阅读说明：本技术 Ffc线缆和电子设备 (FFC cable and electronic equipment ) 是由 迟浩功 宋国永 王天功 于 2019-03-20 设计创作，主要内容包括：本发明实施例提供一种FFC线缆和电子设备,包括：FFC本体和屏蔽层,FFC本体包括金属线和包覆至少部分金属线的绝缘层,屏蔽层设置在绝缘层的一侧；其中,金属线包括信号线和地线,至少部分地线裸露在绝缘层外部,裸露的地线与屏蔽层抵接；本实施例中,通过将屏蔽层与FFC本体内的地线接触,使得FFC线缆的总体辐射能量降低,提高了FFC线缆的EMC指标和信号完整性指标；另外,还降低了FFC线缆的工艺实现复杂度。(An embodiment of the present invention provides an FFC cable and an electronic device, including: the FFC comprises an FFC body and a shielding layer, wherein the FFC body comprises a metal wire and an insulating layer wrapping at least part of the metal wire, and the shielding layer is arranged on one side of the insulating layer; the metal wire comprises a signal wire and a ground wire, at least part of the ground wire is exposed outside the insulating layer, and the exposed ground wire is abutted to the shielding layer; in the embodiment, the shielding layer is contacted with the ground wire in the FFC body, so that the total radiation energy of the FFC cable is reduced, and the EMC index and the signal integrity index of the FFC cable are improved; in addition, the process implementation complexity of the FFC cable is reduced.)

1. An FFC cable, comprising: the FFC comprises an FFC body and a shielding layer, wherein the FFC body comprises a metal wire and an insulating layer wrapping at least part of the metal wire, and the shielding layer is arranged on one side of the insulating layer;

the metal wire comprises a signal wire and a ground wire, at least part of the ground wire is exposed outside the insulating layer, and the exposed ground wire is abutted to the shielding layer.

2. The FFC cable of claim 1, wherein a thickness of the ground line is larger than a thickness of the signal line, and an end surface of one end of the ground line extending in a thickness direction with respect to the signal line is exposed outside the insulating layer.

3. The FFC cable of claim 1, wherein the length of the ground wire is greater than the length of the insulating layer, at least one end of the ground wire in the length direction is folded and arranged outside the insulating layer, and the ground wire of the folded part is abutted to the shielding layer.

4. The FFC cable of claim 1, wherein the ground wires comprise a first ground wire and a second ground wire, the second ground wire is attached to the first ground wire, the length of the second ground wire is greater than that of the insulating layer, at least one end of the second ground wire in the length direction is folded and arranged outside the insulating layer, and the second ground wire of the folded and folded portion is abutted to the shielding layer.

5. The FFC cable of claim 1, wherein the ground wires comprise a first ground wire and a second ground wire, the first ground wire and the signal wire are wrapped in the insulating layer, the second ground wire is disposed outside the insulating layer and opposite to the first ground wire, the first ground wire and the second ground wire are both longer than the insulating layer, two ends of the second ground wire are respectively connected with two ends of the first ground wire, and the second ground wire abuts against the shielding layer.

6. The FFC cable of claim 1, wherein the ground wire is exposed at an edge of the insulating layer, and the shielding layer is folded along a predetermined direction to wrap the ground wire, wherein the predetermined direction is a direction perpendicular to the ground wire.

7. The FFC cable of any one of claims 1-6, further comprising a stiffener disposed at both ends of the FFC body.

8. The FFC cable of any one of claims 1-6, wherein the shielding layer is an aluminum foil shielding layer.

9. The FFC cable of any one of claims 1-6, wherein the insulating layer is a PET insulating layer.

10. An electronic device comprising the FFC cable of any one of claims 1 to 9.

Technical Field

The embodiment of the invention relates to the technical field of electronics, in particular to an FFC cable and electronic equipment.

Background

FFC (Flexible Flat Cable) is one kind with insulating material and extremely thin wire, through the novel data Cable that high-tech automation equipment production line pressfitting formed, has advantages such as soft, bending folding at will, thickness is thin, small, connect simple, dismantle convenience. The FFC cable has stable impedance and is inexpensive, so that the FFC cable is widely applied to various electronic products, for example: in a television terminal product, the main board and the screen driving board, the main board and the screen display board, and the screen driving board and the screen display board are connected by FFC cables.

The FFC cable includes a metal wire and an insulating layer, the metal wire being covered inside the insulating layer. Generally, a shielding layer is arranged on one side of the insulating layer, and the shielding layer is designed to be grounded so as to reduce the space radiation amount of the FFC cable. In the prior art, when the shielding layer is designed to be grounded, it is required to ensure that a connector of a circuit board to which the FFC cable is connected is provided with a grounding point, so that the shielding layer is grounded by means of the grounding point on the circuit board connector.

However, the shield layer of the FFC cable in the prior art is grounded, so that EMC and signal integrity of the FFC cable are not good.

