Optical fiber signal transmission cable and optical fiber signal sending and receiving equipment

Abstract

The utility model discloses an optical fiber signal transmission cable. The optical fiber signal transmission cable comprises a cable comprising a plurality of optical fibers and a plurality of conductive wires, the two ends of the cable are connected with the first connector and the second connector respectively. The first connector comprises a first plug which is provided with a first group of pins and a second group of pins; a first optical transceiver electrically coupled to the first set of pins, optically coupled to a first end of an optical fiber of the cable; and one end of the first isolation transformation circuit is electrically coupled with the second group of pins, and the other end of the first isolation transformation circuit is electrically coupled with the first end of the conductive wire of the cable. The second connector comprises a second plug which is provided with a first group of pins and a second group of pins; a second optical transceiver electrically coupled to the second set of pins, optically coupled to a second end of the optical fiber of the cable; and one end of the second isolation transformation circuit is electrically coupled with the second group of pins of the second plug, and the other end of the second isolation transformation circuit is electrically coupled with the second end of the conductive wire of the cable. The optical fiber signal transmission distance is prolonged, and the signal transmission quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of signal transmission of optical fiber cables, in particular to an optical fiber signal transmission cable, and an optical fiber signal sending and receiving device. Background Art

[0002] Existing fiber optic cables are usually composed of multiple optical fibers and metal conductors such as copper wire (or tinned copper). Optical fibers are used to transmit high-speed data, and metal conductors are used to transmit low-speed signals, such as the clock signal (SCL) and data signal (SDA) of the HDMI interface, the hot plug signal (HPD) and the device control signal (CEC) and other pin signals.

[0003] Fiber optic cables are widely used for data transmission due to their high bandwidth and long transmission distances. However, due to the physical structure of fiber optic cables, low-speed signals are transmitted via metal conductors, which are inevitably affected by distance. Existing interfaces for low-speed signals directly connect to the metal conductors of the transmission cable. This causes the low-speed signal to attenuate as the transmission cable length increases, thus affecting signal transmission quality.

[0004] Fiber optic cables can be used to transmit video, audio, and other signals between video sources (such as video players, video signal switchers, and computers) and display devices (such as digital televisions and monitors). Electronic devices are typically equipped with ports for data communication that typically comply with various industry standards, such as USB (Universal Serial Bus), HDMI (High-Definition Multimedia Interface), DP (DisplayPort), and DVI (Digital Visual Interface). As the distance between the video source and the display device increases, the length of the metal conductors within the fiber optic cable increases, resulting in an increase in the capacitance of the metal conductors. This can exceed the specified capacitance parameters for the port and affect signal transmission quality. Utility Model Content

[0005] The utility model provides an optical fiber signal transmission cable and an optical fiber signal sending and receiving device, which improve the signal quality of low-speed signals of the optical fiber cable.

[0006] In a first aspect, the present invention provides an optical fiber signal transmission cable, comprising:

[0007] a cable comprising a plurality of optical fibers and a plurality of conductive wires;

[0008] The first end of the cable is connected to a first connector, and the first connector includes:

[0009] a first plug having a first set of pins and a second set of pins;

[0010] a first optical transceiver electrically coupled to the first set of pins and optically coupled to a first end of an optical fiber of the cable;

[0011] a first isolation transformer circuit, one end of which is electrically coupled to the second group of pins, and the other end of which is electrically coupled to the first end of the conductive wire of the cable;

[0012] The second end of the cable is connected to a second connector, and the second connector includes:

[0013] a second plug having a first set of pins and a second set of pins;

[0014] a second optical transceiver electrically coupled to the second set of pins and optically coupled to a second end of the optical fiber of the cable;

[0015] The second isolation transformer circuit has one end electrically coupled to the second group of pins of the second plug, and the other end electrically coupled to the second end of the conductive wire of the cable.

[0016] Optionally, the first isolation transformer circuit is a processor configured to convert the signals of the second group of pins of the first plug separately or selectively into differential data packets for transmission.

[0017] Furthermore, the second isolation transformer circuit is a processor configured to restore the capacitance increment affected by the distance of the cable conductive line.

[0018] Specifically, a first group of pins of the first plug and the second plug are ultra-high-speed signal pins, and a second group of pins of the first plug and the second plug are non-ultra-high-speed signal pins.

[0019] Furthermore, the first plug or the second plug is an HDMI interface, a DVI interface or a DP interface.

[0020] In a second aspect, the present invention provides a sending device, comprising:

[0021] a plug configured as a first connector for connecting to a fiber optic cable, the plug having a first set of pins and a second set of pins, the first set of pins being used to couple a plurality of optical fibers of the fiber optic cable, the second set of pins being used to electrically couple a plurality of conductive wires of the fiber optic cable;

[0022] The first isolation transformer circuit is configured to be set inside the transmitting device and electrically coupled to the second group of pins of the plug, and is used to receive a signal from the control circuit of the transmitting device, process the received signal, and send it out from the second group of pins of the plug to multiple electrical conductors of the cable.

