CN216085638U

CN216085638U - Signal transmission device

Info

Publication number: CN216085638U
Application number: CN202122637085.2U
Authority: CN
Inventors: 殷文涵; 韩旗; 宛铮; 吴禹亮; 刘杰
Original assignee: Shenzhen Lontium Semiconductor Technology Co ltd
Current assignee: Shenzhen Lontium Semiconductor Technology Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-03-18
Anticipated expiration: 2031-10-29

Abstract

The utility model provides a signal transmission device, which comprises a high-definition multimedia HDMI interface, a 3.0 version universal serial bus USB3.0 interface, a Type-C interface and a signal transmission chip, wherein the input end of the HDMI interface is connected with equipment for outputting HDMI signals, the output end of the HDMI interface is connected with the signal transmission chip so as to convert the HDMI signals into standard video interface DP signals by using the signal transmission chip, the input end of the USB3.0 interface is connected with equipment for outputting USB3.0 signals, the output end of the USB3.0 interface is connected with the signal transmission chip, and the signal transmission chip outputs DP signals, USB3.0 signals or combined signals of the DP signals and the USB3.0 signals by using the Type-C interface. Therefore, compared with 3 chips, the HDMI signal can be converted into the DP signal by utilizing an independent signal transmission chip, namely the HDMI interface is converted into the Type-C interface, the cost is low, the power consumption is low, and the debugging difficulty is low.

Description

Signal transmission device

Technical Field

The present invention relates to the field of signal transmission, and in particular, to a signal transmission apparatus.

Background

With the rapid development of electronic technology, various signal transmission interfaces can be customized on electronic products, so as to facilitate connection with other devices by using the signal transmission interfaces.

At present, some electronic products are connected by using a Type-C interface, such as an ultra-thin high definition display or virtual reality VR/augmented reality AR glasses. However, some electronic products are relatively slow to update, and are connected to other devices by using a High Definition Multimedia Interface (HDMI) Interface, so that a device for converting the HDMI Interface into a Type-C Interface is required.

The device that converts the HDMI interface into the Type-C interface at present need utilize 3 chips to carry out signal transmission, and the consumption is high, and is with high costs, and the design debugging degree of difficulty is big, can not satisfy the low-cost demand of carrying out signal transmission.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a signal transmission device, which can meet the requirement of low cost signal transmission.

The embodiment of the application provides a signal transmission device, the device includes: the device comprises a high-definition multimedia HDMI interface, a 3.0 version universal serial bus USB3.0 interface, a Type-C interface and a signal transmission chip;

the input end of the HDMI is connected with equipment for outputting HDMI signals, and the output end of the HDMI is connected with the signal transmission chip;

the input end of the USB3.0 interface is used for connecting equipment for outputting USB3.0 signals, and the output end of the USB3.0 interface is used for connecting the signal transmission chip;

the output end of the Type-C interface is used for connecting a target device, the target device is a device for performing high-definition multimedia display by using the Type-C interface, and the input end of the Type-C interface is used for connecting the signal transmission chip;

the signal transmission chip is used for converting the HDMI signal into a standard video interface (DP) signal and determining and outputting the DP signal and/or the USB3.0 signal.

Optionally, the signal conversion chip includes: the HDMI signal conversion module, the data selector MUX module and the configuration channel CC control module;

the HDMI signal conversion module is connected with the output end of the HDMI interface, the HDMI signal conversion module is connected with the data selector MUX module, and the HDMI signal conversion module is used for converting the HDMI signal into a standard video interface DP signal and transmitting the standard video interface DP signal to the data selector MUX module;

the data selector MUX module is connected with the output end of the USB3.0 interface and used for receiving a USB3.0 signal transmitted by the output end of the USB3.0 interface;

and the configuration channel CC control module is used for determining that the data selector MUX module outputs the DP signal and/or the USB3.0 signal according to the target equipment.

Optionally, the data selector MUX module is further configured to perform signal amplification on the received USB3.0 signal.

