High-definition multimedia interface (HDMI) high-definition transmission line with stable transmission

Abstract

The utility model relates to the technical field of connecting cables of high-definition multimedia interfaces, in particular to an HDMI high-definition transmission line capable of stable transmission, which comprises a main cable and plugging assemblies, a plurality of leads are arranged in the main cable, and the leads are electrically connected with conductive terminals in the two plugging assemblies respectively; a plurality of differential channel wires are arranged in the main cable, each differential channel wire is provided with a positive wire, a negative wire and a first grounding wire, the positive wire and the negative wire are mutually crossed and wound to form a twisted cable, the periphery of the twisted cable is wrapped with aluminum foil mylar to form a shielding layer, the first grounding wire is electrically connected with the corresponding aluminum foil mylar, and the second grounding wire is electrically connected with the corresponding aluminum foil mylar to form a shielding layer. Therefore, the shielding effectiveness of the aluminum foil mylar is enhanced. In conclusion, a good shielding assembly is formed in the transmission line, external electromagnetic interference can be reduced, electromagnetic interference generated by line transmission can be eliminated, and therefore the transmission line can stably transmit data signals, especially high-frequency data signals.

Description

Technical Field

[0001] The utility model relates to the technical field of connection cables of high-definition multimedia interfaces, in particular to a HDMI high-definition transmission line with stable transmission. Background Art

[0002] With the rapid development of multimedia technology, people have put forward higher and higher requirements for the quality of multimedia transmission, especially the increasing demand for high-definition multimedia. The multimedia that simply transmits video or audio signals can no longer meet the needs of today's society. HDMI cable is the abbreviation of High Definition Multimedia Interface. It is a digital video / audio interface technology that can transmit uncompressed high-definition video and multi-channel audio data with high quality. At the same time, there is no need to perform digital / analog or analog / digital conversion before signal transmission, which can ensure the highest quality audio and video signal transmission.

[0003] HDMI cable has a large transmission flow rate, and all information is transmitted in the form of digital signals. This ensures that the signal will not be distorted during transmission. Since HDMI cable can integrate audio and video signal transmission, and is small in size, light in weight, and beautiful in appearance, it will gradually replace the existing audio and video signals and VGA cables and be widely used.

[0004] Existing HDMI connection cables are easily affected by electromagnetic interference, which affects the attenuation of signal lines, the delay difference within the differential pair, and the differential impedance. In addition, they have poor compatibility, making it difficult to improve the resolution and resulting in a poor user experience.

[0005] Especially when the data line transmits high-frequency video signals, the impact of external electromagnetic interference will be more obvious.

[0006] There is no problem with HDMI cables with ordinary structures transmitting data signals of normal frequencies. However, when transmitting high-frequency data signals in the 5G era, external electromagnetic interference will enter the HDMI cable and interfere with the high-frequency data signals transmitted therein. Utility Model Content

[0007] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.

[0008] The utility model provides a stable transmission HDMI high-definition transmission line, comprising a main cable with a certain length, and plug-in components respectively fixed to two ends of the main cable, wherein a plurality of conductors are arranged inside the main cable, and are respectively electrically connected to conductive terminals in two plug-in components, so that an electrical path for transmitting electrical signals is formed between the two plug-in components; a plurality of differential channel wires are arranged inside the main cable, and each differential channel wire is respectively provided with a positive conductor, a negative conductor and a first grounding wire, the positive conductor and the negative conductor are cross-wound with each other to form a twisted cable, and an aluminum foil Mylar is wrapped around the outer periphery thereof to form a shielding layer, and the first grounding wire is electrically connected to the corresponding aluminum foil Mylar, thereby enhancing the shielding efficiency of the aluminum foil Mylar.

[0009] A hot-pluggable wire, an extended wire and a second grounding wire are also provided inside the main cable. The hot-pluggable wire and the extended wire are cross-wrapped with each other to form a twisted cable, and an aluminum foil Mylar is wrapped around its periphery to form a shielding layer. The second grounding wire is electrically connected to the corresponding aluminum foil Mylar, thereby enhancing the shielding effectiveness of the aluminum foil Mylar.

[0010] The outer periphery of the multiple conductors of the main cable is also covered with a braided mesh, and the braided mesh is cross-woven with a conductive material.

