Display module and electronic device

Abstract

The application provides a display module and an electronic device. The display module comprises n chip on film (COF) and a flexible printed circuit (FPC). The n COF comprises n COF gold finger groups, and the FPC comprises n FPC gold finger groups. Each COF gold finger group comprises a plurality of COF gold fingers, and each FPC gold finger group comprises a plurality of FPC gold fingers. The COF gold fingers correspond to the FPC gold fingers one by one and have the same inclination angle. The n COF gold finger groups comprise a first COF gold finger group and a second COF gold finger group. The inclination angles of the plurality of COF gold fingers in one of the first and second COF gold finger groups are within the range (0°, 90°), and the inclination angles of the plurality of COF gold fingers in the other COF gold finger group are within the range (90°, 180°). The gold finger design in the display module can avoid the problems of short circuit or open circuit when the gold fingers are connected.

Description

TECHNICAL FIELD

[0001] The present application relates to the display field, and more particularly, to a display module and an electronic device. BACKGROUND

[0002] The display screen is the main component on the electronic device such as mobile phone, tablet computer, television, computer, etc. The display content mainly depends on the electrical signal input by the integrated circuit (IC) carried by the chip on flex (COF) for control. The electrical signal on the IC carried by the COF is from the flexible printed circuit (FPC). Moreover, in the actual preparation process, the IC carried by the COF needs to form an electrical connection with the display screen and the FPC, and needs to use anisotropic conductive film (ACF) material to realize the binding process. Therefore, it can be easily seen that the display screen using the COF has two bindings, which are the bindings between the COF and the display screen and the bindings between the COF and the FPC. Generally, for a large-size display screen (for example, a large-size mobile phone and a television, etc.), multiple COFs need to be used to meet the electrical signal required for display screen driving. At present, using multiple COFs on a large-size television (for example: 50 inches) is a mature technology, but for a large-size mobile phone (for example: 8 inches), the main problem is that the size of the large-size mobile phone is much smaller than that of the television. In order to achieve the predetermined resolution, the wire density inside the mobile phone and the gold finger density of the outgoing wire are increased by several times compared with the television.

[0003] Moreover, in the application scenario with multiple COFs, since the binding between the COF and the display screen usually requires higher alignment accuracy, in the preparation process, multiple COFs and the display screen are first separately bound, and then the multiple COFs are integrally bound with the FPC. However, when the multiple COFs are bound with the FPC, the cumulative tolerance chain is long, so that the total pitch (TTP) of the gold fingers of the multiple COFs is not equal to the TTP of the gold fingers of the FPC. In the prior art, the binding area of the COF and the FPC usually adopts a straight gold finger design. Under this design, if the TTP of the gold fingers of the multiple COFs is not equal to the TTP of the gold fingers of the FPC, no matter how the FPC moves, the FPC cannot be aligned with the multiple COFs, so that when the gold fingers of the multiple COFs are connected with the gold fingers of the FPC, the problem of short circuit or open circuit occurs.

[0004] Therefore, how to avoid the problem of short circuit or open circuit of the gold fingers when the TTP of the gold fingers of the multiple COFs is not equal to the TTP of the gold fingers of the FPC is a problem that needs to be solved by the present application. SUMMARY

[0005] The application provides a display module and an electronic device, which can avoid the problem of short circuit or open circuit of the gold fingers when the TTPs of the gold fingers of the COFs and the gold fingers of the FPC are not equal.

[0006] In a first aspect, a display module is provided, comprising: n chip on film (COF) and a flexible printed circuit (FPC), n≥2; wherein the n COFs comprise n COF gold finger groups, the FPC comprises n FPC gold finger groups, each of the n COF gold finger groups comprises a plurality of COF gold fingers, each of the n FPC gold finger groups comprises a plurality of FPC gold fingers, the COF gold fingers correspond to the FPC gold fingers one by one, and the COF gold fingers have the same inclination angle as the corresponding FPC gold fingers; the n COF gold finger groups comprise a first COF gold finger group and a second COF gold finger group, the first COF gold finger group is located on the left side of the second COF gold finger group, the direction from the first COF gold finger group to the second COF gold finger group is a first direction, and the inclination angle is the included angle between the first direction and the gold fingers; the inclination angles of the plurality of COF gold fingers in the first COF gold finger group are within the range (0°, 90°), and the inclination angles of the plurality of COF gold fingers in the second COF gold finger group are within the range (90°, 180°); or, the inclination angles of the plurality of COF gold fingers in the first COF gold finger group are within the range (90°, 180°), and the inclination angles of the plurality of COF gold fingers in the second COF gold finger group are within the range (0°, 90°).

[0007] In the embodiments of the application, the plurality of COF gold fingers in the first COF gold finger group and the second COF gold finger group in the n COFs and the plurality of FPC gold fingers corresponding thereto are designed to be inclined, and the inclination angles of the plurality of COF gold fingers in one of the first COF gold finger group and the second COF gold finger group are within the range (0°, 90°), and the inclination angles of the plurality of COF gold fingers in the other COF gold finger group are within the range (90°, 180°). When the TTPs of the gold fingers of the plurality of COFs and the TTPs of the FPC gold fingers are mismatched and deviate, the Y direction can be moved to compensate for the deviation in the X direction (the first direction), so as to improve the yield and reliability of the binding process of the plurality of COFs and the FPC, and avoid the problem of short circuit or open circuit of the gold fingers when connected due to the inability to compensate for the deviation in the X direction.

[0008] In combination with the first aspect, in some implementations of the first aspect, the inclination angles of the plurality of COF gold fingers in the first COF gold finger group are the same; and the inclination angles of the plurality of COF gold fingers in the second COF gold finger group are the same.

[0009] With reference to the first aspect, in some implementations of the first aspect, the tilt angles of the plurality of COF fingers in the first COF finger group are different; and the tilt angles of the plurality of COF fingers in the second COF finger group are different.

[0010] With reference to the first aspect, in some implementations of the first aspect, if the tilt angles of the plurality of COF fingers in the first COF finger group are within the range (0°, 90°), the tilt angles of the plurality of COF fingers in the second COF finger group are within the range (90°, 180°); the tilt angles of the plurality of COF fingers in the first COF finger group gradually increase from left to right and gradually approach 90°, and the tilt angles of the plurality of COF fingers in the second COF finger group gradually increase from left to right and gradually deviate from 90°.

[0011] With reference to the first aspect, in some implementations of the first aspect, if the tilt angles of the plurality of COF fingers in the first COF finger group are within the range (90°, 180°), the tilt angles of the plurality of COF fingers in the second COF finger group are within the range (0°, 90°); the tilt angles of the plurality of COF fingers in the first COF finger group gradually decrease from left to right and gradually approach 90°, and the tilt angles of the plurality of COF fingers in the second COF finger group gradually decrease from left to right and gradually deviate from 90°.

