CN114245568A

CN114245568A - Flexible circuit board, display module and display device

Info

Publication number: CN114245568A
Application number: CN202210002921.6A
Authority: CN
Inventors: 王梓鉴; 陆旭; 刘天良; 李飞; 苟宸; 何颖
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-03-25

Abstract

The invention relates to the technical field of display, in particular to a flexible circuit board, a display module and a display device, which are used for avoiding the breakage of signal lines in the flexible circuit board and ensuring the normal display of the display device. A flexible circuit board, characterized in that the flexible circuit board comprises: a device setting portion, a connecting portion and a binding portion extending in a first direction and connected in sequence in a second direction; the first direction and the second direction intersect; at least one end of the connecting part is arranged relative to the end parts of the binding part and the device arranging part in a retraction way; the end portion of the same end of the inward-contracting end of the connecting portion, the binding portion and the end portion of the same end of the inward-contracting end of the connecting portion and the end portion of the same end of the inward-contracting end of the device setting portion and the connecting portion are arranged in a groove shape. The flexible circuit board, the display module and the display device are used for displaying images.

Description

Flexible circuit board, display module and display device

Technical Field

The invention relates to the technical field of display, in particular to a flexible circuit board, a display module and a display device.

Background

The display panel of the display device can be a curved display panel with a certain radian, and compared with the traditional flat display device, the display device has larger visual angles at two opposite sides (such as the left side and the right side) of a screen, so that better visual perception can be provided for a user.

Disclosure of Invention

The embodiment of the invention aims to avoid the signal wire in the flexible circuit board from being broken and ensure the normal display of the applied display module and the applied display device.

In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:

an embodiment of the present invention provides a flexible circuit board, including: a device setting part, a connecting part and a binding part which extend along a first direction and are all connected in sequence along a second direction. The first direction and the second direction intersect. At least one end of the connecting part is arranged relative to the end parts of the binding part and the device arranging part in a retraction way. The end portion of the same end of the inward-contracting end of the connecting portion, the binding portion and the end portion of the same end of the inward-contracting end of the connecting portion and the end portion of the same end of the inward-contracting end of the device setting portion and the connecting portion are arranged in a groove shape.

In the flexible circuit board provided by some embodiments of the present invention, the connection portion respectively connected to the binding portion and the device setting portion is provided, and at least one end of the connection portion is retracted relative to the binding portion and the device setting portion, so that the end portions of the retraction end of the connection portion, the same end as the retraction end of the binding portion and the connection portion, and the same end as the retraction end of the device setting portion and the connection portion are recessed, when the flexible circuit board is applied to the display module, and when external force is applied to opposite sides of the display module to perform bending processing, the external force drives the flexible circuit board to bend, the external force can be released at the retraction setting portion, thereby preventing the binding position between the binding portion and the display panel in the display module from peeling or preventing a signal line on the flexible circuit board from breaking, and improving the stability of binding between the display panel and the flexible circuit board, ensure that the display module can realize normal functions.

In some embodiments, the flexible circuit board comprises a double-layer flexible circuit board.

In some embodiments, the flexible circuit board further comprises: and a reinforcing plate disposed on one side of the plane on which the device-disposing portion is disposed. And the reinforcing plate is close to one end of the connection part, which is arranged in a retracted manner, along the first direction.

In some embodiments, the flexible circuit board further comprises: and a chip disposed on one side of the plane of the device disposing part. The chip and the reinforcing plate are respectively positioned on two opposite sides of a plane where the device arranging part is positioned, and the orthographic projection of the chip on the flexible circuit board is positioned in the range of the orthographic projection of the reinforcing plate on the flexible circuit board.

In some embodiments, the chip comprises a touch chip. The touch chip is configured to provide a touch signal and receive a sensing signal.

In some embodiments, the binding portion includes a plurality of first touch pins. The device setting part comprises a plurality of touch control wires. One end of each of the touch wires is bound with the touch chip, and the other end of each of the touch wires is electrically connected with the first touch pins respectively.

In some embodiments, at least one first touch pin is disposed at one end of the binding portion, which is at the same end as the inward-contracting end of the connecting portion, and the connecting portion is inwardly contracted by a preset dimension relative to the binding portion along the first direction; the preset size is set to be the size of the area occupied by at least one first touch pin in the first direction.

In some embodiments, the flexible circuit board further comprises: and the data chip is arranged on one side of the plane where the device arrangement part is arranged. The data chip and the touch chip are located on the same side of the device setting part. Wherein the data chip is configured to provide a data signal.

In some embodiments, the binding portion further comprises a plurality of first data pins. The device setting part further comprises a plurality of data wires. One end of each data wire is bound with the data chip, and the other end of each data wire is electrically connected with the corresponding first data pin.

In some embodiments, the dual-layer flexible circuit board includes: a first functional layer, a second functional layer, and a base layer disposed between the first functional layer and the second functional layer.

The embodiment of the present invention further provides a display module, where the display module includes: the display panel and the flexible circuit board bound with the display panel and provided with any one of the above embodiments. The display panel comprises a main body part and bending parts which are arranged at two opposite ends of the main body part along a first direction and extend along a second direction; an included angle is formed between the two bending parts and the main body part.

