WO2022052801A1

WO2022052801A1 - Data transmission apparatus and method

Info

Publication number: WO2022052801A1
Application number: PCT/CN2021/114192
Authority: WO
Inventors: 陈林
Original assignee: 陈林
Priority date: 2020-09-08
Filing date: 2021-08-24
Publication date: 2022-03-17
Also published as: CN114158137A

Abstract

The present application provides a data transmission apparatus and method. The data transmission apparatus is provided with a microcontroller, a power supply, a data transmission module, a TypeC interface, and a vibration sensor. Once the vibration sensor detects that the data transmission apparatus is moved by a user, the microcontroller controls the power supply to supply power to the data transmission module, such that the data transmission module is powered on and started before the data transmission apparatus is connected to an external computer; after the data transmission apparatus is connected to the external computer, the data transmission apparatus receives, by means of the TypeC interface, media data in a DP protocol format transmitted from the external computer; the media data is processed and then sent, by means of a wireless channel, to a display device for display. Therefore, the response efficiency of the data transmission apparatus is improved.

Description

Data transmission device and method

technical field

The present application relates to the field of communication technologies, and in particular, to a data transmission device and method.

Background technique

In the traditional technology, after the screen-casting device (for example, ClickShare) is connected to the external computer, the external computer supplies power to the screen-casting device, but the data transmission module in the screen-casting device is connected between the screen-casting device and the external computer. The configuration process such as initialization can be started only after the power is turned on. After a period of configuration is completed, the data transmission module starts to work, which makes the configuration time of the screen projection device time-consuming and reduces the response speed and work efficiency of the screen projection device.

SUMMARY OF THE INVENTION

The present application provides a data transmission device and method, which are used to solve the technical problems of slow response and low work efficiency of screen projection equipment in the prior art.

In the data transmission device and method provided by the embodiments of the present application, the data transmission device includes a power supply, a microcontroller, a communication interface, a vibration sensor, a controllable switch and a data transmission module, the communication interface is a TypeC interface, the data transmission The transmission module includes a Wi-Fi module and a microprocessor, the microprocessor is connected to the TypeC interface; the controllable switch is connected between the power supply and the data transmission module; the TypeC interface Used to receive media data in DP protocol format sent by an external computer; the vibration sensor is used to generate detection data according to the movement of the data transmission device, and the detection data carries the acceleration value of the vibration sensor itself;

The data transmission module is used to receive the media data transmitted from the TypeC interface, process the media data, and send it to the display device; the media data is the media data in the DP protocol format or the The video data in MIPI format and/or the audio data in I2S format generated after the media data in the DP protocol format is processed; the microcontroller is used to control the controllable control according to the detection data of the vibration sensor and a preset acceleration threshold switch on and off.

In the data transmission device and method provided by the present application, when the vibration sensor detects that the user moves the data transmission device, the microcontroller controls the power supply to supply power to the data transmission module, so that the data transmission module starts before the data transmission device is connected to the external computer. After startup, after the data transmission device is connected to the external computer, the data transmission device receives the media data in the DP protocol format transmitted from the external computer through its TypeC interface, and sends it to the display device through the wireless channel after processing, which improves the performance of the data transmission device. response efficiency.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the schematic diagram of the application scenario of the application;

2 is a schematic structural diagram of a data transmission device in a technology;

3 is a schematic structural diagram of a data transmission device in another technology;

FIG. 4 is a schematic diagram of an application scenario framework of a data transmission device provided by an embodiment of the present application;

5 is a schematic diagram of a connection relationship between a microcontroller and a vibration sensor provided by an embodiment of the application;

6 is a schematic structural diagram of a vibration sensor provided by some embodiments of the present application;

FIG. 7 is a schematic structural diagram of a microcontroller according to some embodiments of the present application;

FIG. 8 is a schematic flowchart of a data transmission method provided by an embodiment of the present application;

FIG. 9 is a schematic flowchart of a data transmission method according to an embodiment of the present application;

10 is a schematic diagram of an application scenario framework of a data transmission device provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of an application scenario framework of a data transmission apparatus provided by an embodiment of the present application

12 is a schematic diagram of a charging management IC chip and peripheral circuits provided by some embodiments of the present application;

13 is a schematic diagram of a power chip and peripheral circuits provided by some embodiments of the present application;

14 is a schematic diagram of an application scenario framework of a data transmission device provided by an embodiment of the present application;

15 is a schematic structural diagram of a related circuit of a controllable switch and an AND gate circuit provided by some embodiments of the present application;

16 is a schematic diagram of a partial circuit structure of an external power detection module provided by some embodiments of the present application;

17 is a schematic flowchart of a control method of a data transmission device provided by an embodiment of the present application;

18 is a schematic diagram of an application scenario framework of a data transmission device provided by an embodiment of the present application;

19 is a schematic state diagram of a data transmission module according to some embodiments of the present application when a data transmission device control method is executed;

20 is a schematic diagram of an application scenario framework of a data transmission device provided by an embodiment of the present application;

21 is a schematic diagram of a partial circuit structure of an external power supply detection module provided by an embodiment of the application;

22 is a schematic state diagram of a microcontroller according to some embodiments of the present application when a method for controlling a data transmission device is executed;

23 is a schematic diagram of an application scenario framework of an embodiment of a data transmission device provided by the present application;

24 is a schematic diagram of an application scenario framework of an embodiment of a data transmission device provided by the present application;

25 is a schematic flowchart of a data transmission method provided by an embodiment of the application;

26 is a schematic diagram of an application scenario framework of a data transmission device provided by an embodiment of the present application;

27 is a schematic flowchart of an embodiment of a data transmission method provided by the present application;

28 is a schematic flowchart of an embodiment of a data transmission method provided by this application;

29 is a schematic structural diagram of another embodiment of the data transmission device provided by the application;

Figure 30 is a pinout diagram of the TypeC interface;

FIG. 31 is a schematic structural diagram of another embodiment of the data transmission apparatus provided by the present application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

FIG. 1 is a schematic diagram of the application scenario of the application, in which, taking the scenario where the user needs to share the presentation in the electronic device 1 as an example, the electronic device 1 can be an external computer. Due to the limitation of the screen size of the electronic device 1, the user can After the electronic device 1 is connected to the data transmission device 3 using the connecting line 2 , the data transmission device 3 projects the presentation screen displayed on the display interface of the electronic device 1 to the display device 4 hung on the wall for display.

Wherein, the electronic device 1 can also be a notebook computer, a tablet computer, an external computer, a desktop computer or a workstation, etc. with a display interface; data communication can be performed between the electronic device 1 and the data transmission device 3, for example, the electronic device 1 and data A connection line 2 may be provided between the transmission devices 3 to be connected to each other through wired communication. The connection line 2 may be a Universal Serial Bus (Universal Serial Bus, referred to as: USB) connection cable, a High Definition Multimedia Interface (High Definition Multimedia Interface, referred to as: HDMI) connection cable or a network cable or the like. In one embodiment, the USB cable may be a TypeC cable. In some embodiments, the connection line 2 can be integrated with the data transmission device 3 , that is, the connection line 2 and the data transmission device 3 together form an integral device. At this time, the connection line 2 can be regarded as a part of the data transmission device 3 In this way, when the user connects the data transmission device 3 to the electronic device 1, the step of connecting the data transmission device 3 to one end of the connecting wire 2 can be omitted, and the user only needs to connect the electronic device 1 to the other end of the connecting wire, thereby The efficiency is improved, and the situation that the data transmission device 3 cannot be connected to the electronic device 1 can be avoided because the connecting wire 2 cannot be found.

The data transmission device 3 and the display device 4 can be connected through wireless communication, the wireless communication includes but is not limited to: Wireless Fidelity (Wireless Fidelity, Wi-Fi), Bluetooth or other short-range wireless communication, etc.; in some implementations In an example, the data transmission device 3 may also be referred to as a screen projection device, a screen projection device, a wireless screen projection device, a screen transmission device or a wireless screen transmission device, etc., and the display device 4 may also be referred to as a large-screen tablet, etc., and the display device 4 The sharing of presentations in the electronic device 1 can be realized together with the data transmission device 3 . In some embodiments, the display device 4 can also independently implement functions such as remote instant communication and providing a writing canvas through a touch-sensitive panel.

Since the data transmission device 3 is connected to the electronic device 1 through a wired connection, the data transmission device 3 can be connected to the electronic device 1 through the connection line 2 after the electronic device 1 is connected to the data transmission device 3 without an external power supply. The data transmission device 3 is powered. For example, FIG. 2 is a schematic structural diagram of a data transmission device in a technology, wherein the data transmission device 3 includes: a communication interface 31 and a data transmission module 32, and the data transmission module 32 can be connected to the connection line 2 through the communication interface 31. Then, the data transmitted by the electronic device 1 is received. When the connection line 2 is a USB connection line, the communication interface 31 can be a TypeC interface, and the TypeC interface can be compatible with USB and Type-C data, that is, the TypeC interface can transmit DP data and also transmit USB data. Correspondingly, the electronic device 1 may also provide a USB interface, so that after the USB connection line 2 establishes the connection between the electronic device 1 and the two USB interfaces of the data transmission device 3, the connection between the electronic device 1 and the data transmission device 3 is established. . Since the USB connection line can transmit both data and power, the electronic device 1 can provide data and power to the data transmission module 32 through the connection line 2 and the communication interface 31 in turn, so that the data transmission module 32 and the communication interface 31 are connected between the data transmission module 32 and the communication interface 31. There are at least two connection logics of data connection and power connection. For example, the data transmission module 32 can receive the power transmitted from the electronic device 1 through the path ① in the figure, and can also receive the power from the electronic device through the path ② in the figure. 1 After transmitting the data of the display interface, the display interface is projected to the display device 4 for display through wireless communication. The data transmission module 32 may include a Wi-Fi module and a microprocessor, and the microprocessor is connected to the TypeC interface. For specific implementations, please refer to FIG. 29 , FIG. 30 and FIG. 31 in the embodiment of the present invention. When the communication interface of the data transmission device 3 is a TypeC interface, the structure of the data transmission module 32 of the data transmission device 3, the connection between the data transmission module 32 and the TypeC interface, and the structure and implementation of the peripheral circuit are specifically described.

In the data transmission device 3 shown in FIG. 2 , since the power required for the data transmission module 32 to complete the startup and the projection of the display interface is completely provided by the electronic device 1 , the electronic device 1 needs to send the data to the electronic device 1 through the connecting line 2 at the same time. The data transmission module transmits data and power, and the data transmission module 32 is in a shutdown state because there is no input power when the data transmission device 3 is not connected to the electronic device 1 . After the user connects the electronic device 1 and the data transmission device 3 through the connecting line 2, the data transmission module 32 cannot immediately receive data and perform operations such as projection of the display interface, but needs to first receive power through the path ① for data transmission. The data transmission module 32 can only receive data through the path ② after operations such as startup, initialization, and communication configuration of the transmission module 32 make the data transmission module 32 switch from the shutdown state to the working state. It can be understood that the moment when the electronic equipment 1 and the data transmission device 3 are connected through the connecting line 2 is recorded as the first moment, and the moment when the data transmission module 32 is switched from the shutdown state to the working state is recorded as the second moment, then. Between the first time and the second time, even if the electronic device 1 transmits the data of the display interface to the data transmission module 32 through the path ②, the data transmission module 32 cannot project the display interface to the display device 4 for display. Only when the data transmission module 32 is switched to the working state, that is, after the data transmission module 32 is ready for screen projection, after the second moment, the data of the display interface transmitted by the electronic device 1 to the data transmission module through the path ② is It can be received by the data transmission module 32 through the path ② and projected to the display device 4 for display. When the user starts to use the data transmission device 3 and connects the data transmission device 3 with the electronic device 1, the intuitive feeling caused to the user is that when the electronic device 1 and the data transmission device 3 are connected through the connecting line 2 (the first moment). ), it is necessary to wait 10 to 20 seconds (until the second time) before the display interface projected by the electronic device 1 can be seen on the display device 4, and during the waiting time of 10 to 20 seconds The display interface of the electronic device 1 cannot be projected onto the display device 4 by the data transmission device 3, which reduces the response speed and work efficiency when the data transmission device 3 performs screen projection, and affects the user experience.

In the data transmission device, a separate power supply can also be used to keep the data transmission module in the data transmission device in a working state, so as to improve the response speed of the data transmission device to the projection of the input display interface. For example, FIG. 3 is a schematic structural diagram of a data transmission device in another technology, wherein, in addition to the communication interface 31 and the data transmission module 32 in the data transmission device 3, a power supply for supplying power to the data transmission module 32 is also specially set 33, when the communication interface 21 in the data transmission device 3 is not connected with the electronic equipment 1, the power supply 33 set in the data transmission device 3 provides power to the data transmission module 32 through the path ③, so that the data transmission module 32 is in the data transmission module 32. When the transmission device 3 is not connected to the electronic device 1 through the connecting wire 2, it can still maintain the working state. After the user connects the electronic device 1 and the communication interface 31 of the data transmission device 3 through the connecting line 2 (recorded as the first time), the data transmission module 32 can start to pass the path after the first time because the data transmission module 32 is always in the working state. ②Receive the data of the display interface of the electronic device 1, and project the display interface to the display device 4 for display. After the user connects the electronic device 1 and the data transmission device 3 through the connecting line 2, the projected display interface of the electronic device 1 can be quickly seen on the display device 4, which improves the response speed and work efficiency, and provides users with Come to the intuitive feeling of "plug and play".

However, although the data transmission device 3 shown in FIG. 3 improves the response speed and work efficiency, in order to keep the data transmission module 32 in the data transmission device 3 in a working state at any time, to extend the data transmission device 3 as much as possible to achieve " The battery life of the "plug and play" function, the capacity and volume of the power supply 33 in the data transmission device 3 are relatively large, occupying a large amount of space in the data transmission device 3, and seriously affecting the internal layout and external appearance of the data transmission device 3. design.

To sum up, the data transmission device shown in Figure 2 has the problems of slow response speed and low work efficiency, and the data transmission device shown in Figure 3 has the shortage of equipment space and capacity, and how to take into account the space and efficiency, Under the condition that the power supply in the data transmission device does not need excessive capacity and volume, it can also improve the response speed and work efficiency of the data transmission device when transmitting data, which is a technical problem to be solved urgently in the art.

Therefore, the present application provides a data transmission method and a data transmission device. The data transmission device is provided with a microcontroller and a vibration sensor. When the data transmission device is not connected to the electronic device, when the vibration sensor does not detect that the user moves the data transmission device, the microcontroller will not control the power supply to supply power to the data transmission module through the controllable switch, so that the data transmission module is not powered And keep the shutdown state; only when the vibration sensor detects that the user moves the data transmission device (for example, when the user picks up the data transmission device), then the microcontroller controls the power supply to supply power to the data transmission module through the controllable switch, so that the data transmission The module starts to start before the data transmission device is connected to the electronic equipment, and starts to switch from the shutdown state to the working state, so as to improve the response speed and work efficiency of the data transmission device, and at the same time, the power supply does not need to supply power to the data transmission module all the time. At the same time, the capacity and volume of the power supply are reduced. Optionally, the microcontroller in the data transmission device may be in a standby state when the vibration sensor does not detect that the user moves the data transmission device, wherein the power consumption of the microcontroller in the standby state is less than that in the normal working state, In order to save the power consumption of the microcontroller itself, the microcontroller can be powered by the power supply in the data transmission device. And when the microcontroller is in the standby state, only when the vibration sensor detects that the user moves the data transmission device (for example, when the user picks up the data transmission device), the microcontroller is woken up, switched from the standby state to the working state, and then the microcontroller The controller controls the power supply to supply power to the data transmission module through the controllable switch, so that the data transmission module starts to start before the data transmission device is connected with the electronic equipment.