[0012] It should be understood that, in actual operation, due to the influence of factors such as pre-operation process and material expansion and contraction, when the plurality of COFs are bound with the FPC, the cumulative tolerance chain is long, so that the TTP of the gold fingers on the FPC and the gold fingers on the plurality of COFs is not equal, so that it is difficult to align. Moreover, for the plurality of gold fingers on the FPC, the cumulative tolerance from the center to both sides is getting larger and larger, so that the deviation of the corresponding COF gold fingers is also getting larger and larger. Because the tilt angle of the gold finger deviates from 90°, when moving a certain distance in the Y direction, the component in the X direction is larger; the tilt angle of the gold finger is closer to 90°, when moving a certain distance in the Y direction, the component in the X direction is smaller. Therefore, when designing the gold fingers, the tilt angles of the plurality of gold fingers from the center to both sides should be gradually deviated from 90° as much as possible. So that when compensating for the gold fingers far away and large deviation, it does not affect the alignment of the gold fingers close to the center and small deviation.

[0013] Therefore, in the embodiments of the present application, the tilt angles of the plurality of COF gold fingers in one of the first COF gold finger group and the second COF gold finger group are within the range (0°, 90°), and the tilt angles of the plurality of COF gold fingers in the other COF gold finger group are within the range (90°, 180°). Moreover, the plurality of COF gold fingers in the first COF gold finger group gradually approach 90° from left to right, and the plurality of COF gold fingers in the second COF gold finger group gradually deviate from 90° from left to right. Thus, the offset of the plurality of COF gold fingers and the FPC gold fingers can be better compensated.

[0014] With reference to the first aspect, in some implementations of the first aspect, the tilt angles of the plurality of COF gold fingers in the first COF gold finger group are within the range [70°, 80°], and the tilt angles of the plurality of COF gold fingers in the second COF gold finger group are within the range [100°, 110°]; or, the tilt angles of the plurality of COF gold fingers in the first COF gold finger group are within the range [100°, 110°], and the tilt angles of the plurality of COF gold fingers in the second COF gold finger group are within the range [70°, 80°].

[0015] With reference to the first aspect, in some implementations of the first aspect, the n COF gold finger groups further include a third COF gold finger group, the third COF gold finger group is located on the right side of the first COF gold finger group and on the left side of the second COF gold finger group, and the tilt angles of the plurality of COF gold fingers in the third COF gold finger group are closer to 90° than the tilt angles of the plurality of COF gold fingers in the first COF gold finger group and the second COF gold finger group.

[0016] With reference to the first aspect, in some implementations of the first aspect, the tilt angles of the plurality of COF gold fingers in the third COF gold finger group are the same.

[0017] Optionally, the tilt angles of the plurality of COF gold fingers in the third COF gold finger group are 90° or approximately 90°.

[0018] With reference to the first aspect, in some implementations of the first aspect, the tilt angles of the plurality of COF gold fingers in the third COF gold finger group are different.

[0019] Optionally, the tilt angles of the plurality of COF gold fingers in the first COF gold finger group and the left half of the plurality of COF gold fingers in the third COF gold finger group gradually approach 90° from left to right as a whole, and the right half of the plurality of COF gold fingers in the third COF gold finger group and the plurality of COF gold fingers in the second COF gold finger group gradually deviate from 90° from left to right as a whole.

[0020] In some implementations of the first aspect, the n COF finger groups further include a fourth COF finger group and a fifth COF finger group, the fourth COF finger group is located at the left side of the first COF finger group, and the fifth COF finger group is located at the right side of the second COF finger group; the tilt angles of the plurality of COF fingers in the fourth COF finger group are more deviated from 90° than the tilt angles of the plurality of COF fingers in the first COF finger group, and the tilt angles of the plurality of COF fingers in the fifth COF finger group are more deviated from 90° than the tilt angles of the plurality of COF fingers in the second COF finger group.

[0021] In some implementations of the first aspect, the tilt angles of the plurality of COF fingers in the fourth COF finger group are the same, and the tilt angles of the plurality of COF fingers in the fifth COF finger group are the same.

[0022] In some implementations of the first aspect, the tilt angles of the plurality of COF fingers in the fourth COF finger group are different, and the tilt angles of the plurality of COF fingers in the fifth COF finger group are different.

[0023] It should be understood that the plurality of COF fingers in the fourth COF finger group gradually approach 90° from left to right, and the plurality of COF fingers in the fifth COF finger group gradually deviate from 90° from left to right.

[0024] It should be understood that according to the design of the tilt angles described above, it can be deduced that the overall change rule of all COF fingers corresponding to the COF finger groups in the left half of the n COF finger groups from left to right is gradually approaching 90°, and the overall change rule of all COF fingers corresponding to the COF finger groups in the left half from left to right is gradually deviating from 90°.

[0025] In some implementations of the first aspect, the display module further includes n integrated circuits (ICs), and the n ICs are packaged on the n COFs, respectively.

[0026] In some implementations of the first aspect, the display module further includes a display screen, and the display screen is bound to the n COFs through the COF fingers.

[0027] The second aspect provides an electronic device including the display module in the first aspect or any possible implementation of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 FIG. 1 is an example diagram of a display module provided by an embodiment of the present application.

[0029] Figure 2FIG. 1 is a cross-sectional view of a display module according to an embodiment of the present application.

[0030] Figure 3 FIG. 2 is a flowchart of a manufacturing process of a display module according to an embodiment of the present application.

[0031] Figure 4 FIG. 3 is a diagram of a deviation generated by a manufacturing process according to an embodiment of the present application.

[0032] Figure 5 FIG. 4 is a diagram of an alignment deviation of a COF and a gold finger of an FPC according to an embodiment of the present application.

[0033] Figure 6 FIG. 5 is a diagram of a display module according to an embodiment of the present application.

[0034] Figure 7 FIG. 6 is a diagram of an inclination angle design corresponding to a single COF according to an embodiment of the present application.

[0035] Figure 8 FIG. 7 is a diagram of an inclination angle design when three COFs are present according to an embodiment of the present application.

[0036] Figure 9 FIG. 8 is a diagram of a deviation compensation process according to an embodiment of the present application.

[0037] Figure 10 FIG. 9 is a diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0038] To facilitate understanding, some technical terms involved in the embodiments of the present application are first introduced.

[0039] Anisotropic conductive film (ACF): refers to a connection process / material, which in the present application refers to a material used to connect two different interfaces together.