The beneficial effects that can be achieved by the display module provided by some embodiments of the present invention are the same as those that can be achieved by the flexible circuit board provided by some embodiments, and are not described herein again.

In some embodiments, the display panel includes a touch structure. The touch structure includes: the touch control device comprises a first touch control electrode layer, a second touch control electrode layer and a plurality of touch control signal lines. The first touch electrode layer includes: the touch control device comprises a plurality of first touch control electrodes arranged along a first direction. The second touch electrode layer includes: and the plurality of second touch electrodes are arranged along a second direction. One end of each touch signal line is electrically connected with the first touch electrodes and the second touch electrodes respectively; the other ends of the touch signal lines are electrically connected with the touch chip of the flexible circuit board.

In some embodiments, the display panel has a binding region. The display panel further comprises a plurality of second touch pins arranged in the binding area. The second touch control pins are respectively and electrically connected with the other ends of the touch control signal lines and are respectively bound with the first touch control pins of the flexible circuit board.

In some embodiments, the display panel further includes a plurality of second data pins disposed in the bonding region. The display panel further includes a plurality of data lines. The plurality of second data pins are respectively and electrically connected with one ends of the plurality of data lines and are respectively bound with the plurality of first data pins of the flexible circuit board.

An embodiment of the present invention further provides a display device, where the display device includes: the display module assembly according to any one of the above embodiments.

The beneficial effects that can be achieved by the display device provided by some embodiments of the present invention are the same as those that can be achieved by the flexible circuit board provided in some embodiments described above, and are not described herein again.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in some embodiments of the present invention will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings. Furthermore, the drawings in the following description may be regarded as schematic diagrams, and do not limit the actual size and the like of products related to the embodiments of the present invention.

FIG. 1 is a schematic diagram of a flexible printed circuit board with bubbles locally formed in a related art;

FIG. 2 is a block diagram of a display device according to some embodiments of the invention;

FIG. 3 is a block diagram of a display module according to some embodiments of the present invention;

FIG. 4 is a block diagram of a display panel according to some embodiments of the invention;

FIG. 5 is a block diagram of another display panel in accordance with some embodiments of the invention;

FIG. 6 is a block diagram of a flexible circuit board according to some embodiments of the invention;

FIG. 7 is a block diagram of another flexible circuit board according to some embodiments of the invention;

FIG. 8 is a block diagram of yet another flexible circuit board according to some embodiments of the present invention;

FIG. 9 is a block diagram of yet another flexible circuit board according to some embodiments of the invention;

FIG. 10 is a block diagram of yet another flexible circuit board according to some embodiments of the invention.

Detailed Description

The technical solutions in some embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided by the present invention belong to the protection scope of the present invention.

Throughout the specification and claims, the term "comprising" is to be interpreted in an open, inclusive sense, i.e., as "including, but not limited to," unless the context requires otherwise. In the description herein, the terms "one embodiment," "some embodiments," "an example embodiment," "an example" or "some examples" or the like are intended to indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

In describing some embodiments, the expression "connected" and its derivatives may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other. The embodiments disclosed herein are not necessarily limited to the contents herein.

Example embodiments are described herein with reference to cross-sectional and/or plan views as idealized example figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the exemplary embodiments.

Some embodiments of the present invention provide a display device 2000, as shown in fig. 2, the display device 2000 including: the display module 1000.

In some examples, the Display device 2000 may be any one of an LCD (Liquid Crystal Display) device, an OLED (Organic Light Emitting Diode) Display device, a Micro LED (Micro Light Emitting Diode) Display device, and a Mini LED (Mini Light Emitting Diode) Display device, and the Display device may also be any product or component having any Display function, such as a Display, a television, a digital camera, a mobile phone, and a tablet computer.

For convenience of description, the display device 2000 is an OLED display device.

Illustratively, the display device 2000 further includes: a cover plate covering one side of the display module 1000.

For example, the cover plate may be a 3D glass cover plate. The cover plate can protect the display module 1000 from being damaged by the outside.

In some embodiments, as shown in fig. 3, the display module 1000 includes: a display panel 2.

In some examples, the display panel 2 may be a flexible display panel, for example, an AMOLED (Active-Matrix Organic Light Emitting Diode) display panel.

In some examples, as shown in fig. 5, the display panel 2 may have a display area 26.

Illustratively, the display panel 2 may include: a substrate, and a plurality of data lines 25 disposed on the substrate and located in the display region 26. The plurality of data lines 25 may extend in the second direction Y.

Illustratively, the display panel 2 may further include: a plurality of pixel driving circuits disposed on the substrate and located in the display region 26, and a plurality of light emitting devices disposed on a side of the plurality of pixel driving circuits remote from the substrate. The plurality of pixel driving circuits and the plurality of light emitting devices may be electrically connected in a one-to-one correspondence, for example.

For example, the plurality of pixel driving circuits may be arranged in a plurality of columns in the first direction X and a plurality of rows in the second direction Y. One of the data lines 25 may be electrically connected to a column of pixel driving circuits.

