Vehicle-mounted high-speed LVDS connecting line

Abstract

The invention relates to the technical field of automobile connecting wires, in particular to a vehicle-mounted high-speed LVDS connecting wire which comprises an LVDS connecting wire body and a connector, the connector comprises a power connection assembly and a metal shell, one end of the LVDS connecting wire body is connected with the power connection assembly, the metal shell comprises an iron shell upper cover and an iron shell lower cover, the iron shell upper cover integrally wraps the power connection assembly, and the metal shell lower cover integrally wraps the power connection assembly. The iron shell upper cover and the iron shell lower cover are clamped and fixed; a plurality of PINs and a plurality of PIN plugging grooves are arranged in the power connection assembly, the plurality of PIN plugging grooves are arranged in two rows, and the plurality of PINs are arranged in the plurality of PIN plugging grooves; the LVDS connecting line comprises two groups of high-speed signal pairs, each group of high-speed signal pairs is internally provided with two wires and a ground wire, and the two wires and the ground wire are coated with aluminum foil mylar; a plurality of flame-retardant fillers are arranged around the two groups of high-speed signal pairs; and the two groups of high-speed signal pairs and the plurality of flame-retardant fillers are coated with a protective layer, and the protective layer is coated with an aluminum foil mylar layer, so that the shielding performance of the product and the stability of data transmission are improved.

Description

Technical Field

[0001] This invention relates to the field of automotive wiring harness technology, and more particularly to a high-speed LVDS wiring harness for vehicles. Background Technology

[0002] In the fields of automotive electronics and high-speed data transmission, high-speed LVDS cables are mainly used to enable high-speed data transmission between various electronic devices in a vehicle, such as navigation systems, electronic rearview mirrors, parking assistance systems, ADAS sensors, and the vehicle's main control system.

[0003] High-speed automotive cables must meet the growing demand for high-speed data transmission within vehicles while ensuring reliable signal transmission in complex electromagnetic environments. Traditional manufacturing processes often result in signal transmission anomalies during high-speed automotive data transmission. 1. Misalignment of the twist pitch and center distance of the core wires in the LVDS high-speed signal line can cause screen distortion, flickering, or black screen due to data packet loss. 2. Loose aluminum foil on the LVDS high-speed line caused a sudden signal interruption; 3. Substandard solder joints on the LVDS high-speed signal lines can cause signal delays, image distortion, and ghosting on the screen. 4. The product has poor shielding effect and unstable EMC performance.

[0004] The above issues are closely related to the design of the manufacturing process for high-speed vehicle connection cables. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention aims to provide a high-speed LVDS connector for vehicles. By enlarging the main metal shell, the area covered by the connector is increased, improving the product's shielding performance. The product's manufacturing process involves pre-tinning the connector, pre-positioning the color sequence, and double-sided integrated welding, reducing the heating time of the connector and wire. Consistent processing power ensures consistent solder joints on the connector, preventing signal transmission delays, image distortion, and screen ghosting.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A vehicle-mounted high-speed LVDS connector includes an LVDS connector and a connector. The connector includes a power receiving component and a metal housing. One end of the LVDS connector is connected to the power receiving component. The metal housing includes an upper metal cover and a lower metal cover. The upper metal cover completely covers the power receiving component, and the upper and lower metal covers are snap-fitted together. The power receiving component has multiple pins and multiple pin insertion slots. The multiple pin insertion slots are arranged in a double row, and the multiple pins are located in the multiple pin insertion slots. The LVDS connector includes two sets of high-speed signal pairs. Each set of high-speed signal pairs contains two conductors and one ground wire. The two conductors and one ground wire are covered with aluminum foil Mylar. Several flame-retardant fillers are arranged around the two sets of high-speed signal pairs. The two sets of high-speed signal pairs and the flame-retardant fillers are covered with a protective layer. The protective layer is covered with an aluminum foil Mylar layer. The aluminum foil Mylar layer is covered with a braided layer. The braided layer is covered with a sheath.

[0007] Preferably, the upper iron shell cover has multiple slots on both sides, and anti-misalignment stops are provided in the slots; the lower iron shell cover has multiple buckles on both sides, and the multiple buckles are engaged and fixed with the multiple slots; the front end of the upper iron shell cover is entirely covered with the electrical connection component, the rear end of the upper iron shell cover has a riveting area, and the rear end of the lower iron shell cover has a riveting area, and the riveting areas of the upper and lower iron shell covers fix the LVDS connection wire by riveting.