[0040] Chip on flex (COF): refers to a packaging process of an integrated circuit (IC), in which the IC is connected to a film surface through Au-Sn eutectic soldering to achieve complete interconnection of corresponding circuits.

[0041] Bonding: refers to providing stable electrical connection by pressing the gold fingers of different components through ACF to conduct.

[0042] Gold finger: that is, in the binding area each different electrical signal corresponding to the metal trace. Gold finger is composed of a large number of golden conductive pads, because its surface is plated with gold and the conductive pads are arranged like fingers, so it is called "gold finger".

[0043] Flexible printed circuit (FPC): refers to a kind of flexible printed circuit board with high reliability and excellent flexibility, which is made of polyimide or polyester film as substrate. FPC is also called soft circuit board and flexible circuit board, which has the characteristics of high wiring density, light weight, thin thickness and good bending property.

[0044] Film on panel bonding (FOP bonding): in this application, it refers to the electrical connection between the present IC and the panel (i.e. display screen) to provide the electrical signal required for panel driving. In this application, it is recorded as: FOP bonding.

[0045] Film on film bonding (FOF bonding): in this application, it refers to the electrical connection between the IC and the FPC to provide the electrical signal required for IC operation. In this application, it is recorded as: FOF bonding.

[0046] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings.

[0047] It should be understood that the display module of the embodiments of the present application can be applied to electronic devices including displays (or display products). For example, mobile phones, tablet computers, computers, televisions, etc., which are not limited by the present application.

[0048] Figure 1 is an example of a display module provided by the embodiments of the present application. As an example but not limitation, in Figure 1 , the display module 100 is a display module on a mobile phone, as shown in Figure 1 , the display module 100 includes a display screen 110, a COF 120 and a FPC 130.

[0049] Among them, the display screen 110 is the carrier of the display content. Optionally, the display screen 110 can also include a glass cover plate 140, which is located at the outermost side of the display screen 110 to provide structural protection.

[0050] The COF 120 is the carrier of the IC, and the COF 120 and the display screen 110 are electrically connected to provide the electrical signal required for driving the display screen 110.

[0051] The FPC 130 is electrically connected with the COF 120 and connected with the main board of the mobile phone to provide the electrical signal required for the operation of the IC and the display screen 110.

[0052] Optionally, the display module 100 can further include a polarizer, which is mainly used to filter ambient light.

[0053] It should be understood that there are multiple gold fingers on the display screen 110, the COF 120 and the FPC 130 in the display module 100 described above.

[0054] Figure 2 is a cross-sectional view of a display module provided by the present application.

[0055] As shown in Figure 2 , in the actual connection structure of the display module, gold fingers, i.e. metal traces, are included on the display screen, the COF and the FOP. The gold fingers on the display screen and the gold fingers on the COF are connected by ACF material to form a FOP binding area. The gold fingers on the COF and the gold fingers on the FPC are connected by ACF material to form a FOF binding area. Based on this, electrical connection between the display screen, the COF and the FOP is achieved.

[0056] It should be understood that for small-sized display screens, a single COF can be used for driving. However, for large-sized display screens, such as large-sized mobile phones (especially foldable screen mobile phones) and televisions, multiple COFs need to be used to meet the electrical signal requirements for display screen driving. At present, the use of multiple COFs on large-sized televisions (e.g. 50 inches) is a mature technology, but for large-sized mobile phones (e.g. 8 inches), the main problem is that the size of the mobile phone is much smaller than that of the television, which means that when the resolution of the television and the mobile phone is the same (e.g. both are 1080P), the internal trace density and the gold finger density of the mobile phone need to be doubled. For example, the distance between the gold fingers in the FOF binding area of the television can be more than 600 um, while the distance between the gold fingers in the FOF binding area of the mobile phone is about 160 um. This requires higher alignment accuracy of the gold fingers inside the mobile phone.

[0057] It should also be understood that in the application scenario with multiple COFs, since the binding between the COF and the display screen usually requires higher alignment accuracy (8 um to 10 um), the multiple COFs and the display screen are separately FOP-bound in the preparation process, and then the multiple COFs are integrally FOF-bound with the FPC.

[0058] Specifically, the preparation process of the display module provided by the present application will be briefly introduced below. Figure 3

[0059] Figure 3 ​This is an example diagram illustrating the manufacturing process of a display module provided in an embodiment of this application. For example... Figure 3 As shown, the manufacturing process 300 of the display module includes steps S310 to S360, which are described below.

[0060] S310, ACF is attached to the display screen.

[0061] Specifically, ACF material is attached to the gold finger area on the side of the display screen. In this application, ACF provides structural and electrical connections for bonding.

[0062] S320, COF and display screen alignment.

[0063] Specifically, by identifying the alignment marks on the display screen and COF, the gold fingers on the display screen and COF are adjusted and aligned one by one to ensure that the gold fingers are not misaligned.

[0064] S330, COF is laminated with the display screen.

[0065] Specifically, the COF and the display screen are pressed together by a heat-conducting pressure head, while the ACF material is heated and cured to form a strong structural and electrical connection.

[0066] S340, ACF and FPC are attached.

[0067] Specifically, ACF material is attached to the gold finger area on the FPC side.

[0068] S350, COF and FPC are aligned.

[0069] Specifically, by identifying the alignment marks on the FPC and COF, the gold fingers on the COF and FPC are adjusted and aligned one by one to ensure that the gold fingers are not misaligned.

[0070] S360, COF and FPC are pressed together.

[0071] Specifically, FPC and COF are pressed together using a heat-conducting pressure head, while ACF material is heated and cured to form a strong structural and electrical connection.

[0072] However, because the manufacturing process involves first bonding multiple COFs to the display screen individually, and then bonding the multiple COFs together with the FPC using FOF (Field-Oriented Folding), the cumulative tolerance chain length during the FOF bonding operation includes the bonding deviations of multiple COFs, the total pitch (TTP) deviation of the gold fingers of multiple COFs, the TTP deviation of the gold fingers of the FPC, the FOF bonding alignment deviation, the expansion and contraction deviation of the FPC substrate, and the cumulative expansion and contraction deviation of the COF substrate. Figure 4As shown in FIG. 1, the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. It should be understood that in actual COF and FPC, there are many gold fingers, and the distance between them is very small, so the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. Figure 5 As shown in FIG. 1, the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. It should be understood that in actual COF and FPC, there are many gold fingers, and the distance between them is very small, so the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. Figure 4 As shown in FIG. 1, the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. It should be understood that in actual COF and FPC, there are many gold fingers, and the distance between them is very small, so the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. Figure 5 The gold fingers in FIGS. 1, 2, and 3 are only examples and cannot constitute a limitation on the present application.