Illustratively, the plurality of data lines 25 transmit data signals to the corresponding pixel driving circuits, respectively. The pixel driving circuit may generate a driving signal according to a data signal (certainly, not limited to the data signal), each light emitting device may emit light under the effect of the driving signal provided by the corresponding pixel driving circuit, and the light emitted by the plurality of light emitting devices is mutually matched, so that the display panel 2 realizes a display function.

Illustratively, the first direction X intersects the second direction Y. For example, as shown in fig. 3, the first direction X and the second direction Y may be perpendicular to each other.

In some examples, as shown in fig. 5, the display panel 2 includes a main body 21 and bending portions 22 disposed at two opposite ends of the main body 21 along the first direction X and extending along the second direction Y. An included angle is formed between the two bending portions 22 and the main body portion 21. The main body 21 and the two bent portions 22 are integrally formed.

For example, a part of the plurality of pixel driving circuits may be located in the main body portion 21, and another part may be located in the two bending portions 22. A part of the plurality of light emitting devices may be located at the main body portion 21, and another part may be located at the two bent portions 22.

For example, the two bent portions 22 may be bent toward the same side of the main body portion 21. For example, both the bent portions 22 may be bent toward the non-light-emitting side of the main body portion 21.

For example, the included angles between the two bent portions 22 and the main body portion 21 may be the same.

For example, as shown in fig. 4, the two bent portions 22 may have an arc shape, and the main body portion 21 may have a flat plate shape.

Under the condition that the shape of the bending part 22 is arc-shaped, the edge of the display panel 2 can be smooth, so that the display panel 2 can be protected to a certain extent, and the display panel 2 is prevented from being damaged easily due to the fact that the edge of the display panel 2 is sharp.

In some embodiments, as shown in fig. 3, the display module 1000 further includes: a flexible circuit board 1. The flexible circuit board 1 is bound to the display panel 2.

For example, the flexible circuit board 1 may provide a data signal and the like for the display panel 2, so that the display module 1000 can implement a display function.

Illustratively, as shown in fig. 3 and 5, the display panel 2 may have a binding region 24. The portion of the display panel 2 located in the binding region 24 may be bound to the flexible circuit board 1, and may further receive a data signal and the like from the flexible circuit board 1.

For example, the portion of the display panel 2 located in the bonding region 24 may have a long bar shape extending along the first direction X. The extending direction of the portion of the display panel 2 located in the bonding region 24 may be perpendicular to the extending direction of the bending portion 22.

In the process of manufacturing the display device 2000, an initial display panel may be first formed, and then two opposite sides of the initial display panel are bent to form two bent portions 22, so that an included angle is formed between each bent portion 22 and the main body portion 21, so as to obtain the display panel 2. Further, both ends of the cover plate corresponding to the two bent portions 22 may be bent, and then the bent cover plate may be bonded to the display panel 2, thereby obtaining the display device 2000.

In the related art, before the initial display panel is bent, the initial display panel is bound to the flexible circuit board to obtain an initial display module. And then bending two opposite sides of the initial display panel in the initial display module, which are vertical to the flexible circuit board. However, the bending process will drive the portion of the display panel located in the binding region, the binding position of the flexible circuit board and the display panel, and the body of the flexible circuit board to bend. Because the body of flexible circuit board is difficult for buckling, will make the binding position between display panel and the flexible circuit board take place to peel off to make steam from peeling off the inside bubble etc. that forms of position invasion flexible circuit board (as shown in figure 1), and make the signal line on the flexible circuit board fracture, and then produce harmful effects to the transmission of the signal between flexible circuit board and the display panel, lead to the display module assembly to be difficult to realize normal display function.

Based on this, the invention provides a flexible circuit board 1, which is applied to the display module 1000. As shown in fig. 6 to 9, the flexible circuit board 1 includes: a device setting section 13, a connecting section 12, and a binding section 11 extending in the first direction X and connected in this order in the second direction Y.

In some examples, the device setting portion 13, the connection portion 12, and the binding portion 11 are connected to each other in this order.

For example, the connection portion 12 may have an elongated shape extending in the first direction X, and the binding portion 11 may have an elongated shape extending in the first direction X.

Illustratively, the device setting part 13 is used for setting devices, and the connection part 12 may connect the device setting part 13 and the binding part 11, and the binding part 11 is used for binding with the display panel 2.

In some examples, as shown in fig. 6 and 7, at least one end of the connecting portion 12 is recessed with respect to the end portions of the binding portion 11 and the device setting portion 13, and the recessed end of the connecting portion 12, the end portion of the binding portion 11 that is the same as the recessed end of the connecting portion 12, and the end portion of the device setting portion 13 that is the same as the recessed end of the connecting portion 12 are recessed.

Illustratively, the end portions of the binding portion 12 described above refer to opposite ends of the binding portion 12 along the first direction X; the end portions of the device arrangement portion 13 refer to opposite ends of the device arrangement portion 13 in the first direction X.

For example, as shown in fig. 6, the connecting portion 12 extends in the first direction X with one of the ends thereof being set back with respect to the ends of the binding portion 11 and the device setting portion 13. At this time, the connecting portion has a retracted end. The end portion of the connection portion 12, the end portion of the binding portion 11, which is the same as the end portion of the connection portion 12, and the end portion of the device installation portion 13, which is the same as the end portion of the connection portion 12, are disposed in a groove shape. The end portion of the binding portion 11 that is the same end as the retracted end of the connecting portion 12 and the end portion of the device-setting portion 13 that is the same end as the retracted end of the connecting portion 12 are disconnected from each other, and no connection is made.

