CN216673389U - Circuit board connection structure and double-sided display device - Google Patents

Abstract

The embodiment of the utility model discloses a circuit board connecting structure and a double-sided display device, wherein the circuit board connecting structure comprises a flexible circuit board and a printed circuit board, a first output end and a second output end are respectively arranged at two ends of a first surface of the flexible circuit board, an input end is also arranged between the first output end and the second output end, the input end comprises a first conductive terminal and a second conductive terminal which are arranged in parallel, and the first conductive terminal and the second conductive terminal are respectively communicated with lines of the first output end and the second output end; the first conductive terminal and the second conductive terminal of the flexible circuit board are simultaneously connected with the binding area of the printed circuit board in a binding mode. The circuit board connecting structure and the double-sided display device comprising the circuit board connecting structure have the advantages of being low in cost, simple in assembly, high in overall matching performance, capable of reducing overall thickness and high in practicality.

Description

Circuit board connection structure and double-sided display device

Technical Field

The utility model relates to the field of processing and manufacturing of liquid crystal displays, in particular to a circuit board connecting structure and a double-sided display device.

Background

With the diversification of commercial display requirements, the conventional single-sided display device cannot completely meet the actual requirements, and the double-sided display device is produced.

Fig. 1 is a schematic structural diagram of a conventional dual-sided display device. As shown in fig. 1, the dual-sided display device includes a first display panel 10 and a second display panel 20 disposed opposite to each other, and the first display panel 10 and the second display panel 20 share a backlight module 30 to implement dual-sided display. Wherein a first pad 11 is provided at one side of the first display panel 10, a second pad 21 is provided at one side of the second display panel 20, and a first printed circuit board 40 and a second printed circuit board 50. The first printed Circuit board 40 and the second printed Circuit board 50 are, for example, pcbs (printed Circuit boards). The first printed circuit board 40 is provided with a first input interface 41 and a first output interface 42, and the second printed circuit board 50 is provided with a second input interface 51 and a second output interface 52. One end of the first flexible circuit board 60 is bound and connected with the first output interface 42, and the other end is bound and connected with the first pad 11. One end of the second flexible circuit board 70 is bound and connected with the second output interface 52, and the other end is bound and connected with the second pad 21. The first flexible circuit board 60 and the second flexible circuit board 70 are, for example, fpcs (flexible Printed circuits). The first input interface 41 and the second input interface 51 are used for receiving input signals, such as driving signals like image signals, video signals, sound signals, etc. In particular, the first input interface 41 and the second input interface 51 are coupled in input signals, for example, through a first connector 45 and a second connector 55, respectively.

As can be seen from the above, the first display panel 10 and the second display panel 20 of the conventional dual-sided display device need to control their respective image displays through the first printed circuit board 40 and the second printed circuit board 50, respectively, so that the thickness of the side where the circuit boards are disposed is thicker; meanwhile, since the first printed circuit board 40 and the second printed circuit board 50 are two separate boards, the double-sided display device has a high cost and is complicated to mount; moreover, the first printed circuit board 40 and the second printed circuit board 50 are respectively provided with the first input interface 41 and the second input interface 51, and are also bound and connected with the first display panel 10 and the second display panel 20 through the first flexible circuit board 60 and the second flexible circuit board 70, respectively, the interface connection installation is also complicated, and a client system also needs to provide two sets of signals, so that the overall collocation ratio of the dual-sided display device is poor.

In view of the above, the applicant of the present invention has made extensive conception in view of the defects and inconveniences caused by the perfection of the dual-sided display device in the prior art, and has actively researched and developed the present invention by means of improvement and trial.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a circuit board connecting structure and a double-sided display device, and aims to solve the problems that the double-sided display device in the prior art is high in cost, complex in installation and poor in overall matching.

In order to solve the technical problem, the solution of the utility model is as follows: disclosed is a circuit board connection structure, including a flexible circuit board and a printed circuit board, the flexible circuit board including a first surface disposed opposite to a bonding area of the printed circuit board; the flexible circuit board is provided with a first output end at one end of the first surface, a second output end at the other end, an input end between the first output end and the second output end, the input end is bound and connected with the binding area of the printed circuit board, the input end of the flexible circuit board at least comprises a first conductive terminal and a second conductive terminal which are arranged in parallel, the first conductive terminal is communicated with the circuit of the first output end, and the second conductive terminal is communicated with the circuit of the second output end; the binding area of the printed circuit board at least comprises a third conductive terminal and a fourth conductive terminal which are arranged in parallel; the first conductive terminal of the flexible circuit board is bound and connected with the third conductive terminal of the printed circuit board, and the second conductive terminal of the flexible circuit board is bound and connected with the fourth conductive terminal of the printed circuit board.

