Display panel and display device

Abstract

A display panel and a display device. The display panel has a fan-out region; the fan-out region includes a first region and second regions located on opposite sides of the first region; the first region and one second region are arranged along a first direction; the display panel includes a plurality of fan-out lines; the plurality of fan-out lines include a plurality of first-type fan-out lines and a plurality of second-type fan-out lines; the plurality of first-type fan-out lines are located in the first region, and the plurality of second-type fan-out lines are located in the second regions; each first-type fan-out line among the plurality of first-type fan-out lines includes a first winding portion, the size of the area occupied by the first winding portion in a second direction is smaller than a line length of the first winding portion; the first direction and the second direction intersect; two adjacent first-type fan-out lines along the first direction are disposed on different layers; in a thickness direction of the display panel, orthogonal projections of the first winding portions of two adjacent first-type fan-out lines on a plane where the display panel is located at least partially overlap.

Description

Display panel and display device

[0001] This application claims priority to Chinese patent application No. 202411537512.1, filed on October 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0003] Organic light-emitting diode (OLED) display panels have gradually become one of the mainstream technologies in the display field due to their excellent performance, such as low power consumption, high color saturation, wide viewing angle, thinness, and flexibility.

[0004] Multiple signal lines are set in the display panel. These signal lines are introduced into the display area from the fan-out area to transmit the required drive signals to the display area. Inconsistent trace resistance of each signal line will cause uneven signal transmission to different locations in the display area of ​​the display panel, thus affecting the display uniformity of the display panel. Summary of the Invention

[0005] On one hand, a display panel is provided. The display substrate has a fan-out region; the fan-out region includes a first region and a second region located on opposite sides of the first region; the first region and the second region are arranged along a first direction; the display panel includes multiple fan-out lines; the multiple fan-out lines include multiple first-type fan-out lines and multiple second-type fan-out lines; the multiple first-type fan-out lines are located in the first region, and the multiple second-type fan-out lines are located in the second region; each of the multiple first-type fan-out lines includes a first winding portion, the size of the area occupied by the first winding portion in a second direction is smaller than the length of the first winding portion; the first direction intersects the second direction; along the first direction, adjacent two first-type fan-out lines are arranged in different layers; the orthographic projections of the first winding portions of the adjacent two first-type fan-out lines on the plane of the display panel at least partially overlap.

[0006] In some embodiments, n adjacent first-type fan-out lines constitute a repeating unit; each first-type fan-out line in the repeating unit is arranged in a different layer; the ratio of the size of the overlapping portion of the orthographic projection of two adjacent first winding portions on the plane of the display panel in the first direction to the size of the orthographic projection of the first winding portion on the plane of the display panel in the first direction is less than (n-1) / n; n is a positive integer greater than 1.

[0007] In some embodiments, the i-th first-type fan-out line arranged along the first direction in each of the repeating units is arranged on the same layer; i is a positive integer, i≤n.

[0008] In some embodiments, the display panel includes: a plurality of gate conductive layers stacked together; each of the first type of fan-out lines of the repeating unit is located in a different gate conductive layer.

[0009] In some embodiments, the first winding portion includes: at least two first sub-portions and at least one second sub-portion; adjacent first sub-portions and second sub-portions are connected end-to-end in sequence; the first sub-portions extend along the first direction, and the second sub-portions extend along the second direction; two adjacent first winding portions include a first sub-winding portion and a second sub-winding portion; one of the first sub-winding portions overlaps with the orthographic projection portion of one of the first sub-winding portions on the plane where the display panel is located.

[0010] In some embodiments, the line length of the first sub-part is greater than the line length of the second sub-part.

[0011] In some embodiments, at least a portion of the first sub-sections in the first winding portion have equal wire lengths.

[0012] In some embodiments, at least one of the plurality of second-type fan-out lines includes a second winding portion; the length of the second winding portion is less than the length of the first winding portion.

[0013] In some embodiments, the first region and the second region have a first boundary line; at least two of the plurality of second type fan-out lines include a second winding portion; in at least two of the second winding portions located in the second region, the length of each second winding portion is negatively correlated with its distance from the first boundary line.

[0014] In some embodiments, two adjacent second-type fan-out lines are arranged in different layers; the orthographic projections of two adjacent second winding portions on the plane where the display panel is located overlap.

[0015] In some embodiments, two adjacent second-type fan-out lines are arranged in different layers; the orthographic projections of two adjacent second winding portions on the plane where the display panel is located do not overlap.

[0016] In some embodiments, adjacent first-type fan-out lines and second-type fan-out lines are disposed in different layers, and in the thickness direction of the display panel, the first winding portion of the adjacent first-type fan-out line and the second winding portion of the adjacent first-type fan-out line overlap on the orthographic projection portion of the plane where the display panel is located.

[0017] In some embodiments, the resistance of the first type of fan-out line is equal to the resistance of the second type of fan-out line.

[0018] In some embodiments, the length of the first type of fan-out line is equal to the length of the second type of fan-out line.

[0019] In some embodiments, among the multiple fan-out lines arranged on the same layer, the spacing between two adjacent winding portions is a set value.

[0020] In some embodiments, among the plurality of first-type fan-out lines arranged in the same layer, the minimum spacing between two adjacent first winding portions is greater than or equal to 3 μm.

[0021] On the other hand, a display device is provided. The display device includes: a display panel as described in any of the above embodiments, and a display chip; the display chip is bonded to a plurality of fan-out lines in the display panel. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0023] Figure 1 is a plan view of a display device according to some embodiments;

[0024] Figure 2 is a structural diagram of a display panel according to some embodiments;

[0025] Figure 3 is a structural diagram of an improved display panel according to some embodiments;

[0026] Figure 4 is a structural diagram of a first type of fan-out line arrangement according to some embodiments;

[0027] Figure 5 is a cross-sectional structural diagram of a first type of fan-out line arrangement according to some embodiments;

[0028] Figure 6 is a structural diagram of another display panel according to some embodiments;

[0029] Figure 7 is a structural diagram of a first type of fan-out line according to some embodiments;

[0030] Figure 8 is a structural diagram of a plurality of first-type fan-out lines arranged according to some embodiments;

[0031] Figure 9 is a cross-sectional structural diagram of a plurality of first-type fan-out lines arranged according to some embodiments;

[0032] Figure 10 is a detailed structural diagram of a first type of fan-out line according to some embodiments;

[0033] Figure 11 is a detailed structural diagram of a plurality of first-type fan-out lines according to some embodiments;

[0034] Figure 12 is a structural diagram of a multiple repeating unit arrangement according to some embodiments;

[0035] Figure 13 is a cross-sectional structural diagram of a plurality of repeating units arranged according to some embodiments;

[0036] Figure 14 is a structural diagram of a minimum spacing arrangement of multiple repeating units according to some embodiments;

[0037] Figure 15 is a structural diagram of another type of first-class fan-out line according to some embodiments;

[0038] Figure 16 is a structural diagram of another arrangement of multiple first-type fan-outlines according to some embodiments;

[0039] Figure 17 is a cross-sectional structural diagram of another arrangement of multiple first-type fan-outlines according to some embodiments;

[0040] Figure 18 is a structural diagram of another arrangement of multiple repeating units with minimum spacing according to some embodiments;