As shown in fig. 7, both ends of the connecting portion 12 extending in the first direction X are recessed with respect to the ends of the binding portion 11 and the device installation portion 13. In this case, the connecting portion 12 has two retracted ends. One of the two retraction ends of the connection portion 12, one end portion of the binding portion 11 and the retraction end, and one end portion of the device setting portion 13 and the retraction end are in groove-shaped arrangement, the other one of the two retraction ends of the connection portion 12, the other end portion of the binding portion 11 and the retraction end, and the other end portion of the device setting portion 13 and the retraction end are in groove-shaped arrangement. Any one end of the binding portion 11 and the end of the device installation portion 13 that is the same end as the binding portion 11 are disconnected and not connected.

By adopting the above arrangement, at least one end of the connection portion 12 of the flexible circuit board 1 is retracted relative to the binding portion 11 and the device setting portion 13, so that the retracted end of the connection portion 12, the end of the same end of the retracted end of the binding portion 11 and the connection portion 12, and the end of the same end of the retracted end of the device setting portion 13 and the connection portion 12 are disposed in a groove shape, and before the external force is transmitted to the flexible circuit board 1 in the process of applying the external force to the initial display panel for bending, the external force can be released at the groove-shaped structure 101 formed by the retracted arrangement to prevent the external force from being concentrated at the binding portion 11 and the connection portion 12, so as to protect the flexible circuit board 1, prevent the binding position between the binding portion 11 and the display panel 2 from being peeled off, or prevent signal lines (such as data 135, touch 134 and the like mentioned in the following description of the present invention) on the flexible circuit board 1 from being broken, the display module 1000 can be ensured to realize normal functions (e.g., display function or touch function).

The size of the end portions of the connecting portion 12 that are recessed with respect to the binding portion 11 and the device installation portion 13 is related to the magnitude of external force applied to the bending process, the size of the flexible circuit board 1, the process for forming the display module 1000, and the like. Therefore, the size of the connection portion 12 retracted into the binding portion 11 and the device installation portion 13 can be selected according to actual needs, and the present invention is not limited thereto.

Illustratively, as shown in fig. 7, at least one end of the connecting portion 12 is recessed with respect to the end of the binding portion 11 by a dimension in a range of 1.5mm to 2.0 mm. The groove-like recess 101 may have a dimension in the second direction Y in the range of 0.6mm to 1.0mm, that is, the dimension of the connection portion 12 in the second direction Y in the range of 0.6mm to 1.0 mm.

For example, the dimension of the at least one end of the connecting portion 12 that is recessed with respect to the end of the binding portion 11 may be 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2.0 mm.

For example, the dimension of the connection portion 12 in the second direction Y may be 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1.0 mm.

In the flexible circuit board 1 according to some embodiments of the present invention, the connection portion 12 is disposed between the binding portion 11 and the device setting portion 13, and at least one end of the connection portion 11 is recessed with respect to the binding portion 11 and the end of the device setting portion 13, such that the recessed end of the connection portion 12, the end of the binding portion 11 at the same end as the recessed end of the connection portion 12, and the end of the device setting portion 13 at the same end as the recessed end of the connection portion 12 are recessed, when the flexible circuit board 1 is applied to the display module 1000, an external force is applied to two opposite sides of the display module 1000 to perform a bending process, and the portion of the display panel 2 located in the binding region 26 and the bending process of the flexible circuit board 1 are driven, where the external force can be released at the recessed end to avoid being transmitted to the body of the flexible circuit board 1 (e.g. including the device setting portion 13), further, the bonding position between the bonding portion 11 and the display panel 2 can be prevented from being peeled off, or the signal lines (for example, the data traces 135, the touch traces 134, and the like mentioned in the following description of the invention) on the flexible circuit board 1 can be prevented from being broken, so that the bonding stability between the display panel 2 and the flexible circuit board 1 is improved, and the display module 1000 can realize normal functions.

In some examples, the flexible circuit board 1 may include a multilayer flexible circuit board. The signal lines in the multilayer flexible circuit board are distributed in different functional layers, and the ground layer is added between different functional layers, so that the signal lines in the flexible circuit board 1 are prevented from interfering with each other and affecting the function of the flexible circuit board 1.

In other examples, the flexible circuit board 1 includes a double-layer flexible circuit board.

The double-layer flexible circuit board is adopted, the thickness of the flexible circuit board 1 is reduced, and the double-layer flexible circuit board has a mature manufacturing process, so that the manufacturing cost of the flexible circuit board 1 can be reduced.

Illustratively, as shown in fig. 10, the double-layer flexible circuit board includes: a first functional layer 151, a second functional layer 152, and a base layer 153 disposed between the first functional layer 151 and the second functional layer 152.

For example, the first functional layer 151 and the second functional layer 152 may both be conductive layers. The conductive layer may be made of copper foil. The invention can etch the copper foil to form the required signal routing.

