Display panel, display device and alignment judgment method

Abstract

The application relates to a display panel, a display device and a positioning judgment method. The display panel comprises a display screen, a first binding part, a first mark and a plurality of first connecting pads, the first connecting pads and the first mark are connected to one side of the first binding part along a thickness direction; a flexible circuit board comprises a second binding part, a second mark and a plurality of second connecting pads, the second connecting pads and the second mark are connected to one side of the second binding part along the thickness direction, the plurality of first connecting pads and the plurality of second connecting pads are correspondingly arranged, the first connecting pad is connected to the corresponding second connecting pad, the first mark is connected to the second mark, and the positioning deviation between the first connecting pad and the second connecting pad along a second direction is less than or equal to a preset deviation. Therefore, the display panel, the display device and the positioning judgment method provided by the application can improve the binding stability between the display screen and the flexible circuit board.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel, display device, and alignment determination method. Background Technology

[0002] Organic Light Emitting Diode (OLED) display technology is considered the most promising next-generation flat panel display technology. Compared to liquid crystal displays, OLED technology offers advantages such as low energy consumption, low cost, self-emissiveness, wide viewing angle, and fast response time. The display panel consists of a display screen and a flexible circuit board, which are bonded together. However, the bonding stability between the display screen and the flexible circuit board is relatively poor. Summary of the Invention

[0003] Therefore, it is necessary to provide a display panel, a display device, and an alignment determination method to improve the bonding stability between the display screen and the flexible circuit board.

[0004] In a first aspect, embodiments of this application provide a display panel, including:

[0005] The display screen includes a first bonding portion, a first mark, and a plurality of first connecting pads, wherein the first connecting pads and the first mark are all connected to one side of the first bonding portion along the thickness direction;

[0006] A flexible circuit board includes a second bonding portion, a second mark, and a plurality of second connecting pads. The second connecting pads and the second mark are both connected to one side of the second bonding portion along the thickness direction. The plurality of first connecting pads are correspondingly arranged with the plurality of second connecting pads. The first connecting pads are connected to the corresponding second connecting pads. The first mark and the second mark are connected.

[0007] Wherein, the extension directions of the first connecting pad and the second connecting pad intersect the first direction at an angle θ with the first direction; the distance A between the center of the first mark along the second direction and the center of the second mark along the second direction; the first connecting pad has a first center line, the extension direction of the first center line being parallel to the extension direction of the first connecting pad; the second connecting pad has a second center line, the extension direction of the second center line being parallel to the extension direction of the second connecting pad; the tolerance of the maximum distance along the first direction between the two outermost first center lines of the plurality of first connecting pads is T1; the tolerance of the maximum distance along the first direction between the two outermost second center lines of the plurality of second connecting pads is T2; any two of the first direction, the second direction, and the display thickness direction are perpendicular; and A, θ, T1, and T2 satisfy the following formula: .

[0008] The display panel provided in this application embodiment controls the alignment deviation between the first connecting pad 131 and the second connecting pad 132 along the second direction Y to be less than or equal to a preset deviation. This can avoid the alignment failure between the first connecting pad and the second connecting pad along the second direction caused by tolerances T1 and T2, resulting in a smaller alignment deviation between the first connecting pad and the second connecting pad along the second direction and a larger connection area between the first connecting pad and the second connecting pad, which is beneficial to improving the bonding stability.

[0009] In one embodiment, one of the first mark and the second mark includes a first extension, a second extension and a third extension connected together. The first extension and the third extension both extend along a second direction, and the second extension extends along a first direction. The first extension and the third extension both include a first sub-part, a second sub-part and a third sub-part connected sequentially along the second direction. The two ends of the second extension are respectively connected to the second sub-part of the first extension and the second sub-part of the third extension.

[0010] Preferably, the first connecting pad and the first mark are arranged along a first direction;

[0011] Preferably, at least one of the first sub-parts and the third sub-parts has a dimension along the second direction of [missing value]. ;

[0012] Preferably, the dimension of the first connecting pad along the extending direction is L1, and the dimension of the second connecting pad along the extending direction is L2, wherein L1 and L2 satisfy the following formula: L1 < L2;

[0013] Preferably, L1, L2, θ, T1, and T2 satisfy the following formula: ;

[0014] Preferably, the maximum distance along the first direction between the two outermost first center lines of the plurality of first connecting pads is D1, and the ratio of T1 to D1 is in the range of 0.02-0.05;

[0015] Preferably, the maximum distance along the first direction between the two outermost second center lines of the plurality of second connecting pads is D2, and the ratio of T2 to D2 is in the range of 0.02-0.05;

[0016] Preferably, the dimension of the first mark along the first direction is equal to the dimension of the second mark along the first direction;

[0017] Preferably, the dimension of the first mark along the second direction is equal to the dimension of the second mark along the second direction.

[0018] In one embodiment, the distance between the center of the first mark along the first direction and the center of the second mark along the first direction is B, where B, T1, and T2 satisfy the following formula: ;

[0019] Preferably, the other of the first mark and the second mark includes a connected fourth extension, a fifth extension and a sixth extension, both of the fourth extension and the sixth extension extending along a first direction, and the fifth extension extending along a second direction. Both the fourth extension and the sixth extension include a fourth sub-part, a fifth sub-part and a sixth sub-part connected sequentially along the first direction, and the two ends of the fifth extension are respectively connected to the fifth sub-part of the fourth extension and the fifth sub-part of the sixth extension.

[0020] Preferably, at least one of the first extension segment and the third extension segment has a dimension along the first direction equal to the dimension of the fifth extension segment along the first direction;

[0021] Preferably, at least one of the fourth and sixth extensions has a dimension along the second direction equal to the dimension of the second extension along the second direction;

[0022] Preferably, at least one of the fourth and sixth sub-parts has a dimension along the first direction of [missing value]. .

[0023] In one embodiment, the binding area includes a first sub-binding area and a second sub-binding area, the second sub-binding area is disposed on both sides of the first sub-binding area along a first direction, a first connecting pad and a second connecting pad are disposed in the first sub-binding area, and a first mark and a second mark are disposed in the second sub-binding area;

[0024] Preferably, the bonding area includes a third sub-bonding area, which is located on the side of the second sub-bonding area away from the first sub-bonding area; the display screen includes a third connecting pad located in the third sub-bonding area; the flexible circuit board includes a fourth connecting pad located in the third sub-bonding area; the third connecting pad is connected to the side of the first bonding portion facing the first connecting pad; the fourth connecting pad is connected between the third connecting pad and the second bonding portion; and the third connecting pad and the fourth connecting pad are configured as detection pads.

[0025] Preferably, the first and second connecting pads are configured as signal transmission pads;

[0026] Preferably, at least one of the third and fourth connecting pads extends along the second direction;

[0027] Preferably, the dimension of either the third connecting pad or the fourth connecting pad along the first direction is greater than the dimension of either the first connecting pad or the second connecting pad along the first direction.

