Long-distance optical fiber data transmission interface adapter and electronic equipment thereof

Abstract

The utility model discloses a long-distance optical fiber data transmission interface adapter, and relates to the technical field of control circuits. The system comprises a first interface, the first interface is connected with Host equipment, and the first interface is used for carrying out data transmission with the Host equipment; the second interface is connected with the AOC, and the second interface is used for carrying out data transmission with the AOC; the CC pin of the first interface is electrically connected with the CC pin of the second interface through the control circuit, and when CC channel communication is carried out between a Device connected with an AOC and a Host device, the control circuit adjusts the CC channel of the Device to be configured into a 1Lane communication mode or a 2Lane communication mode. According to the embodiment of the utility model, through the adjustment of the control circuit, when CC channel communication is carried out between the Device and the Hos t device, the CC channel of the Device can be configured to be in a 1Lane or 2Lane communication mode, thereby avoiding the compatibility problem caused by mismatching of signal transmission modes.

Description

Technical Field

[0001] This utility model relates to the field of long-distance signal transmission technology, specifically to a long-distance optical fiber data transmission interface adapter and its electronic device. Background Technology

[0002] AOC (Active Optical Cable) is a type of cable that utilizes optical fiber technology for high-speed data transmission. It is widely used in fields requiring long-distance, high-bandwidth data transmission. Compared to traditional cables, AOC uses optical fiber as the signal transmission medium, resulting in lower signal attenuation and stronger resistance to electromagnetic interference. It is commonly used in audio-visual equipment, computer peripherals, data centers, high-performance computing, and other applications. AOC can effectively solve the signal attenuation problem of traditional copper cables in long-distance transmission, providing high-quality signal transmission and has been widely used in modern high-speed data transmission.

[0003] Existing AOC products typically use a fixed 2-lane configuration for data transmission, with 1 lane for transmission from the host device to the device and 1 lane for the reverse transmission from the device to the host, achieving full-duplex data transmission. However, due to the fixed 2-pair transmission configuration, existing AOC products cannot meet the 4-lane signal transmission requirements in unidirectional audio and video transmission, which greatly limits their versatility across different devices. Utility Model Content

[0004] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a long-distance optical fiber data transmission interface adapter, including a first interface, which is connected to a host device and used for data transmission with the host device.

[0005] A second interface, the second interface being connected to the AOC, the second interface being used for data transmission with the AOC; and

[0006] The control circuit connects the CC pin of the first interface to the CC pin of the second interface via the control circuit, wherein:

[0007] When the Device connected to the AOC communicates with the Host device via the CC channel, the control circuit adjusts the CC channel configuration of the Device to either 1-lane communication mode or 2-lane communication mode.

[0008] Furthermore, the CC1 pin of the first interface is electrically connected to the CC pin of the second interface through the control circuit, and the CC2 pin of the first interface is electrically connected to the CC pin of the second interface through the control circuit.

[0009] Furthermore, the SBU1 pin of the first interface is electrically connected to the SBU1 pin of the second interface through the control circuit, and the SBU2 pin of the first interface is electrically connected to the SBU2 pin of the second interface through the control circuit.

[0010] Furthermore, a first switch and a second switch are provided between the VBUS pin of the first interface and the VBUS pin of the second interface. The first port of the first switch is connected to the first port of the first switch, the second port of the first switch is connected to the VBUS pin of the first interface, the second port of the second switch is connected to the VBUS pin of the first interface, the third port of the first switch is connected to the first enable port of the control circuit, and the third port of the second switch is connected to the second enable port of the control circuit. The control circuit controls the first switch and the second switch through the first enable port and the second enable port, respectively.

[0011] Furthermore, the TX pin of the first interface is electrically connected to the TX pin of the second interface through the control circuit, the RX pin of the first interface is electrically connected to the RX pin of the second interface through the control circuit, the DPlane1 pin of the first interface is electrically connected to the DPlane1 pin of the second interface through the control circuit, the DPlane2 pin of the first interface is electrically connected to the DPlane2 pin of the second interface through the control circuit, and the GND pin of the first interface is electrically connected to the GND pin of the second interface through the control circuit.

[0012] Furthermore, when the Device connected to the AOC communicates with the Host device via the CC channel, the control circuit configures the Host device as Rd and the Device device as Rp through the CC channel.

[0013] On the other hand, an electronic device is also provided, which includes at least an AOC and a long-distance optical fiber data transmission interface adapter. The AOC is connected to a second interface of the long-distance optical fiber data transmission interface adapter, and the long-distance optical fiber data transmission interface adapter is the aforementioned long-distance optical fiber data transmission interface adapter.