[0073] In the prior art, the binding area of the COF and the FPC usually adopts a straight gold finger design as shown in FIG. 2. Figure 4 As shown in FIG. 2, the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. It should be understood that in actual COF and FPC, there are many gold fingers, and the distance between them is very small, so the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. Figure 5 As shown in FIG. 2, the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. It should be understood that in actual COF and FPC, there are many gold fingers, and the distance between them is very small, so the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. Figure 5 As shown in FIG. 2, the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. It should be understood that in actual COF and FPC, there are many gold fingers, and the distance between them is very small, so the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. As shown in FIG. 2, the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF. It should be understood that in actual COF and FPC, there are many gold fingers, and the distance between them is very small, so the TTP of the gold fingers of the FPC is greater than the TTP of the gold fingers of the COF.

[0074] Based on this, the present application provides a display module. In the FOF binding area of the display module, an inclined gold finger design is adopted. When the TTP of the gold fingers of the COF and the FPC is out of tolerance, the inclined gold finger design can adjust and compensate the deviation in the transverse direction by longitudinal displacement, thereby avoiding the problem of short circuit or open circuit of the gold fingers, and reducing the product scrap rate.

[0075] The structure and design of the display module of the present application will be described in detail below with reference to the accompanying drawings. Figure 6 to Figure 9 The structure and design of the display module of the present application will be described in detail below with reference to the accompanying drawings. The structure and design of the display module of the present application will be described in detail below with reference to the accompanying drawings.

[0076] The structure and design of the display module of the present application will be described in detail below with reference to the accompanying drawings. Figure 6 As shown in FIG. 3, the inclined angle of the gold fingers of the COF is 45 degrees. It should be understood that the number of COFs and the design of the inclined angle of the gold fingers are only examples and cannot constitute a limitation on the present application. Figure 6 As shown in FIG. 3, the inclined angle of the gold fingers of the COF is 45 degrees. It should be understood that the number of COFs and the design of the inclined angle of the gold fingers are only examples and cannot constitute a limitation on the present application. Figure 6 As shown in FIG. 3, the inclined angle of the gold fingers of the COF is 45 degrees. It should be understood that the number of COFs and the design of the inclined angle of the gold fingers are only examples and cannot constitute a limitation on the present application. Figure 6 As shown in FIG. 3, the inclined angle of the gold fingers of the COF is 45 degrees. It should be understood that the number of COFs and the design of the inclined angle of the gold fingers are only examples and cannot constitute a limitation on the present application.

[0077] It should be understood that in the present application, the display module 600 comprises: n COFs and an FPC, n≥2.

[0078] Wherein, the n COFs comprise n COF gold finger groups, the FPC comprises n FPC gold finger groups, each of the n COF gold finger groups comprises a plurality of COF gold fingers, each of the n FPC gold finger groups comprises a plurality of FPC gold fingers, the COF gold fingers correspond to the FPC gold fingers one by one, and the COF gold fingers have the same inclination angle as the corresponding FPC gold fingers.

[0079] It should be understood that in actual operation, all COF gold fingers on the n COFs need to be bound to form electrical connection with all FPC gold fingers on the FPC one by one. Therefore, the number of COF gold fingers should be the same as the number of FPC gold fingers. It should also be understood that each COF gold finger has the same inclination angle as the corresponding FPC gold finger. Therefore, for the convenience of description, the inclination angle design of the gold fingers is described in the present application only by taking the gold fingers on the plurality of COFs as an example.

[0080] It should be understood that based on the one-to-one correspondence between the COF gold fingers and the FPC gold fingers, it can be seen that the COF gold fingers and the FPC gold fingers are the gold fingers of the FOF binding area described above. This means that the present application mainly describes the inclination angle design of the gold fingers of the FOF binding area.

[0081] Optionally, the n COF gold finger groups comprise a first COF gold finger group (i.e., the gold fingers in COF1) and a second COF gold finger group (i.e., the gold fingers in COF2), the first COF gold finger group is located on the left side of the second COF gold finger group, the direction from the first COF gold finger group to the second COF gold finger group is a first direction, and the inclination angle is the included angle between the first direction and the gold fingers. Exemplarily, Figure 6 The included angle θ and the included angle α indicated in the above formula are the inclination angles, and the direction X is the first direction.

[0082] Optionally, the inclination angles of the plurality of COF gold fingers in the first COF gold finger group are within the range (0°, 90°), and the inclination angles of the plurality of COF gold fingers in the second COF gold finger group are within the range (90°, 180°) (as shown in the figure). Preferably, the inclination angles of the plurality of COF gold fingers in the first COF gold finger group are within the range [70°, 80°], and the inclination angles of the plurality of COF gold fingers in the second COF gold finger group are within the range [100°, 110°]. Figure 6

[0083] ​Optionally, the tilt angles of the plurality of COF gold fingers in the first COF gold finger group are within the range (90°, 180°), and the tilt angles of the plurality of COF gold fingers in the second COF gold finger group are within the range (0°, 90°). Figure 6 Preferably, the tilt angles of the plurality of COF gold fingers in the first COF gold finger group are within the range [100°, 110°], and the tilt angles of the plurality of COF gold fingers in the second COF gold finger group are within the range [70°, 80°].

[0084] That is, the tilt angles corresponding to the group-to-group of the first COF gold finger group and the second COF gold finger group are different.

[0085] Optionally, the tilt angles of the plurality of COF gold fingers in the first COF gold finger group are the same.

[0086] Optionally, the tilt angles of the plurality of COF gold fingers in the first COF gold finger group are different.

[0087] Optionally, the tilt angles of the plurality of COF gold fingers in the second COF gold finger group are the same.

[0088] Optionally, the tilt angles of the plurality of COF gold fingers in the second COF gold finger group are different.

[0089] It should be understood that in actual operation, the tilt angles of the plurality of COF gold fingers in one COF gold finger group can be the same, and the tilt angles of the plurality of COF gold fingers in another COF gold finger group can be different, which is not limited by the present application.

[0090] It should be understood that in actual operation, the tilt angles of some gold fingers in the same COF gold finger group can be the same, and the tilt angles of some gold fingers in the same COF gold finger group can be different, which is not limited by the present application.

[0091] It should be understood that if the tilt angles of the plurality of COF gold fingers in the first COF gold finger group are the same (for example, all θ), and the tilt angles of the plurality of COF gold fingers in the second COF gold finger group are the same (for example, all α), as shown in FIG. 1B. Figure 6 Optionally, the tilt angles of the gold finger group of COF1 can be complementary to the tilt angles of the gold finger group of COF2, that is, θ + α = 180°. Optionally, the tilt angles of the gold finger group of COF1 can not be complementary to the tilt angles of the gold finger group of COF2, that is, θ + α ≠ 180°.