[0041] Figure 19 is a structural diagram of another display panel according to some embodiments;

[0042] Figure 20 is a structural diagram of a second type of fan-out line according to some embodiments;

[0043] Figure 21 is a cross-sectional structural diagram of a second type of fan-out line according to some embodiments;

[0044] Figure 22 is a structural diagram of another type of second fan-out line according to some embodiments;

[0045] Figure 23 is a cross-sectional structural diagram of another type of second-type fan-out line according to some embodiments;

[0046] Figure 24 is a structural diagram of a first type of fan-out line and a second type of fan-out line arrangement according to some embodiments;

[0047] Figure 25 is a cross-sectional structural diagram of a first type fan-out line and a second type fan-out line according to some embodiments;

[0048] Figure 26 is a structural diagram of a first type of fan-out winding method according to some embodiments;

[0049] Figure 27 is a structural diagram of another type of first-class fan-out winding method according to some embodiments. Detailed Implementation

[0050] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0051] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0052] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0053] In describing some embodiments, the terms "coupled" and "connected," and their derivative expressions, may be used. The term "connected" should be interpreted broadly; for example, a "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection via an intermediate medium. The term "coupled," for example, indicates that two or more components have direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0054] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0055] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0056] The use of “applies to” or “configured to” in this article implies an open and inclusive language that does not preclude applicability to or configuration to devices that perform additional tasks or steps.

[0057] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0058] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0059] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable range of deviation for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0060] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0061] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0062] As shown in Figure 1, some embodiments of this disclosure provide a display device 1000. The display device 1000 provided in the embodiments of this disclosure can be any device that displays either moving (e.g., video) or fixed (e.g., still images), and whether it is text or images. More specifically, it is contemplated that the embodiments can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures (e.g., displays of images of a piece of jewelry), etc. The embodiments of this disclosure do not specifically limit the form of the display device 1000.

[0063] Specifically, as shown in FIG1, the display device 1000 is used as a mobile phone for illustrative purposes in this embodiment of the present disclosure.

[0064] As shown in Figure 2, the display device 1000 includes a display panel 100. The display device 1000 also includes a frame, a circuit board, a driver chip, and other electronic components. The display panel 100 is disposed within the frame, and the driver chip drives the display panel 100 to perform display. The display device 1000 also includes a bonding area 3, one end of which is electrically connected to the display panel 100, and the other end of which is electrically connected to the driver chip.

[0065] For example, as shown in FIG2, taking the display panel 100 as an OLED (Organic Light-Emitting Diode) display panel, the display panel 100 includes: a display area 10 and a non-display area 20, wherein the non-display area 20 is disposed on at least one side of the display area 10.

[0066] The non-display area 20 includes a fan-out area 2 and a bonding area 3. The fan-out area 2 is located on one side of the display area 10, and the bonding area 3 is located on the side of the fan-out area 2 away from the display area 10. The fan-out area 2 has multiple fan-out lines 21, and the bonding area 3 has multiple bonding electrodes 301. Each fan-out line 21 is connected to one bonding electrode 301. For example, the multiple fan-out lines 21 are arranged along a first direction X, and the multiple bonding electrodes 301 are arranged along the first direction X. The display area 10 has multiple signal lines, and one fan-out line 21 is connected to one signal line. The display drive signal is transmitted to the signal line of the display area 10 through the bonding electrode 301 and the fan-out line 21, thereby controlling the display area 10 to display. The signal line is, for example, a data line 1 or a power supply voltage line.

[0067] From the display area 10 towards the fan-out area 2, the multiple fan-out lines 21 tend to converge inwards, and the overall size of the multiple fan-out lines 21 gradually narrows along the first direction X. For example, the overall size L1 of the multiple bonding electrodes 301 along the first direction X is smaller than the maximum size L2 of the multiple fan-out lines along the first direction. That is, the multiple bonding electrodes 301 are more compact and occupy a smaller area than the multiple fan-out lines 21.

[0068] Fan-out region 2 includes a first region A and a second region B located on opposite sides of the first region A; the first region A and the second region B are arranged along a first direction X. The fan-out line 21 located in the first region A includes a straight segment 21a, and the fan-out line 21 located in the second region B includes a connected straight segment 21a and a diagonal segment 21b. The extension direction of the straight segment is consistent with the extension direction of the bonding electrode 301, for example, both extending along a second direction Y, which intersects the first direction X. The extension direction of the diagonal segment 21b intersects with the extension direction of the straight segment 21a.

[0069] Because the multiple bonding electrodes 301 are more compact than the multiple fan-out lines 21, the distance between the signal line located at the edge of the display area 10 and its corresponding bonding electrode is greater than the distance between the signal line located at the center of the display area 10 and its corresponding bonding electrode 301. Therefore, the length of the fan-out line 21 in the second region B is greater than the length of the fan-out line 21 in the first region A, resulting in unequal lengths of the multiple fan-out lines 21. For example, the lengths of the multiple fan-out lines 21 in the fan-out area 2 increase from the first region A to both sides. The inconsistent lengths of the multiple fan-out lines 21 will lead to inconsistent resistances. As a result, the signals transmitted by the multiple fan-out lines 21 will be affected by the resistance differences, resulting in signal non-uniformity, such as uneven current distribution. Consequently, the display area of ​​the display panel will exhibit uneven brightness, affecting the display effect. To solve the problem of uneven display, the lengths of the multiple fan-out lines need to be consistent so that the resistances of the multiple fan-out lines are consistent or approximately consistent.

[0070] For example, as shown in FIG3, in order to increase the length of the fan-out line 21 in the first region of the fan-out area 2, the length of the fan-out line is mainly increased by winding it in a serpentine or bow-shaped manner, thereby increasing the resistance of the fan-out line 21 in the first region of the fan-out area 2. In some embodiments, two adjacent fan-out lines with serpentine winding are located on the same layer, and there is a spacing requirement between the two adjacent fan-out lines. Alternatively, as shown in FIG3 to FIG5, two adjacent fan-out lines with serpentine winding are located on different layers, and the two adjacent fan-out lines on different layers are spaced apart. There is a spacing requirement between adjacent fan-out lines on the same layer. Therefore, the space utilization rate of this wiring method is not high. When the wiring space in the fan-out area is limited, the winding design of the fan-out line in the first region has limited length increase of the fan-out line and insufficient resistance compensation value. It cannot make up for the resistance difference of the fan-out line in the second region, resulting in poor display uniformity of the display panel. (Refer to FIG4).

[0071] In some embodiments, as shown in Figures 4 and 5, Figure 4 is an enlarged view of two fan-out lines in the central region of the fan-out area in Figure 3 with a serpentine winding design, and Figure 5 is a cross-sectional view of the central region of the fan-out area in Figure 3. The distance between adjacent fan-out lines on the same layer needs to be greater than or equal to a set distance d1, such as 3 μm. The distance between adjacent fan-out lines on different layers also needs to meet the requirements. For example, the first fan-out line 21a and the second fan-out line 21b are spaced apart in the first direction X. Under this scheme, the resistance per unit length of fan-out line is 0.62 Ω / μm, which does not meet the resistance value requirement.

[0072] Based on the above problems, as shown in FIG6, some embodiments of this disclosure provide a display panel 100. The display substrate has a fan-out region 2.

