CN219421149U - Flexible circuit board and display terminal - Google Patents
Flexible circuit board and display terminal Download PDFInfo
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- CN219421149U CN219421149U CN202223372383.4U CN202223372383U CN219421149U CN 219421149 U CN219421149 U CN 219421149U CN 202223372383 U CN202223372383 U CN 202223372383U CN 219421149 U CN219421149 U CN 219421149U
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Abstract
The utility model provides a flexible circuit board and a display terminal, and relates to the technical field of circuit board structures. The flexible circuit board comprises a substrate and a plurality of high-speed signal wires, wherein each high-speed signal wire extends from one end of the substrate to the other end, the high-speed signal wires are arranged in parallel, the high-speed signal wires are provided with bending parts, the bending parts are recessed towards one side of the length direction of the high-speed signal wires, and a window is formed in a recessed area of the bending parts to form a copper exposure area. According to the flexible circuit board and the display terminal provided by the utility model, the high-speed signal wire is provided with the bending part which is sunken towards one side of the length direction of the high-speed signal wire, the sunken area of the bending part is windowed to form the copper exposure area, the requirement of the grounding area of the shielding film is met, meanwhile, a via hole layer is not required to be arranged, and the high-speed signal wire has optimal signal integrity in the aspects of impedance matching and signal difference loss.
Description
Technical Field
The utility model relates to the technical field of circuit board structures, in particular to a flexible circuit board and a display terminal.
Background
In electronic products, flexible circuit boards are often provided to connect different functional modules. As the operating frequency of electronic circuits increases, the radiation effect of high-speed signals on flexible circuit boards increases, and for this purpose, shielding performance of high-speed signals on flexible circuit boards needs to be controlled. The current common shielding scheme is to add a wiring layer, set a signal via hole or adopt a shielding film with higher shielding performance. The former causes an increase in signal difference, and the latter increases the structural cost.
Disclosure of Invention
The utility model provides a flexible circuit board and a display terminal, which are used for solving the defects of high shielding design cost or increased difference loss of the flexible circuit board in the prior art.
The utility model provides a flexible circuit board which comprises a substrate and a plurality of high-speed signal wires, wherein each high-speed signal wire extends from one end of the substrate to the other end of the substrate, and the high-speed signal wires are arranged in parallel, the high-speed signal wires are provided with bending parts, the bending parts are recessed towards one side of the length direction of the high-speed signal wires, and a window is formed in a recessed area of the bending parts to form a copper exposure area.
According to the flexible circuit board provided by the utility model, the bending parts on two adjacent high-speed signal wires are oppositely arranged.
According to the flexible circuit board provided by the utility model, each high-speed signal wire is provided with at least two bending parts.
According to the flexible circuit board provided by the utility model, the high-speed signal wire comprises a main body section, the bending part comprises a straight line section and inclined sections arranged at two ends of the straight line section, the straight line section is parallel to the main body section, and two ends of the straight line section are respectively connected with the main body section through one inclined section.
According to the flexible circuit board provided by the utility model, the high-speed signal line is a differential signal line.
According to the flexible circuit board provided by the utility model, the flexible circuit board further comprises low-speed signal wires, and the low-speed signal wires are distributed along the extending direction of the substrate.
According to the flexible circuit board provided by the utility model, the width of the copper exposure area is not less than 0.8mm.
According to the flexible circuit board provided by the utility model, the number of the high-speed signal wires is five, and the copper exposure area is provided with five.
According to the flexible circuit board provided by the utility model, the substrate is L-shaped.
The utility model also provides a display terminal, which comprises a main board, a display screen and the flexible circuit board, wherein the display screen is provided with a first connector, the main board is provided with a second connector, one end of the flexible circuit board is connected with the first connector, and the other end of the flexible circuit board is connected with the second connector.
According to the flexible circuit board and the display terminal provided by the utility model, the high-speed signal wire is provided with the bending part which is sunken towards one side of the length direction of the high-speed signal wire, the sunken area of the bending part is windowed to form the copper exposure area, the requirement of the grounding area of the shielding film is met, meanwhile, a via hole layer is not required to be arranged, and the high-speed signal wire has optimal signal integrity in the aspects of impedance matching and signal difference loss.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a flexible circuit board according to the present utility model;
FIG. 2 is a schematic diagram of a flexible circuit board according to a second embodiment of the present utility model;
FIG. 3 is an enlarged view of a portion of the structure of the high-speed signal line shown in FIG. 2;
fig. 4 is an internal structural view of the display terminal provided by the present utility model.
Reference numerals:
10. a substrate; 20. a high-speed signal line; 21. a bending part; 30. a copper exposure area; 40. a golden finger; 50. a low-speed signal line; 100. a display screen; 101. a first connector; 110. a main board; 111. and a second connector.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The features of the utility model "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The flexible circuit board of the present utility model is described below with reference to fig. 1-3.
