Flexible printed circuit, display module, and display apparatus

Abstract

The present disclosure relates to a flexible printed circuit used for binding and connecting to a display panel, the display panel comprising a display area, and a first binding area located on one side of the display area in a first direction, the first binding area being provided with a drive IC; the flexible printed circuit comprises a main body, and in the first direction, a first extension portion is provided on one side of the main body, the first extension portion comprising a second binding area and an extension area, the second binding area being used for binding and connecting to the first binding area, and the extension area being located on the side of the second binding area away from the main body; the extension area is provided with a hollowed-out pattern, and a first trace for providing a signal for the display panel, and the hollowed-out pattern is configured to allow the drive IC to pass through. The present disclosure further relates to a display module and a display apparatus.

Description

Flexible circuit board, display module and display device

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 202411045934.7, filed on July 31, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of display product manufacturing, and in particular to a flexible circuit board, a display module and a display device. BACKGROUND

[0004] With the rapid development of consumer electronics, the integration of touch screens is becoming higher and higher, the requirement for battery endurance is becoming higher and higher, and the space required by the battery is larger. The Y-direction assembly inside the whole machine is generally designed in three sections, that is, the uppermost is the mainboard, the middle is the battery, and the lower is the screen module. When there is no optimization space for the mainboard, the space requirement of the battery increases, which requires the Y-direction size of the screen module FPCB to be narrow enough. At the same time, the connection of the control signal of the screen and the mainboard of the whole machine needs to be made through the neck area of the FPC, and the X-direction space of the neck area of the FPC of the whole machine will also be reduced. SUMMARY

[0005] In order to solve the above technical problems, the present disclosure provides a flexible circuit board, a display module and a display device, which solve the problem that the Y-direction size of the flexible circuit board is limited and cannot meet the space requirement of the battery.

[0006] In order to achieve the above purpose, the technical scheme adopted by the embodiments of the present disclosure is: a flexible circuit board, used for binding connection with a display panel, the display panel comprising a display area and a first binding area located on one side of the display area in a first direction, the first binding area being provided with a driving IC;

[0007] The flexible circuit board comprises a main body, in the first direction, one side of the main body is provided with a first extension, the first extension comprises a second binding area and an extension area, the second binding area is used for binding connection with the first binding area, and the extension area is located on the side of the second binding area away from the main body;

[0008] The extension area is provided with a hollow pattern and a first circuit for providing a signal for the display panel, the hollow pattern is configured to pass through the driving IC.

[0009] Optionally, the second binding area is provided with a plurality of binding terminals, the plurality of binding terminals include a first power terminal and a second power terminal arranged at intervals, the first circuit includes a first power line for transmitting a first power signal, the first power line includes a first sub-power line and a second sub-power line;

[0010] The first sub-power line includes a first sub-portion, a second sub-portion and a third sub-portion connected in sequence, the first sub-portion and the third sub-portion are located on opposite sides of the hollow pattern in a second direction, the second sub-portion is located on a side of the hollow pattern away from the main body in the first direction, and an end of the first sub-portion away from the second sub-portion is connected to the first power terminal, and an end of the third sub-portion away from the second sub-portion is connected to the second power terminal, the second direction is arranged perpendicular to the first direction;

[0011] One end of the second sub-power line is connected to the second power terminal, and the other end of the second sub-power line extends towards the main body.

[0012] Optionally, the second binding area is provided with a plurality of binding terminals, the plurality of binding terminals include a first touch terminal and a second touch terminal arranged at intervals;

[0013] The first circuit includes a first touch trace and a second touch trace;

[0014] One end of the first touch trace is connected to the first touch terminal, and the other end of the first touch trace extends towards the main body;

[0015] The second touch trace includes a fourth sub-portion, a fifth sub-portion and a sixth sub-portion connected in sequence, the fourth sub-portion and the sixth sub-portion are located on opposite sides of the hollow pattern in a second direction, the fifth sub-portion is located on a side of the hollow pattern away from the main body in the first direction, and an end of the fourth sub-portion away from the fifth sub-portion is connected to the second touch terminal, and an end of the sixth sub-portion away from the fifth sub-portion extends towards the second binding area, the second direction is arranged perpendicular to the first direction.

[0016] Optionally, a second extension portion away from the main body in the first direction is further included, and a connector connected to an external device is arranged at an end of the second extension portion away from the main body.

