DVI Dual Link Optical Transceiver and System

Abstract

The application relates to the technical field of communication, in particular to a DVI Dual Link optical terminal and system. The DVI Dual Link optical terminal and system comprises a DVI Dual Link communication end, a photoelectric signal converter and another DVI Dual Link optical terminal. The DVI Dual Link communication end is used for connecting the communication end of a preset first device and realizing communication with the preset first device. The photoelectric signal converter is connected with the DVI Dual Link end and is used for converting electric signals and optical signals. The photoelectric signal converter is also used for connecting the photoelectric signal converter of another DVI Dual Link optical terminal through an optical fiber to realize signal transmission between the two DVI Dual Link optical terminals. The other DVI Dual Link optical terminal is used for connecting the communication end of a preset second device. The preset first device and the second device communicate through the DVI Dual Link optical terminal.

Description

Technical Field

[0001] This application relates to the field of communication-related technologies, specifically to a DVI Dual Link optical transceiver and system. Background Technology

[0002] Most common DVI Dual Link interfaces currently use copper wire transmission. Due to the attenuation characteristics of electrical signals on copper cables, DVI signals continuously weaken over long distances. When the attenuation reaches a certain level, signal transmission will be lost or interrupted, making effective transmission impossible. The effective distance for transmitting DVI signals using traditional cables is approximately 15 meters. When the actual distance exceeds 15 meters, traditional cable transmission will fail, unable to meet practical application requirements. Summary of the Invention

[0003] In view of this, embodiments of this application are intended to provide a DVI Dual Link optical transceiver and system.

[0004] This application provides a DVI Dual Link optical transceiver, including:

[0005] A DVI Dual Link communication terminal is used to connect to the communication terminal of a preset first device to realize communication with the preset first device;

[0006] A photoelectric signal converter, connected to the DVI Dual Link terminal, is used to convert electrical signals into optical signals;

[0007] The photoelectric signal converter is also used to connect to another DVI Dual Link optical transceiver via optical fiber, so as to realize the transmission of signals between the two DVI Dual Link optical transceivers.

[0008] The other DVI Dual Link optical transceiver is used to connect to the communication end of a pre-set second device;

[0009] The preset first device and the second device communicate with each other via a DVI Dual Link optical transceiver.

[0010] In some embodiments, the photoelectric signal converter includes: a control chip;

[0011] The control chip receives a +5V signal from the video source and, after receiving the first signal, replies with an HPD signal to the video source. It also provides a transparent I2C channel for the pass-through of EDID status read commands; and / or,

[0012] The control chip is used to send a +5V signal to the display, obtain the HPD signal returned by the display, and after obtaining the HPD signal, send a first instruction to another connected DVI Dual Link optical transceiver to set its own I2C state to slave state and wait for the video source to initiate the EDID state read instruction.

[0013] In some embodiments, the photoelectric signal converter includes: an SP1401TX module and / or an SP1401RX module;

[0014] The SP1401TX module is used to convert TMDS signals into optical signals;

[0015] The SP1401RX module is used to convert optical signals into TMDS signals.

[0016] In some embodiments, the photoelectric signal converter includes:

[0017] The number of SP1401TX modules is at least two; or,

[0018] The number of SP1401RX modules is at least two.

[0019] In some embodiments, the photoelectric signal converter includes a power supply module.

[0020] In some embodiments, the photoelectric signal converter includes: the power supply module includes a battery and / or a power supply interface.

[0021] In some embodiments, the DVI Dual Link communication terminal is connected to the photoelectric signal converter via a cable.

[0022] In some embodiments, the DVI Dual Link communication terminal is a DVI Dual Link connector.

[0023] This application also provides a DVI Dual Link optical transceiver system, including:

[0024] The first DVI Dual Link optical transceiver is used to connect to the video source communication interface;

[0025] The second DVI Dual Link optical transceiver is used to connect to the communication interface on the display.

[0026] The first DVI Dual Link optical transceiver and the second DVI Dual Link optical transceiver are connected by optical fiber;

[0027] The video source communicates with the display via the DVI Dual Link optical transceiver system.

[0028] The first DVI Dual Link optical transceiver and the second DVI Dual Link optical transceiver are as described in claim 1.

