WO2021228188A1 - 数据传输电缆及相关设备 - Google Patents

数据传输电缆及相关设备 Download PDF

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Publication number
WO2021228188A1
WO2021228188A1 PCT/CN2021/093549 CN2021093549W WO2021228188A1 WO 2021228188 A1 WO2021228188 A1 WO 2021228188A1 CN 2021093549 W CN2021093549 W CN 2021093549W WO 2021228188 A1 WO2021228188 A1 WO 2021228188A1
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WIPO (PCT)
Prior art keywords
transmission cable
signal
data transmission
wire
control signal
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Application number
PCT/CN2021/093549
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English (en)
French (fr)
Inventor
范尚宾
马朋伟
陈超
龚涛
王洪利
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to KR1020227043311A priority Critical patent/KR20230009956A/ko
Priority to JP2022568962A priority patent/JP2023527710A/ja
Publication of WO2021228188A1 publication Critical patent/WO2021228188A1/zh
Priority to US17/985,333 priority patent/US20230076232A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/08—Screens specially adapted for reducing cross-talk
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1091—Screens specially adapted for reducing interference from external sources with screen grounding means, e.g. drain wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/32—Filling or coating with impervious material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0054—Cables with incorporated electric resistances
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/65—Control of camera operation in relation to power supply
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/665—Control of cameras or camera modules involving internal camera communication with the image sensor, e.g. synchronising or multiplexing SSIS control signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H04N7/108—Adaptations for transmission by electrical cable the cable being constituted by a pair of wires

Definitions

  • This application relates to the field of electronic technology, in particular to a data transmission cable and related equipment.
  • MIPI bus is a data transmission interface technology used for communication between chips.
  • MIPI bus is used in the terminal field (including communication between chips such as camera, display, storage, etc.) It is becoming more and more widespread.
  • MIPI C-PHY is a serial interface technology based on three-wire three-level encoding and an embedded clock mechanism. The current C-PHY interface rate reaches 10.26Gbps.
  • MIPI bus technology will be widely used in terminal equipment chips for a long time in the future by virtue of the complete ecological industry chain, high bandwidth, low power consumption and other excellent technical characteristics, and will become Sony Sony, Samsung Samsung, Qualcomm Qualcomm, etc. The mainstream standard interface of chip manufacturers.
  • High-speed MIPI signals have strict requirements on link loss and electromagnetic interference. If excessive loss and excessive interference occur during transmission, the signal transmission quality and transmission distance will be affected, and signal decoding will fail. As the MIPI C-PHY signal rate increases from 7.98Gbps to 10.26Gbps, the MIPI bus of the same length is greatly affected by link loss and signal interference. A technology is needed to solve the problem of poor MIPI bus transmission quality, short transmission distance, and Other signal lines interfere with each other.
  • the embodiments of the present application provide a data transmission cable and related equipment, which are used to solve the problems of poor MIPI bus transmission quality, short transmission distance, and mutual interference with other signal lines.
  • an embodiment of the present application provides a data transmission cable, and the data transmission cable includes:
  • a signal wire harness includes at least three signal wires, the at least three signal wires are arranged at intervals and form a differential pair signal wire in pairs, and the differential pair signal wire is used to transmit a differential data signal;
  • a ground wire is arranged to surround and wrap the signal wiring harness, and the ground wire is used to transmit ground signals and isolate the signal wiring harness from the signal wiring harness of other data transmission cables;
  • the filling medium is provided in a space inside the ground wire except for the signal wire.
  • the cross section of the ground wire is circular, and the cross section of the at least three signal wires is circular.
  • the at least three signal lines are arranged in parallel.
  • the impedance of each signal line is greater than or equal to 45 ohms and less than or equal to 55 ohms.
  • the at least three signal lines are three signal lines, and the three signal lines are arranged in a rotationally symmetrical distribution on the inner side of the ground line.
  • the filling medium is a flexible material, and the flexible material is preferably polyethylene.
  • the data transmission cable further includes: a first protective layer, and the first protective layer covers the ground wire arrangement.
  • the first protective layer is made of insulating plastic material.
  • an embodiment of the present application provides an electronic device.
  • the electronic device includes a camera module, a device motherboard, and a transmission cable.
  • the device motherboard includes an image processor, and the transmission cable includes a second protective layer and at least Two data transmission cables according to the first aspect, the second protective layer covers the data transmission cable arrangement;
  • the camera module transmits image data to the image processor through the at least two data transmission cables as described in the first aspect.
