CN117792499A

CN117792499A - Repeater with Y-Cable and signal transmission system thereof

Info

Publication number: CN117792499A
Application number: CN202311843231.4A
Authority: CN
Inventors: 马燕; 江辉; 周新亮
Original assignee: Everpro Technologies Wuhan Co Ltd
Current assignee: Everpro Technologies Wuhan Co Ltd
Priority date: 2023-07-28
Filing date: 2023-12-27
Publication date: 2024-03-29
Also published as: CN116980564A; CN117793274A

Abstract

The disclosure discloses a repeater with a Y-Cable and a signal transmission system thereof. The transmission system comprises an active optical cable and a repeater, wherein the active optical cable is used for transmitting signals between a source end and a destination end, the active optical cable comprises a transmitting end, an optical cable and a receiving end, the transmitting end is used for connecting the source end, the receiving end is used for connecting the destination end, and the receiving end is connected with the repeater; the repeater is respectively connected with the receiving end and the destination end and forwards the electric signal from the receiving end to the destination end; the repeater comprises a voltage input end and a voltage output end; the voltage input end is used for receiving a voltage signal from outside the active optical cable; the repeater is used for outputting the voltage signal received by the voltage input end to the voltage output end; the voltage output terminal is used for providing a voltage signal to the destination terminal. According to the embodiment of the disclosure, a 5V voltage signal can be provided for the power input pin of the interface for receiving the multimedia signal in the display device, so that the display device is awakened from the sleep mode, and the problem of power supply compatibility in the transmission process of the multimedia signal is effectively solved.

Description

Repeater with Y-Cable and signal transmission system thereof

Technical Field

The present disclosure relates generally to the field of communication technology. More particularly, the present disclosure relates to a Y-Cable equipped repeater and a signal transmission system thereof.

Background

With the development of technology and the improvement of living standard of people, the demand for obtaining high-definition video signals is increasing. Based on this, an audio-video transmission protocol such as DVI (Digita lVisua lInterface, digital video interface), HDMI (High Definition Multimedia Interface ) and the like for communication between a video source and a display device is sequentially presented.

The audio and video transmission process between the video source and the display device comprises transmission of high-speed signals and transmission of low-speed signals. Specifically, early technology high-speed signals, i.e., video signals, can be transmitted by means of copper cables or optical fibers, so that the transmission rate is increased and the loss is reduced. However, the transmission of low-speed signals such as an HPD (Hot Plug Detect) signal, an SCL (serial clock) signal, an SDA (serial lData) signal, and a CEC (Consumer Electronics Control) signal still has various problems. Then, a low-speed signal photoelectric transmission technology appears, and the connection between a transmitting end connected with a video source and a receiving end connected with display equipment through a pure light AOC (ActiveOptica lCables, active optical cable) is realized. The technology can mutually convert a low-speed signal and a low-voltage differential signal at a transmitting end, then carry out photoelectric conversion, transmit the low-speed signal and the low-voltage differential signal to a receiving end in a pure optical AOC cable in an optical signal mode, and transmit the optical signal into an electric signal at the receiving end in a penetrating way to display equipment. The chinese patent application No. 2023109560671 provides a pure optical active cable.

In application, in order to improve the overall transmission length of the Cable, the pure light AOC Cable does not transmit power supply signals, and power supply of the high-speed signal photoelectric transmission module and the low-speed signal photoelectric transmission module at the receiving end is usually performed by adopting a Y-Cable (i.e. Y-type Cable) mode to take power from a USB port or other power supply interfaces of the display device. However, the use of the Y-Cable brings great inconvenience to the application of the Cable, and has limitation to the application of the pure optical AOC Cable in an environment where the display device does not provide a power supply interface such as USB.

In the chinese patent application No. 2023109560671, a pure optical active cable obtains power from a high-speed signal line connected to a display device, and is used for supplying power to components of a receiving end of the pure optical active cable.

However, for a display device supporting the Non-Link Recoverable Off state, in the sleep state, if the power input Pin (Pin) of the HDMI interface does not acquire the 5V voltage signal, the display device is always in the sleep state and cannot be awakened from the sleep state, so that a problem of compatibility may occur that the display device cannot be lightened after the pure light active optical cable is connected.

In view of this, it is needed to provide a scheme for signal transmission, so as to solve the compatibility problem of the multimedia signal transmission process and the display device supporting Non-Link Recoverable Off state in various application scenarios such as plugging, dormancy and awakening.

Disclosure of Invention

To address at least one or more of the technical problems mentioned above, the present disclosure proposes, among other things, a solution applied to signal transmission.

In a first aspect, the present disclosure provides a receiving end comprising: the first high-speed signal photoelectric transmission module and the first low-speed signal photoelectric transmission module; the power supply port of the first high-speed signal photoelectric transmission module is connected with the high-speed signal line of the receiving end, and the power supply port of the first low-speed signal photoelectric transmission module is connected with the high-speed signal line.

In a specific embodiment of the disclosure, the receiving end further includes: a power switch and a controller; the power supply port of the first low-speed signal photoelectric transmission module is connected with the high-speed signal line through the power switch; the controller is used for controlling the on-off of the power switch.

In a specific embodiment of the disclosure, the controller in the receiving end controls on-off of the power switch, where the power switch controls on-off of the power supply port of the first low-speed signal photoelectric transmission module and the high-speed signal line, and when or before the receiving end is connected to the destination end, the power switch ensures that the power supply port of the first low-speed signal photoelectric transmission module is disconnected from the high-speed signal line, so that at the moment of connection to the destination end, although the first high-speed signal photoelectric transmission module is in a power supply state, the first low-speed signal photoelectric transmission module is in a power-off state, and output current impact of the connection moment to the destination end can be reduced.

In a second aspect, the present disclosure provides an active optical cable comprising a receiving end, an optical fiber, and a transmitting end; the receiving end comprises: the first high-speed signal photoelectric transmission module and the first low-speed signal photoelectric transmission module; the power supply port of the first high-speed signal photoelectric transmission module is connected with the high-speed signal line of the receiving end, and the power supply port of the first low-speed signal photoelectric transmission module is connected with the high-speed signal line of the receiving end; the transmitting end comprises: the second high-speed signal photoelectric transmission module and the second low-speed signal photoelectric transmission module; the second high-speed signal photoelectric transmission module is connected with the first high-speed signal photoelectric transmission module through the optical fiber, and the second low-speed signal photoelectric transmission module is connected with the first low-speed signal photoelectric transmission module through the optical fiber.

In a third aspect, the present disclosure provides a transmission system comprising an active optical cable and a repeater for transmitting signals between a source and a destination; the active optical cable includes: the optical cable comprises a transmitting end, an optical cable and a receiving end, wherein the transmitting end is used for connecting the source end, and the receiving end is used for connecting the destination end; the receiving end is connected with the repeater; the relay is respectively connected with the receiving end and the destination end to replace the receiving end to be connected with the destination end and transmit the electric signal from the receiving end to the destination end; the repeater includes: a voltage input terminal and a voltage output terminal; the voltage input end is used for receiving a voltage signal from outside the active optical cable; the repeater is used for outputting the voltage signal received by the voltage input end to the voltage output end; the voltage output terminal is used for providing a voltage signal for the destination terminal.

In one embodiment of the present disclosure, the repeater includes an HDMI connector, a USB connector, and a high-speed signal line; the HDMI connector is used for connecting the destination end, the voltage output end is a power output pin of the HDMI connector, and the voltage input end is connected with the USB connector; the high-speed signal line of the repeater is used for connecting the high-speed signal line of the receiving end.

In one embodiment of the disclosure, the receiving end includes a high-speed signal line, a first high-speed signal optoelectronic transmission module, and a first low-speed signal optoelectronic transmission module; the power supply port of the first high-speed signal photoelectric transmission module is connected with the high-speed signal line of the receiving end; and a power supply port of the first low-speed signal photoelectric transmission module is connected with a high-speed signal line of the receiving end. According to some embodiments of the present application, the receiving end includes a power switch; the power supply port of the first low-speed signal photoelectric transmission module is connected with the high-speed signal line of the receiving end through the power switch; the power switch is closed in response to power being obtained from the high-speed signal line of the receiving end; responding to the fact that the first high-speed signal photoelectric transmission module does not receive optical signals for a long time, and switching off the power switch, wherein the first high-speed signal photoelectric transmission module enters a standby state; and the power switch is closed in response to the first high-speed signal photoelectric transmission module changing from a standby state to normal operation.

In one embodiment of the disclosure, the repeater includes: an HDMI female connector, an HDMI male connector and a Y-Cable Cable; the HDMI female connector is used for connecting the receiving end; the HDMI male connector is used for connecting the destination end; the Y-Cable Cable comprises a first connector; the voltage input end is a power input pin of the first connector; the first voltage output end is a power output pin of the HDMI male connector; and a power input pin of the first connector is connected with a power output pin of the HDMI male connector through the Y-Cable.

In one embodiment of the disclosure, the power input pin of the HDMI female connector is disconnected from the power output pin of the HDMI male connector.

In one embodiment of the disclosure, the repeater further comprises: a switch; the first input end of the switch is connected with the power input pin of the HDMI female connector, the second input end of the switch is connected with the power input end, and the output end of the switch is connected with the power output pin of the HDMI male connector; the switch is used for connecting one of a power input pin and a power input end of the HDMI female connector to a power output pin of the HDMI male connector.

In one embodiment of the disclosure, the repeater further comprises: a voltage conversion circuit; an input end of the voltage conversion circuit receives a voltage signal from the voltage input end, and an output end of the voltage conversion circuit is connected to a high-speed signal line of the repeater.

In one embodiment of the disclosure, the repeater further comprises a signal processing chip; the signal processing chip is used for enhancing high-speed signals and/or low-speed signals from the receiving end.