[0029] In some embodiments, the control chip of the internal optoelectronic signal converter of the first DVI Dual Link optical transceiver is used to: receive a +5V signal from the video source end, and after acquiring the first signal, reply with an HPD signal to the video source end, while providing a transparent I2C channel for the transparent transmission of EDID status reading instructions; the internal optoelectronic signal converter of the first DVI Dual Link optical transceiver includes: SP1401TX module;

[0030] The control chip of the internal optoelectronic signal converter of the second DVI Dual Link optical transceiver is used to send a +5V signal to the display, obtain the HPD signal returned by the display, and after obtaining the HPD signal, send a first command to the other connected DVI Dual Link optical transceiver to set its own I2C state to slave state and wait for the video source to initiate the EDID status read command; the internal optoelectronic signal converter of the second DVI Dual Link optical transceiver includes: SP1401RX module.

[0031] The solution provided in this application effectively solves the signal attenuation problem of traditional copper wire DVI Dual Link interfaces during long-distance transmission by converting electrical signals into optical signals and transmitting them through optical fibers. This significantly extends the signal transmission distance from approximately 15 meters to 5000 meters, meeting the needs of more long-distance transmission applications. As a transmission medium, optical fiber has better resistance to electromagnetic interference than copper wire. This means that when using a DVI Dual Link optical transceiver for signal transmission, the signal is more stable, ensuring image and video quality, and is unaffected by external electromagnetic waves. Due to the characteristics of optical fiber transmission, signal integrity is well maintained during transmission, reducing potential distortion and noise, thus guaranteeing transmission quality. This optical transceiver is designed to connect pre-set first and second devices, meaning it is compatible with existing DVI Dual Link interface devices without requiring large-scale modifications or replacements, reducing upgrade costs. Optical fiber cables are lighter and thinner than traditional copper cables, making cabling more flexible and easier to deploy. At the same time, the maintenance cost of optical fiber is relatively low, helping to reduce overall operation and maintenance costs. Fiber optic transmission is generally more energy-efficient than copper wire transmission because fiber optics has lower transmission loss and requires less power, thus helping to reduce energy consumption. The DVIDual Link interface itself supports high-bandwidth transmission, and this optical transceiver can maintain this high-bandwidth characteristic, making it suitable for the transmission of high-resolution video and image data. Attached Figure Description

[0032] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0033] Figure 1 This is a schematic diagram of the structure of a DVI Dual Link optical transceiver provided in one embodiment of this application.

[0034] Figure 2 This application describes the principle and implementation steps of DVI Dual Link cable transmission.

[0035] Figure 3 This is a diagram showing the connection structure between the DVI Dual Link optical transceiver system and peripheral equipment provided in this application.

[0036] Figure 4This is a diagram illustrating the working principle and steps of the DVI Dual Link optical transceiver system in this application.

[0037] Figure label:

[0038] 1. DVI Dual Link communication terminal; 2. Optoelectronic signal converter;

[0039] 21. Control chip; 22. Signal conversion module;

[0040] 23. Power supply module; Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Application Overview

[0043] First, let's explain some of the terms used in this application:

[0044] DVI stands for Digital Visual Interface, a video interface standard designed to transmit uncompressed digital video. The DVI interface can send uncompressed digital video data to display devices, and is therefore widely used in various monitors, digital projectors, televisions, computer hosts, cameras, game consoles, video capture devices, and many other video input / output devices.

[0045] The DVI interface includes three different interface types: DVI-A, DVI-D, and DVI-I. DVI-A supports analog signals (basically obsolete and rarely seen in the market), DVI-D supports digital signals, and DVI-I supports both digital and analog signals. DVI-D and DVI-I are further available in single-link and dual-link versions, respectively. The invention patent described below primarily focuses on the DVI Dual Link design. The only difference between the two is the number of digital pins (18 pins for single-link, 24 pins for dual-link). Dual-link DVI has twice the transmission bandwidth of single-link DVI, and is backward compatible with single-link mode, while single-link is not compatible with dual-link mode.