[0011] The outer periphery of the braided net of the main cable is also covered with an outer mold sheath, and the outer mold sheath is made of PVC material.

[0012] A ring-wrapped copper foil is provided at a position where the wire inside the main cable is connected to the conductive terminal inside the plug-in assembly. The braided mesh at the corresponding position of the ring-wrapped copper foil is folded back a certain length toward the end away from the conductive terminal. The ring-wrapped copper foil is sleeved on the outer periphery of the folded braided mesh, and an electrical connection is formed between the ring-wrapped copper foil and the second grounding wire.

[0013] A metal cover is also provided inside the plug assembly. The metal cover is insulated from the conductive terminal and the wire respectively and is electrically connected to the second grounding wire.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. By cross-winding the positive and negative wires in each differential channel line to form a twisted cable, the transmission characteristics of the wires themselves can be used to eliminate the electromagnetic interference between the wire pairs. At the same time, aluminum foil Mylar is wrapped around its periphery to further enhance its shielding performance.

[0016] 2. The aluminum foil Mylar is electrically connected to the ground wire, so that the aluminum foil Mylar forms a grounding effect, further enhancing its shielding performance.

[0017] 3. A ring-wrapped copper foil is also provided at the portion where the wire is connected to the conductive terminal, and the ring-wrapped copper foil is used to further improve its anti-interference ability. At the same time, a metal cover is provided inside the plug-in assembly, and the metal cover is connected to the grounding wire, so that the plug-in assembly can be connected to the grounding wire of the external device when inserted into the external device, so that the shielding components of this cable are connected to the external grounding wire, further enhancing its shielding performance and ensuring the stable transmission of the transmission line.

[0018] Therefore, after the above-mentioned improvements, the utility model can provide a stable transmission HDMI high-definition transmission line, so that a good shielding component is formed inside it, which can reduce external electromagnetic interference and eliminate the electromagnetic interference generated by the line transmission itself, so that the transmission line can stably transmit data signals, especially stably transmit high-frequency data signals.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the main cable of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the plug-in assembly of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the conductive terminal of the utility model;

[0025] Figure 5 It is a schematic diagram of a wiring diagram of the utility model.

[0026] The reference numerals and names in the figures are as follows:

[0027] 10 main cable; 11 conductor; 12 twisted cable; 13 aluminum foil Mylar; 14 braided mesh; 15 outer mold sheath; 20 differential channel line; 21 positive conductor; 22 negative conductor; 23 first ground wire; 31 hot plug conductor; 32 extension conductor; 33 second ground wire; 41 CEC line; 42 SCL line; 43 SDA line; 44 positive 5 volt line; 45 third ground wire; 50 plug assembly; 51 conductive terminal; 52 ring-wrapped copper foil; 53 metal cover. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figures 1 to 5 In an embodiment of the utility model, a stable transmission HDMI high-definition transmission line includes a main cable 10 with a certain length, and plug-in components 50 respectively fixed to both ends of the main cable 10, wherein a plurality of wires 11 are arranged inside the main cable 10, and are respectively electrically connected to conductive terminals 51 in two plug-in components 50, so that an electrical path for transmitting electrical signals is formed between the two plug-in components 50; a plurality of differential channel wires 20 are arranged inside the main cable 10, and each differential channel wire 20 is respectively provided with a positive wire 21, a negative wire 22 and a first ground wire 23, wherein the positive wire 21 and the negative wire 22 are cross-wound with each other to form a twisted cable 12, and an aluminum foil Mylar 13 is wrapped around the outer periphery thereof to form a shielding layer, and the first ground wire 23 is electrically connected to the corresponding aluminum foil Mylar 13, thereby enhancing the shielding effectiveness of the aluminum foil Mylar 13.

[0030] Specifically, the positive 44 and negative wires 22 in the differential channel line 20 are cross-wound to form a twisted cable 12, and the aluminum foil Mylar 13 is wrapped around the periphery to play a shielding role, thereby reducing external electromagnetic interference and eliminating the electromagnetic interference generated by the line transmission itself. Electromagnetic interference in the process of electrical signal transmission is avoided, and it has good compatibility, reducing the attenuation of the high-frequency characteristics of the cable, the delay difference within the differential pair, and the damage to the differential impedance, thereby stabilizing the quality of the HDMI cable transmission signal.