[0092] Optionally, if the tilt angles of the plurality of COF gold fingers in the first COF gold finger group are different, the tilt angles of the plurality of COF gold fingers in the second COF gold finger group are different; and if the tilt angles of the plurality of COF gold fingers in the first COF gold finger group are within the range (0°, 90°), the tilt angles of the plurality of COF gold fingers in the second COF gold finger group are within the range (90°, 180°). Then, the tilt angles of the plurality of COF gold fingers in the first COF gold finger group gradually increase from left to right and gradually approach 90°, and the tilt angles of the plurality of COF gold fingers in the second COF gold finger group gradually increase from left to right and gradually deviate from 90°.

[0093] Optionally, if the tilt angles of the plurality of COF gold fingers in the first COF gold finger group are different, the tilt angles of the plurality of COF gold fingers in the second COF gold finger group are different; and if the tilt angles of the plurality of COF gold fingers in the first COF gold finger group are within the range (90°, 180°), the tilt angles of the plurality of COF gold fingers in the second COF gold finger group are within the range (0°, 90°). Then, the tilt angles of the plurality of COF gold fingers in the first COF gold finger group gradually decrease from left to right and gradually approach 90°, and the tilt angles of the plurality of COF gold fingers in the second COF gold finger group gradually decrease from left to right and gradually deviate from 90°.

[0094] In other words, the tilt angles of the plurality of COF gold fingers in one of the first COF gold finger group and the second COF gold finger group are within the range (0°, 90°), and the tilt angles of the plurality of COF gold fingers in the other COF gold finger group are within the range (90°, 180°). Then, the plurality of COF gold fingers in the first COF gold finger group gradually approach 90° from left to right, and the plurality of COF gold fingers in the second COF gold finger group gradually deviate from 90° from left to right.

[0095] It should be understood that, in actual operation, due to the influence of previous operation process and material expansion and contraction and other factors, when the multiple COFs are bound with the FPC, the cumulative tolerance chain is long, so that the TTP of the gold fingers on the FPC and the gold fingers on the multiple COFs is not equal, so that it is difficult to align. Moreover, for the multiple gold fingers on the FPC, the cumulative tolerance from the center to both sides is getting larger and larger, so that the offset of the corresponding COF gold finger is also getting larger and larger. Because the more the tilt angle of the gold finger deviates from 90°, the greater the component in the X direction when moving a certain distance in the Y direction; the closer the tilt angle of the gold finger to 90°, the smaller the component in the X direction when moving a certain distance in the Y direction. Therefore, when designing the gold finger, the tilt angle of the multiple gold fingers from the center to both sides should be gradually deviated from 90° as much as possible. So that when compensating for the gold finger with a long distance and large offset, the alignment of the gold finger with a short distance and small offset is not affected.

[0096] Therefore, in the embodiment of the present application, the tilt angle of the multiple COF gold fingers in one of the first COF gold finger group and the second COF gold finger group is within the range (0°, 90°), and the tilt angle of the multiple COF gold fingers in the other COF gold finger group is within the range (90°, 180°). Moreover, the multiple COF gold fingers in the first COF gold finger group gradually approach 90° from left to right, and the multiple COF gold fingers in the second COF gold finger group gradually deviate from 90° from left to right. Thus, the offset of the multiple COF gold fingers and the FPC gold fingers can be better compensated.

[0097] The tilt angle of the multiple gold fingers in the single COF gold finger group is the same or different will be illustrated by Figure 7 . Figure 7 is a design example of the tilt angle of the gold finger in a single COF provided by the embodiment of the present application. It should be understood that, Figure 7 is only an example and is not limited. It should be understood that, Figure 7 the COF shown is a left-biased COF in the multiple COFs, for example, it can be Figure 6 COF1 in . Because Figure 7 the tilt angle of the corresponding gold finger in from left to right gradually approaches 90°. It should be understood that, Figure 7 only two gold fingers are shown, but in actual operation, the number of gold fingers can be many, which is not limited by the present application.

[0098] Optionally, as Figure 7 shown, for a single COF, the angles of the multiple gold fingers in the corresponding gold finger group can be the same, that is, θ1=θ2. Optionally, if there are n gold fingers, θ1=θ2=θn.

[0099] Optionally, asFigure 7 As shown, the angles of the plurality of gold fingers in the corresponding gold finger group of a single COF can also be different, i.e. θ1≠θ2. Alternatively, if there are n gold finger groups, then θ1≠θ2≠θn.

[0100] It should be understood that the above description of the first and second COF gold finger groups can also be understood as a description of the design of the tilt angles of the gold fingers when there are two COFs.

[0101] Alternatively, the n COF gold finger groups can also include a third COF gold finger group (i.e. the gold fingers in COF3), i.e. there are three COFs, COF1, COF2 and COF3.

[0102] The following will be described with reference to the accompanying drawings. Figure 8 The design of the tilt angles of the gold fingers when there are three COFs will be described. It should be understood that the design of the tilt angles of the gold fingers when there are three COFs can also be understood as a description of the design of the tilt angles of the gold fingers when there are two COFs. Figure 8 The design of the tilt angles of the gold fingers and the number of gold fingers shown are merely examples and cannot constitute a limitation on the present application.

[0103] Alternatively, the third COF gold finger group is located to the right of the first COF gold finger group and to the left of the second COF gold finger group, and the tilt angles of the plurality of COF gold fingers in the third COF gold finger group are closer to 90° than the tilt angles of the plurality of COF gold fingers in the first and second COF gold finger groups.

[0104] Illustratively, if the tilt angles of the plurality of COF gold fingers in one of the first and second COF gold finger groups are within the range [70°, 80°], and the tilt angles of the plurality of COF gold fingers in the other COF gold finger group are within the range [100°, 110°], then the tilt angles of the plurality of COF gold fingers in the third COF gold finger group can be within the range (80°, 100°).

[0105] Alternatively, the tilt angles of the plurality of gold fingers in the third COF gold finger group are the same. Preferably, the tilt angles of the plurality of COF gold fingers in the third COF gold finger group are 90° or approximately 90°.

[0106] Alternatively, the tilt angles of the plurality of gold fingers in the third COF gold finger group are different.

[0107] Optionally, the tilt angles of the plurality of gold fingers in the third COF gold finger group are different. The tilt angles of the left half of the plurality of COF gold fingers in the third COF gold finger group gradually approach 90° from left to right; the tilt angles of the right half of the plurality of COF gold fingers in the third COF gold finger group gradually deviate from 90° from left to right. Thus, when the three COFs are taken as a whole, the tilt angles of the plurality of COF gold fingers in the first COF gold finger group and the left half of the plurality of COF gold fingers in the third COF gold finger group gradually approach 90° from left to right as a whole; the tilt angles of the right half of the plurality of COF gold fingers in the third COF gold finger group and the plurality of COF gold fingers in the second COF gold finger group gradually deviate from 90° from left to right as a whole.