Optionally, the CC control module for configuring the channel includes a first CC control module and a second CC control module, where the first CC control module is configured to determine that the data selector MUX module outputs the DP signal and/or the USB3.0 signal;

the device further comprises: a power adapter and a power supply module;

the second CC control module is connected with the power adapter and used for determining the voltage and/or current output by the power adapter according to the target equipment and the signal transmission chip;

the power adapter is used for outputting the voltage and/or the current determined by the second CC control module;

the power supply module is connected with the power adapter and used for supplying power to the HDMI signal conversion module, the data selector MUX module, the configuration channel CC control module and the target device through the Type-C interface.

Optionally, the power supply module includes a power switching circuit and a power step-down module;

the power supply switching circuit is connected with the power supply adapter, the power supply switching circuit is connected with the power supply voltage reduction module, and the power supply switching circuit is used for providing the voltage and/or the current output by the power supply adapter to the power supply voltage reduction module;

the power supply voltage reduction module is used for reducing the voltage and/or current output by the power supply adapter and supplying power to the HDMI signal conversion module, the data selector MUX module and the configuration channel CC control module;

the power supply switching circuit is connected with the Type-C interface and used for providing the voltage and/or the current output by the power adapter to the target equipment through the Type-C interface.

Optionally, the signal transmission chip controls, by using a bus expander GPIO, whether the power switching circuit supplies the voltage and/or current output by the power adapter to the power step-down module and the target device.

Optionally, the power supply voltage reduction module includes a primary voltage reduction module and a secondary voltage reduction module;

the primary voltage reduction module is connected with the power supply switching circuit and is used for reducing the voltage and/or current output by the power supply adapter and providing the reduced voltage and/or current for the secondary voltage reduction module;

and the secondary voltage reduction module is used for reducing the reduced voltage and/or current again and supplying power to the HDMI signal conversion module, the data selector MUX module and the configuration channel CC control module.

Optionally, the apparatus further comprises: an auxiliary signal AUX processing module;

the auxiliary signal AUX processing module is connected with the HDMI signal conversion module and used for generating an adjusting signal according to the obtained target data and transmitting the adjusting signal to the HDMI signal conversion module, the adjusting signal is used for adjusting attribute information of a standard video interface DP signal obtained through conversion, the target data is extended display identification data EDID and configuration data DPCD, and the attribute information is resolution and DP signal rate of target equipment matched with the target equipment.

Optionally, the HDMI signal conversion module includes a signal receiving module, a data recovery module, a signal conversion module, and a signal sending module;

the signal receiving module is connected with the output end of the HDMI and used for receiving HDMI signals and transmitting the HDMI signals to the data recovery module;

the data recovery module is used for processing the HDMI signals and transmitting the HDMI signals to the signal conversion module;

the signal conversion module is used for converting the HDMI signal into a standard video interface (DP) signal and transmitting the signal to the signal sending module;

the signal sending module is connected with the data selector MUX module and is used for transmitting the DP signals to the data selector MUX module;

and the auxiliary signal AUX processing module transmits the adjusting signal to the signal conversion module and the signal sending module.

Optionally, the data selector MUX module is connected to the input end of the Type-C interface by using a differential signal line;

the CC control module of the configuration channel is also used for identifying the connection direction of the target equipment and the output end of the Type-C interface, and the connection direction comprises forward connection or reverse connection;

and the configuration channel CC control module is also used for controlling the data selector MUX module to output the DP signal transmission sequence of the differential signal line matched with the connection direction according to the connection direction.

The signal transmission device that this application embodiment provided, including high definition multimedia HDMI interface, 3.0 version universal serial bus USB3.0 interface, Type-C interface and signal transmission chip, wherein, the equipment of output HDMI signal is connected to the input of HDMI interface, the signal transmission chip is connected to the output, so that utilize the signal transmission chip to convert the HDMI signal into standard video interface DP signal, the equipment of output USB3.0 signal is connected to the input of USB3.0 interface, the signal transmission chip is connected to the output, the signal transmission chip will utilize Type-C interface output DP signal, the combination signal of USB3.0 signal or DP signal and USB3.0 signal. Therefore, compared with 3 chips, the HDMI signal can be converted into the DP signal by utilizing an independent signal transmission chip, namely the HDMI interface is converted into the Type-C interface, the cost is low, the power consumption is low, and the debugging difficulty is low.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic diagram illustrating a structure of converting an HDMI interface into a Type-C interface;

fig. 2 is a schematic structural diagram illustrating a signal transmission apparatus according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of another signal transmission apparatus provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram illustrating another signal transmission apparatus provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of another signal transmission device according to an embodiment of the present application.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited by the specific embodiments disclosed below.