In a fourth aspect, the present disclosure provides a repeater; the repeater is used for connecting a receiving end and a destination end of the active optical cable and forwarding an electric signal from the receiving end to the destination end, wherein the active optical cable is used for connecting the source end and the destination end; the active optical cable comprises a transmitting end and a receiving end, wherein the transmitting end is used for connecting the source end, and the receiving end is used for connecting the destination end; the repeater includes: a voltage input terminal and a voltage output terminal; the voltage input end is used for receiving a voltage signal from outside the active optical cable; the repeater is used for outputting the voltage signal received by the voltage input end to the voltage output end; the voltage output terminal is used for providing a voltage signal for the destination terminal.

In some embodiments, the repeater includes an HDMI connector for connecting to the signal receiving terminal, the first voltage output terminal is a power output pin of the HDMI connector, and the voltage input terminal includes the first connector.

In some embodiments, the repeater further comprises a high-speed signal line for connecting to a high-speed signal line of the signal transmitting terminal.

In some embodiments, the repeater includes a second connector for connecting to the signal transmitting terminal, the second connector being connected to a high-speed signal line, the high-speed signal line being connected to the high-speed signal line of the signal transmitting terminal through the second connector; the second connector is connected with the first connector, and the first connector outputs the received voltage signal to the second connector.

In some embodiments, the repeater further comprises: a signal processing chip; the signal processing chip is used for forwarding the high-speed signal and/or the low-speed signal from the signal transmitting end to the signal receiving end.

In some embodiments, the signal processing chip is connected to a first connector that outputs the received voltage signal to the signal processing chip.

In some embodiments, the power input pin of the first connector is connected with the power output pin of the HDMI connector.

In some embodiments, the repeater further comprises: a voltage conversion circuit; the input end of the voltage conversion circuit is used for receiving a voltage signal, and the output end of the voltage conversion circuit is connected to the high-speed signal line through the magnetic beads.

In some embodiments, the repeater further comprises: the controller is connected with the switch, the output end of the controller is connected with the control end of the switch, one input end of the switch is connected with the power input pin of the first connector, and the output end of the switch is connected with the power output pin of the HDMI connector; the controller is used for controlling the switch to be closed or opened, and specifically comprises: the controller controls the switch to be turned on or off in response to the second connector receiving a signal from the signal transmitting end.

In some embodiments, the repeater further comprises a switching circuit, the second connector further comprises a voltage input pin, a first input end of the switching circuit is connected with the voltage input pin of the second connector, a second input end of the switching circuit is connected with a power input pin of the first connector, and an output end of the switching circuit is connected with a power output pin of the HDMI connector; responding to the voltage signal of the voltage input pin of the second connector to be smaller than a first threshold value, and connecting a second input end of the switch circuit with an output end of the switch circuit by the switch circuit; the switching circuit connects the first input terminal of the switching circuit with the output terminal of the switching circuit in response to the voltage signal of the voltage input pin of the second connector being greater than or equal to the first threshold.

In some embodiments, the repeater includes: an HDMI female connector, an HDMI male connector and a Y-Cable Cable; the HDMI female connector is used for connecting a signal transmitting end; the HDMI male connector is used for connecting a signal receiving end; the Y-Cable Cable includes a first connector; the voltage input end is a power input pin of the first connector; the first voltage output end is a power output pin of the HDMI male connector; the power input pin of the first connector is connected with the power output pin of the HDMI male connector through a Y-Cable.

In some embodiments, the power input pin of the HDMI female connector is not connected to the power output pin of the HDMI male connector.

In some embodiments, the power supply interface of the first high-speed signal optoelectronic transmission module is connected to the high-speed signal line of the receiving end, and the power supply interface of the first low-speed signal optoelectronic transmission module is connected to the second voltage output end of the repeater, and the repeater is configured to: in response to the repeater receiving the voltage signal, the repeater transmits the voltage signal to the high-speed signal line; responding to the high-speed electric signal received by the first high-speed signal photoelectric transmission module, and acquiring a power supply signal from a high-speed signal wire of the receiving end plug by the first high-speed signal photoelectric transmission module; and responding to the first low-speed signal photoelectric transmission module to receive the low-speed electric signal, and acquiring a power supply signal from the second voltage output end by the first low-speed signal photoelectric transmission module.

In some embodiments, the high-speed signal line of the repeater is connected with the high-speed signal line of the receiving end plug, the low-speed signal line of the repeater is connected with the low-speed signal line of the receiving end plug, and the first high-speed signal photoelectric transmission module is used for converting the received high-speed optical signal into a first high-speed electric signal and transmitting the first high-speed electric signal to the signal receiving end through the receiving end plug and the high-speed signal line of the repeater; the first low-speed signal photoelectric transmission module is used for converting a received low-speed optical signal into a first low-speed electric signal and transmitting the first low-speed electric signal to the signal receiving end through a low-speed signal wire of the receiving end plug and the repeater.

Through the transmission system or the repeater provided by the embodiment of the disclosure, the voltage signal from the outside of the pure light AOC cable can be obtained from the voltage input end of the repeater and transmitted to the display device through the voltage output end of the repeater, so that a 5V voltage signal is provided for the power input pin of the interface for receiving the multimedia signal in the display device, and the display device is further lightened so as to wake up the display device from the sleep mode, and the problem of power supply compatibility in the transmission process of the multimedia signal is effectively solved.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

fig. 1 shows a schematic structural diagram of a receiving end according to an embodiment of the disclosure;

FIG. 2 shows a flow diagram of a signaling process in accordance with an embodiment of the present disclosure;

FIG. 3 illustrates a flow diagram of a power control process according to an embodiment of the present disclosure;

FIG. 4 illustrates a flow diagram of a wake-up method in an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a pure optical active cable in an embodiment of the present disclosure;

FIG. 6 illustrates an exemplary block diagram of a transmission system in accordance with some embodiments of the present disclosure;

fig. 7 illustrates an exemplary block diagram of a transmission system of further embodiments of the present disclosure;

FIG. 8A illustrates an exemplary block diagram of a repeater of some embodiments of the present disclosure;

FIG. 8B illustrates an exemplary block diagram of a repeater of other embodiments of the present disclosure;

Fig. 9 shows an exemplary block diagram of a transmission system of a further embodiment of the present disclosure;

FIG. 10A illustrates an exemplary block diagram of a repeater of further embodiments of the present disclosure;

fig. 10B illustrates an exemplary block diagram of a repeater of further embodiments of the present disclosure.

Detailed Description

The following description of the embodiments of the present disclosure will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the disclosure. Based on the embodiments in this disclosure, all other embodiments that may be made by those skilled in the art without the inventive effort are within the scope of the present disclosure.

It should be understood that the terms "comprises" and "comprising," when used in this specification and the claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the present disclosure is for the purpose of describing particular embodiments only, and is not intended to be limiting of the disclosure. As used in the specification and claims of this disclosure, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the present disclosure and claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

As used in this specification and the claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a receiving end according to an embodiment of the disclosure. The receiving terminal 1 shown in fig. 1 is used for communicating with the display device 2 through a high-speed signal line and a low-speed signal line in a signal transmission process, and the receiving terminal 1 includes: a first high-speed signal photoelectric transmission module 11 and a first low-speed signal photoelectric transmission module 12. The power supply port a of the first high-speed signal photoelectric transmission module 11 is connected to the high-speed signal line of the receiving end 1, and the power supply port B of the first low-speed signal photoelectric transmission module 12 is connected to the high-speed signal line.

In signal transmission, the receiving end 1 performs photoelectric conversion on the high-speed optical signal and the low-speed optical signal transmitted by the pure optical active optical cable to which the receiving end belongs, and then transmits the high-speed optical signal and the low-speed optical signal to the display device 2. The high-speed optical signal in the pure optical active optical cable transmission is an optical signal obtained after the video signal is subjected to the electro-optical conversion, and the low-speed optical signal comprises an optical signal obtained after the HPD signal, the SCL signal, the SDA signal, the CEC signal, the EDID (Extended Display Identification Data, the extended display identification data) signal and the like are subjected to the electro-optical conversion. The first high-speed signal photoelectric transmission module 11 of the receiving end 1 converts the high-speed optical signal back into a video signal to be transmitted to the display device 2 when receiving the high-speed optical signal, and the first low-speed signal photoelectric transmission module 12 converts the low-speed optical signal back into signals such as an HPD signal, an SCL signal, an SDA signal, a CEC signal, an EDID signal and the like to be transmitted to the display device 2 when receiving the low-speed optical signal.

At the time of signal transmission, the high-speed signal line is connected to the terminating power source Avcc of the display device 2. In this embodiment, the terminating power supply is understood to be the terminal power supply voltage in the HDMI1.4 protocol, i.e. Termination Supply Voltage, which provides a minimum of 3.3V/80 mA.

Further, at the time of signal transmission, the specific connection manner of the high-speed signal line to the terminating power source Avcc of the display device 2 is as follows: the high-speed signal line is connected to a terminating power supply of the display device through two pull-up resistors R1 and R2, and the terminating power supply supplies power to the high-speed signal line. The values of the terminating power supply and the pull-up resistor may be set according to the requirements of the HDMI1.4 protocol, which is not limited by the embodiments of the present disclosure.

In the application, the display device 2 is presented as a display device such as a monitor.

In some embodiments, in order to suppress electromagnetic interference generated by the high-speed signal line pair power interface, the receiving end 1 may further include a noise suppression module. The power supply port A of the first high-speed signal photoelectric transmission module 11 is connected with the high-speed signal line through the noise suppression module and is used for suppressing high-frequency noise and peak interference on the high-speed signal line, and the influence on the integrity of the high-speed signal caused by power supply can be effectively filtered.

Further, the noise suppression module may be a magnetic bead. In other embodiments, the noise suppression module may also be an electronic device with a filter capacitor, a common mode inductor, etc. that suppresses high frequency noise and spike interference.