[0073] Fan-out area 2 includes a first area A and a second area B located on opposite sides of the first area A; the first area A and the second area B are arranged along the first direction X.

[0074] Wherein, the first direction X is bidirectional, and the second region B includes: a first second region B1 and a second second region B2, which are located on opposite sides of the first region A. The first second region B1 is located on one side of the first region A along the first direction X, and the second second region B2 is located on the other side of the first region A along the first direction X.

[0075] The display panel 100 includes multiple fan-out lines 21; the multiple fan-out lines 21 include multiple first-type fan-out lines 211 and multiple second-type fan-out lines 212; the multiple first-type fan-out lines 211 are located in a first region A, and the multiple second-type fan-out lines 212 are located in a second region B.

[0076] Among them, the lengths of multiple first-type fan-out lines 211 in the first region A are the same.

[0077] As shown in Figures 6 and 7, each of the multiple first-type fan-out lines 211 includes a first winding portion 211A. The area occupied by the first winding portion 211A in the second direction Y has a dimension L3 that is smaller than the length L4 of the first winding portion 211A. The first direction X intersects with the second direction Y.

[0078] The first winding section 211A is designed with a bending feature. The first winding section 211A is divided into multiple sub-segments, which are connected sequentially. The angle between two adjacent sub-segments is less than 180 degrees, that is, the extension directions of two adjacent sub-segments are different. The length L4 of the first winding section 211A is the sum of the lengths of the multiple sub-segments. As shown on the right side of Figure 7, arranging the various sub-sections of the first winding section 211A along the same extension direction is equivalent to straightening the multiple sub-segments of the serpentine winding. The length L4 of the first winding section 211A can be shown.

[0079] Referring to Figures 7, 8 and 9, two adjacent first-type fan-out lines 211 are arranged in different layers along the first direction X; in the thickness direction Z of the display panel, the first winding portions 211A of the two adjacent first-type fan-out lines 211 overlap on the plane where the display panel 100 is located.

[0080] Referring to Figure 8, which shows eight Class I fan-out lines, namely the first Class I fan-out line 211a, the second Class I fan-out line 211b, the third Class I fan-out line 211c, the fourth Class I fan-out line 211d, the fifth Class I fan-out line 211e, the sixth Class I fan-out line 211f, the seventh Class I fan-out line 211g, and the eighth Class I fan-out line 211h.

[0081] The first type of fan-out line 211a includes a first winding portion 211Aa, and the second type of fan-out line 211b includes a first winding portion 211Ab. The first type of fan-out line 211a and the second type of fan-out line 211b are adjacent to each other, and the first winding portion 211Aa of the first type of fan-out line 211a and the first winding portion 211Ab of the second type of fan-out line 211b overlap in their orthographic projections on the plane where the display panel 100 is located.

[0082] Two adjacent Type I fan-out lines 211 are configured on different layers. Taking the above eight Type I fan-out lines as an example, for instance, the first Type I fan-out line 211a and the second Type I fan-out line 211b are adjacent and located on different layers; the second Type I fan-out line 211b and the third Type I fan-out line 211c are adjacent and located on different layers; the third Type I fan-out line 211c and the fourth Type I fan-out line 211d are adjacent and located on different layers, and so on.

[0083] Referring to Figure 9, which is a cross-sectional view obtained from the CC section line in Figure 8, the first type I fan-out line 211a, the third type I fan-out line 211c, the fifth type I fan-out line 211e, and the seventh type I fan-out line 211g are located on the same layer. The second type I fan-out line 211b, the fourth type I fan-out line 211d, the sixth type I fan-out line 211f, and the eighth type I fan-out line 211h are also located on the same layer. Thus, the above arrangement enables any two adjacent type I fan-out lines to be set on different layers.

[0084] In some embodiments, the display panel 100 includes: a plurality of gate conductive layers stacked together; two adjacent first-type fan-out lines are respectively located in different gate conductive layers. For example, the display panel 100 in FIG. 9 includes two gate conductive layers, namely a first gate conductive layer gate1 and a second gate conductive layer gate2. The first first-type fan-out line 211a, the third first-type fan-out line 211c, the fifth first-type fan-out line 211e, and the seventh first-type fan-out line 211g are located in the first gate conductive layer gate1; the second first-type fan-out line 211b, the fourth first-type fan-out line 211d, the sixth first-type fan-out line 211f, and the eighth first-type fan-out line 211h are located in the second gate conductive layer gate2.

[0085] The first gate conductive layer gate1 and the second gate conductive layer gate2 are separated from each other by the first insulating layer GI1, and the second insulating layer GI2 is used to isolate the second gate conductive layer gate2 from the metal layer located above the second gate conductive layer gate2.

[0086] It should be noted that Figure 9 is only one embodiment, and the first type of fan-out line can also be set in other suitable film layers. At the same time, Figures 8 and 9 are only embodiments in which multiple first type fan-out lines are located in two layers. Multiple first type fan-out lines can also be set in three or four layers, which can further improve the space utilization rate, and the number of layers is not limited, as long as it is greater than or equal to two layers.

[0087] The overlapping of the first winding portions 211A of two adjacent first-type fan-out lines 211 on the plane of the display panel 100 can be understood as the partial overlap of the first winding portions 211A of two adjacent first-type fan-out lines 211 in the thickness direction Z of the display panel; in the first winding portions 211A of two adjacent first-type fan-out lines 211, a part of one first winding portion is disposed directly above a part of the other winding portion, and the orthogonal projections of the two first winding portions on the substrate of the display panel partially overlap.

[0088] The number of fan-out lines 21 in the fan-out area 2 on the display panel 100 is a fixed value. The size of the fan-out area is limited by the size of the display panel and can also be considered a fixed value. Furthermore, there is a distance requirement between the fan-out lines 21 on the same layer (see Figure 3). If the scheme shown in Figure 3 is adopted, and there is a spacing requirement between the first winding portions of adjacent first-type fan-out lines, then under the constraints of the number of first-type fan-out lines and the space of the fan-out area, the size of the first winding portion 211A of the first-type fan-out line 211 along the first direction is limited, resulting in a limitation on the total length of the first winding portion 211A (see Figure 8). If the fan-out lines are arranged in a way that the adjacent two first winding portions partially overlap, the space utilization rate of the fan-out lines is improved. Then the size of the first winding portion 211A of the first-type fan-out line 211 along the first direction can be increased, thereby making the total length of the first winding portion 211A of the first-type fan-out line 211 longer, and the corresponding resistance can be increased.

[0089] It should be noted that the central area of ​​the fan-out region in Figure 6 only shows two fan-out lines that need to be changed in a serpentine winding manner. The fan-out lines that need to be wound should be designed according to the actual situation. If the length difference between the fan-out lines on the sides is small, the winding design can be omitted, and the final impact on the display can be ignored.