[0008] Preferably, the conductors and ground wires are of different colors depending on the usage requirements.

[0009] Preferably, the protective layer is made of PET material.

[0010] Preferably, the aluminum foil Mylar layer is formed by bonding aluminum foil and polyester film together.

[0011] Preferably, the sheath is made of PVC material.

[0012] A method for preparing the above-mentioned LVDS connector includes the following steps: preparing the LVDS connector, removing the insulation from the core wire of the connector portion, turning the braided layer inside out, covering the core wire with copper foil, and then connecting it to the power connection component; when the LVDS connector is connected to the power connection component in the connector, the high-speed signal alignment conductor and the ground wire are pre-positioned according to color sequence and then low-voltage injection molded and fixed at the end away from the PIN pin in the PIN pin insertion slot; the PIN pins are pre-tinned, and multiple PIN pins are pre-tinned and inserted into the double-row PIN pin insertion slots. After the high-speed signal alignment conductor and the ground wire are positioned, they are fixed to the PIN pins by double-sided integrated HUB welding through pre-tinning welding, and the overall double-sided welding is completed in one go.

[0013] Preferably, the LVDS connection cable used to connect the power connection component has a stripping size of no more than 10mm, and the aluminum foil Mylar on the high-speed signal centering conductor and ground wire inside the LVDS connection cable is retained to be no less than 7mm.

[0014] Preferably, the high-speed signal pair center wire is stripped by 1.5mm-2mm, and the gap between the connector and the high-speed signal pair Mylar is 1mm-1.5mm.

[0015] This invention has at least the following beneficial effects: 1. The reserved length of the shielding aluminum foil in the product ensures that the twist pitch of the core wire and the center distance between the core wire sheath and the copper wire are not affected by the pre-processing of the high-speed signal of the wire. The twist pitch and center distance do not change, ensuring that there will be no black screen phenomenon such as screen distortion, screen flickering, or data packet loss.

[0016] 2. The connector pins are pre-tinned. High-speed signal alignment wires and ground wires are pre-positioned using color coding and then fixed by low-pressure injection molding. The entire product is double-sided integrated soldering, reducing the heating time of the connector and wires. The short heating time for the copper wire soldering ensures no center-to-center displacement of the copper wires. Consistent processing power ensures consistent solder joints on the connector, preventing signal transmission delays, image distortion, and screen ghosting.

[0017] 3. The metal shell of the product's connector has been enlarged, increasing the coverage area and improving the product's shielding performance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is an exploded view of the structure according to an embodiment of the present invention; Figure 3 This is a schematic cross-sectional view of the LVDS connection line according to an embodiment of the present invention.

[0020] In the diagram: 1. Connecting wire; 2. Power connection assembly; 3. Upper metal casing cover; 4. Lower metal casing cover; 11. Signal pair A; 12. Signal pair B; 13. Ground wire; 14. Filler; 15. Protective layer; 16. Braided layer; 17. Aluminum foil Mylar layer; 18. Sheath; 21. Pin; 31. Slot; 32. Riveting area of ​​upper metal casing cover; 41. Buckle; 42. Riveting area of ​​lower metal casing cover. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Example

[0022] Reference Figures 1-3 A vehicle-mounted high-speed LVDS connector includes an LVDS connector 1 and a connector. The connector includes a power connection component 2 and a metal housing. One end of the LVDS connector 1 is connected to the power connection component 2. The metal housing includes an upper iron cover 3 and a lower iron cover 4. The upper iron cover 3 completely covers the power connection component 2, and the upper iron cover 3 and the lower iron cover 4 are snapped together and fixed. The power connection component 2 has a plurality of pins 21 and a plurality of pin insertion slots. The plurality of pin insertion slots are arranged in a double row, and the plurality of pins 21 are disposed in the plurality of pin insertion slots. The LVDS connector includes two sets of high-speed signal pairs. Each set of high-speed signal pairs contains two conductors and one ground wire 13. The two conductors and the ground wire 13 are covered with aluminum foil Mylar. Several flame-retardant fillers 14 surround the two sets of high-speed signal pairs. A protective layer 15 covers the two sets of high-speed signal pairs and the flame-retardant fillers 14. An aluminum foil Mylar layer 17 is covered outside the protective layer 15. A braided layer 16 is covered outside the aluminum foil Mylar layer 17. A sheath 18 is covered outside the braided layer. Figure 3 As shown, signal pairs A11 and B12 have conductors A1 and A2, and B1 and B2, respectively. LVDS uses a pair of complementary signal lines (positive and negative signals) to transmit data and ground. This differential signal design can improve the data transmission rate, stabilize the data with characteristic impedance, reduce return loss, and the ground line can effectively reduce the interference of signal transmission, thus improving the stability and reliability of transmission.