  • the transmission cable further includes a working voltage transmission cable and a control signal transmission cable, the working voltage transmission cable and the control signal transmission cable are arranged in the second protective layer, wherein:
  • the device main board provides the operating voltage for the camera module through the operating voltage transmission cable
  • the device main board also transmits a control signal to the camera module through a control signal transmission cable.
  • the working voltage includes at least one of the following: analog voltage AVDD, digital voltage DVDD, voice coil motor voltage VCM_VDD, driver chip voltage DRV_VDD, and interface circuit voltage DOVDD.
  • control signal includes at least one of the following: a reset signal RST, a clock signal CLK, and a two-wire serial bus I2C.
  • the cross section of the transmission cable is rectangular or circular.
  • the working voltage transmission cable and the control signal transmission cable are jointly arranged on one side of the data transmission cable, and the working voltage transmission cable and the control signal transmission cable are arranged side by side.
  • the working voltage transmission cable and the control signal transmission cable are separately arranged on both sides of the connection of the at least two data transmission cables.
  • the data transmission cable includes a signal wire harness, a ground wire, and a filling medium.
  • Group differential data signals to achieve long-distance MIPI C-PHY data signal transmission and improve signal transmission quality; the ground wire surrounds and wraps the signal wiring harness.
  • the signal wiring harness can also be connected to other
  • the signal harness isolation of the data transmission cable reduces the interference between the external signal line and the internal signal line of the data transmission cable; the filling medium is set in the space inside the ground line except for the signal line, reducing the data transmission cable Interference between internal signal lines.
  • Figure 1 is a schematic diagram of an electronic system using MIPI bus to transmit data provided by the prior art
  • Fig. 2 is a schematic structural diagram of a MIPI C-PHY transmission line provided by the prior art
  • FIG. 3 is a schematic diagram of a cable structure for transmitting a pair of high-speed differential signals provided by the prior art
  • Figure 4(a) is a schematic structural diagram of a data transmission cable provided by an embodiment of the present application.
  • Fig. 4(b) and Fig. 4(c) are respectively structural schematic diagrams of a longitudinal section and a cross section of a data transmission cable provided by an embodiment of the present application;
  • FIG. 4(d) is a comparison diagram of the transmission line insertion loss of the data transmission cable provided by the embodiment of the present application and the data transmission cable provided by the prior art;
  • Figure 5 (a) is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • Figure 5(b) is a schematic cross-sectional view of a transmission cable provided by an embodiment of the present application.
  • Figure 5(c) is a schematic cross-sectional view of another transmission cable provided by an embodiment of the present application.
  • FIG. 1 is a schematic diagram of an electronic system using MIPI bus to transmit data provided by the prior art
  • FIG. 2 is a schematic diagram of a MIPI C-PHY transmission line provided by the prior art.
  • the electronic system integrates a camera module, a display module and a processor. Due to the limited volume of the electronic system, the distance between the camera module, the display module and the processor is relatively short (generally in Within 30cm), the PCB trace structure shown in Figure 2 is usually used to transmit MIPI signals between the camera module, display module and processor, and three traces (ie A, B, C) are used for transmission. MIPI C-PHY signal, this scheme puts forward strict requirements on link loss and interference between PCB traces.
  • MIPI signals are affected by PCB wiring loss, and the transmission distance is generally within 30cm, which cannot meet long-distance application scenarios such as smart screens, vehicles, and security.
  • MIPI high-speed signals are sensitive to PCB trace loss, which leads to poor signal transmission quality (such as streaks in photos).
  • the electromagnetic interference generated by it is large, and it is also susceptible to interference from other signals, which affects the stability of the equipment (such as display screens).
  • Fig. 3 is a schematic diagram of a cable structure for transmitting a pair of high-speed differential signals provided by the prior art, in which signal lines P and N form a pair of differential signals, and GND is a ground signal.
  • the cable is processed with a shielded bag, so that the differential signal can ensure the transmission quality during long-distance transmission, and the transmission distance can exceed 1 meter.
  • the embodiment of the present application provides a data transmission cable and related equipment. Refer to the following device-side embodiment.