[0090] In summary, some embodiments of this application provide a display panel that, by arranging adjacent first-type fan-out lines in different layers and partially overlapping them, makes the arrangement of adjacent first-type fan-out lines on different layers more compact when the number of first-type fan-out lines and the size of the fan-out area are fixed. This improves the space utilization of the first-type fan-out lines, effectively increasing the wiring space size of the fan-out area in the first direction X. The size of the first winding portion of the first-type fan-out line along the first direction X can be further increased, thereby further increasing the total length of the first winding portion of the first-type fan-out line. This makes the total length of the first-type fan-out line closer to the total length of the second-type fan-out line, further increasing the resistance of the first-type fan-out line and reducing the difference in resistance between the first-type and second-type fan-out lines, thus solving the problem of uneven display in the display area of ​​the display panel. Furthermore, the above arrangement does not change the film layer setting of the fan-out lines or the width and thickness of the fan-out lines (width and thickness are related to the cross-sectional area). It only improves the space utilization through wiring to achieve the purpose of increasing resistance, resulting in lower process complexity and better resistance improvement.

[0091] In some embodiments, the fan-out wiring method shown in Figure 8 is adopted, and the resistance of the first type of fan-out line per unit length is 0.94Ω / μm, which is a significant improvement compared to the resistance of 0.62Ω / μm of the first type of fan-out line in the existing solution.

[0092] In some embodiments, among the plurality of first-type fan-out lines 211 arranged on the same layer, the minimum spacing between two adjacent first winding portions 211A is greater than or equal to a predetermined distance, such as 3 μm. Figure 9 is only one embodiment with a spacing of 3 μm. This arrangement can reduce the risk of short circuits between adjacent first winding portions while still allowing for the arrangement of a large number of first-type fan-out lines within a limited space.

[0093] As shown in Figure 10, the first winding portion 211A includes: at least two first sub-portions 11 and at least one second sub-portion 12; adjacent first sub-portions 11 and second sub-portions 12 are connected end to end in sequence; the first sub-portion 11 extends along the first direction X, and the second sub-portion 12 extends along the second direction Y.

[0094] In some embodiments, the line length L5 of the first sub-part is greater than the line length L6 of the second sub-part. Since the size of the fan-out region along the second direction Y is fixed, increasing the total length of the first winding portion 211A requires increasing the line length L5 of the first sub-part. The longer the line length L5 of the first sub-part, the longer the total length of the first winding portion 211A.

[0095] In some embodiments, at least a portion of the first sub-parts 11 in the first winding portion 211A have equal wire lengths.

[0096] Referring to Figure 10, the first winding portion includes a plurality of first sub-portions 11. Exemplarily, at least some of the first sub-portions 11 refer to the plurality of first sub-portions 11 located in the middle position of the first winding portion 211A, excluding the two first sub-portions 11 closest to and connecting the two ends 211B of the first winding portion 211A. The lengths of the plurality of first sub-portions 11 located in the middle position are all equal. This arrangement makes the structure of the first winding portion 211A regular and facilitates control of the total length of the first winding portion 211A.

[0097] Of the two ends 211B of the first winding portion 211A, one end 211B is connected to the data line 1 in the display area 10, and the other end 211B needs to be connected to the binding electrode 301 in the binding area 3. To match the positions of the data line 1 and the binding electrode 301, for example, the two ends 211B are located on the center line M of the first winding portion 211A extending along the second direction Y. The two first sub-parts 11 that are closest to the two ends 211B of the first winding portion 211A in the first direction X are shorter than the first sub-part 11 that is in the middle position, so that the two first sub-parts 11 can be connected to the two ends 211B.

[0098] In some embodiments, as shown in FIG11, in the first direction X, two adjacent first winding portions 211A include a first sub-winding portion 211A1 and a second sub-winding portion 211A2; a first sub-part 11 of the first sub-winding portion 211A1 overlaps with the orthographic projection portion of a first sub-part 11 of the second sub-winding portion 211A2 on the plane where the display panel 100 is located.

[0099] In Figure 11, region P is the area where a first sub-section 11 in the first sub-winding section 211A1 partially overlaps with a first sub-section 11 in the second sub-winding section 211A2.

[0100] For example, the number of first sub-parts 11 included in the first sub-winding portion 211A1 and the second sub-winding portion 211A2 is equal, the number of second sub-parts 12 included in the first sub-winding portion 211A1 and the second sub-winding portion 211A2 is equal, the positions of the plurality of first sub-parts 11 of the first sub-winding portion 211A1 and the plurality of first sub-parts 11 of the second sub-winding portion 211A2 correspond one-to-one, and the corresponding two first sub-parts 11 partially overlap.

[0101] In some embodiments, referring to FIG11, the lengths of the overlapping first sub-parts 11 in two adjacent first winding portions 211A are equal.

[0102] In Figure 11, region P is the area where a first sub-part 11 of the first sub-winding part 211A1 and a first sub-part 11 of the second sub-winding part 211A2 partially overlap. At this time, the line lengths of the two overlapping first sub-parts 11 are equal. In this way, the two adjacent first winding parts 211A have the same shape, which can ensure that the line lengths of the two first winding parts 211A are equal and can also simplify the manufacturing process of multiple first winding parts 211A.

[0103] In some embodiments, as shown in Figures 12 and 16, n adjacent first-type fan-out lines 211 constitute a repeating unit 30; each first-type fan-out line 211 within the repeating unit 30 is arranged in a different layer. The ratio of the size of the overlapping portion of the orthographic projection of two adjacent first winding portions 211A on the plane of the display panel 100 in the first direction X to the size of the orthographic projection of the first winding portion 211A on the plane of the display panel 100 in the first direction X is less than (n-1) / n; n is a positive integer greater than 1.

[0104] In other words, in the thickness direction Z of the display panel 100, the ratio of the size of the overlapping portion of two adjacent first winding portions 211A in the first direction X to the size of the orthographic projection of the first winding portion 211A on the display panel in the first direction X is less than (n-1) / n; n is a positive integer greater than 1.

[0105] When n=2: For example, in Figure 12, the first type 1 fan-out line 211a and the second type 1 fan-out line 211b constitute the first repeating unit 31; the third type 1 fan-out line 211c and the fourth type 1 fan-out line 211d constitute the second repeating unit 32; the fifth type 1 fan-out line 211e and the sixth type 1 fan-out line 211f constitute the third repeating unit 33; and the seventh type 1 fan-out line 211g and the eighth type 1 fan-out line 211h constitute the fourth repeating unit 34.

[0106] When n=3: For example, in Figure 16, the first fan-out line 211a, the second fan-out line 211b, and the third fan-out line 211c constitute the fifth repeating unit 35; the fourth fan-out line 211d, the fifth fan-out line 211e, and the sixth fan-out line 211f constitute the sixth repeating unit 36; and the seventh fan-out line 211g, the eighth fan-out line 211h, and the ninth fan-out line 211i constitute the seventh repeating unit 37.

[0107] It should be noted that, referring to Figures 12 and 16, the labels of the first type of fan-out lines are divided into two groups: (211a, 211b...211g) and (2111, 2112...211n). In the following description, the first first type of fan-out line 211a to the ninth first type of fan-out line 211i are labels defined by taking multiple first fan-out lines as a whole and sorting them in a set order (from left to right). When multiple first fan-out lines are divided into repeated units of n adjacent units, each repeated unit includes n first fan-out lines. For example, a repeated unit includes the first first fan-out line 2111, the second first fan-out line 2112...the nth first fan-out line 211n.

[0108] Referring to Figure 13, which is a cross-sectional view obtained from the DD section line in Figure 12, as shown in Figures 12 and 13, each repeating unit includes two first-type fan-outlines.