Preferably, the first conductive terminal, the second conductive terminal, the third conductive terminal and the fourth conductive terminal respectively comprise a plurality of gold fingers arranged at intervals; the golden fingers of the first conductive terminal and the golden fingers of the second conductive terminal are arranged in a staggered mode, the golden fingers of the third conductive terminal correspond to the golden fingers of the first conductive terminal in position, and the golden fingers of the fourth conductive terminal correspond to the golden fingers of the second conductive terminal in position.

Preferably, the other end of the flexible circuit board bypasses the printed circuit board and makes the second output terminal correspond to the first output terminal.

Preferably, the surface of the printed circuit board far away from the binding region is provided with a reinforcing region, and the other end of the flexible circuit board bypasses the printed circuit board and is fixed with the reinforcing region.

Preferably, the printed circuit board is further provided with a signal input end, and the signal input end is conducted with the circuit of the binding area; the signal input end receives a group of driving signals and respectively transmits the driving signals to the first output end and the second output end of the flexible circuit board through the third conductive terminal and the fourth conductive terminal.

The double-sided display device comprises a first display panel, a second display panel and a backlight module, wherein the first display panel and the second display panel are arranged oppositely, and the backlight module is clamped between the first display panel and the second display panel; the circuit board connecting structure is characterized by further comprising the circuit board connecting structure; the first output end of the flexible circuit board is bound and connected with the first bonding pad of the first display panel, the second output end of the flexible circuit board is bound and connected with the second bonding pad of the second display panel by bypassing the printed circuit board, and the first bonding pad and the second bonding pad are both located in the non-display area.

Preferably, the first conductive terminal and the second conductive terminal of the flexible circuit board correspondingly transmit a set of driving signals to the first display panel and the second display panel, so that the first display panel and the second display panel which are oppositely arranged can simultaneously display the same or different picture contents.

Preferably, the backlight module includes a first light emitting surface and a second light emitting surface, the first light emitting surface is disposed opposite to the first display panel, and the second light emitting surface is disposed opposite to the second display panel.

Preferably, the first display panel and the second display panel respectively include an upper substrate, a lower substrate, and a liquid crystal layer interposed between the upper substrate and the lower substrate.

Preferably, the first pad of the first display panel and the second pad of the second display panel are both located on the lower substrate.

Preferably, the first display panel is further provided with a first driving chip for driving the first display panel, and the second display panel is further provided with a second driving chip for driving the second display panel; the first driving chip and the second driving chip are both located on the lower substrate.

The embodiment of the utility model specifically discloses a circuit board connecting structure and a double-sided display device, which only adopt one flexible circuit board and one printed circuit board to realize the simultaneous display of different display panels, effectively reduce the cost, simplify the assembly, have high overall collocation, reduce the overall thickness, have higher practicability and greatly improve the functions and market competitiveness of products.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of a conventional dual-sided display device;

fig. 2 is a schematic structural diagram of a flexible circuit board in a circuit board connection structure according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a printed circuit board in a circuit board connection structure according to an embodiment of the disclosure;

FIG. 4 is a schematic diagram of an overall structure of a circuit board connection structure according to an embodiment of the present invention;

fig. 5 is a schematic view of the overall structure of the circuit board connection structure disclosed in the second embodiment of the present invention;

fig. 6 is a schematic structural diagram of a dual-sided display device disclosed in the third embodiment of the present invention.

Detailed Description

In order to further explain the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements can be directly connected or indirectly connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

fig. 2 is a schematic structural diagram of a flexible circuit board in a circuit board connection structure according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a printed circuit board in a circuit board connection structure according to an embodiment of the disclosure; fig. 4 is a schematic view of an overall structure of a circuit board connection structure according to an embodiment of the present invention.

