Type-C interface standby control device and display terminal

Abstract

The utility model discloses a Type-C interface standby control device and a display terminal, relates to the technical field of power supply control, and is used for realizing dormancy control on the premise of meeting the power-on display startup sign of a large-screen display terminal. Aiming at the problem that the existing Type-C interface cannot provide sleep mode switching control for high-voltage demand equipment, the utility model provides the Type-C interface standby control device, corresponding control signals are output to a PD control chip through a controller so as to realize control of different voltage outputs of the Type-C interface, and the Type-C interface standby control method is simple and convenient to operate. Therefore, the low-voltage output different from the normal working mode is provided for the high-voltage demand equipment. Moreover, through the arrangement of a first switch module, a first pull-up circuit and a first pull-down circuit, the PD control chip can request the Type-C interface to output 20V voltage at the beginning of power-on, namely, by default, so as to meet the requirement that the high-voltage demand display terminal is powered on to display a startup sign.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply control, in particular to a Type-C interface standby control device and a display terminal. Background Art

[0002] USB Type-C is a Universal Serial Bus (USB) interface appearance standard that has both power transmission and data transmission functions and is widely used in mobile phones, mobile screens, live broadcasters, monitors and other devices. Most devices that use the Type-C interface, such as mobile phones, require a low voltage from the Type-C interface, usually only 5V voltage output is required to meet normal working needs. Therefore, the most common output voltage level of the Type-C interface is 5V.

[0003] However, Type-C interfaces are now gradually being applied to devices with large screens or amplifiers, such as live broadcast machines and mobile screens. At this time, a higher voltage level power output is required, such as 20V. However, a high voltage level power output is bound to bring higher power consumption, especially when the connected device enters standby mode (such as the large screen is turned off, but there are still processes in the background of the device). Excessive power consumption cannot meet the requirements of standby power consumption in actual applications.

[0004] Therefore, technicians in this field are in urgent need of a Type-C interface standby control device for realizing the control of the power consumption of the Type-C interface, so that it can meet the working needs of devices with high voltage requirements such as large screens while also meeting the low power consumption requirements in standby mode. Utility Model Content

[0005] The purpose of the utility model is to provide a Type-C interface standby control device and a display terminal.

[0006] In order to solve the above technical problems, the utility model provides a Type-C interface standby control device, including: a controller, a first switch module, a first pull-up circuit and a first pull-down circuit;

[0007] Wherein, the first end of the first switch module is connected to the output voltage control end of the PD control chip, and the output voltage control end of the PD control chip is also connected to the first pull-up circuit;

[0008] The second end of the first switch module is grounded;

[0009] The control end of the first switch module is connected to the sleep control end of the controller through a first pull-down circuit.

[0010] In one aspect, the first pull-up circuit includes: a pull-up resistor and a first power supply;

[0011] Wherein, the first power supply is a power supply for supplying power to the PD control chip;

[0012] The output voltage control terminal of the PD control chip is connected to the positive electrode of the first power supply through the first pull-up circuit.

[0013] On the other hand, it also includes: an enabling circuit;

[0014] The enabling circuit is arranged between the first pull-up circuit and the output voltage control terminal of the PD control chip, and the control terminal of the enabling circuit is connected to the enabling control terminal of the controller.

[0015] On the other hand, the enabling circuit includes: a second switch module;

[0016] A first end of the second switch module is connected to the first pull-up circuit, a second end of the second switch module is grounded, and a control end of the second switch module is connected to an enable control end of the controller.

[0017] On the other hand, the enabling circuit further includes: a third switch module and a second pull-up circuit;

[0018] The third switch module is arranged between the control terminal of the second switch module and the output voltage control terminal of the PD control chip;

[0019] The first end of the third switch module is connected to the control end of the second switch module and the second pull-up circuit, the second end of the third switch module is grounded, and the control end of the third switch module is connected to the output voltage control end of the PD control chip.

[0020] On the other hand, the enabling circuit further includes: a second pull-down circuit;

[0021] The second pull-down circuit is connected to the control end of the third switch module.

