Array substrate, flexible display panel and display device

Abstract

The present application provides an array substrate, a flexible display panel and a display device, wherein the array substrate comprises: a crimping area; at least one row of crimping terminals is arranged in the crimping area, and the minimum spacing of the crimping terminals is G P ; When #imgabs0#, the extension direction of the crimping terminal is set according to the first parameter and the second parameter of the array substrate; wherein, G A is the minimum spacing of ACF test pads, G C is the etching accuracy of COF terminal, S C is the alignment accuracy of the crimping machine, b is the second parameter of the array substrate, the second parameter of the array substrate refers to the maximum value of the expansion and contraction rate, and the first parameter of the array substrate refers to the minimum value of the expansion and contraction rate. In the array substrate, flexible display panel and display device provided in the present application, the extension direction of the crimping terminal is set according to the minimum spacing of the crimping terminal and the expansion and contraction rate of the array substrate to overcome the problem of abnormal expansion and contraction, ensure the correct alignment of the crimping terminal of the array substrate and the COF terminal, and thus improve the crimping yield.

Description

Technical Field

[0001] The present application relates to the field of flexible display technology, and in particular to an array substrate, a flexible display panel and a display device. Background Art

[0002] Flexible display devices are bendable and deformable display devices made of flexible materials. Due to their excellent display properties such as flexibility and lightness, flexible display devices can be used in many fields such as wearable devices, mobile devices, augmented reality and virtual technology equipment, and are considered to be the mainstream in the future display field.

[0003] The existing module manufacturing process of the flexible display device includes a bonding process, through which the terminals on the array substrate are bonded together with the terminals of a chip on film (COF).

[0004] However, in the actual manufacturing process, it is found that the crimping terminals of the array substrate have batch-specific expansion and contraction anomalies, that is, in the crimping area (i.e., the bonding area) of the array substrate, the terminal spacing on one side is zero relative to the COF, while the terminal spacing on the other side often exceeds the minimum required spacing relative to the COF. In this way, when the COF is crimped, the terminals of the COF and the terminals of the array substrate may be misaligned, resulting in poor crimping of the COF and the array substrate.

[0005] Therefore, how to overcome the abnormal expansion and contraction and improve the crimping yield of COF and array substrate has become a technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0006] In view of this, the present application provides an array substrate, a flexible display panel and a display device to solve the problem of misalignment of terminals during crimping caused by abnormal expansion and contraction of flexible display screens in the prior art.

[0007] In order to solve the above technical problems, the present invention provides an array substrate, the array substrate comprising: a pressing area;

[0008] At least one row of crimping terminals is arranged in the crimping area, and the minimum spacing of the crimping terminals is G P ;

[0009] when When the extension direction of the crimping terminal is set according to the first parameter and the second parameter of the array substrate;

[0010] Among them, G A is the minimum spacing of ACF test pads, G C is the etching accuracy of COF terminal, S Cis the alignment accuracy of the crimping machine, b is the second parameter of the array substrate, the second parameter of the array substrate refers to the maximum value of the expansion and contraction rate, and the first parameter of the array substrate refers to the minimum value of the expansion and contraction rate.

[0011] Optionally, in the array substrate, the crimping area has a center line, the center line is perpendicular to the arrangement direction of the crimping terminals, the at least one row of crimping terminals are symmetrically arranged on both sides of the center line, and the areas of each crimping terminal in the at least one row of crimping terminals are equal.

[0012] Optionally, in the array substrate, when the minimum spacing of the crimping terminals is When the crimping terminal is extended in a direction parallel to the midline.

[0013] Optionally, in the array substrate, the crimping area is divided into a first side area and a second side area in sequence along the arrangement direction of the crimping terminals, the crimping terminals in the first side area and the crimping terminals in the second side area are symmetrically arranged about the center line, and the crimping terminals in the first side area and the second side area both include a first section and a second section connected in sequence, an extension direction of the first section is set according to the first parameter, and an extension direction of the second section is set according to the second parameter.

