CN112086240A - A high-definition data transmission line - Google Patents

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

A 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 technique

With the acceleration of digital engineering, high-definition video and audio electronic equipment is becoming more and more popular, the requirements for data transmission lines are getting higher and higher, and people's concept of environmental protection is gradually deepening. Traditional data lines can no longer fully meet the needs of digital imaging technology. High resolution, high transfer rate, high color depth image and digital audio requirements.

In China Patent Application No.: 201820554900.4, an HDMI ultra-high-definition extended data transmission line and a mold for preparing the transmission line are disclosed. The transmission line includes filler, a plurality of signal wire groups, a plurality of electronic wires, a peripheral ground wire, an overall shielding layer including a double-sided double-sided metal foil, a double-layer braided layer and a sheath layer from the inside to the outside. Signal line groups are located on the periphery of the filler, the electronic lines are arranged between two adjacent signal line groups, and the overall shielding layer shields the filler, the plurality of signal lines from the outside group, the plurality of electronic wires and the peripheral ground wire are wrapped together, the double-layer braided layer wraps the overall shielding layer on the outside, and the sheath layer wraps the double-layered braided layer on the outside . The mold is used to prepare the transmission line. The signal line group in this technical solution does not meet the association standard of HDMI2.1 high frequency requirements, and the transmission picture is not high-definition enough, which needs to be further improved.

SUMMARY OF THE INVENTION

In order to solve at least one technical problem existing in the background technology, the present invention proposes a high-definition data transmission line, which meets the association standard of HDMI2.1 high-frequency requirements, and presents clearer and more vivid pictures, richer colors, and better audio-visual effects. , the screen delay and freeze phenomenon are reduced.

A high-definition data transmission line proposed by the present invention, the transmission line includes:

A wire core part, the wire core part includes at least a wire core unit, and the wire core unit includes:

Two parallel distributed signal lines, wherein the signal lines include:

The conductor is formed by twisting seven tinned copper wires with a diameter of 0.04±0.001mm;

an insulating layer, covering the conductor, the insulating layer is made of FEP material, wherein the diameter of the insulating layer is 0.31±0.03mm;

a shielding layer, arranged on the outside of the two signal lines;

A wrapping layer is wrapped on the shielding layer.

Preferably, the shielding layer is formed by braiding of tinned copper wires with a diameter of 0.03±0.001 mm, and the braided 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 a row at intervals;

The outer side of the wire core portion is further provided with a first sheath layer, and a first filler is provided between the first sheath layer and the wire core portion.

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

Preferably, the first filler is cotton thread.

The number of the wire core units is 7, and the 7 wire core units are parallel to each other, wherein the other 6 wire core units are located around one of the wire core units;

The outer side of the wire core portion is further provided with a second sheath layer, and a second filler is provided between the second sheath layer and the wire core portion.

Preferably, the transmission line further includes two second polyester fiber ropes of 2000D distributed in parallel. Two of the second polyester fiber ropes are placed on both sides of the core unit located at the center along its width direction, and any of the second polyester fiber ropes is parallel to any of the core units.

Preferably, the second filler is cotton thread.

The beneficial effects brought by one aspect disclosed by the present invention are:

The configuration of the core part of the present invention, after testing, the high-frequency characteristics of the transmission line meet the HDMI2.1 high-frequency requirements of the association standard, the displayed picture is clearer and more vivid, the color is richer, the audio-visual effect is better, the picture delay, Caton phenomenon is reduced.

Description of drawings

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

2 is a schematic cross-sectional view of the signal line disclosed in the present invention;

3 is a schematic cross-sectional view of an existing wire core unit;

4 is a schematic cross-sectional view of the transmission line according to Embodiment 1 disclosed in the present invention;

FIG. 5 is a test screen of the differential characteristic impedance of Embodiment 1 disclosed in the present invention;

FIG. 6 is a test picture of the transmission time of a signal line according to Embodiment 1 disclosed in the present invention;

FIG. 7 is another test picture of the transmission time of the signal line according to the first embodiment disclosed in the present invention

FIG. 8 is a test screen of the attenuation of Embodiment 1 disclosed in the present invention;

Fig. 9 is the test picture of the differential transfer to the same mode of the embodiment 1 disclosed in the present invention;

FIG. 10 is a schematic cross-sectional view of the transmission line of Embodiment 2 disclosed in the present invention.