[0028] Preferably, the number of either the third or fourth connecting pad is less than the number of either the first or second connecting pad.

[0029] Preferably, the dimension of either the third or fourth connecting pad in the extension direction is smaller than the dimension of either the first or second connecting pad in the extension direction.

[0030] In one embodiment, the first sub-binding area includes a first sub-area and a second sub-area, the first sub-area and the second sub-area are arranged along a first direction, the first connecting pad includes a first end and a second end along the extending direction, the second end of the first connecting pad located in the first sub-area is inclined relative to the first end in a direction away from the second sub-area, and the second end of the first connecting pad located in the second sub-area is inclined relative to the first end in a direction away from the first sub-area.

[0031] Preferably, the first connecting pad located in the first sub-region and the first connecting pad located in the second sub-region are symmetrically arranged;

[0032] Preferably, the second connecting pad includes a third end and a fourth end along the extending direction, the fourth end of the second connecting pad located in the first sub-region is inclined relative to the third end in a direction away from the second sub-region, and the fourth end of the second connecting pad located in the second sub-region is inclined relative to the third end in a direction away from the first sub-region.

[0033] Preferably, the second connecting pad located in the first sub-region and the second connecting pad located in the second sub-region are symmetrically arranged.

[0034] In one embodiment, the first sub-bonding area includes a third sub-area located between the first sub-area and the second sub-area. The display screen includes a fifth connecting pad disposed in the third sub-area. The flexible circuit board includes a sixth connecting pad disposed in the third sub-area. The fifth connecting pad is connected to the side of the first bonding portion facing the first connecting pad. The sixth connecting pad is connected between the fifth connecting pad and the second bonding portion. At least one of the fifth connecting pad and the sixth connecting pad extends along a second direction.

[0035] In one embodiment, the second sub-bonding area includes a fourth sub-area and a fifth sub-area, which are arranged along a second direction. The first mark and the second mark are both located in the fourth sub-area. The display screen includes a third mark located in the fifth sub-area. The flexible circuit board includes a fourth mark located in the fifth sub-area. The third mark is connected to the side of the first bonding portion facing the first connecting pad. The fourth mark is connected between the third mark and the second bonding portion. The extension direction of the third mark is parallel to the extension direction of the first connecting pad, and the extension direction of the fourth mark is parallel to the extension direction of the second connecting pad.

[0036] Secondly, embodiments of this application provide a display device including the display panel described in the first aspect.

[0037] Secondly, embodiments of this application provide an alignment determination method, including:

[0038] A display panel is provided; the display panel includes a display screen and a flexible circuit board. The display screen includes a first bonding portion, a first mark, and a plurality of first connecting pads. The first connecting pads and the first mark are both connected to one side of the first bonding portion along the thickness direction. The flexible circuit board includes a second bonding portion, a second mark, and a plurality of second connecting pads. The second connecting pads and the second mark are both connected to one side of the second bonding portion along the thickness direction. The plurality of first connecting pads and the plurality of second connecting pads are correspondingly arranged, and the first connecting pads are connected to their corresponding second connecting pads. The first mark and the second mark are connected. The extending directions of the first connecting pads and the second connecting pads intersect at an angle with a first direction and are perpendicular to the first direction. The included angle is θ, the distance between the center of the first mark along the second direction and the center of the second mark along the second direction is A, the first connecting pad has a first center line, the extension direction of the first center line is parallel to the extension direction of the first connecting pad, the second connecting pad has a second center line, the extension direction of the second center line is parallel to the extension direction of the second connecting pad, the tolerance of the maximum distance between the two outermost first center lines of the plurality of first connecting pads along the first direction is T1, the tolerance of the maximum distance between the two outermost second center lines of the plurality of second connecting pads along the first direction is T2, and any two of the first direction, the second direction and the thickness direction of the display screen are perpendicular;

[0039] Obtain the graphics of the first and second markers;

[0040] Based on the obtained graphs of the first and second marks, determine whether A, θ, T1, and T2 satisfy the formula. If yes, then the first connecting pad and the second connecting pad are successfully aligned along the second direction; if no, then the first connecting pad and the second connecting pad are not aligned along the second direction.

[0041] In one embodiment, the distance between the center of the first mark along the first direction and the center of the second mark along the first direction is B;

[0042] After obtaining the graphics of the first and second markers, the following is included:

[0043] Based on the obtained graphs of the first and second marks, determine whether B, T1, and T2 satisfy the formula. If yes, then the first connecting pad and the second connecting pad are successfully aligned along the first direction; if no, then the alignment between the first connecting pad and the second connecting pad along the first direction fails. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of this application, the drawings used in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a top view of the display panel provided in an embodiment of this application.

[0046] Figure 2 This is a top view of the display screen of the binding area provided in an embodiment of this application.

[0047] Figure 3 A top view of the flexible circuit board for the bonding area provided in an embodiment of this application.

[0048] Figure 4 A top view of the display screen and flexible circuit board of the bonding area provided in an embodiment of this application.

[0049] Figure 5 for Figure 4 Enlarged structural diagram of the first and second marks.

[0050] Figure 6 Another top view of the display screen and flexible circuit board of the bonding area provided in an embodiment of this application.

[0051] Figure 7 for Figure 6 Enlarged structural diagram of the first and second marks.

[0052] Figure 8 Another top view of the display screen and flexible circuit board of the bonding area provided in an embodiment of this application.

[0053] Figure 9 for Figure 8 Enlarged structural diagram of the first and second marks.

[0054] Figure 10 A top view of the first and second marks provided for embodiments of this application.

[0055] Figure 11 Another top view of the first and second markings provided for embodiments of this application.

[0056] Figure 12 A top view of the second marker provided in an embodiment of this application.

[0057] Figure 13 A top view of the first marker provided for an embodiment of this application.

[0058] Figure 14 This is a flowchart illustrating the alignment determination method provided in an embodiment of this application.

[0059] Explanation of reference numerals in the attached figures:

[0060] 100. Display panel; 100a. Bonding area; 101a. First sub-bonding area; 102a. Second sub-bonding area; 103a. Third sub-bonding area; 101. Display screen; 102. Flexible circuit board; 111. First bonding part; 112. Second bonding part; 121. First mark; 122. Second mark; 123. Third mark; 124. Fourth mark; 131. First connecting pad; 132. Second connecting pad; 133. 134. Third connecting pad; 135. Fourth connecting pad; 136. Fifth connecting pad; 137. Sixth connecting pad; 141. First extension segment; 142. Second extension segment; 143. Third extension segment; 144. Fourth extension segment; 145. Fifth extension segment; 146. Sixth extension segment; 151. First sub-section; 152. Second sub-section; 153. Third sub-section; 154. Fourth sub-section; 155. Fifth sub-section; 156. Sixth sub-section. Detailed Implementation

[0061] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0062] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, this does not indicate any order, quantity, or importance, but is merely used to distinguish different components. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. Words such as “comprising” or “including” mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0064] Organic Light Emitting Diode (OLED) display technology is considered the most promising next-generation flat panel display technology. Compared with liquid crystal display technology, OLED display technology has advantages such as low energy consumption, low cost, self-emissiveness, wide viewing angle, and fast response speed.