The utility model provides a flexible circuit board, as shown in fig. 1 and 2, the flexible circuit board comprises a substrate 10 and a plurality of high-speed signal wires 20, each high-speed signal wire 20 extends from one end of the substrate 10 to the other end, and the plurality of high-speed signal wires 20 are arranged in parallel. Each high-speed signal line 20 is provided with a bending portion 21, the bending portion 21 is recessed toward one side of the length direction of the high-speed signal line 20, and a window is formed in a recessed area of the bending portion 21 to form a copper exposure area 30.
The substrate 10 is a board body in which conductive lines are etched in the flexible circuit board manufacturing process. For example, the substrate 10 includes an insulating base material and a copper foil, which is covered and bonded on the surface of the insulating base material as a conductor layer. It is understood that the substrate 10 may have other structures, and the present utility model is not particularly limited to the structure of the substrate 10. As shown in fig. 2, two ends of the high-speed signal line 20 are respectively connected with the golden fingers 40, and the width of the substrate 10 is the same as the width of the golden fingers 40, so as to facilitate assembly and save material cost.
A plurality of high-speed signal lines 20 are etched on the substrate 10. Optionally, the high-speed signal lines 20 are differential signal lines, and each differential signal line is composed of two microstrip lines drawn in parallel on the surface layer of the substrate 10 to generate an edge coupling effect. As shown in fig. 2 and 3, each high-speed signal line 20 is provided with a bent portion 21, and the bent portion 21 is recessed toward the left and/or right side of the high-speed signal line 20. Compared with the high-speed signal line 20 arranged by the linear wiring, the area of the exposed copper area 30 formed by windowing is larger in the concave area of the bending part 21 of the high-speed signal line 20, so that the requirement of the grounding area of the shielding film is met. The directions of the depressions of the bent portions 21 in the plurality of high-speed signal lines 20 may be the same or different. For example, each high-speed signal line 20 is provided with two bending parts 21, the concave directions of the two bending parts 21 on the same high-speed signal line 20 are the same, and the concave directions of the bending parts 21 on the adjacent two high-speed signal lines 20 are opposite.
After the high-speed signal line 20 is etched on the substrate 10, a copper exposure area 30 is formed by windowing in a concave area of the bending part 21, and the copper exposure area 30 is directly contacted with the shielding film, so that the shielding performance of the shielding film is ensured. Compared with the traditional mode of adopting a high-frequency shielding film or adding a wiring layer, the flexible circuit board provided by the embodiment of the utility model has the advantages that the bending part 21 is arranged to provide sufficient grounding space for the shielding film during design, so that the maximum efficiency of the shielding film is realized, the wiring layer is not required to be additionally added, or the high-frequency shielding film is adopted, and the manufacturing cost of the flexible circuit board is reduced.
According to the flexible circuit board provided by the embodiment of the utility model, the high-speed signal wire 20 is provided with the bending part 21 recessed to one side of the length direction of the high-speed signal wire 20, the copper exposure area 30 is formed by windowing in the recessed area of the bending part 21, and the requirement of the grounding area of the shielding film is met, meanwhile, a via hole layer replacement is not required to be arranged, so that the flexible circuit board has optimal signal integrity in the aspects of impedance matching and signal difference loss.
In one embodiment of the present utility model, the bent portions 21 on two adjacent high-speed signal lines 20 are disposed opposite to each other.
As shown in fig. 1 and 2, there are five high-speed signal lines 20, and the five high-speed signal lines 20 are sequentially arranged from the left side to the right side of the substrate 10. The bent portions 21 on two adjacent high-speed signal lines 20 are opposite in recess direction and the recess openings are opposite, so that rectangular or O-shaped recess areas are formed between the two adjacent high-speed signal lines 20, sufficient area is provided for the copper exposure area 30 to be opened, and sufficient grounding space is provided for the shielding film. Alternatively, the bent portion 21 on the high-speed signal line 20 closest to the edge of the substrate 10 is recessed toward the inside of the substrate 10. As shown in fig. 1 to 3, the bent portion 21 provided on the leftmost high-speed signal line 20 is recessed inward of the substrate 10.
In the flexible circuit board provided by the embodiment of the utility model, the bending parts 21 on the two adjacent high-speed signal wires 20 are oppositely arranged, so that the area of the copper exposure area 30 is effectively increased, and a sufficient space is provided for grounding of the shielding film.
In an alternative embodiment of the present utility model, at least two bending portions 21 are provided on each high-speed signal line 20.
As shown in fig. 2, the substrate 10 has an L-shape, and the high-speed signal line 20 has an L-shape. The bent portion 21 is provided at a vertical section of the high-speed signal line 20. Two bending parts 21 are arranged at intervals on the vertical sections of the high-speed signal lines 20, and the bending parts 21 in the vertical sections of the two adjacent high-speed signal lines 20 are correspondingly arranged to form an O-shaped or rectangular concave area so as to form a copper exposure area 30 through windowing.