[0014] Optionally, in the array substrate, the crimping area is divided into a first side area, a middle area, and a second side area in sequence along the arrangement direction of the crimping terminals, the crimping terminals in the first side area and the crimping terminals in the second side area are symmetrically arranged about the midline, and the crimping terminals in the first side area and the second side area both include a first section and a second section connected in sequence, an extension direction of the first section is set according to the first parameter, and an extension direction of the second section is set according to the second parameter;

[0015] The extension direction of the crimping terminals in the middle zone is parallel to the median line, and the crimping terminals in the middle zone are arranged equidistantly, and the minimum spacing between the crimping terminals in the first side zone and the second side zone is greater than or equal to the spacing between the crimping terminals in the middle zone.

[0016] Optionally, in the array substrate, the spacing between the crimping terminals in the first side area and the second side area gradually changes along a direction parallel to the midline;

[0017] The ratio of the minimum spacing to the maximum spacing of the crimping terminals in the first side area and the second side area is set according to the first parameter and the second parameter.

[0018] Optionally, in the array substrate, center lines of the first section and the second section are both straight line segments or arc segments.

[0019] Optionally, in the array substrate, the center line of the first segment is a straight line segment, and the center line of the second segment is an arc segment; or

[0020] The center line of the first section is an arc segment, and the center line of the second section is a straight line segment.

[0021] Correspondingly, the present invention further provides a flexible display panel, wherein the flexible display panel comprises the array substrate as described above.

[0022] Correspondingly, the present invention further provides a display device, which includes the flexible display panel as described above.

[0023] In the array substrate, flexible display panel and display device provided by the present invention, the extension direction of the crimping terminal is set according to the minimum spacing of the crimping terminal and the expansion and contraction rate of the array substrate to overcome the abnormal expansion and contraction problem and ensure the correct alignment of the crimping terminal of the array substrate with the COF terminal, thereby improving the crimping yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic structural diagram of a pressing area of ​​an array substrate according to a first embodiment of the present invention is shown;

[0026] Figure 2 A schematic diagram of the structure of the crimping terminal and the COF in the prior art is shown;

[0027] Figure 3 A schematic structural diagram of a pressing area of ​​an array substrate according to a second embodiment of the present invention is shown;

[0028] Figure 4 A schematic structural diagram of a crimping area of ​​an array substrate according to a third embodiment of the present invention is shown. DETAILED DESCRIPTION

[0029] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0030] [Example 1]

[0031] Please refer to Figure 1 , which is a schematic diagram of the structure of the crimping area of ​​the array substrate of the first embodiment of the present invention. Figure 1 As shown, the array substrate comprises: a crimping area 10; at least one row of crimping terminals 11 is arranged in the crimping area 10, and the minimum spacing of the crimping terminals 11 is G P ;when When G is used, the extension direction of the crimping terminal 11 is set according to the first parameter and the second parameter of the array substrate; wherein G A is the minimum spacing of ACF test pads, G C is the etching accuracy of COF terminal, S C is the alignment accuracy of the crimping machine, b is the second parameter of the array substrate, the second parameter of the array substrate refers to the maximum value of the expansion and contraction rate, and the first parameter of the array substrate refers to the minimum value of the expansion and contraction rate.

[0032] Specifically, the array substrate includes a display area (not shown in the figure) and a crimping area 10, the display area includes a plurality of display devices for performing a display function, and a row of crimping terminals 11 are provided in the crimping area 10, each crimping terminal 11 is connected to the display device in the display area through a corresponding signal connection line. After the crimping terminal 11 is crimped (bonded) with the terminal of the COF, the control signal on the COF can be transmitted to the display area through the crimping terminal 11, and the corresponding signal instruction is executed.