[0022] On the other hand, the first switch module, the second switch module and the third switch module are switch tubes.

[0023] On the other hand, the first switch module is a triode;

[0024] The second switch module is an NMOS tube;

[0025] The third switch module is a triode.

[0026] In order to solve the above technical problems, the utility model also provides a display terminal, including the Type-C interface standby control device as described above.

[0027] On the other hand, the display terminal is any one of a mobile screen, a live broadcast machine or a display.

[0028] The utility model provides a Type-C interface standby control device, which is connected to the Type-C interface and controls the voltage output of the Type-C interface through a controller. The power delivery (PD) control chip is connected; further, the controller can input corresponding high and low level signals to the output voltage control terminal of the PD control chip according to the working needs and whether to enter the sleep mode, so as to realize the free control of the output voltage level of the Type-C interface. Among them, the PD control chip generally controls the Type-C interface to output a 20V voltage when a high level is received, and controls the Type-C interface to output a 5V voltage when a low level is received. Therefore, when the Type-C interface normally supplies power to a large screen or other devices with high voltage power supply requirements, the controller can output a high level control signal to the PD control chip so that the Type-C interface outputs a 20V voltage; when the Type-C interface supplies power to a device with low voltage requirements or the device enters the sleep mode, the controller can output a low level control signal to the PD control chip so that the Type-C interface outputs a 5V voltage; thereby realizing the voltage output and sleep control of the Type-C interface.

[0029] In addition, especially for the power-on scenarios of display terminals such as mobile screens, live broadcast machines, and monitors, in this scenario, the display terminal is required to light up and display the power-on logo as soon as it is powered on. However, at this time, the controller and other chips are also in the state of just being powered on, and they may not be able to output a high level normally to make the Type-C interface output 20V voltage. At this time, the operating voltage of the open collector (OC) circuit is generally 12V, and the screen cannot display the power-on logo normally.

[0030] Therefore, the device sets the first pull-up circuit so that the output voltage control end of the PD control chip inputs a high level by default, that is, the Type-C interface outputs a 20V voltage by default when it is turned on, thereby meeting the need for the device to display a power-on logo on the power-on screen; and the first switch module is used to control the high and low levels of the input at the output voltage control end of the PD control chip; when the first switch module is turned on, the level at the output voltage control end is pulled down to ensure normal sleep control; further, the first pull-down circuit is set at the sleep control end of the controller to ensure that the sleep control end outputs a low level by default to avoid the first switch tube from being turned on, that is, to further ensure that the Type-C outputs a 20V voltage at the beginning of power-on to meet the need for the display terminal to display a power-on logo on the power-on screen.

[0031] The display terminal provided by the utility model corresponds to the above-mentioned Type-C interface standby control device, and has the same effect as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A circuit diagram of a Type-C interface standby control device provided by the utility model. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0035] The core of the utility model is to provide a Type-C interface standby control device and a display terminal.

[0036] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] For Type-C interface, most countries and regions currently require standby power consumption to be less than 0.5W; if the output voltage of Type-C interface is 20V, this standby power consumption condition cannot be met; and if the output voltage of Type-C interface is 5V, since the voltage difference of all aspects of 5V power supply system is lower, this low power consumption requirement can be met. Therefore, seeking a solution to achieve Type-C interface output voltage control has become a major problem to be solved by technicians in this field.

[0038] In the power supply control of the Type-C interface, there is a power delivery (PD) control chip connected to the CC pins (CC1 and CC2, which are mainly used to determine the working status of the Type-C interface and control the charging method of the device) of the Type-C interface. Therefore, the PD control chip has the function of controlling the voltage output of the Type-C interface, so the above-mentioned sleep control needs can be met by additionally using other hardware devices or software methods to enable the PD control chip to know the required working status of the device.