[0065] In the process of realizing this application, the inventors discovered the following problems in the related technology: the display panel includes a bonding area, the display panel includes a display screen and a flexible circuit board, the display screen located in the bonding area includes a first bonding part and a first pad disposed on the first bonding part, the flexible circuit board located in the bonding area includes a second bonding part and a second pad disposed on the second bonding part, the first bonding part and the second bonding part are stacked on each other, and the first pad and the second pad are bonded together.

[0066] During the bonding process of the first and second pads, thermal pressing is performed on the first and second pads, causing thermal expansion of the display screen and flexible circuit board in the bonding area. In addition, the actual dimensions of the finished display screen and flexible circuit board have certain errors (i.e. tolerances), which can easily lead to alignment deviations after the first and second pads are bonded. If the actual alignment deviation exceeds the preset deviation and is not detected, the connection area between the first and second pads in the final product of the display panel will be small, resulting in poor bonding stability or even poor bonding. Furthermore, the failure to improve the process in time will lead to repeated bonding failures, resulting in waste of production materials and reduced product yield.

[0067] In view of at least one of the above problems, embodiments of this application provide a display panel, a display device, and an alignment determination method, which is beneficial to increase the connection area between the first connecting pad and the second connecting pad, and improve the bonding stability between the display screen and the flexible circuit board.

[0068] The following will combine Figures 1-14 The display panel, display device, and alignment determination method provided in the embodiments of this application will be described.

[0069] See Figure 1The display panel 100 may have a first direction X, a second direction Y, and a third direction, all of which are different. The first direction X and the second direction Y can be any two different directions parallel to the display screen 101, and the third direction can be any direction intersecting the display screen 101. For example, the first direction X, the second direction Y, and the third direction can be perpendicular to each other. For example, the first direction X can be the width direction of the display screen 101, the second direction Y can be the length direction of the display screen 101, and the third direction can be the thickness direction of the display screen 101. The length, width, and thickness in the embodiments of this application are merely for descriptive convenience and do not imply any limitation on the dimensions. For example, the width can be greater than, equal to, or less than the length.

[0070] See Figure 1 and Figure 4 The display panel 100 may include a display screen 101 and a flexible circuit board 102, and the display screen 101 and the flexible circuit board 102 can be bonded together. The display screen 101 includes a first bonding portion 111 and a first connecting pad 131, with the first connecting pad 131 disposed on the first bonding portion 111. The flexible circuit board 102 may include a second bonding portion 112 and a second connecting pad 132, with the second connecting pad 132 disposed on the second bonding portion 112. The second connecting pad 132 is disposed on the side of the first connecting pad 131 opposite to the first bonding portion 111, and the second bonding portion 112 is disposed on the side of the second connecting pad 132 opposite to the first bonding portion 111. The first connecting pad 131 and the second connecting pad 132 are bonded together to conduct electricity between them.

[0071] For example, the first binding part 111 and the second binding part 112 are stacked along the thickness direction of the display screen 101.

[0072] See Figure 1 For example, the display panel includes a display area and a bonding area 100a, and the display screen 101 located in the bonding area 100a can be used to bond and connect a flexible circuit board 102. A first bonding part 111 and a second bonding part 112 are located in the bonding area 100a.

[0073] For example, see Figure 2 and Figure 3 There are multiple first connecting pads 131 and multiple second connecting pads 132. The multiple first connecting pads 131 are correspondingly arranged with the multiple second connecting pads 132, and the first connecting pads 131 are connected to the corresponding second connecting pads 132. The multiple first connecting pads 131 are arranged at intervals along the first direction X, and the multiple second connecting pads 132 are arranged at intervals along the first direction X.

[0074] See Figure 2 and Figure 3The extension directions of the first connecting pad 131 and the second connecting pad 132 are both inclined to intersect the first direction X (with an included angle of θ), which makes the dimensions of the extension directions of the first connecting pad 131 and the second connecting pad 132 larger, thereby increasing the bonding area and yield of the first connecting pad 131 and the second connecting pad 132.

[0075] The first mark 121 and the second mark 122 provided in the embodiments of this application will be described below.

[0076] See Figure 4 The display screen 101 includes a first mark 121, and the flexible circuit board 102 includes a second mark 122. The first mark 121 and the second mark 122 are arranged opposite to each other along the thickness direction of the display screen 101, and the first mark 121 and the second mark 122 can be connected. An imaging device is used to obtain the actual alignment deviation between the first mark 121 and the second mark 122. The alignment deviation (i.e., the actual alignment deviation) is determined to be less than or equal to a preset deviation to identify the bonding yield and monitor the bonding process for quality. If the alignment deviation is less than or equal to the preset deviation, the first mark 121 and the second mark 122 are successfully aligned, and the first connecting pad 131 and the second connecting pad 132 are successfully aligned, resulting in a larger bonding area and greater bonding stability between the first connecting pad 131 and the second connecting pad 132. If the alignment deviation is greater than the preset deviation, the first mark 121 and the second mark 122 fail to align, and the first connecting pad 131 and the second connecting pad 132 fail to align, resulting in a smaller bonding area or even bonding failure between the first connecting pad 131 and the second connecting pad 132.

[0077] For example, the first connecting pad 131 and the first mark 121 are both connected to one side of the first binding part 111 along the thickness direction of the display screen 101.

[0078] For example, the second connecting pad 132 and the second mark 122 are both connected to one side of the second binding portion 112 along the thickness direction of the display screen 101.

[0079] For example, the first connecting pad 131 and the first mark 121 are arranged along the first direction X.

[0080] For example, the second connecting pad 132 and the second mark 122 are arranged along the first direction X.

[0081] For example, the first binding part 111 has a third center line S3, which extends along the second direction Y, and the display screens 101 on both sides of the third center line S3 can be symmetrically arranged.

[0082] For example, the second binding part 112 has a fourth center line S4, which extends along the second direction Y, and the flexible circuit boards 102 on both sides of the fourth center line S4 can be symmetrically arranged.

[0083] For example, see Figure 2 and Figure 3 The angle between the extension direction of either the first connecting pad 131 or the second connecting pad 132 and the first direction X is θ (where the angle is acute), and the distance between the center of the first mark 121 along the second direction Y and the center of the second mark 122 along the second direction Y is A ( Figure 7 The distance between the center of the first mark 121 along the first direction X and the center of the second mark 122 along the first direction X is B ( Figure 10 The first connecting pad 131 has a first center line S1, the extension direction of which is parallel to the extension direction of the first connecting pad 131. The second connecting pad 132 has a second center line S2, the extension direction of which is parallel to the extension direction of the second connecting pad 132. The maximum distance along the first direction X between the first center lines S1 of the two outermost first connecting pads 131 is D1, and the tolerance of the maximum distance D1 is T1. The maximum distance along the first direction X between the second center lines S2 of the two outermost second connecting pads 132 is D2, and the tolerance of the maximum distance D2 is T2. The distance between the first center line S1 and the sidewalls of the corresponding first connecting pad 131 along the first direction X is equal. The distance between the second center line S2 and the sidewalls of the corresponding second connecting pad 132 along the first direction X is also equal.