The receiving end 1 provided in the embodiment of the present disclosure has a first high-speed signal photoelectric transmission module 11 and a first low-speed signal photoelectric transmission module 12. The power supply port of the first high-speed signal photo-electric transmission module 11 is connected to the high-speed signal line of the receiving terminal 1, the power supply port of the first low-speed signal photo-electric transmission module 12 in the receiving terminal is connected to the high-speed signal line of the receiving terminal 1, and when the receiving terminal 1 is connected to the display device 2, the high-speed signal line of the receiving terminal 1 is connected to the terminating power supply of the display device 2. Therefore, when the receiving end is plugged into the destination end (the display device 2 in fig. 1), the first high-speed signal photoelectric transmission module 11 can obtain the electric power from the high-speed signal line, and the first low-speed signal photoelectric transmission module 12 obtains the electric power from the high-speed signal line, so that the first high-speed signal photoelectric transmission module 11 and the low-speed signal photoelectric transmission module 12 of the receiving end of the pure optical active optical Cable are powered by the termination power Avcc, the use of the Y-Cable by the receiving end of the pure optical active optical Cable can be eliminated, the device can be adapted to the environment that the display device 2 does not provide a power supply interface such as a USB, and the problem that the audio and video signals are transmitted in a long distance by using the pure optical active optical Cable and the display device is inconvenient to provide the power supply interface for the receiving end of the pure optical active optical Cable is effectively solved.

It should be noted that, the first high-speed signal photoelectric transmission module and the first low-speed signal photoelectric transmission module of the receiving end are powered by the termination power supply voltage Avcc of the high-speed signal line of the display device, so that the use of the Y-Cable at the receiving end can be eliminated. Such pure light active fiber optic cables may be applied to any other video source-display device combination, except for display devices that need to be provided with 5V in a sleep state to wake up.

Because the receiving end 1 is provided with the first high-speed signal photoelectric transmission module 11 and the first low-speed signal photoelectric transmission module 12, if both the two photoelectric transmission modules take power from the high-speed signal, under the condition that the display device is dormant or other power supplies are reduced, the power supply is possibly insufficient. In view of the above, some embodiments of the present disclosure provide a receiving end 1 further including: a power switch 13 and a controller 14 for controlling the power switch 13. The power supply port B of the first low-speed signal photoelectric transmission module 12 is connected to a high-speed signal line through a power switch 13.

Illustratively, as shown in fig. 1, the power supply port B of the first low-speed signal photoelectric transmission module 12 is connected to the electrical connection point vcm_rx on the high-speed signal line through the power switch 13. The power supply port a of the first high-speed signal optoelectronic transmission module 11 may be connected to the same electrical connection point vcm_rx on the high-speed signal line. When the contact of the power switch 13 is in communication with the electrical connection point vcm_rx, the first high-speed signal photo-electric transmission module 11 and the first low-speed signal photo-electric transmission module 12 in the receiving terminal 1 can be directly powered by the high-speed signal line. The power supply of the high-speed signal line to the first low-speed signal photoelectric transmission module 12 can be selectively cut off by the switch 13. Thus, the first high-speed signal photoelectric transmission module of the receiving terminal 1 can operate even if the power supply of the terminating power source Avcc is insufficient due to the sleep of the display device 2 or the like. And after the termination power Avcc of the display apparatus 2 is restored to the normal power supply capability, both the first high-speed signal photo-electric transmission module 11 and the first low-speed signal photo-electric transmission module 12 are simultaneously powered by closing the switch 13.

It will be appreciated that in some embodiments, the power supply port a of the first high-speed signal optoelectronic transmission module 11 may be connected to the electrical connection point vcm_rx on the high-speed signal line by the noise suppression module as described above, for example, by a magnetic bead connection, so as to suppress the influence of the high-speed signal line on the power supply interface.

Furthermore, it is understood that in other embodiments of the present disclosure, the power switch 13 and the power supply port a of the first high-speed signal optoelectronic transmission module 11 may also be connected to different electrical connection points on the high-speed signal line.

Further, a controller 14 for controlling on-off of the power switch 13 may be integrated in the first high-speed signal photoelectric transmission module 11. In other embodiments, the controller 14 may be independent of the first high-speed signal optoelectronic transmission module 11, but the integrated design is more compact. Specifically, in some embodiments, the controller 14 may control the on/off of the power switch 13 by using GPIO (Genera lPurpose InputOutput) to control the power on/off of the first low-speed signal photoelectric transmission module 12. However, the embodiments of the present disclosure are not limited thereto, and other ways of controlling the on/off of a switch that can be used in the prior art can also be applied to the embodiments of the present disclosure.

In order to realize the initialization of the first low-speed signal photoelectric transmission module 12 after power-up, in a specific embodiment of the present disclosure, any of the controllers 14 is further provided with a configuration interface connected to the first low-speed signal photoelectric transmission module 12, and the controller 14 is further configured to configure the first low-speed signal photoelectric transmission module 12 to work normally through the configuration interface, that is, to realize the initialization process of the first low-speed signal photoelectric transmission module 12. After the configuration is completed, the first low-speed signal photoelectric transmission module 12 is ready for performing low-speed signal photoelectric conversion and transmission, and can be used for receiving low-speed optical signals in the pure optical active optical cable, performing photoelectric conversion and other operations.

It should be noted that, in practical application, a controller may be configured for the first low-speed signal photoelectric transmission module 12 alone, so as to configure the first low-speed signal photoelectric transmission module 12 to work normally. And are not limited in this regard.

The present disclosure also provides a signal transmission method corresponding to any one of the foregoing receiving ends.

The method is applied to a receiving end 1 connected to one end of an optical fiber, the other end of which is connected to a transmitting end 4. The transmitting end 4 includes a second high-speed signal photoelectric transmission module 41 and a second low-speed signal photoelectric transmission module 42.

The following describes a signal transmission method according to an embodiment of the present disclosure.

Referring to fig. 2, fig. 2 shows a schematic flow chart of a signal transmission method according to an embodiment of the disclosure.

The signal transmission method provided by the embodiment of the disclosure is as follows:

in step S201, in response to the receiving terminal being plugged into the destination terminal, the first high-speed signal photoelectric transmission module acquires a power supply signal from the high-speed signal line.

Specifically, when the receiving terminal 1 is plugged into the display device 2, that is, when the high-speed signal line of the receiving terminal 1 is connected to the terminating power supply of the display device 2, the terminating power supply supplies power to the power supply port a of the first high-speed signal photoelectric transmission module 11 through the high-speed signal line.

In step S202, in response to the receiving terminal being plugged into the destination terminal, the first low-speed signal photoelectric transmission module obtains a power supply signal from the high-speed signal line.

In some embodiments, the power supply interface B of the first low-speed signal photoelectric transmission module 12 is connected to the high-speed signal line through the power switch 13. In this case, the first low-speed signal photoelectric transmission module 12 acquires the power supply signal from the high-speed signal line in response to the receiving terminal 1 being plugged into the destination terminal (the display device 2 in fig. 1) and the power switch 13 being in the closed state. Accordingly, the power supply to the first low-speed signal photoelectric transmission module 12 can be disconnected by disconnecting the power switch 13, and the energy consumption of the receiving end 1 is saved by switching off the power switch 13 under the condition that signal transmission is not required.

It should be noted that, although both the first high-speed signal photoelectric transmission module 11 and the first low-speed signal photoelectric transmission module 12 obtain power supply through the high-speed signal line at this time, if the first high-speed signal photoelectric transmission module 11 does not transmit the high-speed signal, but is in the standby mode, the power consumption required by the receiving end 1 is low at this time. In other words, the power supply mode at this time means that the first high-speed signal photoelectric transmission module 11 and the first low-speed signal photoelectric transmission module 12 are ready for power supply for video transmission between the video source 3 and the display device 2, and can be transmitted once there is a video transmission demand.

That is, the power consumption of the first high-speed signal photoelectric transmission module 11 and the first low-speed signal photoelectric transmission module 12 when video transmission is being performed is higher than the power consumption of the first high-speed signal photoelectric transmission module 11 and the first low-speed signal photoelectric transmission module 12 in the standby mode. The power supply condition of the receiving end 1 which is transmitting video is different from the power supply condition of the receiving end which is ready for power supply, and the power consumption required by the receiving end is distinguished.

It can be understood that through the optical signal communication of the transmitting end/the receiving end, the power-on and power-off sequence of the high-speed signal photoelectric transmission module and the low-speed signal photoelectric transmission module of the receiving end, the pure optical AOC cable can still work normally under various conditions such as plugging, dormancy, awakening and the like under the condition that the power supply of the termination power supply voltage Avcc of the high-speed signal line of the display device is insufficient.

It should be noted that the embodiment of the present disclosure is not strictly limited to the order of step S201 and step S202. In the actual signal transmission process, step S201 and step S202 may be performed in parallel or sequentially.

In step S203, in response to the low-speed optical signal, the first low-speed signal photoelectric transmission module converts the low-speed optical signal received from the optical fiber into a first low-speed electrical signal and transmits the first low-speed electrical signal to the destination.

The low-speed optical signal is obtained by converting the low-speed electrical signal of the video source 3 by the second low-speed signal photoelectric transmission module 42 of the transmitting end 4. The second low-speed signal photoelectric transmission module 42 transmits the low-speed optical signal to an optical fiber, and transmits the low-speed optical signal to the first low-speed signal photoelectric transmission module 12 through the optical fiber. The low-speed electrical signal of the video source 3 is the low-speed electrical signal received by the second low-speed signal photoelectric transmission module 42 from the source when the transmitting terminal 4 is plugged into the source terminal (the video source 3 in fig. 5).

The low-speed electric signal includes signals such as an HPD signal, an SCL signal, an SDA signal, a CEC signal, and an EDID signal.

In step S204, in response to the high-speed optical signal, the first high-speed signal photoelectric transmission module converts the high-speed optical signal received from the optical fiber into a first high-speed electrical signal and transmits the first high-speed electrical signal to the destination.

