CN112086240A

CN112086240A - High-definition data transmission line

Info

Publication number: CN112086240A
Application number: CN202011054240.1A
Authority: CN
Inventors: 黄伟; 彭中朝; 宋强; 李端生; 王庆; 丁建平
Original assignee: Jiangxi Boshuo Electronics Co ltd
Current assignee: Jiangxi Boshuo Electronics Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2020-12-15

Abstract

The invention discloses a high-definition data transmission line, which comprises: a core portion, the core portion including at least a core unit, the core unit including: two signal lines distributed in parallel, wherein the signal lines include: the conductor is formed by stranding 7 tinned copper wires with the diameters of 0.04 +/-0.001 mm; the insulating layer is coated on the conductor and made of an FEP material, wherein the diameter of the insulating layer is 0.31 +/-0.03 mm; the shielding layer is arranged on the outer sides of the two signal wires; and the belting layer is coated on the shielding layer. The transmission line of the invention has good high-frequency characteristics and high transmission picture definition.

Description

High-definition data transmission line

Technical Field

The invention relates to the technical field of cables, in particular to a high-definition data transmission line.

Background

With the acceleration of digital engineering, high-definition video and audio electronic devices are becoming more and more popular, the requirements on data transmission lines are becoming higher and higher, and people are increasingly deepening about the concept of environmental protection, and the traditional data lines cannot completely meet the requirements of digital image technology on high resolution, high transmission rate, high color depth images and digital audio.

In chinese patent application No.: 201820554900.4 discloses an HDMI ultra-high definition extended data transmission line and a die for manufacturing the same. The transmission line comprises a filler, a plurality of signal wire groups, a plurality of electronic wires, a peripheral ground wire, a total shielding layer containing double-layer double-sided metal foils, a double-layer weaving layer and a sheath layer from inside to outside, the signal wire groups are located on the periphery of the filler, the electronic wires are arranged between the two adjacent signal wire groups, the total shielding layer covers the filler, the signal wire groups, the electronic wires and the peripheral ground wire together in a cladding mode from the outside, the double-layer weaving layer covers the total shielding layer on the outside, and the sheath layer covers the double-layer weaving layer on the outside. The mould is used for preparing the transmission line. The signal line group in the technical scheme does not conform to the standard of the association required by the HDMI2.1 high frequency, and the transmission picture is not high definition enough and needs to be further improved.

Disclosure of Invention

In order to solve at least one technical problem in the background art, the invention provides a high-definition data transmission line which meets the Association standard of HDMI2.1 high-frequency requirements, and the displayed picture is clearer and more vivid, the color is richer, the audio-visual effect is better, and the picture delay and pause phenomena are reduced.

The invention provides a high-definition data transmission line, which comprises:

a core portion, the core portion including at least a core unit, the core unit including:

two signal lines distributed in parallel, wherein the signal lines include:

the conductor is formed by stranding 7 tinned copper wires with the diameters of 0.04 +/-0.001 mm;

the insulating layer is coated on the conductor and made of an FEP material, wherein the diameter of the insulating layer is 0.31 +/-0.03 mm;

the shielding layer is arranged on the outer sides of the two signal wires;

and the belting layer is coated on the shielding layer.

Preferably, the shielding layer is formed by weaving tinned copper wires with the diameter of 0.03 +/-0.001 mm, and the weaving pitch is 6.7 +/-0.3 mm.

Preferably, the wrapping layer is made of PTFE material, and the winding pitch of the wrapping layer is 6.0 +/-0.2 mm.

Preferably, the number of the wire core units is 7, and the 7 wire core units are distributed in rows at intervals;

the outside of line core portion still is equipped with first restrictive coating, this first restrictive coating with be provided with first filler between the line core portion.

Preferably, the transmission line further comprises two 2000D first polyester fiber ropes distributed in parallel, wherein 7 core units are located between the two first polyester fiber ropes, and any one of the first polyester fiber ropes is parallel to any one of the core units.

Preferably, the first filler is cotton thread.

The number of the wire core units is 7, the 7 wire core units are parallel to each other, and the other 6 wire core units are positioned around 1 wire core unit;

and a second sheath layer is arranged on the outer side of the wire core part, and a second filler is arranged between the second sheath layer and the wire core part.

Preferably, the transmission line further comprises two 2000D second polyester fiber ropes distributed in parallel. The two second polyester fiber ropes are arranged on two sides of the wire core unit located in the center along the width direction of the wire core unit, and any one of the second polyester fiber ropes is parallel to any one of the wire core units.

Preferably, the second filler is cotton thread.