  • Figure 4 (a) is a schematic diagram of the structure of a data transmission cable provided by an embodiment of the present application
  • Figure 4 (b) and Figure 4 (c) are structural schematic diagrams of a longitudinal section and a cross section of a data transmission cable provided by an embodiment of the present application, respectively, and the data transmission cable 100 includes:
  • a signal wiring harness 110 the signal wiring harness includes at least three signal wires, the at least three signal wires are arranged at intervals and two by two form a differential pair signal wire, and the differential pair signal wire is used to transmit a differential data signal;
  • the ground wire 120 is arranged to surround and wrap the signal wiring harness 110, and the ground wire 120 is used to transmit ground signals and to connect the signal wiring harness 110 with the signals of the other data transmission cables 100
  • the wiring harness 110 is isolated;
  • the filling medium 130 is provided in a space inside the ground line 120 except for the signal line.
  • the data transmission cable includes a signal wire harness, a ground wire, and a filling medium.
  • Group differential data signals to achieve long-distance MIPI C-PHY data signal transmission and improve signal transmission quality; the ground wire surrounds and wraps the signal wiring harness.
  • the signal wiring harness can also be connected to other
  • the signal harness isolation of the data transmission cable reduces the interference between the external signal line and the internal signal line of the data transmission cable; the filling medium is set in the space inside the ground line except for the signal line, reducing the data transmission cable Interference between internal signal lines.
  • the cross section of the ground wire 120 is circular, and the cross section of the at least three signal wires is circular.
  • the cross-sections of the at least three signal lines may also be square, rectangular, arc-shaped, or other shapes, which are not limited herein.
  • the at least three signal lines may be arranged in parallel.
  • the at least three signal wires may also be spirally wound around the same axis.
  • the distance between at least three signal lines may be equal or unequal, which is not limited here.
  • the axis can be the axis where the center of the circle is located, or the axis where any point in the circle is located, which is not limited here.
  • the impedance of each signal line is greater than or equal to 45 ohms and less than or equal to 55 ohms.
  • the at least three signal lines are three signal lines, and the three signal lines are arranged in a rotationally symmetrical distribution on the inner side of the ground line.
  • the rotational symmetry angle is 120°; if there are four signal lines, the rotational symmetry angle is 90°; if there are five signal lines, the rotational symmetry angle is 72°; And so on, no more examples.
  • the filling medium 130 is a flexible material, and the flexible material is preferably polyethylene.
  • the data transmission cable 100 further includes a first protective layer 140, and the first protective layer covers the ground wire 120.
  • the first protective layer 140 is made of an insulating plastic material.
  • FIG. 4(d) is a comparison diagram of the transmission line insertion loss of the data transmission cable provided by the embodiment of the present application and the data transmission cable provided by the prior art.
  • the data transmission cable provided in the embodiment of the present application and the data transmission cable provided in the prior art are both 1.2 m. It can be seen from FIG. 4(d) that, in the case of using the same transmission medium, the transmission line insertion loss of the data transmission cable provided in the embodiment of the application is lower than that of the data transmission cable provided in the prior art.
  • the transmission line insertion loss of the data transmission cable provided in the embodiment of the present application is reduced by 8.559 dB. Therefore, the data transmission cable provided in the embodiment of the present application can improve the transmission quality of the MIPI signal and increase the transmission distance of the MIPI signal.
  • Figure 5 (a) is a schematic structural diagram of an electronic device provided by an embodiment of the present application, applied to mobile terminals, smart screens, vehicle terminals, security terminals, etc.
  • the electronic device 200 includes a camera
  • the device main board 220 includes an image processor 221.
  • the transmission cable 230 includes a second protective layer 231 and at least two data transmission cables 100 as described above.
  • the second protective layer 231 covers the arrangement of the data transmission cable 100;
  • the camera module 210 transmits image data to the image processor 221 through the at least two data transmission cables 100 as described above.
  • multiple sets of different types of signals can be transmitted between the camera module and the device mainboard, and the interference between different signal lines is reduced through shielding protection, and the link loss is reduced through the impedance matching of the transmission line, thereby Realize long-distance transmission of high-speed signals.
  • the transmission cable 230 further includes a working voltage transmission cable 232 and a control signal transmission cable 233.
  • the working voltage transmission cable 232 and the control signal transmission cable 233 are arranged in the second protective layer 231, in:
  • the device main board 220 provides a working voltage for the camera module 210 through the working voltage transmission cable 232;
  • the device mainboard 220 also transmits control signals to the camera module 210 through the control signal transmission cable 233.