The high-speed optical signal is obtained by converting the high-speed electrical signal of the video source 3 by the second high-speed signal photoelectric transmission module 41 at the transmitting end, and the second high-speed signal photoelectric transmission module 41 transmits the high-speed optical signal to the optical fiber, and transmits the high-speed optical signal to the first high-speed signal photoelectric transmission module 11 through the optical fiber. The high-speed electrical signal of the video source 3 is received by the second high-speed signal photoelectric transmission module 41 from the source when the transmitting terminal 4 is plugged into the source.

It should be noted that, in the embodiment of the present disclosure, the timing of step S203 and step S204 is not strictly limited, and in the actual signal transmission process, step S203 and step S204 may be performed in parallel or sequentially.

The receiving end 1, the transmitting end 4, and the optical fiber according to the embodiment of the present application constitute the pure optical active optical cable (hereinafter may be simply referred to as pure optical AOC) described in the foregoing embodiments.

In one application scenario, the receiving end 1 of the pure light AOC is inserted into a display device. By closing the switch 13 the terminating power source Avcc of the display is caused to supply power to both the first high-speed signal electro-optical transmission module 11 and the second high-speed signal electro-optical transmission module 12. At this time, since the receiving terminal 1 has just been inserted into the display device 2 without normal high-speed signal transmission, the first high-speed signal electro-optical transmission module 11 is in the standby mode. Thus, even when the display device 2 is in the sleep mode at this time, insufficient power is supplied from the terminating power supply to operate the first high-speed signal electro-optical transmission module 11 in the standby mode. At this time, the first low-speed signal electro-optical transmission module 12 also operates. The power consumption of the first low-speed signal electro-optical transmission module 12 is lower than that of the first high-speed signal electro-optical transmission module 11. The terminating power source Avcc of the display device in the sleep state can simultaneously supply power to the first high-speed signal electro-optical transmission module 11 and the first low-speed signal electro-optical transmission module 12 in the standby mode.

After the cable is connected between the video source 3 and the display device 2, the video source performs low-speed signal transmission according to, for example, HDMI protocol, and the first low-speed signal electro-optical transmission module 12 receives a low-speed optical signal corresponding to the low-speed signal and sends the low-speed signal to the display device 2, where the low-speed signal wakes up the display device 2, so that the power supply capability of the terminating power source Avcc becomes strong, which is sufficient to support the normal operation of the first high-speed signal electro-optical transmission module 11 and the first low-speed signal electro-optical transmission module 12 at the same time. The video source 3 then transmits a high-speed signal, at which point the first high-speed signal electro-optical transmission module 11 is already sufficiently powered and receives the optical signal corresponding to the high-speed signal, and provides the high-speed signal to the display device 2 and illuminates the display device 2.

In some embodiments of the present disclosure, the power supply of the first low-speed signal photoelectric transmission module 12 in the receiving terminal 1 may be controlled by controlling the power switch 13. Specifically, during signal transmission, the controller 14 may control the power switch 13 to be closed, so that the first low-speed signal photoelectric transmission module 12 obtains a power supply signal from the high-speed signal line. Accordingly, during signal transmission, the controller 14 may also control the power switch 13 to be turned off, so that the high-speed signal line stops supplying power to the first low-speed signal optoelectronic transmission module 12.

The following description is directed to a power supply control process for a receiving end having a controller and a power switch.

Referring to fig. 3, fig. 3 shows a schematic diagram of a power supply control process according to an embodiment of the present disclosure.

In step S301, an optical signal idle flag of the first high-speed signal photoelectric transmission module is identified.

If the optical signal idle flag of the first high-speed signal optical-electrical transmission module 11 is in the active state, step S302 is executed, otherwise step S303 is executed.

In some embodiments, the optical signal idle flag of the first high-speed signal optical-electrical transmission module 11 is distinguished by 0 and 1: when the optical signal idle flag of the first high-speed signal optical-electrical transmission module 11 is in an active state, the optical signal idle flag is 1, which indicates that there is no transmission requirement of the high-speed optical signal currently, so that the power switch can be turned off to save the energy consumption of the receiving end. When the optical signal idle flag of the first high-speed signal optical-electrical transmission module 11 is in an invalid state, the optical signal idle flag is 0, which indicates that there is a need to transmit a high-speed optical signal currently, that is, the high-speed signal line is in a non-idle state, and power supply of the receiving end needs to be ensured, so that the controller controls the power switch to be turned on.

Further, the optical signal idle flag of the first high-speed signal optical-electrical transmission module 11 may be determined according to the following manner:

If the first high-speed signal photoelectric transmission module 11 does not receive the high-speed optical signal for a preset time length, the first high-speed signal photoelectric transmission module 11 sets an optical signal idle mark thereof to be in an effective state;

if the first high-speed signal photoelectric transmission module 11 receives a first preset high-speed optical signal sent from the optical fiber, setting an optical signal idle mark of the first high-speed signal photoelectric transmission module to be in an invalid state;

if the first high-speed signal photoelectric transmission module 11 receives the second preset high-speed optical signal sent from the optical fiber, the optical signal idle flag thereof is set to an invalid state.

The generation process of the first preset high-speed optical signal is as follows: when the low-speed signal monitoring function of the second high-speed signal photoelectric transmission module 41 of the transmitting end 4 monitors the low-speed electric signal provided by the video source 3 on the low-speed data line, the second high-speed signal photoelectric transmission module 41 generates a first preset high-speed electric signal, converts the first preset high-speed electric signal into a first preset high-speed optical signal, and transmits the first preset high-speed optical signal to the optical fiber.

The generation process of the second preset high-speed optical signal is as follows: when the second high-speed signal photoelectric transmission module 41 receives the second preset high-speed electrical signal sent after the source end wakes up, the second high-speed signal photoelectric transmission module 41 converts the second preset high-speed electrical signal into a second preset high-speed optical signal and then transmits the second preset high-speed optical signal to the optical fiber.

It will be understood that, in the embodiment of the present disclosure, even if the display device 2 and/or the video source 3 are in the sleep state, the first high-speed signal photo-electric transmission module 11 of the receiving end 1 is in the standby state, that is, the first high-speed signal photo-electric transmission module 11 can always obtain the power from the high-speed signal line, so as to identify the first preset high-speed optical signal or the second preset high-speed optical signal, which indicates that the high-speed optical signal will be received later, wake up the display device 2, and restore the power supply capability of the terminating power source Avcc in time to meet the signal transmission requirement. However, if the duration that the first high-speed signal photoelectric transmission module 11 does not receive the high-speed optical signal reaches the preset duration, which indicates that the current display device 2 and/or the video source 3 are in the sleep state, and no signal transmission requirement is generated on the receiving end, the power switch 13 is turned off to stop the power supply to the first low-speed signal photoelectric transmission module 12, so as to avoid generating unnecessary power consumption.

It should be noted that, in this embodiment, the preset time period may be adjusted according to the actual application requirement, which is not limited only herein.

In step S302, the controller controls the power switch to be turned off.

When the power switch 13 is turned off, the contact of the power switch 13 is separated from the high-speed signal line.

In step S303, the controller controls the power switch to be turned on.

After the controller 14 controls the power switch 13 to be turned on, the contacts of the power switch 13 are connected to the electrical connection points vcm_rx on the high-speed signal line, so that the terminating power source Avcc supplies power to the first low-speed signal electro-optical transmission module 12.

In yet another embodiment, during signal transmission, the video source 3 and/or the display device 2 may be awakened while in a dormant state in the following manner.

Fig. 4 shows a flow diagram of a wake-up method in an embodiment of the present disclosure. Referring to fig. 4, the wake-up method includes:

in step S401, the display device is in a sleep state.

For example, if the electric signal idle flag of the second high-speed signal photoelectric transmission module 11 is set to 1, that is, set to an active state, it indicates that the power switch 13 is turned off and the video source 3 and/or the display device 2 are in a sleep state.

In step S402a, the second high-speed signal photoelectric transmission module enables the IIC low-speed signal monitoring function of the second high-speed signal photoelectric transmission module.

Specifically, when the electric signal idle flag of the second high-speed signal photoelectric transmission module 41 is set to 1, the second high-speed signal photoelectric transmission module 41 enables the IIC (Inter-Integrated Circuit, integrated circuit bus) low-speed signal monitoring function of the second high-speed signal photoelectric transmission module 41. The IIC low-speed signal monitoring function of the second high-speed signal photo-electric transmission module 41 is turned on, and this function can monitor the data transmission condition on the low-speed signal line of the video source 3, for example, the data transmission condition on the IIC bus.

In step 403a, if the low-speed signal monitoring function monitors the second low-speed electrical signal on the low-speed data line, the second high-speed signal photoelectric transmission module 41 generates the first preset high-speed electrical signal.

In step 404a, the second high-speed signal photoelectric transmission module 41 converts the first preset high-speed electrical signal into a first preset high-speed optical signal and transmits the first preset high-speed optical signal to the optical fiber.

In step 405a, the first high-speed signal photoelectric transmission module 11 receives the first preset high-speed optical signal, sets the optical signal idle flag thereof to an invalid state, converts the first preset high-speed optical signal into a first preset high-speed electrical signal, and outputs the first preset high-speed electrical signal to the display device 2.

It should be noted that, steps 402a to 405a illustrate a wake-up process of the signal transmission system. In this process, after the video source 3 is awakened, it sends a second low-speed electrical signal to the second low-speed signal photoelectric transmission module 42, and when the IIC low-speed signal monitoring function of the second high-speed signal photoelectric transmission module 41 monitors that there is a second low-speed electrical signal on the IIC data line, the second high-speed signal photoelectric transmission module 41 generates and sends a first preset high-speed optical signal to the first high-speed signal photoelectric transmission module 11, and in response, the second high-speed signal photoelectric transmission module 41 changes to the normal transmission mode.

After the video source 3 is awakened, the video source 3 sends a second low-speed electrical signal to the second low-speed signal photoelectric transmission module 42 through the IIC data line to achieve signal transmission between the video source 3 and the display device 2. The second low-speed electrical signal may be the same as or different from the first low-speed electrical signal. Typically, for ease of configuration, the first low speed electrical signal is the same as the second low speed electrical signal.