[0039] However, especially for display terminals with large screens, in current practical applications, whenever the display terminal is powered on, it is usually necessary to light up the screen and display the power-on logo. At this time, the Type-C interface is required to output 20V voltage by default at the beginning of power-on, otherwise the normal display of the power-on logo cannot be guaranteed. However, general controllers or control chips cannot normally implement the control function at the beginning of power-on, which results in a simple control scheme that cannot simultaneously meet the two conditions of displaying the power-on logo and controlling the sleep state of the large-screen display terminal.

[0040] Based on the above problems, this embodiment provides a Type-C interface standby control device, such as Figure 1 As shown, it includes: a controller, a first switch module (Q1), a first pull-up circuit (resistor R1) and a first pull-down circuit (resistor R2);

[0041] Wherein, the first end of the first switch module is connected to the output voltage control end (Voltage_ask) of the PD control chip, and the output voltage control end of the PD control chip is also connected to the first pull-up circuit;

[0042] The second end of the first switch module is grounded;

[0043] The control end of the first switch module is connected to the sleep control end (PMIC_SLEEP_H) of the controller through a first pull-down circuit.

[0044] First, according to the above description, the PD control chip has the function of controlling the output voltage level of the Type-C interface. In the standby control device provided by the present utility model, the output voltage level of the Type-C interface is controlled by outputting a high level or a low level to the output voltage control terminal of the PD control chip. In general, the PD control chip can be set to output a 20V voltage at the Type-C interface when the output voltage control terminal receives a high level, and to output a 5V voltage at the Type-C interface when the output voltage control terminal receives a low level.

[0045] Furthermore, according to the above circuit structure, when the first switch module is not turned on, the level at the output voltage control terminal of the PD control chip is pulled up to a high level by the first pull-up circuit, and the corresponding Type-C interface outputs a 20V voltage. When the first switch module is turned on, the first end and the second end of the first switch module are equivalent to being connected, and the output voltage control terminal of the PD control chip is equivalent to being directly grounded. At this time, the level at the output voltage control terminal of the PD control chip is pulled down, and the corresponding Type-C interface outputs a 5V voltage.

[0046] Therefore, the controller can control the output voltage of the Type-C interface by controlling the on and off of the first switch module, that is, it can control whether the device enters the sleep state. Moreover, based on the above circuit structure setting, even if the controller cannot normally perform the sleep control function at the beginning of power-on, the first switch module is turned off by default, and the first pull-up circuit can pull up the level at the output voltage control end of the PD control chip to achieve the purpose of outputting 20V voltage at the beginning of power-on, so as to meet the requirement of the large-screen display terminal to light up the screen and display the power-on logo when it is powered on.

[0047] Furthermore, the sleep control device is also provided with a first pull-down circuit, which is arranged at the sleep control end of the controller controlling the output voltage of the Type-C interface. The sleep control end is made to output a low level by default, preventing the first switch module from being turned on, and further ensuring that the large-screen display terminal can smoothly display the power-on logo at the beginning of power-on.

[0048] It can be seen that the Type-C interface standby control device provided by the utility model realizes the control of the output voltage of the Type-C interface through the controller connected to the PD control chip, that is, the sleep control under the premise of meeting the low power consumption requirement of the Type-C interface sleep. In addition, through the setting of the first pull-up circuit, the first switch module and the first pull-down circuit, it is adapted to the need of the Type-C interface to access the large-screen display terminal to display the power-on logo. Specifically, the first pull-up circuit enables the PD control chip to receive a high level by default at the beginning of power-on, and the Type-C interface outputs a 20V voltage to adapt to the power supply requirement of the large-screen display terminal to display the power-on logo; the first switch module is used to pull down the level at the output voltage control end of the PD control chip during the conduction time to realize the sleep control; the first pull-down circuit is used to make the sleep control end of the controller output a low level by default, avoiding the first switch module being turned on at the beginning of power-on to pull down the level at the output voltage control end of the PD control chip, so as to ensure that the large-screen display terminal can display the power-on logo normally.