Next, the present application will be described in detail with reference to the drawings, and in the detailed description of the embodiments of the present application, the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration, and the drawings are only examples, which should not limit the scope of the protection of the present application. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Referring to fig. 1, a schematic structural diagram of converting an HDMI interface into a Type-C interface is shown. The structure includes an HDMI (High Definition Multimedia Interface) Interface 110, a 3.0 version Universal Serial Bus (USB 3.0) Interface 120, a Type-

C Interface

130, and 3 chips, where the 3 chips are an HDMI signal to standard video Interface (DisplayPort, DP) signal chip 140, a data selector (MUX) chip 150, and a Configuration Channel (CC) control chip 160. The HDMI interface 110 is connected to the HDMI to DP signal conversion chip 140, converts the HDMI signal input from the HDMI interface 110 into a DP signal, directly inputs the USB3.0 signal to the MUX chip 150 through the USB3.0 interface 120, the MUX chip 150 is connected to the CC control chip 160, and the CC control chip 160 controls the MUX chip 150 to determine to output the DP signal, the USB3.0 signal, or a mixed signal of the DP signal and the USB3.0 signal through a Power Delivery Protocol (PD), and then outputs the determined signal through the Type-C interface 130.

Utilize 3 chips to convert the HDMI interface into Type-C interface at present, the cost is higher to because 3 chips belong to different chip producers, the chip standard is different, lead to the debugging design degree of difficulty big, and utilize 3 chip combinations to realize the function that the HDMI interface changes Type-C interface, the consumption is higher. Therefore, the device for converting the HDMI interface into the Type-C interface by using 3 chip combinations at present cannot meet the requirements of low cost and low power consumption for signal transmission.

When the USB3.0 signal is input to the MUX chip 150 through the USB3.0 interface 120, the USB3.0 signal is transmitted through the USB3.0 cable. The USB3.0 signal may be attenuated in the USB3.0 wire, and when the signal is output through the MUX chip 150 via the Type-C interface 130, the attenuation of the USB3.0 signal may cause that a device connected to the USB3.0 interface and outputting the USB3.0 signal may not recognize the device of the Type-C interface converted from the HDMI interface.

Based on this, the embodiment of the application provides a signal transmission device, including high definition multimedia HDMI interface, 3.0 version universal serial bus USB3.0 interface, Type-C interface and signal transmission chip, wherein, the input of HDMI interface connects the equipment of output HDMI signal, the output connects the signal transmission chip, so that utilize the signal transmission chip to convert the HDMI signal into standard video interface DP signal, the equipment of output USB3.0 signal is connected to the input of USB3.0 interface, the output connects the signal transmission chip, the signal transmission chip will utilize Type-C interface to output DP signal, USB3.0 signal or the combined signal of DP signal and USB3.0 signal. Therefore, compared with 3 chips, the HDMI signal can be converted into the DP signal by utilizing an independent signal transmission chip, namely the HDMI interface is converted into the Type-C interface, the cost is low, the power consumption is low, and the debugging difficulty is low.

For a better understanding of the technical solutions and effects of the present application, specific embodiments will be described in detail below with reference to the accompanying drawings.

Referring to fig. 2, a schematic structural diagram of a signal transmission device according to an embodiment of the present application is shown, where the signal transmission device 2000 includes: a High Definition Multimedia Interface (HDMI) Interface 210, a Universal Serial Bus (Universal Serial Bus rev 3.0) Interface 220 of version 3.0, a Type-C Interface 230, and a signal transmission chip 240.

The input end of the HDMI interface 210 is used to connect a device outputting HDMI signals, and the HDMI interface 210 can use HDMI wires to connect any device supporting HDMI signal output. The output end of the HDMI is used for connecting a signal transmission chip, that is, the HDMI interface 210 transmits the received HDMI signal to the signal transmission chip 240. In practical applications, the form of the HDMI interface 210 is not limited, and may be a male connector or a female connector.