[0046] Most common DVI Dual Link interfaces currently use copper wire transmission. Due to the attenuation characteristics of electrical signals on copper cables, DVI signals continuously weaken over long distances. When the attenuation reaches a certain level, signal transmission will be lost or interrupted, making effective transmission impossible. The effective distance for transmitting DVI signals using traditional cables is approximately 15 meters. When the actual distance exceeds 15 meters, traditional cable transmission will fail, unable to meet practical application requirements.

[0047] To address the aforementioned issues, this application provides a solution that converts DVI Dual Link electrical signals into optical signals, replacing the traditional cable transmission medium with optical fiber. This avoids long-distance cable transmission losses and electrical signal interference, enabling long-distance optical transmission of DVI Dual Link and effectively increasing the transmission distance to 5000 meters. This meets the practical transmission distance requirements for most applications.

[0048] After introducing the basic principles of this application, various non-limiting embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0049] Exemplary device

[0050] like Figure 1 As shown, the DVI Dual Link optical transceiver provided in this application includes:

[0051] A DVI Dual Link communication terminal is used to connect to the communication terminal of a preset first device to realize communication with the preset first device;

[0052] A photoelectric signal converter, connected to the DVI Dual Link terminal, is used to convert electrical signals into optical signals;

[0053] The photoelectric signal converter is also used to connect to another DVI Dual Link optical transceiver via optical fiber, so as to realize the transmission of signals between the two DVI Dual Link optical transceivers.

[0054] The other DVI Dual Link optical transceiver is used to connect to the communication end of a pre-set second device;

[0055] The preset first device and the second device communicate with each other via a DVI Dual Link optical transceiver.

[0056] In the solution provided in this application, an optoelectronic signal converter is responsible for converting the electrical signal received by the DVI Dual Link communication terminal into an optical signal for transmission in optical fiber. It should be noted that this conversion is crucial for achieving long-distance transmission because optical signals experience minimal propagation loss and are unaffected by electromagnetic interference in optical fibers. The optoelectronic signal converter has the capability to connect to another DVI Dual Link optical transceiver via optical fiber. This connection allows signals to be transmitted between the two transceivers, thus completing long-distance signal transmission. The other DVI Dual Link optical transceiver converts the received optical signal back into an electrical signal. This transceiver connects to a pre-set second device (such as a monitor, projector, etc.) to complete the final signal transmission. Thus, through the aforementioned optoelectronic signal conversion and optical fiber transmission, the pre-set first and second devices can achieve long-distance communication via the DVI Dual Link optical transceiver. This communication method is particularly suitable for applications requiring high bandwidth and long-distance transmission.

[0057] Specifically, in existing technologies, the principle and implementation steps of DVI Dual Link copper wire cable transmission are as follows: Figure 2 As shown, it includes the following steps:

[0058] The video source sends a +5V signal to the monitor via the cable connected to the DVI interface. Once the monitor receives the +5V signal from the host, it enters a ready state. If the monitor does not receive the +5V signal from the host, it assumes there is no connection and does not operate.

[0059] After receiving the +5V signal from the video source, the monitor outputs an HPD signal to the host for cable connection / removal detection. If the video source receives a correct HPD signal, it indicates a normal cable connection, allowing for further communication. Otherwise, it assumes the cable is not connected and stops all subsequent operations.

[0060] After the cable plug-in / plug-out test is completed, the host computer will read the monitor's EDID information (EDID is the monitor's extended information, which includes the monitor's signal, manufacturer, supported optimal resolution, etc.) through the DDC channel in the cable. This is to ensure that the graphics card accurately outputs the most suitable video data to the monitor.

[0061] After the video source reads the accurate EDID information from the monitor, it begins to send video data to the monitor. The monitor then receives the video data and converts it into a video image that is visible to the human eye.

[0062] In the DVI Dual Link optical transceiver provided in this application, to realize the existing DVI Dual Link communication method, the photoelectric signal converter includes: a control chip, an SP1401TX module and / or an SP1401RX module.

[0063] The control chip is used to receive a +5V signal from the video source, and after acquiring the first signal, to send back an HPD signal to the video source. It also provides a transparent I2C channel for the pass-through of EDID status read commands. Alternatively, the control chip can send a +5V signal to the display, acquire the HPD signal returned by the display, and after acquiring the HPD signal, send a first command to another connected DVI Dual Link optical transceiver, setting its own I2C state to slave mode and waiting for the video source to initiate an EDID status read command.