The beneficial effects brought by one aspect of the invention are as follows:

after the arrangement of the wire core part, the high-frequency characteristic of the transmission line meets the Association standard of the HDMI2.1 high-frequency requirement after the test, the displayed picture is clearer and more vivid, the color is richer, the audio-visual effect is better, and the picture delay and the pause phenomenon are reduced.

Drawings

Fig. 1 is a schematic cross-sectional view of a core unit disclosed in the present invention;

FIG. 2 is a schematic cross-sectional view of a signal line according to the present disclosure;

fig. 3 is a schematic cross-sectional view of a conventional core unit;

FIG. 4 is a schematic cross-sectional view of a transmission line of embodiment 1 of the present disclosure;

FIG. 5 is a test frame of differential characteristic impedance of embodiment 1 of the present disclosure;

FIG. 6 is a test frame of the transmission time of a signal line according to embodiment 1 of the present disclosure;

FIG. 7 is another test frame of signal line transmission time according to embodiment 1 of the disclosure

FIG. 8 is a test picture of the attenuation of example 1 of the present disclosure;

FIG. 9 is a test frame of the differential-to-common mode in embodiment 1 of the disclosure;

fig. 10 is a schematic cross-sectional view of a transmission line of embodiment 2 of the present disclosure.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments in the present application may be combined with each other; 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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus are not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Embodiment 1, referring to fig. 1 to 4, the present invention provides a high definition data transmission line, including:

a core portion, this core portion includes at least a sinle silk unit 1, and this sinle silk unit 1 includes:

two signal lines 11 distributed in parallel, wherein the signal lines 11 include:

the conductor 111 is formed by stranding 7 tinned copper wires with the diameters of 0.04 +/-0.001 mm; and an insulating layer 112 coated on the conductor 111, wherein the insulating layer 112 is made of an FEP material, and the diameter of the insulating layer 112 is 0.31 ± 0.03 mm.

A shield layer 12 provided outside the two signal lines 11; and the wrapping layer 13 is wrapped on the shielding layer 12.

With reference to fig. 2, one tinned copper wire is located at the center, and the other 6 tinned copper wires are distributed around, so that the signal wires 11 form a true circle structure, the whole is more round and more round, and the flexibility can be improved; if the number of the tinned copper wires is too small or too large, the tinned copper wires are not round, and the flexibility is affected.

If the diameter of the tinned copper wire is too large, the cost is increased, the weight is increased, and the signal wire 11 is made harder. If the size is smaller, the related standard of the association cannot be achieved, and the requirement of high-definition transmission cannot be met.

The insulating layer 112 utilizes FEP material and controls the diameter. The signal line 11 thus formed can meet the association standard for HDMI2.1 high frequency requirements. After the FEP material is extruded, the tinned copper wire can not be broken.

In order to improve the shielding effect, the shielding layer 12 is formed by weaving tinned copper wires with the diameter of 0.03 +/-0.001 mm, and the weaving pitch is 6.7 +/-0.3 mm. If larger dimensions are chosen, the cost is increased, making the shield layer 12 stiffer. The small size is easy to break, and the processing is not easy. The weaving pitch is 6.7 +/-0.3 mm, and the requirement of coverage rate is met.

Referring to fig. 3, in the conventional core unit, a conductor, an insulating layer, a shielding layer, and a tape layer are sequentially disposed from inside to outside. It can be seen that the distance between the conductors in the two wire core units is large, so that the wire core units are easy to have different lengths and slide relatively to generate noise.

Two signal lines 11 in this embodiment are arranged on the inner sides of the shielding layer 12 and the belting layer 13, the distance between the two conductors 111 is small, the processing is convenient, the lengths of the two signal lines 11 can be consistent, and the problem of inconsistent lengths is avoided. The two signal lines 11 are prevented from sliding relative to each other, and noise is prevented from being generated.

Further, the wrapping layer 13 is made of a PTFE material, and the winding pitch of the wrapping layer 13 is 6.0 ± 0.2 mm. In the prior art, materials such as aluminum foil, copper foil and PET are adopted as the belting layer 13, so that the wire core unit 1 is hard, the two signal wires 11 easily slide relative to each other, and noise is generated.

In the embodiment, the PTFE material is used as the wrapping layer 13, so that the flexibility of the wire core unit 1 is less than 80TSU, and the wire core unit is more flexible. The two signal lines 11 will not slide relatively to each other, so as to avoid noise. The winding pitch of the belting layer 13 needs to meet the requirement of overlapping rate, if the pitch is too small, the overlapping rate is high, more bags are needed, and wrinkling is easy; if too large, it is easily impossible to wrap the bag.