[0023] Furthermore, the first isolation transformer circuit is a processor configured to convert the signals of the second group of pins of the first plug into differential data packets for transmission separately or selectively.

[0024] In a third aspect, the present invention provides a receiving device, comprising:

[0025] a plug configured to connect to a second connector of the optical fiber cable, the plug having a first set of pins and a second set of pins, the first set of pins being used to couple a plurality of optical fibers of the optical fiber cable, the second set of pins being used to connect a plurality of conductive wires of the optical fiber cable;

[0026] The second isolation transformer circuit is configured to be set inside the receiving device and electrically coupled to the second group of pins of the plug, and is used to receive signals from the conductive wires of the optical fiber cable, process the received signals and send them to the control circuit of the receiving device through the second group of pins of the plug.

[0027] Preferably, the signal of the conductive line of the optical fiber cable is a differential data packet; and the second isolation transformer circuit is a processor configured to restore the received differential data packet.

[0028] Furthermore, the second isolation transformer circuit is a processor configured to restore the capacitance increment affected by the distance of the cable conductive line.

[0029] Beneficial effects

[0030] Compared to traditional fiber optic cables, this utility model installs an isolation transformer circuit within the fiber optic cable connector, between the low-speed signal pins and the cable's conductive wires. This allows the capacitance increment at both ends of the cable to be adjusted and compensated to standard parameters due to the influence of cable distance, thereby extending the signal transmission distance. The isolation transformer circuit is further used to process the low-speed signal pins of the connector for the processor itself, recording the pin status and converting it into differential data packets through encoding. This eliminates common-mode noise in the environment, improves the anti-interference capability during signal transmission, and thus provides high signal transmission quality and extends the signal transmission distance. By converting the low-speed signal encoding into differential data packets, the transmission structure of the low-speed signal is changed, saving wire material. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural diagram of an HDMI optical fiber signal transmission cable according to embodiment 1 of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of a video signal transmission system using an HDMI optical fiber signal transmission cable according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic structural diagram of a Type A HDMI interface connector provided by an embodiment of the present utility model;

[0034] Figure 4 It is a schematic diagram of the connection structure between the optical fiber cable and the connector lead provided by an embodiment of the present utility model. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] See also Figure 1 , is a schematic diagram of the structure of an HDMI fiber optic signal transmission cable according to Example 1 of the present invention. The cable 30 comprises a single cable having multiple optical fibers and multiple conductive wires, with a first connector 31 and a second connector 32 connected at each end. The conductive wires are copper or tinned copper conductors. A transmitter 10 (such as a television, monitor, digital video recorder, or set-top box) serving as a signal source is connected to the first connector 31, while a receiver 20 (such as a digital television, monitor, or the like) serving as a receiving end is connected to the second connector 32.

[0037] See also Figure 3 , is a structural diagram of the first connector of the present invention. The first connector includes a type A HDMI interface, a laser transceiver, and a first isolation transformer circuit. The type A HDMI interface has a first group of pins and a second group of pins, and the first group of pins mainly includes a data channel and a clock signal. The second group of pins of the type A HDMI interface is a low-speed signal, specifically pin 13 is CEC device control, pin 14 is ARC or EARC+ audio return channel, pin 15 is SCL clock signal, pin 16 is SDA serial data input / output line, pin 17 is ground, pin 18 is 5V power line, and pin 19 is HPD hot plug. Among them, the permitted capacitance of 13-pin CEC, 15-pin SCL, and 16-pin SDA in the HDMI interface industry standard is less than 700PF. The structure of the second connector is the same as that of the first connector.

[0038] As the length of the optical fiber cable increases, the actual capacitance of the above-mentioned pins of the HDMI interface will increase, thus exceeding 700PF, which does not meet the standard, and the signal quality transmitted on this pin is poor. To solve this problem, the second group of pins of the HDMI interface of the first connector is connected to a first isolation transformer circuit, which electrically couples one end of the multiple electrical conductors of the cable; the other end of the multiple electrical conductors of the cable is electrically coupled to a second isolation transformer circuit, and the second isolation transformer circuit is connected to the second group of pins of the HDMI interface of the second connector. The second isolation transformer circuit is equivalent to an isolation transformer, which restores and adjusts the capacitance increment affected by the distance of the cable copper wire, so that the pin capacitance of the HDMI interface of the second connector reaches less than 700PF, which meets industrial standards and ensures signal transmission quality.