[0017] Optionally, the extending direction of the second extending part is parallel to the first direction, the second extending part comprises at least a first trace layer and a second trace layer, and a plurality of traces extending along the extending direction of the second extending part are arranged on the second extending part, wherein the plurality of traces comprise at least a first trace, the first trace comprises a first part arranged on the first trace layer and a second part arranged on the second trace layer, and a projection of the first part on the second trace layer at least partially overlaps the second part.

[0018] Optionally, the main body comprises a first substrate layer, a third trace layer and a fourth trace layer arranged on opposite sides of the first substrate layer.

[0019] The side of the third trace layer away from the first substrate layer is sequentially stacked with an insulating layer and an electromagnetic shielding layer.

[0020] The side of the fourth trace layer away from the first substrate layer is sequentially stacked with an insulating layer and an electromagnetic shielding layer.

[0021] Optionally, the first extending part is a single-layer plate structure, and the first extending part comprises a second substrate layer arranged in the same layer as the first substrate layer and a fifth trace layer arranged in the same layer as the third trace layer.

[0022] Optionally, the stack structure of the second extending part is the same as that of the main body, and in a second direction perpendicular to the first direction, the width of the second extending part is smaller than the width of the main body.

[0023] The embodiments of the present disclosure further provide a display module comprising a display panel and the flexible circuit board.

[0024] Optionally, a first protective adhesive layer is arranged between the extending area and the display panel, and in the first direction, the protective adhesive layer is arranged on the side of the driving IC away from the first binding area.

[0025] Optionally, a second protective adhesive layer is arranged on the side of the first extending part away from the display panel, one end of the second protective adhesive layer is arranged on the end of the first extending part away from the main body, and the other end of the second protective adhesive layer crosses the driving IC and is lapped on the main body.

[0026] The embodiments of the present disclosure further provide a display device comprising the display module.

[0027] The beneficial effects of the present disclosure are: the flexible circuit board provided by the present disclosure comprises a main body, and a first extension is arranged on one side of the main body in a first direction, the first extension comprises a second binding area and an extension area, the second binding area is used for binding connection with the first binding area, and the extension area is located on the side of the second binding area away from the main body; compared with the prior art, after the flexible circuit board is bound and connected with the display panel, the extension area is additionally arranged on the flexible circuit board, the first circuit arranged on the second binding area in the related art is arranged in the extension area, the size of the second binding area in the first direction is reduced, and then the overall size of the flexible circuit board in the first direction is reduced, thereby providing more space for accommodating the battery. BRIEF DESCRIPTION OF DRAWINGS

[0028] FIG. 1 shows a schematic diagram of a display module in the related art;

[0029] FIG. 2 shows a schematic diagram of a display module in the related art;

[0030] FIG. 3 shows a schematic diagram of a display module in the related art;

[0031] FIG. 4 shows a schematic diagram of a flexible circuit board in the related art;

[0032] FIG. 5 shows a schematic diagram of a flexible circuit board in an embodiment of the present disclosure;

[0033] FIG. 6 shows a schematic diagram of a first trace in the second extension;

[0034] FIG. 7 shows a schematic diagram of a first trace in the second extension;

[0035] FIG. 8 is a schematic diagram of a display module in an embodiment of the present disclosure;

[0036] FIG. 9 is a schematic diagram of a display module in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without any inventive effort fall within the protection scope of the present disclosure.

[0038] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the meanings as understood by a person of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", and similar terms are used herein merely to distinguish one element from another, and are not intended to imply any order or importance. Similarly, the terms "one", "a", or "the" are not limited to one instance, but rather are used to indicate at least one. The terms "including" and "comprising" and similar terms are used herein to mean that the elements or objects following the term are included or encompassed, but not limited to, the elements or objects listed after the term. The term "connected" or "coupled" or similar terms are used herein to mean that the connected or coupled elements or objects are in direct or indirect contact with each other, and are not necessarily directly connected or coupled to each other. The terms "upper", "lower", "left", "right", and the like are used herein merely to represent relative positional relationships, and can be changed when the absolute positions of the described objects are changed.

[0039] The terms "parallel", "perpendicular", and "same" used in the embodiments of the present disclosure include the strict "parallel", "perpendicular", "same" and the "approximately parallel", "approximately perpendicular", "approximately same" with a certain tolerance, which, considering the measurement and the tolerance related to the measurement of a specific value (for example, the limitation of a measurement system), represents the acceptable deviation range for the specific value determined by a person of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within 3% or 5% of the value.