[0031] Secondly, in order to save production process and production cost, it is preferred to arrange the first grounding wire 23 in parallel with the twisted cable 12 alone, without cross-winding with the positive 44 and negative wires 22. At the same time, the package volume of the aluminum foil Mylar 13 can be reduced, and the grounding wire itself will not generate electromagnetic interference, so it can be arranged alone. At the same time, the first grounding wire 23 is connected to the aluminum foil Mylar 13 at one end or both ends of the main cable 10, so that the aluminum foil Mylar 13 can form a grounding effect, further enhancing its anti-interference ability.

[0032] Again, according to the wiring requirements of HDMI, the differential channel lines 20 are preferably arranged in 4 groups, including three groups of data transmission lines and one group of clock transmission lines, so that the transmission lines can transmit multiple high-speed data at the same time. Moreover, each group of differential channel lines 20 is provided with an independent first grounding wire 23, and is arranged in parallel with the twisted cable 12 of the same group, so that they are uniformly distributed and combined to form the main cable 10. In addition, the main cable 10 can also be provided with a specified CEC line 41, SCL line 42, SDA line 43, positive 5 volt line 44 and a third grounding wire 45. Since the transmission battery interference of these wires 11 themselves is less, there is no need for additional anti-interference processing, but a shielding braided mesh 14 can be set on the periphery of the entire cable. At the same time, an independent third grounding wire 45 can also be provided to connect the third grounding wire 45 with the braided mesh 14 to enhance the anti-interference ability of the braided mesh 14.

[0033] like Figure 2 and Figure 5 As shown, preferably, a hot-swappable wire 31, an extended wire 32 and a second grounding wire 33 are further provided inside the main cable 10. The hot-swappable wire 31 and the extended wire 32 are cross-wound with each other to form a twisted cable 12, and an aluminum foil Mylar 13 is wrapped around its periphery to form a shielding layer. The second grounding wire 33 is electrically connected to the corresponding aluminum foil Mylar 13, thereby enhancing the shielding effectiveness of the aluminum foil Mylar 13.

[0034] Specifically, in order to further enhance the anti-interference ability of the transmission line and improve its stable transmission ability, the hot-swappable wire 31 and the extended wire 32 inside the main cable 10 can be cross-wound to form a shape that can eliminate the electromagnetic interference generated by the line transmission itself. Similarly, an aluminum foil Mylar 13 can be set on its periphery, and a second grounding wire 33 can also be set and connected to the corresponding aluminum film.

[0035] like Figure 2 As shown, preferably, the outer periphery of the multiple wires 11 of the main cable 10 is also covered with a braided mesh 14, and the braided mesh 14 is cross-woven with a conductive material. The outer periphery of the braided mesh 14 of the main cable 10 is also covered with an outer mold sheath 15, and the outer mold sheath 15 is made of PVC material.

[0036] Specifically, in order to further improve the anti-interference ability of the main cable 10, after all the wires 11 are arranged into a main cable, a braided mesh 14 can be set on the outer periphery of the main cable. The braided mesh 14 is preferably woven with thin aluminum wires or thin copper wires to form a mesh structure with electromagnetic shielding effect. This plays a shielding role for the entire main cable 10, making the data transmission of the main cable 10 more stable. In addition, in order to protect the braided mesh 14, an outer mold sheath 15 can be set on the outer periphery of the braided mesh 14, that is, a rubber sheath is set on the outermost periphery of the main cable 10 to protect the main cable 10 and extend its service life.

[0037] like Figure 3 and Figure 4 As shown, preferably, a ring-wrapped copper foil 52 is provided at the portion where the wire 11 inside the main cable 10 is connected to the conductive terminal 51 inside the plug-in assembly 50, and the braided mesh 14 at the corresponding position of the ring-wrapped copper foil 52 is folded back a certain length toward the end away from the conductive terminal 51, and the ring-wrapped copper foil 52 is sleeved on the outer periphery of the folded braided mesh 14, and an electrical connection is formed between the ring-wrapped copper foil 52 and the second grounding wire 33.