[0023] The upper metal cover 3 has multiple slots 31 on both sides, and each slot 31 has an anti-misalignment stop. The lower metal cover 4 has multiple buckles 41 on both sides, which engage with the slots 31 for fixation. The front end of the upper metal cover 3 completely covers the power connection component 2, and the rear end of the upper metal cover 3 has a riveting area 32. The rear end of the lower metal cover 4 also has a riveting area 42. The riveting areas 32 and 42 fix the LVDS connection cable together by riveting. Through the engagement of the upper and lower metal covers 3 and 4, the entire metal casing covers the power connection component, forming a complete shielding structure, effectively improving the product's EMC resistance to electromagnetic interference.

[0024] The wires and ground wires are colored according to usage requirements. By setting different colors, the wires and ground wires can be quickly positioned and fixed to the power connection components.

[0025] The protective layer 15 is made of PET material. PET polyethylene terephthalate has the characteristics of being lightweight, flexible, wear-resistant, high temperature resistant and UV resistant, and can adapt to complex environmental pressures. At the same time, it has good insulation performance and expandability.

[0026] The aluminum foil Mylar layer 17 is made of aluminum foil and polyester film bonded together. The aluminum foil Mylar layer is a cable shielding layer material, which can stabilize the internal strand structure of the wire, shield electromagnetic interference, and isolate high temperature and moisture.

[0027] The sheath 18 is made of PVC material, which has the functions of insulation, oil resistance, cold resistance, high temperature resistance and flame retardancy.

[0028] A method for preparing the aforementioned LVDS connector includes the following steps: preparing the LVDS connector 1, removing the insulation from the core wire of the connector portion, turning over the braided layer 16, covering the core wire with copper foil, and then connecting it to the power connection component 2; when the LVDS connector 1 is connected to the power connection component 2 in the connector, the high-speed signal alignment conductor and ground wire are pre-positioned by color sequence and then low-voltage injection molded and fixed at the end away from the PIN pin insertion slot in the PIN pin insertion slot; the PIN pins 21 are pre-tinned, and multiple PIN pins 21 are pre-tinned and inserted into the double-row PIN pin insertion slot. After the high-speed signal alignment conductor and ground wire are positioned, they are fixed to the PIN pins by double-sided integrated HUB welding using the pre-tinning welding method, and the overall double-sided welding is completed in one go. The product processing method uses pre-tinning for the connector, pre-positioning of the product by color sequence, and the overall double-sided integrated welding of the product reduces the heating time of the connector and the wire, and the heating time of the copper wire welding is short, ensuring that the center distance of the copper wire in the wire does not shift. Consistent processing power ensures consistent solder joints on the connectors, preventing signal transmission delays, image distortion, and screen ghosting.

[0029] The LVDS connecting cable 1 used to connect to the power connection component 2 has a stripping size not exceeding 10mm. The aluminum foil Mylar on the high-speed signal center conductor and ground wire inside the LVDS connecting cable 1 is retained to a minimum of 7mm. This retained length of the shielding aluminum foil ensures that the twist pitch of the signal core wires and the center distance between the core wire sheath and the copper wire are unaffected by pre-processing, preventing any changes in the twist pitch and center distance. This ensures that there will be no screen flickering, data packet loss, or black screen issues.

[0030] The high-speed signal pair conductor is stripped of 1.5mm-2mm, and the gap between the connector and the high-speed signal pair Mylar is 1mm-1.5mm to maintain the stability of the overall wire structure.