[0040] FIGS. 1 and 2 are schematic diagrams of a binding connection of a display panel 100 and a flexible printed circuit (FPC) 200 in the related art, and FIG. 3 is a schematic diagram of a reverse binding of the FPC 200.

[0041] In order to provide more space for the battery 300, there are generally two FPC size reduction schemes in the related art: increasing the number of layers and borrowing space. Table 1 below shows the cost and structural details of various schemes. The scheme of increasing the number of layers has obvious disadvantages, such as increased thickness and cost. As for the scheme of borrowing space, referring to FIGS. 2 and 3, the maximum reduction of the Y-direction width can be achieved, but the pad area thickness increases, and based on the existing conventional binding, equipment modification investment is required, greatly increasing the cost.

[0042] Table 1

[0043] Referring to FIGS. 5-9, to solve the above problems, the present embodiment provides a flexible printed circuit for binding connection with a display panel, the display panel comprising a display area and a first binding area located on one side of the display area in a first direction, the first binding area being provided with a driving IC 201;

[0044] The flexible circuit board includes a main body 13, one side of the main body 13 is provided with a first extension in the first direction, the first extension includes a second binding area 14 and an extension area 15, the second binding area 14 is used for binding connection with the first binding area, and the extension area 15 is located away from one side of the main body 13;

[0045] The extension area 15 is provided with a hollow pattern 109 and a first circuit for transmitting signals of a display panel, and the hollow pattern 109 is configured to pass through the driving IC 201.

[0046] It should be noted that the first circuit can be a power signal line (refer to the first sub-power line 101 in FIG. 5) for transmitting a power signal, or a touch signal line (refer to the second touch trace 104 in FIG. 5) for transmitting a touch signal, as long as it is originally arranged in the second binding area, and can be arranged in the extension area from the second binding area to reduce the size of the second binding area in the first direction, thereby reducing the size of the flexible circuit board in the first direction.

[0047] The flexible circuit board in the embodiment adds the extension area 15 relative to the prior art. When the flexible circuit board is bound in the display panel and not bent to the back of the display panel, the newly added extension area 15 does not increase the size of the display area AA of the display module pointing to the direction of the flexible circuit board (i.e. the first direction) due to the overlap between the extension area 15 and the first binding area of the display panel. By arranging the hollow pattern 109 in the extension area 15, an avoiding space is provided for the driving IC 201 on the display panel. When the flexible circuit board is bound and connected with the display panel, the driving IC 201 can be arranged through the hollow pattern 109, ensuring the normal electrical connection between the driving IC 201 and the first binding area of the display panel.

[0048] Arranging the first circuit originally arranged in the second binding area 14 in the extension area 15 can greatly reduce the design space of the second binding area 14, reduce the size of the second binding area 14 in the first direction, and reduce the size of the flexible circuit board in the first direction, thereby providing more space for accommodating the battery.

[0049] In an exemplary embodiment, the second binding area 14 is provided with a plurality of binding terminals, the plurality of binding terminals include a first power terminal 105 and a second power terminal 106 arranged at intervals, the first circuit includes a first power line for transmitting a first power signal, and the first power line includes a first sub-power line 101 and a second sub-power line 102.

[0050] The first sub power line 101 comprises a first sub part, a second sub part and a third sub part connected in sequence, the first sub part and the third sub part are respectively located on opposite sides of the hollow pattern in the second direction, the second sub part is located on the side of the hollow pattern away from the main body in the first direction, and the end of the first sub part away from the second sub part is connected to the first power terminal 105, and the end of the third sub part away from the second sub part is connected to the second power terminal 106, and the second direction is arranged perpendicular to the first direction;

[0051] One end of the second sub power line 102 is connected to the second power terminal 106, and the other end of the second sub power line 102 extends towards the main body 13.

[0052] For example, the first line can be an ELVDD signal line and / or an ELVSS signal line.

