CN215648057U - Flexible circuit board, display screen and mobile terminal - Google Patents
Flexible circuit board, display screen and mobile terminal Download PDFInfo
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- CN215648057U CN215648057U CN202121170194.1U CN202121170194U CN215648057U CN 215648057 U CN215648057 U CN 215648057U CN 202121170194 U CN202121170194 U CN 202121170194U CN 215648057 U CN215648057 U CN 215648057U
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- circuit board
- shielding
- data line
- shielding piece
- wiring board
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Abstract
The utility model discloses a flexible circuit board, a display screen and a mobile terminal, wherein the flexible circuit board comprises a circuit board main body, a data wire and a shielding piece, the circuit board main body comprises a bending area, the data wire is fixedly arranged on the circuit board main body, and the data line at least partially passes through the bending region, the shielding piece comprises a first shielding piece arranged in the bending region, the first shielding piece at least covers part of the data line of the bending area, the width of the first shielding piece is smaller than that of the bending area, by arranging the first shielding piece to cover part of the data line in the bending area, the bounce force is reduced on the premise of ensuring the electromagnetic shielding, compared with the scheme of integrally covering the bending area, the flexible printed circuit board has the advantages that the average thickness is smaller, the bounce is reduced, the tearing risk is reduced, the stability is improved, in addition, the using amount of the shielding part is reduced, and the production cost of the flexible printed circuit board is reduced.
Description
Technical Field
The utility model relates to the technical field of production and assembly of electronic products, in particular to a flexible circuit board, a display screen and a mobile terminal.
Background
At present, smart phones are developed rapidly, and the smart phones are made larger and narrower, but on the contrary, more and more functions are provided. As such, the structure of the mobile phone is more precise, the mutual interference between the modules is stronger and stronger, and the reliability requirement is higher accordingly. In order to solve the problem of electromagnetic interference of the flexible circuit board, the bending area of the circuit board main body is often selected to be provided with a shielding piece, when the bending area is provided with the shielding piece, due to the thickness, size, shape and other reasons of the shielding piece, the thickness of the bending area of the circuit board main body can be increased, the hardness of the flexible circuit board is enhanced, the bounce force is larger when the flexible circuit board is bent, the bending difficulty is larger, and the tearing risk is easy to generate.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a flexible circuit board, a display screen and a mobile terminal, and aims to improve the stability of the flexible circuit board with an electromagnetic shielding function.
In order to achieve the above object, the present invention provides a flexible printed circuit, including:
the circuit board comprises a circuit board main body and a circuit board connecting part, wherein the circuit board main body comprises a bending area;
the data line is fixedly arranged on the circuit board main body, and at least part of the data line penetrates through the bending area; and the number of the first and second groups,
the shielding piece, the shielding piece including set up in the first shielding piece in district of buckling, first shielding piece cover at least in the part in district of buckling on the data line, and lay and establish the width of the shielding piece in district of buckling is less than the width in district of buckling.
Optionally, the first shield completely covers the data line of the inflection region.
Optionally, the data line at least includes a MIPI line, the first shielding member completely covers the MIPI line, and a projected area of the MIPI line on the circuit board main body is the same as that of the first shielding member.
Optionally, the first shield comprises an electromagnetic shielding film.
Optionally, the width of the first shielding element is between one half and one seventh of the width of the bending region.
Optionally, the data line and the first shielding member are glued.
Optionally, the thickness of the shielding film is 12 μm to 18 μm.
Optionally, the thickness of the shielding film is 15 μm.
Optionally, the first shield comprises an insulating tape.
In order to achieve the above object, the present invention further provides a display screen, including the flexible circuit board as described in any one of the above.
To achieve the above object, the present invention further provides a mobile terminal including the display screen as described above.
In the technical scheme of the utility model, the shielding part comprises a first shielding part arranged in the bending area, the first shielding part at least covers part of the data line in the bending area, and the width of the first shielding part is smaller than that of the bending area, so that the bending area of the circuit board main body is partially covered by the first shielding part.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a flexible circuit board provided in the present invention;
fig. 2 is a schematic application diagram of fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
10 | Circuit board |
| 11 | |
20 | |
| 15 | |
12 | Non-bending |
| 1 | |
13 | |
| 22 | |
23 | |
| 14 | Copper leakage |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, 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, 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.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In view of this, the present invention provides a flexible circuit board 100, fig. 1 to fig. 2 are an embodiment of the flexible circuit board 100 provided by the present invention, please refer to fig. 1 to fig. 2, the flexible circuit board 100 includes a circuit board main body 10, a data line and a shielding member 20, the circuit board main body 10 includes a bending region 11, please refer to fig. 2, a portion overlapping with a mobile phone housing 1 is the bending region 11, a portion of the flexible circuit board 100 outside the mobile phone housing 1 is a non-bending region 12, the bending region 11 has a direction movable toward or away from the mobile phone housing 1, it should be noted that the bending region 11 is generally used for laying the data line and an antenna, when the data line and the antenna simultaneously receive two electromagnetic waves with a small frequency difference, the interference between the two electromagnetic waves may be caused, for example, when the mobile phone is in a call, surfing and touch operation, the call quality may be affected, Speed of surfing the internet, touch experience, and the like.