For example, the material of the base layer 153 may be PI (Polyimide). The base layer 153 can support and fix the first functional layer 151 and the second functional layer 152, and separate them from each other, so as to prevent interference.

Illustratively, as shown in fig. 10, the double-layer flexible circuit board further includes a first insulating layer 154 and a first electromagnetic shielding layer 155 sequentially disposed on a side of the first functional layer 151 away from the base layer 153, and a second insulating layer 156 and a second electromagnetic shielding layer 157 sequentially disposed on a side of the second functional layer 152 away from the base layer 153.

The first insulating layer 154 may perform insulating protection on the first functional layer 151, and the second insulating layer 156 may perform insulating protection on the second functional layer 152.

The first electromagnetic shielding layer 155 and the second electromagnetic shielding layer 157 may perform a shielding function to prevent the first functional layer 151 and the second functional layer 152 from being subjected to electromagnetic interference.

In some embodiments, as shown in fig. 9, in the case where the flexible circuit board is a double-layer flexible circuit board, the flexible circuit board 1 further includes: and a reinforcing plate 131 provided on one side of the plane of the device-placing portion 13.

For example, as shown in fig. 10, the reinforcing plate 131 may pass through the via hole of the second electromagnetic shielding layer 157 of the flexible circuit board to be fixed to the second insulating layer 156 of the flexible circuit board.

Because the strength of the double-layer flexible circuit board is poor, the integral stiffness of the double-layer flexible circuit board is poor, the reinforcing plate 131 is arranged on one side of the device setting area 13, the integral strength of the flexible circuit board 1 can be improved, and the integral flatness of the flexible circuit board 1 can be improved, so that devices can be conveniently arranged on the device setting part 13 of the flexible circuit board 1.

In some examples, the reinforcing plate 131 is near one end of the connection portion 12 disposed to be retracted in the first direction X.

For example, in the case where both ends of the connecting portion 12 are provided with the inward-contraction arrangement, the reinforcing plate 131 may be close to either end of the connecting portion 12. In the case where the end of the connecting portion 12 is provided with a recessed portion, the reinforcing plate 131 may be provided near the end of the connecting portion 12 having the recessed portion.

Under the condition that double-deck flexible circuit board includes the stiffening plate, at the in-process of buckling the processing to initial display module assembly, the external force of exerting can drive buckling of flexible circuit board, and the stiffening plate position department is difficult to buckle. By adopting the arrangement mode, the arrangement is along the first direction X, one end of the reinforcing plate 131, which is close to the inward-shrinkage arrangement of the connecting part 12, is bent on the display module 1000, and when the applied external force drives the flexible circuit board 1 to be bent, the external force can be released at the inward-shrinkage arrangement of the connecting part 12, so that the position of the reinforcing plate 131 is prevented from being bent, further, the stress concentration phenomenon at the position of the reinforcing plate 131 in the flexible circuit board 1 is prevented, further, the binding between the position, which is close to the reinforcing plate 131, in the flexible circuit board 1 and the display panel 2 is prevented from being stripped, the signal line between the flexible circuit board 1 and the display panel 2 is prevented from being broken, the binding stability between the flexible circuit board 1 and the display panel 2 is improved, and the display module 1000 can realize normal functions.

In some examples, as shown in fig. 9, the flexible circuit board 1 further includes a connector 136.

For example, the connector 136 may be used to connect an external circuit board, for example, in the case that the flexible circuit board 1 is applied to the display module 1000, the connector 136 may be connected to a main board of the display panel 2.

In some examples, the display panel 2 may include a touch structure 23 disposed on a side of the plurality of light emitting devices away from the substrate.

For example, the touch structure 23 may be used to implement a touch function of the display module 1000.

For example, the touch structure may be an FMLOC (Flexible Multi-Layer On Cell) structure.

Compare in outer hanging touch panel, adopt touch-control structure 23 of FMLOC structure, can reduce display module 1000's thickness, improve display module 1000's yield to reduce display module 1000's cost of manufacture.

In some embodiments, as shown in fig. 8 and 9, the flexible circuit board 1 further includes: a chip disposed on one side of the plane on which the device disposing part 13 is located. The chip and the reinforcing plate 131 are respectively located on two opposite sides of the plane where the device setting part 13 is located, and the orthographic projection of the chip on the flexible circuit board 1 is located within the range of the orthographic projection of the reinforcing plate 131 on the flexible circuit board 1.

Illustratively, the orthographic projection area of the chip on the flexible circuit board 1 is smaller than that of the reinforcing plate 131 on the flexible circuit board 1, and the boundary line of the orthographic projection of the chip on the flexible circuit board 1 is partially overlapped or not overlapped with the boundary line of the orthographic projection of the reinforcing plate 131 on the flexible circuit board 1 with a distance between the two boundary lines.

By adopting the arrangement mode, the welding strength of the chip and the flexible circuit board 1 can be ensured.

In some examples, the chip may be the touch chip 132.

In some examples, the touch chip 132 is configured to provide touch signals and receive sense signals.

For example, the touch chip 132 may provide a touch signal to the display panel 2 through the flexible circuit board 1 and receive a sensing signal from the display panel 2.