[0053] Fig. 4 is a schematic diagram of a flexible circuit board in the related art. Fig. 5 is a schematic diagram of a flexible circuit board in the present embodiment. The routing manner of the ELVSS signal line (green signal line) and the ELVDD signal line (blue signal line) is substantially the same. Taking the ELVSS signal line as an example, in Fig. 4, two ELVSS terminals are arranged at intervals in the plurality of binding terminals on the flexible circuit board, and the signal lines led out from the two ELVSS terminals are both extended to the second extension part 16 via the second binding area 14 of the flexible circuit board. In Fig. 5, the ELVSS signal line is divided into a first sub-power line 101 and a second sub-power line 102, one end of the first sub-power line 101 is connected with the first power terminal 105, the other end of the first sub-power line 101 extends to the second sub-area, bypasses the hollow pattern, and is connected with the second power terminal 106. Specifically, the first sub-power line 101 comprises a first sub-part a, a second sub-part b and a third sub-part c connected in sequence, the first sub-part a and the third sub-part c are respectively located on opposite sides of the hollow pattern in the second direction (perpendicular to the first direction), one end of the first sub-part a is connected with the first power terminal 105, the other end of the first sub-part a extends in a direction away from the main body 1, one end of the third sub-part c is connected with the second power terminal 106, the other end of the third sub-part c extends in a direction away from the main body, the second sub-part b is located between the first sub-part a and the second sub-part b, and the second sub-part b is located on a side of the hollow pattern away from the main body (it should be noted that a dashed line is provided in Fig. 5 to distinguish the first sub-part a, the second sub-part b and the third sub-part c, but in fact, the dashed line does not exist, and the first sub-power line 101 is an integral structure); one end of the second sub-power line 102 is connected with the second power terminal 106, and the other end of the second sub-power line 102 extends to the main body 13. That is, compared with the conventional technology, the part of the ELVSS signal line occupying the space of the first binding area in the first direction is transferred to the extension area 15, the size of the first binding area in the first direction is reduced, the size of the flexible circuit board in the first direction is reduced, and more space can be provided for accommodating the battery.

[0054] For example, in the first direction, a second extension 16 is provided on the side of the main body 13 away from the first extension. The second extension 16 extends along the first direction, and a connector 17 is provided at the end of the second extension 16 away from the area of ​​the main body 13. A protective device 12 is provided on the area of ​​the main body 13. The second extension 16 is located on one side of the main body 13 in a second direction perpendicular to the first direction. To facilitate wiring, the protective device 12 is provided on the side of the main body 13 near the second extension 16 in the second direction perpendicular to the first direction. The other end of the second sub-power line 102 is connected in series to the protective device 12, and then connected to the connector 17 via a connecting line connecting the protective device 12 and the connector 17.

[0055] In an exemplary embodiment, the second binding area 14 is provided with a plurality of binding terminals, the plurality of binding terminals including a first touch terminal 107 and a second touch terminal 108 arranged at intervals;

[0056] The first line includes a first touch trace 103 and a second touch trace 104;

[0057] One end of the first touch line 103 is connected to the first touch terminal 107, and the other end of the first touch line 103 extends toward the main body 13;

[0058] One end of the second touch trace 104 is connected to the second touch terminal 108, and the other end of the second touch trace 104 extends toward the extension area 15, bypasses the hollow pattern 109, and extends toward the second binding area 14. Specifically, the second touch trace 104 includes a fourth sub-part, a fifth sub-part, and a sixth sub-part connected in sequence. The fourth sub-part and the sixth sub-part are respectively located on opposite sides of the hollow pattern in the second direction. The fifth sub-part is located on the side of the hollow pattern away from the main body in the first direction. The end of the fourth sub-part away from the fifth sub-part is connected to the second touch terminal 108, and the end of the sixth sub-part away from the fifth sub-part extends toward the second binding area. The second direction is perpendicular to the first direction.

[0059] Referring to FIG. 4 and FIG. 5, in FIG. 4, the purple signal line is a touch signal line, a touch IC 11 is arranged on the flexible circuit board, the touch signal line includes a first touch signal line and a second touch signal line, a plurality of binding terminals include a first touch terminal 107 and a second touch terminal 108 arranged at intervals, a first touch trace 103 is led out from the first touch terminal 107 and connected to the touch IC 11, and a second touch trace 104 is led out from the second touch terminal 108 and connected to the touch IC 11. In FIG. 5, in the embodiment, the second touch trace 104 far away from the touch IC 11 is arranged in the extension area 15, specifically, the second touch trace 104 includes a fourth sub-part e, a fifth sub-part f and a sixth sub-part g connected in sequence, the fourth sub-part e and the sixth sub-part g are respectively located on opposite sides of the hollow pattern in the second direction, the fifth sub-part f is located on a side of the hollow pattern away from the main body in the first direction, and an end of the fourth sub-part e away from the fifth sub-part f is connected to the second touch terminal 108, an end of the sixth sub-part g away from the fifth sub-part f extends and is arranged towards the second binding area 14, and the second direction is arranged perpendicular to the first direction (it should be noted that a dashed line is arranged in FIG. 5 to distinguish the fourth sub-part e, the fifth sub-part f and the sixth sub-part g, but in fact the dashed line does not exist, and the second touch trace is a whole structure). That is, compared with the prior art, the part of the touch signal line occupying the space of the first binding area in the first direction is transferred to the extension area 15, the size of the first binding area in the first direction is reduced, the size of the flexible circuit board in the first direction is reduced, and more space can be provided for accommodating the battery.