As shown in fig. 2 to 4, the present embodiment discloses a circuit board connection structure for connecting with a dual-sided display device. The circuit board connection structure includes a flexible circuit board 400 and a printed circuit board 500. The flexible circuit board 400 includes a first surface 401 disposed opposite to a bonding region 510 of the printed circuit board 500; the flexible circuit board 400 has a first output end 410 at one end of the first surface 401, a second output end 420 at the other end, and an input end 430 between the first output end 410 and the second output end 420, wherein the input end 430 is bound to the binding region 510 of the printed circuit board 500. The Printed circuit board 500 is, for example, a pcb (printedcuit board), and the flexible circuit board 400 is, for example, an fpc (flexible Printed circuit).

Specifically, the input terminal 430 is located in the middle of the first surface 401 of the flexible circuit board 400, for example, so that the first output terminal 410 and the second output terminal 420 at two ends are respectively connected with two display panels oppositely arranged in the dual-sided display device in a binding manner. If the distance between the first output terminal 410 and the second output terminal 420 is too close, the subsequent two-terminal binding process may not be convenient.

The flexible circuit board 400 disclosed in this embodiment is a single-layer integrated design, and includes two output terminals 410/420 and an input terminal 430 located between two output terminals 410/420, the input terminal 430 is bound and connected to a printed circuit board 500, and the first output terminal 410 and the second output terminal 420 at two ends of the flexible circuit board 400 are bound and connected to two display panels disposed opposite to each other in a dual-sided display device, respectively. Therefore, double-sided display of the double-sided display device can be realized only by one circuit board connecting structure, so that the cost is reduced and the use is more convenient and faster; meanwhile, the flexible circuit board 400 is designed as a single layer, so that the cost and the design difficulty of the flexible circuit board 400 can be further reduced.

In this embodiment, the input terminal 430 of the flexible circuit board 400 includes a first conductive terminal 431 and a second conductive terminal 432, which are disposed in parallel, the first conductive terminal 431 is in communication with the line of the first output terminal 410, and the second conductive terminal 432 is in communication with the line of the second output terminal 420. The bonding region 510 of the printed circuit board 500 includes a third conductive terminal 511 and a fourth conductive terminal 512 arranged in parallel; the first conductive terminal 431 of the flexible circuit board 400 is bound and connected with the third conductive terminal 511 of the printed circuit board 500, and the second conductive terminal 432 of the flexible circuit board 400 is bound and connected with the fourth conductive terminal 512 of the printed circuit board 500.

If the first conductive terminals 431 and the second conductive terminals 432 are simply arranged in parallel and staggered one by one, the area of the binding region is large, which increases the difficulty of the binding process, and also affects the size of the flexible circuit board 400, thereby increasing the production cost. Therefore, the first conductive terminal 431 and the second conductive terminal 432 are disposed in parallel, which can reduce the binding area between the flexible circuit board 400 and the printed circuit board 500, facilitate the binding process, and further reduce the cost of the flexible circuit board 400.

In other embodiments, the input end 430 of the flexible circuit board 400 and the bonding area 510 of the printed circuit board 500 may also be provided with three or more rows of conductive terminals, and the first output end 431 and the second output end 432 are respectively in conduction with the three or more rows of conductive terminals of the input end 430, which is not limited herein.

In this embodiment, the conductive terminals corresponding to the first output terminal 431 and the second output terminal 432 are designed in parallel, and the conductive terminals in the binding region 510 are designed in parallel, so that the dual-signal output of the flexible circuit board 400 can be realized by only one binding process, thereby further simplifying the process difficulty.

In the present embodiment, the first conductive terminal 431, the second conductive terminal 432, the third conductive terminal 511 and the fourth conductive terminal 512 respectively include a plurality of gold fingers arranged at intervals; the gold fingers of the first conductive terminal 431 and the gold fingers of the second conductive terminal 432 are staggered, the gold fingers of the third conductive terminal 511 correspond to the gold fingers of the first conductive terminal 431 in position, and the gold fingers of the fourth conductive terminal 512 correspond to the gold fingers of the second conductive terminal 432 in position. The length of the whole golden finger can be increased by the arrangement, namely, the effective contact area of the golden finger is increased, and the binding stability is further improved.

In this embodiment, the first output terminal 431 and the second output terminal 432 also include a plurality of gold fingers arranged at intervals.

The circuit board connection structure disclosed in this embodiment, because the flexible circuit board 400 is disposed at both ends of the binding region 510 of the printed circuit board 500, the binding region 510 is preferably disposed in the middle of the printed circuit board 500, the binding region 510 further includes the third conductive terminal 511 and the fourth conductive terminal 512 which are disposed in parallel, both ends of two rows of gold fingers are raised by the covering, the contact area may be reduced, and by disposing the two rows of gold fingers in a staggered manner, the length of the whole gold finger is correspondingly increased, so that the effective contact area of the gold finger is increased, and the binding stability is further improved.