For example, the touch chip 132 provides a touch signal, which can be transmitted to the touch structure of the display panel 2. The touch signal may be, for example, a signal that is sequentially scanned along the second direction Y of the display panel 2 to detect capacitance values and the like at different positions of the display panel 2; when a certain position of the display panel 2 is touched, the touch structure in the display panel 2 senses the capacitance change at the position and the coordinate of the position in the display panel 2, and generates a corresponding sensing signal, and transmits the sensing signal to the touch chip 132.

In some embodiments, as shown in fig. 8 and 9, the binding portion 11 includes a plurality of first touch pins 111. The device setting part 13 includes a plurality of touch traces 134. One end of the touch traces 134 is bound to the touch chip 132, and the other end of the touch traces 134 is electrically connected to the first touch pins 111, respectively.

For example, the touch traces 134 can include a transmitting touch trace and a receiving touch trace. The first touch pins 111 may include a first transmitting touch pin and a first receiving touch pin. For example, the first transmitting touch pins may be electrically connected to the transmitting touch traces in a one-to-one correspondence; the touch signal provided by the touch chip 132 can be transmitted to the corresponding first transmitting touch pin through the transmitting touch trace. The first receiving touch pins can be electrically connected with the receiving touch wires in a one-to-one correspondence manner; the sensing signal received by the first receiving touch pin can be transmitted to the touch chip 132 through the corresponding receiving touch trace.

It should be noted that there are many situations where the plurality of first touch pins 111 are located at the binding portion 11, for example, the plurality of first touch pins 111 may be all close to one end of the binding portion 11; the first touch pins 111 may be respectively close to two ends of the binding part 11; the plurality of first touch pins 111 may be located at an intermediate position of the binding part 11. Correspondingly, the positions of the touch traces 134 on the device installation portion 13 may also be arranged correspondingly according to the electrically connected first touch pins 11.

In some embodiments, as shown in fig. 8 and 9, at least one first touch pin 111 is disposed at an end of the binding portion 11 that is at the same end as the retracted end of the connecting portion 12, and the connecting portion 12 is retracted by a predetermined dimension relative to the binding portion 11 along the first direction X; the preset size is set to be a size of an area occupied by the at least one first touch pin 111 in the first direction X.

For example, one first touch pin 111 or a plurality of first touch pins 111 may be disposed at the end of the binding portion 11 that is the same as the end of the connection portion 12 that is retracted.

For example, the predetermined size may be a size of an area occupied by one first touch pin 111 in the first direction X. At this time, the predetermined size is a size of the first touch pin 111 in the first direction X.

For another example, the predetermined size may be a size of an area occupied by the first touch pins 111 in the first direction X. At this time, the preset size is the sum of the size of the first touch pins 111 in the first direction X and the distance between any two adjacent first touch pins 111 in the first direction X.

One end of the same end of the inward shrinkage end of the binding part 11 and the connecting part 12 is provided with at least one first touch pin 111, along the first direction X, the inward shrinkage preset size of the connecting part 12 relative to the binding part 11 can be realized, when bending processing is performed on two opposite sides of the initial display panel, the external force can be released at the inward shrinkage setting position, the touch function of the display module 1000 is ensured, the external force is prevented from being concentrated at the position of the first touch pin 111, the breakage of the first touch pin 111 and the touch wire 134 is avoided, and further the signal transmission between the first touch pin 111 and the touch wire 134 is influenced.

It is understood that a binding mark (binding mark) is further disposed on a side of the first touch pin 111 close to the binding part 11. By adopting the arrangement mode, the stress at the binding mark can be effectively released in the process of bending the display module.

In some embodiments, as shown in fig. 8 and 9, the flexible circuit board 1 further includes: and a data chip 133 disposed on one side of the plane on which the device setting part 13 is located. The data chip 133 and the touch chip 132 are located on the same side of the device setting section 13. Wherein the data chip 133 is configured to provide a data signal.

For example, the data chip 133 may be bound to the display panel 2 through the flexible circuit board 1 to provide a data signal for the display panel 2, so as to implement normal display of the display module 1000.

For example, as shown in fig. 8, in the case where one end of the connecting portion 12 is set to be retracted with respect to the end portions of the binding portion 11 and the device setting portion 13, the data chip 133 may be provided near the end portion of the connecting portion 12 where retraction is not performed.

In some embodiments, the binding 11 further includes a plurality of first data pins 112. The device setting section 13 further includes a plurality of data wirings 135. One end of the data traces 135 is bound to the data chip 132, and the other end of the data traces 135 is electrically connected to the first data pins 112, respectively.

For example, a plurality of data traces 135 may correspond to each of the first data pins 112 one to one, and one end of each data trace 135 is electrically connected to a corresponding one of the first data pins 112.

For example, the data chip 133 may provide data signals transmitted to the corresponding first data pins 112 by the plurality of data traces 135.

For example, the touch trace 134 may be located at a first functional layer of the dual-layer flexible circuit board, and the data trace 135 may be located at a second functional layer of the dual-layer flexible circuit board.

In some embodiments, as shown in fig. 5, the touch structure 23 in the display panel 2 includes: a first touch electrode layer 231, a second touch electrode layer 232, and a plurality of touch signal lines 233.

