CN219458210U - High definition multimedia interface - Google Patents
High definition multimedia interface Download PDFInfo
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- CN219458210U CN219458210U CN202223579908.1U CN202223579908U CN219458210U CN 219458210 U CN219458210 U CN 219458210U CN 202223579908 U CN202223579908 U CN 202223579908U CN 219458210 U CN219458210 U CN 219458210U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The utility model discloses a high-definition multimedia interface cable with a composite wave-absorbing shielding layer and a high-definition multimedia interface, wherein the high-definition multimedia interface cable comprises: a core having a plurality of transmission signal lines; the first shielding layer, the first wave-absorbing layer, the braiding layer and the protective layer are sequentially wrapped outside the core part, and the first wave-absorbing layer is selected as a wave-absorbing material layer of tungsten disulfide-carbon crystal composite type; the first shielding layer is selected to be a metal foil layer. The high-definition multimedia interface cable is additionally provided with the first wave-absorbing layer between the first shielding layer and the weaving layer, the first wave-absorbing layer and the first shielding layer form a shielding wave-absorbing structure with a sandwich structure, high-frequency noise is effectively shielded and absorbed, and EMC performance of the ultra-high-definition video transmission line is improved. And the first wave-absorbing layer adopts a tungsten disulfide-carbon crystal composite wave-absorbing material layer, so that the first wave-absorbing layer has a good heat dissipation function.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a high-definition multimedia interface cable and a high-definition multimedia interface.
Background
Along with breakthrough of key technical products and industrialization of the ultra-high definition video industry, people have higher and higher requirements on high-definition and low-delay audio and video products. The HDMI (high definition multimedia interface) cable is used as an audio/video transmission medium for transmitting ultra-high definition digital audio and video signals, and particularly for transmitting 8K high definition digital audio and video signals.
The existing HDMI cable adopts a structure that a metal aluminum foil and a copper-zinc plated metal net are wrapped outside the cable to form a shielding structure, and the shielding structure can only be used for shielding common electromagnetic interference (EMI) and electromagnetic anti-interference (EMS), and cannot meet the electromagnetic interference (EMI) and electromagnetic anti-interference (EMS) in the transmission process of 8K high-definition digital audio and video signals. In addition, HDMI cables also have serious disturbances at the interface connection locations, severely affecting the transmission of high-definition digital audio and video signals.
Therefore, when the signal transmission rate is higher and the electromagnetic environment is more complex, the existing metal shielding structure of the HDMI cable cannot meet EMC requirements. In addition, the HDMI cable is in an environment with large external interference, and the anti-interference performance of the simple HDMI cable interface structure cannot meet the requirements, and thus needs to be improved.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present utility model is directed to a high-definition multimedia interface cable and a high-definition multimedia interface.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a high definition multimedia interface cable comprising:
a core having a plurality of transmission signal lines;
the first shielding layer, the first wave-absorbing layer, the woven layer and the protective layer are sequentially wrapped outside the core, wherein the first wave-absorbing layer is selected as a wave-absorbing material layer of tungsten disulfide-carbon crystal composite type.
In an embodiment, the plurality of transmission signal lines include a first ground line, a transmission wire, and a twisted transmission line for transmitting differential signals, and the plurality of groups of twisted transmission lines are distributed in a ring shape and are wrapped by the first shielding layer, and the transmission wire and the first ground line are located in a surrounding area of the twisted transmission line.
In an embodiment, the twisted transmission line includes a twisted pair line set formed by two twisted pair insulated core wires, a second ground wire, a second wave-absorbing layer and a second shielding layer sequentially wrapped outside the twisted pair line set and the second ground wire, wherein the second wave-absorbing layer is selected as a wave-absorbing material layer of tungsten disulfide-carbon crystal composite type.
In an embodiment, the second shielding layer is electrically connected with the first shielding layer.
The second aspect of the utility model discloses a high-definition multimedia interface, comprising the high-definition multimedia interface cable and plug-in components connected to two ends of the high-definition multimedia interface cable, wherein the transmission signal line is electrically connected to the plug-in components.