The input end of the USB3.0 interface 220 is used to connect a device for outputting USB3.0 signals, and the USB3.0 interface 220 can be connected to any host port supporting USB3.0 signal output through a USB3.0 wire. The output terminal of the USB3.0 interface 220 is used to connect to the signal transmission chip 240. In practical applications, the USB3.0 interface 220 is not limited in form, and may be a male socket or a female socket.

The input end of the Type-C interface 230 is used for connecting the signal transmission chip 240, the output end of the Type-C interface 230 is used for connecting the target device 250, and the target device 250 is a device for performing high-definition multimedia display by using the Type-C interface. In practical applications, the Type-C interface 230 is not limited in form, and may be a male socket or a female socket. When the Type-C interface 230 is a female socket, the Type-C interface 230 can be connected to the target device in a forward direction or in a reverse direction, that is, the Type-C interface 230 can support forward insertion output or reverse insertion output.

The signaling chip 240 is an Application Specific Integrated Circuit (ASIC) chip, which may be LT6711A, for converting HDMI signals into standard video interface (DP) signals, and determining to output DP signals alone, USB3.0 signals alone, or a combination of DP signals and USB3.0 signals. The output signal may specifically be determined according to the requirements of the target device 250.

That is to say, in the embodiment of the present application, after the HDMI signal is input to the signal transmission chip 240 by using the HDMI interface 210, the signal transmission chip 240 converts the HDMI signal into the standard video interface DP signal, and after the USB3.0 signal is input to the signal transmission chip 240, the signal transmission chip 240 determines that the signal output by using the Type-C interface 230 is the DP signal, the USB3.0 signal, or a combination signal of the DP signal and the USB3.0 signal according to the requirement of the target device 250. Therefore, compared with 3 chips, the embodiment of the application can convert the HDMI signal into the DP signal by using an independent signal transmission chip 240, i.e., convert the HDMI interface into the Type-C interface, so that the cost is low, the power consumption is low, and the debugging difficulty is low.

In an embodiment of the present application, the signal transmission chip 240 may include the following parts: the HDMI signal conversion module 241, the data selector (MUX) module 242, and the Configuration Channel (CC) control module 243 implement the function of converting the HDMI interface into the Type-C interface, as shown in fig. 3.

The HDMI signal conversion module 241 is connected to an output end of the HDMI interface 210, and is configured to convert the received HDMI signal into a DP signal. The HDMI signal conversion module 241 is connected to the data selector MUX module 242, and is configured to transmit the converted DP signal to the data selector MUX module 242.

When the HDMI signal conversion module 241 is used for signal conversion, the HDMI signal conversion module 241 may include a signal receiving module 241-1, a data recovery module 241-2, a signal conversion module 241-3, and a signal sending module 241-4, which is described with reference to fig. 3.

The signal receiving module 241-1 is connected to the output end of the HDMI interface 210, and is configured to receive an HDMI signal, perform equalization processing on the HDMI signal, and transmit the signal to the data recovery module 241-2. After receiving the HDMI signal, the data recovery module 241-2 processes the HDMI signal to recover the clock and data of the HDMI signal, and transmits the clock and data to the signal conversion module 241-3. The signal conversion module 241-3 converts the processed HDMI signal into a DP signal, and transmits the DP signal to the signal transmission module 241-4. The signal sending module 241-4 is connected to the data selector MUX module 242, and the signal sending module 241-4 is configured to package the DP signal according to the specification requirement of the standard video interface DP, and transmit the DP signal to the data selector MUX module 242.

With continued reference to fig. 3, the data selector MUX module 242 is connected to the output terminal of the USB3.0 interface 220, and the data selector MUX module 242 is configured to receive the USB3.0 signal transmitted by the output terminal of the USB3.0 interface 220 and is further configured to receive the DP signal sent by the signal sending module 241-4.