It should be noted that the arrangement of the first touch electrode layer 231, the second touch electrode layer 232 and the plurality of touch signal lines 233 is various and can be selected according to actual needs, which is not limited in the present invention.

In some examples, the first touch electrode layer 231 includes: the touch panel comprises a plurality of first touch electrodes arranged along a first direction X. The second touch electrode layer 232 includes: and a plurality of second touch electrodes arranged along the second direction Y.

For example, the first touch electrode and the second touch electrode may have a stripe structure.

For example, the first touch electrode may be Tx (Transmit, touch Transmit electrode), and the second touch electrode may be Rx (Receive, touch Receive electrode); alternatively, the first touch electrode 111 may be Rx, and the second touch electrode 112 may be Tx, which is not limited in the embodiments of the present invention. Tx is used for transmitting touch signals and Rx is used for receiving touch signals.

In some examples, one end of the plurality of touch signal lines 233 is electrically connected to the plurality of first touch electrodes 231 and the plurality of second touch electrodes 232, respectively; the other ends of the plurality of touch signal lines 233 are electrically connected to the touch chip 132 of the flexible circuit board 1.

For example, the multiple multi-touch signal lines 233 may correspond to the multiple first touch electrodes 231 or the multiple second touch electrodes 232 one by one, and one end of each of the multiple multi-touch signal lines 233 is electrically connected to a corresponding one of the first touch electrodes 231 or one of the second touch electrodes 232.

Illustratively, the plurality of touch signal lines 233 may include a transmitting touch signal line and a receiving touch signal line. For example, the transmitting touch signal line may be connected to the first touch electrode Tx, and the receiving touch signal line may be connected to the second touch electrode Rx.

With the above arrangement, the touch signal provided by the touch chip 132 can be transmitted to the first touch electrode Tx through the transmitting touch signal line, and the sensing signal received by the second touch electrode Rx can be transmitted to the touch chip 132 through the receiving touch signal line, so as to implement the touch function of the display module 1000.

In some examples, the display panel 2 further includes a plurality of second touch pins 241 disposed in the bonding region 24. The second touch pins 241 are electrically connected to the other ends of the touch signal lines 233, and are respectively bonded to the first touch pins 111 of the flexible circuit board 1.

For example, the plurality of second touch pins 241 may correspond to the plurality of touch signal lines 233 one to one, and each of the second touch pins 241 is electrically connected to the other end of one of the touch signal lines 233.

For example, the plurality of second touch pins 241 correspond to the plurality of first touch pins 111 of the flexible circuit board 1 one to one, and each second touch pin 241 is bound to a corresponding one of the first touch pins 111.

For example, the second touch pins 241 may include a second transmitting touch pin and a second receiving touch pin. The second transmitting touch control pin can be connected with the transmitting touch control signal line, and the second receiving touch control pin can be connected with the receiving touch control signal line.

For example, the second transmitting touch pin may be bound to the first transmitting touch pin, and the second receiving touch pin may be bound to the first receiving touch pin.

It should be noted that the sensing signal received by the second touch electrode Rx in the display panel 2 is sequentially transmitted to the touch chip 132 through the receiving touch signal line in the touch signal line 233, the second receiving touch pin in the second touch pin 241, the first receiving touch pin in the first touch pin 111, and the receiving touch trace in the touch trace 134. After receiving the sensing signal, the touch chip 132 provides a touch signal, and the touch signal is transmitted to the first touch electrode Tx in the display panel 2 through the transmitting touch trace in the touch trace 134, the first transmitting touch pin in the first touch pin 111, the second transmitting touch pin in the second touch pin 241, and the transmitting touch signal line in the touch signal line 233 in sequence. Thus, the touch function of the display module 1000 is realized.

By adopting the above arrangement, when the display module 1000 is bent, since at least one end of the connecting portion 12 is set to be retracted relative to the binding portion 11 and the device setting portion 13, the phenomenon that the binding between the second touch pins 241 and the first touch pins 111 is peeled off can be avoided, and further the touch function of the display module 1000 is affected. The gap between the second touch pins 241 and the first touch pins 111, from which water vapor is stripped, can be prevented from invading the display module 1000, so that the service life of the display module 1000 is shortened.

In some embodiments, as shown in fig. 5, the display panel 2 further includes a plurality of second data pins 242 disposed in the bonding region 24. The plurality of second data pins 242 are electrically connected to one ends of the plurality of data lines 25, respectively, and are bound to the plurality of first data pins 112 of the flexible circuit board 1, respectively.

For example, the plurality of second data pins 242 correspond to the plurality of first data pins 112 one to one, and each of the second data pins 242 is bound to a corresponding one of the first data pins 112.

It should be noted that, in the actual product display module 1000 of the present invention, the plurality of first data pins 112 and the corresponding plurality of second data pins 242 should be overlaid and bound with each other. In fig. 3, only for clearly illustrating the binding correspondence relationship between the plurality of first data pins 112 and the plurality of second data pins 242, the first data pins 112 and the second data pins 242 corresponding to each other are drawn in a staggered overlapping relationship, and do not represent the relative position relationship between the first data pins 112 and the second data pins 242 in an actual product.