The technical solutions of the present application will be described in detail below with specific examples. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

FIG. 4 is a schematic diagram of an application scenario framework of the data transmission device provided by an embodiment of the present application. The electronic device 1, the connecting line 2, the data transmission device 3 and the display device 4 shown in FIG. In the scenario, specifically, the data transmission device 3 provided in this embodiment includes: a communication interface 31 , a data transmission module 32 and a power supply 33 . The module 32 can receive the power transmitted from the electronic device 1 through the path ① in the figure, and can also receive the data from the display interface transmitted by the electronic device 1 through the path ② in the figure, and communicate with the display device 4 through wireless communication. Data communication is carried out, which includes projecting the display interface to the display device 4 for display. When the communication interface 31 in the data transmission device 3 is not connected to the electronic device 1, the power supply 33 can provide power to the data transmission module 32 through the path ③, so that the data transmission module 32 is in a working state. However, in this embodiment, the The power supply 33 does not always provide power to the data module 32 through the path ③, but supplies power to the data module according to the on state or off state of the controllable switch 36 connected between the power supply 33 and the data transmission module 32. 32 provides electrical energy. Wherein, when the controllable switch 36 is turned on, the power supply 33 can transmit power to the data transmission module 32 through the controllable switch 36, and when the controllable switch 36 is turned off, the power supply 33 cannot pass the controllable switch 36 to the data transmission module. 32 powered.

In this embodiment, the on-off control of the controllable switch 36 is realized through the microcontroller 34 and the vibration sensor 35 . Specifically, the vibration sensor 35 inside the data transmission device 3 The movement conditions generate detection data, which can be sent to the microcontroller 34 . For example, the vibration sensor 35 is an acceleration sensor in this embodiment, and the vibration sensor 35 generates detection data according to the movement of the data transmission device, and the detection data includes at least the acceleration value of the vibration sensor 35 itself. The microcontroller 34 can control the controllable switch 36 between the power supply 33 and the data transmission module 32 to be turned on or off according to the detection data generated by the vibration sensor 35, thereby controlling whether the power supply 33 passes the path ③ to the data transmission module 32. Provide power. That is to say, although the data transmission device 3 in this embodiment is provided with a power supply 33 connected to the data transmission module 32, whether the power supply 33 provides power to the data transmission module 32 is determined by the microcontroller 34 according to the vibration sensor. 35 detection data to control.

It should be noted that the data transmission device 3 is usually placed on the table in the conference room, and the table will be subjected to various external forces to generate large or small vibrations. In a possible scenario, due to the high sensitivity of the vibration sensor, The data transmission device 3 will be slightly moved and accidentally triggered, so that the vibration sensor will generate useless signals. In order to filter out these useless signals, the microcontroller 34 can store the preset acceleration threshold by pre-storing the acceleration threshold. The device 34 receives the detection data sent by the vibration sensor 35 and carries the acceleration value of the vibration sensor 35 itself. When the microcontroller 34 determines that the acceleration value of the vibration sensor 35 itself exceeds the pre-stored acceleration threshold, the control power supply 33 and the data transmission module 32 are connected between the The controllable switch 36 is turned on, so that the power supply 33 provides power to the data transmission module 32 through the path ③; or, in another possible implementation, the vibration sensor 35 can also pre-store an acceleration threshold, and the vibration sensor 35 determines that in the detection data When the acceleration value exceeds the pre-stored acceleration threshold, the vibration sensor 35 sends an interrupt signal to the microcontroller 34, and when the microcontroller 34 receives the interrupt signal, the controllable switch 36 between the control power supply 33 and the data transmission module 32 is turned on , so that the power supply 33 provides power to the data transmission module 32 through the path ③.

Optionally, in some embodiments, the vibration sensor 35 may specifically be an acceleration sensor provided in the data transmission device 3 , and the acceleration sensor may obtain the current data transmission device 3 in the three reference axes according to the movement of the data transmission device 3 . The real-time acceleration values in a total of six directions are negative, and the real-time acceleration values in these six directions can be used as the detection data generated by the vibration sensor 35 . More specifically, FIG. 5 is a schematic diagram of a connection relationship between a microcontroller and a vibration sensor provided by an embodiment of the application, wherein the connection relationship between the microcontroller 34 and the vibration sensor 35 includes at least I2C (Inter-Integrated Circuit). Connection and/or Interrupt (abbreviation: INT) connection. The connection relationship may be a plurality of physical connection lines or an integrated connection line, and the specific implementation of the connection relationship is not limited in this application. ), the connection relationship may be a conductive line printed on the circuit board. The microcontroller 34 can initialize the vibration sensor 35 through the I2C connection, and the microcontroller 34 can also read the detection data of the vibration sensor 35 through the I2C connection. At this time, the microcontroller 34 needs to actively obtain the vibration sensor 35 detection data. The vibration sensor 35 can send an interrupt (INT for short) signal to the microcontroller through the INT connection. The I2C connection and the INT connection between the microcontroller 34 and the vibration sensor 35 as shown in FIG. 5 can be set at the same time, or the I2C connection is set when only the I2C signal is transmitted between the microcontroller 34 and the vibration sensor 35, or The INT connection is set when only the INT signal is transmitted between the microcontroller 34 and the vibration sensor 35 .

Optionally, the power supply 33 in the data transmission device 3 provided in this embodiment may also be used to supply power to the microcontroller 34 . In one embodiment, the microcontroller 34 may have two power consumption states, a first power consumption operating state and a second power consumption operating state, respectively. Before the microcontroller 34 receives the detection data or the interrupt signal, the microcontroller 34 is in the first power consumption working state under the power supply of the power supply of the data transmission device 3; after the microcontroller 34 receives the detection data or the interrupt signal, it is in the second power consumption state. Power consumption working state. In some application scenarios, the power consumption of the microcontroller 34 in the first power consumption working state is lower than that in the second power consumption working state. Specifically, the first power consumption working state may be a low power consumption working state , the second power consumption working state may be a high power consumption working state. The microcontroller 34 can be selected as a micro control unit (Micro Control Unit, MCU for short) with a low power consumption working state. When the microcontroller 34 is in a standby state, the microcontroller 34 can be maintained in a low power consumption state, and its work The current can be limited to uA level, so as to minimize the power consumption of the power supply 33 by the microcontroller 34 itself when the data transmission device 3 is not connected to the electronic device 1 .

Exemplarily, FIG. 6 is a schematic structural diagram of a vibration sensor provided by some embodiments of the application, wherein the vibration sensor can be selected as an acceleration sensor chip of type “LIS3DHTR”, and FIG. 7 is a schematic diagram of a vibration sensor provided by some embodiments of the application. A schematic diagram of the structure of a microcontroller, wherein the microcontroller can be selected as an MCU chip of the model "STM32L011D3P6". Combined with the examples shown in Figure 6 and Figure 7, the INT1 pin of the vibration sensor is connected to the PC15/OSC32_OUT pin of the microcontroller to achieve the "INT connection" shown in Figure 5. The vibration sensor can be connected to the micro controller through the INT1 pin. The PC15/OSC32_OUT pin of the controller sends an interrupt signal. The SCL/SPC pin of the vibration sensor is connected to the PA9/I2C1_SCL/USART2_TX pin of the microcontroller, and the SDA/SDI/SDO pin of the vibration sensor is connected to the PA10/I2C1_SDA/USART2_RX pin of the microcontroller. The "I2C connection" shown, the vibration sensor can send I2C data (I2C serial data) to the PA10/I2C1_SDA/USART2_RX pin of the microcontroller through the SDA/SDI/SDO pin, and the vibration sensor can send the micro-controller through the SCL/SPC pin. The PA9/I2C1_SCL/USART2_TX pin of the controller sends the I2C clock signal (I2C serialclock), etc. It should be noted that, FIG. 6 and FIG. 7 only show a possible selection of the microcontroller and the vibration sensor in the embodiment of the present application, and the present application does not limit the specific implementation of the microcontroller and the vibration sensor.

Optionally, the controllable switch 36 provided in this embodiment may be a switch tube such as a triode, a field effect transistor, etc., and the controllable signal sent by the microcontroller 34 to the control terminal of the controllable switch 36 may be a high level or low level. Exemplarily, when the controllable switch 36 is a field effect transistor, the control terminal of the field effect transistor is the gate, and the source and drain are respectively connected to the data transmission module 32 and the power supply 33. At this time, when the gate of the field effect transistor receives A signal in the form of a high level (corresponding to the N-channel type) or a low level (corresponding to the P-channel type) is denoted as the first turn-on signal, the first turn-on signal can make the field effect transistor close, and the field effect transistor source The power supply 33 can supply power to the data transmission module 32 through the controllable switch 36; and when the field effect transistor receives a low level (corresponding to the N-channel type) or a high level (corresponding to the P-channel type) Type) form signal, denoted as the first off signal, the first off signal can control the FET to turn off, the source and drain of the FET are turned off, and the power supply 33 will not transmit to the data transmission module 32. powered by.

In the embodiment of the present application, the data transmission device 3 is provided with a power supply interface, the power supply interface is used to connect the power supply 33 , and the power supply 33 can provide power to the data transmission module 32 through the power supply interface. In some embodiments, the power supply 33 in the data transmission device 3 may include a non-removable battery, and the battery is connected to the data transmission module 32 through the power interface in the data transmission device 3 , so that the battery can provide the data transmission module 32 electrical energy. In some embodiments, the power supply 33 in the data transmission device 3 may include a detachable battery. When the data transmission device 3 is equipped with a battery, the battery is connected to the data transmission module 32 through the power interface in the data transmission device 3 , so that the battery can provide power for the data transmission module 32 .

Then, when the above-mentioned data transmission device 3 transmits data to the display device 4, for example, when the screen is projected to the display device 4, the microcontroller 34 can determine whether the power supply 33 provides power to the data transmission module 32 according to the detection data of the vibration sensor 35. Control, for example, FIG. 8 is a schematic flowchart of a data transmission method provided by an embodiment of the present application, which can be used for execution by the data transmission device 3 shown in FIG. 4 . When the data transmission device 3 is not connected to the electronic device 1, the Methods include:

S101: The microcontroller 34 receives detection data sent by the vibration sensor 35, where the detection data carries the acceleration value of the vibration sensor 35 itself.

Specifically, when the microcontroller 34 controls the data transmission device 3 , it first needs to acquire the detection data obtained by the vibration sensor 35 to detect the movement of the data transmission device 3 . The detection data includes at least the acceleration value of the vibration sensor itself. In this embodiment, the vibration sensor 35 is an acceleration sensor, and the acceleration sensor will detect the motion state of the movement of the data transmission device 3 in real time, and generate acceleration data in six directions (for example, the acceleration data detected in a certain embodiment are 0 mg, 200 mg, and 100 mg). , 150mg, 0mg, 400mg). The microcontroller 34 can obtain the detection data detected by the vibration sensor 35 in real time through the connection with the vibration sensor 35 at regular intervals; or, the vibration sensor 35 can send the detection data detected in real time to the microcontroller 34 at regular intervals. .

S102 : When the microcontroller 34 determines that the acceleration value of the vibration sensor 35 itself exceeds a preset acceleration threshold, the microcontroller 34 sends a first conduction signal to the controllable switch 36 .

The microcontroller 34 may store the preset acceleration threshold by means of pre-storing the acceleration threshold. Subsequently, the microcontroller 34 determines whether the acceleration value of the vibration sensor 35 itself received from the vibration sensor 35 exceeds the acceleration threshold. If so, it means that the data transmission device 3 has moved, possibly because the user is about to connect the electronic device through the connecting line 2 1 and the data transmission device 3, the data transmission device 3 has been moved; if not, it means that the data transmission device 3 has not moved and is in a stationary state. For example, assuming that the pre-stored acceleration threshold value of the microcontroller 34 is 350 mg (mg is the unit of the acceleration sensor, the resolution of the G-Sensor), when the acceleration value of the vibration sensor 35 itself acquired by the microcontroller 34 is the acceleration value of the six directions is (0mg, 200mg, 100mg, 150mg, 0mg, 400mg), and the acceleration value of 400mg in one direction exceeds the acceleration threshold of 350mg, then the microcontroller 34 sends the first conduction signal to the controllable switch 36 . Among them, when the acceleration value of the vibration sensor 35 exceeds the acceleration threshold in any direction, it means that the data transmission device 3 has moved in this direction. Therefore, the microcontroller 34 only needs to determine that the acceleration value in at least one direction exceeds the acceleration threshold. Both send a first turn-on signal to the controllable switch 36 .

S103 : The controllable switch 36 is closed according to the first conduction signal to conduct the power supply connection between the power supply 33 and the data transmission module 32 .

The controllable switch 36 is closed according to the first conduction signal to conduct the power supply connection between the power supply 33 and the data transmission module 32 , and the power supply 33 supplies power to the data transmission module 32 through the controllable switch 36 .

S104: The data transmission module 32 performs communication configuration.

Specifically, after the power supply connection between the power supply and the data transmission module is turned on, the power supply 33 supplies power to the data transmission module 32, so that the data transmission module 32 can start to perform a communication configuration after being powered on, and the communication configuration includes: communication The communication configuration of the interface 31 ; and/or the communication configuration of the data transmission module 32 to perform data communication with the display device 4 .

In order to avoid the problem of high power consumption between the microcontroller 34 and the vibration sensor 35 due to the frequent sending and receiving of detection data between the microcontroller 34 and the vibration sensor 35, in another implementation, the vibration sensor 35 determines the detection data Whether the self-acceleration value reaches the preset acceleration threshold value, when the vibration sensor 35 judges that the self-acceleration value reaches the preset acceleration threshold value, it can be sent to the microcontroller 34 through the INT connection set between the microcontroller 34 and the vibration sensor 35 The interrupt signal enables the microcontroller 34 to control the on-off of the controllable switch 36 according to whether the interrupt signal is received.

Specifically, FIG. 9 is a schematic flowchart of a data transmission method provided by an embodiment of the application, which can be used for execution by the data transmission device 3 shown in FIG. 4 . It can be understood that the data transmission device shown in FIG. 4 3 can be configured to perform any one of the data transmission methods in the embodiments shown in FIG. 8 or FIG. 9; According to the instructions or settings of the user of the data transmission device 3, any one of the data transmission methods is executed, thereby enriching the functions of the data transmission device 3, allowing the user to flexibly select and set, thereby improving the user experience.

Specifically, as shown in the data transmission method shown in FIG. 9, when the data transmission device 3 is not connected to the electronic device 1, the method includes:

S201: The vibration sensor 35 generates detection data according to the movement of the data transmission device 3, wherein the detection data includes at least the acceleration value of the vibration sensor 35 itself.

S202: When the vibration sensor 35 determines that the acceleration value of the vibration sensor 35 itself exceeds the acceleration threshold, it sends an interrupt signal to the microcontroller 34.

Specifically, in this embodiment, the vibration sensor 35 will continuously generate detection data carrying its own acceleration value at preset time intervals, and will not directly send the detection data to the microcontroller 34 after each generation of detection data. , but compare the acceleration value in the detected data with a preset acceleration threshold; wherein, in some embodiments, the preset acceleration threshold may be pre-stored in the vibration sensor 35 by sending an instruction from the microcontroller 34, and In other embodiments, the vibration sensor 35 may also preset the trigger threshold of the vibration sensor 35 as the preset acceleration threshold by means of hardware parameters of the peripheral hardware circuit of the vibration sensor 35 . When the acceleration value in the detection data generated by the vibration sensor 35 does not exceed the preset acceleration threshold, the vibration sensor 35 does not perform other operations, but continues to generate detection data at intervals; When the acceleration value in the detected data exceeds the preset acceleration threshold, it means that the data transmission device 3 has moved, and the vibration sensor 35 can send an interrupt signal to the microcontroller 34 through the INT connection with the microcontroller 34 .

S203 : After the microcontroller 34 receives the interrupt signal, the microcontroller 34 sends a first turn-on signal to the controllable switch 36 .

For the microcontroller 34, after receiving the interrupt signal sent by the vibration sensor 35 through the INT connection in S202, it sends a first turn-on signal to the controllable switch.

S204: The controllable switch 36 is closed according to the first conduction signal, and the power supply connection between the power supply 33 and the data transmission module 32 is turned on.

Finally, the controllable switch 36 is closed according to the first conduction signal, and the power supply connection between the power supply 33 and the data transmission module 32 is turned on, and the power supply 33 supplies power to the data transmission module 32 through the controllable switch 36 .

S205: The data transmission module 32 performs communication configuration.