[0108] In other words, when the three COFs are taken as a whole, the tilt angles of all the gold fingers to the left of the center position of the plurality of gold fingers in the third COF gold finger group gradually approach 90° from left to right; the tilt angles of all the gold fingers to the right of the center position of the plurality of gold fingers in the third COF gold finger group gradually deviate from 90° from left to right.

[0109] It should be understood that when the three COFs are taken as a whole, the tilt angles of all the COF gold fingers included therein gradually increase or decrease from left to right. For example, if the tilt angles of the gold fingers in the left half of the COF are all less than 90°, and the tilt angles of the gold fingers in the right half of the COF are all greater than 90°, then the tilt angles of all the COF gold fingers included in the three COFs gradually increase from left to right; if the tilt angles of the gold fingers in the left half of the COF are all greater than 90°, and the tilt angles of the gold fingers in the right half of the COF are all less than 90°, then the tilt angles of all the COF gold fingers included in the three COFs gradually decrease from left to right.

[0110] That is, it means that the corresponding tilt angles of the groups of the first COF gold finger group, the second COF gold finger group, and the third COF gold finger group are different.

[0111] It should be understood that in the three COFs, the tilt angles of the plurality of COF gold fingers in some COF gold finger groups can be the same, and the tilt angles of the plurality of COF gold fingers in some COF gold finger groups can be different, which is not limited in the present application.

[0112] Optionally, the n COF gold finger groups can further include a fourth COF gold finger group and a fifth COF gold finger group. The fourth COF gold finger group can be located to the left of the first COF gold finger group, and the fifth COF gold finger group can be located to the right of the second COF gold finger group.

[0113] It should be understood that the n COF gold finger groups, when including the fourth COF gold finger group and the fifth COF gold finger group, can include a third COF gold finger group between the first COF gold finger group and the second COF gold finger group, that is, a total of 5 COFs, or can not include a third COF gold finger group between the first COF gold finger group and the second COF gold finger group, that is, a total of 4 COFs, which is not limited in the present application.

[0114] For the convenience of description, in the following description, the inclination angle design of the gold fingers when there are 4 COFs is described by taking the third COF gold finger group as an example.

[0115] Optionally, the inclination angles of the plurality of COF gold fingers in the fourth COF gold finger group are more deviated from 90° than the inclination angles of the plurality of COF gold fingers in the first COF gold finger group, and the inclination angles of the plurality of COF gold fingers in the fifth COF gold finger group are more deviated from 90° than the inclination angles of the plurality of COF gold fingers in the second COF gold finger group.

[0116] Exemplarily, if the inclination angles of the plurality of COF gold fingers in the first COF gold finger group are within the range (0°, 90°), the inclination angles of the plurality of COF gold fingers in the fourth COF gold finger group are also within the range (0°, 90°), and the inclination angles of the plurality of COF gold fingers in the fourth COF gold finger group are more deviated from 90° than the inclination angles of the plurality of COF gold fingers in the first COF gold finger group, that is, the inclination angles of the plurality of COF gold fingers in the fourth COF gold finger group are smaller than the inclination angles of the plurality of COF gold fingers in the first COF gold finger group.

[0117] Optionally, the inclination angles of the plurality of COF gold fingers in the fourth COF gold finger group are the same.

[0118] Optionally, the inclination angles of the plurality of COF gold fingers in the fifth COF gold finger group are the same.

[0119] Optionally, the inclination angles of the plurality of COF gold fingers in the fourth COF gold finger group are different.

[0120] Optionally, the inclination angles of the plurality of COF gold fingers in the fifth COF gold finger group are different.

[0121] Optionally, the plurality of gold fingers in the fourth COF gold finger group gradually approach 90° from left to right.

[0122] Optionally, the plurality of gold fingers in the fifth COF gold finger group gradually deviate from 90° from left to right.

[0123] It should be understood that, as a whole, the tilt angles of all the COF gold fingers corresponding to the fourth COF gold finger group and the first COF gold finger group gradually approach 90° from left to right; the tilt angles of all the COF gold fingers corresponding to the second COF gold finger group and the fifth COF gold finger group gradually deviate from 90° from left to right.

[0124] It should be understood that, as a whole, the tilt angles of all the COF gold fingers included in the four COFs gradually increase or decrease from left to right. For example, if the tilt angles of the gold fingers in the left two COFs are both less than 90°, and the tilt angles of the gold fingers in the right two COFs are both greater than 90°, then the tilt angles of all the COF gold fingers included in the four COFs gradually increase from left to right; if the tilt angles of the gold fingers in the left two COFs are both greater than 90°, and the tilt angles of the gold fingers in the right two COFs are both less than 90°, then the tilt angles of all the COF gold fingers included in the four COFs gradually decrease from left to right.

[0125] It can be seen that the tilt angles corresponding to the groups of the first COF gold finger group, the second COF gold finger group, the fourth COF gold finger group, and the fifth COF gold finger group are different between groups.

[0126] It should be understood that, in actual operation, the tilt angles of the multiple COF gold fingers in some COF gold finger groups can be the same, and the tilt angles of the multiple COF gold fingers in some COF gold finger groups can be different, which is not limited by the present application.

[0127] The above is an example of the design of the tilt angles of the gold fingers when there are 2, 3, and 4 COFs. By analogy, more designs can be derived from the tilt angle designs of the above examples, such as the tilt angle designs of 5 COFs, 6 COFs, n COFs, etc.

[0128] From the above description, the tilt angle designs of the gold fingers when there are n COFs are as follows:

[0129] If n is odd, the tilt angle design when there are 3 COFs can be referred to as described above. If n is even, the tilt angle designs when there are 2 and 4 COFs can be referred to as described above.

[0130] It should be understood that, when there are n COFs, the tilt angles between COF groups are different. The tilt angles of the multiple gold fingers in a single COF group can be the same or different.

[0131] The tilt angle design when there are n COF gold finger groups is described below.

[0132] Example 1: If n is odd, and the tilt angles of the plurality of COF gold fingers in each group are the same. Then, in the unit of group, the tilt angle of the COF group in the middle is 90° or close to 90°; the tilt angles of each COF group on the left side gradually approach 90° from left to right; the tilt angles of each COF group on the right side gradually deviate from 90° from left to right. And the tilt angles of the n groups as a whole gradually increase or decrease from left to right in the unit of group.