[0014] Furthermore, the CC pin of the AOC is connected to the CC pin of the second interface, the TX pin of the AOC is electrically connected to the TX pin of the second interface, the RX pin of the AOC is electrically connected to the RX pin of the second interface, the DPlane1 pin of the AOC is electrically connected to the DPlane1 pin of the second interface, the DPlane2 pin of the AOC is electrically connected to the DPlane2 pin of the second interface, the SBU1 pin of the AOC is electrically connected to the SBU1 pin of the second interface, the SBU2 pin of the AOC is electrically connected to the SBU2 pin of the second interface, the VBUS pin of the AOC is electrically connected to the VBUS pin of the second interface, and the GND pin of the AOC is electrically connected to the GND pin of the second interface.

[0015] Furthermore, the connection direction between the second interface and the AOC is designed to prevent mistakes.

[0016] This utility model embodiment, through the adjustment of the control circuit, can configure the CC channel of the Device to a 1-lane or 2-lane communication mode when the Device communicates with the Host device via the CC channel, thereby adapting to the signal transmission requirements between different devices and avoiding compatibility problems caused by mismatched signal transmission modes in the prior art. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a pin diagram of a USB-C interface in the prior art;

[0019] Figure 2 This is a block diagram illustrating the principle of AOC in existing technology;

[0020] Figure 3 This is a schematic block diagram of an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of another embodiment of the present invention. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] In this invention, the Host device refers to the main control device that is connected to a long-distance fiber optic data transmission interface adapter via a USB-C interface. It is usually a computer, smartphone, or other electronic device with data processing and control functions, and is responsible for initiating data transmission requests.

[0027] Device refers to the controlled device connected to the second interface of a long-distance fiber optic data transmission interface adapter. It is usually external hardware or peripheral devices, such as monitors, external storage devices, network devices, cameras, printers, and audio-visual devices.

[0028] AOC, short for Active Optical Cable, refers to a transmission medium integrating optical fiber communication technology for high-speed data transmission via optical fiber. In this invention, AOC transmits data between the host device and the device via its optical fiber transmission link, and manages the configuration and power supply during communication through electrical signals from the USB-C interface. AOC ensures high-quality and low-loss signal transmission over long distances and supports high-bandwidth data exchange between devices. The specific configuration of AOC is as follows. Figure 2 As shown, further details will not be elaborated here.

[0029] Reference Figure 1The female connector of the USB-C interface has two rows of symmetrical pins, labeled as group A (A1-A12) and group B (B1-B12). The pins and functions relevant to this invention are described below:

[0030] The CC1 and CC2 pins are used in the USB-C interface for power delivery negotiation (USB Power Delivery, PD) and protocol identification, and are used to switch and transmit the CC signal.

[0031] The VBUS pin is the power supply pin, providing a voltage output from 5V to 20V to power connected devices.

[0032] The TX1- pin, TX1+ pin, RX1- pin, and RX1+ pin are replaced with DPLane1, DPLane2, TX pin, and RX pin in this embodiment of the invention. They are connected to the optical fiber through the first interface or the second interface and are all used for high-speed data transmission.

[0033] SBU1 and SBU2 are auxiliary signal channels. In this invention, the SBU1 and SBU2 pins are used to transmit low-speed data or additional control signals.

[0034] GND is the ground pin, used to provide the reference voltage for the circuit.

[0035] It should be noted that although the above description only mentions the pin distribution of the female connector of the USB-C interface, the design of this utility model is also applicable to the male connector of the USB-C interface. The male and female connectors of the USB-C interface have the same pin functions and arrangement, only the connection method is different. Therefore, the first or second interface of this utility model can be adapted and transmit signals at either end of the female or male connector.

[0036] Reference Figure 2 Existing AOC cables typically have USB-C interfaces at both ends. The TX end connects to the host device, and the RX end connects to the device. During transmission, two optical fibers are responsible for high-speed signal transmission, and two optical fibers are used to transmit DP signals or other high-definition video signals. Copper wires are used for power and control signal transmission. The CC pin serves as a configuration channel for device connection and power supply negotiation. The optoelectronic conversion component converts electrical signals to optical signals, and SBU1 and SBU2 are used for auxiliary signal transmission.

[0037] Reference Figure 3 This utility model provides a long-distance optical fiber data transmission interface adapter, comprising:

[0038] A first interface is connected to the host device and is used for data transmission with the host device.