To sum up, in the data transmission device provided by the embodiments of the present application, a vibration sensor for detecting whether the data transmission device is moving is set in the data transmission device, and the switch between the power supply and the data transmission module can be controlled according to the detection data of the vibration sensor. A microcontroller that controls the switch to be turned on so that the power supply can supply power to the data transmission module. Only when the microcontroller detects the movement of the data transmission device according to the vibration sensor, will the controllable switch between the power supply and the data transmission module be turned on. , so that the power supply supplies power to the data transmission module. Therefore, when the data transmission device in this embodiment is not in use, the power supply may not supply power to the data transmission module; and when the user uses the data transmission device in this embodiment, once it is detected that the user moves the data transmission device ( Denoted as time T0), which means that the user may be about to connect the electronic equipment with the data transmission device through the connecting line, and at time T0 the microcontroller controls the power supply to supply power to the data transmission module, so that the data transmission module is connected between the data transmission device and the data transmission module. Before the electronic device is connected, it starts to start and performs communication configuration. Assuming that the data transmission module completes configuration operations such as communication configuration at time T1, for users using the data transmission device, if the user connects the electronic device to the electronic device at time T2 after time T1 The data transmission device is connected by a connecting line, and since the data transmission module in the data transmission device has completed the configuration operations such as communication configuration, it can start to receive the data of the display interface sent by the electronic device from the communication interface after time T2 and project it to the display interface. On the display device; if the user connects the electronic device and the data transmission device through a connecting line at time T3 between time T0-T1, the process from the user picking up the data transmission device to inserting the electronic device is shorter, but also It is only necessary to wait for the time between time T3 and time T1. After the data transmission module completes configuration operations such as communication configuration at time T1, the data transmission module can receive the display interface data sent by the electronic device from the communication interface. and cast to the display device.

Compared with the data transmission device shown in FIG. 2 , the data transmission device provided in this embodiment, because the data transmission module starts to start before the data transmission device is connected to the electronic device, reduces the waiting time of the user when using the data transmission device , ideally, no waiting time is required, so the response speed and work efficiency of the data transmission device are improved; compared with the data transmission device shown in The movement detection module actually detects that the user may have moved the data transmission device, and then controls the power supply to supply power to the data transmission module, thereby reducing the need for the power supply to provide power to the data transmission module, and can reduce the amount of power set in the data transmission device. The capacity and volume of the power supply. To sum up, the data transmission device provided by the present application can take into account both space and efficiency, and can also improve the response speed and work efficiency of the data transmission device during data transmission when the power supply in the data transmission device does not require excessive capacity and volume. . In addition, in the data transmission device provided in this embodiment, a controllable switch is set between the power supply and the data transmission module, and whether the power supply supplies power to the data transmission module can be controlled by turning on and off the switch, so that a relatively simple The circuit structure realizes the control of the power supply by the microcontroller.

Optionally, in the above data transmission device 3 shown in FIG. 4 , the power supply 33 directly supplies power to the data transmission module 32 and the microcontroller 34 as an example. Similarly, when the data transmission device 3 is connected through the communication interface 31 After the electronic device 1 is installed, the electrical energy provided by the electronic device 1 also directly supplies power to the data transmission module 32 and the microcontroller 34 through the communication interface 31 . The power source 33 may be a battery that can be charged and discharged in the data transmission device 3, and then the timing of charging and discharging the battery needs to be controlled. Therefore, in a possible specific implementation of the power source 33, FIG. 10 is a schematic diagram of an application scenario framework of a data transmission device provided by an embodiment of the present application. In the data transmission device shown in FIG. 10 , based on the embodiment shown in FIG. 4 , the power supply 33 may specifically include a power management module 331 and The battery 332, wherein the battery 332 is used to store electrical energy, the battery 332 set in the data transmission device in this embodiment can be a lithium battery, for example, the power consumption can be selected below 1mA, and the capacity is between 50-100mAH; the power management module 331 The communication interface 31 and the battery 332 are connected, and the power management module 331 performs electric energy charge and discharge management on the battery 332 according to the electric energy from the electronic device 1 obtained by the communication interface 31 . The battery 332 supplies power to the microcontroller 34 and the data transmission module 32 through the power management module 331 .

Specifically, the power management module 331 may include an IC (Integrated Circuit, integrated circuit) chip for performing charge and discharge management of the battery 332 . When the data transmission device 3 is connected to the electronic device 1 through the connecting line 2, the electronic device 1 transmits power to the communication interface 31 through the connecting line 2, and the power management module 331 can transmit the power received by the communication interface 31 to the battery 332 as a battery 332 charge. When the data transmission device 2 is not connected to the electronic device 1, the power management module 331 can control the battery 332 to output power, so that the power output by the battery 332 is transmitted to the microcontroller 34 to supply power, and is transmitted to the data transmission through the path ③ in FIG. 10 Module 32 is powered.

Further, FIG. 11 is a schematic diagram of an application scenario framework of the data transmission device provided by an embodiment of the application. The data transmission device shown in FIG. 11 is based on the embodiment shown in FIG. The management module 331 may specifically include a charge management IC chip 3311 and a power supply chip 3312, and the power supply chip 3312 may be a DC-DC converter (DC to DC converter) or an LDO (low dropout regulator, low dropout linear regulator), It is used to convert the voltage provided by the power supply 322 (typically 3.5V-4.2V) into a suitable voltage (eg, 3.3V) to power the microcontroller 34 . The charging management module is specifically used to manage the battery 332 when it is being charged, and the electrical energy transmitted by the electronic device 1 is received through the communication interface 31 to charge the battery 332. When the battery 332 is a lithium battery, it can convert the direct current into a constant current output power supply. The battery 332 is charged, and when discharged, power is supplied to the data transmission module 32 through the path ③, and power is supplied to the microcontroller 34 through the power chip 3312 .

Exemplarily, FIG. 12 is a schematic diagram of a charge management IC chip and peripheral circuits provided by some embodiments of the application, wherein the charge management IC chip can be selected as a power management chip of the model "SY6952B", wherein the " The IN" pin is connected to the communication interface 31, and the power VBUS transmitted by the electronic device 1 can be received through the communication interface 31. The "LX" pin of the charge management IC chip is connected to the battery B1, and the charge management IC chip can be used to control the slave "IN" tube. The power VBUS received by the pin charges the battery 1. 13 is a schematic diagram of a power supply chip and peripheral circuits provided by some embodiments of the application, wherein the power supply chip can be selected as a power supply chip of the model "LC1458CB5TR33", wherein the VIN pin of the power supply chip is connected to the power VBAT provided by the battery, and the VOUT tube The pin is connected to the power supply pin of the microcontroller 34 , and the power supply chip can be used to convert VBAT into a voltage suitable for the operation of the microcontroller, such as (3.3V), and provide it to the microcontroller 34 . It should be noted that, FIG. 12 and FIG. 13 only show a possible selection of the charging management IC chip and the power supply chip in the embodiment of the present application, and the specific implementation of the charging management IC chip and the power supply chip is not limited in the present application. .

To sum up, the data transmission device provided in this embodiment, on the basis of the data transmission device in the previous embodiment, further refines the structure of the power supply, and the management module provided in the power supply controls the charging and discharging of the battery. After the transmission device is connected to the electronic device, the electrical energy provided by the electronic device to the data transmission device can be charged to the battery, so that after the subsequent data transmission device is disconnected from the electronic device, the battery can be used to charge the microcontroller and the micro-controller in the data transmission device. The data transmission module and the like are used to supply power, thereby increasing the battery life of the power supply in the data transmission device, and since the battery can be charged, the requirements for the battery capacity can be further reduced.

In some embodiments, please refer to FIG. 11 , when the data transmission device 3 is inserted into the external electronic device 1, the power supply pin of the interface of the electronic device 1 provides power to the data transmission device 3. The battery 332 of the transmission device 3 has a higher voltage, so the power supply of the electronic device 1 can directly charge the battery 332 through the path of “communication interface 31-controllable switch 36-battery 332”. Because the charging current and/or charging voltage is not processed by the power management module 331 (see the above for the processing, for example, including converting the output voltage and/or output current of the electronic device into a suitable output voltage and/or output current) , the charging current and/or charging voltage is too high or too low, so that the battery 332 may be damaged. Therefore, in order to prevent the power supply of the electronic device 1 from directly charging the battery 332 of the data transmission device 3, an external power supply detection module can be provided, and the external power supply detection module can detect whether the data transmission device 3 is provided with working power by the electronic device 1, and if so, Then, the external power detection module sends a level signal to the controllable switch 36 to indicate that the controllable switch 36 is disconnected. Since the controllable switch 36 is turned off, the power supply of the electronic device 1 cannot directly charge the battery 332 through the path of "communication interface 31 - controllable switch 36 - battery 332 ".

Therefore, on the basis of the above embodiments shown in FIGS. 4-13 , in some embodiments, the data transmission device 3 further includes an external power detection module, and the external power detection module is used to detect the communication in the data transmission device 3 Whether the interface 21 is connected to an external power supply, wherein, the communication interface 21 in the data transmission device 3 is connected to an external power supply, which may be the data transmission device 3 in the scenario shown in FIG. Power supply; the communication interface 21 in the data transmission device 3 is not connected to an external power supply, which may be that the data transmission device 3 is not connected to the electronic device 1 through the connecting line 2 in the scenario shown in FIG.

Specifically, FIG. 14 is a schematic diagram of an application scenario framework of a data transmission device provided by an embodiment of the application. The data transmission device 3 shown in FIG. 10 further includes an external power detection module on the basis of the embodiment shown in FIG. 4 . 37. The external power supply detection module 37 is respectively connected with the communication interface 31 and the controllable switch 36, and is used to detect whether the communication interface 31 has external power supply access, and when it is detected that the communication interface 31 has no external power supply access, to the available power supply. The controllable switch 36 sends a second conduction signal, and the second conduction signal is used to instruct the controllable switch 36 to close. Wherein, after the data transmission device 3 is connected to the electronic device 1 through the connection line 2, the electronic device 1 can transmit power to the communication interface 31 of the data transmission device 3 through the connection line 2. At this time, the electronic device 1 received by the data transmission device 3 Therefore, the electronic device 1 can be referred to as an external power source, and correspondingly, the power source 33 provided in the data transmission device 3 can be referred to as an internal power source.

When the microcontroller 34 detects the movement of the data transmission device 3, it will send the first conduction signal to the controllable switch 36, indicating that the controllable switch 36 is closed, and the external power detection module 37 detects that the communication interface 31 has no external power connection. At the time of entry, a second conduction signal is also sent to the controllable switch 36 to instruct the controllable switch 36 to be closed. Therefore, the controllable switch 36 in the data transmission device 3 can be provided with a related control circuit, so that the first conduction signal provided by the microcontroller 34 and the second conduction signal of the external power detection module 37 can be jointly used to control the controllable switch 36 switch 36.

Specifically, when the microcontroller 34 determines according to the detection data of the vibration sensor 35 that the data transmission device 3 is currently being moved by the user, and the user may connect an electronic device later, the microcontroller 34 provides the controllable switch 36 with a first conduction signal. However, if the communication interface 31 is already connected to the electronic device 1 through the connection line 2, it is meaningless to conduct the controllable switch 36 according to the first conduction signal. Therefore, when the external power supply detection module 37 determines that the current communication interface 31 is not connected to the external power supply, it can send the second conduction signal to the controllable switch 36, so that the controllable switch 36 receives the first conduction signal and the second conduction signal at the same time. The ON signal can only be closed. In addition, after the power supply connection is established between the internal power supply 33 and the data transmission module 32, if the external power supply detection module 37 detects that the external power supply is connected to the communication interface 31 (that is, the data transmission device 3 is connected to the electronic device 1), it is not The second conduction signal will be sent to the controllable switch (in one implementation, when the second conduction signal is high, the low level can be regarded as not sending the second conduction signal; or, when the second conduction signal is When the turn-on signal is low, the high level can be regarded as not sending the second turn-on signal, or recorded as the second turn-off signal), at this time, no matter whether the controllable switch 36 receives the signal sent by the microcontroller 34 or not. For the first turn-on signal, the controllable switch 36 will be disconnected without receiving the second turn-on signal, so that the power supply connection between the internal power supply and the data transmission module 32 is disconnected.

More specifically, in order to realize the above-mentioned control method of the data transmission device, so that the controllable switch 36 can jointly determine whether to close according to the first conduction signal and the second conduction signal, the present application also provides a method as shown in FIG. 4 . The specific structural design of the controllable switch 36 and the related control circuit in the data transmission device 3, FIG. 15 is a schematic diagram of the related circuit structure of the controllable switch and the AND gate circuit provided by some embodiments of the application, as shown in FIG. The turn-on and turn-off of the switch 36 can be realized by the turn-on and turn-off of the field effect transistor Q4 in the figure. The source S of the field effect transistor Q4 is connected to the pin VBAT of the internal power supply, and the drain D is connected to the data transmission module. 32's power supply terminal VIN_805_7911. In the example shown in FIG. 15 , the optional type of the field effect transistor Q4 is a p-channel enhancement type field effect transistor, then when the gate G is used as the control terminal of Q4, when a low level signal is received, the field effect transistor Q4 is closed, and the source S and the drain D are turned on; when receiving a high level signal, the field effect transistor Q4 is turned off, and the source S and the drain D are turned off.

In the circuit shown in FIG. 15 , a logic gate circuit is also provided before the field effect transistor Q4 for combining the first turn-on signal provided by the microcontroller 34 and the second turn-on signal provided by the external power detection module 37, The two turn-on signals together determine the high-level signal or the low-level signal sent to the field effect transistor Q4. In a specific implementation manner, the logic gate circuit is an AND gate circuit as an example.

In the first aspect, the first input terminal of the AND gate circuit D36 can be used to receive the "MCU_CL" signal, wherein the low-level signal output by the microcontroller through the STM32_1108_IO pin is denoted as the first turn-on signal, this low-level signal The signal can be used to indicate that the field effect transistor Q4 is closed, then in the circuit shown in Figure 15, the low level signal output by the STM32_1108_IO pin can make the transistor QM2 (marked as the second transistor) disconnected to obtain a high voltage The flat "MCU_CL" signal (ie, the low-level signal output by the microcontroller 34 is processed in reverse), and the high-level "MCU_CL" signal is input to the AND gate circuit D36. It can be understood that, if the high-level signal output by the microcontroller through the STM32_1108_IO pin can be recorded as the first disconnection signal, this high-level signal can be used to indicate that the field effect transistor Q4 is disconnected, as shown in Figure 15. In the circuit shown, the high-level signal output by the STM32_1108_IO pin is reversely processed by the transistor QM2 and input to the AND gate circuit D36 is the low-level "MCU_CL" signal. At this time, the low-level "MCU_CL" signal input and Gate circuit D36.

In the second aspect, the second input terminal of the AND gate circuit D36 can be used to receive the “VBS_CL” signal, wherein FIG. 16 is a schematic diagram of a partial circuit structure of an external power supply detection module provided by some embodiments of the application, wherein the external power supply detection module 37 may include a triode QM1 (denoted as the first triode), the base of the triode QM1 can be connected to the communication interface of the data transmission device 3, and is used to detect whether the communication interface is connected to the external power supply VBUS, the emitter is grounded, and the collector is grounded. The internal power supply (VBAT) is connected and can be used to output the "VBS_CL" signal. Then when the communication interface is not connected to the external power supply and VBUS is at a low level, the transistor QM1 is disconnected, and the output "VBS_CL" signal is a high-level signal (VBAT), which can be recorded as the second conduction signal. This high-level signal The user can instruct the FET Q4 to close; and when the communication interface is connected to an external power supply and VBUS is at a high level, the transistor QM1 is turned on, and the output "VBS_CL" signal is a low level signal (ground), which can be recorded as the second off On signal, this low level signal can be used to instruct the FET Q4 to be disconnected.

Finally, the AND gate circuit D36 can jointly determine the output of the AND gate circuit D36 to the field effect according to the "MCU_CL" signal sent by the microcontroller in the first aspect and the "VBS_CL" signal sent by the external power supply detection module 37 in the second aspect. The signal sent by the transistor Q4 is specifically a low-level signal or a high-level signal to control the closing and opening of the field effect transistor Q4. The logical correspondence between the "MCU_CL" signal and the "VBS_CL" signal is shown in Table 1 below.