The data line fixed mounting in on the circuit board main part 10, just the data line at least part passes bend region 11, the shielding piece including set up in bend region 11's first shielding piece 22, first shielding piece 22 cover at least in bend region 11's part on the data line, and the width of first shielding piece 22 is less than bend region 11's width. The general flexible circuit board is provided with a shielding piece which is mainly arranged in the non-bending area 12, and the second shielding piece 23 is arranged in the non-bending area 12, so that when a display device such as a mobile phone is interfered by signals of the display device or other devices, the shielding piece can isolate external signals, prevent the external signals from being interfered by line transmission, and further improve the communication quality. The first shielding member 22 in the present application may be integrally disposed with the second shielding member 23, or may be separately disposed from the second shielding member 23, which is not limited herein, and in this embodiment, in order to reduce the processing steps and save the cost, the first shielding member 22 and the second shielding member 23 are integrally disposed.
In addition, the second shielding member 23 does not cover the non-bending region 12 completely, and a part of the region is generally left uncovered to form the device region 13 for mounting some devices that cannot be shielded by the battery. The non-bending area 12 is further provided with a copper leakage 14 and a backlight interface 15, and the copper leakage 14 is used for being grounded with the whole machine.
It should be noted that EMI interference, that is, electromagnetic interference, mainly interferes with the data transmission of the flexible circuit board 100, so as to interfere with the display of the mobile phone screen, and therefore, it can be understood that there are many data lines on the flexible circuit board, wherein most of the data lines do not cause electromagnetic interference, and only the data lines that play a role in data transmission such as images and sounds cause electromagnetic interference, and the electromagnetic shielding is performed on some data lines of the flexible circuit board 100, so that most of the electromagnetic interference can be effectively avoided.
In the solution of the present embodiment, by providing the shielding element 20, the shielding element comprises a first shielding element 22 provided at said inflection zone 11, the first shielding element 22 covers at least a portion of the data line of the bending region 11, and the width of the first shielding element 22 is smaller than the width of the bending region 11, so that the first shield 22 partially covers the bending region 11 of the circuit board main body 10, thereby securing the electromagnetic shielding effect, in a case where the size of the first shield 22 is appropriately reduced, the width of the first shield 22 is set to be smaller than the width of the inflection region 11, so that the first shield 22 partially covers the inflection zones 11 of the circuit board body 10, the first shield may be provided with a shielding effect that is different from the shielding effect provided by the first shield 22, the average thickness is smaller, the bounce force is reduced, the tearing risk is reduced, the stability is improved, and the amount of the first shield 22 is reduced, thereby reducing the production cost of the flexible wiring board 100.
Of course, the first shielding member 22 may also completely cover the data line of the bending region 11, so as to avoid the occurrence of the electromagnetic shielding phenomenon to the maximum extent, and also avoid the occurrence of the mutual influence or the electric leakage of the data line because a part of the data line is not covered, and the data line may only occupy a partial position in the bending region 11, even if the data line in the bending region 11 is completely covered, the width of the first shielding member 22 is much smaller than the width of the bending region 11, and the influence on the bounce force is also small.
Furthermore, the existing data line playing the image transmission function mainly adopts an MIPI line, that is, a mobile industry processor interface line, and therefore, the data line at least includes the MIPI line, so that the phenomenon of electromagnetic interference can be effectively avoided by performing electromagnetic shielding on the MIPI line.
Still further, the first shielding member 22 completely covers the MIPI wire, and the projected area of the MIPI wire on the circuit board main body 10 is the same as that of the first shielding member 22, so that the first shielding member 22 just completely covers the MIPI wire, the coverage area is reduced to the maximum extent while the electromagnetic interference is reduced, and the bounce of the bending region 11 is not affected.
