uniform line width but different lengths of the fan-out traces, ensuring a better display effect for the display panel.

[0069] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized in that, Including the display area and non-display area, and also including: Multiple data signal lines are located in the display area; There are m fan-out areas located in the non-display area. The m fan-out areas are arranged sequentially along the first direction. The m fan-out areas contain n fan-out traces. The n fan-out traces are arranged sequentially along the first direction. The first end of each fan-out trace is electrically connected to the data signal line. Where m ≥ 2 and n > m. Multiple bonding areas are located in the non-display area, and the second end of the fan-out trace is electrically connected to the bonding terminal of the bonding area; Each fan-out region includes two sub-fan-out regions. Along the first direction, the sub-fan-out regions from the first fan-out region to the m-th fan-out region are, in sequence, the first sub-fan-out region, the second sub-fan-out region, ..., the 2m-1 sub-fan-out region and the 2m sub-fan-out region. The total resistance of the fan-out traces in the second sub-fan-out region and the 2m-1 sub-fan-out region is less than the total resistance of the fan-out traces in other sub-fan-out regions located in the same fan-out region. When m≥3, the sum of the resistances of the fan-out traces in any of the sub-fan-out areas from the second fan-out area to the (m-1)th fan-out area is the same as the sum of the resistances of the fan-out traces in the second sub-fan-out area and / or the (2m-1)th sub-fan-out area.

2. The display panel according to claim 1, characterized in that, At least a portion of the fan-out traces in the second sub-fan-out area and the 2m-1 sub-fan-out area have a line width greater than at least a portion of the fan-out traces in other sub-fan-out areas located in the same fan-out area.

3. The display panel according to claim 2, characterized in that, The fan-out routing includes a first sub-fan-out routing extending along a second direction and a second sub-fan-out routing connected to the first sub-fan-out routing and extending along a third direction, wherein the second direction intersects the first direction, and the third direction is parallel to or intersects the first direction. The second sub-fan-out routing in the second sub-fan-out region and the 2m-1th sub-fan-out region satisfies one of the following conditions: Along the direction from the first sub-fan-out region to the second sub-fan-out region, the linewidth of the second sub-fan-out line in the second sub-fan-out region gradually increases; and / or Along the direction from the 2mth sub-fan-out area to the 2m-1th sub-fan-out area, the line width of the second sub-fan-out line in the 2m-1th sub-fan-out area gradually increases.

4. The display panel according to claim 3, characterized in that, The first sub-fan-out line and the second sub-fan-out line have the same line width.

5. The display panel according to claim 4, characterized in that, The fan-out routing includes a first sub-fan-out line extending along a second direction and a second sub-fan-out line connected to the first sub-fan-out line and extending along a third direction, wherein the second direction intersects the first direction, the third direction is parallel to or intersects the first direction, and in the second sub-fan-out area and / or the 2m-1 sub-fan-out area, at least some of the fan-out routing lines have different line widths for the first sub-fan-out line and the second sub-fan-out line.

6. The display panel according to claim 3, characterized in that, In the second sub-fanout area and the 2m-1 sub-fanout area, the resistance difference between two adjacent fanout traces is less than 50 ohms.

7. The display panel according to claim 3, characterized in that, The line widths of the multiple second sub-fan-out lines at the boundary between the first sub-fan-out area and the second sub-fan-out area are the same, and / or the line widths of the multiple second sub-fan-out lines at the boundary between the 2m-1th sub-fan-out area and the 2mth sub-fan-out area are the same.

8. The display panel according to claim 3, characterized in that, The area occupied by all the first sub-fan-out lines in the second sub-fan-out area is greater than the area occupied by all the first sub-fan-out lines in the first sub-fan-out area. The area occupied by all the first sub-fan-out lines in the 2m-1th sub-fan-out area is greater than the area occupied by all the first sub-fan-out lines in the 2mth sub-fan-out area.

9. The display panel according to claim 1, characterized in that, Along the first direction, the resistance of the first fan-out trace and / or the nth fan-out trace is greater than the resistance of the remaining fan-out traces.

10. The display panel according to claim 1, characterized in that, The line width of each fan-out trace in the first sub-fan-out area and / or the second m sub-fan-out area is the same.

11. The display panel according to claim 1, characterized in that, The line width of the fan-out traces in the second fan-out area to the (m-1)th fan-out area is the same.

12. The display panel according to claim 1, characterized in that, Along the direction from the second sub-fan-out area to the first sub-fan-out area, the line width of the fan-out trace in the first sub-fan-out area gradually increases. And / or, Along the direction from the (2m-1)th sub-fan-out area to the 2mth sub-fan-out area, the line width of the fan-out trace in the 2mth sub-fan-out area gradually increases.

13. The display panel according to claim 12, characterized in that, The fan-out routing includes a first sub-fan-out line arranged along a second direction and a second sub-fan-out line connected to the first sub-fan-out line and extending along a third direction, wherein the second direction intersects the first direction, the third direction is parallel to or intersects the first direction, and in the first sub-fan-out area and / or the 2m sub-fan-out area, the line widths of the first sub-fan-out line and the second sub-fan-out line are different, and at least one of the following is satisfied: Along the direction from the second sub-fan-out region to the first sub-fan-out region, the linewidth of the second sub-fan-out line in the first sub-fan-out region gradually increases; and / or Along the direction from the (2m-1)th sub-fan-out area to the 2mth sub-fan-out area, the line width of the second sub-fan-out line in the 2mth sub-fan-out area gradually increases.

14. A display device, characterized in that, The display panel includes any one of claims 1 to 13.

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