[0039] A second interface, the second interface being connected to the AOC, the second interface being used for data transmission with the AOC; and

[0040] The control circuit connects the CC pin of the first interface to the CC pin of the second interface via the control circuit, wherein:

[0041] When the Device connected to the AOC communicates with the Host device via the CC channel, the control circuit adjusts the CC channel configuration of the Device to either 1-lane communication mode or 2-lane communication mode.

[0042] This utility model embodiment, through the adjustment of the control circuit, can configure the CC channel of the Device to a 1-lane or 2-lane communication mode when the Device communicates with the Host device via the CC channel, thereby adapting to the signal transmission requirements between different devices and avoiding compatibility problems caused by mismatched signal transmission modes in the prior art.

[0043] In one embodiment, the CC1 pin of the first interface is electrically connected to the CC pin of the second interface through the control circuit, and the CC2 pin of the first interface is electrically connected to the CC pin of the second interface through the control circuit.

[0044] In one embodiment, the SBU1 pin of the first interface is electrically connected to the SBU1 pin of the second interface through the control circuit, and the SBU2 pin of the first interface is electrically connected to the SBU2 pin of the second interface through the control circuit.

[0045] In one embodiment, a first switch and a second switch are further provided between the VBUS pin of the first interface and the VBUS pin of the second interface. The first port of the first switch is connected to the first port of the first switch, the second port of the first switch is connected to the VBUS pin of the first interface, the second port of the second switch is connected to the VBUS pin of the first interface, the third port of the first switch is connected to the first enable port of the control circuit, and the third port of the second switch is connected to the second enable port of the control circuit. The control circuit controls the first switch and the second switch through the first enable port and the second enable port, respectively.

[0046] In this embodiment, the first and second switching transistors are used for power management in short-range communication to ensure that the power flow of the VBUS pin is precisely controlled and to avoid power supply interference with data transmission. Through the control circuit, the switching states of the first and second switching transistors are adjusted to prevent power transmission between devices during short-range communication.

[0047] Specifically, the first and second switching transistors are connected to the VBUS pins of the first and second interfaces, respectively, and their on / off states are controlled by the enable port of the control circuit. During data communication, the control circuit controls the gate of the switching transistor through the enable port according to the communication requirements, thereby determining whether current is allowed to pass through the VBUS pin. During data transmission, if power transmission is not necessary, the control circuit will cut off the power supply channel by turning off the switching transistor to avoid power interference with the communication signal, ensuring that the device only exchanges data and does not supply power, thereby avoiding charging problems or power instability caused by excessive voltage drop.

[0048] In specific implementation, the first and second switching transistors can be transistors or other switching transistors with similar functions. When they are transistors, the first port of the first and second switching transistors is the source, the second port is the drain, and the third port is the gate.

[0049] In one embodiment, the TX pin of the first interface is electrically connected to the TX pin of the second interface through the control circuit, the RX pin of the first interface is electrically connected to the RX pin of the second interface through the control circuit, the DPlane1 pin of the first interface is electrically connected to the DPlane1 pin of the second interface through the control circuit, the DPlane2 pin of the first interface is electrically connected to the DPlane2 pin of the second interface through the control circuit, and the GND pin of the first interface is electrically connected to the GND pin of the second interface through the control circuit, thereby ensuring stable signal transmission.

[0050] In a specific implementation, the control circuit also includes a USB conversion chip, which can be a VL103-Q4 or other chips with similar functions. Taking the VL103-Q4 USB conversion chip as an example, the main pins used in this embodiment are as follows:

[0051] Pin2, labeled CC1_D, is used for communication with the device via the PD configuration channel to ensure that devices can negotiate power and configuration.

[0052] Pin3, pin labeled CC2_D, is similar to Pin2 and is used for another configuration channel to communicate with the device via the PD configuration channel.

[0053] Pin 5, labeled AUXP, is mainly used to transmit DisplayPort data and supports video output.

[0054] Pin 6, labeled AUXN, works with Pin 5 to transmit DisplayPort signals;

[0055] Pin 8, labeled SBU1, is used for bidirectional DisplayPort auxiliary signal transmission.

[0056] Pin 9, labeled SBU2, works with Pin 8 to transmit DisplayPort signals.

[0057] Pin10, labeled CC1_U, is connected to the CC pin of the second interface and is used for power and configuration management, as well as for transmitting configuration channel signals to the device.