  • the working voltage includes at least one of the following: analog voltage AVDD, digital voltage DVDD, voice coil motor voltage VCM_VDD, driver chip voltage DRV_VDD, and interface circuit voltage DOVDD.
  • AVDD is the analog voltage required by the camera module
  • DVDD is the digital voltage required by the image sensor
  • VCM_VDD is the voltage required by the voice coil motor
  • DRV_VDD is the voltage required by the driver chip
  • DOVDD is the data input and output. The digital voltage required for the operation of the module.
  • control signal includes at least one of the following: a reset signal RST, a clock signal CLK, and a two-wire serial bus (Inter-Integrated Circuit, I2C).
  • RST is the abbreviation of RESET.
  • RESET is generally used in the circuit of a high-speed CPU, which means reset and initialization.
  • the RESET signal should be used to initialize the circuit when the circuit is turned on, and RESET should also be used when the circuit is abnormally crashed. The signal makes it restart.
  • CLK is the abbreviation of CLOCK
  • CLOCK is the shift pulse provided to the shift register, each pulse will cause the data to move in or out of one bit.
  • the data on the data port must be coordinated with the clock signal to transmit data normally, and the frequency of the data signal must be 1/2 times the frequency of the clock signal.
  • I2C is a simple, two-way two-wire synchronous serial bus developed by Philips. It only needs two wires to transfer information between devices connected to the bus. I2C includes serial data (SDA) and serial clock (SCL).
  • SDA serial data
  • SCL serial clock
  • the cross section of the transmission cable 230 is rectangular or circular.
  • the working voltage transmission cable 232 and the control signal transmission cable 233 are jointly arranged on one side of the data transmission cable 100, and the working voltage transmission cable 232 and the control signal transmission cable 233 are arranged side by side .
  • FIG. 5(b) is a schematic cross-sectional view of a transmission cable provided by an embodiment of the present application.