In this embodiment, the printed circuit board 500 is further provided with a signal input terminal 520, and the signal input terminal 520 is electrically connected to the line of the bonding area 510; the signal input terminal 520 receives a set of driving signals and transmits the driving signals to the first output terminal 410 and the second output terminal 420 of the flexible circuit board 400 through the third conductive terminal 511 and the fourth conductive terminal 512, respectively. Specifically, the signal inputs 520 receive the driving signals, for example, through the connectors 530, respectively.

The circuit board connection structure disclosed in this embodiment only needs to input a set of driving signals to the signal input terminal 520 through the connector 530, and connects two display panels oppositely arranged in the double-sided display device through the two rows of conductive terminals arranged in parallel in the binding region 510, so that the two display panels can simultaneously display the same or different resolution/pictures.

In this embodiment, since the flexible circuit board 400 has a long bar structure, the first output terminal 410 and the second output terminal 420 are respectively located at two ends of the long bar structure. Therefore, the first output terminal 410 can be bound to a display panel, the input terminal 430 can be bound to the printed circuit board 500, and the second output terminal 420 can be bound to another display panel. Finally, the other end of the flexible printed circuit board 400 is wound around the printed circuit board 500, so that the two display panels are oppositely arranged and assembled with the backlight module, thereby realizing the double-sided display of the double-sided display device.

Compared with the prior art, the circuit board connecting structure disclosed by the embodiment also has the following beneficial effects: the circuit board connecting structure disclosed in the embodiment is only provided with the flexible circuit board and the printed circuit board, and the flexible circuit board is in a single-layer integrated design, so that double-sided display of the double-sided display device can be realized only by one circuit board connecting structure, the cost is further reduced, and the use is more convenient; meanwhile, the double-signal output of the flexible circuit board is realized by one-time binding process, so that the process difficulty is further simplified; through this two rows of conductive terminals of binding district parallel arrangement, connect two display panel that set up relatively among the two-sided display device respectively, can realize that two display panel show the demonstration of the same or different resolution ratio/picture simultaneously, whole collocation nature is good, and concrete higher practicality has promoted the function and the market competition of product greatly.

Example two

Fig. 5 is a schematic view of an overall structure of a circuit board connection structure according to a second embodiment of the present invention.

As shown in fig. 5, the circuit board connection structure disclosed in this embodiment is substantially the same as the circuit board connection structure disclosed in the first embodiment, except that: the circuit board connection structure disclosed in this embodiment bypasses the other end of the flexible circuit board 400 around the printed circuit board 500 and makes the second output end 420 correspond to the first output end 410, so as to facilitate the subsequent binding connection with two display panels oppositely disposed in the dual-sided display device.

In this embodiment, the surface of the printed circuit board 500 away from the bonding region 510 is further provided with a reinforcing region 540, and the other end of the flexible circuit board 400 is wound around the printed circuit board 500 and fixed with the reinforcing region 540. The reinforcing region 540 is provided with a double-sided tape (not shown), for example, and the other end of the flexible circuit board 400 is adhered to the printed circuit board 500 through the double-sided tape of the reinforcing region 540, so that the flexible circuit board 400 itself is reinforced, the thickness of the double-sided tape can be 0.01-0.1mm, which can ensure firm adhesion without affecting the overall thickness, and the preferred thickness can be 0.05 mm.

Since the flexible circuit board 400 has a bent structure, the first output end 410 and the second output end 420 are respectively located at two ends of the long structure. Therefore, the first output terminal 410 can be bound and connected to a display panel, the input terminal 430 can be bound and connected to the pcb 500, the second terminal of the flexible pcb 400 can be fixed to the pcb 500 by the double-sided tape of the reinforcement area 540 by bypassing the pcb 500, and the second output terminal 420 can be bound and connected to another display panel. And finally, assembling the two opposite display panels and the backlight module to realize double-sided display of the double-sided display device.

Compared with the prior art, the circuit board connecting structure disclosed by the embodiment also has the following beneficial effects: in the circuit board connection structure disclosed in this embodiment, since the reinforcing region is further provided on one side of the printed circuit board, the second end of the flexible circuit board is fixed on the printed circuit board by the double-sided adhesive tape, so that the binding stability can be further strengthened.