Table 1

情况condition	VBS_CL电平VBS_CL level	MCU_CL电平MCU_CL level	与门输出电平AND gate output level		Q4状态Q4 status
11	高(无外部电源接入)High (no external power access)	低(指示断开)low (indicates disconnection)	低 Low		断开disconnect
22	高(无外部电源接入)High (no external power access)	高(指示闭合)High (indicates closed)	高 high		闭合closure
33	低(有外部电源接入)Low (with external power supply)	低(指示断开)low (indicates disconnection)	低 Low		断开disconnect
44	低(有外部电源接入)Low (with external power supply)	高(指示闭合)High (indicates closed)	低Low	断开disconnect

Specifically, in Case 1 shown in Table 1, when the data transmission device 3 is not connected to the electronic device 1 and the communication interface 21 is not connected to an external power source, the external power source detection module 37 outputs a second conduction signal to the AND gate circuit D36 , that is, in the circuit shown in FIG. 15 , the “VBS_CL” signal output by the external power detection module 37 to the second input terminal of the AND gate circuit D36 is a high-level signal. At this time, the microcontroller 34 does not detect the data transmission device. When 3 is moved, the first disconnection signal of high level is output, and the first disconnection signal of high level is processed in the reverse direction of transistor QM2 in the circuit shown in Fig. The "MCU_CL" signal output by an input terminal is a low-level signal. In Figure 15, the diode under the AND gate circuit D36 is turned on, so that the AND gate circuit D36 outputs a low-level signal, so that the transistor QM3 (denoted as the third transistor ) is disconnected, the final input signal to the gate G of the field effect transistor Q4 is a high level signal (the high level signal output by the internal power supply VBAT through the resistors RM7 and RM9), the field effect transistor Q4 is disconnected, the source S and drain When it is turned off between D, the internal power supply will not supply power to the data transmission module 32 through the field effect transistor Q4.

In case 2 shown in Table 1, there is also no external power supply, and the external power detection module 37 sends a high-level signal to the second input terminal of the AND gate circuit D36 "VBS_CL" signal. At this time, when the microcontroller 34 The vibration sensor 35 detects that the data transmission device 3 has moved, and outputs a low-level first conduction signal to the AND gate circuit D36, and the low-level first conduction signal passes through the transistor QM2 in the circuit shown in FIG. 15 . After the reverse processing, the "MCU_CL" signal finally output to the first input terminal of the AND gate circuit D36 is a high-level signal. In Figure 15, the two diodes of the AND gate circuit D36 are both turned off, and the internal power supply VBAT makes the transistor QM3 conduct. The final input signal to the gate G of the field effect transistor Q4 is a low level signal (ground), the field effect transistor Q4 is closed, the source S and the drain D are turned on, and the internal power supply transmits the data through the field effect transistor Q4 Module 32 is powered.

In case 3 and case 4 in Table 1, after the data transmission device 3 is connected to the electronic device 1, the electronic device 1 can provide power to the data transmission device 3 through the connection line 2, and the external power detection module 37 provides the AND gate circuit D36 with power. Output the second disconnection signal, that is, in the circuit shown in Figure 15, the "VBS_CL" signal output by the external power supply module 37 to the second input terminal of the AND gate circuit D36 is a low level signal, and the diode above the AND gate D36 in Figure 15 If it is turned on, then no matter whether the "MCU_CL" signal sent by the microcontroller 34 to the first input terminal of the AND gate circuit D36 is a high-level signal or a low-level signal, the AND gate D36 outputs a low-level signal to the transistor QM3 The base of the transistor QM3 is disconnected, and finally the signal input to the gate G of the field effect transistor Q4 is a high level signal (the high level signal output by the internal power supply VBAT through the resistors RM7 and RM9), the field effect transistor Q4 is disconnected, the source The connection between the pole S and the drain D is turned off, so after the data transmission device is connected to the external power supply, no matter how the microcontroller is instructed, the internal power supply will not supply power to the data transmission module through the field effect transistor Q4.

It should be noted that the capacitors, resistors and other devices provided in the circuit structures shown in FIG. 15 and FIG. 16 are for the purpose of voltage division and protection, and belong to the above-mentioned functional elements such as field effect transistors, triodes, and AND gate circuits in this application. On the basis of adaptive settings, this application does not limit whether resistors and capacitors are set at various positions in the circuit, as well as the size and specifications of the set resistors and capacitors. In practical applications, it can be based on specific circuit requirements and the work of functional components. Parameters can be set and adjusted adaptively.

In the above-mentioned embodiments of the present application, from the perspective of the microcontroller provided in the data transmission device, it is described how the microcontroller controls the power supply to quickly supply power to the data transmission module, so that the data transmission module can be powered and started as soon as possible. As for the data transmission module itself, even if the data transmission device is not connected to the electronic equipment, it can start the initialization and related communication configuration process after power on, and cooperate with the microcontroller to achieve fast startup, so that subsequent data After the transmission device is connected to the electronic device, the data transmission device can transmit the data transmitted by the electronic device to the display device, for example, project the display interface of the electronic device to the display device.

Specifically, FIG. 17 is a schematic flowchart of a control method of a data transmission device provided by an embodiment of the application. The execution body of the method shown in FIG. 17 may be a data transmission module in a data transmission device, or a data transmission module. The processor in the module, for example, a central processing unit (CPU for short), a system-on-chip (SoC for short), etc. The method shown in FIG. 17 can be shown in FIG. 8 . After S103 or S204 as shown in FIG. 9 , after the microcontroller controls the power supply to supply power to the data transmission module, the data transmission module executes it. Specifically, the method includes:

S301: After the data transmission module is powered on, the communication configuration is performed.

Specifically, taking the data transmission device 3 in the embodiment shown in FIG. 4 as an example, after the microcontroller 34 in the data transmission device 3 controls the power supply 33 to supply power to the data transmission module 32, the data transmission module 32 is powered on and performs The initialization configuration of itself, and the relevant communication configuration, wherein, the communication configuration includes: the communication configuration of the data transmission module 32 to the communication interface 31; and/or the data transmission module 32 is used for data transmission with the display device 4. Communication configuration for communication. For example, when the communication interface 31 is a USB interface, the data transmission module 32 needs to perform communication configuration on the USB interface based on the USB communication protocol; when the data transmission module 32 projects the display interface to the display device 4 through Wi-Fi, the data transmission module The group 32 needs to perform Wi-Fi protocol-based communication configuration on the data transmission module 32 .

S302: The data transmission module receives media data from the communication interface, and encodes the media data. Media data includes, but is not limited to, video stream data and audio stream data. If the communication interface is a TypeC interface, the data transmission module can receive media data in the DP protocol format.

Subsequently, after the data transmission module 32 completes the communication-related configuration, the media data corresponding to the display interface of the electronic device 1 sent by the electronic device 1 can be received from the communication interface 31, and the media data can be encoded. The function of encoding is to make the media data satisfy the communication protocol between the data transmission module 32 and the display device 4. For example, if the data transmission module 32 and the display device 4 communicate through Wi-Fi, the data transmission module 32 in S302 will The media data is encoded according to the Wi-Fi protocol, and the encoded media data can be subsequently sent to the display device 4 via Wi-Fi.

Wherein, if the user has connected the electronic device 1 and the data transmission device 3 through the connecting line 2 before the data transmission module 32 completes the communication configuration through S301, then the data transmission module completes the communication configuration through S302, The communication interface receives and encodes media data from the electronic device 1 . If the user has not connected the data transmission device 3 to the electronic device 1 after the data transmission module 32 completes the communication configuration through S301, the data transmission module 32 cannot temporarily receive media data from the communication interface 31; After the data transmission device 3 is connected through the connection line 2 , the data transmission module 32 can start to execute S302 , receive the media data from the electronic device 1 from the communication interface and encode it, and then send the encoded media data to the display device 4 .

Therefore, in this embodiment, after the data transmission module 32 in the data transmission device 3 obtains the power provided by the power supply 33, even if the current data transmission device 3 is not connected to the electronic device 1, it can first perform the configuration process of the relevant communication, After the subsequent user uses the connection line 2 to connect the data transmission device 3 to the electronic device 1, the data transmission device 3 can receive the media data corresponding to the display interface transmitted by the electronic device 1, and perform subsequent processing such as encoding, thereby improving data transmission. The response speed and transmission efficiency of the module 32. The intuitive feeling brought to the user is that after the data transmission device 3 is inserted into the electronic device 1, the data transmission device 3 can process the media data of the display interface on the electronic device 1 in a short time or even immediately and project it to the display device. 4, bring a "plug and display" user experience, and improve work efficiency.

S303: The data transmission module sends the media data encoded in S302 to a display device for display. Alternatively, after receiving the start instruction input by the user, the data transmission module sends the media data to the display device.

Subsequently, in S303, the data transmission module 32 may send the media data encoded in S302 to the display device 4 for display through the configured communication method. Alternatively, after receiving the instruction input by the user, the data transmission module 32 executes S303 to send the encoded media data to the display device 4 for display through the configured communication method. The media data may be video stream data received in real time, so that the screen of the electronic device 1 and the screen of the display device 4 are substantially synchronized.

Optionally, when the data transmission module sends the media data to the display device 4 in S303, it can also synchronously send a data transmission instruction (take the screen-sharing instruction as an example in this specification) to the display device 4, so that the display device 4 is in the display device 4. After receiving the data transmission instruction (in this specification, the screen transfer instruction is taken as an example), the received media data sent from the data transmission module is processed and displayed. The meaning of the screen transfer instruction is to instruct the display device to perform decoding and other processing and display. For example, during the data transmission process, the user inputs a stop instruction in the data transmission device 3 (for example, the user presses the stop button on the data transmission device), and the data transmission device 3 stops. Send the encoded media data to the display device 4, and send a stop transmission instruction (in this specification, the stop screen sharing instruction is taken as an example) to the display device 4, and the stop transmission instruction (in this specification, the stop screen transmission instruction is Example) is used to instruct the display device 4 not to display the received media data, then the display device 4 will stop displaying the display interface generated according to the media data transmitted by the data transmission device 3 .

Optionally, FIG. 18 is a schematic diagram of an application scenario framework of a data transmission apparatus provided by an embodiment of the application. The data transmission apparatus 3 shown in FIG. 18 further includes physical buttons 38 on the basis of the embodiment shown in FIG. 4 . , the physical button 38 can be arranged on the surface of the data transmission device 3 , and the physical button 38 is connected with the data transmission module 32 inside the data transmission device 3 . Then, the user can send a start instruction to the data transmission module 32 by pressing the physical button 38 . After receiving the start instruction, the data transmission module 32 sends the encoded media data to the display device 4 .

More specifically, FIG. 19 is a schematic state diagram of the data transmission module provided by some embodiments of the application when the data transmission device control method is executed, wherein the SoC in the data transmission module is used as the execution body, and the data transmission module is on the top. The detailed operations performed after power-on to data transmission will be explained.

As shown in FIG. 19 , taking the communication interface as the USB Type-C interface and the data communication between the data transmission module and the display device through Wi-Fi as an example, after the data transmission module 32 is powered by the power supply 33 , the SoC is initialized first. Operations, initialization operations include but are not limited to: SOC UBoot loading, SoC Linux kernel loading, and Type-C driver loading, etc. And after the initialization of the SoC itself is completed, the configuration of the communication interface (USB interface) and the configuration of the data communication (Wi-Fi) are performed. The configuration of the USB interface shown by the left arrow in FIG. - The configuration of Fi can be executed by the SoC simultaneously or sequentially, and the execution order is not limited. The Wi-Fi configuration process includes the following steps: loading the Wi-Fi driver, connecting and displaying the Wi-Fi hotspot corresponding to the device according to the preset account and password, and establishing the corresponding network port after connecting the hotspot, so that The SoC can perform data communication with the display device 4 via Wi-Fi. The configuration process of the USB interface includes the following steps: loading the image file and preparing the USB gadget storage.

Subsequently, when the SoC completes the above initialization process and the data transmission device 32 is connected to the electronic device 1, the USB device (the data transmission device 32) is recognized by the electronic device 1, and the SoC can receive the media data sent by the electronic device 1 through the USB interface. After encoding the media data according to the configured Wi-Fi protocol parameters, wait for the user to press the physical button. When the SoC receives the start command sent by the user through the physical button, it can send the encoded media data to the display device 4 by pre-establishing the network port, and also send the screen transfer instruction to the display device 4, and then the display device 4 pairs The received media data is decoded and then displayed.

In addition, optionally, after the data transmission module 32 sends the media data to the display device 4, it also includes: after receiving the stop instruction input by the user, the data transmission module 32 stops sending the screen transmission instruction to the display device 4. , and the data transmission module 32 itself also stops sending media data to the display device, wherein the user inputting the stop instruction may be pressing the physical button 38 again.

In another implementation manner, FIG. 20 is a schematic diagram of an application scenario framework of the data transmission device provided by an embodiment of the present application. With the second conduction signal, the external power detection module 37 can also be connected to the microcontroller 34 and the data transmission module 32 to detect whether the communication interface 31 has an external power supply connected, and to the controller 34 and/or the data according to the detection result. The transmission module 32 sends a corresponding indication signal (for example, a high-level signal can be used to indicate that the communication interface 31 has external power access, and a low-level signal can be used to indicate that the communication interface 31 has no external power access; or, a low-level signal It can be used to indicate that the communication interface 31 has an external power supply, and a high-level signal is used to indicate that the communication interface 31 has no external power supply, etc.). It can be understood that the external power detection module 37 can be connected to the microcontroller 34 without being connected to the data transmission module 32, and when the external power detection module 37 is connected to both the microcontroller 34 and the data transmission module 32, the data transmission module The group 32 can also detect whether an external power source is connected to the communication interface 31, so as to determine whether to send media data to the display device.

Specifically, in the actual application of the external power supply detection module 37, a scenario may be: after the data transmission module 32 sends the media data to the display device 4, the data transmission module 3 set in the data transmission device 3 can pass the data transmission module. The instruction signal sent by the external power supply detection module 37 connected to 32 detects whether the external power supply is detached from the communication interface 31. When the data transmission module 32 receives the instruction signal sent by the external power supply detection module 37 to indicate that the external power supply has been disconnected, then The data transmission module 32 stops sending the screen transfer instruction to the display device 4 , and the data transmission module 32 itself also stops sending media data to the display device 4 . In another scenario, when the microcontroller 34 receives an indication signal sent by the external power supply detection module 37 indicating that the external power supply has been disconnected, the microcontroller 34 starts a timer, and then counts a preset time (for example, 60 times) on the timer. If the instruction signal indicating that the external power source is connected to the communication interface 31 sent by the external power source detection module 37 is not received within seconds), the microcontroller 34 sends a signal indicating that the controllable switch 36 is disconnected to the controllable switch 36 (that is, the above-mentioned first disconnection signal), at this time, the external power detection module 37 also sends to the controllable switch 36 a signal indicating that the controllable switch 36 is disconnected (ie, the above-mentioned second disconnection signal), so the controllable switch 36 is controlled to be disconnected, and the micro-controller The controller 34 enters the standby state; and within the preset time (for example, 60 seconds) of the timer counts, if it receives the instruction signal sent by the external power detection module 37 indicating that the external power is connected to the communication interface 31, the microcontroller 34 sends the control switch to the controllable switch. 36 continues to send a signal indicating that the controllable switch 36 is closed (ie the above-mentioned first conduction signal), and the external power detection module 37 sends a signal indicating that the controllable switch 36 is open to the controllable switch 36 at this time (ie the above-mentioned second open signal). signal), so control the controllable switch 36 to open.

FIG. 21 is a schematic diagram of a partial circuit structure of an external power supply detection module provided by an embodiment of the application. The external power supply detection module 37 provided in FIG. 21 further includes a resistor R28 on the basis of the partial circuit shown in FIG. 16 . (denoted as the first resistance), resistor R84 (denoted as the fourth resistance), resistor R101 (denoted as the second resistance), and resistor R100 (denoted as the third resistance). It can be understood that, in the structure shown in FIG. 16 , in order to cooperate with the circuit of the controllable switch 36, the external power supply detection module 37 needs to set a triode after the connected external power supply VBUS for reverse processing, while the external power supply detection module 37 needs to set a transistor for reverse processing. When connecting the microcontroller 34 and the data transmission module 32, no triode is required.

Specifically, in the part of the circuit shown in FIG. 21 in the external power supply detection module 37, the power supply connected to the communication interface 31 is denoted as VBUS, then VBUS is grounded through resistors R28 and R84, and VBUS is also connected to data through resistors R28 and R100. The USB0_DET pin of the transmission module 32, the data transmission module can determine whether the communication interface of the data transmission device 3 is connected to the external power supply VBUS according to the level value of the USB0_DET pin; VBUS is also connected to the microcontroller through the resistor R28 and the resistor R101. the MCU_DET pin of the controller 34, the microcontroller 34 can determine whether the communication interface of the data transmission device 3 is connected to the external power supply VBUS through the level value of the MCU_DET pin.