[0039] The first group of pins of the HDMI interface is connected to the laser transceiver 311, which converts the differential data of the video signal into optical signals through electro-optical conversion and transmits them at ultra-high speed on multiple optical fibers of the cable.

[0040] In Example 2, the first isolation transformer circuit is the processor 312, and the second isolation transformer circuit is the processor 322. Both have the function of isolation transformers, thereby restoring the capacitance increment affected by the distance of the cable copper wire, improving the signal transmission quality, and extending the signal transmission distance.

[0041] Processor 312 can record the signal states of all second-group pins of the first connector and convert them into differential data packets through encoding. Alternatively, it can record the signal states of a specific second-group pin, such as the signal states of pin 13 CEC, pin 15 SCL, and pin 16 SDA, and convert them into differential data packets through encoding for transmission to the copper wires of the cable. The encoding method is not limited. This solution can eliminate common-mode noise in the environment and improve the anti-interference capability during signal transmission, thereby providing high signal transmission quality. Processor 322 of the second connector restores the low-speed signal of the differential data packets received by the cable.

[0042] Specifically, the 7 low-speed signals of the second group of pins of the first connector 31 are encoded into differential data packets and transmitted through 2 designated copper wires. Optionally, the 7 low-speed signals of the second group of pins are encoded into two differential data packets, each of which is transmitted through 2 copper wires, that is, 4 copper wires are used for transmission, wherein the pin signals of the specific 7 low-speed signals are allocated to the two differential data packets and can be freely defined. Compared with the traditional optical fiber signal transmission, the low-speed signals of the signal are all transmitted by 7 copper wires, which improves the signal transmission quality while saving wires. The number of low-speed signals received by the second connector 32 is adapted to the number of copper wires of the optical fiber cable and the number of low-speed signals sent by the first connector 31.

[0043] In Example 3, a fiber optic signal transmission device 10 (such as a television, monitor, digital video recorder, or set-top box) includes an output HDMI interface 11 and a first processor. The output HDMI interface has a first set of pins and a second set of pins. The output HDMI interface is configured to connect to the first connector of a conventional fiber optic cable. Signals from the first set of pins pass through an electro-optical conversion circuit (not shown) in the first connector of the conventional fiber optic cable and are then transmitted by a laser transceiver to the multiple optical fibers of the cable.

[0044] The first processor is configured to be disposed within the transmitting device and electrically coupled to the second set of pins of the output HDMI interface. The processor is configured to receive signals from the transmitting device control circuitry and first process the received signals, which are then outputted from the second set of pins of the output HDMI interface to the multiple optical fibers of the cable. Because the second set of low-speed signal pins of the first connector of a conventional optical fiber cable are directly connected to the multiple copper conductors of the cable, the processor still acts as an isolation transformer in the overall system connecting the conventional optical fiber cable and the transmitting device, restoring the capacitance increment affected by the distance of the cable's copper conductors, thereby compensating for the signal transmission distance.

[0045] The first processor can record the signal states of all second-group pins of the first connector and convert them into differential data packets through encoding. Alternatively, the first processor can record the signal states of a specific second-group pin, such as the signal states of pin 13 CEC, pin 15 SCL, and pin 16 SDA, and convert them into differential data packets through encoding for transmission to the copper wires of the cable. The encoding method is not limited. This solution can eliminate common-mode noise in the environment, improve anti-interference capabilities during signal transmission, and thus provide high signal transmission quality.

[0046] Based on Example 3, the difference between Example 4 and Example 3 is that the output HDMI interface 11 is configured as a first connector for connecting an optical fiber cable, and the number of copper wires of the optical fiber cable is adapted to the number of output signals of the second group of leads of the output HDMI interface.

[0047] Specifically, the seven low-speed signals output from the second set of pins of the HDMI interface 11 are encoded into differential data packets and transmitted over two designated copper wires. Optionally, the seven low-speed signals from the second set of pins are encoded into two differential data packets, each of which is transmitted over two copper wires, i.e., four copper wires are used for transmission. The specific allocation of the seven low-speed signals to the two differential data packets can be freely defined. Compared to traditional fiber optic signal transmission, where low-speed signals are transmitted over seven copper wires, this embodiment improves signal transmission quality while saving wires.

[0048] In Example 5, a fiber-optic signal receiving device (such as a digital television or monitor) includes an input HDMI interface 21 and a second processor. The input HDMI interface has a first set of pins and a second set of pins. The input HDMI interface is configured to connect to a second connector of a conventional fiber-optic cable. The conventional fiber-optic cable second connector transmits the received ultra-high-speed data signal through an optoelectronic conversion circuit (not shown) and then a laser transceiver transmits the signal to the first set of pins of the input HDMI interface.