In an embodiment, the connector assembly includes a housing and a connector fixed to the housing, the housing is made of a metal material, a protection layer of the high-definition multimedia interface cable is removed from an end portion by a preset length and exposes the braid, the connector assembly further includes a double-conductive metal layer wrapped on the braid, the housing is clamped and fixed to the double-conductive metal layer, an electrical connection is established among the braid, the double-conductive metal layer and the housing, and the transmission signal line is connected to the connector.
In an embodiment, the connector assembly further includes a shielding patch wrapped outside the housing, two ends of the shielding patch extend to the double-conductive metal layer and the connector, and the shielding patch, the double-conductive metal layer and the connector are electrically connected.
In an embodiment, the shielding paste comprises a third shielding layer, a first conductive adhesive layer, a third wave-absorbing layer and a second conductive adhesive layer which are sequentially overlapped, the second conductive adhesive layer is attached to the surface of the shell, the third shielding layer, the double-conductive metal layer and the shell are electrically connected, and the first conductive adhesive layer is respectively electrically connected with the double-conductive metal layer, the shell and the connector.
In an embodiment, the length of the third shielding layer is greater than the length of the third absorbing layer.
In an embodiment, the third absorbing layer is selected as a tungsten disulfide-carbon crystal composite absorbing material layer.
In one embodiment, a gold plating layer is disposed on the surface of the conductive portion of the connector.
According to the high-definition multimedia interface cable, the first wave-absorbing layer is additionally arranged between the first shielding layer and the weaving layer, so that the weaving layer, the first wave-absorbing layer and the first shielding layer form a wave-absorbing shielding structure with a sandwich structure, and the first wave-absorbing layer is selected as the wave-absorbing material layer of tungsten disulfide-carbon crystal composite type, thereby effectively shielding and absorbing high-frequency noise and improving EMC performance of an ultra-high-definition video transmission line.
In addition, the high-definition multimedia interface adopts the high-definition multimedia interface cable to carry out data transmission, so that the high-definition multimedia interface has good EMC performance and the stability of ultra-high-definition digital audio and video signals is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present utility model, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following descriptions are only some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic cross-sectional view of a high definition multimedia interface cable of the present utility model;
FIG. 2 is a schematic diagram of a high definition multimedia interface cable connected to a connector assembly according to the present utility model;
fig. 3 is a schematic cross-sectional view of a shielding patch of the present utility model.
In the figure: 1. a core; 2. a first shielding layer; 3. a first wave-absorbing layer; 4. a braiding layer; 5. a protective layer; 10. twisting the transmission line; 11. a second shielding layer; 12. a second wave-absorbing layer; 13. an insulating core wire; 14. a second ground line; 20. a transmission wire; 30. a first ground line; 41. a double-conductive metal layer; 42. shielding paste; 43. a housing; 44. a connector; 421. a third shielding layer; 422. a first conductive adhesive layer; 423. a third wave-absorbing layer; 424. and a second conductive adhesive layer.
Detailed Description
The present utility model will be described in more detail below in order to facilitate understanding of the present utility model. It should be understood, however, that the utility model may be embodied in many different forms and is not limited to the implementations or embodiments described herein. Rather, these embodiments or examples are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments or examples only and is not intended to be limiting of the utility model.
See fig. 1: the utility model discloses a high-definition multimedia interface cable with a composite wave-absorbing shielding layer, which can be used as a cable part of an 8K ultra-high definition HDMI transmission cable.
The high-definition multimedia interface cable comprises a core part 1, a first shielding layer 2, a first wave-absorbing layer 3, a braiding layer 4 and a protective layer 5 which are sequentially wrapped outside the core part 1, wherein the core part 1 is provided with a plurality of strands of transmission signal wires. The core 1 transmits high definition signals through a plurality of transmission signal lines. The first shielding layer 2, the first wave-absorbing layer 3, the braiding layer 4 and the protective layer 5 are sequentially wrapped outside the core 1 to form shielding and anti-interference effects.