  • the working voltage transmission cable and the control signal transmission cable are co-located on one side of the data transmission cable, and the working voltage transmission cable and the control signal transmission cable are arranged side by side.
  • the working voltage transmission cables AVDD, DVDD, VCM_VDD, DRV_VDD, DOVDD, and control signal transmission cables RST, CLK, SCL, SDL form a rectangular array arranged side by side.
  • the working voltage transmission cable 232 and the control signal transmission cable 233 are separately arranged on both sides of the connection of the at least two data transmission cables 100.
  • FIG. 5(c) is a schematic cross-sectional view of another transmission cable provided by an embodiment of the present application.
  • the working voltage transmission cable and the control signal transmission cable are separately arranged on both sides of the connection of the two data transmission cables.
  • the two data transmission cables are arranged opposite to each other.

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  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

一种数据传输电缆（100）及相关设备，该数据传输线缆（100）包括：信号线束（110），所述信号线束（110）包括至少三个信号线，所述至少三个信号线间隔设置并两两构成差分对信号线，所述差分对信号线用于传输差分数据信号；地线（120），所述地线（120）环绕并包覆所述信号线束（110）设置，所述地线（120）用于传输地信号以及将所述信号线束（110）与其他所述数据传输线缆（100）的所述信号线束（110）隔离；填充介质（130），所述填充介质（130）设于所述地线（120）内侧除所述信号线之外的空间。可解决MIPI总线传输质量差、传输距离短以及与其他信号线相互干扰的问题。

Description

数据传输电缆及相关设备
本申请要求于2020年05月14日提交中国专利局、申请号为202010409589.6、申请名称为“数据传输电缆及相关设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电子技术领域，尤其涉及一种数据传输电缆及相关设备。
背景技术
移动产业处理器接口(Mobile Industry Processor Interface，MIPI)总线是一种用于芯片间通信的数据传输接口技术，目前，MIPI总线在终端领域的应用(包括摄像、显示、存储等芯片间的通信)越来越广泛，其中MIPI C-PHY是一种基于三线三电平编码方式和嵌入式时钟机制的串行接口技术，当前C-PHY接口速率达到10.26Gbps。MIPI总线技术凭借完整的生态产业链，高带宽、低功耗等优异的技术特性将在未来很长一段时间内被广泛地用于终端设备的芯片，并成为索尼Sony、三星Samsung、高通Qualcomm等芯片厂家的主流标准接口。
高速MIPI信号对链路损耗和电磁干扰有严格要求，如果在传输过程中出现损耗过高、干扰过大的情况，会影响信号传输质量和传输距离，导致信号解码失败。随着MIPI C-PHY信号速率从7.98Gbps提升到10.26Gbps，同样长度的MIPI总线受到链路损耗和信号干扰的影响大幅增加，需要一种技术来解决MIPI总线传输质量差、传输距离短以及与其他信号线相互干扰的问题。
发明内容
本申请实施例提供一种数据传输电缆及相关设备，用于解决MIPI总线传输质量差、传输距离短以及与其他信号线相互干扰的问题。
第一方面，本申请实施例提供一种数据传输线缆，所述数据传输线缆包括：
信号线束，所述信号线束包括至少三个信号线，所述至少三个信号线间隔设置并两两构成差分对信号线，所述差分对信号线用于传输差分数据信号；
地线，所述地线环绕并包覆所述信号线束设置，所述地线用于传输地信号以及将所述信号线束与其他所述数据传输线缆的所述信号线束隔离；
填充介质，所述填充介质设于所述地线内侧除所述信号线之外的空间。
可选的，所述地线的横截面为圆环形，所述至少三个信号线的横截面为圆形。