In this embodiment, the number of the core units 1 is 7, and the 7 core units 1 are arranged in rows and at intervals; the outside of line core portion still is equipped with first restrictive coating 2, is provided with first filler 4 between this first restrictive coating 2 and the line core portion. The first filler 4 is cotton thread.

The transmission line further comprises two 2000D first polyester fiber ropes 3 which are distributed in parallel, wherein 7 wire core units 1 are located between the two first polyester fiber ropes 3, and any one of the first polyester fiber ropes 3 is parallel to any one of the wire core units 1. In the prior art, the bulletproof wires are mostly utilized, are easy to absorb water and wet and are easy to bulge when being extruded out of the first sheath layer 2. The present embodiment avoids the above problems by using the first polyester fiber rope 3, and at the same time, improves the anti-sway effect. The first polyester fiber rope 3 may be imported from japan, and 2 1000D polyester fiber ropes may be twisted to form a 2000D first polyester fiber rope 3.

The transmission line of the present embodiment has a flat structure. Convenient for passing through a narrow space.

The high-frequency characteristic test can be carried out on the wire core unit, based on the Association standard of HDMI2.1, the high-frequency characteristic test is carried out by using the high-frequency test software of HDMI2.1, and the result is as follows:

1. the test contents are as follows: differential characteristic impedance, in conjunction with fig. 5:

require that	Test results
			100±10Ω	96.82-99.87Ω	Conform to

2. The test contents are as follows: delay difference, combined with fig. 6, 7:

description of the drawings: two signal lines in a core unit are tested to obtain the difference value:

2.7858-2.7836＝0.0022ns＝2.2ps

3. the test contents are as follows: attenuation, in conjunction with fig. 8:

require that	Test results
			-29dB@12GHz	-19.25dB	Conform to

Description of the drawings: the standard was-29 dB when tested at 12 GHz.

4. The test contents are as follows: difference to common mode, in conjunction with fig. 9:

require that	Test results
			-16dB@(0to12GHz)	-23.586dB	Conform to

The transmission line of the embodiment has good high-frequency characteristic, and the transmission displayed picture is high-definition, clear and vivid, and has richer colors and better audio-visual effect.

In conjunction with fig. 10, example 2:

the main differences between this embodiment and embodiment 1 are: the number of the wire core units 1 is 7, the 7 wire core units 1 are parallel to each other, and the other 6 wire core units 1 are positioned around the 1 wire core units 1; the outside of the wire core part is also provided with a second sheath layer 5, and a second filler 7 is arranged between the second sheath layer 5 and the wire core part.

The transmission line also comprises two 2000D second polyester fiber ropes 6 distributed in parallel. The two second polyester fiber ropes 6 are arranged on two sides of the wire core unit 1 in the center position along the width direction of the wire core unit, and any one of the second polyester fiber ropes 6 is parallel to any one of the wire core units 1. The second filler 7 is cotton thread.

The transmission line of the embodiment has good high-frequency characteristics and high transmission picture definition.

The section of the transmission line of the embodiment is circular, so that the transmission line is convenient to bend.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A high definition data transmission line, the transmission line comprising:

two signal lines distributed in parallel, wherein the signal lines include:

the shielding layer is arranged on the outer sides of the two signal wires;

and the belting layer is coated on the shielding layer.

2. The high definition data transmission line of claim 1 wherein the shield layer is braided from tinned copper wire having a diameter of 0.03 ± 0.001mm, with a braid lay of 6.7 ± 0.3 mm.

3. The high definition data transmission line according to claim 1, wherein said wrapping layer is made of PTFE material, and a winding pitch of said wrapping layer is 6.0 ± 0.2 mm.

4. The high-definition data transmission line according to claim 1, wherein the number of the wire core units is 7, and the 7 wire core units are distributed in rows at intervals;

5. The high definition data transmission line of claim 4 further comprising two 2000D first polyester fiber ropes arranged in parallel, wherein 7 core units are located between the two first polyester fiber ropes, and any one of the first polyester fiber ropes is parallel to any one of the core units.

6. The high definition data transmission line of claim 4 wherein the first filler is cotton.

7. The high-definition data transmission line according to claim 1, wherein the number of the core units is 7, the 7 core units are parallel to each other, and the other 6 core units are located around 1 core unit;

8. The high definition data transmission line of claim 7 further comprising two 2000D second polyester fiber cords disposed in parallel. The two second polyester fiber ropes are arranged on two sides of the wire core unit located in the center along the width direction of the wire core unit, and any one of the second polyester fiber ropes is parallel to any one of the wire core units.

9. The high definition data transmission line of claim 7 wherein said second filler is cotton.