[0033] Please refer to Figure 2 , which is a schematic diagram of the structure of the crimping terminal and COF in the prior art. Figure 2 As shown, in the conventional design, the crimping terminal 11 of the array substrate is generally a rectangular structure, and the structure and size of the terminal 12 of the COF are substantially the same as those of the crimping terminal 11. After crimping, the crimping terminal 11 and the terminal 12 of the COF are required to have a certain contact width and contact area. Among them, the length of the crimping terminal 11 is L P , the width of the crimping terminal 11 is W P , the minimum contact area between the crimping terminal 11 and the terminal 12 of the COF is S1, and the minimum contact width is W1. The calculation formula of the minimum contact area S1 is as follows:

[0034]

[0035] Right now:

[0036]

[0037] Among them, G A , G C and S C are all constants, constant G A The size of G is related to the material properties of anisotropic conductive paste (ACF), which refers to the minimum spacing of ACF test PAD. C The size of S is related to the material properties of COF and refers to the etching accuracy of COF terminals. C The size is related to the accuracy of the crimping machine, which refers to the positioning accuracy of the crimping machine.

[0038] In the crimping area, the distribution width of a single crimping terminal 11 is G P +W P Among them, G P is the minimum spacing of crimping terminals 11, W P is the width of the crimping terminal 11. The total length of the crimping area is N×(G P +W P ). Wherein, N represents the number of crimping terminals 11 in the crimping area.

[0039] Before and after crimping, the total length of the crimping area will change. Before crimping (Array process), the total length of the crimping area is L1. After crimping (Module process), the total length of the crimping area is L2. The rate of change of the total length of crimping is the expansion and contraction rate. The calculation formula of the expansion and contraction rate Δ is as follows:

[0040] Δ=(L2-L1)÷L1 (Formula 3);

[0041] The inventors have found that the crimping terminals of the array substrate have abnormal batch expansion and contraction, which easily causes the crimping terminals to be misaligned during crimping. Therefore, the crimping terminals need to be redesigned.

[0042] In this embodiment, the design of the crimping terminal takes into account the expansion and contraction of the material of the array substrate. To this end, the expansion and contraction rate of the array substrate is first determined through experiments. The test process of the expansion and contraction rate of the array substrate includes:

[0043] First, prepare a test sample; then, measure the total crimping length of the test sample (i.e., the total length L1 of the crimping area 10 before crimping); then, place the test sample in a constant temperature and humidity environment (temperature is 23±3°C, humidity is 59±6%RH) for 21 days; thereafter, perform a module crimping process, and measure the total crimping length of the test sample again after the crimping process is completed (i.e., the total length L2 of the crimping area 10 after crimping); finally, calculate the change rate of the total crimping length to obtain the expansion and contraction rate Δ.

[0044] In this embodiment, the array substrate is a flexible transparent substrate, and the flexible substrate used is polyimide, referred to as PI in English. Accordingly, the substrate of the test sample is PI, and low-temperature polycrystalline silicon thin-film transistors (LTPS-TFT), organic electroluminescent devices (OLED) and flexible encapsulation layers (TFE) are sequentially formed on the substrate, and a protective film with weak adhesion (tearing force ≤ 1gf / 25mm) is attached to the test sample.

[0045] In this embodiment, the first parameter (ie, the smaller value of the expansion and contraction rate) a of the array substrate is 0.07%, and the second parameter (ie, the minimum value of the expansion and contraction rate) b is 0.336%.

[0046] The minimum expansion and contraction rate a and the minimum expansion and contraction rate b of the array substrate are obtained through multiple expansion and contraction rate tests. In multiple expansion and contraction rate tests, the maximum expansion and contraction rate obtained is the minimum expansion and contraction rate b, and the minimum expansion and contraction rate obtained is the minimum expansion and contraction rate a. The minimum expansion and contraction rate b is also called the expansion and contraction limit value. The minimum expansion and contraction rate b is 0.336%, which means that the expansion and contraction rate Δ of the array substrate is ≤ 0.336%.

[0047] Please continue to refer to Figure 2 When the expansion and contraction rate of the array substrate Δ≤0.336%, the arrangement design of the traditional crimping terminals is generally required to meet the following conditions:

[0048] (W P -X)*L P ≥S1 and G P -X≥G A

[0049]

[0050] Here, X refers to the alignment deviation between the crimping terminal 11 and the terminal 12 of the COF, and L1 is the total length of the crimping area 10 before crimping.