[0038] Specifically, at the place where the wire 11 is connected to the conductive terminal 51, since the outer skin of the wire 11 needs to be peeled off, and the internal copper wire is welded to the conductive terminal 51, a gap without a shielding device is likely to appear, and the shielding may fail. Therefore, a ring-wrapped copper foil 52 can be set on the outside of the connected part, and the ring-wrapped copper foil 52 is used to fill the generated gap, so that it has a shielding function and avoids unstable transmission caused by signal interference.

[0039] like Figure 3 As shown, preferably, a metal cover 53 is further provided inside the plug assembly 50 , and the metal cover 53 is insulated from the conductive terminal 51 and the wire 11 respectively, and is electrically connected to the second grounding wire 33 .

[0040] Specifically, inside the plug-in assembly 50, in order to improve its shielding effect, a corresponding metal cover 53 can also be set, and the second grounding wire 33 can be connected to it to form a unified shielding effect, further enhancing the anti-interference ability of the entire transmission cable, so that it can stably transmit the corresponding data signal.

[0041] When in use, the plug-in assembly 50 at one end of the HDMI high-definition transmission line is inserted into a video signal output device, such as a computer host, a TV set-top box, etc.; and the plug-in assembly 50 at the other end is inserted into a video signal input device, such as a computer monitor, a TV, a projector, etc. Thus, the high-definition video signal and the corresponding sound signal can be stably transmitted to the corresponding device for display.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A stable HDMI high-definition transmission line, characterized in that: The invention comprises a main cable (10) having a certain length, and plug-in assemblies (50) respectively fixed to two ends of the main cable (10), wherein a plurality of wires (11) are arranged inside the main cable (10) and are respectively electrically connected to conductive terminals (51) in two plug-in assemblies (50), so that an electrical path for transmitting electrical signals is formed between the two plug-in assemblies (50); a plurality of differential channel wires (20) are arranged inside the main cable (10), and each differential channel wire (20) is respectively provided with a positive wire (21), a negative wire (22) and a first ground wire (23); the positive wire (21) and the negative wire (22) are cross-wound to form a twisted cable (12), and an aluminum foil Mylar (13) is wrapped around the outer periphery thereof to form a shielding layer; the first ground wire (23) is electrically connected to the corresponding aluminum foil Mylar (13), thereby enhancing the shielding effectiveness of the aluminum foil Mylar (13).

2. The HDMI high-definition transmission line with stable transmission according to claim 1, characterized in that: The main cable (10) is further provided with a hot-swappable wire (31), an extended wire (32) and a second ground wire (33) inside. The hot-swappable wire (31) and the extended wire (32) are cross-wrapped with each other to form a twisted cable (12), and an aluminum foil Mylar (13) is wrapped around the outer periphery thereof to form a shielding layer. The second ground wire (33) is electrically connected to the corresponding aluminum foil Mylar (13), thereby enhancing the shielding effectiveness of the aluminum foil Mylar (13).

3. The HDMI high-definition transmission line with stable transmission according to claim 1, characterized in that: The outer circumference of the plurality of conductors (11) of the main cable (10) is also covered with a braided mesh (14), and the braided mesh (14) is made of a conductive material that is cross-woven.

4. The HDMI high-definition transmission line with stable transmission according to claim 3, characterized in that: The outer periphery of the braided mesh (14) of the main cable (10) is also covered with an outer mold sheath (15), and the outer mold sheath (15) is made of PVC material.

5. The HDMI high-definition transmission line with stable transmission according to claim 3, characterized in that: A ring-wrapped copper foil (52) is provided at a portion where the conductor (11) inside the main cable (10) is connected to a conductive terminal (51) inside the plug assembly (50); a braided mesh (14) at a position corresponding to the ring-wrapped copper foil (52) is folded back a certain length toward an end away from the conductive terminal (51); the ring-wrapped copper foil (52) is sleeved on the outer periphery of the folded back braided mesh (14); and an electrical connection is formed between the ring-wrapped copper foil (52) and a second grounding wire (33).

6. The HDMI high-definition transmission line with stable transmission according to claim 1, characterized in that: A metal cover (53) is also provided inside the plug assembly (50); the metal cover (53) is insulated from the conductive terminal (51) and the conductive wire (11), respectively, and is electrically connected to the second grounding wire (33).

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