[0084] It should be noted that tolerance refers to the allowable variation in dimensions. Due to factors such as machining or measurement, the actual dimensions after completion will have a certain error. The actual dimensions need to be controlled within the allowable range of variation; this allowable variation is called tolerance. Because of tolerances T1 and T2, there will be a misalignment between the first connecting pad 131 and the second connecting pad 132.

[0085] In this embodiment, by setting a first mark 121 and a second mark 122, the imaging device can automatically acquire the alignment deviation between the first mark 121 and the second mark 122, and determine whether the alignment deviation is less than or equal to a preset deviation, thereby identifying whether the alignment deviation between the first connecting pad 131 and the second connecting pad 132 is less than or equal to the preset deviation. If the alignment deviation between the first mark 121 and the second mark 122 is less than or equal to the preset deviation, it indicates that the first connecting pad 131 and the second connecting pad 132 are successfully aligned, the bonding area between the first connecting pad 131 and the second connecting pad 132 is large, and the bonding stability is high. If the alignment deviation between the first mark 121 and the second mark 122 is greater than the preset deviation, it indicates that the first connecting pad 131 and the second connecting pad 132 have failed to align. It is necessary to investigate the possible causes of excessive alignment deviation, improve the process in a timely manner to prevent the recurrence of poor bonding, thereby reducing the waste of production materials, lowering production costs, and improving product yield. The alignment deviation between the first mark 121 and the second mark 122 can be used to indicate the alignment deviation between the first connecting pad 131 and the second connecting pad 132.

[0086] For example, the imaging device can automatically identify alignment deviations between the first mark 121 and the second mark 122, thereby improving production efficiency.

[0087] It should be noted that the tolerance T1 / 2 is the result of the tolerance T1 causing the first connecting pad 131 to be relative to the third centerline S3 ( Figure 2 The maximum alignment deviation along the first direction X, tolerance T2 / 2 is the tolerance T2 causing the second connecting pad 132 to be relative to the fourth centerline S4 ( Figure 3 The maximum alignment deviation along the first direction X, The maximum alignment deviation (i.e., preset deviation) between the first connecting pad 131 and the second connecting pad 132 along the first direction X caused by tolerances T1 and T2, if the alignment deviation between the first connecting pad 131 and the second connecting pad 132 along the first direction X is controlled to be less than or equal to... ,Right now This avoids misalignment between the first connecting pad 131 and the second connecting pad 132 along the first direction X caused by tolerances T1 and T2, resulting in a smaller alignment deviation between the first connecting pad 131 and the second connecting pad 132 along the first direction X, and a larger connection area between the first connecting pad 131 and the second connecting pad 132, which is beneficial to improving bonding stability. When applied to medium and large-sized display panels, it can solve the problem of misalignment and short circuit between the first connecting pad 131 and the second connecting pad 132 caused by excessive maximum distances D1 and D2, and can reduce the requirements for tolerances T1 and T2.

[0088] The maximum alignment deviation between the first connecting pad 131 and the second connecting pad 132 along the first direction X. This translates into the maximum alignment deviation between the first connecting pad 131 and the second connecting pad 132 along the second direction Y. If the alignment deviation between the first connecting pad 131 and the second connecting pad 132 along the second direction Y is controlled to be less than or equal to... ,Right now This avoids the misalignment of the first connecting pad 131 and the second connecting pad 132 along the second direction Y caused by tolerances T1 and T2, resulting in a smaller misalignment of the first connecting pad 131 and the second connecting pad 132 along the second direction Y, and a larger connection area between the first connecting pad 131 and the second connecting pad 132, which is beneficial to improving the bonding stability.

[0089] For example, if it is determined that the binding between the first connecting pad 131 and the second connecting pad 132 has failed, the imaging device can issue an alarm so that the staff can be informed of the binding failure in a timely manner.

[0090] In some embodiments, see Figure 12 One of the first mark 121 and the second mark 122 includes a first extension 141, a second extension 142 and a third extension 143 connected together. The first extension 141 and the third extension 143 both extend along the second direction Y. The second extension 142 extends along the first direction X. The first extension 141 and the third extension 143 both include a first sub-part 151, a second sub-part 152 and a third sub-part 153 connected sequentially along the second direction Y. The two ends of the second extension 142 are respectively connected to the second sub-part 152 of the first extension 141 and the second sub-part 152 of the third extension 143.

[0091] In some embodiments, see Figure 13 The other of the first mark 121 and the second mark 122 includes a connected fourth extension 144, a fifth extension 145 and a sixth extension 146. The fourth extension 144 and the sixth extension 146 both extend along a first direction X, and the fifth extension 145 extends along a second direction Y. The fourth extension 144 and the sixth extension 146 both include a fourth sub-part 154, a fifth sub-part 155 and a sixth sub-part 156 connected sequentially along the first direction X. The two ends of the fifth extension 145 are respectively connected to the fifth sub-part 155 of the fourth extension 144 and the fifth sub-part 155 of the sixth extension 146.

[0092] In this embodiment, one of the first mark 121 and the second mark 122 is H-shaped, and the other is I-shaped. This application uses the example of the second mark 122 being H-shaped and the first mark 121 being I-shaped for illustration.

[0093] In some embodiments, see Figure 4 and Figure 5 When the alignment deviation between the first mark 121 and the second mark 122 along the first direction X is 0, the centers of the first mark 121 and the second mark 122 along the first direction X coincide along the thickness direction of the display screen 101. When the alignment deviation between the first mark 121 and the second mark 122 along the second direction Y is 0, the centers of the first mark 121 and the second mark 122 along the second direction Y coincide along the thickness direction of the display screen 101. The dimension of the first mark 121 along the first direction X is equal to the dimension of the second mark 122 along the first direction X. The dimension of the first mark 121 along the second direction Y is equal to the dimension of the second mark 122 along the second direction Y. The first mark 121 and the second mark 122 are generally arranged in a grid shape, and the outer contour of the overall structure of the first mark 121 and the second mark 122 is rectangular.