[0064] With this configuration, the control chip can be used to achieve signal handshake and detection, as well as the transparent transmission of EDID information, as detailed below:

[0065] The control chip first receives the +5V signal from the video source, which is the standard power signal for the DVI interface, indicating that the video source device is ready to communicate. Once the control chip detects this +5V signal, it replies with a Hot Plug Detect (HPD) signal to the video source. The HPD signal is an important handshake mechanism used to confirm that the monitor is connected and ready to receive signals.

[0066] The control chip provides a transparent I2C channel, which is the communication protocol used in the DVI interface to transmit the display's EDID (Extended Display Identification Data). EDID data contains important information such as the display's manufacturer information, serial number, production cycle, supported resolutions, and color characteristics. This information is crucial for the video source device, as it needs to optimize the output video signal based on this information.

[0067] In practical applications, when the control chip sends a +5V signal to the monitor, it waits for the monitor to return an HPD signal. This HPD signal confirms the monitor's presence and readiness. Once received, the control chip sends a command to another DVI Dual Link optical transceiver to set its own I2C channel status to slave mode. This means the transceiver is ready to receive EDID read commands from the video source, thus implementing communication state management. These actions by the control chip ensure that the communication protocol between the video source and the monitor is correctly established before the electrical signal to optical signal conversion. In this way, the control chip ensures smooth signal transmission and reception, avoiding signal transmission problems caused by communication protocol mismatch or handshake failure.

[0068] The chip can be an MCU (Microcontroller Unit).

[0069] Furthermore, the SP1401TX module is used to convert TMDS signals into optical signals;

[0070] The SP1401RX module is used to convert optical signals into TMDS signals.

[0071] Specifically, the SP1401TX module is responsible for converting the high-speed Serial Differential Signal (TMDS) transmitted via the DVI Dual Link interface into an optical signal. TMDS is a technology used for high-speed transmission of digital signals that reduces electromagnetic interference by minimizing signal conversion. The SP1401TX module typically includes active electronics, such as lasers or LEDs, to generate the optical signal corresponding to the TMDS signal. The SP1401RX module, in contrast to the SP1401TX module, converts the received optical signal back into a TMDS electrical signal. This is typically achieved through photodetectors, which convert the optical signal into an electrical signal, which is then processed by an analog-to-digital converter (ADC) or other circuitry to recover the original TMDS signal.

[0072] Correspondingly, there are three types of DVI Dual Link optical transceivers:

[0073] Transmitter-side optical transceiver: This configuration of optical transceiver includes an SP1401TX module, located at the signal source end (such as a computer's graphics card). Its function is to convert the TMDS signal from the DVI Dual Link interface into an optical signal and transmit it through optical fiber.

[0074] Receiver-end optical transceiver: At the signal receiving end (such as a monitor or projector), this type of optical transceiver contains an SP1401RX module, which is responsible for converting the optical signal transmitted through the optical fiber back into a TMDS electrical signal so that the monitor can display the image correctly.

[0075] Bidirectional optical transceivers: In some applications, bidirectional transmission may be required, meaning there is a need for signal transmission in both directions. In this case, the optical transceiver may contain both SP1401TX and SP1401RX modules to achieve bidirectional signal conversion and transmission.

[0076] These three configurations of optical transceivers can be selected and designed according to actual application needs to meet different signal transmission and system compatibility requirements. By using these modules, DVI Dual Link optical transceivers can achieve long-distance, high-bandwidth digital video signal transmission while maintaining signal integrity and quality.

[0077] Furthermore, the photoelectric signal converter includes a power supply module. The power supply module includes a battery and / or a power supply interface.

[0078] The power supply module provides the necessary electrical energy to all electronic components in the photoelectric signal converter. This includes powering the control chip, the SP1401TX module (responsible for electrical-to-optical conversion), the SP1401RX module (responsible for optical-to-electrical conversion), and other possible circuits.