[0133] Example 2: If n is even, and the tilt angles of the plurality of COF gold fingers in each group are the same. Then, in the unit of group, the tilt angles of each COF group on the left side gradually approach 90° from left to right; the tilt angles of each COF group on the right side gradually deviate from 90° from left to right. And the tilt angles of the n groups as a whole gradually increase or decrease from left to right in the unit of group.

[0134] Example 3: If n is odd, and the tilt angles of the plurality of COF gold fingers in each group are different. Then, in the unit of gold finger, the tilt angles of all the COF gold fingers to the left of the center position in the middle COF group gradually approach 90° from left to right; the tilt angles of all the COF gold fingers to the right gradually deviate from 90° from left to right, and the tilt angles of all the COF gold fingers as a whole gradually increase or decrease from left to right.

[0135] Example 4: If n is even, and the tilt angles of the plurality of COF gold fingers in each group are different. Then, in the unit of gold finger, the tilt angles of all the COF gold fingers corresponding to the left half of the COF group gradually approach 90° from left to right; the tilt angles of all the COF gold fingers corresponding to the right half gradually deviate from 90° from left to right, and the tilt angles of all the COF gold fingers as a whole gradually increase or decrease from left to right.

[0136] It should be understood that the above examples are only an implementation manner and cannot constitute a limitation on the present application. In actual operation, the design of the tilt angle can also be determined according to actual conditions, which is not limited.

[0137] Optionally, the display module 600 can further include n integrated circuits (ICs), and the n ICs are respectively packaged on the n COFs.

[0138] Optionally, the display module 600 can further include a display screen, and the display screen is bound to the n COFs through the gold fingers.

[0139] It should be understood that in actual operation, the display screen can exist independently from the display module 600, instead of being included in the display module 600, which is not limited in the present application.

[0140] In the embodiments of the present application, the gold fingers of the plurality of COFs and the FPC adopt an inclined design, so that when the total pitch TTP of the gold fingers on the FPC and the plurality of COFs in the X direction has a deviation, adjustment in the X and Y directions can be performed at the same time, wherein when adjustment is performed in the Y direction, since a component in the X direction will be generated, and opposite components can be generated on the left and right sides, so that the deviation in the X direction can be compensated, avoiding the occurrence of short circuit or open circuit in the FOF binding process, thereby improving the yield and reliability of the FOF binding process, and reducing the scrap rate of products or materials in the preparation process.

[0141] The following will be described in detail with reference to the accompanying drawings. Figure 9 The offset compensation process of the present application is illustrated.

[0142] Figure 9 is an example diagram of an offset compensation process provided by the embodiments of the present application. It should be understood that, Figure 9 (a) in is an example diagram before offset compensation; Figure 9 (b) in is an example diagram after offset compensation; Figure 9 (c) in is an enlarged design example diagram of the FOF binding area in (a) and separately extracts the gold fingers; Figure 9 (d) in is an enlarged design example diagram of the FOF binding area in (b) and separately extracts the gold fingers.

[0143] As an example but not limitation, in Figure 9 , the display module includes 2 COFs (COF1 and COF2). The FPC and the COFs adopt an inclined gold finger design in the FOF binding area, and the gold fingers in different COFs correspond to different inclination angles, and the inclination angles of the plurality of gold fingers in the same COF are the same. Among them, the inclination angle of the gold fingers in COF1 is 70°, and the inclination angle of the gold fingers in COF2 is 110°. Among them, the inclination angle is the angle between the gold finger and the horizontal direction (i.e. the transverse direction).

[0144] From (a) and (c) in Figure 9 , it can be seen that since the horizontal direction offsets of the two COFs are opposite, there is a risk of short circuit or open circuit between the gold fingers of the COFs and the gold fingers of the FPC during the lapping process. At this time, by adopting the inclined gold finger design in the present application, in addition to the conventional X direction adjustment to compensate for the offset in the same direction, Y direction adjustment can also be used to compensate, so that the gold fingers of COF1, COF2 and FPC can be well aligned one by one, as shown in (b) and (d) in Figure 9 .

[0145] Specifically, in the alignment process, the inclined gold finger design makes the X direction (lateral) component when the relative position of the multiple COFs and FPCs is moved in the Y direction (longitudinal). For example, the COF1 in the embodiment has an inclination angle of 70°, and when it is moved 100 um in the Y direction, it makes the X direction relative movement of 100 um*cot70°, that is, it moves to the right; the COF2 has an inclination angle of 110°, and when it is moved 100 um in the Y direction, it makes the X direction relative movement of 100 um*cot110°, that is, it moves to the left. Thus, the X direction deviation of the COF1 and COF2 can be compensated.

[0146] In the embodiment of the present application, the gold fingers of the multiple COFs and FPCs are designed to be inclined, so that in the alignment process, the X and Y directions can be controlled at the same time, thereby compensating for the X direction deviation of the COF1 and COF2, realizing one-to-one alignment of the gold fingers of the COF and FPC, and avoiding the problems of short circuit or open circuit in the FOF binding process.

[0147] Figure 10 FIG. 1 is an example diagram of an electronic device provided by an embodiment of the present application. As shown in the figure, the electronic device 1000 includes a display module 1010. Figure 10

[0148] The electronic device 1000 can be a mobile phone, a computer, a tablet computer, a television, or other devices that need to use a display module, and the present application is not limited thereto. It should be understood that the display module can be the display module 100 or 600 described above.

[0149] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.​

Claims

1. A display module, applied to electronic devices with high wiring density and high gold finger density, characterized in that, include: n flip-chip COF and flexible circuit board FPC, n≥2; Wherein, the n COFs include n COF gold finger groups, the FPCs include n FPC gold finger groups, each COF gold finger group in the n COF gold finger groups includes multiple COF gold fingers, each FPC gold finger group in the n FPC gold finger groups includes multiple FPC gold fingers, the COF gold fingers and the FPC gold fingers correspond one-to-one, and the tilt angle of the COF gold fingers and the corresponding FPC gold fingers is the same; The n COF gold finger groups include a first COF gold finger group and a second COF gold finger group. The first COF gold finger group is located to the left of the second COF gold finger group. The direction from the first COF gold finger group to the second COF gold finger group is a first direction. The tilt angle is the angle between the first direction and the gold finger. The tilt angle is configured such that when the total spacing of the gold fingers of the n COFs does not match the total spacing of the gold fingers of the FPC due to cumulative tolerance, the lateral misalignment in the first direction is compensated by longitudinal relative movement between the FPC and the n COFs perpendicular to the first direction. The tilt angles of multiple COF gold fingers in the first COF gold finger group are within the range (0°, 90°), and the tilt angles of multiple COF gold fingers in the second COF gold finger group are within the range (90°, 180°). Alternatively... The tilt angles of multiple COF gold fingers in the first COF gold finger group are within the range of (90°, 180°), and the tilt angles of multiple COF gold fingers in the second COF gold finger group are within the range of (0°, 90°). If the tilt angles of multiple COF gold fingers in the first COF gold finger group are different; and the tilt angles of multiple COF gold fingers in the second COF gold finger group are different, then the tilt angles of multiple COF gold fingers in the first COF gold finger group and the second COF gold finger group gradually deviate from the center to both sides by 90°, so that while compensating for gold fingers that are far away and have large deviations, the alignment of gold fingers that are close away and have small deviations is not affected.