[0058] In practical implementation, the pins of the first and second interfaces are connected through the pins of the USB conversion chip VL103-Q4. The first and second enable ports can be any GPIO port in the VL103-Q4. The specific connection method between the first and second interfaces and the VL103-Q4 chip is as follows:

[0059] The CC1 pin of the first interface is connected to the Pin 2 pin of the USB conversion chip VL103-Q4 to form a downlink signal link for transmitting CC signals to the second interface for power and configuration negotiation between devices, and to determine whether to enable 1-lane or 2-lane communication mode. Similar to the CC1 pin, the CC2 pin of the first interface is connected to Pin 3 (CC2_D) through the control circuit for transmitting the CC signal of the second configuration channel, thereby negotiating power supply and device configuration.

[0060] Furthermore, through Pin 5 and Pin 6 of the USB conversion chip VL103-Q4, the AUXP pin of the first interface transmits the downlink signal of DisplayPort Alt mode to the second interface. Pin 5 and Pin 6 jointly handle the transmission of DisplayPort's high-bandwidth video signal. The SBU1 pin of the first interface is connected to Pin 8 for bidirectional transmission of auxiliary signals, ensuring stable transmission of DisplayPort auxiliary signals. Similarly, the SBU2 pin of the first interface is connected to Pin 9 through the control circuit for additional auxiliary signal transmission.

[0061] In this embodiment, the communication mode of the device can be negotiated and forcibly limited to 1 Lane or 2 Lane according to bandwidth requirements through the USB conversion chip VL103-Q4, rejecting the 4 Lane communication mode. After the devices are connected, the host device and the device negotiate configuration through the CC pin and exchange bandwidth requirements for data transmission. The USB conversion chip VL103-Q4 will negotiate and limit the device to use only the 2 Lane communication mode through the signals of the CC1 and CC2 pins, ensuring that communication is carried out bidirectionally through only two fiber optic data channels.

[0062] In one embodiment, when the Device connected to the AOC communicates with the Host device via the CC channel, the control circuit configures the Host device as Rd and the Device device as Rp through the CC channel. To address the issue of excessive voltage drop that may occur when the Device device charges the Host device in reverse during long-distance transmission, resulting in charging failure, this embodiment adjusts the operating mode of the CC channel to ensure that only data transmission occurs between the Device device and the Host device, without power transmission.

[0063] In specific implementations, the control circuit in this embodiment can also use a USB conversion chip of model VL103-Q4, or other chips with similar functions.

[0064] Taking the VL103-Q4 USB converter chip as an example, when communicating between devices via the CC channel, the VL103-Q4 configures the Host device as Rd (Resistor Disabled) and the Device device as Rp (Resistor Powered) through the CC channel. By preventing devices from supplying power to each other, charging failures caused by unstable power supply, excessive voltage drop, or reverse power supply are avoided. In this case, the Host device and Device device only exchange data and no longer rely on VBUS for power transmission. Through explicit signal configuration, the Device device and Host device are informed not to supply power to each other, ensuring that reverse power supply will not occur during long-distance transmission.

[0065] Reference Figure 4 This utility model embodiment also provides an electronic device. In one embodiment, in addition to connecting other existing AOCs externally, the long-distance fiber optic data transmission interface adapter can also be directly integrated into the AOC and can be integrally molded.

[0066] Specifically, the AOC's TX pin is electrically connected to the TX pin of the second interface, responsible for transmitting data from the host device to the device. Simultaneously, the AOC's RX pin is electrically connected to the RX pin of the second interface, ensuring data is transmitted back from the device to the host device. For video signal transmission, the AOC's DPlane1 pin is electrically connected to the DPlane1 pin of the second interface, responsible for transmitting one data channel of DisplayPort signals. Similarly, the AOC's DPlane2 pin is electrically connected to the DPlane2 pin of the second interface, responsible for transmitting the other data channel. To ensure signal transmission stability, the AOC's SBU1 pin is electrically connected to the SBU1 pin of the second interface, and the SBU2 pin is electrically connected to the SBU2 pin of the second interface, used for auxiliary signal transmission, supporting bidirectional communication in DisplayPort Alt mode. The AOC's VBUS pin is electrically connected to the VBUS pin of the second interface for power transmission, providing power support between devices when needed. Simultaneously, the AOC's GND pin is electrically connected to the GND pin of the second interface, providing a common ground voltage reference.

[0067] in, Figure 4 The 5V in the circuit can be drawn directly from the host terminal, or it can be drawn after filtering using existing technology.