Illustratively, the data signal provided by the data chip 133 in the flexible circuit board 1 sequentially passes through each data trace 135, each first data pin 112, each second data pin 242, and each data line 25, and is transmitted to the corresponding pixel driving circuit of the display structure of the display panel 2, so as to drive the corresponding light emitting device to emit light, thereby implementing the display function of the display panel 2.

By adopting the above arrangement mode, when the display module 1000 is bent, since at least one end of the connecting portion 12 is set to be retracted relative to the binding portion 11 and the device setting portion 13, the binding between the second data pin 242 and the first data pin 112 can be prevented from being peeled off, and further the display function of the display module 1000 is affected. With the above arrangement, the gap between the second touch pins 241 and the first touch pins 111 where water vapor is stripped can be prevented from invading the display module 1000 to form bubbles, and the service life of the display module 1000 can be further shortened.

The beneficial effects that can be achieved by the display device provided by some embodiments of the present invention are the same as those that can be achieved by the flexible circuit board provided by some embodiments, and are not described herein again.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can appreciate that changes or substitutions within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A flexible circuit board, characterized in that the flexible circuit board comprises: a device setting portion, a connecting portion, and a binding portion extending in a first direction and connected in sequence in a second direction; the first direction and the second direction intersect;

at least one end of the connecting part is arranged relative to the end parts of the binding part and the device arranging part in a retraction way; the end portion of the same end of the inward-contracting end of the connecting portion, the binding portion and the end portion of the same end of the inward-contracting end of the connecting portion and the end portion of the same end of the inward-contracting end of the device setting portion and the connecting portion are arranged in a groove shape.

2. The flexible circuit board of claim 1, wherein the flexible circuit board comprises a double-layer flexible circuit board.

3. The flexible circuit board of claim 2, further comprising: a reinforcing plate disposed on one side of a plane on which the device-disposing section is disposed;

and the reinforcing plate is close to one end of the connection part, which is arranged in a retracted manner, along the first direction.

4. The flexible circuit board of claim 3, further comprising: a chip disposed on one side of the plane where the device disposing part is located;

the chip and the reinforcing plate are respectively positioned on two opposite sides of a plane where the device arranging part is positioned, and the orthographic projection of the chip on the flexible circuit board is positioned in the range of the orthographic projection of the reinforcing plate on the flexible circuit board.

5. The flexible circuit board of claim 4, wherein the chip comprises a touch chip; the touch chip is configured to provide a touch signal and receive a sensing signal.

6. The flexible circuit board of claim 5, wherein the binding portion comprises a plurality of first touch pins;

the device setting part comprises a plurality of touch control wires;

one end of each of the touch wires is bound with the touch chip, and the other end of each of the touch wires is electrically connected with the first touch pins respectively.

7. The flexible circuit board of claim 6, wherein at least one first touch pin is disposed at an end of the binding portion that is at the same end as the retracted end of the connecting portion, and the connecting portion is retracted by a predetermined dimension relative to the binding portion along the first direction;

the preset size is set to be the size of the area occupied by at least one first touch pin in the first direction.

8. The flexible circuit board of claim 5, further comprising: a data chip disposed on one side of the plane where the device setting part is located; the data chip and the touch chip are positioned on the same side of the device setting part;

wherein the data chip is configured to provide a data signal.

9. The flexible circuit board of claim 8, wherein the binding portion further comprises a plurality of first data pins;

the device setting part also comprises a plurality of data wires;

one end of each data wire is bound with the data chip, and the other end of each data wire is electrically connected with the corresponding first data pin.

10. The flexible circuit board of claim 2, wherein the double-layer flexible circuit board comprises:

a first functional layer, a second functional layer, and a substrate disposed between the first functional layer and the second functional layer.

11. The utility model provides a display module assembly, its characterized in that, display module assembly includes:

the display panel comprises a main body part and bending parts which are arranged at two opposite ends of the main body part along a first direction and extend along a second direction; an included angle is formed between the two bending parts and the main body part;

and the flexible circuit board bound with the display panel according to any one of claims 1 to 10.

12. The display module of claim 11, wherein the display panel comprises a touch structure;

the touch structure includes: the touch control device comprises a first touch control electrode layer, a second touch control electrode layer and a plurality of touch control signal lines;

the first touch electrode layer includes: a plurality of first touch electrodes arranged along a first direction;

the second touch electrode layer includes: a plurality of second touch electrodes arranged along a second direction;

one end of each touch signal line is electrically connected with the first touch electrodes and the second touch electrodes respectively;

the other ends of the touch signal lines are electrically connected with the touch chip of the flexible circuit board.

13. The display module of claim 12, wherein the display panel has a binding region;

the display panel further comprises a plurality of second touch pins arranged in the binding area;

the second touch control pins are respectively and electrically connected with the other ends of the touch control signal lines and are respectively bound with the first touch control pins of the flexible circuit board.

14. The display module assembly of claim 13, wherein the display panel further comprises a plurality of second data pins disposed in the bonding region;

the display panel further comprises a plurality of data lines;

the plurality of second data pins are respectively and electrically connected with one ends of the plurality of data lines and are respectively bound with the plurality of first data pins of the flexible circuit board.

15. A display device, characterized in that the display device comprises: the display module according to any one of claims 11 to 14.