可选的，所述至少三个信号线平行设置。
可选的，每个信号线的阻抗大于或等于45欧姆，且小于或等于55欧姆。
可选的，所述至少三个信号线为三个信号线，三个所述信号线呈旋转对称分布设于所述地线内侧。
可选的，所述填充介质为柔性材料，所述柔性材料优选为聚乙烯。
可选的，所述数据传输线缆还包括：第一保护层，所述第一保护层包覆所述地线设置。
可选的，所述第一保护层为绝缘塑胶材料。
第二方面，本申请实施例提供一种电子设备，所述电子设备包括摄像模块、设备主板和传输线缆，所述设备主板包括图像处理器，所述传输线缆包括第二保护层和至少两个如第一方面所述的数据传输线缆，所述第二保护层包覆所述数据传输线缆设置；
所述摄像模块通过所述至少两个如第一方面所述的数据传输线缆为所述图像处理器传输图像数据。
可选的，所述传输线缆还包括工作电压传输电缆、控制信号传输电缆，所述工作电压传输电缆和所述控制信号传输电缆设于所述第二保护层内，其中：
所述设备主板通过所述工作电压传输电缆为所述摄像模块提供工作电压；
所述设备主板还通过控制信号传输电缆向所述摄像模块传输控制信号。
可选的，所述工作电压包括以下至少一种：模拟电压AVDD、数字电压DVDD、音圈马达电压VCM_VDD、驱动芯片电压DRV_VDD、接口电路电压DOVDD。
可选的，所述控制信号包括以下至少一种：复位信号RST、时钟信号CLK、两线式串行总线I2C。
可选的，所述传输线缆的横截面为矩形或圆形。
可选的，所述工作电压传输电缆与所述控制信号传输电缆共同设于所述数据传输电缆的一侧，且所述工作电压传输电缆与所述控制信号传输电缆并排设置。
可选的，所述工作电压传输电缆与所述控制信号传输电缆分设于所述至少两个数据传输线缆的连线的两侧。
可以看出，在本申请实施例中，数据传输线缆包括信号线束、地线和填充介质，信号线束包括的至少三个信号线间隔设置并两两构成差分对信号线，从而可以传输至少三组差分数据信号，实现了长距离的MIPI C-PHY数据信号传输，提高了信号传输质量；地线环绕并包覆该信号线束设置，在传输地信号的同时，还可以将该信号线束与其他数据传输线缆的信号线束隔离，减少了外部信号线对该数据传输线缆内部信号线之间的干扰；填充介质设于地线内侧除信号线之外的空间，减少了该数据传输线缆内部信号线之间的互相干扰。
本申请的这些方面或其他方面在以下实施例的描述中会更加简明易懂。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是现有技术提供的一种使用MIPI总线传输数据的电子***示意图；
图2是现有技术提供的一种MIPI C-PHY传输线的结构示意图；
图3是现有技术提供的一种用于传输一对高速差分信号的线缆结构示意图；
图4(a)是本申请实施例提供的一种数据传输线缆的结构示意图；
图4(b)和图4(c)分别是本申请实施例提供的一种数据传输线缆的纵截面和横截面 的结构示意图；
[根据细则91更正 20.05.2021]　
图4(d)是本申请实施例提供的数据传输线缆与现有技术提供的数据传输线缆的传输线***损耗对比图；
图5(a)是本申请实施例提供的一种电子设备的结构示意图；
图5(b)是本申请实施例提供的一种传输线缆的横截面示意图；
图5(c)是本申请实施例提供的另一种传输线缆的横截面示意图。
具体实施方式
为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分的实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本申请保护的范围。
以下分别进行详细说明。
本申请的说明书和权利要求书及所述附图中的术语“第一”、“第二”、“第三”和“第四”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、***、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
以下，对本申请中的部分用语进行解释说明，以便于本领域技术人员理解。
请参阅图1和图2，图1是现有技术提供的一种使用MIPI总线传输数据的电子***示意图，图2是现有技术提供的一种MIPI C-PHY传输线的结构示意图。如图1所示，该电子***中集成了摄像模组、显示模组和处理器，由于该电子***的体积有限，摄像模组、显示模组与处理器之间的距离较近(一般在30cm的范围内)，所以摄像模组、显示模组和处理器之间通常采用如图2所示的PCB走线结构来传输MIPI信号，采用三根走线(即A、B、C)来传输MIPI C-PHY信号，这种方案对链路损耗、PCB走线间的干扰提出了严格的要求。
因此，上述方案存在以下三个缺点：
第一，MIPI信号受PCB走线损耗影响，传输距离一般在30cm内，无法满足智慧屏、车载、安防等长距离应用场景。
第二，MIPI高速信号对PCB走线损耗敏感导致信号的传输质量差(如：照片存在条纹等问题)。
第三，由于MIPI信号传输速率高，其产生的电磁干扰大，也易受其他信号的干扰，影响设备工作的稳定性(如：显示屏花屏)。
请参阅图3，图3是现有技术提供的一种用于传输一对高速差分信号的线缆结构示意 图，其中信号线P和N组成一对差分信号，GND为地信号。该线缆通过采用屏蔽包地处理，使得差分信号在长距离传输时能够保证传输质量，传输距离能够超过1米。