It should be noted that, when the video source 3 and the display device 2 are in the sleep state, the power switch 13 of the receiving end 1 is turned off, so that the first low-speed signal photoelectric transmission module 12 cannot be powered, and the low-speed electrical signal cannot be transmitted to the display device 2. For this reason, when the IIC low-speed signal monitoring function of the second high-speed signal photoelectric transmission module 41 monitors that the low-speed electrical signal transmitted by the video source 3 is present on the IIC data line, the second high-speed signal photoelectric transmission module 41 generates and transmits a first preset high-speed optical signal, and the first preset high-speed optical signal is transmitted to the first high-speed signal photoelectric transmission module 11 through the optical fiber, and meanwhile, the second high-speed signal photoelectric transmission module 41 is converted into the normal transmission mode, that is, the optical signal idle flag of the second high-speed signal photoelectric transmission module 41 is set to 0. In practical applications, an electro-optical conversion device such as a light emitting diode may be disposed in the second high-speed signal photoelectric transmission module 41 to generate a first preset high-speed optical signal, and specifically, the first preset high-speed optical signal may be generated under the driving of the first preset high-speed electrical signal.

It should be noted that the first preset high-speed optical signal is not a valid video signal, but a high-speed optical signal for simulating a high-speed video signal, and functions to indicate to the receiving terminal 1 and the display device 2 that high-speed signal transmission is required, and wake up the receiving terminal 1 and the display device 2. The first preset high-speed optical signal is usually shorter in duration, the specific form can be flexibly designed, and the high-speed video signal can be simulated.

In order to facilitate the normal transmission of the subsequent low-speed signal, the second high-speed signal photoelectric transmission module 41 configures the second low-speed signal photoelectric transmission module 42 to be in a normal working mode after the second high-speed signal photoelectric transmission module 41 detects the second low-speed signal. In practical applications, a controller may be built in the second high-speed signal photoelectric transmission module 41, and the controller configures the second low-speed signal photoelectric transmission module 42 to be in a normal working mode.

The first high-speed signal photo-electric transmission module 11 outputs a first preset high-speed electric signal to the display device 2 so that the display device 2 is awakened, thereby terminating the restoration of the power supply capability of the power source Avcc. And switch 13 is also closed so that terminating power source Avcc also powers first low-speed signal optoelectronic transmission module 12. So that both the transmitting end 4 and the receiving end 1 of the pure light AOC work normally, and the video source 3 and the display device 2 can communicate normally.

In step 402b, the video source is awakened to send a second preset high-speed electrical signal to the second high-speed signal photoelectric transmission module 41.

In step 403b, the second high-speed signal photoelectric transmission module 41 converts the second preset high-speed electrical signal into a second preset high-speed optical signal and sends the second preset high-speed optical signal to the first high-speed signal photoelectric transmission module 11.

In step 404b, after the first high-speed signal photoelectric transmission module 11 receives the first preset high-speed optical signal, the optical signal idle flag of the first high-speed signal photoelectric transmission module 11 is set to be in an inactive state.

In step 405b, the first high-speed signal photoelectric transmission module 11 converts the first preset high-speed optical signal into a first preset high-speed electrical signal and outputs the first preset high-speed electrical signal to the display device.

It should be noted that, steps 402b to 405b illustrate a wake-up procedure of another signal transmission system. In this process, after the video source 3 is awakened, in order to achieve signal transmission between the video source 3 and the display device 2, the video source 3 sends a second preset high-speed electrical signal to the second high-speed signal photoelectric transmission module 41. The second preset high-speed electric signal may be the same as or different from the first preset high-speed electric signal. Typically, for ease of configuration, the second preset high speed electrical signal is the same as the first preset high speed electrical signal.

It should be noted that, when the second high-speed signal photoelectric transmission module 41 receives the second preset high-speed electrical signal sent by the video source 3, the second high-speed signal photoelectric transmission module 41 converts the second preset high-speed electrical signal into a second preset high-speed optical signal, the second preset high-speed optical signal is sent to the first high-speed signal photoelectric transmission module 11 through the pure optical active cable, and meanwhile, the second high-speed signal photoelectric transmission module 41 is converted into a normal transmission mode, that is, the optical signal idle flag of the second high-speed signal photoelectric transmission module 41 is set to 0. After the first high-speed signal photoelectric transmission module 11 receives the second preset high-speed optical signal sent by the second high-speed signal photoelectric transmission module 41 through the optical fiber, the optical signal idle flag of the first high-speed signal photoelectric transmission module 11 is set to 0, and the first high-speed signal photoelectric transmission module 11 starts to work normally, so that normal signal transmission can be performed. Meanwhile, the first high-speed signal photoelectric transmission module 11 converts the second preset high-speed optical signal into a second preset high-speed electric signal and outputs the second preset high-speed electric signal to the display device 2. In response, the display device 2 is awakened from the sleep state and the power supply capability of the terminating power source Avcc is restored to normal.

In order to facilitate the normal transmission of the subsequent low-speed signal, after the second high-speed signal photoelectric transmission module 41 receives the second preset high-speed electrical signal sent by the video source 3, the second high-speed signal photoelectric transmission module 41 may configure the second low-speed signal photoelectric transmission module 42 to be in a normal working mode. In practical applications, a controller may be built in the second high-speed signal photoelectric transmission module 41, and the controller configures the low-speed signal photoelectric transmission module 42 to be in a normal working mode.

In step S406, the controller controls the power switch to be closed.

The controller 14 controls the power switch 13 to be closed, the first low-speed signal photoelectric transmission module 12 is normally powered, and the first low-speed signal photoelectric transmission module 12 starts to work normally.

It can be understood that the wake-up method provided by the implementation of the present disclosure includes two wake-up paths:

first, after the video source 3 wakes up, a low-speed electrical signal may be sent out first, and then the optical signal idle flag of the first high-speed signal optical-electrical transmission module 11 is set to be in an inactive state through the steps 402a to 405 a.

Secondly, after the video source 3 wakes up, a high-speed electrical signal may be sent out first, and then the optical signal idle flag of the first high-speed signal optical-electrical transmission module 11 is set to be in an invalid state through the steps 402b to 405 b.

When the display device 2 is in the sleep state, the termination supply voltage Avcc of the display device is less supplied. At this time, the power switch 13 is turned off, the first low-speed signal photoelectric transmission module 12 at the receiving end is not powered, and accordingly, the low-speed electric signal cannot be transmitted to the display device 2. The first high-speed signal photoelectric transmission module 11 is powered by the termination power supply voltage Avcc, and can receive the first preset high-speed optical signal or the second preset high-speed optical signal in a short time and generate a corresponding high-speed electrical signal to be transmitted to the display device, so that the display device is awakened, and then the termination power supply voltage Avcc of the display device 2 is normally powered. Subsequently, the power switch 13 is closed, the first low-speed signal photoelectric transmission module 12 of the receiving end is supplied with power, and accordingly, the low-speed electric signal of the video source 3 is transmitted to the display device 2. So that the pure light active optical cable according to the embodiment of the present application wakes up the display device 2 by outputting the first preset high-speed electrical signal to the display device 2, regardless of whether the video source first generates the first preset high-speed electrical signal or the low-speed electrical signal when waking up. Even if the terminating power supply voltage Avcc of the display apparatus 2 is not sufficiently supplied in the sleep state, the power supply capability is restored after the display apparatus 2 is awakened, so that the receiving end of the pure light active optical cable is normally operated and the display apparatus is normally operated.

It can be understood that, by the low-speed signal monitoring function of the high-speed signal photoelectric transmission module of the transmitting end, in cooperation with optical signal communication of the high-speed signal photoelectric transmission module of the transmitting end/receiving end, under the condition that the low-speed signal appears first when the video source wakes up, even if the low-speed signal cannot be transmitted to the display device because the power supply switch of the low-speed signal photoelectric transmission module of the receiving end is not closed at this time, the high-speed signal can be simulated to be transmitted to the receiving end and the display device in a short time, so that the display device is waken up, and then the termination power supply voltage Avcc of the high-speed signal line supplies power normally.

The present disclosure also provides a pure optical active optical cable based on any of the receiving ends described above.

The pure optical active cable is described below in connection with its use in signal transmission.

For convenience of description, the description will be made with reference to the schematic structural view of the pure optical active optical cable shown in fig. 5. Fig. 5 shows a schematic structural diagram of a pure optical active optical cable in an embodiment of the present disclosure. Referring to fig. 5, the pure light active optical cable includes: a receiving end 1, an optical fiber and a transmitting end 4.

The receiving terminal 1 includes: a first high-speed signal photoelectric transmission module 11 and a first low-speed signal photoelectric transmission module 12; the power supply port a of the first high-speed signal photoelectric transmission module 11 is connected with the high-speed signal line of the receiving end 1, and the power supply port B of the first low-speed signal photoelectric transmission module 12 is connected with the high-speed signal line of the receiving end.

The transmitting end 4 includes: a second high-speed signal photoelectric transmission module 41 and a second low-speed signal photoelectric transmission module 42; the second high-speed signal photoelectric transmission module 41 is connected to the first high-speed signal photoelectric transmission module 11 through an optical fiber, and the second low-speed signal photoelectric transmission module 42 is connected to the first low-speed signal photoelectric transmission module 12 through an optical fiber.

When the pure light active optical cable transmits signals, the transmitting end 4 is connected with the source end 3, the receiving end 1 is connected with the destination end, that is, the transmitting end 4 is connected with the video source 3, and the receiving end 1 is connected with the display device 4.