[0109] In the first repeating unit 31, the first first type fan-out line 2111 (i.e. the first first type fan-out line 211a in the overall sequence) is located in the first gate conductive layer gate1, and the second first type fan-out line 2112 (i.e. the second first type fan-out line 211b in the overall sequence) is located in the second gate conductive layer gate2; that is, the first type fan-out lines in the first repeating unit 31 are set in different layers.

[0110] In the second repeating unit 32, the first first type fan-out line 2111 (i.e. the third first type fan-out line 211c in the overall sequence) is located in the first gate conductive layer gate1, and the second first type fan-out line 2112 (i.e. the fourth first type fan-out line 211d in the overall sequence) is located in the second gate conductive layer gate2; that is, the first type fan-out lines in the second repeating unit 32 are set in different layers.

[0111] In the third repeating unit 33, the first first type fan-out line 2111 (i.e. the fifth first type fan-out line 211e in the overall sequence) is located in the first gate conductive layer gate1, and the second first type fan-out line 2112 (i.e. the sixth first type fan-out line 211f in the overall sequence) is located in the second gate conductive layer gate2; that is, the first type fan-out lines in the third repeating unit 33 are set in different layers.

[0112] In the fourth repeating unit 34, the first first type fan-out line 2111 (i.e. the seventh first type fan-out line 211g in the overall sequence) is located in the first gate conductive layer gate1, and the second first type fan-out line 2112 (i.e. the eighth first type fan-out line 211h in the overall sequence) is located in the second gate conductive layer gate2; that is, the first type fan-out lines in the fourth repeating unit 34 are arranged in different layers.

[0113] Referring to Figure 17, which is a cross-sectional view obtained from the EE section line in Figure 16, each repeating unit includes three first-type fan-outlines as shown in Figures 16 and 17.

[0114] In the fifth repeating unit 35, the first first-type fan-out line 2111 (i.e., the first first-type fan-out line 211a in the overall sequence) is located in the first gate conductive layer gate1, the second first-type fan-out line 2112 (i.e., the second first-type fan-out line 211b in the overall sequence) is located in the second gate conductive layer gate2; the third first-type fan-out line 2113 (i.e., the third first-type fan-out line 211c in the overall sequence) is located in the third gate conductive layer gate3; that is, the first-type fan-out lines in the fifth repeating unit 35 are arranged in different layers.

[0115] In the sixth repeating unit 36, the first first-type fan-out line 2111 (i.e., the fourth first-type fan-out line 211d in the overall sequence) is located in the first gate conductive layer gate1, the second first-type fan-out line 2112 (i.e., the fifth first-type fan-out line 211e in the overall sequence) is located in the second gate conductive layer gate2; the third first-type fan-out line 2113 (i.e., the sixth first-type fan-out line 211f in the overall sequence) is located in the third gate conductive layer gate3; that is, the first-type fan-out lines in the sixth repeating unit 36 ​​are arranged in different layers.

[0116] In the seventh repeating unit 37, the first first-type fan-out line 2111 (i.e., the seventh first-type fan-out line 211g in the overall sequence) is located in the first gate conductive layer gate1, the second first-type fan-out line 2112 (i.e., the eighth first-type fan-out line 211h in the overall sequence) is located in the second gate conductive layer gate2; the third first-type fan-out line 2113 (i.e., the ninth first-type fan-out line 211i in the overall sequence) is located in the third gate conductive layer gate3; that is, the first-type fan-out lines in the seventh repeating unit 37 are arranged in different layers.

[0117] Adjacent n first-type fan-out lines 211 constitute repeating unit 30. In the thickness direction Z of the display panel 100, the ratio of the size of the overlapping part of two adjacent first winding portions 211A in the first direction X to the size of the orthographic projection of the first winding portion on the display panel in the first direction X is less than (n-1) / n; n is a positive integer greater than 1.

[0118] For example, when n=2, two adjacent first-type fan-out lines 211 form a repeating unit 30 and are arranged in different layers. Referring to Figures 11 and 12, the overlapping of two adjacent first winding portions 211A includes the overlapping of the first winding portions of two adjacent first-type fan-out lines within the same repeating unit, and also includes the overlapping of the first winding portions of two adjacent first-type fan-out lines located in different repeating units but adjacent to each other in two adjacent repeating units.

[0119] For example, for the first repeating unit 31, the overlapping portion of the first winding portion 211Aa of the adjacent first type fan-out line 211a and the first winding portion 211Ab of the second type fan-out line 211b has a size of L5 in the first direction X; the orthographic projection of the first winding portion 211Aa on the display panel 100 has a size of L5 in the first direction X, and the ratio of L7 to L5 is less than 1 / 2.

[0120] For example, for the first repeating unit 31 and the second repeating unit 32, the overlapping portion of the first winding portion 211Ab of the second first type fan-out line 211b of the first repeating unit 31 and the first winding portion 211Ac of the third first type fan-out line 211c of the second repeating unit 32 has a size of L7 in the first direction X; the orthographic projection of the first winding portion 211A on the display panel 100 has a size of L5 in the first direction X, and the ratio of L7 to L5 is less than 1 / 2.

[0121] Since there needs to be a gap between two adjacent first winding portions 211A in the multiple first type fan-out lines 211 arranged in the same layer, for example, a minimum gap of 3μm or more, the size of the overlapping portion of the first winding portions 211A of two adjacent first type fan-out lines 211 in the first layer in the first direction X needs to be less than L5 / 2, that is, the ratio of L7 to L5 needs to be less than 1 / 2.

[0122] This configuration maximizes the overlap between two adjacent Type I fan-out lines on different floors, ensuring that adjacent Type I fan-out lines on the same floor are spaced apart and do not short-circuit. This results in a maximum overlap of approximately 1 / 2, but not equal to 1 / 2, maximizing space utilization and allowing the length of the Type I fan-out lines to be increased as much as possible.

[0123] In some embodiments, the fan-out wiring method shown in Figure 11 is adopted, and the resistance of the first type of fan-out line per unit length is 1.5Ω / μm, which is a significant improvement compared to the resistance of 0.62Ω / μm of the first type of fan-out line in the existing solution.

[0124] In some embodiments, among the plurality of first-type fan-out lines 211 arranged on the same layer, the minimum spacing between two adjacent first winding portions 211A is greater than or equal to 3 μm. Figure 13 is only one embodiment with a spacing of 3 μm. This arrangement can reduce the risk of short circuits between adjacent first winding portions while still allowing for the arrangement of a large number of first-type fan-out lines within a limited space.

[0125] As shown in Figures 15 and 16, since the n adjacent first-type fan-out lines 211 are arranged in different layers, if n=3, it means that a total of three layers are arranged. The three adjacent first-type fan-out lines 211 are arranged in the first layer, the second layer, and the third layer, respectively, which are the first gate conductive layer gate1, the second gate conductive layer gate2, and the third gate conductive layer gate3 in Figure 16. The overlapping of three adjacent first winding portions 211A includes the overlapping of the first winding portions 211A of three adjacent first-type fan-out lines 211 within the same repeating unit, and also includes the overlapping of the first winding portions of three adjacent first-type fan-out lines located in different repeating units within two adjacent repeating units.