可以看出，在本方案中，由于信号线P和N只能构成一对差分信号，只能传输一组差分信号，而在用于传输C-PHY信号时，需要使用三个该种电缆进行传输，存在冗余线，导致了占用体积较大。
为了解决上述问题，本申请实施例提供了一种数据传输线缆和相关设备，参见下述装置侧实施例。
请参阅图4(a)、图4(b)和图4(c)，图4(a)是本申请实施例提供的一种数据传输线缆的结构示意图，图4(b)和图4(c)分别是本申请实施例提供的一种数据传输线缆的纵截面和横截面的结构示意图，所述数据传输线缆100包括：
信号线束110，所述信号线束包括至少三个信号线，所述至少三个信号线间隔设置并两两构成差分对信号线，所述差分对信号线用于传输差分数据信号；
地线120，所述地线120环绕并包覆所述信号线束110设置，所述地线120用于传输地信号以及将所述信号线束110与其他所述数据传输线缆100的所述信号线束110隔离；
填充介质130，所述填充介质130设于所述地线120内侧除所述信号线之外的空间。
可以看出，在本申请实施例中，数据传输线缆包括信号线束、地线和填充介质，信号线束包括的至少三个信号线间隔设置并两两构成差分对信号线，从而可以传输至少三组差分数据信号，实现了长距离的MIPI C-PHY数据信号传输，提高了信号传输质量；地线环绕并包覆该信号线束设置，在传输地信号的同时，还可以将该信号线束与其他数据传输线缆的信号线束隔离，减少了外部信号线对该数据传输线缆内部信号线之间的干扰；填充介质设于地线内侧除信号线之外的空间，减少了该数据传输线缆内部信号线之间的互相干扰。
可选的，所述地线120的横截面为圆环形，所述至少三个信号线的横截面为圆形。
可选的，所述至少三个信号线的横截面还可以为正方形、长方形、圆弧形，或是其他形状，在此均不做限定。
可选的，所述至少三个信号线可以平行设置。
可选的，所述至少三个信号线还可以围绕同一轴线螺旋形缠绕设置。
其中，平行设置时，至少三个信号线之间的距离可以相等也可以不等，在此不做限定。
其中，轴线可以是圆心所在的轴线，也可以是圆内任一点所在的轴线，在此不做限定。
可选的，每个信号线的阻抗大于或等于45欧姆，且小于或等于55欧姆。
可选的，所述至少三个信号线为三个信号线，三个所述信号线呈旋转对称分布设于所述地线内侧。
需要说明的是，若为三个信号线，则旋转对称角度为120°；若为四个信号线，则旋转对称角度为90°；若为五个信号线，则旋转对称角度为72°；依此类推，不再举例说明。
可选的，所述填充介质130为柔性材料，所述柔性材料优选为聚乙烯。
可选的，所述数据传输线缆100还包括：第一保护层140，所述第一保护层包覆所述地线120设置。
可选的，所述第一保护层140为绝缘塑胶材料。
请参见图4(d)，图4(d)是本申请实施例提供的数据传输线缆与现有技术提供的数据传输线缆的传输线***损耗对比图。其中本申请实施例提供的数据传输线缆与现有技术提供的数据传输线缆均为1.2m。从图4(d)可以看出，在使用相同传输介质的情况下，本申请实施例提供的数据传输线缆的传输线***损耗要低于现有技术提供的数据传输线缆的传输线***损耗。其中，在1GHz频率处，本申请实施例提供的数据传输线缆的传输线***损耗降低了8.559dB。因此，本申请实施例提供的数据传输线缆能够改善MIPI信号的传输质量，提高MIPI信号的传输距离。
请参阅图5(a)，图5(a)是本申请实施例提供的一种电子设备的结构示意图，应用于移动终端、智慧屏、车载终端、安防终端等，所述电子设备200包括摄像模块210、设备主板220和传输线缆230，所述设备主板220包括图像处理器221，所述传输线缆230包括第二保护层231和至少两个如上述的数据传输线缆100，所述第二保护层231包覆所述数据传输线缆100设置；
所述摄像模块210通过所述至少两个如上述的数据传输线缆100为所述图像处理器221传输图像数据。
可以看出，在本申请实施例中，摄像模块、设备主板之间能够传输多组不同类型的信号，并且通过屏蔽保护降低不同信号线之间的干扰以及通过传输线阻抗匹配降低链路损耗，从而实现高速信号的长距离传输。
可选的，所述传输线缆230还包括工作电压传输电缆232、控制信号传输电缆233，所述工作电压传输电缆232和所述控制信号传输电缆233设于所述第二保护层231内，其中：
所述设备主板220通过所述工作电压传输电缆232为所述摄像模块210提供工作电压；
所述设备主板220还通过所述控制信号传输电缆233向所述摄像模块210传输控制信号。
可选的，所述工作电压包括以下至少一种：模拟电压AVDD、数字电压DVDD、音圈马达电压VCM_VDD、驱动芯片电压DRV_VDD、接口电路电压DOVDD。
其中，AVDD为摄像模块工作所需的模拟电压，DVDD为图像传感器工作所需的数字电压，VCM_VDD为音圈马达工作所需的电压，DRV_VDD为驱动芯片工作所需的电压，DOVDD为数据输入输出模块工作所需的数字电压。
可选的，所述控制信号包括以下至少一种：复位信号RST、时钟信号CLK、两线式串行总线(Inter－Integrated Circuit，I2C)。