For example, when the communication interface 31 is connected to an external power supply and VBUS is at a high level, the external power supply detection module 37 transmits the same high level to the data transmission module 32 through the USB0_DET pin. This high level signal can be It is regarded as an indication signal indicating that the communication interface 31 is connected to the external power supply, so that the data transmission module 32 can determine that the communication interface 31 is connected to the external power supply according to the high-level indication signal; when the communication interface 31 is not connected to the external power supply, VBUS At this time, the external power detection module 37 transmits the same low level to the data transmission module 32 through the USB0_DET pin. This low level signal can be regarded as an indication that the communication interface is not connected to the external power supply. signal, so that the data transmission module 32 can determine that the communication interface 31 is not connected to an external power source according to the low-level indication signal. For another example, when the communication interface is connected to an external power supply and VBUS is at a high level, at this time the external power supply detection module 37 transmits the same high level to the microcontroller 34 through the MCU_DET pin. This high level signal can be seen. As an indication signal indicating that the communication interface 31 is connected to the external power supply, the microcontroller 34 can determine that the communication interface 31 is connected to the external power supply according to the high-level indication signal; when the communication interface 31 is not connected to the external power supply, VBUS is low power At this time, the external power detection module 37 transmits the same low level to the microcontroller 34 through the MCU_DET pin. This low level signal can be regarded as an indication signal indicating that the communication interface 31 is not connected to the external power supply, so that the The microcontroller 34 may determine that the communication interface 31 is not connected to the external power source according to the external power source disconnection signal.

Optionally, the resistors R28, R84, R100 and R101 shown in Figure 21 are all from the perspective of circuit safety to ensure the reliability of the circuit. In the simplest implementation, the access shown in Figure 21 The detection circuit may also not set a resistance or set a resistance value of 0, so that the MCU_DET pin of the microcontroller 34 and the USB0_DET pin of the data transmission module 32 can be directly connected to the external power supply VBUS to achieve more direct detection.

To sum up, in the control method of the data transmission device provided in this embodiment, after the data transmission module as the execution body sends the media data to the display device for display, it can detect according to the user's stop instruction or according to the external power detection module. After the external power supply is disconnected from the communication interface, the data transmission module immediately stops sending the screen transfer command to the display device, so that the display device does not continue to display the display interface of the electronic device. In actual use, after the user connects the electronic device to the data transmission device, if it is found that the interface displayed by the current electronic device is inconvenient to display on the display device, the user can send a stop command or directly connect the data transmission device to the screen. Pull out from the electronic device, so that the display device no longer displays the media data sent by the data transmission device, thereby improving the response speed of the data transmission device to user disconnection instructions and actions, and improving the response speed and data transmission speed of the data transmission device. The transmission efficiency can also protect the user's privacy to a certain extent, so that the user can prevent the display in time when the private information is mistakenly projected to the screen, thereby improving the user experience of the data transmission device.

Further, in the data transmission device 3 provided in the embodiment of the present application, when it is detected that the data transmission device 3 is moved, the microcontroller 34 will control the power supply 33 to supply power to the data transmission module 32. However, in some application scenarios, The movement of the data transmission device 3 may not be because the user wants to use the data transmission device 3 for data transmission, but the user accidentally touches the data transmission device 3 or just wants to move the data transmission device 3, and the data transmission device 3 will not be connected to the data transmission device 3. When the electronic device 1 is connected, if the internal power supply 33 continues to supply power to the data transmission module 32, the power of the power supply 33 will be wasted. Therefore, the embodiments of the present application further propose a dual power saving protection mechanism to address this technical problem. In the embodiment of the present application, first, it is proposed to set an acceleration threshold value in the vibration sensor 35 or the microcontroller 34 (for details, please refer to the setting method of the threshold value embodiment), and through the comparison result, the microcontroller 34 determines whether to send an acceleration threshold to the controllable switch. 36 sends a conduction signal, and by setting the acceleration threshold, some tiny vibrations or invalid vibration signals can be filtered out, so as to prevent the microcontroller 34 from sending a conduction signal to the controllable switch 36, so that the power supply 33 supplies power to the data transmission module 32, Waste electric energy; however, even when the acceleration value of the data detected by some vibration sensors 35 exceeds the preset acceleration threshold value, it is not necessarily that the user wants to use the data transmission device 3. Therefore, in order to further reduce the waste of electric energy of the power supply 33, the micro-controller After the power supply connection between the internal power supply 33 and the data transmission module 32 is turned on, the controller 34 further includes the steps:

Within the first preset time (for example, 60 seconds, which is sufficient for the user to connect the data transmission device 3 to the electronic device 1) after the microcontroller 34 receives the detection data or the interruption signal from the vibration sensor 35, if the The external power detection module 37 sends an indication signal that detects that the communication interface 31 has an external power connection, and the microcontroller 34 continues to send a signal to the controllable switch 36 to indicate that the controllable switch 36 is closed (ie, the above-mentioned first conduction signal), At this time, the external power detection module 37 sends a signal indicating that the controllable switch 36 is disconnected (ie, the above-mentioned second disconnection signal) to the controllable switch 36, so the controllable switch 36 is controlled to be disconnected, and the internal power supply 33 and the data transmission module are controlled. The power supply connection between 32 is disconnected; within the first preset time after the microcontroller 34 receives the detection data or the interruption signal of the vibration sensor 35, if the detection communication interface 31 sent by the external power detection module 37 is not received There is an indication signal that the external power supply is connected, then after the first preset time, the microcontroller 34 sends a signal indicating that the controllable switch 36 is disconnected (ie, the first disconnection signal) to the controllable switch 36. At this time The external power detection module 37 sends a signal indicating that the controllable switch 36 is turned on (ie, the above-mentioned second conduction signal) to the controllable switch 36, so it controls the controllable switch 36 to turn off, and controls the connection between the internal power supply 33 and the data transmission module 32. The power supply connection between them is disconnected.

Specifically, the execution body of this step may be the microcontroller 34. After determining that the data transmission device 3 has moved, it may send the signal by setting the STM32_1108_IO pin of the microcontroller 34 to a low level signal as shown in FIG. 15 . The first conduction signal controls the conduction of the controllable switch 36, so that the internal power supply 33 supplies power to the data transmission module 32 through the controllable switch 36, and at the same time, the microcontroller 34 will start a first preset time (for example, 60 seconds) timer. After controlling the controllable switch 36 to be turned on, the microcontroller 34 will detect whether the communication interface 31 is connected to an external power supply. That is, the level of the MCU_DET pin determines whether the communication interface 31 is connected to an external power supply. If it is determined that an external power supply is connected according to the indication signal before the 60-second timer expires, the timing ends, and the microcontroller 34 keeps the STM32_1108_IO pin set to a low level signal (instructing the controllable switch 36 to be closed). If after the 60-second timer expires, it is determined according to the indication signal that no external power supply has been connected during the 60-second period, then after the 60-second timer expires, the microcontroller 34 adjusts the STM32_1108_IO pin to be set to a high-level signal. The first disconnection signal (instructing the controllable switch 36 to be disconnected) is sent in the method, and the controllable switch 36 is controlled to be disconnected, so that the power supply does not continue to supply power to the data transmission module 32 after 60 seconds, thereby ensuring that users of non-data transmission devices can The movement caused by the accidental touch of the data transmission device 3 will not cause the power supply 33 to continuously supply power to the data transmission module 32 , thereby reducing power loss and improving the integrity of the microcontroller 34 in controlling the data transmission device.

In addition, in another embodiment of the present application, after the data transmission device 3 is connected to the electronic device 1, the microcontroller 34 continues to send a signal indicating that the controllable switch 36 is closed to the controllable switch 36 (that is, the above-mentioned first conduction signal ), at this time, since the external power detection module 37 sends a signal indicating that the controllable switch 36 is disconnected (ie, the second disconnection signal) to the controllable switch 36, the controllable switch 36 is controlled to be disconnected, and the internal power supply 33 and data The power supply connection between the transmission modules 32 is disconnected. If the data transmission device 3 is pulled out by the user after that, since the microcontroller 34 does not send a signal indicating disconnection to the controllable switch 36 (that is, the above-mentioned first disconnection signal), it will start a A timer for the second preset time (for example, 60 seconds), and before the timer expires, it continues to send a signal indicating that the controllable switch 36 is closed (ie, the above-mentioned first conduction signal), and the external power detection module 37 sends a signal to the controllable switch 36 . The switch 36 sends a signal indicating that the controllable switch 36 is turned on (ie, the above-mentioned second conduction signal), so the controllable switch 36 is controlled to be turned on, and the power supply connection between the internal power supply 33 and the data transmission module 32 is controlled to be turned on again. In this way, even after the data transmission device 3 is pulled out, before the timer ends the timing of the second preset time, if the data transmission device 3 is connected to the electronic device 1, since the controllable switch 36 is turned on, the power supply 33 turns to the data transmission mode. The group 32 is powered, so that the data transmission module 32 is in a working state, and will not be powered off immediately due to the loss of external power after the data transmission device 3 is pulled out. When the next electronic device 1 is inserted, data transmission can be performed quickly, thereby improving work efficiency.

Optionally, in the above embodiment, after the microcontroller 34 controls the controllable switch 36 to be turned on, if the vibration sensor 35 does not detect the subsequent movement of the data transmission device 3, the microcontroller 24 can enter the standby mode, and then When the vibration sensor 35 detects the movement of the data transmission device, it can wake up the microcontroller 34 by sending an interrupt signal to the microcontroller 34, so that the microcontroller 34 switches back to the working state and immediately sets the STM32_1108_IO pin to a low level signal, and start a timer for a preset time and detect whether the external power supply is connected.

For example, FIG. 22 is a schematic state diagram of a microcontroller executing a data transmission device control method according to some embodiments of the present application, wherein, taking the microcontroller 34 as the MCU set in the data transmission device 3 as an example, when the MCU is powered on ( For example, after the data transmission device 3 is powered on when it leaves the factory, the initialization configuration of the MCU is performed, including the configuration of the acceleration threshold. After completing the above startup work, the MCU sets the STM32_1108_IO pin to a low level signal, and starts a timer for 60 seconds when it detects that the communication interface of the data transmission device 3 is not connected to an external power supply. While the timer is within 60 seconds, the MCU continues to detect whether there is an external power supply connected to the communication interface. If the external power supply is detected within 60 seconds, the MCU keeps the STM32_1108_IO pin set to a low level signal; if at 60 If the external power supply is not detected within seconds, the MCU will enter the standby state after setting the STM32_1108_IO pin to a high level signal. Until the next time the vibration sensor 35 detects the movement of the data transmission device (that is, the real-time acceleration value exceeds the preset acceleration threshold), after sending an interrupt signal to the MCU, the MCU ends the standby and switches to the working state, and according to the interrupt signal, the STM32_1108_IO pin is Set to a low level signal, then repeat the above process of starting the 60-second timer, and continue to cycle.

After the data transmission device 3 is connected to the electronic device 1 within the preset time, the MCU keeps the STM32_1108_IO pin as a low level signal to the controllable switch 36 to instruct the controllable switch 36 to close. The VBS_CL signal sent by the control switch 36 is a low level signal to indicate that the controllable switch 36 is disconnected, so the controllable switch 36 is controlled to be disconnected, and the power supply connection between the control internal power supply 33 and the data transmission module 32 is disconnected. The data transmission device 3 is pulled out by the user again, because the microcontroller 34 continues to hold the low level signal to the controllable switch 36 to instruct the controllable switch 36 to close, and the external power detection module 37 sends the VBS_CL signal to the controllable switch 36 It is a high level signal to indicate that the controllable switch 36 is closed, so the controllable switch 36 is controlled to be turned on, and the power supply connection between the internal power supply 33 and the data transmission module 32 is controlled to be turned on again. In this way, even after the data transmission device 3 is pulled out, the data transmission module 32 will continue to be in a working state, and will not be powered down due to the loss of the external power supply after the data transmission device 3 is pulled out. The electronic device 1 can quickly perform data transmission and improve work efficiency.

Optionally, an embodiment of the present application further provides a method for controlling a data transmission device, which is applied to the process of switching the connection relationship between the same data transmission device and different electronic devices, and the execution body may be a microcontroller. Among them, the microcontroller can also detect whether the communication interface is connected to the external power supply through the MCU_DET pin in the external power supply detection module as shown in Figure 21. When it is detected that the external power supply of the communication interface is disconnected, the internal power supply is controlled by Power is supplied to the data transmission module, so that the data transmission module maintains a wireless connection with the display device. When the subsequent user connects another electronic device to the data transmission device, the data transmission module can send the media data transmitted by the current electronic device to the display device without performing initialization and related communication configuration steps, so that the data In the process of switching from different electronic devices, the transmission device reduces the preparation time required for the switched electronic device to use the data transmission device, thereby reducing the need for users to view the data transmission device on the display device after connecting the switched electronic device to the data transmission device. The waiting time to the projected display interface improves the data transmission efficiency of the data transmission device and improves the user experience.

In one implementation, the external power detection module 37 may only be connected to one of the microcontroller 34 and the data transmission module 32, and at the same time, there is a communication connection between the microcontroller 34 and the data transmission module 32 (for example, through I2C, UART (Universal Asynchronous Receiver/Transmitter, general asynchronous transceiver) or GPIO (General-purpose input/output, general-purpose input and output) and other connection methods). For example, FIG. 23 is a schematic diagram of an application scenario framework of an embodiment of the data transmission device provided by the present application, wherein the external power detection module 37 set is connected to the communication interface 31 and the data transmission module 32, and the data transmission module 32 can pass the external The indication signal of the power detection module 37 determines whether the communication interface 31 is connected to an external power supply, for example, through the USB_DET pin shown in FIG. FIG. 24 is a schematic diagram of an application scenario framework of an embodiment of the data transmission device provided by the present application, wherein the external power detection module 37 set is connected to the communication interface 31 and the microcontroller 34 , and the microcontroller 34 can pass the external power detection module 37 The indication signal of , determines whether the communication interface 31 is connected to an external power supply, for example, through the MCU_DET pin shown in FIG.

The present application provides another embodiment. FIG. 25 is a schematic flowchart of a data transmission method provided by an embodiment of the present application. Specifically, based on the embodiments of FIGS. 4 , 7 , 15 , 16 and 21 , A data transmission method, as shown in Figure 25, includes:

Step S401, the MCU receives the information sent by the sensor;

The information sent by the sensor can be detection data or an interrupt signal. The MCU may also be referred to as a microcontroller, a microcontroller unit, or the like.

In this embodiment, the vibration sensor 35 sends detection data to the MCU as an example. The detection data carries the acceleration value of the vibration sensor 35 itself. The MCU pre-stores the acceleration threshold. The MCU compares the acceleration value in the detection data with the pre-stored acceleration threshold according to the comparison result. It is judged whether or not the data transmission device 3 has been moved.

In this embodiment, the vibration sensor 35 can be an acceleration sensor, and the acceleration sensor can detect the motion state of the movement of the data transmission device 3 in real time, and generate acceleration data in six directions (for example, the acceleration data detected in a certain embodiment are 0 mg, 200 mg, 100mg, 150mg, 0mg, 400mg). The MCU may acquire detection data detected by the vibration sensor 35 in real time through communication with the vibration sensor 35 at regular intervals; alternatively, the vibration sensor 35 may send the detection data detected by the vibration sensor 35 in real time to the MCU at regular intervals.

Optionally, the built-in power supply 33 of the data transmission device 3 provided in this embodiment may also be used to supply power to the MCU. In an embodiment, the MCU can set two power consumption working states, namely a first power consumption working state and a second power consumption working state, wherein, before the MCU receives the detection data or the interrupt signal, the MCU is in the data transmission device. 3 is in the first power consumption working state under the power supply of the built-in power supply 33; after the MCU receives the detection data (its acceleration value exceeds the preset acceleration threshold) or the interrupt signal, it is in the second power consumption working state, and the MCU can be set in the first power consumption working state. The power consumption in the power consumption working state is lower than the power consumption in the second power consumption working state. Specifically, the first power consumption working state may be a low power consumption working state, and the second power consumption working state may be a high power consumption working state. condition. The MCU can choose a device with a low-power working state. When the MCU is in a standby state, the MCU can be maintained in a low-power state, and its operating current can be limited to the uA level, so as to minimize the number of data transmission devices 3 Not connected to electronic equipment 1 When the MCU consumes the power of the power supply 33 .