[0126] In some embodiments, as shown in FIG15, in the first direction X, three adjacent first winding portions 211A include a first sub-winding portion 211A1, a second sub-winding portion 211A2, and a third sub-winding portion 211A3; a first sub-part 11 in the first sub-winding portion 211A1 partially overlaps with a first sub-part 11 in the second sub-winding portion 211A2; a first sub-part 11 in the second sub-winding portion 211A2 partially overlaps with a first sub-part 11 in the third sub-winding portion 211A3.

[0127] In Figure 15, region P1 is the area where a first sub-part 11 in the first sub-winding section 211A1 and a first sub-part 11 in the second sub-winding section 211A2 partially overlap. Region P2 is the area where a first sub-part 11 in the second sub-winding section 211A2 and a first sub-part 11 in the third sub-winding section 211A3 partially overlap.

[0128] For example, the number of first sub-parts 11 included in the first sub-winding part 211A1, the second sub-winding part 211A2, and the third sub-winding part 211A3 is equal, the number of second sub-parts 12 included in the first sub-winding part 211A1, the second sub-winding part 211A2, and the third sub-winding part 211A3 is equal, the positions of the plurality of first sub-parts 11 of the first sub-winding part 211A1 and the plurality of first sub-parts 11 of the second sub-winding part 211A2 correspond one-to-one, the positions of the plurality of first sub-parts 11 of the second sub-winding part 211A2 and the plurality of first sub-parts 11 of the third sub-winding part 211A3 correspond one-to-one, and the corresponding two first sub-parts 11 partially overlap.

[0129] For example, the first winding portion 211A of one first-type fan-out line 211 of the first repeating unit and the first winding portion 211A of two first-type fan-out lines 211 of the second repeating unit form three adjacent first-type fan-out lines, and the first winding portions of the three first-type fan-out lines overlap; the first winding portion 211A of two first-type fan-out lines 211 of the first repeating unit and the first winding portion 211A of one first-type fan-out line 211 of the second repeating unit form three adjacent first-type fan-out lines, and the first winding portions of the three first-type fan-out lines overlap.

[0130] For example, for the fifth repeating unit 35, the overlapping portion of the first winding portion 211Aa of the adjacent first type of fan-out line 211a and the first winding portion 211Ab of the second type of fan-out line 211b has a dimension of L8 in the first direction X; the orthographic projection of the first winding portion 211A on the display panel 100 has a dimension of L5 in the first direction X, and the ratio of L8 to L5 is less than 2 / 3. The overlapping portion of the first winding portion 211Ab of the adjacent second type of fan-out line 211b and the first winding portion 211Ac of the third type of fan-out line 211c also has a dimension of L8 in the first direction X; the orthographic projection of the first winding portion 211A on the display panel 100 has a dimension of L5 in the first direction X, and the ratio of L8 to L5 is less than 2 / 3.

[0131] For example, for the fifth repeating unit 35 and the sixth repeating unit 36, the overlapping portion of the first winding portion 211Ac of the third first-type fan-out line 2113 of the fifth repeating unit 35 (i.e., the third first-type fan-out line 211c in the overall sequence) and the first winding portion 211Ad of the first first-type fan-out line 2111 of the sixth repeating unit 36 ​​(i.e., the first winding portion 211Ad of the fourth first-type fan-out line 211d in the overall sequence) in the first direction X has a size of L8; the orthographic projection of the first winding portion 211A on the display panel 100 has a size of L5 in the first direction X, and the ratio of L8 to L5 is less than 2 / 3.

[0132] Since the minimum spacing between two adjacent first winding portions 211A in the multiple first-type fan-out lines 211 arranged in the same layer is greater than or equal to 3μm, the size of the overlapping portion of the first winding portions 211A of two adjacent first-type fan-out lines 211 in the first layer in the first direction X needs to be less than 2*L5 / 3, that is, the ratio of L8 to L5 needs to be less than 2 / 3.

[0133] This configuration ensures that adjacent first-class fan-out lines 211 on the same floor are spaced apart and do not short-circuit, while maximizing the overlap of two adjacent first-class fan-out lines 211 on different floors, which is close to 2 / 3 but not equal to 2 / 3. This maximizes space utilization and allows the length of the first-class fan-out lines 211 to be increased as much as possible.

[0134] In some embodiments, the fan-out wiring method shown in Figure 15 is adopted, and the resistance of the first type of fan-out line 211 per unit length is 2.3Ω / μm, which is a significant improvement compared to the resistance of 0.62Ω / μm of the first type of fan-out line 211 in the prior art.

[0135] In some embodiments, among the plurality of first-type fan-out lines 211 arranged on the same layer, the minimum spacing between two adjacent first winding portions 211A is greater than or equal to 3 μm. Figure 17 is only one embodiment with a spacing of 3 μm. This arrangement can reduce the risk of short circuits between adjacent first winding portions while still allowing for the arrangement of a large number of first-type fan-out lines within a limited space.

[0136] In some embodiments, the i-th first type fan-out line arranged along the first direction X in each repeating unit is set on the same layer; i is a positive integer, i≤n.

[0137] When n=2, referring to Figures 11-14, i≤2 must be satisfied. If i=1: the first first-type fan-out line 2111 arranged along the first direction X in the first repeating unit 31 (i.e., the first first-type fan-out line 211a in the overall sorting) is set in the first gate conductive layer gate1; the first first-type fan-out line 2111 arranged along the first direction X in the second repeating unit 32 (i.e., the third first-type fan-out line 211c in the overall sorting) is set in the first gate conductive layer gate1; the first first-type fan-out line 2111 arranged along the first direction X in the third repeating unit 33 (i.e., the fifth first-type fan-out line 211e in the overall sorting) is set in the first gate conductive layer gate1; the first first-type fan-out line 2111 arranged along the first direction X in the fourth repeating unit 34 (i.e., the seventh first-type fan-out line 211g in the overall sorting) is set in the first gate conductive layer gate1; the first four first-type fan-out lines arranged along the first direction X in the four repeating units are all set in the first gate conductive layer gate1.

[0138] If i=2: the second first-type fan-out line 2112 (i.e., the second first-type fan-out line 211b in the overall sorting) arranged along the first direction X in the first repeating unit 31 is set in the second gate conductive layer gate2; the second first-type fan-out line 2112 (i.e., the fourth first-type fan-out line 211d in the overall sorting) arranged along the first direction X in the second repeating unit 32 is set in the second gate conductive layer gate2; the second first-type fan-out line 2112 (i.e., the sixth first-type fan-out line 211f in the overall sorting) arranged along the first direction X in the third repeating unit 33 is set in the second gate conductive layer gate2; the second first-type fan-out line 2112 (i.e., the eighth first-type fan-out line 211h in the overall sorting) arranged along the first direction X in the fourth repeating unit 34 is set in the second gate conductive layer gate2; the second four first-type fan-out lines arranged along the first direction X in the four repeating units are all set in the second gate conductive layer gate2.

[0139] In other words, the 2i-1th first type fan-out line along the first direction is located in the same gate conductive layer, and the 2i first type fan-out line is located in the same gate conductive layer.