[0049] On the other hand, this embodiment does not impose strict restrictions on the specific implementation and material selection of the above-mentioned devices. The controller can select any device with simple level output and control functions, such as a microcontroller unit (MCU). Furthermore, the controller can also reuse the control module or control chip in the Type-C interface or display terminal, for example, reuse the system-on-chip (SOC) as the main control chip in the Type-C interface as the above-mentioned controller.

[0050] For the first switch module, in order to meet the control needs of the controller, an electronic switch can be selected, such as a switch tube and other switch devices can be implemented, this embodiment does not impose strict restrictions on this, it can be a triode or a field effect tube (MOSFET, referred to as MOS tube). Figure 1 In the circuit shown in , the first switch module is specifically the transistor Q1.

[0051] As for the first pull-up circuit, this embodiment provides a preferred implementation scheme, such as Figure 1 As shown, the first pull-up circuit comprises: a pull-up resistor R1 and a first power supply PD_POWER;

[0052] Wherein, the first power supply PD_POWER is a power supply for supplying power to the PD control chip;

[0053] The output voltage control terminal of the PD control chip is connected to the positive electrode of the first power supply through the first pull-up circuit.

[0054] In the present embodiment, the first pull-up circuit has a simple structure and can be implemented by a pull-up resistor R1. In particular, in the present embodiment, the first power supply selected as the pull-up power supply is specifically the power supply of the PD control chip (i.e., PD_POWER), that is, whether the pull-up power supply is powered or not is consistent with the PD control chip. In this way, on the one hand, it is ensured that the first power supply also works when the PD control chip is powered on (i.e., when the Type-C interface is powered on), and that the level at the output voltage control end of the PD control chip is pulled up to a high level. On the other hand, it also makes it possible that when the PD control chip is not powered on (i.e., when the Type-C interface is not powered on), the level at the output voltage control end of the PD control chip does not need to be pulled up, and the first power supply can not work to further reduce power consumption, and better adapt to the low power consumption requirements of the Type-C interface in practical applications.

[0055] The first pull-down circuit can be realized by a simple pull-down resistor R2, similar to the first pull-up circuit. Figure 1 As shown, the sleep control terminal of the controller is grounded by a pull-down resistor, so that the level at the port is pulled down to a low level by default.

[0056] On the other hand, this embodiment also provides a possible implementation scheme, wherein the above-mentioned Type-C interface standby control device further includes: an enabling circuit;

[0057] The enabling circuit is arranged between the first pull-up circuit and the output voltage control terminal of the PD control chip, and the control terminal of the enabling circuit is connected to the enabling control terminal (EXT_EN) of the controller.

[0058] That is, in this embodiment, the controller can realize the enable control of the Type-C interface standby control device based on the enable circuit. The enable circuit is arranged between the first pull-up circuit and the output voltage control terminal of the PD control chip. If the enable circuit is not turned on, the output voltage control terminal of the PD control chip cannot obtain a high level through the first pull-up circuit, that is, the Type-C interface cannot output a 20V voltage. This is the enable control based on the highest priority of ensuring the low power consumption requirement of the Type-C interface standby.

[0059] Furthermore, for the specific implementation of the enabling circuit, this embodiment also provides a possible implementation scheme, such as Figure 1 As shown, the enabling circuit includes: a second switch module (Q2);

[0060] A first end of the second switch module is connected to the first pull-up circuit, a second end of the second switch module is grounded, and a control end of the second switch module is connected to an enable control end of the controller.

[0061] Based on the enabling circuit structure provided in this embodiment, it can be seen that when the Type-C interface needs to output 20V voltage at the beginning of power-on, the first pull-up circuit is required to smoothly pull up the level at the output voltage control terminal of the PD control chip. At this time, the controller cannot guarantee the normal control function, so the second switch module needs to be turned off by default to ensure that the level at the output voltage control terminal of the PD control chip is not pulled down.

[0062] Similarly, the second switch module can also be implemented by an electronic switch such as a switch tube, which can be a triode or a MOS tube, for example. Figure 1 In the circuit shown, the second switch module is specifically an NMOS tube Q2.