In the embodiment of the present application, the data selector MUX module 242 further has a function of performing signal amplification on the received USB3.0 signal, that is, the data selector MUX module 242 is further configured to perform signal amplification on the USB3.0 signal transmitted in the USB3.0 wire, so as to compensate for the attenuation of the USB3.0 signal caused by the USB3.0 wire.

With continued reference to fig. 3, the configuration channel CC control module 243 has one end connected to the data selector MUX module 242 and the other end connected to the Type-C interface 230. Configuration channel CC control block 243 is used to determine whether data selector MUX block 242 outputs the DP signal, USB3.0 signal, or a combination of the DP signal and USB3.0 signal, depending on target device 250. That is, the specific output signal of the data selector MUX module 242 is determined by the configuration channel CC control module 243. Specifically, the Configuration Channel CC control module 243 includes a microprocessor, and can communicate with the target device 250 through a Configuration Channel (CC) signal line 243-3. In practical applications, the CC control module 243 receives and analyzes a Power Delivery Protocol (PD) transmitted by the target device 250 through the CC signal line, determines whether the target device 250 has been accessed, and determines whether the data selector MUX module 242 outputs a DP signal, a USB3.0 signal, or a combined signal of the DP signal and the USB3.0 signal according to the content in the analyzed PD protocol.

In the embodiment of the present application, the data selector MUX module 242 is connected to the input end of the Type-C interface 230 by using a differential signal line (Link Lanes)242-1, where the differential signal line (Link Lanes) generally includes 4 pairs of signal lines, different signals may be transmitted on different differential signal lines, and the differential signal line may be a DP signal or a USB3.0 signal.

The configuration channel CC control module 243 may further be configured to identify a connection direction between the target device 250 and the output end of the Type-C interface 230, where the connection direction includes a forward connection or a reverse connection, that is, the configuration channel CC control module 243 may further identify whether the Type-C interface 230 is currently in a forward insertion output or a reverse insertion output, and then may control the data selector MUX module 242 to output a DP signal transmission sequence of the differential signal line matching the connection direction according to the connection direction.

That is, the configured channel CC control module 243 identifies whether the Type-C interface 230 is currently outputting the signal in the forward insertion mode or the reverse insertion mode, and adjusts the sequence of the different signals on the Link Lanes by controlling the data selector MUX module 242, so as to adjust the signal data corresponding to the forward insertion mode or the reverse insertion mode.

In the embodiment of the present application, a power adapter 260 and a power supply module 270 may be further disposed in the signal transmission device, and the power adapter 260 may input the determined output voltage and/or current to the power supply module 270, so as to supply power to the signal transmission chip 240 and the target device 250 by using the power supply module 270. Referring to fig. 4, the configuration channel CC control module 243 includes a first CC control module 243-1 and a second CC control module 243-2, the first CC control module 243-1 is used to communicate with the target device, and determine whether the data selector MUX module 242 outputs the DP signal, the USB3.0 signal, or a combination of the DP signal and the USB3.0 signal.

The second CC control module 243-2 is connected to the power adapter 260, and is configured to determine a voltage and/or a current output by the power adapter 260 according to the target device 250 and the signal transmission chip 240, so as to supply power. That is, the second CC control module 243-2 may communicate with the power adapter 260 using the CC signal line 243-3 in the PD protocol by which the voltage and/or current output by the power adapter 260 is determined. The power adapter 260 may provide sufficient power with an output power of up to 100 watts, a maximum voltage of 20 volts, and a maximum current of 5 amps.

The power adapter 260 is used to output the voltage and/or current determined by the second CC control module 243-2. The power adapter 260 may be a standard PD protocol carrying adapter or may be an adapter for a 5 volt (V) electronic terminal.

The power supply module 270 is connected to the power adapter 260, and is used for supplying power to the signal transmission chip 240 and the target device 250. Specifically, the power supply module 270 is connected to and supplies power to the HDMI signal conversion module 241, the data selector MUX module 242, and the configuration channel CC control module 243, and the power supply module 270 supplies power to the target device 250 through the Type-C interface 230.

In an embodiment of the present application, the power supply module 270 may include a power switching circuit 271 and a power step-down module 272, which is illustrated with continued reference to fig. 4. The power switching circuit 271 is connected to the power adapter 260 and is configured to receive the voltage and/or current output by the power adapter 260.