[0140] When n=3, referring to Figures 15-18, i≤3 must be satisfied. If i=1: the first first-type fan-out line 2111 arranged along the first direction X in the fifth repeating unit 35 (i.e., the first first-type fan-out line 211a in the overall sorting) is set in the first gate conductive layer gate1; the first first-type fan-out line 2111 arranged along the first direction X in the sixth repeating unit 36 ​​(i.e., the fourth first-type fan-out line 211d in the overall sorting) is set in the first gate conductive layer gate1; the first first-type fan-out line 2111 arranged along the first direction X in the seventh repeating unit 37 (i.e., the seventh first-type fan-out line 211g in the overall sorting) is set in the first gate conductive layer gate1; and the first first-type fan-out line arranged along the first direction X in the three repeating units is set in the first gate conductive layer gate1.

[0141] If i=2: the second first-type fan-out line 2112 (i.e. the second first-type fan-out line 211b in the overall sorting) arranged along the first direction X in the fifth repeating unit 35 is set in the second gate conductive layer gate2; the second first-type fan-out line 2112 (i.e. the fifth first-type fan-out line 211e in the overall sorting) arranged along the first direction X in the sixth repeating unit 36 ​​is set in the second gate conductive layer gate2; the second first-type fan-out line 2112 (i.e. the eighth first-type fan-out line 211h in the overall sorting) arranged along the first direction X in the seventh repeating unit 37 is set in the second gate conductive layer gate2; the second first-type fan-out line arranged along the first direction X in all three repeating units is set in the second gate conductive layer gate2.

[0142] If i=3: the third first-type fan-out line 2113 (i.e., the third first-type fan-out line 211c in the overall sorting) arranged along the first direction X in the fifth repeating unit 35 is set in the third gate conductive layer gate3; the third first-type fan-out line 2113 (i.e., the sixth first-type fan-out line 211f in the overall sorting) arranged along the first direction X in the sixth repeating unit 36 ​​is set in the third gate conductive layer gate3; the third first-type fan-out line 2113 (i.e., the ninth first-type fan-out line 211i in the overall sorting) arranged along the first direction X in the seventh repeating unit 37 is set in the third gate conductive layer gate3; the third first-type fan-out line arranged along the first direction X in all three repeating units is set in the third gate conductive layer gate3.

[0143] That is, the 3i-2th first-type fan-out line 211 along the first direction is located in the same gate conductive layer, the 3i-1th first-type fan-out line 211 is located in the same gate conductive layer, and the 3ith first-type fan-out line 211 is located in the same gate conductive layer.

[0144] As shown in Figure 19, in some embodiments, at least one of the multiple second-type fan-out lines 212 includes a second winding portion 212A. That is, only some of the second-type fan-out lines 212 need to be improved with a serpentine winding method.

[0145] The length of the second winding portion 212A is less than the length of the first winding portion 211A.

[0146] It should be noted that the closer the second type of fan-out line 212 is to the first region A, the more necessary it is to use a serpentine winding method. Since the fan-out line 21 in the fan-out area 2 becomes shorter and shorter from both sides of the edge along the first direction X towards the first region A, in order to make the length of all fan-out lines basically the same, it is necessary to extend the length of the fan-out line closer to the first region A. The first type of fan-out line 211 located in the first region A all need to be extended. The second type of fan-out line 212 closer to the first region A is slightly longer than the first type of fan-out line 211, but shorter than the second type of fan-out line 212 on both sides of the fan-out area. It may need to be further extended, that is, its length can be improved by a serpentine winding method. The second type of fan-out line 212 closer to the fan-out area along the first direction X edge is longer, and its length is basically equal to that of the second type of fan-out line 212 on both sides of the edge. It can be ignored, so there is no need to improve the serpentine winding method. Therefore, only some of the second type of fan-out lines 212 need to be improved by a serpentine winding method.

[0147] Without any winding modifications, the length of the second-type fan-out line 212 is greater than the length of the first-type fan-out line 211. Therefore, the length of the second winding portion 212A of the second-type fan-out line 212 must be less than the length of the first winding portion 211A of the first-type fan-out line 211, so that the total length of the second-type fan-out line 212 equals the total length of the first-type fan-out line 211. Referring to Figure 19, the first winding portion 211A of the first-type fan-out line 211 is wound significantly more times than the second winding portion 212A of the second-type fan-out line 212. Therefore, the length of the second winding portion 212A is less than the length of the first winding portion 211A.

[0148] In some embodiments, the first region A and the second region B have a first boundary line F; at least two of the multiple second type fan-out lines 212 include a second winding portion 212A; in the at least two second winding portions 212A located in the second region B, the length of each second winding portion is negatively correlated with its distance from the first boundary line F.

[0149] The second region B comprises a first second region B1 and a second second region B2, which are located on opposite sides of the first region A. The first region A and the first second region B1 share a first boundary line F1, and the first region A and the second second region B2 share a second boundary line F2.

[0150] In the at least two second winding portions 212A located in the second region B, the line length of each second winding portion is negatively correlated with its distance from the first boundary line F. This means that the closer the second winding portion 212A is to the first boundary line F, the shorter its length is, the more winding design is needed to increase the line length, and the more times the winding is done. As a result, the closer it is to the first boundary line F, the longer the line length of the second winding portion 212A is.

[0151] For example, as shown in Figures 20 and 21, two adjacent second type fan-out lines 212 are arranged in different layers; the orthographic projections of two adjacent second winding portions 212A on the plane where the display panel 100 is located overlap.

[0152] In other words, in the thickness direction Z of the display panel 100, two adjacent second winding portions 212A overlap.

[0153] Referring to Figure 20, the area O within the dashed box is the overlapping area of ​​two adjacent second winding portions 212A.

[0154] Referring to Figure 21, the second type of fan-out line 212 includes: a first type of fan-out line 212a, a second type of fan-out line 212b, a third type of fan-out line 212c, and a fourth type of fan-out line 212d. The first type of fan-out line 212a and the third type of fan-out line 212c are located in the first gate conductive layer gate1, and the second type of fan-out line 212b and the fourth type of fan-out line 212d are located in the second gate conductive layer gate2; the first type of fan-out line 212a and the second type of fan-out line 212b are adjacent to each other, and they belong to different gate conductive layers.

[0155] For example, as shown in Figures 22 and 23, two adjacent second type fan-out lines 212 are arranged in different layers; the orthographic projections of two adjacent second winding portions 212A on the plane where the display panel 100 is located do not overlap.

[0156] In other words, in the thickness direction Z of the display panel, the two adjacent second winding portions 212A do not overlap.

[0157] Referring to Figure 22, there is a gap between two adjacent second winding portions 212A, and they do not overlap in the thickness direction Z.

[0158] Referring to Figure 23, the second type of fan-out line 212 includes: a first type of fan-out line 212a, a second type of fan-out line 212b, a third type of fan-out line 212c, and a fourth type of fan-out line 212d. The first type of fan-out line 212a and the third type of fan-out line 212c are located in the first gate conductive layer gate1, and the second type of fan-out line 212b and the fourth type of fan-out line 212d are located in the second gate conductive layer gate2; the first type of fan-out line 212a and the second type of fan-out line 212b are adjacent to each other, and they belong to different gate conductive layers.

[0159] For example, referring to FIG24, the region Q in the dashed box is the region where the orthographic projections of two adjacent first winding portions 211A and second winding portions 212A overlap on the plane where the display panel 100 is located.