The first wave-absorbing layer 3 is selected as a wave-absorbing material layer of tungsten disulfide-carbon crystal composite type. The wave absorbing material layer of the tungsten disulfide-carbon crystal composite type is made of a composite material composed of tungsten disulfide and carbon crystals and an adhesive such as soft polyurethane. Among them, it is preferable to compound tungsten disulfide in a sheet form with a carbon crystal having a three-dimensional prismatic shape and a porous structure, so that the wave absorbing performance can be further improved. In addition, in order to improve the heat dissipation function of the tungsten disulfide-carbon crystal composite type wave absorbing material layer, the tungsten disulfide-carbon crystal composite type wave absorbing material layer can be further compounded with heat conducting materials such as carbon nanotubes, graphite, boron nitride and the like, and carbon nanotubes are preferred, and the carbon nanotubes are used as one-dimensional macroscopic assembly materials and are uniformly arranged in the horizontal direction, so that the wave absorbing performance can be further improved in cooperation with the composite material formed by tungsten disulfide and carbon crystals. Preferably, the thickness of the first wave-absorbing layer 3 is set to b 1 Wherein b is 0.3mm or less 1 Less than or equal to 0.6mm, and can be specifically set to be 0.3mm, 0.4mm, 0.5mm, 0.6mm and the like so as to wrap the transmission signal line.
The first shielding layer 2 is selected to be a metal foil layer. Preferably, the metal foil layer is an aluminum foil, and the metal foil layer is wrapped outside the core 1 to constitute a shielding layer. Preferably, the thickness of the metal foil layer is set to b 2 Wherein b is less than or equal to 10 mu m 2 And 30 μm or less, specifically 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, etc. can be set.
The braiding layer 4 is a metal wire braiding structure wrapped outside the first wave absorbing layer 3, so that flexibility and bending and torsion strength of the high-definition multimedia interface cable are improved. Preferably, the braiding layer 4 is braided by adopting aluminum magnesium alloy wires, and the wire diameter D is 0.1mm less than or equal to D less than or equal to 0.2mm, alternatively, the wire diameter D can be set to be 0.1mm, 0.12mm, 0.15mm, 0.18mm and 0.2mm. The aluminum magnesium alloy wire is formed by a braiding process, wherein the braiding density a of the braiding layer 4 is more than or equal to 80% and less than or equal to 90%, and optionally, the braiding density a of the braiding layer is set to 80%, 85%, 88% and 90%. In an alternative embodiment, the material of the braid 4 is aluminum magnesium alloy, the diameter of a single wire is 0.12mm, and the braiding density is 85%.
The protective layer 5 is wrapped outside the braid 4 to protect the braid 4. Alternatively, the protective layer 5 is selected to be a layer of polyvinyl chloride material.
The high-definition multimedia interface cable is additionally provided with the first wave-absorbing layer 3 between the first shielding layer 2 and the weaving layer 4, the first wave-absorbing layer 3 and the first shielding layer 2 form a shielding wave-absorbing structure with a sandwich structure, high-frequency noise is effectively shielded and absorbed, and EMC performance of the ultra-high-definition video transmission line is improved. And the first wave-absorbing layer 3 adopts a tungsten disulfide-carbon crystal composite wave-absorbing material layer, has a good heat dissipation function, and greatly stabilizes the working environment of the high-definition multimedia interface cable.
The core 1 is formed of a plurality of transmission signal lines to transmit different signals. The multi-strand transmission signal lines are arranged according to a set rule so as to reduce or avoid mutual interference among the transmission signal lines.
In one embodiment, the multi-strand transmission signal line includes a transmission wire 20, a first ground wire 30, and a twisted transmission line 10 for transmitting differential signals, wherein the plurality of groups of twisted transmission lines 10 are distributed in a ring shape and are wrapped by the first shielding layer 2, and the transmission wire 20 and the first ground wire 30 are located in a surrounding area of the twisted transmission line 10.
The transmission wires 20 are provided with at least two, and the transmission wires 20 are of a wire structure and comprise a core at the center and a plastic sheath wrapping the core. For ease of identification, the plastic sheath has a distinguishing color, e.g., the color of the plastic sheath is black, yellow, white, and purple, respectively. Preferably, the wire core is made of copper wire.
In an alternative embodiment, the transmission wires 20 are arranged in four, the four transmission wires 20 are distributed in a ring shape, the first ground wire 30 is located at a center position surrounded by the four transmission wires 20, and the twisted transmission wires 10 are located at the outer periphery of the transmission wires 20. In the present embodiment, the high-definition multimedia interface cable is applied to the high-definition multimedia interface, and the first ground line 30 is mainly used for the reference ground and shielding effect of the transmission line. Alternatively, the first ground wire 30 is made of metallic copper.