In step S402, if the MCU determines that the data transmission device 3 is moved, it sends a first conduction signal for instructing the controllable switch 36 to be turned on to one of the input pins of the AND gate circuit D36.

Specifically, the MCU determines whether the acceleration value of the vibration sensor 35 itself received from the vibration sensor 35 exceeds the acceleration threshold. If so, it means that the data transmission device 3 has moved; if not, it means that the data transmission device 3 has not moved. at rest. For example, the MCU presets the acceleration threshold of 350mg, if the acceleration values obtained by the MCU in the six directions are (0mg, 200mg, 100mg, 150mg, 0mg, 400mg), it means that the data transmission device 3 has moved, and the STM32_1108_IO tube of the MCU The pin sends the first turn-on signal to one of the input pins of the AND gate circuit D36 (the cathode of the diode under the AND gate circuit D36 as shown in FIG. 15 ).

In this embodiment, the first turn-on signal is used to instruct the controllable switch 36 to turn on, and the first turn-on signal may be a low-level signal. Specifically, the first conduction signal used to instruct the controllable switch 36 to be turned on is a low-level signal output by the STM32_1108_IO pin of the MCU. It should be noted that the signal output by the MCU is a low-level signal, which is reversed by the transistor QM2. After processing, the level signal reaching one of the pins of the AND gate circuit D36 is the high level MCU_CL signal. Whether the first turn-on signal is a high-level signal or a low-level signal can be set according to the actual situation of the circuit. For example, in other embodiments, the signal output by the MCU indicating that the controllable switch 36 is turned on can directly control the AND gate circuit D36. one of the pins.

In other embodiments, the MCU determines that the data transmission device 3 is moved if it receives the interrupt signal sent by the vibration sensor 35 .

After the MCU determines that the data transmission device 3 is moved, the timer of the MCU starts to count the preset time (eg, 60 seconds).

Step S403 , when it is detected that the communication interface 31 of the data transmission device 3 is not connected to an external power supply, the external power supply detection module 37 sends a second conduction signal to another input pin of the AND gate circuit D36 .

Referring to the drawings, the second conduction signal is used to indicate that the controllable switch 36 is turned on, and the second conduction signal may be a high-level signal. Specifically, the external power detection module 37 and the AND gate circuit D36 A pin (as shown in Figure 15, the diode cathode above the AND gate circuit D36) is connected, and the external power detection module 37 is used to detect whether the communication interface 31 has external power access. The external power detection module 37 sends a high-level signal to the input pin of the AND gate circuit D36 to indicate that the controllable switch 36 is turned on. A high-level VBS_CL signal turns on the control switch 36 .

In step S404, the AND gate circuit D36 sends a control signal to the controllable switch 36 according to the first conduction signal and the second conduction signal to make the controllable switch 36 close, thereby connecting the power supply 33 of the data transmission device 3 and the data transmission module 32. The power supply connection between is turned on.

Specifically, as shown in Figure 15, the second conduction signal and the first conduction signal of the two input pins of the AND gate circuit D36 are the VBS_CL signal and the MCU_CL signal respectively, the "VBS_CL" signal is a high level signal, and the "MCU_CL" signal The signal is a high-level signal, the two diodes of the AND gate circuit D36 are both turned off, and the high-level signal of the internal power supply VBAT passes through the resistor RM8 and the resistor RM11 to make the transistor QM3 turn on, and finally input as the gate of the field effect transistor Q4 of the controllable switch 36 The signal of the pole G is a low level signal (the gate G is grounded through the resistor RM9 and the transistor QM3), the field effect transistor Q4 is turned on, the source S and the drain D are turned on, and the internal power supply (power supply 33) passes through the field effect. The transistor Q4 supplies power to the data transmission module 32 .

The built-in power supply 33 of the data transmission device 3 supplies power to the data transmission module 32, and the data transmission module 32 is activated and performs a related communication configuration, for example, a communication configuration in which the data transmission module 32 communicates with the communication interface, and/or data transmission The communication configuration for the data communication between the module 32 and the display device 4. For example, in a Wi-Fi communication environment, the data transmission module 32 can be a Wi-Fi module, and the data transmission module 32 can complete the Wi-Fi connection with the display device 4. -The establishment of the communication link of the Fi module, the Wi-Fi module of the display device 4 can also be an external device. When the display device 4 has a built-in Wi-Fi module, a communication link with the display device can be established to directly establish a communication link with the display device 4; when the display device 4 communicates through an external Wi-Fi module, it can be A communication link is established with the external Wi-Fi module, and the external Wi-Fi module establishes a communication link when the display device 4 is in a working state.

Since the data transmission module 32 has completed the establishment of the communication link with the display device 4 before the data transmission device 3 is connected to the electronic device 1, when the data transmission device 3 is connected to the electronic device 1, the data to be transmitted by the electronic device 1 directly passes through the The data transmission device 3 performs processing and sends it to the display device 4 for display, avoiding the configuration of the communication link when the data transmission device 3 is connected to the electronic device 1, reducing the waiting time of the user when using the data transmission device 3, and realizing Plug and play, thus improving the response speed and work efficiency of the data transmission device.

Based on the steps S401-S404 of the above embodiment, a possible application scenario is further provided: the user picks up or moves the data transmission device 3, and prepares to insert the communication interface 31 of the data transmission device 3 into the communication interface of the electronic device 1, such as an electronic The USB interface or the TYPE-C interface of the device 1, the embodiment of this application does not limit the communication interface of the electronic device 1. It should be noted that the USB interface or the TYPE-C interface of the electronic device 1 generally provides a power pin to provide power to the electronic device plugged into it.

In step S405, after the external power detection module 37 detects that the communication interface 31 of the data transmission device 3 is connected to the external power supply, the external power detection module 37 sends a signal to another input pin of the AND gate circuit D36 to indicate that the controllable switch 36 is turned off. open second disconnect signal.

Specifically, the second disconnection signal may be a low-level signal. With reference to the drawings, the external power detection module 37 sends a low-level VBS_CL signal to the diode cathode above the AND gate circuit D36 to indicate that the controllable switch 36 is disconnected .

Step S406, within the above preset time, after the external power detection module 37 detects that the communication interface 31 of the data transmission device 3 is connected to an external power supply, the external power detection module 37 sends a signal to the MCU for indicating that the external power supply has been connected , the MCU still keeps sending the first turn-on signal for instructing the controllable switch 36 to turn on to one of the input pins of the AND gate circuit D36. It can be understood that, at this time, the MCU still continues to send the first turn-on signal for instructing the controllable switch 36 to be turned on to one of the input pins of the AND gate circuit D36.

It should be noted that the above preset time is the preset time that the timer of the MCU starts to count after the MCU determines that the data transmission device 3 is moved. Specifically, as shown in FIG. 21 , when the communication interface 31 is connected to an external power supply and VBUS is at a high level, the external power supply detection module 37 transmits a high level to the MCU_DET pin of the MCU as well. The level signal is regarded as an indication signal indicating that the communication interface 31 is connected to an external power supply, so that the MCU can determine that the communication interface 31 is connected to an external power supply according to the high-level indication signal; when the communication interface 31 is not connected to an external power supply, VBUS is low At this time, the external power detection module 37 transmits the same low level to the MCU_DET pin of the MCU (the MCU_DET pin is grounded through the resistor R101 and the resistor R84), and this low level signal is regarded as indicating that the communication interface 31 has no The indication signal of connecting to the external power source enables the MCU to determine that the communication interface 31 is not connected to the external power source according to the low-level indication signal.

During the above preset time, the MCU determines that the communication interface 31 is connected to the external power supply according to the high-level signal sent by the external power supply detection module 37, then the MCU stops the timing of the preset time, and at the same time, the MCU still keeps the AND gate circuit. One of the input pins of D36 sends a signal for instructing the controllable switch 36 to be turned on, and the "MCU_CL" signal is still a high-level signal at this time.

In step S407, the AND gate circuit D36 sends a control signal to the controllable switch 36 according to the first turn-on signal and the second turn-off signal, so that the controllable switch 36 is turned off.

Specifically, as shown in Figure 15, the second disconnection signal and the first turn-on signal of the two input pins of the AND gate circuit D36 are the VBS_CL signal and the MCU_CL signal respectively, the "VBS_CL" signal is a low level signal, and the "MCU_CL" signal The signal is still a high-level signal, the diode above the AND gate circuit D36 is turned on and the diode below is turned off, and the AND gate circuit D36 outputs a low-level signal, the low-level signal controls the transistor QM3 to be cut off through the resistor RM11, and the internal power supply VBAT passes through. The resistors RM7 and RM9 make the signal of the gate G of the field effect transistor Q4 a high level signal, the field effect transistor Q4 is turned off, and the source S and the drain D are disconnected.

Since the field effect transistor Q4 as the controllable switch 36 is turned off, the power supply of the electronic device 1 cannot directly charge the battery 332 through the path of “communication interface 31-controllable switch 36-battery 332”, which can avoid damage to the battery 332.

Based on steps S405-S407 of the above-mentioned embodiment, a possible application scenario is further provided: within a preset time (for example, 60 seconds) after the MCU determines that the data transmission device 3 is moved, the user connects the data transmission device 3 to the electronic device 1. connect.

In step S408, the external power supply detection module 37 detects that the communication interface 31 of the data transmission device 3 is disconnected from the external power supply, and the external power supply detection module 37 sends another input pin of the AND gate circuit D36 to instruct the controllable switch 36 to be turned on. The second turn-on signal of the external power source detection module 37 sends to the MCU a signal indicating that the communication interface 31 is not connected to the external power source, and the signal may be a low-level signal.

In the above step S408, a possible application scenario is: after the user connects the data transmission device 3 with the electronic device 1, the user dials the data transmission device 3 out of the electronic device 1 again.

In step S409, after the MCU receives the signal sent by the external power detection module 37 to indicate that the communication interface 31 is not connected to the external power, the timer of the MCU starts timing according to a preset time (for example, 60 seconds).

In this embodiment, in order to meet the requirement of using the same data transmission device 3 for data transmission among users in turn, and to ensure that the next user can also realize the plug-and-play of the data transmission device 3, the MCU needs to be set accordingly. Specifically, a preset time (for example, 60 seconds) may be stored in the MCU. The preset time may be 60 seconds in this embodiment, and may be other time, such as 50 seconds, in other embodiments, and the time may be set according to a specific application scenario.

Step S410, within the preset time, the MCU still keeps sending a first turn-on signal for instructing the controllable switch 36 to turn on to one of the input pins of the AND gate circuit D36.

Specifically, as shown in Figure 15, the STM32_1108_IO pin of the MCU sends a low-level signal to one of the input pins of the AND gate circuit D36 (the diode cathode below the AND gate circuit D36), and the low-level signal makes the transistor QM2 disconnected , so as to obtain a high-level "MCU_CL" signal (the cathode of the diode under the AND gate circuit D36 is connected to the +3V3_SB high level provided by the internal power supply through the resistor RM6).

In step S411, the AND gate circuit D36 sends a control signal to the controllable switch 36 according to the first conduction signal and the second conduction signal, so that the controllable switch 36 is closed.

Specifically, after the controllable switch 36 is closed, the internal power supply of the data transmission device 3 supplies power to the data transmission module 32, so that the communication link between the data transmission module 32 and the display device 4 continues to be in a connected state, ensuring that the data transmission device 3 Even after dialing out from the electronic device 1, within the preset time, after the user dials out the data transmission device 3 from the electronic device 1, and inserts the next electronic device within the preset time, the The data of the electronic equipment is rapidly transmitted, so as to realize the plug-and-play of the data transmission device 3 in the alternate switching data transmission process of multiple electronic equipments.

For the above steps S410-S411, a possible application scenario is: after the user dials out the data transmission device 3 from the electronic device 1, the next electronic device 1 (possibly pulled out) is inserted again within the preset time. The electronic device 1 may also be another electronic device), during this switching time period, the communication link between the data transmission module 32 and the display device 4 continues to maintain a connected state.

Further, in some embodiments, after this step S411, the loop after step S404 may be returned to detect whether an external power source is connected within a preset time.

Specifically, when the external power detection module 37 detects that the communication interface 31 of the data transmission device 3 is connected to the external power supply within the preset time range of the timer, the external power detection module 37 sends a low-level signal to the AND gate circuit D36 The AND gate circuit D36 sends a signal to the controllable switch 36 to disconnect the controllable switch 36 according to the low-level signal and the high-level signal sent by the MCU.

In step S412, after the user dials the data transmission device 3 out of the electronic device 1, the timing of the preset time is started, and within the preset time, if the external power detection module 37 does not detect the communication interface 31 and If the external power supply is connected, after the timer of the MCU finishes timing according to the preset time, the MCU sends a first disconnection signal to one of the input pins of the AND gate circuit D36 for instructing the controllable switch 36 to be disconnected.

In this embodiment, the first disconnection signal received by the AND gate circuit D36 may be a low-level signal. Specifically, as shown in FIG. 15 , the STM32_1108_IO pin of the MCU is connected to one of the input pins of the AND gate circuit D36 ( The diode cathode under the AND gate circuit D36) sends a high-level signal, which makes the transistor QM2 conduct, thereby obtaining a low-level "MCU_CL" signal (the diode cathode under the AND gate circuit D36 is grounded through the transistor QM2) .

Step S413, the AND gate circuit D36 sends a control signal to the controllable switch 36 according to the second turn-on signal and the first turn-off signal, so that the controllable switch 36 is turned off.

Specifically, as shown in Figure 15, the second on-signal and the first off-signal of the two input pins of the AND gate circuit D36 are the VBS_CL signal and the MCU_CL signal, respectively, the "VBS_CL" signal is a high-level signal, and the "MCU_CL" signal The signal is a low level signal, the diode below the AND gate circuit D36 is turned on and the diode above it is turned off, the AND gate circuit D36 outputs a low level signal, the low level signal controls the transistor QM3 to be cut off through the resistor RM11, and the internal power supply VBAT passes through the resistor. RM7 and RM9 make the signal of the gate G of the field effect transistor Q4 a high level signal, the field effect transistor Q4 is disconnected, the source S and the drain D are disconnected, the internal power supply of the data transmission device 3 and the data transmission module 32 The power supply connection between is disconnected.

For the above steps S412-S413, a possible application scenario is: after the user dials out the data transmission device 3 from the electronic device 1, the next electronic device 1 is not inserted within the preset time (maybe the user has completed the Data transmission does not need to use the data transmission device 3). In this scenario, it can be considered that within the preset time, if the data transmission device 3 is not connected to an external power supply, it is considered that the user has completed this data transmission requirement, Then, the internal power supply is disconnected to save the power of the internal power supply of the data transmission device 3 .

Optionally, in the process of the above steps S401 - S413 , the MCU may be in the second power consumption working state under the power supply of the power supply of the data transmission device 3 . Therefore, it can be understood that before S401, if the MCU does not receive the detection data or the interrupt signal, it will keep the first power consumption working state, and after receiving the detection data or the interrupt signal in S401, it will switch to the second function. Consumption work status. Further, the first power consumption working state may be a low power consumption working state, and the second power consumption working state may be a high power consumption working state.

In addition, in the embodiments shown in FIG. 4 to FIG. 25 of the present application, the power supply 33 provided by the data transmission device 3 is set inside the data transmission device 3 as an example. In other possible implementations, each implementation of the present application The data transmission device 3 described in the example can also be powered by an external power supply when the electronic device 1 is not connected.

For example, FIG. 26 is a schematic diagram of an application scenario framework of a data transmission device provided by an embodiment of the present application, wherein the data transmission device 3 is provided with a power interface 39 . After the external power supply 5 is connected, the data transmission device 3 can be powered by the external power supply 5. At this time, the power supply function realized by the power supply 5 through the power supply interface 39 is different from the embodiments shown in FIGS. 4 to 25 of the present application. The power supply function implemented by the middle power supply 33 is the same, and will not be repeated here.

The data transmission methods of the above-mentioned embodiments can be executed by an integrated circuit such as an MCU or an SoC, and the integrated circuit such as the MCU or the SoC includes one or more processors, a memory, and a program, wherein the program is stored in the memory and stored in the memory. Configured to be executed by the one or more processors, the program is configured to execute the data transmission methods of the above-described embodiments.