The power switching circuit 271 is connected to the power step-down module 272, the power switching circuit 271 is connected to the Type-C interface 230, and the power switching circuit 271 is configured to provide the voltage and/or current output by the power adapter 260 to the power step-down module 272 and to the target device 250 through the Type-C interface 230.

The power voltage reducing module 272 is configured to reduce the voltage and/or current output by the power adapter 260 and supply power to the signal transmission chip 240, that is, to the HDMI signal conversion module 241, the data selector MUX module 242, and the configuration channel CC control module 243.

In embodiments of the present application, the power down module 272 may include a primary down module 272-1 and a secondary down module 272-2, as illustrated with continued reference to FIG. 4. The primary voltage-reducing module 272-1 is connected to the power switching circuit 271, and the primary voltage-reducing module 272-1 is configured to reduce the voltage and/or current output by the power adapter 260 and provide the reduced voltage and/or current to the secondary voltage-reducing module 272-2. The second-stage voltage-reducing module 272-2 is configured to reduce the reduced voltage and/or current again, and supply power to the signal transmission chip 240, that is, to the HDMI signal conversion module 241, the data selector MUX module 242, and the configuration channel CC control module 243. By supplying power to the signal transmission chip 240 in such a two-stage voltage and/or current reduction manner, it is possible to ensure stable power supply of the signal transmission chip 240.

In practical applications, a chip power module 273 may be further disposed in the signal transmitting chip 240, and the chip power module 273 is connected to the secondary voltage-reducing module 272-2, and is configured to receive the voltage and/or current of the secondary voltage-reducing module 272-2, and supply power to the signal transmitting chip 240 by using the voltage and/or current, that is, supply power to the HDMI signal converting module 241, the data selector MUX module 242, and the configuration channel CC control module 243, so as to maintain the signal transmitting chip 240 to operate normally.

As an example, the primary buck module 272-1 steps down the voltage of 5V-20V outputted by the power adapter 260 to 5V and then provides the voltage to the secondary buck module 272-2, and then the secondary buck module 272-2 steps down the voltage of 5V to 1.2V, 1.8V or 3.3V and provides the voltage to the chip power module 273, and the chip power module 273 provides the voltage to the signal transmitting chip 240.

In the embodiment of the present application, after the power adapter 260 and the second CC control module 243-2 determine the output voltage by using the PD protocol, the voltage is output to the power switching circuit 271, and the signal transmission chip 240 controls whether the power switching circuit 271 provides the voltage output by the power adapter 260 to the power step-down module 270 and the target device 250 by using the bus expander GPIO 280. Specifically, the signal transmission chip 240 controls the power switching circuit 271 to provide voltage to the power step-down module 270 by using the bus expander GPIO280, so as to supply power to the signal transmission chip 240, when the second CC control module 243-2 detects that the target device 250 is connected, the signal transmission chip 240 controls the power switching circuit 271 to provide voltage to the Type-C interface 230 by using the bus expander GPIO280, so as to supply power to the target device 250 by using the Type-C interface 230, and when the second CC control module 243-2 detects that the target device 250 is pulled out, the signal transmission chip 240 controls the power switching circuit 271 to close the voltage provided to the Type-C interface 230 by using the bus expander GPIO 280.

In an embodiment of the present application, the signal transmission apparatus may further include an Auxiliary signal (AUX) processing module 290, as shown in fig. 5. The auxiliary signal AUX processing module 290 is connected to the HDMI signal conversion module 241, and is configured to generate an adjustment signal according to the obtained target Data, and transmit the adjustment signal to the HDMI signal conversion module 241, where the adjustment signal is used to adjust attribute information of the standard video interface DP signal obtained through conversion, the target Data is Extended Display Identification Data (EDID) and Configuration Data (DPCD), and the attribute information is resolution and DP signal rate of the target device 250 matched with the target device 250.