A plurality of sets of twisted transmission lines 10 are looped around to surround the transmission lines in the loop area. The first shielding layer 2 is wrapped outside the ring formed by the stranded transmission line 10, so that the wrapping compactness is improved. Preferably, five or more sets of twisted transmission lines 10 are provided. For example, the twisted transmission lines 10 are provided with five sets, and the five sets of twisted transmission lines 10 are located on the same circle. The twisted transmission lines 10 are provided in five groups and are uniformly distributed to constitute a balanced structure.
The shielding layer of the stranded transmission line 10 adopts the structure of an aluminum foil-wave absorbing layer, meanwhile, the stranded transmission line 10 is uniformly distributed around the first shielding layer 2, and the shielding layer aluminum foil of the stranded transmission line 10 is fully overlapped with the aluminum foil of the first shielding layer 2, so that the electromagnetic compatibility and the heat dissipation function of the cable are further improved.
The twisted transmission line 10 includes a twisted wire set formed by two twisted insulated core wires 13, a second ground wire 14, and a second wave-absorbing layer 12 and a second shielding layer 11 sequentially wrapped outside the twisted wire set and the second ground wire 14, where the second wave-absorbing layer 12 is selected as a tungsten disulfide-carbon crystal composite wave-absorbing material layer. Preferably, the material of the second absorbing layer 12 is substantially the same as that of the first absorbing layer 3, and it will be understood that the description is omitted herein. Preferably, the thickness of the second wave-absorbing layer 12 is set to b 3 Wherein b is 0.3mm or less 3 Less than or equal to 0.6mm, specifically, 0.3mm, 0.4mm, 0.5mm, 0.6mm, etc. can be set to wrap the second shielding layer 11.
The two insulating core wires 13 are twisted to form a twisted wire group, and the second ground wire 14 is arranged in parallel with the twisted wire group and is simultaneously wrapped by the second wave absorbing layer 12. Wherein, the insulating core wire 13 comprises a metal core and an insulating sleeve sleeved outside the metal core, and the metal core is made of copper metal material optionally.
The second shielding layer 11 wraps the twisted wire group and the second ground wire 14 to constitute a shielding function. The second wave-absorbing layer 12 is wrapped around the second shielding layer 11, and the second shielding layers 11 of the adjacent stranded transmission lines 10 are uniformly distributed around the inner wall of the first shielding layer 2 and are mutually clung.
Further, the second shielding layer 11 is electrically connected to the first shielding layer 2. Preferably, the second shielding layer 11 is chosen to be an aluminum foil, the aluminum foil between the second shielding layer 11 and the first shielding layer 2 being electricalConducting to form shielding effect. Preferably, the thickness of the second shielding layer 11 is set to b 4 Wherein b is less than or equal to 10 mu m 4 And 30 μm or less, specifically 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, etc. can be set.
See fig. 2 and 3: the high-definition multimedia interface cable disclosed in the embodiment is applied to a high-definition multimedia interface, so that the high-definition multimedia interface has good EMC performance.
In one embodiment, the high-definition multimedia interface comprises the high-definition multimedia interface cable disclosed in the above embodiment and a connector assembly connected to two ends of the high-definition multimedia interface cable, and the transmission signal line is electrically connected to the connector assembly. The connector assembly is used for connecting the signal source and the display respectively so as to transmit the ultra-high definition digital audio and video signals of the signal source to the display through the high definition multimedia interface. The high-definition multimedia interface cable is provided with the shielding wave-absorbing structure of the sandwich structure, so that the stability of ultra-high-definition digital audio and video signals is greatly improved, and the conveying effect is good.
Further, the connector assembly includes a housing 43 and a connector 44 fixed to the housing 43, and the housing 43 is made of a metal material. The housing 43 holds the mounting insert 44, and preferably the housing 43 is made of an electroplated tin sheet, which is a cold rolled low carbon sheet or strip coated on both sides with commercially pure tin.
The protective layer 5 of the high-definition multimedia interface cable is removed from the end portion by a predetermined length and the braid 4 is exposed, specifically, the high-definition multimedia interface cable is positioned at the end portion protective layer 5 and a part is cut out in a ring shape to expose the braid 4. The cut-out length of the protective layer 5 is adapted based on the design requirements of the connected connector assembly.