[0160] Referring to Figure 25, the first type of fan-out line 211 includes: a first type of fan-out line 211a and a second type of fan-out line 211b. The second type of fan-out line 212 includes: a first type of fan-out line 212a and a second type of fan-out line 212b. The first type of fan-out line 211a and the first type of fan-out line 212a are located in the first gate conductive layer gate1, and the second type of fan-out line 211b and the second type of fan-out line 212b are located in the second gate conductive layer gate2. The second type of fan-out line 211b and the first type of fan-out line 212a are adjacent and belong to different gate conductive layers.

[0161] As shown in Figures 26 and 27, in some embodiments, a plurality of first-type fan-out lines 211 are arranged on the same layer, and at least two adjacent first-type fan-out lines are wound in parallel along the same trajectory and are interlocked with each other; and each first-type fan-out line 211 includes a first winding portion 211A, the first winding portion having the same length.

[0162] Multiple first-type fan-out lines wound in parallel along the same trajectory constitute a winding unit 40. Along the first direction X, the width W12 of the winding unit 40 is greater than or equal to the width W11 of the first-type fan-out line 211; along the second direction Y, the length L12 of the winding unit 40 is greater than or equal to the length L11 of the first-type fan-out line 211.

[0163] For example, referring to FIG26, two adjacent first-type fan-out lines 211 are wound in parallel along the same trajectory and are interlocked.

[0164] In some embodiments, the fan-out wiring method shown in Figure 26 is adopted, and the resistance of the first type of fan-out line per unit length is 0.77Ω / μm, which is a significant improvement compared to the resistance of 0.62Ω / μm of the first type of fan-out line in the existing solution.

[0165] For example, referring to FIG27, three adjacent first-type fan-out lines 211 are wound in parallel along the same trajectory and are interlocked. Multiple winding units 40 are arranged at intervals.

[0166] In some embodiments, the fan-out wiring method shown in Figure 27 is adopted, and the resistance of the first type of fan-out line per unit length is 0.7Ω / μm, which is a significant improvement compared to the resistance of 0.62Ω / μm of the first type of fan-out line in the existing solution.

[0167] This allows for a further reduction in the distance between two adjacent first-type fan-out lines, making the parallel winding of adjacent first-type fan-out lines more compact. This provides sufficient space to extend the length of the first-type fan-out lines along the first direction X, thereby making the length of the fan-out lines as consistent as possible, resulting in the same resistance. The current flow path in each fan-out line transmitting the same signal is as similar as possible, further improving the display effect of the display panel.

[0168] Some embodiments of this disclosure provide a display device 1000, which may be, for example, a mobile phone, tablet computer, personal digital assistant (PDA), in-vehicle computer, wearable display device, etc. This disclosure does not impose any special limitations on the specific form of the above-described display device. As shown in FIG1, the display device 1000 includes the display panel 100 provided in any of the above embodiments. Therefore, the display device 1000 provided by this invention has all the beneficial effects of the display panel 100 provided in any of the above embodiments, which will not be elaborated upon here.

[0169] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display panel having a fan-out area; the fan-out area includes a first region and second regions located on opposite sides of the first region; the first region and the second region are arranged along a first direction; The display panel includes multiple fan-out lines; the multiple fan-out lines include multiple first-type fan-out lines and multiple second-type fan-out lines; the multiple first-type fan-out lines are located in the first region, and the multiple second-type fan-out lines are located in the second region; Each of the plurality of first-type fan-out lines includes a first winding portion, the area occupied by the first winding portion in the second direction being smaller than the length of the first winding portion; the first direction intersects the second direction; Along the first direction, two adjacent first-type fan-out lines are arranged in different layers; the first winding portions of the two adjacent first-type fan-out lines have at least partial overlap in their orthographic projections on the plane where the display panel is located.

2. The display panel according to claim 1, wherein, n adjacent first-type fan-out lines constitute a repeating unit; each first-type fan-out line in the repeating unit is arranged in a different layer; The ratio of the size of the overlapping portion of the orthographic projections of two adjacent first winding portions on the plane of the display panel in the first direction to the size of the orthographic projection of the first winding portion on the plane of the display panel in the first direction is less than (n-1) / n; where n is a positive integer greater than 1.

3. The display panel according to claim 2, wherein, The i-th first-type fan-out line arranged along the first direction in each of the repeating units is set on the same layer; i is a positive integer, i≤n.

4. The display panel according to claim 2 or 3, wherein, The display panel includes: multiple gate conductive layers stacked together; Each of the first type of fan-out lines of the repeating unit is located in a different gate conductive layer.

5. The display panel according to any one of claims 1 to 4, wherein, The first winding portion includes: at least two first sub-parts and at least one second sub-part; adjacent first sub-parts and second sub-parts are connected end to end in sequence; the first sub-parts extend along the first direction, and the second sub-parts extend along the second direction; Two adjacent first winding portions include a first sub-winding portion and a second sub-winding portion; a first sub-part of the first sub-winding portion overlaps with the orthographic projection portion of a first sub-part of the second sub-winding portion on the plane where the display panel is located.

6. The display panel according to claim 5, wherein, The line length of the first sub-part is greater than the line length of the second sub-part.

7. The display panel according to claim 5 or 6, wherein, At least a portion of the first sub-sections in the first winding section have equal wire lengths.

8. The display panel according to any one of claims 1 to 7, wherein, At least one of the multiple second-type fan-out lines includes a second winding section; The length of the second winding portion is less than the length of the first winding portion.

9. The display panel according to claim 8, wherein, The first region and a second region have a first boundary line; at least two of the plurality of second-type fan-out lines include a second winding portion; In at least two of the second winding portions located in the second region, the length of each second winding portion is negatively correlated with its distance from the first boundary line.

10. The display panel according to claim 8 or 9, wherein, The two adjacent second-type fan-out lines are arranged in different layers; the orthographic projections of the two adjacent second winding portions on the plane where the display panel is located overlap.

11. The display panel according to claim 8 or 9, wherein, The two adjacent second-type fan-out lines are arranged in different layers; the orthographic projections of the two adjacent second-type winding portions on the plane where the display panel is located do not overlap.

12. The display panel according to any one of claims 9 to 11, wherein, The first type of fan-out line and the second type of fan-out line are arranged in different layers, and in the thickness direction of the display panel, the first winding portion of the first type of fan-out line and the second winding portion of the second type of fan-out line overlap on the orthographic projection portion of the plane where the display panel is located.

13. The display panel according to any one of claims 1 to 12, wherein, The resistance of the first type of fan-out line is equal to the resistance of the second type of fan-out line.

14. The display panel according to any one of claims 1 to 13, wherein, The length of the first type of fan-out line is equal to the length of the second type of fan-out line.

15. The display panel according to any one of claims 1 to 14, wherein, Among the multiple first-type fan-out lines arranged on the same layer, the spacing between two adjacent first winding portions is a set value.

16. The display panel according to claim 15, wherein, Among the multiple first-type fan-out lines arranged on the same layer, the minimum spacing between two adjacent first winding portions is greater than or equal to 3μm.

17. A display device, comprising: The display panel as described in any one of claims 1 to 16; Display chip; The display chip is bonded to multiple fan-out lines in the display panel.

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