[0031] Product assembly instructions: 1. The stripping size of the LVDS wire connector should not exceed 10mm. After turning the braided layer inside out, the core wire should be wrapped with copper foil. 2. Clean out the aluminum foil structure covering the main body of the wire; 3. At least 7 mm of Mylar wire should be retained on the internal core wire, and the excess should be removed by laser cutting; 4. Remove 1.5-2mm of insulation from the core wire; the gap between the connector and the Mylar wire should be 1-1.5mm. 5. The connector pins are pre-tinned, the product color sequence is pre-positioned, and the entire double-sided soldering is completed in one go; 6. The upper cover of the iron shell can directly cover the entire LVDS connector before assembling the lower cover of the iron shell.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle-mounted high-speed LVDS connection cable, characterized in that: The device includes an LVDS connector and a connector. The connector includes a power receiving component and a metal housing. One end of the LVDS connector is connected to the power receiving component. The metal housing includes an upper metal cover and a lower metal cover. The upper metal cover completely covers the power receiving component, and the upper metal cover and the lower metal cover are snap-fitted together. The power receiving component has multiple pins and multiple pin insertion slots. The multiple pin insertion slots are arranged in a double row, and the multiple pins are located in the multiple pin insertion slots. The LVDS connector includes two sets of high-speed signal pairs. Each set of high-speed signal pairs contains two conductors and one ground wire. The two conductors and one ground wire are covered with aluminum foil Mylar. Several flame-retardant fillers are arranged around the two sets of high-speed signal pairs. The two sets of high-speed signal pairs and the flame-retardant fillers are covered with a protective layer. The protective layer is covered with an aluminum foil Mylar layer. The aluminum foil Mylar layer is covered with a braided layer. The braided layer is covered with a sheath.

2. The vehicle-mounted high-speed LVDS connection cable according to claim 1, characterized in that: The upper iron shell cover has multiple slots on both sides, and anti-misalignment stops are provided in the slots; the lower iron shell cover has multiple buckles on both sides, and the buckles are engaged and fixed with the slots; the front end of the upper iron shell cover is completely covered with the electrical connection component, the rear end of the upper iron shell cover has a riveting area, and the rear end of the lower iron shell cover has a riveting area. The riveting areas of the upper and lower iron shell covers fix the LVDS connection wire by riveting.

3. The vehicle-mounted high-speed LVDS connection cable according to claim 1, characterized in that: The conductors and ground wires are colored differently depending on the usage requirements.

4. The vehicle-mounted high-speed LVDS connection cable according to claim 1, characterized in that: The protective layer is made of PET material.

5. The vehicle-mounted high-speed LVDS connection cable according to claim 1, characterized in that: The aluminum foil Mylar layer is made of aluminum foil and polyester film bonded together.

6. The vehicle-mounted high-speed LVDS connection cable according to claim 1, characterized in that: The sheath is made of PVC material.

7. A method for preparing the LVDS connector according to any one of claims 1-6, characterized in that: The process includes the following steps: preparing an LVDS connector cable; removing the outer sheath of the core wire at the connector; turning the braided layer inside out and wrapping the core wire with copper foil before connecting it to the power connection assembly; when connecting the LVDS connector cable to the power connection assembly in the connector, the high-speed signal alignment conductor and ground wire are pre-positioned using color sequence and then low-voltage injection molded and fixed at the end away from the PIN pin in the PIN pin slot; the PIN pins are pre-tinned, and multiple PIN pins are pre-tinned and inserted into the double-row PIN pin slots. After the high-speed signal alignment conductor and ground wire are positioned, they are soldered to the PIN pins using a pre-tinned soldering method on both sides of the integrated HUB, and the entire double-sided soldering is completed in one go.

8. The method for preparing an LVDS connector according to claim 7, characterized in that: The LVDS connection cable used for connecting the power connection components shall have a stripping size not exceeding 10mm, and the aluminum foil Mylar on the high-speed signal centering conductor and ground wire inside the LVDS connection cable shall be retained by no less than 7mm.

9. A method for preparing an LVDS connector according to claim 7, characterized in that: The high-speed signal pair center wire is stripped by 1.5mm-2mm, and the gap between the connector and the high-speed signal pair Mylar is 1mm-1.5mm.

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