EXAMPLE III

Fig. 6 is a schematic structural diagram of a dual-sided display device disclosed in the third embodiment of the present invention.

As shown in fig. 2, fig. 3, fig. 5 and fig. 6, the present embodiment further discloses a dual-sided display device, which includes a first display panel 100 and a second display panel 200 that are disposed oppositely, and a backlight module 300 that is sandwiched between the first display panel 100 and the second display panel 200. The backlight module 300 includes a first light emitting surface 310 and a second light emitting surface 320, the first light emitting surface 310 is disposed opposite to the first display panel 100, the second light emitting surface 320 is disposed opposite to the second display panel 200, and the backlight module 300 is configured to provide backlight sources for the first display panel 100 and the second display panel 200 at the same time.

In this embodiment, the dual-sided display device further includes, for example, the circuit board connection structure described in the second embodiment; the flexible circuit board 400 is of a bent structure, the first output end 410 is bound and connected with the first pad 101 of the first display panel 100 through anisotropic conductive adhesive, the second output end 420 of the flexible circuit board 400 bypasses the printed circuit board 500 and is bound and connected with the second pad 201 of the second display panel 200 through anisotropic conductive adhesive, and the first pad 101 and the second pad 201 are both located in a non-display area. The double-sided display device further includes a light-shielding mylar 600 for shielding light leakage at the edge of the double-sided display device, wherein the light-shielding mylar 600 covers the non-display area on the light-emitting surface of the second display panel 200 to the non-display area on the light-emitting surface of the first display panel 100.

In this embodiment, the first conductive terminal 431 and the second conductive terminal 432 of the flexible circuit board 400 correspondingly transmit the set of driving signals to the first display panel 100 and the second display panel 200, so that the first display panel 100 and the second display panel 200 which are oppositely arranged can simultaneously display the same or different image contents.

Specifically, if the first display panel 100 and the second display panel 200 are required to simultaneously display the same image content, it is only required to set the driving signal transmitted to the first conductive terminal 431 and the driving signal transmitted to the second conductive terminal 432 to be the same driving signal, and form a set of driving signals according to the positions of the gold fingers staggered and separated by the first conductive terminal 431 and the second conductive terminal 432. If the first display panel 100 and the second display panel 200 are required to display different image contents at the same time, it is only required to set the driving signal transmitted to the first conductive terminal 431 and the driving signal transmitted to the second conductive terminal 432 to different driving signals, and a set of driving signals is formed according to the positions of the gold fingers staggered and separated by the first conductive terminal 431 and the second conductive terminal 432. Therefore, the double-sided display device disclosed in the embodiment can realize double-sided same-picture or different-picture display only by providing a group of driving signals, and the double-sided display device is relatively good in overall collocation.

In the present embodiment, the first display panel 100 includes an upper substrate 110, a lower substrate 120, and a liquid crystal layer 130 sandwiched between the upper substrate 110 and the lower substrate 120. The second display panel 200 also includes an upper substrate 210, a lower substrate 220, and a liquid crystal layer 230 interposed between the upper substrate 210 and the lower substrate 220. The first pads 101 of the first display panel 100 and the second pads 201 of the second display panel 200 are located on the respective lower substrates 120/220.

In this embodiment, the first display panel 100 and the second display panel 200 are both amorphous silicon thin film transistor liquid crystal display devices. In other embodiments, the first display panel 100 and the second display panel 200 may also be low temperature polysilicon thin film transistor liquid crystal display devices. And are not intended to be limiting herein.

In this embodiment, the first display panel 100 is further provided with a first driving chip (not shown) for driving the first display panel 100, and the second display panel 200 is further provided with a second driving chip (not shown) for driving the second display panel 200. Specifically, the first and second driver chips are assembled on the lower substrate 120 of the first display panel 100 and the lower substrate 220 of the second display panel 200 by Chip On Glass (COG) technology.

In other embodiments, the dual-sided display device may also include the circuit board connection structure as described in the first embodiment. And will not be described in detail herein.