The connector assembly further comprises a double-conductive metal layer 41 wrapped on the braid 4, the outer shell 43 is clamped and fixed on the double-conductive metal layer 41, electric connection is constructed among the braid 4, the double-conductive metal layer 41 and the outer shell 43, and the transmission signal line is connected with the connector 44. The double-conductive metal layer 41 has a conductive effect, and preferably, the double-conductive metal layer 41 is a double-conductive copper foil, and the material thereof is copper. Alternatively, the thickness of the bimetal layer 41 is 0.05mm to 0.2mm, and the thickness of the bimetal layer 41 is preferably 0.1mm.
The double-conductive metal layer 41 has good conductive property, the double-conductive metal layer 41 is used for wrapping the metal woven mesh through 360 degrees in an annular mode, electric connection is established among the double-conductive metal layer 41, the woven layer 4 and the component shell 43, and the shielding of the connection part of the high-definition multimedia interface cable and the shell 43 is achieved.
In one embodiment, the connector assembly further includes a shielding patch 42 wrapped outside the housing 43, and two ends of the shielding patch 42 extend to the bimetal layer 41 and the connector 44, and the shielding patch 42, the bimetal layer 41 and the connector 44 are electrically connected. The shielding patch 42 is a thin-wall wrapping piece with shielding and wave absorbing functions, and wraps the outer portion of the shell 43, and the shielding patch 42, the double-guide metal layer 41 and the connector 44 form a 360-degree annular wrapping, so that the connection position of the high-definition multimedia interface cable and the shell 43 and the connection position of the shell 43 and the connector 44 are shielded and free of leakage.
In an alternative embodiment, the shielding patch 42 includes a third shielding layer 421, a first conductive adhesive layer 422, a third wave-absorbing layer 423, and a second conductive adhesive layer 424 that are sequentially stacked, and the second conductive adhesive layer 424 is adhered to the surface of the housing 43. The third shielding layer 421 is a metal foil layer made of a metal material, preferably, the third shielding layer 421 is made of copper, and the thickness of the third shielding layer 421 can be in the range of 0.05mm to 0.2mm, and the thickness of the double-conductive metal layer 41 is preferably 0.1mm. The third shielding layer 421, the double-conductive metal layer 41 and the housing 43 are electrically connected to form a 360-degree annular package, so that the high-definition multimedia interface cable, the housing 43, the connector 44 and other connection parts are shielded and have no leakage, and the shielding leakage of the gap of the housing 43 is preferably prevented.
The first conductive adhesive layer 422 and the second conductive adhesive layer 424 are composed of resin and conductive metal particles, and the first conductive adhesive layer 422 is overlapped with the double conductive metal layer 41 and the connector 44, so that the first conductive adhesive layer 422 is electrically connected with the double conductive metal layer 41, the housing 43 and the connector 44 respectively. Preferably, the length of the first conductive adhesive layer 422 is equal to the length of the third shielding layer 421, and the length of the third shielding layer 421 is greater than the length of the third wave absorbing layer 423. The third shielding layer 421 and the excess portion of the first conductive adhesive layer 422 may overlap the conductive metal layer 41 and the connector 44 after bending, so as to form an electrical conduction. Preferably, the length of the third shielding layer 421 beyond the edge of the third wave-absorbing layer 423 is set to L, wherein L is 2 mm.ltoreq.L.ltoreq.8 mm. Preferably, the length of the third shielding layer 421 beyond the edge of the third absorbing layer 423 is 4mm.
The third wave-absorbing layer 423 is located within the wrapping range of the third shielding layer 421 and is attached to the housing 43 through the second conductive adhesive layer 424 to form an electrical connection. Preferably, the third absorbing layer 423 is selected to be a tungsten disulfide-carbon crystal composite absorbing material layer. Specifically, the third wave-absorbing layer 423 is a composite wave-absorbing material shielding layer made of carbon nanotubes, WS 2/three-dimensional prismatic porous carbon crystal composite material, and soft polyurethane. Preferably, the thickness of the third absorbing layer 423 is set to b 5 Wherein b is 0.3mm or less 5 Less than or equal to 0.6mm. Wherein the thickness of the third wave-absorbing layer 423 is set to 0.3mm, 0.4mm, 0.5mm, 0.6mm, etc. to wrap the outer case 43.