[0060] For example, in order to facilitate wiring arrangement, the second touch trace 104 is located at the periphery of the first sub-power line 101.

[0061] For example, the first line includes at least one of the first power line and the touch signal line, so as to reduce the size of the flexible circuit board in the first direction.

[0062] In some embodiments, the first line includes the first power line and the touch signal line, and the first power line includes an ELVDD signal line and an ELVSS signal line. This embodiment case is parallel to the EL voltage (ELVDD and ELVSS) in the extension area 15; and for the touch signal line, it is also led out from the extension area 15 to the touch IC 11. The signal trace rule of the FPC (flexible circuit board) is: the default line space NOR Line Space is A, the default line width NOR Line Width is B, the line width of the ELVDD signal line and the ELVSS signal line is C, and the touch signal line TP (the touch signal line includes the first touch electrode signal line Tx and the second touch electrode signal line Rx) is designed according to the conventional line width and line space, which can save the Y direction (i.e. the first direction) size ΔY: 2C + (A + B) * (a + b) / 2 - A, and the import conventional default value calculation, ΔY is 7mm, refer to Table 2 below:

[0063] Table 2

[0064] Table 3

[0065] The above Table 3 is the advantages and disadvantages comparison of the scheme of the embodiment relative to the scheme in the related art, and it is obvious that the flexible circuit board provided by the embodiment has the advantages of low cost, thin thickness, and narrow Y direction width, that is, the reduction of the Y direction size of the flexible circuit board is more obvious.

[0066] In an exemplary embodiment, the flexible circuit board further includes a second extension part 16 located on the main body 13 away from the first extension part in the first direction, the second extension part 16 is arranged to extend along the first direction, and one end of the second extension part 16 away from the main body 13 area is provided with a connector 17, the main body 13 area is provided with a protection device 12, the second extension part 16 is located on one side of the main body 13 in the second direction perpendicular to the first direction, in order to facilitate wiring, the protection device 12 is arranged on the side of the main body 13 area close to the second extension part 16 in the second direction perpendicular to the first direction, the main body 13 is provided with a touch IC 11 on the side away from the protection device 12 in the second direction, the first touch trace 103 led out from the first touch terminal 107 is connected to the touch IC 11, then connected in series with the protection device 12, and then connected to the connector 17, the second touch trace 104 led out from the second touch terminal 108 is connected to the touch IC 11, then connected in series with the protection device 12, and then connected to the connector 17.

[0067] In an example embodiment, the second extending portion 16 extends in a direction parallel to the first direction, the second extending portion 16 includes at least a first trace layer and a second trace layer, and a plurality of traces extending in the extending direction of the second extending portion 16 are disposed on the second extending portion 16, the plurality of traces including at least a first trace, the first trace including a first portion disposed on the first trace layer and a second portion disposed on the second trace layer, and a projection of the first portion on the second trace layer at least partially overlaps the second portion.

[0068] It should be noted that in the multi-layer board structure, different types of signal lines cannot be disposed in the same direction and overlap each other, that is, in the flexible circuit board in the related art, the flexible circuit board includes a first circuit layer and a second circuit layer stacked, the first circuit layer has a first signal line, and no other type of signal line can be disposed in the area covered by the projection of the first signal line on the second circuit layer, that is, the area covered by the projection of the first signal line on the second circuit layer is a blank area. In the present embodiment, the same type of signal lines are disposed separately, that is, the first trace includes a first portion disposed on the first trace layer and a second portion disposed on the second trace layer, and the projection of the first portion on the second trace layer at least partially overlaps the second portion. In some embodiments, the line width of the first portion and the line width of the second portion are the same, that is, the first trace (here, the first trace is a single type of trace) is disposed in a double-layer half-trace manner, and the size of the second extending portion 16 in the X direction (that is, a second direction perpendicular to the first direction) is reduced.