其中，RST是RESET的简写，RESET信号一般用于有度CPU的电路问中，是复位、初始化的意思，在开机时要用RESET信号使电路初始化，电路工作状态出现异常死机时也要用RESET信号使之重新启动。
其中，CLK是CLOCK的简写，是提供给移位寄存器的移位脉冲，每一个脉冲将引起数据移入或移出一位。数据口上的数据必须与时钟信号协调才能正常传送数据，数据信号的频率必须是时钟信号的频率的1/2倍。
其中，I2C由Philips公司开发的一种简单、双向二线制同步串行总线。它只需要两根线即可在连接于总线上的器件之间传送信息。I2C包括串行数据(SDA)和串行时钟(SCL)。
可选的，所述传输线缆230的横截面为矩形或圆形。
可选的，所述工作电压传输电缆232与所述控制信号传输电缆233共同设于所述数据传输电缆100的一侧，且所述工作电压传输电缆232与所述控制信号传输电缆233并排设置。
请参见图5(b)，图5(b)是本申请实施例提供的一种传输线缆的横截面示意图。在图5(b)中，工作电压传输电缆与控制信号传输电缆共同设于数据传输电缆的一侧，且工作电压传输电缆与所述控制信号传输电缆并排设置，工作电压传输电缆AVDD、DVDD、VCM_VDD、DRV_VDD、DOVDD，与控制信号传输电缆RST、CLK、SCL、SDL组成矩形阵列并排设置。
可选的，所述工作电压传输电缆232与所述控制信号传输电缆233分设于所述至少两个数据传输线缆100的连线的两侧。
请参见图5(c)，图5(c)是本申请实施例提供的另一种传输线缆的横截面示意图。在图5(c)中，工作电压传输电缆与控制信号传输电缆分设于两个数据传输线缆的连线的两侧，两个数据传输线缆相对设置，工作电压传输电缆AVDD、DVDD、VCM_VDD、DRV_VDD、DOVDD，与控制信号传输电缆RST、CLK、SCL、SDL相对设置。
以上对本发明实施例进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上上述，本说明书内容不应理解为对本发明的限制。

Claims (15)

  1. 一种数据传输线缆，其特征在于，所述数据传输线缆包括：
    信号线束，所述信号线束包括至少三个信号线，所述至少三个信号线间隔设置并两两构成差分对信号线，所述差分对信号线用于传输差分数据信号；
    地线，所述地线环绕并包覆所述信号线束设置，所述地线用于传输地信号以及将所述信号线束与其他所述数据传输线缆的所述信号线束隔离；
    填充介质，所述填充介质设于所述地线内侧除所述信号线之外的空间。
  2. 根据权利要求1所述的数据传输线缆，其特征在于，所述地线的横截面为圆环形，所述至少三个信号线的横截面为圆形。
  3. 根据权利要求1或2所述的数据传输线缆，其特征在于，所述至少三个信号线平行设置。
  4. 根据权利要求1-3任一项所述的数据传输线缆，其特征在于，每个信号线的阻抗大于或等于45欧姆，且小于或等于55欧姆。
  5. 根据权利要求1-4任一项所述的数据传输线缆，其特征在于，所述至少三个信号线为三个信号线，三个所述信号线呈旋转对称分布设于所述地线内侧。
  6. 根据权利要求1-5任一项所述的数据传输线缆，其特征在于，所述填充介质为柔性材料，所述柔性材料优选为聚乙烯。
  7. 根据权利要求1-6所述的数据传输线缆，其特征在于，所述数据传输线缆还包括：第一保护层，所述第一保护层包覆所述地线设置。
  8. 根据权利要求7所述的数据传输线缆，其特征在于，所述第一保护层为绝缘塑胶材料。
  9. 一种电子设备，其特征在于，所述电子设备包括摄像模块、设备主板和传输线缆，所述设备主板包括图像处理器，所述传输线缆包括第二保护层和至少两个如权利要求1-8任一项所述的数据传输线缆，所述第二保护层包覆所述数据传输线缆设置；
    所述摄像模块通过所述至少两个如权利要求1-8任一项所述的数据传输线缆为所述图像处理器传输图像数据。
  10. 根据权利要求9所述的电子设备，其特征在于，所述传输线缆还包括工作电压传输电缆、控制信号传输电缆，所述工作电压传输电缆和所述控制信号传输电缆设于所述第二保护层内，其中：
    所述设备主板通过所述工作电压传输电缆为所述摄像模块提供工作电压；
    所述设备主板还通过所述控制信号传输电缆向所述摄像模块传输控制信号。
  11. 根据权利要求10所述的电子设备，其特征在于，所述工作电压包括以下至少一种：模拟电压AVDD、数字电压DVDD、音圈马达电压VCM_VDD、驱动芯片电压DRV_VDD、接口电路电压DOVDD。
  12. 根据权利要求10所述的电子设备，其特征在于，所述控制信号包括以下至少一种：复位信号RST、时钟信号CLK、两线式串行总线I2C。
  13. 根据权利要求9-12所述的电子设备，其特征在于，所述传输线缆的横截面为矩形或圆形。
  14. 根据权利要求9-13任一项所述的电子设备，其特征在于，所述工作电压传输电缆与所述控制信号传输电缆共同设于所述数据传输电缆的一侧，且所述工作电压传输电缆与所述控制信号传输电缆并排设置。
  15. 根据权利要求9-13任一项所述的电子设备，其特征在于，所述工作电压传输电缆与所述控制信号传输电缆分设于所述至少两个数据传输线缆的连线的两侧。
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