[0079] Battery-powered modules allow optical transceivers to operate without an external power source, which is extremely useful for mobile applications or environments where stable power is difficult to access. Battery power also provides a degree of redundancy, ensuring continuous system operation in the event of an unexpected external power outage. A power interface allows the optical transceiver to be connected to an external power source, such as a wall outlet, power adapter, or uninterruptible power supply (UPS) system. Using a power interface provides a more stable power supply and typically supports higher power requirements, making it suitable for fixed installations and long-term operation applications.

[0080] Furthermore, the power supply module may include power management functions such as voltage regulation, overcurrent protection, and battery charging management to ensure the safe and stable operation of the system.

[0081] In some designs, the power supply module may include power selection logic that can automatically or manually select the preferred power source (such as battery or external power) and seamlessly switch between power sources.

[0082] Specifically, in some embodiments, the DVI Dual Link communication terminal is connected to the optoelectronic signal converter via a cable. The cable's function is to transmit electrical signals from the DVI Dual Link communication terminal to the optoelectronic signal converter. These signals include video data, control signals, and possibly power signals. Using cable connections provides flexibility in installation and layout. Cables can be extended or shortened as needed to adapt to different installation environments and distance requirements. Cable connections are generally easier to install and maintain than fixed connections. Cable connections can be quickly disconnected and reconnected when equipment needs to be replaced or upgraded. Cable design needs to consider electromagnetic compatibility (EMC) to reduce the generation and reception of electromagnetic interference (EMI) and ensure signal integrity. High-quality cables help maintain signal integrity, especially in high-resolution video transmission, where signal fidelity is crucial for image quality. Cables should have good physical and chemical stability to resist wear, bending, and environmental effects during daily use. Cables are generally less expensive than other connection methods and are easy to mass-produce and deploy.

[0083] By connecting the DVI Dual Link communication terminal to the optoelectronic signal converter via cable, the DVI Dual Link optical transceiver solution enables efficient signal transmission while maintaining system flexibility and ease of installation. This design allows the optical transceiver to be flexibly deployed in different application scenarios, meeting the needs of various long-distance digital video signal transmission.

[0084] In some embodiments, the DVI Dual Link communication terminal is a DVI Dual Link connector or a DVI Dual Link interface.

[0085] The DVI Dual Link interface conforms to the Digital Video Interface (DVI) standard and is designed specifically for transmitting uncompressed digital video signals. It supports high-resolution video transmission by providing high bandwidth. The DVI Dual Link interface offers double the bandwidth because it uses more transmission channels (24 pins compared to 18 pins for a single link) to carry the signal. Backward compatibility: The DVI Dual Link interface is designed to be backward compatible with the DVI Single Link interface, meaning that DVI Dual Link devices can be used with single-link devices, although bandwidth will be limited. The DVI Dual Link interface supports higher resolutions and refresh rates, making it suitable for high-end monitors, projectors, and high-resolution display applications. The DVI Dual Link interface transmits digital signals, meaning it provides a sharper image quality than analog interfaces without signal degradation issues. The DVI Dual Link connector is designed to ensure a secure and reliable physical connection to the device and is easy to plug and unplug. The DVI Dual Link interface and connector are designed with electromagnetic compatibility in mind to reduce electromagnetic interference and ensure stable signal transmission. In a DVI Dual Link optical transceiver solution, the DVI Dual Link communication terminal serves as the key interface for signal input and output, allowing a direct electrical connection to be established between the device and the optical transceiver, thereby enabling efficient transmission of digital video signals. By converting these signals into optical signals, the optical transceiver can overcome the limitations of traditional copper wire transmission, achieving long-distance, high-bandwidth video transmission.

[0086] Exemplary System

[0087] Below, for reference Figure 3 Figure 4 To describe an exemplary system according to embodiments of this application.

[0088] The DVI Dual Link optical transceiver system provided in this application includes:

[0089] The first DVI Dual Link optical transceiver (as a transmitting device) is used to connect to the communication interface of the video source.

[0090] The second DVI Dual Link optical transceiver (as a receiving device) is used to connect to the communication interface on the display end;

[0091] The first DVI Dual Link optical transceiver and the second DVI Dual Link optical transceiver are connected by optical fiber;

[0092] The video source communicates with the display via the DVI Dual Link optical transceiver system.