Detailed ways

It should be noted that the embodiments of the present application and the features of the embodiments may be combined with each other without conflict; the technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. Clearly and completely described, it is obvious that the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left" and "right" are based on those shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

Embodiment 1, referring to Figures 1-4, a high-definition data transmission line proposed by the present invention, the transmission line includes:

A wire core portion, the wire core portion includes at least a wire core unit 1, and the wire core unit 1 includes:

Two parallel distributed signal lines 11, wherein the signal lines 11 include:

The conductor 111 is formed by twisting seven tinned copper wires with a diameter of 0.04±0.001mm; the insulating layer 112 is covered on the conductor 111, and the insulating layer 112 is made of FEP material, wherein the insulating layer 112 The diameter is 0.31±0.03mm.

The shielding layer 12 is disposed on the outside of the two signal lines 11 ; the wrapping layer 13 is wrapped on the shielding layer 12 .

With reference to Figure 2, let one tinned copper wire be in the center, and the other 6 wires are distributed around, so that the signal wire 11 is formed into a true circle structure, the whole is more round, and the flexibility can be improved; if the number of tinned copper wires exceeds Small or too large, not round, affect the softness.

If the diameter of the tinned copper wire is too large, it will increase the cost, increase the weight, and make the signal wire 11 harder. If you choose a smaller size, it cannot meet the relevant standards of the association and cannot meet the high-definition transmission requirements.

The insulating layer 112 utilizes FEP material and controls the diameter. The signal line 11 thus formed can meet the association standard of HDMI 2.1 high frequency requirements. When extruding FEP material, the tinned copper wire will not break.

In order to improve the shielding effect, the shielding layer 12 is formed by braiding a tinned copper wire with a diameter of 0.03±0.001mm, and the braiding pitch is 6.7±0.3mm. If a larger size is used, the cost will be increased and the shielding layer 12 will be made harder. It is easy to break if you choose a smaller size, and it is not easy to process. Let the braid pitch be 6.7±0.3mm to meet the coverage requirement.

Referring to FIG. 3 , in the existing wire core unit, from the inside to the outside, there are conductors, insulating layers, shielding layers, and tape layers in sequence. It can be seen that the distance between the conductors in the two core units is large, which is prone to different lengths, and is prone to relative sliding, resulting in noise.

In this embodiment, the two signal lines 11 are placed inside the shielding layer 12 and the tape layer 13, the distance between the two conductors 111 is small, and the processing is convenient, and the lengths of the two signal lines 11 can be consistent, avoiding There is a problem of varying lengths. The two signal lines 11 are prevented from sliding relative to each other and noise generation.

Further, the wrapping layer 13 is made of PTFE material, and the winding pitch of the wrapping layer 13 is 6.0±0.2 mm. In the prior art, many materials such as aluminum foil, copper foil, and PET are used as the wrapping layer 13 , which makes the wire core unit 1 relatively rigid, and the two signal wires 11 tend to slide relative to each other, causing noise.

In this embodiment, the PTFE material is used as the wrapping layer 13, so that the flexibility of the wire core unit 1 is less than 80 TSU, which is more flexible. There is no relative sliding between the two signal lines 11 to avoid noise. The winding pitch of the wrapping layer 13 needs to meet the requirement of the overlap ratio. If the pitch is too small, the overlap ratio will be high, and the wrapping will be too much, which is easy to wrinkle;

In this embodiment, the number of the wire core units 1 is 7, and the 7 wire core units 1 are distributed in a row at intervals; A first filler 4 is provided between the sheath layer 2 and the wire core. The first filler 4 is cotton thread.

The transmission line also includes two 2000D first polyester fiber ropes 3 distributed in parallel, wherein seven of the core units 1 are located between the two first polyester fiber ropes 3, and any one of the first polyester fiber ropes 3 The polyester fiber rope 3 is parallel to any one of the core units 1 . In the prior art, most of the bulletproof wires are used, and the bulletproof wires are easy to absorb water and get wet easily, and bulging easily occurs when the first sheath layer 2 is extruded. In this embodiment, the first polyester fiber rope 3 is used to avoid the above problems, and at the same time, the anti-swaying effect is improved. The first polyester fiber rope 3 may be imported from Japan, and two 1000D polyester fiber ropes can be twisted to form the 2000D first polyester fiber rope 3 .