The connector 44 is used for plugging the HDMI interface of the device, wherein the plugging impedance of the connector 44 and the HDMI interface also affects the shielding effectiveness level of the cable as a whole. The connector 44 is shaped to accommodate the conventional HDMI interface configuration and dimensions, and on this basis, the surface of the conductive portion of the connector 44 is provided with a gold plating. The gold plating process is adopted to realize low-impedance connection of the connector 44 and the HDMI interface, and meanwhile, the lap joint strength and the wear resistance between the connector 44 and the housing 43 are enhanced, the contact impedance between the connector 44 and the housing 43 is reduced, and low-impedance connection is realized.
The interface of the connector assembly is lapped with the weaving layer 4 through the double-conductive metal layer 41 to establish electrical connection, and the double-conductive copper foil is crimped and fixed through the shell 43. The shell 43 is simultaneously crimped on the connector 44, and then is wrapped by the shielding patch 42 with the third wave absorbing layer 423, so that the lap joint conduction between the high-definition multimedia interface cable and the connector 44 is realized, the shielding performance is higher, and the immunity to the external environment is also stronger.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (8)
1. The high-definition multimedia interface is characterized by comprising a high-definition multimedia interface cable and plug-in components connected to two ends of the high-definition multimedia interface cable;
the high-definition multimedia interface cable comprises a core part, a first shielding layer, a first wave absorbing layer, a braiding layer and a protective layer, wherein the first shielding layer, the first wave absorbing layer, the braiding layer and the protective layer are sequentially wrapped outside the core part, and the core part is provided with a plurality of strands of transmission signal wires;
the connector assembly comprises a shell and a connector fixed on the shell, the shell is made of metal materials, a protection layer of the high-definition multimedia interface cable is formed by removing a preset length from the end portion and exposing the weaving layer, the connector assembly further comprises a double-conductive metal layer wrapping the weaving layer, the shell is clamped and fixed on the double-conductive metal layer, electric connection is established among the weaving layer, the double-conductive metal layer and the shell, and the transmission signal line is connected to the connector.
2. The high definition multimedia interface of claim 1, wherein the connector assembly further comprises a shielding patch wrapped around the exterior of the housing, wherein two ends of the shielding patch extend to the bi-conductive metal layer and the connector, and wherein the shielding patch, the bi-conductive metal layer and the connector are electrically connected.
3. The high-definition multimedia interface of claim 2, wherein the shielding paste comprises a third shielding layer, a first conductive adhesive layer, a third wave-absorbing layer and a second conductive adhesive layer which are sequentially overlapped, the second conductive adhesive layer is attached to the surface of the housing, the third shielding layer, the double-conductive metal layer and the housing are electrically connected, and the first conductive adhesive layer is electrically connected with the double-conductive metal layer, the housing and the connector respectively.
4. A high definition multimedia interface as claimed in claim 3 wherein the length of the third shielding layer is greater than the length of the third absorbing layer.
5. The high-definition multimedia interface as claimed in claim 4, wherein the surface of the conductive portion of the connector is provided with a gold plating.
6. The high definition multimedia interface of claim 1, wherein the plurality of transmission signal lines includes a first ground line, a transmission line, and a twisted transmission line for transmitting differential signals, and wherein the plurality of groups of the twisted transmission lines are annularly distributed and are surrounded by the first shielding layer, and wherein the transmission line and the first ground line are located in a surrounding area of the twisted transmission line.
7. The high-definition multimedia interface as claimed in claim 6, wherein the twisted transmission line comprises a twisted pair line group formed by two insulated core wires twisted in pairs, a second ground wire, a second wave absorbing layer and a second shielding layer sequentially wrapped outside the twisted pair line group and the second ground wire.
8. The high definition multimedia interface of claim 7, wherein the second shielding layer is in electrical communication with the first shielding layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223579908.1U CN219458210U (en) | 2022-12-30 | 2022-12-30 | High definition multimedia interface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223579908.1U CN219458210U (en) | 2022-12-30 | 2022-12-30 | High definition multimedia interface |
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| CN219458210U true CN219458210U (en) | 2023-08-01 |
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| CN202223579908.1U Active CN219458210U (en) | 2022-12-30 | 2022-12-30 | High definition multimedia interface |
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