[0093] The first DVI Dual Link optical transceiver and the second DVI Dual Link optical transceiver are DVI Dual Link optical transceivers in the exemplary device.

[0094] In the solution provided in this application, the transmitting device (the first DVI Dual Link optical transceiver) is connected to the communication interface of the video source, such as the output of a computer's graphics card or other video signal source. Its main function is to convert the DVI Dual Link electrical signal generated at the video source into an optical signal. The conversion process typically involves using an SP1401TX module, which is responsible for converting the TMDS signal into an optical signal suitable for transmission over optical fiber.

[0095] The receiving device (the second DVI Dual Link optical transceiver) connects to the communication interface at the display end, such as the DVI Dual Link input of a monitor or projector. Its main function is to convert the optical signal arriving via fiber optic cable back into an electrical signal, ensuring the display can receive and correctly display the video content. This conversion process typically involves using an SP1401RX module, which is responsible for converting the received optical signal back into a TMDS signal. The first and second DVI Dual Link optical transceivers are connected via fiber optic cable, allowing for long-distance transmission of optical signals between the two devices. The use of fiber optic cable significantly improves signal transmission distance and interference immunity, offering superior performance compared to traditional copper wire transmission. The signal generated at the video source end is first converted into an optical signal by the transmitting device and then transmitted via fiber optic cable to the receiving device. The receiving device converts the optical signal back into an electrical signal and sends these signals to the display end, thus completing the entire communication process.

[0096] The system consists of two DVI Dual Link optical transceivers and optical fibers, forming a complete end-to-end digital video transmission solution.

[0097] This configuration allows the video source and display to communicate over long distances while maintaining high definition and quality of the video signal.

[0098] This system is suitable for applications requiring long-distance, high-bandwidth video transmission, such as conference rooms, surveillance systems, digital signage, and multimedia displays. With this configuration, the DVI Dual Link optical transceiver system overcomes the transmission distance limitations of traditional copper wire DVI interfaces, providing a stable, reliable, and long-distance digital video transmission solution.

[0099] Specifically, refer to Figure 4In the solution provided in this application, the control chip of the internal optoelectronic signal converter of the first DVI Dual Link optical transceiver is used to: receive a +5V signal from the video source, and after acquiring the first signal, reply with an HPD signal to the video source, while providing a transparent I2C channel for the transparent transmission of EDID status reading commands; the internal optoelectronic signal converter of the first DVI Dual Link optical transceiver includes an SP1401TX module; the control chip of the internal optoelectronic signal converter of the second DVI Dual Link optical transceiver is used to send a +5V signal to the display, acquire the HPD signal returned by the display, and after acquiring the HPD signal, send a first command to the other connected DVI Dual Link optical transceiver, set its own I2C state to slave state, and wait for the video source to initiate an EDID status reading command; the internal optoelectronic signal converter of the second DVI Dual Link optical transceiver includes an SP1401RX module.

[0100] The specific implementation steps of the transmitting device (the first DVI Dual Link optical transceiver) are as follows:

[0101] The transmitting device determines whether it is connected to the video source by whether the MCU receives a +5V signal from the video source. If a +5V signal is received, it enters the second working state.

[0102] The MCU simulates an HPD signal from a display and sends it to the video source, which is used by the video source to detect whether it is connected to the display. If the video source receives the HPD signal, it enters the third step of the working state.

[0103] The video source initiates an EDID read command and transmits it through the DDC pass-through channel established by the MCU to the "electro-optical" conversion module, which then transmits it to the receiving device via optical fiber. If the correct display EDID is read, the process proceeds to step 4.

[0104] The video source outputs video data to the transmitting device. After receiving the video data, the transmitting device converts it into an optical signal using two built-in SP1401 modules, which is then transmitted to the receiving device via two optical fibers.

[0105] The specific operating steps of the receiving device (the second DVI Dual Link optical transceiver) are as follows:

[0106] After the receiver is powered on, the built-in MCU simulates a video source and outputs a +5V signal, which is transmitted to the monitor via a cable. Once the monitor receives the signal, it enters the second working state.

[0107] The display then outputs an HPD signal to the MCU of the receiving device. The MCU uses this signal to determine that the receiving device and the display are properly connected and can proceed to step 3.