[0069] FIG. 6 is a schematic diagram of a double-layer arrangement of an ELVDD signal line in a portion of the second extending portion 16. FIG. 7 is a schematic diagram of a double-layer arrangement of an ELVSS signal line in a portion of the second extending portion 16. The same type of signal lines can be disposed in a double-layer half-trace manner to reduce the size of the second extending portion 16 in the X direction. The signal lines on the second extending portion 16 also include other signal lines in addition to the ELVDD signal line and the ELVSS signal line, for example, the line widths of the signal lines corresponding to the Input voltage AVDD, VCI, VDDI, and DVDD of the driving IC 201 are D, E, F, and G, respectively, and the saved ΔX direction size is (2C+D+E+F+G) / 2, and the conventional default value is introduced for calculation, and ΔX is 2 mm (as shown in Table 4 below).

[0070] Table 4

[0071] Referring to FIGS. 8 and 9, in an exemplary embodiment, the main body 13 includes the first substrate layer 21, the third trace layer 25 and the fourth trace layer 22 located on opposite sides of the first substrate layer 21;

[0072] The third trace layer 25 is sequentially stacked with the insulating layer 23 and the electromagnetic shielding layer 24 away from one side of the first substrate layer 21.

[0073] The fourth trace layer 22 is sequentially stacked with the insulating layer 23 and the electromagnetic shielding layer 24 away from one side of the first substrate layer 21.

[0074] In an exemplary embodiment, the first extension is a single-layer plate structure, and the first extension includes the second substrate layer 31 arranged in the same layer as the first substrate layer 21 and the fifth trace layer 32 arranged in the same layer as the third trace layer 25.

[0075] In an exemplary embodiment, the second extension 16 has the same stack structure as the main body 13, and the width of the second extension 16 in the second direction perpendicular to the first direction is less than the width of the main body 13.

[0076] Referring to FIGS. 8 and 9, the present disclosure also provides a display module including a display panel and the flexible circuit board described above.

[0077] In an exemplary embodiment, a first protective adhesive layer 4 is arranged between the extension area 15 and the display panel, and the first protective adhesive layer 4 is located away from the driving IC 201 on one side of the first extension in the first direction.

[0078] The first protective adhesive layer 4 protects the flexible circuit board, and has an electromagnetic shielding effect and can connect the flexible circuit board and the display panel, thereby improving the stability of the binding connection of the flexible circuit board.

[0079] In an exemplary embodiment, a second protective adhesive layer 5 is arranged away from the display panel on one side of the first extension, one end of the second protective adhesive layer 5 is arranged on one end of the first extension away from the main body 13, and the other end of the second protective adhesive layer 5 crosses the driving IC 201 and is lapped on the main body 13.

[0080] The second protective adhesive layer 5 protects the flexible circuit board and the driving IC 201, and has an electromagnetic shielding effect.

[0081] Exemplarily, a first bonding terminal assembly 500 (including bonding terminals on the flexible circuit board and bonding terminals on the display panel) of the bonding connection between the display panel and the flexible circuit board, and a second bonding terminal assembly 400 of the bonding connection between the display panel and the touch IC are shown in FIG. 8, and there is a gap between the first bonding terminal assembly 500 and the second bonding terminal assembly 400.

[0082] The display device can be a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet computer, or any product or component having a display function, wherein the display device further comprises a flexible circuit board, a printed circuit board, and a back plate.

[0083] The display device can be a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet computer, or any product or component having a display function, wherein the display device further comprises a flexible circuit board, a printed circuit board, and a back plate.

[0084] The following points need to be explained:

[0085] (1) The drawings of the embodiments of the present disclosure only involve the structures involved in the embodiments of the present disclosure, and other structures can be referred to the general design.

[0086] (2) For the sake of clarity, the thickness of a layer or region is exaggerated or reduced in the drawings used to describe the embodiments of the present disclosure, that is, the drawings are not drawn according to the actual proportion. It can be understood that when an element such as a layer, a film, a region or a substrate is referred to as being located "on" or "under" another element, the element can be "directly" located on or under another element or there can be an intermediate element.

[0087] (3) In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0088] It can be understood that the above embodiments are only exemplary embodiments adopted for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also regarded as the protection scope of the present disclosure.