For example, FIG. 27 is a schematic flowchart of an embodiment of a data transmission method provided by the present application. In the embodiment shown in FIG. 27 , a schematic diagram of a data transmission apparatus implementing the data transmission method provided by the present application through software is shown. , which can be applied to the scenario shown in FIG. 1 , the execution subject may be a data transmission device, or more specifically a processor in the data transmission device, such as CPU, GPU, SoC or MCU in the data transmission device. In the following, the execution subject is a data transmission device as an exemplary description. Specifically, the data transmission method shown in FIG. 27 includes:

S501: Receive detection data or an interruption signal of the vibration sensor.

S502: When it is determined that the acceleration value of the vibration sensor itself exceeds the acceleration threshold, or when an interruption signal is received, control the power supply of the data transmission device to supply power to the data transmission module.

Specifically, the method provided in this embodiment can be applied to a data transmission device, where a vibration sensor, a power supply, and a data transmission module are provided; the power supply can be used to supply power to the data transmission module, and the data transmission module can be used for Data communication with the display device.

In a specific implementation, the vibration sensor set in the data transmission device is used to generate detection data according to the movement of the data transmission device, and the detection data includes the acceleration value of the vibration sensor itself, then when the data transmission device receives the vibration sensor in S501 After the detection data is obtained, it can be determined in S502 that when the acceleration value of the vibration sensor in the detection data exceeds the preset acceleration threshold, the power supply of the data transmission device is controlled to supply power to the data transmission module.

In another specific implementation manner, when the acceleration value of the vibration sensor exceeds a preset acceleration threshold according to the generated detection data, the vibration sensor sends an interruption signal, then when the data transmission device receives the interruption sent by the vibration sensor at S501 After the signal is received, in S502, the power supply of the data transmission device can be controlled to supply power to the data transmission module according to the interruption signal.

Therefore, the data transmission method provided in this embodiment enables the data transmission device to control the power supply of the data transmission device to supply power to the data transmission module after the movement of the data transmission device is detected according to the vibration sensor, so that the data transmission device is not in use. When the power supply is used, the power supply may not supply power to the data transmission module, and when the user moves the data transmission device, the power supply can be controlled to supply power to the data transmission module. The data transmission device implementing the method of this embodiment can take into account both space and efficiency, and can also improve the response speed and work efficiency of the data transmission device during data transmission when the power supply in the data transmission device does not require excessive capacity and volume.

Optionally, after S502, S503 is further included: after determining that the electronic device is connected to the communication interface of the data transmission apparatus, receive media data from the communication interface, encode the media data, and send the encoded media data to the display device.

Wherein, after the data transmission module receives the power supply from the power supply and completes the relevant configuration of startup, it can start to receive the media data corresponding to the display interface of the electronic device sent by the electronic device from the communication interface, and encode the media data, sent to the display device. Thereby, the response speed of the data transmission device to the media data sent by the electronic device connected by the user through the communication interface is improved, and a "plug and display" user experience is brought to improve the working efficiency of the data transmission module.

More specifically, in S502, the data transmission device also needs to determine that when the acceleration value of the vibration sensor itself exceeds the preset acceleration threshold or receives the interrupt signal, it also needs to determine that the communication interface has no external power supply. , in order to be able to control the power supply of the data transmission device to supply power to the data transmission module. After S502, when the data transmission device determines that the communication interface has access to an external power supply, it can control the power supply to stop supplying power to the data transmission module. That is to say, the data transmission device can control the power supply to supply power to the data transmission module only when the external power supply is not connected, and when the communication interface is connected to the external power supply of other electronic devices, the power supply can not continue to supply the data transmission module power supply, thereby reducing power loss.

Optionally, in the first preset time after the data transmission device executes S502, if there is no external power supply connected to the communication interface, the data transmission device can control the power supply to stop supplying the data transmission module after the first preset time. powered by. Specifically, the purpose of the data transmission device setting the first preset time is to ensure that the movement caused by the user of the non-data transmission device accidentally touching the data transmission device will not cause the power supply to continuously supply power to the data transmission module, reducing the loss of the power supply.

Optionally, after the data transmission apparatus executes S502, when the data transmission apparatus determines that the external power supply is connected to the communication interface and is disconnected from the communication interface, within the second preset time after the disconnection, if there is no external power supply When the communication interface is connected, the data transmission device keeps the control power supply to supply power to the data transmission module within the second preset time. Correspondingly, if no external power supply is connected to the communication interface within the second preset time, the data transmission device controls the power supply to stop supplying power to the data transmission module after the second preset time. If no external power supply is connected to the communication interface, the data transmission device keeps controlling the power supply to supply power to the data transmission module during the second preset time, so that when the user switches the data transmission device from one electronic device to another electronic device, The data transmission module can maintain the working state during the switching process, and will not be powered off immediately due to the loss of external power after the data transmission device is pulled out. The device can quickly transfer data and improve work efficiency.

Optionally, in the above embodiment, the data transmission apparatus also sends a data transmission instruction to the display device while sending the encoded media data to the display device. The data transmission instruction can be used to instruct the display device to process and display the received encoded media data. Correspondingly, the data transmission apparatus may also send a stop transmission instruction to the display device, which is used to instruct the display device not to continue to display the received encoded media data.

In one scenario, the data transmission apparatus may send the encoded media data and the data transmission instruction to the display device after receiving the start instruction input by the user; or, after receiving the stop instruction input by the user, stop encoding The latter media data is sent to the display device, and a stop transmission instruction is sent to the display device. In another scenario, when the data transmission apparatus detects that the external power supply is disconnected from the communication interface, it stops sending the encoded media data to the display device, and sends a stop transmission instruction to the display device.

Specifically, through the data transmission method in this embodiment, the data transmission module can stop sending the screen sharing command immediately after the data transmission device detects that the external power supply is disconnected from the communication interface according to the user's stop instruction or according to the external power supply detection module. For the display device, the display device will not continue to display the display interface of the electronic device, thereby improving the response speed of the data transmission device to the user's disconnection instructions and actions, and improving the response speed and screen projection efficiency of the data transmission device. The privacy of the user is protected to a certain extent, so that the user can prevent the display of private information in time when the user mistakenly projects the private information to the screen, thereby improving the user experience of the data transmission device.

For another example, FIG. 28 is a schematic flowchart of an embodiment of the data transmission method provided by the present application. In the embodiment shown in FIG. 28 , another data transmission device is shown to implement the data transmission method provided by the present application through software. The schematic diagram can be applied to the scenario shown in FIG. 1 , and the execution subject may be a data transmission device, or a processor in the data transmission device, or the like. Specifically, the data transmission method shown in Figure 28 includes:

S601: According to the information sent by the sensor, start the built-in power supply of the data transmission device to supply power to the data transmission module.

Specifically, the method provided in this embodiment can be applied to a data transmission device, and a sensor is provided in the data transmission device, and the sensor is used to detect whether the data transmission device is moved. The sensor may be a vibration detector. When the sensor detects that the data transmission device is moved (for example, the vibration detector detects that the acceleration of the data transmission device exceeds a preset acceleration threshold), the user may want to use the data transmission device for data transmission, and the sensor can send a message that the data transmission device is receiving After receiving the information sent by the sensor, the built-in power supply set inside the data transmission device is activated to supply power to the data transmission module.

S602: Establish a communication link with the display device.

Specifically, in S601, after the built-in power supply supplies power to the data transmission module, the data transmission module can perform a related configuration for startup, and the related configuration at least includes a communication configuration for communication between the data transmission module and the display device, and establishes a data transmission module. The communication link between the transmission module and the display device. Further, when the data transmission device is connected to the electronic device and the communication link is established, the data transmission device receives the data from the electronic device, encodes the data, and sends the encoded data through the established communication link. to the display device. Optionally, the data transmission module may be a Wi-Fi module, and the communication link may be a Wi-Fi communication link.

S603: It is detected that the connection with the electronic device is detected, and the built-in power supply of the data transmission device is stopped to supply power to the data transmission module.

Specifically, when the data transmission device detects that the data transmission device is connected to the electronic device, the power supply of the electronic device can provide power to the data transmission device, and can control the power supply inside the data transmission device to stop supplying power to the data transmission module, so as to prevent the electronic device from being damaged. The power supply directly charges the power supply inside the data transmission device.

S604: Receive data from the electronic device, and send the data to the display device through the established communication link.

In some embodiments, after detecting the connection with the electronic device, the data transmission apparatus may receive data corresponding to the display interface of the electronic device from the electronic device, encode the data, and pass the encoded data through the established The communication link is sent to the display device. Optionally, after detecting the connection with the electronic device, the data transmission apparatus may execute S603 and S604 at the same time, or the sequence of the steps is not limited.

Further, in some embodiments, after S604 as shown in FIG. 28 , when the data transmission device detects that it is disconnected from the connected electronic device, the data transmission device starts the built-in power supply to supply power to the data transmission module, and at the same time, also The established communication link between the data transmission device and the display device is maintained. And within the preset time, if it is not detected that the data transmission device is connected to any electronic equipment, after the preset time, the built-in power supply of the data transmission device will be stopped to continue supplying power to the data transmission module. The communication link established between the data transmission device and the display device will also be disconnected. Therefore, in this embodiment, when the user switches the data transmission device from one electronic device to another electronic device, the data transmission device can be switched to the built-in power supply in time during the switching process, so that the data transmission device can be powered from the external power supply to the built-in power supply. The seamless switching enables the data transmission device to maintain the working state and maintain the established communication link. When the user pulls out one electronic device and inserts the next electronic device, data transmission can be performed quickly, realizing the plug-and-play of the data transmission device in the alternate switching data transmission process of multiple electronic devices, and improving work efficiency.

In other embodiments, after S604 as shown in FIG. 28 , when the data transmission device detects that it is disconnected from the connected electronic device, because the data transmission device loses the power supply of the electronic device, the data transmission device is powered down, The communication link between the data transmission device and the display device is disconnected, and then the data transmission device starts the built-in power supply of the data transmission device to supply power to the data transmission module. After the data transmission module receives the power supply from the built-in power supply of the data transmission device , reconfigure the communication between the data transmission device and the display device, and re-establish the communication link between the data transmission device and the display device. Since the data transmission device starts to configure the communication with the display device before inserting the next electronic device, the data transmission device can quickly perform data transmission when the next electronic device is inserted, reducing or even eliminating the user's waiting time and realizing data transmission. The plug-and-play of the transmission device during the data transmission process of alternate switching of multiple electronic devices improves the response speed and work efficiency of the data transmission device during data transmission.

On the basis of the above embodiment, the embodiment of the present invention further provides an improved way to further improve the data reception, processing speed and efficiency of the data transmission device 3 . Specifically, when the connection line between the electronic device 1 and the data transmission device 3 is a TypeC connection line, the data transmission device 3 needs to use a TypeC interface, and the TypeC interface can directly obtain the media data in the DP protocol format output by the external computer. In the working mode of (DisplayPort), the external computer can send the media data in its cache to the data transmission device without installing a specific driver, and the media data includes the media data of video data or audio data. The data transmission device automatically obtains the media data displayed on the screen of the external computer through the TypeC interface and sends it to the display device, so that the external computer can send the media data displayed on the screen of the external computer to the display device through the data transmission device without installing a driver. It is shown that the time for installing the driver program is reduced, and the data receiving and processing speed and efficiency of the data transmission device 3 are further improved.

FIG. 29 is a schematic structural diagram of another implementation manner of the data transmission device 3 provided by the embodiment of the present invention. The data transmission device is designed to include the TypeC interface 21 shown in FIG. 29 , and the differential signal transmission pins in the TypeC interface 21 are The media data receiving port is used to receive the media data transmitted from the external computer, and the media data can be the audio and video data displayed or played by the external computer on the screen. The uncompressed first audio and video data output by the video signal interface of the external computer is DP audio and video data, and the video signal interface may be a TypeC interface. The data transmission device includes the above-mentioned TypeC interface 21, namely USB-Type-C, hereinafter referred to as the TypeC interface 21, USB-Type-C is a hardware interface specification of a universal serial bus (USB), which has more Fast transmission speed (up to 10Gbps) and more powerful power transmission (up to 100W), and compatible with USB2.0, USB3.0 and DP (DisplayPort). Type C interface 21 has a total of 24 pins, including two rows of pins with the same function. See Figure 30. Pins A1 to A12 in Figure 30 are one row, and pins B1 to B12 are the other row, supporting positive or negative insertion. . The Type C interface 21 includes two pairs of power pins, four pairs of differential pins, and CC pins used for pairing communication when inserted and paired. The two pairs of power pins refer to A9, B4, B9, and A4 in Figure 3. The four pairs The differential pins are detailed in A11, B2, A10, B3, A4, B10, A2, and B11 in Figure 3, and the CC pins are detailed in A5 in Figure 3. Among them, TX+, TX-, RX+ and RX- in each group of pins are differential signal transmission pins, and each group of differential signal transmission pins supports working in USB mode or DP (DisplayPort) mode. When the differential signal transmission pin pair works in USB mode, the signal transmission pin pair transmits USB3.0 signals; when the differential signal transmission pin pair works in DP mode, the signal transmission pin pair is used as DP (DisplayPort ) interface is used.

The scheme of the embodiment of the present invention can be realized by the following methods:

After the data transmission device is powered on, the external computer will send an inquiry data packet to the data transmission device through the CC pin of the USB-Type-C interface. The inquiry data packet can be a VDM (Vendor Defined Message) signal. After the VDM signal, the response information is sent to the external computer through the CC pin in the TypeC interface 21. The response information includes the current working mode of the data transmission device or the supported working mode is DP (DisplayPort) mode. The response information also Information such as the specific power supply range of the data transmission device may be included. After the external computer receives the response information sent by the data transmission device, it adjusts the power supply voltage to the data transmission device according to the power supply range information; at the same time, the external computer recognizes that the current working mode of the data transmission device or the supported working mode is DP (DisplayPort ) mode, set the USB-Type-C interface of the external computer to work in DP (DisplayPort) mode, and call the operating system of the external computer to pre-install the DP (DisplayPort) driver, through the differential pins in the USB-Type-C interface of the external computer To transmit media content including audio and video to the data transmission device, the content may be media data in DP protocol format.

3) receive the media data of the DP protocol format by the differential signal transmission pin, wherein the media data comprises at least one from the video data or the audio data on the processing device;

Specifically, in the embodiment of the present invention, the differential signal transmission pins are used to transmit differential signals. Optionally, in the embodiment of the present invention, referring to FIG. 3 , the differential signal transmission pins may be four pairs of differential pins. See A11, B2, A10, B3, A4, B10, A2, B11 in Figure 3.

4) converting media data into first format data;

Specifically, this step is an optional step. If the microprocessor of the data transmission device cannot directly support converting the media data in the DP protocol format into the data in the H.264/H.265 format and/or the data in the AAC format, the data transmission device needs to convert the media data in the DP protocol format first. The data is converted into a data format that the microprocessor can process. Specifically, a data conversion chip may be added to the data transmission device to convert media data in DP protocol format into video data in MIPI format and/or audio data in I2S format. MIPI (Mobile Industry Processor Interface, Mobile Industry Processor Interface), MIPI is an open standard and a specification for mobile application processors initiated by the MIPI Alliance. Standardized integration; I2S (Inter-IC Sound, integrated circuit built-in audio) bus, which is specially used for data transmission between audio devices.

5) According to the coding scheme, the first format data is compressed and encoded into the second format data, wherein the second format data is compressed media data;

Specifically, if step 4) is a mandatory step, the MIPI format video data and/or the I2S format audio data are then compressed into H.264/H.265 format data and/or AAC format by the microprocessor If step 4) is an optional step, the media data in DP protocol format can be directly compressed into data in H.264/H.265 format and/or data in AAC format. The compressed data can occupy less bandwidth, and more data can be transmitted under the same transmission requirements.

6) sending the compressed media data through a communication network;

Specifically, the compressed data can be sent to the display device through a wireless network. Optionally, the wireless network may be a Wi-Fi network, a 3G/4G/5G communication network, or other networks with a data transmission function. Optionally, before compressing video data in MIPI format and/or audio data in I2S format, or before compressing media data in DP protocol format, a user's screen-sharing startup instruction is also received, and the screen-sharing startup instruction inputted by the user is started. The instruction compresses the above data, and after the compression is sent to a large-screen display device for display through a wireless network.