[0094] For example, see Figure 12 and Figure 13 At least one of the first extension segment 141 and the third extension segment 143 has a dimension along the first direction X equal to the dimension of the fifth extension segment 145 along the first direction X. For example, the dimension of the first extension segment 141 along the first direction X is equal to the dimension of the fifth extension segment 145 along the first direction X, and the sum of the dimensions of the fifth extension segment 145 and the two fifth sub-parts 155 along the second direction Y can be equal to the dimension of the first extension segment 141 along the second direction Y. When the overall structure formed by the fifth extension segment 145 and the two fifth sub-parts 155 coincides with the first extension segment 141 along the thickness direction of the display screen 101 ( Figure 10 The first mark 121 is offset to the left relative to the second mark 122 to the maximum alignment deviation. For example, the dimension of the third extension 143 along the first direction X is equal to the dimension of the fifth extension 145 along the first direction X, and the sum of the dimensions of the fifth extension 145 and the two fifth sub-parts 155 along the second direction Y can be equal to the dimension of the third extension 143 along the second direction Y. This occurs when the overall structure formed by the fifth extension 145 and the two fifth sub-parts 155 coincides with the third extension 143 along the thickness direction of the display screen 101. Figure 11 The first mark 121 is shifted to the right relative to the second mark 122 to the maximum alignment deviation.

[0095] For example, see Figure 12 and Figure 13At least one of the fourth extension segment 144 and the sixth extension segment 146 has a dimension along the second direction Y equal to the dimension of the second extension segment 142 along the second direction Y. For example, the dimension of the fourth extension segment 144 along the second direction Y is equal to the dimension of the second extension segment 142 along the second direction Y, and the sum of the dimensions of the second extension segment 142 and the two second sub-parts 152 along the first direction X can be equal to the dimension of the fourth extension segment 144 along the first direction X. When the overall structure formed by the second extension segment 142 and the two second sub-parts 152 coincides with the fourth extension segment 144 along the thickness direction of the display screen 101 ( Figure 9 The first mark 121 is offset upward relative to the second mark 122 to the maximum alignment deviation. For example, the dimension of the sixth extension 146 along the second direction Y is equal to the dimension of the second extension 142 along the second direction Y, and the sum of the dimensions of the second extension 142 and the two second sub-parts 152 along the first direction X can be equal to the dimension of the sixth extension 146 along the first direction X, when the overall structure formed by the second extension 142 and the two second sub-parts 152 coincides with the sixth extension 146 along the thickness direction of the display screen 101 ( Figure 7 The first mark 121 is offset downward relative to the second mark 122 to the maximum alignment deviation.

[0096] For example, see Figure 12 and Figure 13 The dimension D3 of at least one of the first sub-parts 151 and the third sub-parts 153 along the second direction Y is For example, the dimension of the first sub-part 151 along the second direction Y is... When the first mark 121 shifts upward relative to the second mark 122 to the maximum alignment deviation, the overall structure formed by the second extension 142 and the two second sub-sections 152 coincides with the fourth extension 144 along the thickness direction of the display screen 101. Figure 8 and Figure 9 For example, the dimension D3 of the third sub-part 153 along the second direction Y is... When the first mark 121 is offset downward relative to the second mark 122 to the maximum alignment deviation, the overall structure formed by the second extension 142 and the two second sub-sections 152 coincides with the sixth extension 146 along the thickness direction of the display screen 101. Figure 6 and Figure 7 ).

[0097] For example, see Figure 12 and Figure 13 At least one of the fourth sub-part 154 and the sixth sub-part 156 has a dimension D4 along the first direction X. For example, the dimension of the fourth sub-part 154 along the first direction X is... When the first mark 121 shifts to the left relative to the second mark 122 to the maximum alignment deviation, the overall structure formed by the fifth extension 145 and the two fifth sub-parts 155 coincides with the first extension 141 along the thickness direction of the display screen 101. Figure 10 For example, the dimension D4 of the sixth sub-part 156 along the first direction X is... When the first mark 121 is offset to the right relative to the second mark 122 to the maximum alignment deviation, the overall structure formed by the fifth extension 145 and the two fifth sub-sections 155 coincides with the third extension 143 along the thickness direction of the display screen 101. Figure 11 ).

[0098] For example, see Figure 2 The maximum distance between the two outermost first center lines S1 of the plurality of first connecting pads 131 along the first direction X is D1, and the tolerance of the maximum distance D1 is T1. The ratio of T1 to D1 ranges from 0.02 to 0.05, which avoids T1 being too small, thus reducing the manufacturing difficulty of the plurality of first connecting pads 131, and also avoids T1 being too large, thus reducing the alignment deviation between the first connecting pad 131 and the second connecting pad 132. For example, the ratio of T1 to D1 can be 0.02, 0.03, 0.04, 0.05, or any value between 0.02 and 0.05.

[0099] For example, see Figure 3 The maximum distance between the two outermost second center lines S2 of the plurality of second connecting pads 132 along the first direction X is D2, and the tolerance of the maximum distance D2 is T3. The ratio of T2 to D2 ranges from 0.02 to 0.05, which avoids T2 being too small, thus reducing the difficulty of manufacturing the plurality of second connecting pads 132, and also avoids T2 being too large, thus reducing the alignment deviation between the first connecting pad 131 and the second connecting pad 132. For example, the ratio of T1 to D1 can be 0.02, 0.03, 0.04, 0.05, or any value between 0.02 and 0.05.

[0100] The following describes the connecting pad provided in the embodiments of this application.

[0101] For example, the dimension of the first connecting pad 131 along the extension direction is L1, and the dimension of the second connecting pad 132 along the extension direction is L2, where L1 < L2. This helps to reduce the difficulty of binding the first connecting pad 131 and the second connecting pad 132. In addition, even if there is an alignment deviation between the first connecting pad 131 and the second connecting pad 132, the binding area between the first connecting pad 131 and the second connecting pad 132 can be larger.

[0102] For example, the maximum alignment deviation of the first mark 121 and the second mark 122 along the first direction X. This is converted into the maximum alignment deviation of the first mark 121 and the second mark 122 along the extension direction of the first connecting pad 131. ,when Even when the alignment deviation of the first mark 121 and the second mark 122 along the extension direction of the first connecting pad 131 reaches the maximum alignment deviation, the bonding area between the first connecting pad 131 and the second connecting pad 132 is still large.

[0103] In some embodiments, see Figure 2 and Figure 3 The binding area 100a includes a first sub-binding area 101a and a second sub-binding area 102a. The second sub-binding area 102a is located on both sides of the first sub-binding area 101a along the first direction X. The first connecting pad 131 and the second connecting pad 132 are located in the first sub-binding area 101a. The first mark 121 and the second mark 122 are located in the second sub-binding area 102a.

[0104] It should be noted that in the central region of the bonding area 100a, the alignment deviation caused by the thermal expansion of the display screen 101 and the flexible circuit board 102 is relatively small. In the edge region of the bonding area 100a, the alignment deviation caused by the thermal expansion of the display screen 101 and the flexible circuit board 102 is relatively large.

[0105] For example, the first connecting pad 131 and the second connecting pad 132 are configured as signal transmission pads. Positioning the signal transmission pads close to the center region of the bonding area 100a helps to reduce the alignment deviation of the first connecting pad 131 and the second connecting pad 132 caused by thermal expansion.