2. The display module according to claim 1, characterized in that, The tilt angles of multiple COF gold fingers in the first COF gold finger group are the same; the tilt angles of multiple COF gold fingers in the second COF gold finger group are the same.

3. The display module according to claim 1, characterized in that, If the tilt angles of multiple COF gold fingers in the first COF gold finger group are within the range (0°, 90°), and the tilt angles of multiple COF gold fingers in the second COF gold finger group are within the range (90°, 180°), then the tilt angles of multiple COF gold fingers in the first and second COF gold finger groups gradually deviate from the center to both sides by 90°, including: The tilt angles of the multiple COF gold fingers in the first COF gold finger group increase sequentially from left to right and gradually approach 90°, while the tilt angles of the multiple COF gold fingers in the second COF gold finger group increase sequentially from left to right and gradually deviate from 90°.

4. The display module according to claim 1, characterized in that, If the tilt angles of multiple COF gold fingers in the first COF gold finger group are within the range (90°, 180°), and the tilt angles of multiple COF gold fingers in the second COF gold finger group are within the range (0°, 90°), then the tilt angles of multiple COF gold fingers in the first and second COF gold finger groups gradually deviate from the center to both sides by 90°, including: The tilt angles of the multiple COF gold fingers in the first COF gold finger group decrease sequentially from left to right and gradually approach 90°, while the tilt angles of the multiple COF gold fingers in the second COF gold finger group decrease sequentially from left to right and gradually deviate from 90°.

5. The display module according to any one of claims 1 to 4, characterized in that, The tilt angles of multiple COF gold fingers in the first COF gold finger group are within the range of [70°, 80°], and the tilt angles of multiple COF gold fingers in the second COF gold finger group are within the range of [100°, 110°]. Alternatively, the tilt angles of multiple COF gold fingers in the first COF gold finger group are within the range of [100°, 110°], and the tilt angles of multiple COF gold fingers in the second COF gold finger group are within the range of [70°, 80°].

6. The display module according to any one of claims 1 to 4, characterized in that, The n COF gold finger groups also include a third COF gold finger group, which is located to the right of the first COF gold finger group and to the left of the second COF gold finger group. The tilt angle of multiple COF gold fingers in the third COF gold finger group is closer to 90° than the tilt angle of multiple COF gold fingers in the first COF gold finger group and the second COF gold finger group.

7. The display module according to any one of claims 1 to 4, characterized in that, The n COF gold finger groups also include a fourth COF gold finger group and a fifth COF gold finger group. The fourth COF gold finger group is located to the left of the first COF gold finger group, and the fifth COF gold finger group is located to the right of the second COF gold finger group. The tilt angle of multiple COF gold fingers in the fourth COF gold finger group is 90° more deviated than the tilt angle of multiple COF gold fingers in the first COF gold finger group, and the tilt angle of multiple COF gold fingers in the fifth COF gold finger group is 90° more deviated than the tilt angle of multiple COF gold fingers in the second COF gold finger group.

8. The display module according to claim 5, characterized in that, The n COF gold finger groups also include a fourth COF gold finger group and a fifth COF gold finger group. The fourth COF gold finger group is located to the left of the first COF gold finger group, and the fifth COF gold finger group is located to the right of the second COF gold finger group. The tilt angle of multiple COF gold fingers in the fourth COF gold finger group is 90° more deviated than the tilt angle of multiple COF gold fingers in the first COF gold finger group, and the tilt angle of multiple COF gold fingers in the fifth COF gold finger group is 90° more deviated than the tilt angle of multiple COF gold fingers in the second COF gold finger group.

9. The display module according to claim 6, characterized in that, The n COF gold finger groups also include a fourth COF gold finger group and a fifth COF gold finger group. The fourth COF gold finger group is located to the left of the first COF gold finger group, and the fifth COF gold finger group is located to the right of the second COF gold finger group. The tilt angle of multiple COF gold fingers in the fourth COF gold finger group is 90° more deviated than the tilt angle of multiple COF gold fingers in the first COF gold finger group, and the tilt angle of multiple COF gold fingers in the fifth COF gold finger group is 90° more deviated than the tilt angle of multiple COF gold fingers in the second COF gold finger group.

10. The display module according to any one of claims 1 to 4, characterized in that, The display module further includes n integrated circuits (ICs), which are respectively packaged on the n COFs.

11. The display module according to claim 5, characterized in that, The display module further includes n integrated circuits (ICs), which are respectively packaged on the n COFs.

12. The display module according to claim 6, characterized in that, The display module further includes n integrated circuits (ICs), which are respectively packaged on the n COFs.

13. The display module according to claim 7, characterized in that, The display module further includes n integrated circuits (ICs), which are respectively packaged on the n COFs.

14. The display module according to any one of claims 8 to 9, characterized in that, The display module further includes n integrated circuits (ICs), which are respectively packaged on the n COFs.

15. The display module according to any one of claims 1 to 4, characterized in that, The display module further includes a display screen, which is bound to the n COFs via gold fingers.

16. The display module according to claim 5, characterized in that, The display module further includes a display screen, which is bound to the n COFs via gold fingers.

17. The display module according to claim 6, characterized in that, The display module further includes a display screen, which is bound to the n COFs via gold fingers.

18. The display module according to claim 7, characterized in that, The display module further includes a display screen, which is bound to the n COFs via gold fingers.

19. The display module according to any one of claims 8 to 9, characterized in that, The display module further includes a display screen, which is bound to the n COFs via gold fingers.

20. The display module according to claim 10, characterized in that, The display module further includes a display screen, which is bound to the n COFs via gold fingers.

21. The display module according to any one of claims 11 to 13, characterized in that, The display module further includes a display screen, which is bound to the n COFs via gold fingers.

22. The display module according to claim 14, characterized in that, The display module further includes a display screen, which is bound to the n COFs via gold fingers.

23. An electronic device, characterized in that, Includes the display module as described in any one of claims 1 to 22.

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