Optionally, before receiving the user's screen sharing start instruction, discard the received video data in MIPI format and/or audio data in I2S format or media data in DP protocol format, without performing compression or transmission processing, saving The resources of the microprocessor of the data transmission device.

7) Receive the touch signal from the display device and transmit the touch signal to the external computer.

Specifically, in a conference scenario, the display device has a touch function, and can receive the user's touch operation or touch behavior in real time, the display device converts the touch operation or touch behavior into a touch signal, and converts the touch signal to the touch signal. The touch signal is transmitted to the data transmission device through the wireless network, and the microprocessor of the data transmission device receives the touch signal. Since the DP pin of the TypeC interface only supports receiving media data from an external computer, there is also a connection between the microprocessor and the TypeC interface. To set up another USB transmission channel, the details are shown in the USB transmission channel in Figure 29 and Figure 31. The microcontroller sends the touch signal to the external computer through the USB transmission channel between the microcontroller and the TypeC interface. The external computer responds to the touch signal or starts a corresponding application program according to the touch signal, so as to realize the touch return function and increase the experience of human-computer interaction.

In the embodiment of the present invention, since the operating system of the external computer itself supports audio and video data transmission through the DP (DisplayPort) interface, the redesign of the data transmission device enables the data transmission device to directly use its own TypeC interface to communicate with the external computer. The TypeC interface of the computer is connected, and the external computer directly sends the media data in the DP protocol format to the data transmission device through the TypeC interface. In the DP (DisplayPort) working mode, the external computer can send the media content including audio and video data to the data transmission device without driver installation without the need to install a specific driver, which saves the time for the external computer to install the driver.

Optionally, when the media data in the DP protocol format needs to be converted into the video data in the MIPI format and/or the audio data in the I2S format, and then compress the video data in the MIPI format and/or the audio data in the I2S format, The solution of this embodiment can be implemented by arranging a data conversion chip in the data processing device, and the chip can run the DP protocol. In the embodiment of the present invention, the data processing device is a wireless screen sharing device as an example for description. The wireless screen transmitter includes a TypeC interface, a wireless module, a data conversion chip and a microprocessor; the TypeC interface is connected with the data conversion chip, the wireless module can be a Wi-Fi module, and the data conversion chip is connected to the TypeC The interface and the microprocessor are respectively connected, and the microprocessor is connected with the wireless module. The specific implementation is as follows:

1) The data conversion chip of the wireless screen feeder sends a request signal to the external computer through the paired communication pin of the TypeC interface, and the request signal is used to request the external computer to send the DP protocol format to the at least one pair of differential signal transmission pins. media data;

3) The data conversion chip of the wireless screen transmission device receives the media data of the DP protocol format through the differential signal transmission pin, wherein the media data includes at least one of the video data or the audio data from the external computer;

4) According to the preset coding scheme, the data conversion chip of the wireless screen transmission device converts the media data into the first format data;

Specifically, the data conversion chip of the wireless screencaster converts the media data in the DP protocol format into video data in the MIPI format and/or audio data in the I2S format.

5) The data conversion chip of the wireless screen sharing device sends the video data of MIPI format and/or the audio data of I2S format to the microprocessor of the wireless screen sharing device;

6) When the microprocessor of the wireless screen transfer device receives the screen transfer instruction output by the user, it starts to compress the video data in MIPI format and/or the audio data in I2S format into data in H.264/H.265 format and/or Data in AAC format; otherwise, discard the video data in MIPI format and/or the audio data in I2S format;

Specifically, the microprocessor of the wireless screen sharing device can receive the screen sharing instruction through the screen sharing button of the wireless screen sharing device; wherein, the screen sharing button of the wireless screen sharing device is a hardware button, which is arranged on the upper surface of the wireless screen sharing device. or side; the screen transfer button of the wireless screen transmitter can also be a soft button. The soft button is realized by a program and is set on the interface of the display screen of the wireless screen transmitter, or on the display interface of an external computer. Users can click This soft key starts the compression and encoding of video data in MIPI format and/or audio data in I2S format.

sending the compressed media data through a communication network;

Specifically, the compressed data in H.264/H.265 format and/or data in AAC format is sent to a large-screen display device for display through a wireless network. Optionally, the wireless network may be a Wi-Fi network, a 3G/4G/5G communication network, or other networks with a data transmission function.

In the embodiment of the present invention, since the operating system of the external computer itself supports audio and video data transmission through the DP (DisplayPort) interface, therefore, through the redesign of the wireless screen transmitter, the wireless screen transmitter can directly use its own TypeC interface. It is connected with the TypeC interface of the processing device, and the processing device directly sends the media data in the DP protocol format to the wireless screen sharing device through the TypeC interface. In this DP (DisplayPort) working mode, the external computer can send media content including audio and video data to the wireless screen sharing device without the need to install a specific driver, saving the time for the external computer to install the driver. , to improve the efficiency of the meeting.

Since the TypeC interface 21 also has the power signal transmission pins VBUS (A9, B4, B9, A4) shown in Figure 30, there is no need to add an additional interface to connect the power supply, and the power supply signal of the external computer can be obtained, which is the microcomputer in the data processing device. The processor 24 and other components that need power supply are powered. In addition, the TypeC interface 21 also has the USB2.0 data transmission pins D+ and D- shown in FIG. 30, which can be used to transmit other data. Therefore, this embodiment The data processing device includes a TypeC interface 21, and the differential signal transmission pins in the TypeC interface 21 are used as screen data receiving ports, which has the advantage of diversifying the functions of the data processing device. The data transmission device also includes a first conversion IC23, that is, a first data conversion chip, which is used to convert the media content in the data packet corresponding to the DP (Displayport) protocol received from the user's external computer to suitable for the microprocessor 24. It can be converted into a data format. Specifically, the first data conversion chip can convert the video part of the media content into data in MIPI format, and convert the audio part of the media content into data in I2S format, both of which are also called first format data. . MIPI video data may contain a sequence of image frames including pixels represented in YUV format; I2S audio signals may be presented in Pulse Code Modulation (PCM) format. After format conversion by the first data conversion chip, the media data in the two formats can be provided to the microprocessor 24. In a specific embodiment, the microprocessor 24 is a hardware processor (such as an ARM processor), Microprocessor 24 may be programmed to support video/audio encoders to compress video data and audio data. The microprocessor 24 can encode MIPI video data according to video compression standards (such as H.264, H.265, etc.), and encode I2S audio data according to audio compression standards (such as OPUS audio codec standard or MP3 standard or AAC) Encoding, both are also called second format data.

The microprocessor 24 sends the encoded video data and audio data to the wireless module 12. The wireless module 12 is specifically the first wireless transmitter/receiver. The wireless module 12 can transmit the encoded and compressed video data through the wireless network. and audio data are transmitted to the second wireless transmitter/receiver of the large-size display screen or the large-size touch display screen paired with the data transmission device. The wireless module 12 may include a wireless network card paired with a wireless network for communicating with a second wireless transmitter/receiver connected to the display device. Therefore, the user does not need to perform any network configuration on the external computer, and the user only needs to insert the data transmission device into the USB-Type-C port of the external computer to complete the sharing process.

Specifically, the present embodiment also includes a trigger device that is connected to and paired with the microprocessor 24. The user can control the trigger device to control the working state of the microprocessor 24 and the wireless module 12, and freely participate in sharing or exit the sharing. . For example, when the user generates the first user operation for instructing the start of screen sharing through the triggering device, the microprocessor 24 responds to the triggering of the triggering device, thereby starting to compress and encode the video data and audio data, so as to transmit through the wireless module 12 to a large-size display screen or a large-size touch display screen; or, when the user generates a second user operation for instructing to stop the screen transmission through the trigger device, the microprocessor 24 responds to another trigger from the trigger device, thereby stopping the video Data and audio data are compressed, encoded, and sent to a large-size display screen or a large-size touch display screen through the wireless module 12, and the video data and audio data received from the first data conversion chip are discarded. Specifically, the triggering device can be physical hardware or virtual keys, and can be set integrally with the data transmission device or separately from the data transmission device. For example, the triggering device can be an infrared remote control that is paired with the data transmission device. .

On the basis of the above solution, this embodiment also provides an optional further improvement solution: the data transmission device further includes a first conversion IC23 for converting the input DP video data into MIPI video data for output, and the first conversion IC23 is connected to Between the differential signal transmission pin and the first data input port of the microprocessor 24, the input end of the first conversion IC23 is connected to the differential signal transmission pin, and the output end of the first conversion IC23 is connected to the first data input port of the microprocessor 24. a data input port. Since there are few types of microprocessors that can be used to transmit video data on the market at present, there are also fewer types of ports that can be supported. MIPI port is one of the most widely used microprocessor ports, and converts DP video data into MIPI video. The data conversion IC is also relatively widely used, so the first data input port is the MIPI port, and the first conversion IC 23 converts the DP video data into MIPI video data and outputs it to the microprocessor 24, which is more convenient for those skilled in the art to implement the present invention. technical solutions to improve practicability.

Generally, the first conversion IC 23 also needs power supply. In order to save energy, the data transmission device further includes a power supply module 26, which may include a DC-DC (direct current to direct current) circuit and/or an LDO (low dropout regulator, low dropout linear voltage regulator). device) circuit. The input end of the power supply module 26 is connected to the power signal transmission pin of the TypeC interface 21 , and the output end is connected to the power supply port of the first conversion IC 23 .

Preferably, the first audio and video data compressed and encoded by the microprocessor 24 is H264 audio and video data, H265 audio and video data or MPEG audio and video data.

As mentioned above, currently there are few types of microprocessors that can be used for transmitting video data on the market. In this embodiment, an IP Camera (IP Camera) processor is preferably used as the microprocessor 24 . The IP camera processor is a relatively mature microprocessor used to transmit video data in the communication network. It can realize the function of compression and coding, and has a built-in Web-based operating system, so that the video data can be sent to the end user through the network.

Further, the microprocessor 24 is further configured to provide a second operating system to implement pairing management of the WiFi module.

FIG. 31 is a schematic structural diagram of another implementation manner of a data transmission apparatus provided by an embodiment of the present invention.

This embodiment replaces the first conversion IC in the above technical solution with the second conversion IC 28 and the third conversion IC 29 . The second conversion IC28 is used to convert the input DP video data into HDMI video data for output, and the third conversion IC29 is used to convert the input HDMI video data into BT1120 data or BT656 data for output. The second conversion IC 28 and the third conversion IC 29 are connected between the differential signal transmission pin and the first data input port of the microprocessor 24, wherein the input end of the second conversion IC 28 is connected to the differential signal transmission pin , the output end of the second conversion IC 28 is connected to the input end of the third conversion IC 29, and the output end of the third conversion IC 29 is connected to the first data input port of the microprocessor 24. The BT1120 or BT656 port is also a common port of the microprocessor 24, and the second conversion IC28 and the third conversion IC29 are also relatively widely used. Therefore, the embodiment of FIG. 31 provides another method to improve the usability of peripheral devices. plan.

Optionally, the schematic structural diagram of the data transmission device shown in FIG. 31 further includes a power supply module 26 , a power management module 27 or a flash memory 25 , and the corresponding connection structure and function can be set with reference to the technical solution corresponding to FIG. 29 .

To sum up, in the technical solutions of the embodiments of the present invention, the data transmission device includes a screen data receiving port that can directly acquire screen data of the processing device, and also includes a wireless module that can transmit the screen data to the wireless communication network. When the data transmission device is inserted into the external computer, the data transmission device automatically obtains the screen data output by the external computer to the monitor and sends it to the communication network, so that the screen can be transmitted to other network nodes in the communication network for display without installing the driver. In the prior art, the USB interface is used to transmit the compressed and encoded data to the wireless module, and the technical solution of this embodiment has the effects of driving-free screen transfer, reducing the preparation time before screen transfer, and not occupying the resources of the processing device.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. Scope.

Claims

A data transmission device, characterized in that the data transmission device comprises a power supply, a microcontroller, a communication interface, a vibration sensor, a controllable switch and a data transmission module, the communication interface is a TypeC interface, and the data transmission module The group includes a Wi-Fi module and a microprocessor, and the microprocessor is connected to the TypeC interface;

the controllable switch is connected between the power supply and the data transmission module;

The TypeC interface is used to receive media data in the DP protocol format sent by an external computer;

The vibration sensor is configured to generate detection data according to the movement of the data transmission device, and the detection data carries the acceleration value of the vibration sensor itself;

The data transmission module is used to receive the media data transmitted from the TypeC interface, process the media data, and send it to the display device; the media data is the media data in the DP protocol format or the The video data in MIPI format and/or the audio data in I2S format generated after the media data in the DP protocol format is processed;

The microcontroller is configured to control the on-off of the controllable switch according to the detection data of the vibration sensor and a preset acceleration threshold.
The data transmission device according to claim 1, wherein:

When the controllable switch is closed, the power supply connection between the power supply and the data transmission module is turned on, and the data transmission module is also used for communication configuration;

The communication configuration includes: a communication configuration of the communication interface; and/or a communication configuration of the data transmission module for data communication with the display device.
The data transmission device according to claim 1, further comprising:

an external power detection module, the external power detection module is connected to the communication interface and the controllable switch;

The external power supply detection module is used to detect whether the communication interface has an external power supply connected.
A data transmission method, applied to a data transmission device, the data transmission device comprising a data transmission module, the data transmission module comprising a Wi-Fi module and a microprocessor, characterized in that it comprises:

Microcontroller receives detection data or interrupt signal;

The external power detection module sends a second conduction signal to the AND gate circuit for instructing the conduction of the controllable switch;

The microcontroller sends a first turn-on signal to the AND gate circuit for instructing the turn-on of the controllable switch;

The AND gate circuit sends a control signal to the controllable switch according to the input first conduction signal and the second conduction signal, so that the controllable switch is closed, so as to connect the power supply of the data transmission device to the controllable switch. The power supply connection between the data transmission modules is turned on;

The microprocessor receives the media data in the DP protocol format transmitted from the external computer through the TypeC interface, and sends the media data to the display device through the Wi-Fi module after processing the media data.
The data transmission method according to claim 4, further comprising:

When the external power supply detection module detects that the external power supply is connected, it sends a second disconnection signal to the AND gate circuit for instructing the controllable switch to be disconnected;

The external power supply detection module sends a signal to the microcontroller for indicating that the external power supply has been connected;

The microcontroller sends a first turn-on signal to the AND gate circuit for instructing the turn-on of the controllable switch;

The AND gate circuit sends a control signal to the controllable switch to turn off the controllable switch according to the inputted first turn-on signal and the second turn-off signal.
The data transmission method according to claim 5, further comprising:

When the external power supply detection module detects that the external power supply is disconnected, it sends a second conduction signal for instructing the controllable switch to be turned on to the AND gate circuit;

The external power supply detection module sends a signal to the microcontroller indicating that the external power supply is not connected;

The timer of the microcontroller starts timing according to the preset time;

The AND gate circuit sends a control signal to the controllable switch according to the second turn-on signal sent by the external power supply detection module and the first turn-on signal sent by the microcontroller to make the controllable switch. The control switch is closed.
The data transmission method according to claim 6, characterized in that, comprising:

Within the preset time, when the external power detection module detects that the external power is connected, the external power detection module sends a second disconnection signal to the AND gate circuit for indicating that the controllable switch is disconnected; The AND gate circuit sends a control signal to the controllable switch to turn off the controllable switch according to the second disconnection signal and the first turn-on signal sent by the microcontroller.
The data transmission method according to claim 7, characterized in that, comprising:

Within the preset time, if the external power detection module does not detect that the external power is connected, after the timer of the microcontroller finishes counting according to the preset time, the microcontroller sends the The gate circuit sends a first disconnection signal for instructing the controllable switch to be disconnected;

The AND gate circuit is based on the first disconnection signal sent by the microcontroller for instructing the controllable switch to be turned off and the second conduction signal sent by the external power detection module for instructing the controllable switch to be turned on. An on signal is sent, and a control signal is sent to the controllable switch so that the controllable switch is turned off.
The data transmission method according to claim 6, wherein before the microcontroller receives the detection data or the interrupt signal, the method further comprises:

The microcontroller is in a first power consumption working state when powered by the power supply of the data transmission device.
The data transmission method according to claim 4, wherein the method further comprises:

The microcontroller receives a touch signal sent by the display device, where the touch signal is generated by a user's touch behavior on the display device;

The microcontroller sends the touch signal to the external computer through the USB transmission channel between the microcontroller and the TypeC interface.