Disclosure of Invention

The embodiment of the invention provides an FFC cable and electronic equipment, which are used for improving EMC and signal integrity of the FFC cable.

In a first aspect, an FFC cable provided in an embodiment of the present invention includes: the FFC comprises an FFC body and a shielding layer, wherein the FFC body comprises a metal wire and an insulating layer wrapping at least part of the metal wire, and the shielding layer is arranged on one side of the insulating layer;

the metal wire comprises a signal wire and a ground wire, at least part of the ground wire is exposed outside the insulating layer, and the exposed ground wire is abutted to the shielding layer.

Optionally, the thickness of the ground line is greater than that of the signal line, and an end surface of one end of the ground line, which extends in the thickness direction with respect to the signal line, is exposed outside the insulating layer.

Optionally, the length of the ground wire is greater than that of the insulating layer, at least one end of the ground wire in the length direction is folded and arranged outside the insulating layer, and the ground wire of the folded portion is abutted to the shielding layer.

Optionally, the ground wire includes a first ground wire and a second ground wire, the second ground wire is attached to the first ground wire, the length of the second ground wire is greater than that of the insulating layer, at least one end of the second ground wire along the length direction is folded and arranged outside the insulating layer, and the second ground wire of the folded portion is abutted to the shielding layer.

Optionally, the ground wire includes a first ground wire and a second ground wire, the first ground wire and the signal wire are covered in the insulating layer, the second ground wire is disposed outside the insulating layer and opposite to the first ground wire, the lengths of the first ground wire and the second ground wire are both greater than the length of the insulating layer, two ends of the second ground wire are respectively connected with two ends of the first ground wire, and the second ground wire is abutted to the shielding layer.

Optionally, the ground wire is exposed at the edge of the insulating layer, the shielding layer is folded along a preset direction to wrap the ground wire, and the preset direction is a direction perpendicular to the ground wire.

Optionally, the FFC further comprises reinforcing plates, and the reinforcing plates are arranged at two ends of the FFC body.

Optionally, the shielding layer is an aluminum foil shielding layer.

Optionally, the insulating layer is a PET insulating layer.

In a second aspect, an embodiment of the present invention provides an electronic device, including the FFC cable according to any one of the first aspects.

The embodiment of the invention provides an FFC cable and electronic equipment, wherein the FFC cable comprises: the FFC comprises an FFC body and a shielding layer, wherein the FFC body comprises a metal wire and an insulating layer wrapping at least part of the metal wire, and the shielding layer is arranged on one side of the insulating layer; the metal wire comprises a signal wire and a ground wire, at least part of the ground wire is exposed outside the insulating layer, and the exposed ground wire is abutted with the shielding layer; in the embodiment, the shielding layer is contacted with the ground wire in the FFC body, so that the impedance of the first loop is reduced, the current of the first loop is increased, and the current of the second loop is reduced; because the loop area of the second loop is far larger than that of the first loop, the dominant radiation energy of the second loop is far larger than that of the first loop, and the dominant radiation energy of the second loop is reduced by reducing the current of the second loop, so that the total radiation energy of the FFC cable is reduced, and the EMC index and the signal integrity index of the FFC cable are improved; in addition, the process implementation complexity of the FFC cable is reduced.

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, and 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 these drawings without creative efforts.

FIGS. 1A and 1B are schematic views of an FFC cable;

fig. 1C to 1D are schematic structural views of an FFC cable in the prior art;

fig. 2A to fig. 2C are schematic structural diagrams of a first embodiment of an FFC cable provided in the present invention;

fig. 2D to fig. 2F are schematic structural diagrams of a second embodiment of the FFC cable provided in the present invention;

fig. 3 is a schematic current loop diagram of an application scenario of an FFC cable according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a current loop emitting radiant energy;

fig. 5A to 5D are schematic structural views of a third embodiment of an FFC cable provided in the present invention;

fig. 6A to 6C are schematic structural views of a fourth embodiment of the FFC cable provided in the present invention;

fig. 7A to 7C are schematic structural views of a fifth embodiment of an FFC cable provided in the present invention;

fig. 8A to 8B are schematic structural views of a sixth embodiment of an FFC cable provided in the present invention;

FIG. 9A is a schematic illustration of radiated data of a prior art FFC cable;

fig. 9B is a schematic diagram of radiation data of an FFC cable according to a fourth embodiment of the present invention.

Description of reference numerals:

10: a metal wire;

11: a signal line;

12: a ground wire;

121: a first ground line;

122: a second ground line;

20: an insulating layer;

30: a shielding layer;

40: an aluminum foil stiffening plate;

50: aluminum foil or conductive cloth;

60: a reinforcing plate;

70: a golden finger;

100: an FFC cable;

110: a circuit board source end;

120: a circuit board load side;

130: a grounding module backboard.

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.