[0051] The inventors have considered the expansion and contraction of materials and distinguished the minimum spacing G of the crimping terminals 11 when designing the crimping terminals. P Is it better than When the minimum spacing G of the crimped terminal 11 is P Less than In order to avoid the problem of crimping misalignment caused by material expansion and contraction, the extension direction of the crimping terminal 11 is required to be set according to the smaller value a of the expansion and contraction rate and the minimum value b of the expansion and contraction rate. P Greater than or equal to Even if extreme shrinkage occurs, the crimping alignment requirements can be met, so there is no need for expansion and shrinkage compensation and the traditional design can be used.

[0052] In this embodiment, the minimum spacing G between the crimping terminals 11 in the crimping area 10 is P Average ratio Therefore, all the crimping terminals 11 in the crimping area 10 must be compensated for expansion and contraction.

[0053] Please continue to refer to Figure 1 Each crimping terminal 11 includes a first section 11a and a second section 11b connected in sequence, the extension direction of the first section 11a is set according to the minimum value a of the expansion and contraction rate of the array substrate, and the extension direction of the second section 11b is set according to the minimum value b of the expansion and contraction rate of the array substrate.

[0054] In this embodiment, the center lines of the first section 11a and the second section 11b are both straight line segments, and the center line of the first section 11a and the center line of the second section 11b are combined into a broken line, that is, the center line of the crimping terminal 11 is a broken line, and the angle between the extension direction of the first section 11a and the arrangement direction of the crimping terminal 11 is set according to the minimum value a of the expansion and contraction rate, and the angle between the extension direction of the second section 11b and the arrangement direction of the crimping terminal 11 is set according to the minimum value b of the expansion and contraction rate.

[0055] Please continue to refer to Figure 1 The crimping area 10 has a median line (shown by a vertical dotted line in the figure), which is perpendicular to the arrangement direction. In the arrangement direction of the crimping terminals 11, the crimping area 10 is divided into a first side area A and a second side area C in sequence. The terminal spacing between the first side area A and the second side area C gradually changes along the direction parallel to the median line, that is, the distance between any two adjacent crimping terminals 11 is not a fixed value, but gradually changes from small to large or from large to small, and the minimum spacing is G P , the maximum spacing is G P '.

[0056] The angle between the extension direction of the crimping terminal 11 and the arrangement direction of the crimping terminal 11 is greater than 0° and less than 90°, and the minimum spacing G of the crimping terminal 11 is P With the maximum spacing G P ' ratio (G P / G P ') is a certain value, which is related to the smaller value a of the expansion / contraction rate and the minimum value b of the expansion / contraction rate.

[0057] In this embodiment, the spacing of the crimping terminals 11 is designed to be narrow at the top and wide at the bottom. In other embodiments, the spacing of the crimping terminals 11 can also be designed to be narrow at the bottom and wide at the top, as long as the spacing of the crimping terminals 11 and the terminal spacing of the COF are designed in the same way.

[0058] Compared with the traditional design, the space occupied by each crimping terminal 11 in the first side area A and the second side area C is relatively large, so the expansion and contraction of the material can be compensated to avoid the problem of misalignment with the terminals of the COF due to abnormal batch expansion and contraction, thereby improving the crimping yield of the COF and the array substrate.

[0059] Preferably, the crimping terminals 11 of the first side area A and the second side area C are symmetrically arranged about the midline. Thus, among the crimping terminals 11 in the first side area A and the second side area C, the extension directions of two crimping terminals 11 that are equal in distance from the midline are symmetrically arranged about the midline, so that the two crimping terminals 11 occupy the same space.

[0060] Preferably, the areas of the crimping terminals 11 in the first side area A and the second side area C are equal. In this way, the impedance after crimping is equal, and the difference in current or voltage between the crimping terminals is avoided, thereby preventing adverse effects on the display effect.

[0061] In other embodiments, the array substrate may also be made of other flexible substrates (such as PEN, PET, etc.). Since the expansion and contraction rate of the array substrate is mainly related to the material properties of the array substrate, the expansion and contraction rate of the array substrate will be different if different materials are used. Accordingly, the extension directions of the first section and the second section in the crimping terminal will also change.