Compared with the prior art, the double-sided display device disclosed by the embodiment also has the following beneficial effects: the double-sided display device disclosed in the embodiment comprises the circuit board connecting structure, only one flexible circuit board and one printed circuit board are arranged, the flexible circuit board is designed in a single-layer integrated mode, double-sided display of the double-sided display device can be achieved through only one circuit board connecting structure, cost is further reduced, and the double-sided display device is more convenient to use; meanwhile, the double-signal output of the flexible circuit board is realized by one-time binding process, so that the process difficulty is further simplified; through this two rows of conductive terminals of binding district parallel arrangement, connect two display panel that set up relatively among the two-sided display device respectively, can realize that two display panel show the demonstration of the same or different resolution ratio/picture simultaneously, whole collocation nature is good, and concrete higher practicality has promoted the function and the market competition of product greatly.

The foregoing is a complete disclosure of the present invention, and in this specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including other elements not expressly listed, in addition to those elements listed.

In the present specification, the terms of front, rear, upper, lower and the like are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only used for the sake of clarity and convenience in technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that are within the spirit of the present invention are intended to be included therein.

Claims (10)

1. A circuit board connection structure comprises a flexible circuit board and a printed circuit board, wherein the flexible circuit board comprises a first surface which is arranged opposite to a binding area of the printed circuit board; the flexible circuit board is characterized in that one end of the first surface of the flexible circuit board is provided with a first output end, the other end of the flexible circuit board is provided with a second output end, an input end is further arranged between the first output end and the second output end, the input end at least comprises a first conductive terminal and a second conductive terminal which are arranged in parallel, the first conductive terminal is communicated with a circuit of the first output end, and the second conductive terminal is communicated with a circuit of the second output end; the binding region of the printed circuit board at least comprises a third conductive terminal and a fourth conductive terminal which are arranged in parallel; the first conductive terminal of the flexible circuit board is bound and connected with the third conductive terminal of the printed circuit board, and the second conductive terminal of the flexible circuit board is bound and connected with the fourth conductive terminal of the printed circuit board.

2. The circuit board connecting structure according to claim 1, wherein the first, second, third and fourth conductive terminals respectively comprise a plurality of gold fingers arranged at intervals; the golden fingers of the first conductive terminal and the golden fingers of the second conductive terminal are arranged in a staggered mode, the golden fingers of the third conductive terminal correspond to the golden fingers of the first conductive terminal in position, and the golden fingers of the fourth conductive terminal correspond to the golden fingers of the second conductive terminal in position.

3. A circuit board connection structure as set forth in claim 1, wherein the other end of said flexible circuit board is passed around said printed circuit board and said second output terminal is made to correspond to said first output terminal.

4. The circuit board connecting structure according to claim 3, wherein the printed circuit board is provided with a reinforcing region on a surface thereof remote from the bonding region, and the other end of the flexible circuit board is wound around the printed circuit board and fixed to the reinforcing region.

5. The circuit board connecting structure according to claim 1, wherein a signal input terminal is further provided on the printed circuit board, the signal input terminal being in conduction with the wiring of the bonding area; the signal input end receives a group of driving signals and respectively transmits the driving signals to the first output end and the second output end of the flexible circuit board through the third conductive terminal and the fourth conductive terminal.

6. A double-sided display device comprises a first display panel, a second display panel and a backlight module, wherein the first display panel and the second display panel are arranged oppositely, and the backlight module is clamped between the first display panel and the second display panel; characterized by further comprising the circuit board connection structure according to any one of claims 1 to 5;

the first output end of the flexible circuit board is in binding connection with the first bonding pad of the first display panel, and the second output end of the flexible circuit board bypasses the printed circuit board and is in binding connection with the second bonding pad of the second display panel; the first bonding pad and the second bonding pad are both located in a non-display area.

7. The dual-sided display device of claim 6, wherein the first conductive terminal and the second conductive terminal of the flexible circuit correspondingly transmit a set of driving signals to the first display panel and the second display panel, so that the first display panel and the second display panel which are oppositely arranged can simultaneously display the same or different image contents.

8. The dual-sided display device of claim 6, wherein the first display panel and the second display panel respectively comprise an upper substrate, a lower substrate, and a liquid crystal layer interposed between the upper substrate and the lower substrate.

9. The dual-sided display device of claim 8, wherein the first pad of the first display panel and the second pad of the second display panel are located on the lower substrate.

10. The dual-sided display device of claim 8, wherein the first display panel is further provided with a first driving chip for driving the first display panel, and the second display panel is further provided with a second driving chip for driving the second display panel; the first driving chip and the second driving chip are both located on the lower substrate.

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