Claims

1. A flexible wiring board for use in a tape automated bonding connection with a display panel, wherein, The display panel comprises a display area and a first binding area located on one side of the display area in a first direction, and the first binding area is provided with a driving IC; The flexible circuit board comprises a main body, and one side of the main body is provided with a first extension in the first direction, the first extension comprises a second binding area and an extension area, the second binding area is used for binding connection with the first binding area, and the extension area is located on one side of the second binding area away from the main body; The extension area is provided with a hollow pattern and a first circuit for providing signals for the display panel, and the hollow pattern is configured to pass through the driving IC.

2. The flexible wiring board according to claim 1, wherein, The second binding area is provided with a plurality of binding terminals, and the plurality of binding terminals comprise a first power terminal and a second power terminal arranged at intervals, and the first circuit comprises a first power line for transmitting a first power signal, and the first power line comprises a first sub-power line and a second sub-power line; The first sub-power line comprises a first sub-portion, a second sub-portion and a third sub-portion connected in sequence, the first sub-portion and the third sub-portion are located on opposite sides of the hollow pattern in a second direction, the second sub-portion is located on one side of the hollow pattern away from the main body in the first direction, and one end of the first sub-portion away from the second sub-portion is connected to the first power terminal, and one end of the third sub-portion away from the second sub-portion is connected to the second power terminal, and the second direction is arranged perpendicular to the first direction; One end of the second sub-power line is connected to the second power terminal, and the other end of the second sub-power line extends towards the main body.

3. The flexible circuit board according to claim 1, wherein, The second binding area is provided with a plurality of binding terminals, and the plurality of binding terminals comprise a first touch terminal and a second touch terminal arranged at intervals; The first circuit comprises a first touch trace and a second touch trace; One end of the first touch trace is connected to the first touch terminal, and the other end of the first touch trace extends towards the main body; The second touch trace comprises a fourth sub-portion, a fifth sub-portion and a sixth sub-portion connected in sequence, the fourth sub-portion and the sixth sub-portion are located on opposite sides of the hollow pattern in a second direction, the fifth sub-portion is located on one side of the hollow pattern away from the main body in the first direction, and one end of the fourth sub-portion away from the fifth sub-portion is connected to the second touch terminal, and one end of the sixth sub-portion away from the fifth sub-portion extends towards the second binding area, and the second direction is arranged perpendicular to the first direction.

4. The flexible wiring board according to claim 1, wherein, Further comprising a second extension located away from the first extension of the main body in the first direction, and a connector connected to an external device is arranged at one end of the second extension away from the main body.

5. The flexible circuit board according to claim 4, wherein, The extending direction of the second extending part is parallel to the first direction, the second extending part comprises at least a first trace layer and a second trace layer, a plurality of traces extending along the extending direction of the second extending part are arranged on the second extending part, and the plurality of traces comprise at least a first trace, the first trace comprises a first part arranged on the first trace layer and a second part arranged on the second trace layer, and the orthogonal projection of the first part on the second trace layer at least partially overlaps the second part.

6. The flexible circuit board according to claim 4, wherein, The main body comprises a first substrate layer, a third trace layer and a fourth trace layer arranged on opposite sides of the first substrate layer; The side of the third trace layer away from the first substrate layer is sequentially provided with an insulating layer and an electromagnetic shielding layer; The side of the fourth trace layer away from the first substrate layer is sequentially provided with an insulating layer and an electromagnetic shielding layer.

7. The flexible circuit board according to claim 6, wherein, The first extending part is a single-layer plate structure, the first extending part comprises a second substrate layer arranged in the same layer as the first substrate layer and a fifth trace layer arranged in the same layer as the third trace layer.

8. The flexible circuit board of claim 6, wherein, The stack structure of the second extending part is the same as that of the main body, and the width of the second extending part in the second direction perpendicular to the first direction is smaller than the width of the main body.

9. A display module, wherein, The display panel and the flexible circuit board of any one of claims 1-8 are comprised.

10. The display module of claim 9, wherein, A first protective adhesive layer is arranged between the extending area and the display panel, and in the first direction, the protective adhesive layer is arranged on the side of the driving IC away from the first binding area.

11. The display module of claim 9, wherein, A second protective adhesive layer is arranged on the side of the first extending part away from the display panel, one end of the second protective adhesive layer is arranged on the end of the first extending part away from the main body, and the other end of the second protective adhesive layer crosses the driving IC and is lapped on the main body.

12. A display device, wherein, The display module of any one of claims 9-11 is comprised.

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