The choice of the first shielding member 22 can be various, such as an electromagnetic shielding film, an insulating tape, etc., in this embodiment, for better shielding effect, the electromagnetic shielding film is mainly used for electromagnetic shielding, because the electromagnetic shielding film has better electromagnetic shielding effect compared to the insulating tape. Of course, for easy installation, the first shielding member 22 includes an insulating tape, which has a slightly poorer electromagnetic shielding effect than the electromagnetic shielding film, but can be directly attached to the data line, thereby reducing the installation difficulty.
Further, electromagnetic shielding film's mounting means can have a great variety, can be the joint, the crimping, in order to reduce the installation degree of difficulty, installs through the scheme of gluing between data line and the shield 20.
Generally, the width of the data line functioning as the image transmission function, such as an MIPI line, is between one seventh to one sixth of the width of the bending region 11 of the circuit board main body 10, therefore, the width of the first shielding member 22 is not too large, which may cause the thickness of the bending region 11 of the circuit board main body 10 to increase, so that the hardness of the flexible circuit board 100 may be enhanced, on one hand, the bounce may be increased, thereby enhancing the bending difficulty, on the other hand, the tearing risk may be easily generated, the stability is poor, and also the width may not be too small, which may not completely cover the data line functioning as the image transmission function, thereby causing the electromagnetic shielding effect to be poor, therefore, the width of the first shielding member 22 is between one half to one seventh of the width of the bending region 11, thereby maximally reducing the thickness of the bending region 11 of the circuit board main body on the premise of ensuring the electromagnetic shielding effect, reducing the rebound force, avoiding the tearing risk and improving the stability.
On the other hand, the thickness of electromagnetic shielding film can not be too big, otherwise can lead to the increase of the thickness of the bending region 11 of the circuit board main body 10 for the hardness of the flexible circuit board 100 is strengthened, on the one hand, the bounce can be increased, thereby strengthening the difficulty of bending, on the other hand, the tearing risk is easily generated, the stability is poor, and also can not be too small, too small can reduce the electromagnetic shielding effect, preferably, the thickness of electromagnetic shielding film is 12 μm-18 μm, thereby under the prerequisite of guaranteeing the electromagnetic shielding effect, the thickness of the bending region 11 of the circuit board main body is reduced to the greatest extent, the bounce is reduced, the tearing risk is avoided, and the stability is improved. Further, the thickness of the existing commercially available electromagnetic shielding film is mainly 15 μm, and in order to easily obtain the shielding film 21, the thickness of the shielding film 21 is 15 μm, thereby making the shielding film 21 easily available.
In addition, in order to achieve the above object, the present application also proposes a display screen, which includes the flexible wiring board 100 as described in any one of the above.
To achieve the above object, the present invention further provides a mobile terminal including the display screen as described above.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A flexible wiring board, comprising:
the circuit board comprises a circuit board main body and a circuit board connecting part, wherein the circuit board main body comprises a bending area;
the data line is fixedly arranged on the circuit board main body, and at least part of the data line penetrates through the bending area; and the number of the first and second groups,
the shielding piece, the shielding piece including set up in the first shielding piece in district of buckling, first shielding piece covers at least in the part in district of buckling on the data line, and the width of first shielding piece is less than the width in district of buckling.
2. The flexible wiring board of claim 1, wherein said first shield completely covers said data lines in the flex area.
3. The flexible wiring board of claim 2, wherein the data lines include at least MIPI lines, the first shield completely covers the MIPI lines, and the MIPI lines have the same projected area on the wiring board body as the first shield.
4. The flexible wiring board of any of claims 1 or 2, wherein the first shield comprises an electromagnetic shielding film.
5. The flexible wiring board of claim 4, wherein the width of the first shield is between one-half and one-seventh of the width of the inflection region.
6. The flexible wiring board of claim 4, wherein said data line is adhesively bonded to said first shield.
7. The flexible wiring board of claim 4, wherein the thickness of said shielding film is 12 μm to 18 μm.
8. The flexible wiring board of claim 1, wherein the first shield comprises an insulating tape.
9. A display screen, characterized by comprising the flexible wiring board according to any one of claims 1 to 8.
10. A mobile terminal characterized by comprising a display screen according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121170194.1U CN215648057U (en) | 2021-05-27 | 2021-05-27 | Flexible circuit board, display screen and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121170194.1U CN215648057U (en) | 2021-05-27 | 2021-05-27 | Flexible circuit board, display screen and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215648057U true CN215648057U (en) | 2022-01-25 |
Family
ID=79940416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121170194.1U Active CN215648057U (en) | 2021-05-27 | 2021-05-27 | Flexible circuit board, display screen and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215648057U (en) |
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2021
- 2021-05-27 CN CN202121170194.1U patent/CN215648057U/en active Active
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