[0063] At this time, when the second switch module is turned off, the controller can control the on and off of the first switch module through the sleep control terminal, thereby realizing the sleep control of the Type-C interface. When the second switch module is turned on, the level at the output voltage control terminal of the PD control chip is pulled down, and the Type-C interface can only output 5V voltage and is in sleep mode.

[0064] Based on the conduction logic of the second switch tube, it can be known that when the second switch tube is an NMOS tube, its gate is connected to a low level to turn off, that is, it corresponds to the sleep control enable, which is contrary to the general high-level enable operation habit. Therefore, based on the enabling circuit provided in the above embodiment, this embodiment also provides a preferred implementation scheme, wherein the enabling circuit further includes: a third switch module (Q3) and a second pull-up circuit (R3);

[0065] The third switch module is arranged between the control terminal of the second switch module and the output voltage control terminal of the PD control chip;

[0066] The first end of the third switch module is connected to the control end of the second switch module and the second pull-up circuit, the second end of the third switch module is grounded, and the control end of the third switch module is connected to the output voltage control end of the PD control chip.

[0067] The second pull-up circuit can also be implemented by the pull-up resistor R3, and the first power supply PD_POWER can also be selected as the connected pull-up power supply.

[0068] Similarly, the third switch module can also be implemented by a switch tube module. A possible implementation scheme is as follows: Figure 1 As shown, the third switch tube module is a transistor Q3.

[0069] Under the premise of the enabling circuit structure provided in this embodiment, the enabling logic of the Type-C interface standby control device is as follows:

[0070] When it is necessary to enable the sleep control of the Type-C interface, the EXT_EN terminal of the controller outputs a high level, and the transistor Q3 is turned on. At this time, the level at the collector of the transistor Q3 is pulled down to a low level; and the gate of the NMOS tube Q2 is turned off after receiving the low level, and the level at the Voltage_ask terminal of the PD control chip can be pulled up by the pull-up circuit; that is, at this time, the level at the Voltage_ask terminal is only affected by the conduction and shutdown of the transistor Q1, and the controller can realize the enable control of the Type-C interface by controlling the switching state of the transistor Q1, that is, the sleep control is enabled.

[0071] Similarly, when the enable control of the Type-C interface does not need to be enabled, only the EXT_EN terminal needs to output a low level.

[0072] Furthermore, when the EXT_EN terminal outputs a high level, the sleep control logic is:

[0073] When the PMIC_SLEEP_H terminal of the controller outputs a low level, transistor Q1 is turned off, and the voltage level at the Voltage_ask terminal is not pulled down by transistor Q1, so it remains pulled up by the first pull-up circuit. At this time, the Type-C interface outputs a 20V voltage, corresponding to the non-sleep state.

[0074] When the controller's PMIC_SLEEP_H terminal outputs a high level, transistor Q1 is turned on, and the voltage level at the Voltage_ask terminal is pulled low by transistor Q1. At this time, the Type-C interface outputs a 5V voltage, corresponding to the sleep state.

[0075] In summary, the control logic of the machine status connected to the Type-C interface and the level at the controller EXT_EN and PMIC_SLEEP_H terminals is:

[0076] Only when the EXT_EN terminal outputs a high level and the PMIC_SLEEP_H terminal outputs a low level, the Type-C interface outputs a 20V voltage and the large-screen display terminal is in normal working condition.

[0077] In addition, if the EXT_EN terminal outputs a low level or the PMIC_SLEEP_H terminal outputs a high level, the Type-C interface outputs a 5V voltage and the large-screen display terminal is in sleep or standby state.

[0078] The truth table of the above control logic is shown in Table 1 below:

[0079] Table 1 Type-C interface control logic truth table

[0080] EXT_EN PMIC_SLEEP_H Voltage_ask Machine Status H L H Power on H / L H L Sleep / Standby L H / L L Sleep / Standby

[0081] It can be seen from the above control logic truth table that based on the setting of the third switch module in this embodiment, the logic of enable and sleep control conforms to the actual level control logic behavior habits, that is, the output high level corresponds to enable and enter sleep, and the low level corresponds to terminate enable and exit sleep, which is convenient for user control.