In one embodiment of the present utility model, the high-speed signal line 20 includes a main body section, and the bending portion 21 includes a straight line section and inclined sections disposed at both ends of the straight line section. The straight line section is parallel to the main body section, and two ends of the straight line section are respectively connected with the main body section through an inclined section.
As shown in fig. 2, the high-speed signal line 20 is L-shaped, and the vertical section thereof includes a main body section and a bending portion 21, and the bending portion 21 includes a straight line section and two inclined sections. The two ends of the straight line section are connected with the main body section by the inclined section. Thus, the bent portion 21 has an inverted trapezoid shape.
In another embodiment of the present utility model, the bending portion 21 has a concave shape.
In an embodiment of the present utility model, the flexible circuit board further includes a low-speed signal line 50, and the low-speed signal line 50 is disposed along the extending direction of the substrate 10.
As shown in fig. 2, the substrate 10 has an L-shape, and the low-speed signal line 50 has an L-shape. The vertical section and the horizontal section of the low-speed signal line 50 are straight lines, and the bending portion 21 is not provided.
Wherein the width of the exposed copper region 30 is not less than 0.8mm, subject to process limitations, to provide sufficient space to achieve grounding of the shielding film.
Alternatively, as shown in fig. 1 and 2, there are five high-speed signal lines 20, and five copper-exposed regions 30 are provided. Wherein the number of copper-exposed areas 30 is set as much as possible according to the number that can be set.
In one embodiment of the present utility model, the substrate 10 is L-shaped.
As shown in fig. 4, the control board of the display 100 is spaced from the main board 110, and the extending direction of the first connector 101 on the control board is perpendicular to the extending direction of the second connector 111 on the main board 110. Correspondingly, the substrate 10 is L-shaped to realize connection between the main board 110 and a control board of the display 100.
Of course, the extending direction of the first connector 101 on the control board may be identical to the extending direction of the second connector 111 on the main board 110, and the two connectors are disposed opposite to each other, and at this time, the substrate 10 is a straight board, so that the two connectors can be connected in communication.
The embodiment of the utility model also provides a display terminal, as shown in fig. 4, which comprises a main board 110, a display screen 100 and the flexible circuit board. The display 100 is provided with a first connector 101, and the main board 110 is provided with a second connector 111. One end of the flexible circuit board is connected to the first connector 101, and the other end of the flexible circuit board is connected to the second connector 111.
The two ends of the high-speed signal line 20 are respectively provided with a golden finger 40, wherein one golden finger 40 is connected with the first connector 101, and the other golden finger 40 is connected with the second connector 111.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. The flexible circuit board is characterized by comprising a substrate and a plurality of high-speed signal wires, wherein each high-speed signal wire extends from one end of the substrate to the other end, the high-speed signal wires are arranged in parallel, the high-speed signal wires are provided with bending parts, the bending parts are recessed towards one side of the length direction of the high-speed signal wires, and a windowing copper exposure area is formed in a recessed area of the bending parts.
2. The flexible circuit board of claim 1 wherein said bent portions on adjacent two of said high-speed signal lines are disposed opposite each other.
3. The flexible circuit board of claim 1 wherein at least two of said bends are provided on each of said high speed signal lines.
4. A flexible circuit board according to any one of claims 1 to 3, wherein the high-speed signal line comprises a main body section, the bending portion comprises a straight line section and inclined sections arranged at two ends of the straight line section, the straight line section is parallel to the main body section, and two ends of the straight line section are respectively connected with the main body section through one inclined section.
5. The flexible circuit board of claim 1 wherein the high-speed signal lines are differential signal lines.
6. The flexible circuit board of claim 1, further comprising low-speed signal lines routed along an extension direction of the substrate.
7. The flexible circuit board of claim 1 wherein the copper-exposed region has a width of not less than 0.8mm.
8. The flexible circuit board of claim 7 wherein the high-speed signal lines are five and the copper-exposed area is provided with five.
9. The flexible circuit board of claim 1 wherein the substrate is L-shaped.
10. A display terminal, characterized by comprising a main board, a display screen and the flexible circuit board according to any one of claims 1 to 9, wherein a first connector is arranged on the display screen, a second connector is arranged on the main board, one end of the flexible circuit board is connected with the first connector, and the other end of the flexible circuit board is connected with the second connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223372383.4U CN219421149U (en) | 2022-12-15 | 2022-12-15 | Flexible circuit board and display terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223372383.4U CN219421149U (en) | 2022-12-15 | 2022-12-15 | Flexible circuit board and display terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219421149U true CN219421149U (en) | 2023-07-25 |
Family
ID=87203116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223372383.4U Active CN219421149U (en) | 2022-12-15 | 2022-12-15 | Flexible circuit board and display terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219421149U (en) |
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2022
- 2022-12-15 CN CN202223372383.4U patent/CN219421149U/en active Active
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