The power supply mode of the pure light active optical cable is as follows: the first high-speed signal photoelectric transmission module 11 acquires power from the high-speed signal line of the receiving end, the first low-speed signal photoelectric transmission module 12 acquires power from the high-speed signal line of the receiving end, and the second high-speed signal photoelectric transmission module 41 and the second low-speed signal photoelectric transmission module 42 acquire power from the video source 3, respectively. For example, the video source 3 supplies power to the second high-speed signal photoelectric transmission module 41 and the second low-speed signal photoelectric transmission module 42 through the power supply line of 5V and the ground GND. It should be noted that the amount of the specific power supply voltage is related to the specific signal transmission system, and in other embodiments, the power supply voltage is not limited to 5V.

The signal transmission process of the pure light active optical cable is as follows: the second low-speed signal photoelectric transmission module 42 converts the first low-speed electric signal received from the video source 3 into a low-speed optical signal and transmits the low-speed optical signal to the first low-speed signal photoelectric transmission module 12 through an optical fiber. The first low-speed signal photoelectric transmission module 12 converts the low-speed optical signal into a first low-speed electric signal and transmits it to the display device 2. The second high-speed signal photoelectric transmission module 41 converts the first high-speed electric signal received from the video source 3 into a high-speed optical signal, and transmits the high-speed optical signal to the first high-speed signal photoelectric transmission module 11 through an optical fiber, and the first high-speed signal photoelectric transmission module 11 converts the high-speed optical signal into the first high-speed electric signal and transmits it to the display device 2.

Specifically, the video source 3 is connected to the display device 2 sequentially through the transmitting end 4, the optical fiber, and the receiving end 1. The video source 3 may be a host for providing a video signal, an HPD signal, an SCL signal, an SDA signal, a CEC signal, an EDID signal, and the like according to the HDMI protocol. The transmitting end 4 may be an adapter connected to the video source 3, where the transmitting end 4 is configured to photoelectrically convert a video signal provided by the video source 3 to obtain a high-speed optical signal and transmit the high-speed optical signal to the optical fiber, and photoelectrically convert signals such as an HPD signal, an SCL signal, an SDA signal, a CEC signal, and an EDID signal provided by the video source 3 to obtain a low-speed optical signal and transmit the low-speed optical signal to the optical fiber. In application, the transmission protocol between the video source 3 and the transmitting end 4, and between the receiving end 1 and the display device 2 may be a common audio/video transmission protocol such as DVI protocol, HDMI protocol, and the like.

In fig. 5, the optical fiber is represented by a connection line between the transmitting end 4 and the receiving end 1. In addition, fig. 5 depicts a plurality of connection lines between the video source 3, the transmitting end 4, the receiving end 1 and the display device 2, which represent connection lines for transmitting signals of different contents or speeds. In application, the connection lines between the video source 3 and the transmitting end 4 are all concentrated on one connector, and the connection lines between the receiving end 1 and the display device 2 are also concentrated on one connector. It will be appreciated that a pure optical active cable includes one or more optical fibers, with the high speed optical signal being transmitted on the same or different optical fibers as the low speed optical signal.

With continued reference to fig. 5, the receiving end 1 may further include: a power switch 13 and a controller 14. The controller 14 is used for controlling the power switch 13 to be turned on, so that the first low-speed signal photoelectric transmission module 11 obtains power from the high-speed signal line.

For example, when the display device 2 is in the sleep state, the power switch 13 is turned off, at this time, only the power supply port of the first high-speed signal photoelectric transmission module 11 is connected to the high-speed signal line of the receiving terminal 1, and the first high-speed signal photoelectric transmission module 11 is in the standby state, and the first low-speed signal photoelectric transmission module 12 stops supplying power, so as to reduce the power consumption of the receiving terminal.

Further, when the duration that the first high-speed signal photoelectric transmission module 11 does not receive the high-speed optical signal reaches the preset duration, the first high-speed signal photoelectric transmission module 11 sets the optical signal idle flag thereof to be in an active state, determines that the display device 2 is in the sleep mode, and the controller 14 controls the power switch 13 to be turned off.

While the display device is in the sleep state, it may be awakened by the controller 14 controlling the power switch 13 to be turned on in such a manner that the first low-speed signal photoelectric transmission module 12 obtains power from the high-speed signal line.

Specifically, when the second high-speed signal photoelectric transmission module 41 recognizes that the source terminal, such as the video source 3 in fig. 5, enters the sleep state, the second high-speed signal photoelectric transmission module 41 sets its electric signal idle flag to the active state, and stops transmitting the high-speed optical signal to the first high-speed signal photoelectric transmission module 11. The second high-speed signal photoelectric transmission module 41 enables the low-speed signal monitoring function of the second high-speed signal photoelectric transmission module 41, if the low-speed signal monitoring function of the second high-speed signal photoelectric transmission module 41 monitors a second low-speed electric signal on the low-speed data line, the second high-speed signal photoelectric transmission module generates a first preset high-speed electric signal, converts the first preset high-speed electric signal into a first preset high-speed optical signal and transmits the first preset high-speed optical signal to the optical fiber, the second high-speed signal photoelectric transmission module 41 is converted into a normal transmission mode, the second high-speed signal photoelectric transmission module 41 configures the second low-speed signal photoelectric transmission module 42 into the normal operation mode, the first high-speed signal photoelectric transmission module 11 sets an idle flag of the optical signal to an invalid state after receiving the first preset high-speed optical signal transmitted from the optical fiber, and outputs the first preset high-speed optical signal to the destination after converting the first preset high-speed optical signal into the first preset high-speed electric signal, when the idle flag of the first high-speed signal photoelectric transmission module 11 is set to the invalid state, the controller 14 controls the power switch 13 to be closed, the first low-speed signal photoelectric transmission module 12 starts to normally operate, and the first low-speed photoelectric transmission module 12 starts normally.

In another case, when the display device 2 is in the sleep state, it may also be woken up in such a manner that the controller 14 controls the power switch 13 to be turned on to cause the first low-speed signal photoelectric transmission module 12 to acquire electric power from the high-speed signal line of the receiving end 1.

Specifically, after the second high-speed signal photoelectric transmission module 41 receives the second preset high-speed electrical signal sent after the video source wakes up, the second high-speed signal photoelectric transmission module 41 converts the second preset high-speed electrical signal into the second preset high-speed optical signal and then transmits the second preset high-speed optical signal to the optical fiber, and the second high-speed signal photoelectric transmission module 41 is converted into the normal transmission mode. After receiving the second preset high-speed optical signal sent from the optical fiber, the first high-speed signal photoelectric transmission module 11 sets the optical signal idle mark to be in an invalid state, converts the second preset high-speed optical signal into a second preset high-speed electric signal, and outputs the second preset high-speed electric signal to the destination. When the optical signal idle flag of the first high-speed signal optical-electrical transmission module 11 is set to an inactive state, the controller 14 controls the power switch 13 to be turned on, the power supply of the low-speed signal optical-electrical transmission module 12 becomes normal, the first low-speed signal optical-electrical transmission module 12 starts to operate normally, and the second high-speed signal optical-electrical transmission module 41 configures the second low-speed signal optical-electrical transmission module 42 to operate normally.

It should be noted that, the method of controlling the power switch 13 to be turned on to enable the first low-speed signal photoelectric transmission module 12 to obtain the power from the high-speed signal line is described in detail in the embodiment according to fig. 4, and will not be further described herein.

The present disclosure also provides a pure light active optical cable, on the basis of any one of the foregoing pure light active optical cables, the pure light active optical cable of the embodiments of the present disclosure further includes: an adapter and a connector; the second high-speed signal photoelectric transmission module 41 is connected with the first high-speed signal photoelectric transmission module 11 through at least one section of switching optical fiber and then through the optical fiber, and the second low-speed signal photoelectric transmission module 42 is connected with the first low-speed signal photoelectric transmission module 12 through at least one section of switching optical fiber and then through the optical fiber; the optical fibers are connected in sequence, and the switching between two adjacent optical fibers is realized in a mode that the two optical fiber ends to be connected are provided with the adapter and the adapter is inserted into the connector.

Since the transmission medium of the pure optical active cable is an optical fiber, for some active cables, the 5V voltage signal provided by the source is not transmitted by the pure optical active cable from the source to the receiving end.

For a display device supporting Non-Link Recoverable Off state, in a sleep state, if a power input Pin (Pin) of an HDMI interface of the display device does not acquire a 5V voltage signal, the display device may be in the sleep state all the time, resulting in that a pure light AOC cannot wake up the display device from the sleep state. When the display device is intended to be awakened, the source terminal will emit a 5V voltage signal, but the pure light AOC connecting the source terminal and the display device may not transmit the 5V voltage signal emitted by the source terminal to the power input pin of the HDMI interface of the display device, and cause the display device in the Non-Link Recoverable Off state to be in the sleep state all the time because the 5V signal is not received.

In view of this, there is a need to solve the compatibility problem with the display device supporting Non-Link Recoverable Off state, which occurs in the process of multimedia signal transmission in various application scenarios such as plug, sleep and wake-up.

The embodiment of the disclosure provides a scheme applied to signal transmission, which obtains a 5V voltage signal from outside a pure light AOC through a repeater and transmits the voltage signal to a display device through the repeater, so that a certain voltage signal is provided for the display device to simulate the 5V voltage signal required for waking up the display device according to an HDMI protocol, and the compatibility problem in the signal transmission process of connecting a video source and a display by using the pure light AOC is effectively solved.

Fig. 6 illustrates an exemplary block diagram of a transmission system of some embodiments of the present disclosure. As shown in fig. 6, the transmission system comprises a video source 3, a pure light AOC, a repeater 600 and a display device 2, wherein the video source 3 comprises a transmitting end 4, a pure light AOC of an optical fiber and a receiving end 1, and the display device 2 corresponds to the embodiment according to fig. 5.