[0082] Further, based on the enabling circuit structure provided in the above embodiment, this embodiment also provides a preferred implementation scheme, such as Figure 1 As shown, the enabling circuit further includes: a second pull-down circuit (R4);

[0083] The second pull-down circuit is connected to the control end of the third switch module.

[0084] The second pull-down circuit can be simply implemented by a pull-down resistor R4, or other implementations can be selected according to other needs, which is not limited in this embodiment.

[0085] In this embodiment, by setting the second pull-down circuit, the level at the controller EXT_EN terminal is set to a low level by default, which is similar to the purpose of setting the first pull-down circuit and is beneficial to improving the stability of the control logic of the Type-C interface standby control device.

[0086] In the above embodiments, a Type-C interface standby control device is described in detail, and the present application also provides an embodiment corresponding to a display terminal. This embodiment provides a display terminal, including the Type-C interface standby control device described in any of the above embodiments.

[0087] Furthermore, the display terminal provided by the present invention can be any one of a mobile screen, a live broadcast machine or a display.

[0088] Since the embodiments of the display terminal part correspond to the embodiments of the Type-C interface standby control device part, please refer to the description of the embodiments of the Type-C interface standby control device part for the embodiments of the display terminal part, which will not be repeated here.

[0089] The above is a detailed introduction to a Type-C interface standby control device and a display terminal provided by the utility model. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can refer to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the utility model.

[0090] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A Type-C interface standby control device, characterized in that: include: A controller, a first switch module, a first pull-up circuit and a first pull-down circuit; Wherein, the first end of the first switch module is connected to the output voltage control end of the PD control chip, and the output voltage control end of the PD control chip is also connected to the first pull-up circuit; The second end of the first switch module is grounded; The control end of the first switch module is connected to the sleep control end of the controller through the first pull-down circuit.

2. The Type-C interface standby control device according to claim 1, characterized in that: The first pull-up circuit comprises: a pull-up resistor and a first power supply; Wherein, the first power supply is a power supply for supplying power to the PD control chip; The output voltage control terminal of the PD control chip is connected to the positive electrode of the first power supply through the first pull-up circuit.

3. The Type-C interface standby control device according to claim 1 or 2, characterized in that: Also includes: enabling circuit; The enabling circuit is arranged between the first pull-up circuit and the output voltage control terminal of the PD control chip, and the control terminal of the enabling circuit is connected to the enabling control terminal of the controller.

4. The Type-C interface standby control device according to claim 3, characterized in that: The enabling circuit comprises: a second switch module; A first end of the second switch module is connected to the first pull-up circuit, a second end of the second switch module is grounded, and a control end of the second switch module is connected to an enable control end of the controller.

5. The Type-C interface standby control device according to claim 4, characterized in that: The enabling circuit further includes: a third switch module and a second pull-up circuit; The third switch module is arranged between the control terminal of the second switch module and the output voltage control terminal of the PD control chip; Among them, the first end of the third switch module is connected to the control end of the second switch module and the second pull-up circuit, the second end of the third switch module is grounded, and the control end of the third switch module is connected to the output voltage control end of the PD control chip.

6. The Type-C interface standby control device according to claim 5, characterized in that: The enabling circuit further includes: a second pull-down circuit; The second pull-down circuit is connected to the control end of the third switch module.

7. The Type-C interface standby control device according to claim 5, characterized in that: The first switch module, the second switch module and the third switch module are switch tubes.

8. The Type-C interface standby control device according to claim 7, characterized in that: The first switch module is a triode; The second switch module is an NMOS tube; The third switch module is a triode.

9. A display terminal, characterized in that: The invention comprises the Type-C interface standby control device as described in any one of claims 1 to 8.

10. The display terminal according to claim 9, characterized in that: The display terminal is any one of a mobile screen, a live broadcast machine or a display.

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