[0106] In some embodiments, the bonding area 100a includes a third sub-bonding area 103a, which is located on the side of the second sub-bonding area 102a opposite to the first sub-bonding area 101a. The display screen 101 includes a third connecting pad 133 located in the third sub-bonding area 103a, and the flexible circuit board 102 includes a fourth connecting pad 134 located in the third sub-bonding area 103a. The third connecting pad 133 is connected to the side of the first bonding portion 111 facing the first connecting pad 131, and the fourth connecting pad 134 is connected between the third connecting pad 133 and the second bonding portion 112. The third connecting pad 133 and the fourth connecting pad 134 are configured as detection pads, which can be used to detect whether the circuits of the display panel 100 are normal. Thus, by placing the detection pads in the edge area of ​​the bonding area 100a, even if thermal expansion causes a large misalignment between the third connecting pad 133 and the fourth connecting pad 134, it will not affect the normal signal transmission of the display panel 100.

[0107] For example, at least one of the third connecting pad 133 and the fourth connecting pad 134 extends along the second direction Y. This helps to reduce the design difficulty of at least one of the third connecting pad 133 and the fourth connecting pad 134. In addition, the third connecting pad 133 and the fourth connecting pad 134 can be tested using existing testing equipment, without the need for new testing equipment, which can reduce testing costs.

[0108] For example, the dimension of either the third connecting pad 133 or the fourth connecting pad 134 along the first direction X is larger than the dimension of either the first connecting pad 131 or the second connecting pad 132 along the first direction X. This results in a larger dimension of the third connecting pad 133 and the fourth connecting pad 134 along the first direction X. Even if thermal expansion causes a larger alignment deviation between the third connecting pad 133 and the fourth connecting pad 134, they can still have a larger bonding area, which is less likely to affect the function of the display panel 100. Furthermore, making the dimensions of the first connecting pad 131 and the second connecting pad 132 along the first direction X smaller helps to increase the arrangement density of the first connecting pad 131 and the second connecting pad 132, thereby improving signal transmission efficiency.

[0109] For example, the number of either the third connecting pad 133 or the fourth connecting pad 134 is less than the number of either the first connecting pad 131 or the second connecting pad 132. This reduces the number of the third connecting pad 133 and the fourth connecting pad 134, which helps to reduce the area occupied by the third connecting pad 133 and the fourth connecting pad 134 in the bonding area 100a, providing more space for the first connecting pad 131 and the second connecting pad 132. In addition, it also increases the number of the first connecting pad 131 and the second connecting pad 132, which can improve signal transmission efficiency.

[0110] For example, the dimension of the extension direction of either the third connecting pad 133 or the fourth connecting pad 134 is smaller than the dimension of the extension direction of either the first connecting pad 131 or the second connecting pad 132. This makes the dimensions of the extension direction of the third connecting pad 133 and the fourth connecting pad 134 smaller, which can reduce the manufacturing cost of the third connecting pad 133 and the fourth connecting pad 134. In addition, making the dimensions of the extension direction of the first connecting pad 131 and the second connecting pad 132 larger is beneficial to increasing the bonding area between the first connecting pad 131 and the second connecting pad 132 and reducing the bonding difficulty between the first connecting pad 131 and the second connecting pad 132.

[0111] In some embodiments, the first sub-binding area 101a includes a first sub-area and a second sub-area, the first sub-area and the second sub-area are arranged along a first direction X, the first connecting pad 131 includes a first end and a second end along the extending direction, the second end of the first connecting pad 131 located in the first sub-area is inclined relative to the first end in a direction away from the second sub-area, and the second end of the first connecting pad 131 located in the second sub-area is inclined relative to the first end in a direction away from the first sub-area.

[0112] For example, the first connecting pad 131 located in the first sub-region and the first connecting pad 131 located in the second sub-region are symmetrically arranged, which can reduce the design difficulty of the first connecting pad 131.

[0113] In some embodiments, the second connecting pad 132 includes a third end and a fourth end along the extension direction, the fourth end of the second connecting pad 132 located in the first sub-region is inclined relative to the third end in a direction away from the second sub-region, and the fourth end of the second connecting pad 132 located in the second sub-region is inclined relative to the third end in a direction away from the first sub-region.

[0114] For example, the second connecting pad 132 located in the first sub-region and the second connecting pad 132 located in the second sub-region are symmetrically arranged, which can reduce the design difficulty of the second connecting pad 132.

[0115] In some embodiments, the first sub-binding area 101a includes a third sub-area located between the first and second sub-areas, and the display screen 101 includes a fifth connection pad 135 disposed in the third sub-area. Figure 2 The fifth connecting pad 135 has a first sub-region and a second sub-region on both sides along the first direction X, and the flexible circuit board 102 includes a sixth connecting pad 136 located in the third sub-region. Figure 3 The sixth connecting pad 136 has a first sub-region and a second sub-region on both sides along the first direction X. The fifth connecting pad 135 is connected to the side of the first binding part 111 facing the first connecting pad 131. The sixth connecting pad 136 is connected between the fifth connecting pad 135 and the second binding part 112. At least one of the fifth connecting pad 135 and the sixth connecting pad 136 extends along the second direction Y. In this way, by setting the fifth connecting pad 135 and the sixth connecting pad 136 in the third sub-region, the area utilization rate of the third sub-region can be improved.

[0116] In some embodiments, the second sub-binding area 102a includes a fourth sub-area and a fifth sub-area, which are arranged along the second direction Y. The first mark 121 and the second mark 122 are both located in the fourth sub-area, and the display screen 101 includes a third mark 123 located in the fifth sub-area. Figure 2 The flexible circuit board 102 includes a fourth mark 124 located in the fifth sub-region. Figure 3The third mark 123 is connected to the side of the first binding part 111 facing the first connecting pad 131, and the fourth mark 124 is connected between the third mark 123 and the second binding part 112. In this way, when the first mark 121 and the second mark 122 fail, the alignment deviation can be obtained by setting the third mark 123 and the fourth mark 124. In addition, it is also beneficial to improve the area utilization rate in the second sub-binding area 102a.

[0117] For example, the extension direction of the third mark 123 is parallel to the extension direction of the first connecting pad 131, and the extension direction of the fourth mark 124 is parallel to the extension direction of the second connecting pad 132. This is beneficial to increase the size of the extension direction of the third mark 123 and the extension direction of the fourth mark 124.

[0118] For example, the display panel 100 can be an organic light-emitting diode (OLED) display panel, a micro organic light-emitting diode (Micro OLED) display panel, a light-emitting diode (LED) display panel, a quantum dot light-emitting diode (QLED) display panel, a mini light-emitting diode (MiniLED) display panel, a micro light-emitting diode (Micro LED) display panel, or a liquid crystal display (LCD) display panel, etc. This application uses an OLED display panel as an example for illustration.

[0119] The alignment determination method provided in the embodiments of this application will be described below.