[0062] [Example 2]

[0063] Please refer to Figure 3 , which is a schematic diagram of the structure of the pressing area of ​​the array substrate of the second embodiment of the present invention. Figure 3 As shown, the array substrate includes: a crimping area 20; at least one row of crimping terminals 11 is arranged in the crimping area 20, and the minimum spacing of the crimping terminals 11 is G P ,when When G is used, the extension direction of the crimping terminal 11 is set according to the first parameter and the second parameter of the array substrate; wherein G A is the minimum spacing of ACF test pads, G C is the etching accuracy of COF terminal, S C is the alignment accuracy of the crimping machine, b is the second parameter of the array substrate, the second parameter of the array substrate refers to the maximum value of the expansion and contraction rate, and the first parameter of the array substrate refers to the minimum value of the expansion and contraction rate.

[0064] Specifically, the design of the crimping terminal 11 takes into account the expansion and contraction of the material of the array substrate.

[0065] In this embodiment, the smaller value a of the expansion and contraction rate of the array substrate is 0.07%, the minimum value b of the expansion and contraction rate is 0.336%, and the minimum spacing G of the crimping terminals 11 on the left and right sides of the crimping area 20 is P Average requirement ratio The minimum spacing G of the crimping terminal 11 in the middle position is small. P Average requirement ratio Therefore, the crimping terminals 11 on the left and right sides need to be compensated for expansion and contraction, and the crimping terminal 11 in the middle position does not need to be compensated for expansion and contraction, and the traditional design can be adopted.

[0066] like Figure 3 As shown, the crimping area 20 has a midline (shown by the vertical dotted line in the figure), and the midline is perpendicular to the arrangement direction of the crimping terminals 11. In the arrangement direction of the crimping terminals 11, the crimping area 20 is divided into a first side area A, a middle area B, and a second side area C in sequence. The crimping terminals 11 in the middle area B are equally spaced, and their extension directions are parallel to the midline (i.e., perpendicular to the arrangement direction of the crimping terminals 11). The crimping terminals 11 in the first side area A and the second side area C are symmetrically arranged about the midline, and the terminal spacings in the first side area A and the second side area C gradually change along the direction parallel to the midline. Among them, the minimum spacing G of the crimping terminals 11 in the first side area A and the second side area C is equal to the minimum spacing G of the crimping terminals 11 in the first side area A and the second side area C. P The terminal spacing is required to be greater than or equal to the terminal spacing in the middle area B.

[0067] Please continue to refer to Figure 3 Each crimping terminal 11 in the first side area A and the second side area C includes a first section 11a and a second section 11b connected in sequence, the extension direction of the first section 11a is set according to the smaller value a of the expansion and contraction rate, the extension direction of the second section 11b is set according to the minimum value b of the expansion and contraction rate, and the minimum spacing G of the crimping terminal 11 is P With the maximum spacing G P ' is a certain value, which is related to the smaller value a of the expansion and contraction rate and the minimum value b of the expansion and contraction rate.

[0068] In this embodiment, the center lines of the first section 11a and the second section 11b are also straight line segments, and the center lines of each crimping terminal 11 in the first side area A and the second side area C are both broken lines.

[0069] In this embodiment, the crimping area 20 is divided into a middle area and two side areas. The terminal spacing in the middle area adopts a traditional design (that is, the crimping terminals are all arranged in parallel and equidistantly), and the terminal spacing in the two side areas adopts a top-narrow and bottom-wide design or a bottom-narrow and top-wide design.

[0070] From the arrangement direction of the crimping terminals 11, the space occupied by each crimping terminal 11 in the first side area A and the second side area C is relatively large, and the space occupied by each crimping terminal 11 in the middle area B is relatively small. Since the space occupied by the crimping terminals 11 on the left and right sides is relatively large, the expansion and contraction of the material can be compensated to avoid the problem of misalignment with the terminals of the COF due to abnormal batch expansion and contraction, thereby improving the crimping yield of the COF and the array substrate.