That is, the AUX processing module 290 is configured to process an AUX auxiliary signal of the DP signal, where the AUX auxiliary signal may be used to assist the DP signal to obtain EDID data and DPCD data, where the EDID data can be used to determine a resolution of a multimedia video displayed on the target device 250, the target device 250 outputs a corresponding resolution by using the corresponding EDID data, and the DPCD data can determine a rate and a number of signal lines used by the DP signal. Specifically, the auxiliary signal AUX processing module 290 may be connected to the second CC control module 243-2 to obtain EDID data and DPCD data.

After the auxiliary signal AUX processing module 290 obtains the EDID data and the DPCD data, it may generate an adjustment signal and transmit the adjustment signal to the HDMI signal conversion module 241, specifically, the adjustment signal is transmitted to the signal conversion module 241-3 and the signal transmission module 241-4, and is used to control the Type-C interface 230 to output the resolution and the DP signal rate matched with the target device 250, so as to implement better compatibility.

Therefore, the signal transmission device provided by the embodiment of the application comprises a high-definition multimedia HDMI interface, a 3.0 version universal serial bus USB3.0 interface, a Type-C interface and a signal transmission chip, wherein the input end of the HDMI interface is connected with a device for outputting HDMI signals, the output end of the HDMI interface is connected with the signal transmission chip, so that the HDMI signals are converted into standard video interface DP signals by using the signal transmission chip, the input end of the USB3.0 interface is connected with a device for outputting USB3.0 signals, the output end of the USB3.0 interface is connected with the signal transmission chip, and the signal transmission chip outputs DP signals, USB3.0 signals or combined signals of the DP signals and the USB3.0 signals by using the Type-C interface. Therefore, compared with 3 chips, the HDMI signal can be converted into the DP signal by using an independent signal transmission chip, namely, the HDMI interface is converted into the Type-C interface, and a highly integrated signal transmission chip is used, so that the cost is low, the power consumption is low, and the debugging difficulty is low. In addition, the signal transmission chip provided by the embodiment of the application comprises a data selector MUX module which has a signal amplification function on the USB3.0 signal, so that the attenuation of USB3.0 signals caused by USB3.0 consumables can be compensated. In addition, the signal transmission device is also provided with a power adapter which can supply power to the signal transmission chip and the target equipment, the power can reach 100 watts at most, and the target equipment can be designed without a power supply, so that the target equipment can be designed to be thinner and lighter.

The foregoing is merely a preferred embodiment of the present application and, although the present application discloses the foregoing preferred embodiments, the present application is not limited thereto. Those skilled in the art can now make numerous possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the claimed embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still fall within the protection scope of the technical solution of the present application without departing from the content of the technical solution of the present application.

Claims

1. A signal transmission apparatus, characterized in that the apparatus comprises: the device comprises a high-definition multimedia HDMI interface, a 3.0 version universal serial bus USB3.0 interface, a Type-C interface and a signal transmission chip;

2. The signal transmission apparatus according to claim 1, wherein the signal transmission chip comprises: the HDMI signal conversion module, the data selector MUX module and the configuration channel CC control module;

3. The signal transmission apparatus according to claim 2, wherein the data selector MUX module is further configured to perform signal amplification on the received USB3.0 signal.

4. The signal transmission apparatus of claim 2, wherein the configuration channel CC control module comprises a first CC control module and a second CC control module, the first CC control module is configured to determine that the data selector MUX module outputs the DP signal and/or the USB3.0 signal;

the device further comprises: a power adapter and a power supply module;

5. The signal transmission device according to claim 4, wherein the power supply module comprises a power switching circuit and a power step-down module;

6. The signal transmission device according to claim 5, wherein the signal transmission chip utilizes a bus expander GPIO to control whether the power switching circuit supplies the voltage and/or current output by the power adapter to the power supply voltage reduction module and the target device.

7. The signal transmission device according to claim 5, wherein the power step-down module comprises a primary step-down module and a secondary step-down module;

8. The signal transmission apparatus of claim 2, wherein the apparatus further comprises: an auxiliary signal AUX processing module;

9. The signal transmission device according to claim 8, wherein the HDMI signal conversion module comprises a signal receiving module, a data recovery module, a signal conversion module, and a signal transmitting module;

10. The signal transmission device according to claim 2, wherein the data selector MUX module is connected to the input end of the Type-C interface by a differential signal line;