[0049] The second processor is configured to be disposed within the receiving device and electrically coupled to the second set of pins of the input HDMI interface. The processor is configured to receive signals from the conductive wires of the optical fiber cable, process the received signals, and transmit the received signals to the control circuit of the receiving device via the second set of pins of the input HDMI interface. Because the second set of low-speed signal pins of the second connector of a conventional optical fiber cable are directly connected to the multiple copper conductors of the cable, the second processor still acts as an isolation transformer in the overall system connecting the conventional optical fiber cable and the receiving device, restoring the capacitance increase affected by the distance of the cable's copper wires, thereby compensating for the signal transmission distance.

[0050] The second processor decodes and restores the differential data packets received at the second group of pins of the input HDMI interface.

[0051] Based on Example 5, the difference between Example 6 and Example 5 is that the input HDMI interface 21 is configured as a second connector for connecting an optical fiber cable, and the number of copper wires of the optical fiber cable is adapted to the number of input signals of the second group of leads of the input HDMI interface 21.

[0052] Specifically, the second set of pins inputting the HDMI interface 21 receives differential data packets via two copper wires, which the second processor decodes and restores into seven low-speed signals. Alternatively, the second set of pins inputting the HDMI interface 21 receives two differential data packets via four copper wires, which the second processor decodes and restores into seven low-speed signals. Compared to traditional fiber optic signal transmission, where low-speed signals are transmitted over seven copper wires, this embodiment improves signal transmission quality while saving wires.

[0053] The HDMI interface in the above embodiment can be replaced by a DVI interface or a DP interface.

[0054] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. Optical fiber signal transmission cable, characterized in that: include: a cable comprising a plurality of optical fibers and a plurality of conductive wires; The first end of the cable is connected to a first connector, and the first connector includes: a first plug having a first set of pins and a second set of pins; a first optical transceiver electrically coupled to the first set of pins and optically coupled to a first end of an optical fiber of the cable; a first isolation transformer circuit, one end of which is electrically coupled to the second group of pins, and the other end of which is electrically coupled to the first end of the conductive wire of the cable; The second end of the cable is connected to a second connector, and the second connector includes: a second plug having a first set of pins and a second set of pins; a second optical transceiver electrically coupled to the second set of pins and optically coupled to a second end of the optical fiber of the cable; The second isolation transformer circuit has one end electrically coupled to the second group of pins of the second plug, and the other end electrically coupled to the second end of the conductive wire of the cable.

2. The optical fiber signal transmission cable according to claim 1, wherein: The first isolation transformer circuit is a processor configured to convert the signals of the second group of pins of the first plug into differential data packets for transmission respectively or selectively.

3. The optical fiber signal transmission cable according to claim 1, wherein: The second isolation transformer circuit is a processor configured to restore the capacitance increment affected by the distance of the cable conductive line.

4. The optical fiber signal transmission cable according to claim 1, wherein: The first group of pins of the first plug and the second plug are ultra-high-speed signal pins, and the second group of pins of the first plug and the second plug are non-ultra-high-speed signal pins.

5. The optical fiber signal transmission cable according to claim 1, wherein: The first plug or the second plug is an HDMI interface, a DVI interface or a DP interface.

6. Optical fiber signal transmission equipment, characterized in that: include: a plug configured as a first connector for connecting to a fiber optic cable, the plug having a first set of pins and a second set of pins, the first set of pins being used to couple a plurality of optical fibers of the fiber optic cable, the second set of pins being used to electrically couple a plurality of conductive wires of the fiber optic cable; The first isolation transformer circuit is configured to be set inside the transmitting device and electrically coupled to the second group of pins of the plug, so as to receive a signal from the control circuit of the transmitting device, process the received signal and send it out from the second group of pins of the plug to multiple conductive lines of the cable.

7. The transmitting device according to claim 6, wherein The first isolation transformer circuit is a processor configured to convert the signals of the second group of pins of the first plug into differential data packets for transmission respectively or selectively.

8. Optical fiber signal receiving device, characterized in that: include: a plug configured to connect to a second connector of the optical fiber cable, the plug having a first set of pins and a second set of pins, the first set of pins being used to couple a plurality of optical fibers of the optical fiber cable, the second set of pins being used to connect a plurality of conductive wires of the optical fiber cable; The second isolation transformer circuit is configured to be set inside the receiving device and electrically coupled to the second group of pins of the plug, and is used to receive signals from the conductive wires of the optical fiber cable, process the received signals and send them to the control circuit of the receiving device through the second group of pins of the plug.

9. The receiving device according to claim 8, wherein The signal of the conductive line of the optical fiber cable is a differential data packet; the second isolation transformer circuit is a processor configured to restore the received differential data packet.

10. The receiving device according to claim 8, wherein The second isolation transformer circuit is a processor configured to restore the capacitance increment affected by the distance of the cable conductive line.

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