[0071] Preferably, the areas of the crimping terminals 11 in the first side area A, the middle area B and the second side area C are equal. In this way, the impedance after crimping is equal, and the difference in current or voltage between the crimping terminals is avoided, which will adversely affect the display effect.

[0072] It should be noted that, in the array substrate provided in this embodiment, the cross-sectional shape of the crimping terminal 11 in the middle area B can be a rectangle or other shapes (for example, similar to the shapes of the crimping terminals in the first side area A and the second side area C), and the shapes of the crimping terminals 11 in the middle area B can be set to be the same or different, which is not limited here.

[0073] It should be noted that, in the array substrate provided in this embodiment, Figure 3 The crimping area 20 is divided into a first side area A, a middle area B and a second side area C in order from left to right for explanation. Of course, the crimping area 20 can also be divided into a first side area, a middle area and a second side area in order from right to left, which is not limited here.

[0074] It should be noted that when the minimum spacing G of the crimping terminal 11 P Greater than or equal to When the expansion and contraction is induced, a traditional design may be used without compensating for the expansion and contraction, or a new design may be used to compensate for the expansion and contraction according to the smaller expansion and contraction rate value a and the minimum expansion and contraction rate value b, which is not limited here.

[0075] [Example 3]

[0076] Please refer to Figure 4 , which is a schematic diagram of the structure of the pressing area of ​​the array substrate of the third embodiment of the present invention. Figure 4 As shown, the array substrate includes: a crimping area 30; at least one row of crimping terminals 11 is arranged in the crimping area 30, and the minimum spacing of the crimping terminals 11 is G P ,when When G is used, the extension direction of the crimping terminal 11 is set according to the first parameter and the second parameter of the array substrate; wherein G A is the minimum spacing of ACF test pads, G Cis the etching accuracy of COF terminal, S C is the alignment accuracy of the crimping machine, b is the second parameter of the array substrate, the second parameter of the array substrate refers to the maximum value of the expansion and contraction rate, and the first parameter of the array substrate refers to the minimum value of the expansion and contraction rate.

[0077] Specifically, the design of the crimping terminal 11 takes into account the expansion and contraction of the material of the array substrate.

[0078] In this embodiment, the smaller value a of the expansion and contraction rate of the array substrate is 0.07%, the minimum value b of the expansion and contraction rate is 0.336%, and the minimum spacing G between the crimping terminals 11 on the left and right sides of the crimping area 30 is P Average requirement ratio The minimum spacing G of the crimping terminal 11 in the middle position is small. P Average requirement ratio Therefore, the crimping terminals 11 on the left and right sides need to be compensated for expansion and contraction, and the crimping terminal 11 in the middle position does not need to be compensated for expansion and contraction, and the traditional design is directly adopted.

[0079] like Figure 4 As shown, the crimping area 30 has a center line (shown by the vertical dotted line in the figure), and the center line is perpendicular to the arrangement direction of the crimping terminals 11. In the arrangement direction of the crimping terminals 11, the crimping area 30 is divided into a first side area A, a middle area B and a second side area C in sequence. The crimping terminals 11 in the middle area B are equidistant and their extension directions are parallel to the center line (i.e., perpendicular to the arrangement direction of the crimping terminals 11). The crimping terminals 11 in the first side area A and the second side area C are symmetrically arranged about the center line, and the terminal spacings in the first side area A and the second side area C gradually change along a direction parallel to the center line.

[0080] In this embodiment, the crimping area 30 is divided into a middle area and two side areas. The terminal spacing in the middle area adopts a traditional design (that is, the crimping terminals are all arranged in parallel and equidistantly), and the terminal spacing in the two side areas adopts a top-narrow and bottom-wide design or a bottom-narrow and top-wide design.

[0081] The difference between this embodiment and the second embodiment is that the center lines of the crimping terminals 11 of the first side area A and the second side area C are both arc lines, while in the second embodiment, the center lines of the crimping terminals 11 of the first side area A and the second side area C are both broken lines.