The repeater 600 is used to connect the receiving end 1 of the pure light AOC with the display device 2, so as to transmit the signal sent by the receiving end to the display device. The repeater 600 includes a high-speed signal line and a low-speed signal line. The repeater 600 is connected to the receiving end 1 through a high-speed signal line and a low-speed signal line, and the repeater 600 is connected to the display device 2 through a high-speed signal line and a low-speed signal line. Transmitted on the high-speed signal line are high-speed signals, including audio signals and/or video signals, and transmitted on the low-speed signal line are low-speed signals. The high-speed signal and the low-speed signal are both signals according to, for example, the HDMI protocol. For example, the high-speed signal line and the low-speed signal line of the repeater are both made of copper wires, and the high-speed signal and the low-speed signal are both electrical signals transmitted through the copper wires.

The repeater 600 includes a voltage input and a voltage output. The voltage input end is used for receiving a voltage signal from the outside of the receiving end. The voltage output comprises a first voltage output for connection to the display device 2. The repeater 600 is used to output a voltage signal received from a voltage input terminal to a first voltage output terminal. In some embodiments, the voltage signal may come from the display device 2 or an external power source. When the repeater receives the voltage signal from the display device 2, the interface corresponding to the interface between the voltage input terminal and the first voltage output terminal of the repeater 600 is a different interface (for example, a USB interface on the display device 2). In an application, when the display device supporting the Non-Link Recoverable off state needs to be woken up by the voltage signal Vcc of 5V, the voltage input terminal of the repeater 600 may obtain the voltage signal Vcc of 5V from the display device or the external power source, and forward the voltage signal Vcc to the HDMI interface of the display device 2 through the first voltage output terminal, so that the display device 2 exits the Non-Link Recoverable off state or wakes up the display device 2.

The repeater 600 may connect the receiving end 1 of the pure light AOC, which does not transmit the 5V voltage signal, with the display device 2, so that even if the 5V voltage signal provided by the video source 3 is not transmitted from the video source 3 to the display device 2 by the pure light AOC, the repeater 600 can forward the 5V voltage signal acquired from the display device 2 or an external power source to the HDMI interface of the display device 2 through the first voltage output end, to cause the display device 2 to exit the Non-Link Recoverable off state or wake up the display device.

By way of example, repeater 600 includes a Y-Cable as a voltage input. The Y-Cable includes, for example, a USB connector for connecting to a USB interface of the display device 2 to acquire a 5V voltage signal from the USB interface.

Fig. 7 shows an exemplary block diagram of a transmission system according to further embodiments of the present application. In comparison with the transmission system illustrated in fig. 6, the repeater in the transmission system illustrated in fig. 7 further includes: HDMI female connector and HDMI male connector. The HDMI female connector is used for connecting the receiving terminal 1. The HDMI male connector is used to connect the display device 2. It can be understood that the HDMI female connector and the HDMI male connector are two forms of HDMI connectors, and in other embodiments, the HDMI connector for connecting the receiving terminal 1 may select the HDMI female connector or the HDMI male connector according to specific requirements, and the HDMI connector for connecting the display device 2 may select the HDMI female connector or the HDMI male connector according to specific requirements.

The Y-Cable of the repeater includes a USB connector. The voltage input end of the repeater is a power input Pin of the USB connector, the first voltage output end of the repeater is a power output Pin (5V Pin) of the HDMI male connector, and the power input Pin of the USB connector is connected with the power output Pin of the HDMI male connector through the Y-Cable.

It should be noted that the connector for connecting the signal transmitting end may be another Type of connector, including but not limited to a Type-C, DVI, VGA connector. Unless otherwise specified, the HDMI connector referred to hereinafter is an HDMI male connector. Y-Cable connectors include, but are not limited to, 2-core power plugs, 3-core power plugs, multi-core power plugs, USB connectors, and aviation plugs.

In the example of fig. 7, the high-speed signal line of the repeater directly connects the HDMI female connector to the high-speed signal line of the HDMI male connector, and the low-speed signal line of the repeater directly connects the HDMI female connector to the low-speed signal line of the HDMI male connector.

Optionally, the 5V pin of the HDMI female connector is not connected with the 5V pin of the HDMI male connector. Because the 5V pin of HDMI of sink 1 will not provide a 5V voltage signal. Still alternatively, the 5V pin of the HDMI female connector is also connected with the 5V pin of the HDMI male connector, so that the repeater is also used for the HDMI cable of the related art.

Since the high-speed signal line of the repeater directly connects the HDMI female connector and the high-speed signal line of the HDMI male connector, the receiving terminal 1 can still obtain power from the terminating power source Avcc of the display device 2 to supply power to the first high-speed signal photoelectric transmission module 11 and the first low-speed signal photoelectric transmission module 12 after the repeater is connected. Thus, in application, the pure light AOC including the receiving end 1 may be connected to the display device 2 through a repeater in addition to the display device 2.

Still optionally, the Y-Cable further includes a ground line for providing a reference ground potential for the 5V voltage signal obtained by the power receiving terminal.

According to the embodiment of the application, the 5V voltage signal provided by the first voltage output end of the repeater is transmitted to the display device 2 through the power output pin of the HDMI connector, so that the display device 2 is awakened from the sleep state and is lighted.

Fig. 8A illustrates an exemplary block diagram of a repeater of some embodiments of the present disclosure, and fig. 8B illustrates an exemplary block diagram of a repeater of other embodiments of the present disclosure.

In fig. 8A, the repeater also includes a switch as compared to the repeater illustrated in fig. 7. The switch of the repeater connects the voltage input provided by the Y-Cable with the first voltage output connected to the 5V pin of the HDMI male connector. The voltage input end of the relay is controlled to be disconnected or connected with the first voltage output end through the switch. So that the repeater of fig. 8 is better compatible with a variety of cables.

The opening or closing of the switch is controlled by identifying whether the video source 3 and/or the display device 2 connected to the repeater is to be awakened. So that when the display device 2 is to be woken up, the switch is closed to connect the voltage input to the first voltage output via the repeater.

By way of example, in fig. 8A, by identifying whether there is a signal transmission on the low speed signal line of the repeater, the switch is closed when there is a low speed signal transmission, otherwise the switch is opened. Alternatively, the switch is controlled to be turned on or off by recognizing whether or not a high-speed signal line of the repeater has a signal transmission.

In fig. 8B, the switch of the repeater includes two inputs, one of which is a voltage input provided by the Y-Cable and the other of which is a 5V pin provided by the HDMI header connector. The switch of the repeater is used to select one of its two inputs to be connected to the first voltage output. For example, when the repeater is connected to the HDMI cable of the related art, the switch of the repeater communicates the 5V pin of the HDMI female connector with the 5V pin of the HDMI male connector. When the repeater is connected to an AOC according to embodiments of the present application or other pure light, the switch of the repeater communicates the voltage input with the 5V pin of the HDMI male connector.

Optionally, the repeater may further comprise a controller. The output end of the controller is connected with the control end of the switch. The controller controls the switch to be closed or opened. For example, in response to receiving a signal from the receiving end, the controller controls the switch to be turned on or off.

In the example of fig. 8A, one input of the controller is connected to the low-speed signal line for detecting whether a specific message is present on the low-speed signal line. If the specific message is detected to appear, the switch is closed, so that the voltage input end of the repeater is in a connection state with the first voltage output end of the repeater, and a 5V voltage signal Vcc acquired from the voltage input end can be transmitted to the display equipment through a 5V pin of the HDMI male connector, so that the display equipment wakes up. If the specific message is not detected, the controller turns off the switch, so that the voltage input end of the repeater is disconnected from the first voltage output end, and the 5V voltage signal received by the Y-Cable does not influence the working state of the display equipment. By setting the controller and the switch, the video source or the active Cable can control whether to control the working state of the display device by means of the 5V voltage signal obtained from the voltage input end of the Y-Cable by transmitting the specific message.

In the example of fig. 8B, the switch of the repeater detects the voltage of the 5V pin of the HDMI female connector, determines whether the 5V voltage signal exists, and transmits the voltage signal from the Y-Cable or the voltage signal from the HDMI female connector to the 5V pin of the HDMI male connector according to the determination result.

Specifically, in response to the voltage signal of the 5V pin of the HDMI header connector being greater than or equal to the first threshold, it is explained that the Cable connected to the HDMI header connector of the repeater provides the voltage signal of 5V, and at this time, the display device supporting the Non-Link Recoverable off state can be awakened without acquiring the voltage signal of 5V from the outside (Y-Cable). Therefore, the switch connects the 5V pin of the HDMI female connector with the output end of the switch (5V pin of the HDMI male connector), and the display device wakes up directly by acquiring the 5V voltage signal from the 5V pin of the HDMI female connector. The 5V voltage signal comes from, for example, video source 3. Alternatively, the 5V voltage signal is from another external power source. For example, by concatenating a plurality of repeaters, or repeaters connected between an HDMI Cable and a video source, the Y-Cable of any one of these repeaters can acquire a desired 5V voltage signal.

If the voltage signal of the 5V pin of the HDMI female connector is smaller than the first threshold, and the HDMI Cable does not provide the voltage signal of 5V or the provided voltage signal is insufficient to wake up the display device, the switch of the repeater connects the voltage input end of the Y-Cable with the output end of the switch (the 5V pin of the HDMI male connector), and the switch transmits the 5V voltage signal obtained from the Y-Cable to the display device.

The repeater according to the embodiment of the application can be connected with the receiving end of the active cable which does not transmit the 5V voltage signal and the display device, and can also be connected with the receiving end of the common cable and the display device, wherein the common cable refers to a cable which can be used for transmitting the 5V voltage signal. Alternatively, whether to supply the 5V voltage signal supplied from the Cable receiving terminal to the display device or to supply the 5V voltage signal from the Y-Cable to the signal receiving terminal is selected by identifying whether the receiving terminal of the Cable outputs a valid 5V voltage signal. Thus, the repeater according to the embodiments of the present application may be adapted to or compatible with a wider variety of cables, and is not limited to use with pure optical active cables.

Fig. 9 shows an exemplary block diagram of a transmission system of a further embodiment of the present disclosure.