[0068] In one embodiment, the connection direction between the second interface and the AOC is designed to prevent incorrect connection by the user, thus ensuring the correctness and reliability of the connection.

[0069] In practice, the second interface and one end of the AOC connector can adopt an asymmetrical design, so that the plug can only be inserted in the correct direction. Common foolproof structures include plugs and sockets of different shapes, such as one end being round and the other end being rectangular, or using a keyway design to restrict the direction of the plug, ensuring that it can only be connected in the correct insertion direction. Similarly, the second interface and the AOC connector can also have a slot with protrusions or grooves to ensure that the connector can only be inserted in the correct direction.

[0070] It should be noted that since the above-described error-proof design is a conventional practice in the existing technical field, those skilled in the art can easily implement such error-proof functions through reasonable structural selection and design. Therefore, the embodiments of this utility model will not be described in detail.

[0071] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A long-distance optical fiber data transmission interface adapter, characterized in that, include: A first interface is connected to the host device and is used for data transmission with the host device. The second interface is connected to the AOC and is used for data transmission with the AOC. as well as The control circuit connects the CC pin of the first interface to the CC pin of the second interface via the control circuit, wherein: When the Device communicates with the Host device via the CC channel, the control circuit adjusts the Device's CC channel configuration to either 1-lane communication mode or 2-lane communication mode.

2. The long-distance optical fiber data transmission interface adapter according to claim 1, characterized in that, The CC1 pin of the first interface is electrically connected to the CC pin of the second interface through the control circuit, and the CC2 pin of the first interface is electrically connected to the CC pin of the second interface through the control circuit.

3. A long-distance optical fiber data transmission interface adapter according to claim 2, characterized in that, The SBU1 pin of the first interface is electrically connected to the SBU1 pin of the second interface through the control circuit, and the SBU2 pin of the first interface is electrically connected to the SBU2 pin of the second interface through the control circuit.

4. A long-distance optical fiber data transmission interface adapter according to claim 3, characterized in that, A first switch and a second switch are provided between the VBUS pin of the first interface and the VBUS pin of the second interface. The first port of the first switch is connected to the first port of the first switch, the second port of the first switch is connected to the VBUS pin of the first interface, the second port of the second switch is connected to the VBUS pin of the first interface, the third port of the first switch is connected to the first enable port of the control circuit, and the third port of the second switch is connected to the second enable port of the control circuit. The control circuit controls the first switch and the second switch through the first enable port and the second enable port, respectively.

5. A long-distance optical fiber data transmission interface adapter according to claim 4, characterized in that, The TX pin of the first interface is electrically connected to the TX pin of the second interface through the control circuit. The RX pin of the first interface is electrically connected to the RX pin of the second interface through the control circuit. The DPlane1 pin of the first interface is electrically connected to the DPlane1 pin of the second interface through the control circuit. The DPlane2 pin of the first interface is electrically connected to the DPlane2 pin of the second interface through the control circuit. The GND pin of the first interface is electrically connected to the GND pin of the second interface through the control circuit.

6. A long-distance optical fiber data transmission interface adapter according to claim 1, characterized in that, When the Device communicates with the Host device via the CC channel, the control circuit configures the Host device as Rd and the Device device as Rp through the CC channel.

7. An electronic device, characterized in that, It includes at least an AOC and a long-distance fiber optic data transmission interface adapter, wherein the AOC is connected to the second interface of the long-distance fiber optic data transmission interface adapter, and the long-distance fiber optic data transmission interface adapter is the long-distance fiber optic data transmission interface adapter as described in any one of claims 1-6.

8. An electronic device as described in claim 7, characterized in that, The AOC's CC pin is connected to the CC pin of the second interface; the AOC's TX pin is electrically connected to the TX pin of the second interface; the AOC's RX pin is electrically connected to the RX pin of the second interface; the AOC's DPlane1 pin is electrically connected to the DPlane1 pin of the second interface; the AOC's DPlane2 pin is electrically connected to the DPlane2 pin of the second interface; the AOC's SBU1 pin is electrically connected to the SBU1 pin of the second interface; the AOC's SBU2 pin is electrically connected to the SBU2 pin of the second interface; the AOC's VBUS pin is electrically connected to the VBUS pin of the second interface; and the AOC's GND pin is electrically connected to the GND pin of the second interface.

9. An electronic device as described in claim 7, characterized in that, The connection direction between the second interface and the AOC is designed to prevent mistakes.

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