[0082] It should be noted that the shape, quantity and arrangement of the crimping terminals 11 are only examples, not limitations, and those skilled in the art can set the shape, quantity and arrangement of the crimping terminals 11 according to actual needs. For example, the center lines of the first section 11a and the second section 11b of the crimping terminal 11 are both arc segments, or the center line of the first section 11a is a straight line segment, and the center line of the second section 11b is an arc segment; or the center line of the first section 11a is an arc segment, and the center line of the second section 11b is a straight line segment.

[0083] The above drawings are only schematic illustrations of the crimping area of ​​the array substrate provided by the present invention. For the sake of clarity, the shapes and numbers of components in the above drawings are simplified and some components are omitted. Those skilled in the art may make changes according to actual needs. These changes are within the scope of protection of the present invention and will not be described in detail here.

[0084] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0085] In summary, the array substrate, flexible display panel and display device provided by the present invention set the extension direction of the crimping terminals according to the minimum spacing of the crimping terminals and the expansion and contraction rate of the array substrate to overcome the abnormal expansion and contraction problem and ensure the correct alignment of the crimping terminals of the array substrate and the COF terminals, thereby improving the crimping yield.

[0086] The above content is a further detailed description of the present application in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. An array substrate, characterized in that: include: Crimp area; At least one row of crimping terminals is arranged in the crimping area, and the minimum spacing of the crimping terminals is G P ; when When the extension direction of the crimping terminal is set according to the first parameter and the second parameter of the array substrate; Among them, G A is the minimum spacing of ACF test pads, G C is the etching accuracy of COF terminal, S C is the alignment accuracy of the crimping machine, b is the second parameter of the array substrate, the second parameter of the array substrate refers to the maximum value of the expansion and contraction rate, and the first parameter of the array substrate refers to the minimum value of the expansion and contraction rate.

2. The array substrate according to claim 1, characterized in that: The crimping area has a midline, which is perpendicular to the arrangement direction of the crimping terminals. The at least one row of crimping terminals are symmetrically arranged on both sides of the midline, and the areas of the crimping terminals in the at least one row are equal.

3. The array substrate according to claim 2, characterized in that: When the minimum spacing of the crimp terminals When the crimping terminal is extended in a direction parallel to the midline.

4. The array substrate according to claim 2, characterized in that: The crimping area is divided into a first side zone and a second side zone in sequence along the arrangement direction of the crimping terminals, the crimping terminals in the first side zone and the crimping terminals in the second side zone are symmetrically arranged about the midline, and the crimping terminals in the first side zone and the second side zone both include a first section and a second section connected in sequence, an extension direction of the first section is set according to the first parameter, and an extension direction of the second section is set according to the second parameter.

5. The array substrate according to claim 2, characterized in that: The crimping area is divided into a first side area, a middle area and a second side area in sequence along the arrangement direction of the crimping terminals, the crimping terminals in the first side area and the crimping terminals in the second side area are symmetrically arranged about the midline, and the crimping terminals in the first side area and the second side area both include a first section and a second section connected in sequence, the extension direction of the first section is set according to the first parameter, and the extension direction of the second section is set according to the second parameter; The extension direction of the crimping terminals in the middle zone is parallel to the median line, and the crimping terminals in the middle zone are arranged equidistantly, and the minimum spacing between the crimping terminals in the first side zone and the second side zone is greater than or equal to the spacing between the crimping terminals in the middle zone.

6. The array substrate according to claim 4 or 5, characterized in that: The spacings between the crimping terminals in the first side area and the second side area gradually change along a direction parallel to the midline; The ratio of the minimum spacing to the maximum spacing of the crimping terminals in the first side area and the second side area is set according to the first parameter and the second parameter.

7. The array substrate according to claim 4 or 5, characterized in that: The center lines of the first section and the second section are both straight line segments or arc segments.

8. The array substrate according to claim 4 or 5, characterized in that: The center line of the first segment is a straight line segment, and the center line of the second segment is an arc segment; or The center line of the first section is an arc segment, and the center line of the second section is a straight line segment.

9. A flexible display panel, characterized in that: include: An array substrate as claimed in any one of claims 1 to 8.

10. A display device, characterized in that: include: The flexible display panel as claimed in claim 9.

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