[0120] This application provides an alignment determination method, applied to the display panel 100 in the above embodiment. The alignment determination method can be used to determine whether the alignment deviation of the first mark 121 and the second mark 122 of the display panel 100 is less than or equal to a preset deviation.

[0121] S100: Provides a display panel; the display panel includes a display screen and a flexible circuit board, the display screen includes a first bonding portion, a first mark and a plurality of first connecting pads, the first connecting pads and the first mark are both connected to one side of the first bonding portion along the thickness direction; the flexible circuit board includes a second bonding portion, a second mark and a plurality of second connecting pads, the second connecting pads and the second mark are both connected to one side of the second bonding portion along the thickness direction, the plurality of first connecting pads and the plurality of second connecting pads are correspondingly arranged, the first connecting pads are connected to the corresponding second connecting pads, and the first mark and the second mark are connected; wherein, the extending directions of the first connecting pads and the second connecting pads intersect obliquely with a first direction, and are connected to the first... The angle between the directions is θ, the distance between the center of the first mark along the second direction and the center of the second mark along the second direction is A, the first connecting pad has a first center line, the extension direction of the first center line is parallel to the extension direction of the first connecting pad, the second connecting pad has a second center line, the extension direction of the second center line is parallel to the extension direction of the second connecting pad, the tolerance of the maximum distance between the two outermost first center lines of the plurality of first connecting pads along the first direction is T1, the tolerance of the maximum distance between the two outermost second center lines of the plurality of second connecting pads along the first direction is T2, and any two of the first direction, the second direction and the thickness direction of the display screen are perpendicular.

[0122] S200: Obtain the graphics of the first and second markers.

[0123] S300: Based on the obtained graphs of the first and second marks, determine whether A, θ, T1, and T2 satisfy the formula. If yes, then the first connecting pad and the second connecting pad are successfully aligned along the second direction; if no, then the first connecting pad and the second connecting pad are not aligned along the second direction.

[0124] In this embodiment of the application, the alignment deviation between the first mark 121 and the second mark 122 along the second direction is obtained by an imaging device to determine whether it is less than or equal to a preset deviation, i.e., whether A is less than or equal to... This allows for the identification of whether the actual alignment deviation between the first connecting pad 131 and the second connecting pad 132 along the second direction is less than or equal to a preset deviation, thereby identifying the bonding yield and monitoring the bonding process for quality. If A is less than or equal to... This indicates that the first connecting pad 131 and the second connecting pad 132 are successfully aligned along the second direction Y, and the bonding area between the first connecting pad 131 and the second connecting pad 132 is large, resulting in greater bonding stability. If A is greater than... If the alignment deviation between the first mark 121 and the second mark 122 along the second direction Y is greater than the preset deviation, it indicates that the first connecting pad 131 and the second connecting pad 132 have failed to align. It is necessary to investigate the possible causes of excessive alignment deviation, improve the process in time to prevent the recurrence of poor bonding, thereby reducing the waste of production materials, lowering costs, and improving product yield.

[0125] In some embodiments, after obtaining the graphics of the first marker 121 and the second marker 122, it may be included to determine whether B, θ, T1, and T2 satisfy the given conditions based on the obtained graphics of the first marker 121 and the second marker 122. If yes, it indicates that the first connecting pad 131 and the second connecting pad 132 are successfully aligned along the first direction X, and the bonding area between the first connecting pad 131 and the second connecting pad 132 is large, resulting in greater bonding stability. If no, the first connecting pad 131 and the second connecting pad 132 have failed to align along the first direction X. It is necessary to investigate the possible causes of excessive alignment deviation, improve the process in a timely manner to prevent the recurrence of poor bonding, thereby reducing the waste of production materials and improving product yield.

[0126] The following describes the display device provided in the embodiments of this application.

[0127] This application provides a display device, which may include the display panel 100 in the above embodiments. The display device may be an electronic paper device, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, smart bracelet, smartwatch, supercomputer, navigator, wireless device, personal digital assistant (PDA), handheld or portable computer, GPS receiver / navigator, camera, MP4 video player, camcorder, game console, clock, calculator, television monitor, computer monitor, automotive display (e.g., odometer display, etc.), cockpit controller and / or display, camera view display (e.g., display of rearview camera in a vehicle), electronic billboard or sign, projector, and other mobile or fixed terminals.

[0128] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0129] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0130] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A display panel, characterized in that, include: The display screen includes a first bonding portion, a first mark, and a plurality of first connecting pads, wherein the first connecting pads and the first mark are all connected to one side of the first bonding portion along the thickness direction; A flexible circuit board includes a second bonding portion, a second mark, and a plurality of second connecting pads. The second connecting pads and the second mark are both connected to one side of the second bonding portion along the thickness direction. The plurality of first connecting pads are correspondingly disposed with the plurality of second connecting pads. The first connecting pads are connected to the corresponding second connecting pads, and the first mark is connected to the second mark. Wherein, the extending directions of the first connecting pad and the second connecting pad intersect the first direction at an angle θ with the first direction; the distance A between the center of the first mark along the second direction and the center of the second mark along the second direction; the first connecting pad has a first center line, the extending direction of the first center line being parallel to the extending direction of the first connecting pad; the second connecting pad has a second center line, the extending direction of the second center line being parallel to the extending direction of the second connecting pad; the tolerance of the maximum distance along the first direction between the two outermost first center lines of the plurality of first connecting pads is T1; the tolerance of the maximum distance along the first direction between the two outermost second center lines of the plurality of second connecting pads is T2; any two of the first direction, the second direction, and the thickness direction of the display screen are perpendicular; and A, θ, T1, and T2 satisfy the following formula: 。 2. The display panel according to claim 1, characterized in that, One of the first mark and the second mark includes a first extension segment, a second extension segment and a third extension segment connected together. The first extension segment and the third extension segment both extend along the second direction. The second extension segment extends along the first direction. The first extension segment and the third extension segment both include a first sub-part, a second sub-part and a third sub-part connected sequentially along the second direction. The two ends of the second extension segment are respectively connected to the second sub-part of the first extension segment and the second sub-part of the third extension segment. Preferably, the first connecting pad and the first mark are arranged along the first direction; Preferably, at least one of the first sub-part and the third sub-part has a dimension along the second direction of [missing value]. ; Preferably, the dimension of the first connecting pad along the extending direction is L1, and the dimension of the second connecting pad along the extending direction is L2, wherein L1 and L2 satisfy the following formula: L1 < L2; Preferably, L1, L2, θ, T1, and T2 satisfy the following formula: ; Preferably, the maximum distance along the first direction between the two outermost first center lines of the plurality of first connecting pads is D1, and the ratio of T1 to D1 is in the range of 0.02-0.05; Preferably, the maximum distance along the first direction between the two outermost second center lines of the plurality of second connecting pads is D2, and the ratio of T2 to D2 is in the range of 0.02-0.05; Preferably, the dimension of the first mark along the first direction is equal to the dimension of the second mark along the first direction; Preferably, the dimension of the first mark along the second direction is equal to the dimension of the second mark along the second direction.