The repeater in fig. 9 also includes a voltage conversion circuit as compared to the repeater in the transmission system shown in fig. 7. The voltage conversion circuit of the repeater receives the power supplied by the voltage input of the Y-Cable and converts it to, for example, 3.3V for enhancing the supply of power to the receiving end 1 of the pure optical AOC.

The output of the voltage conversion circuit is connected to the high-speed signal line of the repeater, and the terminating power source Avcc provided by the display device 2 is replaced or enhanced by supplying power to the high-speed signal line. The receiving end 1 of the pure optical AOC obtains power from the terminating power source Avcc through its high-speed signal line.

Optionally, the output end of the voltage conversion circuit is connected to a high-speed signal line of the repeater through the magnetic beads. The high-speed signal wire is pulled up to the voltage provided by the output end of the voltage conversion circuit through the magnetic beads so as to further strengthen power supply, so that the power supply of the first high-speed signal photoelectric transmission module 11 and the first low-speed signal photoelectric transmission module at the receiving end is normal, and therefore, both the high-speed signal and the low-speed signal can be normally transmitted.

Optionally, the voltage conversion circuit also provides a voltage signal to the first voltage output of the repeater, instead of providing the voltage signal taken from the voltage input directly to the first voltage output. Therefore, the node input terminal of the Y-Cable can acquire voltage signals from more external power sources without limiting the voltage value of the voltage signals provided by the external power sources to 5V voltage values required by the HDMI protocol.

In the example of fig. 9, the receiving end 1 is a receiving end according to an embodiment of the present application. The first high-speed signal photoelectric transmission module 11 thereof obtains electric power from the high-speed signal line of the receiving end 1. The high-speed signal line of the receiving terminal 1 is connected to the high-speed signal line of the repeater, so that the power supplied from the display device 2 and/or the voltage input terminal of the repeater is supplied to the first high-speed signal photoelectric transmission module 11 through the high-speed signal line of the repeater and the high-speed signal line of the receiving terminal 1. The repeater comprises a switch 13 for connecting the supply port B of the first low-speed signal electro-optical transmission module 12 also to the high-speed signal line of the receiving end 1. So that the power supplied by the voltage input of the display device 2 and/or the repeater is also supplied to the first low-speed signal photo-electric transmission module 12.

The repeater enhances the terminating power Avcc by taking power from the external power source so that even pure optical AOCs of the receiving end 1 according to the embodiment of the present application can benefit from the repeater according to the embodiment of the present application. The repeater can provide sufficient power to the receiving end of the pure optical AOC (not limited to the receiving end 1 according to the embodiment of the present application) through an external power source at any time. Even if the display device is in a sleep state, all circuits of the receiving end of the pure light AOC can normally operate, so that a signal for waking up the display device can be normally transmitted.

Fig. 10A shows an exemplary block diagram of a repeater of further embodiments of the present disclosure, and fig. 10B shows an exemplary block diagram of a repeater of further embodiments of the present disclosure.

Compared to the embodiment of fig. 9, the repeater of fig. 10A further comprises a signal processing chip.

The signal processing chip is used for forwarding the high-speed electrical signal and/or the low-speed electrical signal from the receiving terminal 1 to the display device 2. For example, the signal processing chip is used for performing signal enhancement on the input high-speed electric signal and/or low-speed electric signal, so that the transmission distance and the transmission quality of the signals are increased. When in use, the signal processing chip may be a driver type chip and/or a Repeater type chip.

Alternatively, the repeater according to the embodiment of the present application may not include a signal processing chip, and directly transmit a high-speed signal from a signal transmitting end to a signal receiving end through a high-speed signal line, and directly transmit a low-speed signal from the signal transmitting end to the signal receiving end through a low-speed signal line.

In some embodiments, the number of the signal processing chips may be 1, and the input ends of the signal processing chips are respectively connected with the high-speed signal line and the low-speed signal line of the receiving end 1, and the output ends of the signal processing chips are respectively connected with the high-speed signal line and the low-speed signal line of the repeater, which are connected with the display device. In other embodiments, 2 signal processing chips may be used, where one input terminal is connected to the high-speed signal line of the receiving terminal 1 for enhancing the high-speed signal, and another input terminal is connected to the low-speed signal line of the input terminal 1 for enhancing the low-speed signal. Still alternatively, 1 signal processing chip is used to strengthen only the high-speed signal from the receiving terminal 1 and then provide the signal to the receiving terminal, and the low-speed signal from the receiving terminal 1 is directly transmitted to the display device through the low-speed signal line.

In the embodiment of fig. 10A, optionally, the power output by the voltage conversion circuit is also used to power the signal processing chip. The voltage output by the voltage conversion circuit is also used to provide a terminating power source Avcc for the high-speed signal line.

In contrast to the embodiment of fig. 10A, the repeater of fig. 10B also includes a switch. In fig. 10B, the switch of the repeater, the switch of fig. 8B operates in substantially the same manner. The switch of the repeater comprises two input ends, wherein one input end is a voltage input end provided for the Y-Cable, and the other input end is a 5V pin provided for the HDMI female connector. The switch of the repeater is used to select one of its two inputs to be connected to the first voltage output. Thus, depending on whether the +5V voltage signal is present at the 5V pin of the HDMI female connector, the switch selects whether to connect the 5V pin of the HDMI female connector to the first voltage output terminal or to connect the voltage input terminal of the Y-Cable to the first voltage output terminal.

The receiving end 1 according to the embodiment of the present application is separable from the repeater. For a scene that the display does not support the Non-LinkRecoverable Off state, a repeater which is not used can be used, and the pure light AOC is directly connected with the video source 3 and the display device 2, so that the flexibility of the system is increased.

It will be appreciated that the operation of the receiving end 1 of the pure optical AOC according to embodiments of the present application need not be changed, whether or not a repeater is used. The receiving end 1 also does not need to distinguish whether it is directly connected to a repeater or a display device.

While various embodiments of the present disclosure have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the present disclosure. It should be understood that various alternatives to the embodiments of the disclosure described herein may be employed in practicing the disclosure. The appended claims are intended to define the scope of the disclosure and are therefore to cover all equivalents or alternatives falling within the scope of these claims.

Claims

1. A transmission system comprising an active optical cable and a repeater for transmitting signals between a source and a destination, the active optical cable comprising a transmitting end, an optical cable and a receiving end, the transmitting end being adapted to connect with the source and the receiving end being adapted to connect with the destination,

the receiving end is connected with the repeater;

the relay is respectively connected with the receiving end and the destination end to replace the receiving end to be connected with the destination end and transmit the electric signal from the receiving end to the destination end;

The repeater includes: a voltage input terminal and a voltage output terminal;

the voltage input end is used for receiving a voltage signal from outside the active optical cable; the repeater is used for outputting the voltage signal received by the voltage input end to the voltage output end;

the voltage output terminal is used for providing a voltage signal for the destination terminal.

2. The transmission system according to claim 1, wherein,

the repeater comprises an HDMI connector, a USB connector and a high-speed signal line;

the HDMI connector is used for connecting the destination end, the voltage output end is a power output pin of the HDMI connector, and the voltage input end is connected with the USB connector;

the high-speed signal line of the repeater is used for connecting the high-speed signal line of the receiving end.

3. The transmission system according to claim 2, wherein,

the receiving end comprises a high-speed signal line, a first high-speed signal photoelectric transmission module and a first low-speed signal photoelectric transmission module;

the power supply port of the first high-speed signal photoelectric transmission module is connected with the high-speed signal line of the receiving end;

and a power supply port of the first low-speed signal photoelectric transmission module is connected with a high-speed signal line of the receiving end.

4. The transmission system according to claim 3, wherein,

the receiving end comprises a power switch;

the power supply port of the first low-speed signal photoelectric transmission module is connected with the high-speed signal line of the receiving end through the power switch;

the power switch is closed in response to power being obtained from the high-speed signal line of the receiving end;

the power switch is turned off in response to the first high-speed signal photoelectric transmission module not receiving the optical signal for a long time, so that the first high-speed signal photoelectric transmission module enters a standby state;

and the power switch is closed in response to the first high-speed signal photoelectric transmission module changing from a standby state to normal operation.

5. The transmission system according to claim 4, wherein,

the repeater includes: an HDMI female connector, an HDMI male connector and a Y-Cable Cable;

the HDMI female connector is used for connecting the receiving end;

the HDMI male connector is used for connecting the destination end;

the Y-Cable Cable comprises a first connector;

the voltage input end is a power input pin of the first connector;

the voltage output end is a power output pin of the HDMI male connector;

And a power input pin of the first connector is connected with a power output pin of the HDMI male connector through the Y-Cable.

6. The transmission system of claim 5, wherein a power input pin of the HDMI female connector is disconnected from a power output pin of the HDMI male connector.

7. The transmission system of claim 6, wherein the transmission system is configured to transmit the data,

the repeater further includes: a switch;

the first input end of the switch is connected with the power input pin of the HDMI female connector, the second input end of the switch is connected with the power input end, and the output end of the switch is connected with the power output pin of the HDMI male connector;

the switch is used for connecting one of a power input pin and a power input end of the HDMI female connector to a power output pin of the HDMI male connector.

8. The transmission system of claim 7, wherein the data is transmitted via a network to the host device,

the repeater further includes: a voltage conversion circuit;

an input end of the voltage conversion circuit receives a voltage signal from the voltage input end, and an output end of the voltage conversion circuit is connected to a high-speed signal line of the repeater.

9. A transmission system according to any one of claims 1-8, characterized in that,

the repeater also comprises a signal processing chip;

the signal processing chip is used for enhancing high-speed signals and/or low-speed signals from the receiving end.

10. A repeater is characterized in that,

the repeater is used for connecting a receiving end and a destination end of the active optical cable and forwarding an electric signal from the receiving end to the destination end, wherein the active optical cable is used for connecting the source end and the destination end; the active optical cable comprises a transmitting end and a receiving end, wherein the transmitting end is used for connecting the source end, and the receiving end is used for connecting the destination end;

the repeater includes: a voltage input terminal and a voltage output terminal;