[0108] The MCU sets the I2C of the analog DDC channel to slave mode and waits for a read command from the transmitting device. After receiving the read command, it starts reading the EDID of the display. After reading the correct display EDID, it enters the working state of step 4.

[0109] After receiving the optical signal, the receiving device recovers 7 channels of TMDS video signal using the two built-in SP1401RX modules, and transmits them to the monitor via ordinary cable, completing the 5000-meter long-distance transmission of the DVI Dual Link signal from the video source to the monitor.

[0110] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0111] It should be noted that in the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means at least two.

[0112] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0113] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A DVIDual Link optical transceiver, characterized in that, include: The DVIDualLink communication terminal is used to connect to the communication terminal of a preset first device to realize communication with the preset first device; A photoelectric signal converter, connected to the DVIDual Link terminal, is used to convert electrical signals into optical signals; The photoelectric signal converter is also used to connect to another DVIDual Link optical transceiver via optical fiber, so as to realize the transmission of signals between the two DVIDual Link optical transceivers; The other DVIDual Link optical transceiver is used to connect to the communication end of a preset second device; The first and second devices communicate via a DVIDual Link optical transceiver. The photoelectric signal converter includes: a control chip; The control chip receives a +5V signal from the video source and, after receiving the first signal, replies with an HPD signal to the video source. It also provides a transparent I2C channel for the pass-through of EDID status read commands; and / or, The control chip is used to send a +5V signal to the display, obtain the HPD signal returned by the display, and after obtaining the HPD signal, send a first instruction to another connected DVIDual Link optical transceiver to set its own I2C state to slave state and wait for the video source to initiate the EDID state read instruction.

2. The DVIDual Link optical transceiver according to claim 1, characterized in that, The photoelectric signal converter includes: a signal conversion module; The signal conversion module includes an SP1401TX module and / or an SP1401RX module; The SP1401TX module is used to convert TMDS signals into optical signals; The SP1401RX module is used to convert optical signals into TMDS signals.

3. The DVIDual Link optical transceiver according to claim 2, characterized in that, The photoelectric signal converter includes: The number of SP1401TX modules is at least two; or, The number of SP1401RX modules is at least two.

4. The DVIDual Link optical transceiver according to claim 1, characterized in that, The photoelectric signal converter includes a power supply module.

5. The DVIDual Link optical transceiver according to claim 4, characterized in that, The photoelectric signal converter includes: the power supply module includes a battery and / or a power supply interface.

6. The DVIDual Link optical transceiver according to claim 1, characterized in that, The DVIDual Link communication terminal is connected to the photoelectric signal converter via a cable.

7. The DVIDual Link optical transceiver according to claim 1, characterized in that, The DVIDual Link communication terminal is a DVIDual Link connector or a DVIDual Link interface.

8. A DVIDual Link optical transceiver system, characterized in that, include: The first DVIDual Link optical transceiver was used to connect to the communication interface of the video source. The second DVIDual Link optical transceiver is used to connect to the communication interface on the display end; The first DVIDual Link optical transceiver and the second DVIDual Link optical transceiver are connected by optical fiber; The video source communicates with the display via the DVIDual Link optical transceiver system. The first DVIDual Link optical transceiver and the second DVIDual Link optical transceiver are as described in claim 1.

9. The DVIDual Link optical transceiver system according to claim 8, characterized in that, include: The control chip of the first DVIDual Link optical transceiver's internal photoelectric signal converter is used to: receive the +5V signal from the video source, and after acquiring the first signal, reply with an HPD signal to the video source, while providing a transparent I2C channel for the transparent transmission of EDID status read commands; the first DVIDual Link optical transceiver's internal photoelectric signal converter includes: SP1401TX module; The control chip of the internal photoelectric signal converter of the second DVIDualLink optical transceiver is used to send a +5V signal to the display, obtain the HPD signal returned by the display, and after obtaining the HPD signal, send a first instruction to the other connected DVIDualLink optical transceiver to set its own I2C state to slave state and wait for the video source to initiate the EDID state read instruction; the internal photoelectric signal converter of the second DVIDualLink optical transceiver includes: SP1401RX module.

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