3. The display panel according to claim 2, characterized in that, The distance B between the center of the first mark along the first direction and the center of the second mark along the first direction, wherein B, T1, and T2 satisfy the following formula: ； Preferably, the other of the first mark and the second mark includes a fourth extension segment, a fifth extension segment, and a sixth extension segment connected together. The fourth extension segment and the sixth extension segment both extend along the first direction, and the fifth extension segment extends along the second direction. The fourth extension segment and the sixth extension segment both include a fourth sub-part, a fifth sub-part, and a sixth sub-part connected sequentially along the first direction. The two ends of the fifth extension segment are respectively connected to the fifth sub-part of the fourth extension segment and the fifth sub-part of the sixth extension segment. Preferably, at least one of the first extension segment and the third extension segment has a dimension along the first direction equal to the dimension of the fifth extension segment along the first direction; Preferably, at least one of the fourth extension segment and the sixth extension segment has a dimension along the second direction equal to the dimension of the second extension segment along the second direction; Preferably, at least one of the fourth sub-part and the sixth sub-part has a dimension along the first direction of [missing value]. .

4. The display panel according to any one of claims 1-3, characterized in that, The display panel includes a bonding area, the first bonding part and the second bonding part are located in the bonding area, the bonding area includes a first sub-bonding area and a second sub-bonding area, the second sub-bonding area is disposed on both sides of the first sub-bonding area along the first direction, the first connecting pad and the second connecting pad are disposed in the first sub-bonding area, and the first mark and the second mark are disposed in the second sub-bonding area; Preferably, the bonding area includes a third sub-bonding area, which is located on the side of the second sub-bonding area opposite to the first sub-bonding area; the display screen includes a third connecting pad located in the third sub-bonding area; the flexible circuit board includes a fourth connecting pad located in the third sub-bonding area; the third connecting pad is connected to the side of the first bonding portion facing the first connecting pad; the fourth connecting pad is connected between the third connecting pad and the second bonding portion; and the third connecting pad and the fourth connecting pad are configured as detection pads. Preferably, the first connection pad and the second connection pad are configured as signal transmission pads; Preferably, at least one of the third connecting pad and the fourth connecting pad extends along the second direction; Preferably, the dimension of either the third connecting pad or the fourth connecting pad along the first direction is greater than the dimension of either the first connecting pad or the second connecting pad along the first direction. Preferably, the number of either the third connecting pad or the fourth connecting pad is less than the number of either the first connecting pad or the second connecting pad; Preferably, the dimension of the extension direction of either the third connecting pad or the fourth connecting pad is smaller than the dimension of the extension direction of either the first connecting pad or the second connecting pad.

5. The display panel according to claim 4, characterized in that, The first sub-binding area includes a first sub-area and a second sub-area, the first sub-area and the second sub-area are arranged along the first direction, the first connecting pad includes a first end and a second end along the extending direction, the second end of the first connecting pad located in the first sub-area is inclined relative to the first end in a direction away from the second sub-area, and the second end of the first connecting pad located in the second sub-area is inclined relative to the first end in a direction away from the first sub-area. Preferably, the first connecting pad located in the first sub-region and the first connecting pad located in the second sub-region are symmetrically arranged; Preferably, the second connecting pad includes a third end and a fourth end along the extending direction, the fourth end of the second connecting pad located in the first sub-region is inclined relative to the third end in a direction away from the second sub-region, and the fourth end of the second connecting pad located in the second sub-region is inclined relative to the third end in a direction away from the first sub-region. Preferably, the second connecting pad located in the first sub-region and the second connecting pad located in the second sub-region are symmetrically arranged.

6. The display panel according to claim 5, characterized in that, The first sub-bonding area includes a third sub-area, which is located between the first sub-area and the second sub-area. The display screen includes a fifth connecting pad disposed in the third sub-area. The flexible circuit board includes a sixth connecting pad located in the third sub-area. The fifth connecting pad is connected to the side of the first bonding portion facing the first connecting pad. The sixth connecting pad is connected between the fifth connecting pad and the second bonding portion. At least one of the fifth connecting pad and the sixth connecting pad extends along the second direction.

7. The display panel according to claim 4, characterized in that, The second sub-bonding area includes a fourth sub-area and a fifth sub-area, which are arranged along the second direction. The first mark and the second mark are both located in the fourth sub-area. The display screen includes a third mark disposed in the fifth sub-area. The flexible circuit board includes a fourth mark disposed in the fifth sub-area. The third mark is connected to the side of the first bonding portion facing the first connecting pad. The fourth mark is connected between the third mark and the second bonding portion. The extension direction of the third mark is parallel to the extension direction of the first connecting pad, and the extension direction of the fourth mark is parallel to the extension direction of the second connecting pad.

8. A display device, characterized in that, Includes the display panel described in any one of claims 1-7.

9. A method for determining alignment, characterized in that, include: Provide a display panel; The display panel includes a display screen and a flexible circuit board. The display screen includes a first bonding portion, a first mark, and a plurality of first connecting pads. The first connecting pads and the first mark are both connected to one side of the first bonding portion along its thickness direction. The flexible circuit board includes a second bonding portion, a second mark, and a plurality of second connecting pads. The second connecting pads and the second mark are both connected to one side of the second bonding portion along its thickness direction. The plurality of first connecting pads and the plurality of second connecting pads are correspondingly arranged, with each first connecting pad connected to its corresponding second connecting pad, and each first mark connected to its second mark. The extending directions of the first and second connecting pads intersect a first direction at an angle of [value missing]. θ, the distance A between the center of the first mark along the second direction and the center of the second mark along the second direction, the first connecting pad has a first center line, the extension direction of the first center line is parallel to the extension direction of the first connecting pad, the second connecting pad has a second center line, the extension direction of the second center line is parallel to the extension direction of the second connecting pad, the tolerance of the maximum distance along the first direction between the two outermost first center lines of the plurality of first connecting pads is T1, the tolerance of the maximum distance along the first direction between the two outermost second center lines of the plurality of second connecting pads is T2, and any two of the first direction, the second direction and the thickness direction of the display screen are perpendicular; Obtain the graphics of the first and second markers; Based on the obtained graphics of the first and second markers, determine whether A, θ, T1, and T2 satisfy the formula. If yes, then the first connecting pad and the second connecting pad are successfully aligned along the second direction; if no, then the first connecting pad and the second connecting pad are not aligned along the second direction.

10. The alignment determination method according to claim 9, characterized in that, The distance between the center of the first mark along the first direction and the center of the second mark along the first direction is B; After obtaining the graphics of the first and second markers, the process includes: Based on the obtained graphics of the first and second markers, determine whether B, T1, and T2 satisfy the formula. ; If yes, then the first connecting pad and the second connecting pad are successfully aligned along the first direction; if no, then the first connecting pad and the second connecting pad fail to align along the first direction.

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