The transmission line in this embodiment has a flat structure. Convenient to pass through tight spaces.

The high-frequency characteristic test of the wire core unit can be carried out. Based on the HDMI2.1 association standard, the high-frequency characteristic test of the HDMI2.1 high-frequency test software is used. The results are as follows:

1. Test content: differential characteristic impedance, combined with Figure 5:

Require Test Results 100±10Ω 96.82-99.87Ω meets the

2. Test content: delay difference, combined with Figures 6 and 7:

Description: Test the two signal lines in one core unit to get the difference:

2.7858-2.7836=0.0022ns=2.2ps

3. Test content: attenuation, combined with Figure 8:

Require Test Results -29dB@12GHz -19.25dB meets the

Note: When testing with 12GHz, the standard is -29dB.

4. Test content: differential transfer to the same mode, combined with Figure 9:

Require Test Results -16dB@(0to12GHz) -23.586dB meets the

The transmission line of this embodiment has good high-frequency characteristics, and the transmission and presentation of the picture is high-definition, clear and vivid, with richer colors and better audio-visual effects.

In conjunction with Figure 10, Embodiment 2:

The main difference between this embodiment and Embodiment 1 is that 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 located in one place. The periphery of the wire core unit 1; the outer side of the wire core portion is further provided with a second sheath layer 5, and a second filler 7 is provided between the second sheath layer 5 and the wire core portion.

The transmission line also includes two second polyester fiber ropes 6 of 2000D distributed in parallel. Two of the second polyester fiber ropes 6 are placed on both sides of the core unit 1 at the center along its width direction, and any of the second polyester fiber ropes 6 and any of the core units 1 parallel. The second filler 7 is cotton thread.

The transmission line of this embodiment has good high-frequency characteristics and high-definition transmission images.

The cross section of the transmission line in this embodiment is circular, which is convenient for bending.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (9)

1. a high-definition data transmission line, is characterized in that, this transmission line comprises: A wire core part, the wire core part includes at least a wire core unit, and the wire core unit includes: Two parallel distributed signal lines, wherein the signal lines include: The conductor is formed by twisting seven tinned copper wires with a diameter of 0.04±0.001mm; an insulating layer, covering the conductor, the insulating layer is made of FEP material, wherein the diameter of the insulating layer is 0.31±0.03mm; a shielding layer, arranged on the outside of the two signal lines; A wrapping layer is wrapped on the shielding layer. 2 . The high-definition data transmission line according to claim 1 , wherein the shielding layer is formed by braiding of tinned copper wires with a diameter of 0.03±0.001 mm, and the braiding pitch is 6.7±0.3 mm. 3 . 3 . The high-definition data transmission line according to claim 1 , wherein the wrapping layer is made of PTFE material, and the winding pitch of the wrapping layer is 6.0±0.2 mm. 4 . 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 a row at intervals; The outer side of the wire core portion is further provided with a first sheath layer, and a first filler is provided between the first sheath layer and the wire core portion. 5 . The high-definition data transmission line according to claim 4 , wherein the transmission line further comprises two 2000D first polyester fiber ropes distributed in parallel, wherein seven of the wire core units are located in two of the first polyester fiber ropes. 6 . Between a polyester fiber rope, any one of the first polyester fiber ropes is parallel to any one of the core units. 6 . The high-definition data transmission line according to claim 4 , wherein the first filler is cotton thread. 7 . 7 . 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 parallel to each other, and the other 6 wire core units are located in 1 around each of the wire core units; The outer side of the wire core portion is further provided with a second sheath layer, and a second filler is provided between the second sheath layer and the wire core portion. 8 . The high-definition data transmission line according to claim 7 , wherein the transmission line further comprises two second polyester fiber ropes of 2000D distributed in parallel. 9 . Two of the second polyester fiber ropes are placed on both sides of the core unit located at the center along its width direction, and any of the second polyester fiber ropes is parallel to any of the core units. 9 . The high-definition data transmission line according to claim 7 , wherein the second filler is cotton thread. 10 .

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