External terminal-connectable lectern and its control method

Abstract

This invention provides a lectern with external terminal connectivity and its control method. The lectern body is equipped with a touch screen and an interface unit. The lectern's interior includes a main control board, a switcher, a power module, and a projection screen interface. The main control board is connected to the touch screen, the switcher, and the power module. The switcher is connected to the interface unit, the projection screen interface, and the touch screen. When the main control board detects an external terminal connection at the interface unit, it controls the switcher to switch the local host projection input to the external terminal projection input. Simultaneously, it controls the power module to cut off power to the touch screen. In addition to integrating touch, projection, and external terminal access functions, it can automatically switch the local host projection input to the external terminal projection input upon detecting an external terminal connection, and automatically switch back to local host projection after the external terminal is unplugged, making it more intelligent. The switching process also turns off the control screen to prevent screen light from affecting the use of the external terminal, optimizing the user experience.

Description

Technical Field

[0001] This invention relates to the field of lectern technology, and in particular to a lectern that can be connected to an external terminal and its control method. Background Technology

[0002] Most lecterns on the market are made of wood and do not include any electronic devices. On the one hand, these lecterns don't even have cable management ports, and speakers often need to bring their own laptops or tablets to the stage to use them, whether for personal viewing or to present information such as meeting topics or posters to the audience via PowerPoint. On the other hand, these lecterns also cannot directly connect to external mobile devices for screen projection.

[0003] Therefore, this single-function lectern can no longer meet the needs of today's high-tech society, and it also lowers the level of speeches, conferences and exhibitions, reduces the efficiency of speakers' presentations, and fails to meet the information presentation needs of organizers and participants. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the aforementioned technologies. Therefore, one objective of the present invention is to provide a lectern that can be connected to an external terminal, integrating multiple functions, saving energy, and greatly optimizing the user experience.

[0005] The second objective of this invention is to propose a control method for a lectern that can be connected to an external terminal, supporting multiple functions, saving energy, and greatly optimizing the user experience.

[0006] To achieve the above objectives, a first aspect of the present invention provides a lectern that can be connected to an external terminal, comprising a lectern body; the lectern body is equipped with a touch screen and an interface unit; the lectern body is internally equipped with a main control board, a switch, a power module and a projection screen interface;

[0007] The main control board is connected to the touch screen, the switcher, and the power module respectively; the switcher is connected to the interface unit, the projection screen interface, and the touch screen respectively.

[0008] The main control board is configured to, when detecting an external terminal connection to the interface unit, control the switcher to switch the local host projection input to the external terminal projection input; simultaneously, control the power module to cut off the power supply to the touch screen; and, when detecting no external terminal connection to the interface unit, control the switcher to switch the external terminal projection input to the local host projection input; simultaneously, control the power module to restore the power supply to the touch screen.

[0009] According to an embodiment of the present invention, a lectern that can connect to an external terminal integrates touch control, projection, and external terminal access functions. It can also automatically switch the local host projection input to the external terminal projection input upon detecting an external terminal connection, and switch back to the local host projection input when no external terminal is connected, making projection more intelligent. Furthermore, it automatically turns off the control screen when switching to external terminal projection input to avoid screen brightness affecting the placement and use of the external terminal, and automatically restores the control screen brightness after switching back to local host projection input, greatly optimizing the user experience.

[0010] In addition, the lectern that can be connected to an external terminal according to the above embodiments of the present invention may also have the following additional technical features:

[0011] Optionally, the interface unit includes an HDMI interface;

[0012] Specifically, the main control board is used to determine the voltage of the HDMI interface in the interface unit is higher than a threshold when it detects that the voltage is higher than a threshold.

[0013] The interface unit has an external terminal connected; when the voltage of the HDMI interface in the interface unit is detected to be lower than the threshold, it is determined that no external terminal is connected to the interface unit.

[0014] Optionally, the main body of the lectern is also equipped with a display screen; the main body of the lectern is also equipped with an industrial control board and a graphics card;

[0015] The switcher is connected to the industrial control board via the graphics card;

[0016] The industrial control board is connected to the touch screen, the display screen, the graphics card, the main control board, the interface unit, and the power module, respectively.

[0017] Optionally, the interface unit further includes a USB interface; the USB interface is connected to the industrial control board.

[0018] Optionally, the main body of the lectern is also equipped with a switch; the main body of the lectern is also equipped with a network interface.

[0019] The network interface is connected to the switch; the switch is connected to the interface unit, the industrial control board and the power module respectively.

[0020] Optionally, both the touchscreen and the display screen are located on the surface of the main body of the lectern; the display screen is located on the...

[0021] Above the touchscreen.

[0022] Optionally, the side of the lectern facing the audience is equipped with a front screen; the front screen is connected to the industrial control board and the graphics card respectively.

[0023] Optionally, the main body of the lectern is equipped with a lifting module to enable the main body of the lectern to have a lifting function.

[0024] To achieve the above objectives, a second aspect of the present invention provides a control method for a lectern based on the aforementioned externally connectable terminal, the control method comprising:

[0025] When an external terminal is detected connected to the interface unit, the local host projection input is switched to the external terminal projection input; simultaneously, the power supply to the touch screen is cut off; and when no external terminal is detected connected to the interface unit,

[0026] Then, the external terminal projection input is switched to the local host projection input; simultaneously, power supply to the touchscreen is restored. The control method for an externally connected lectern provided by the above embodiments of the present invention, in addition to integrating touch functionality...

[0027] In addition to projection and external terminal access functions, it can automatically switch the local host projection input to the external terminal projection input when an external terminal is detected, and switch back to the local host projection input when no external terminal is connected, making projection more intelligent; and it automatically turns off the control screen when switching to external terminal projection input to avoid screen light affecting the external terminal.

[0028] The placement and use of the terminal are optimized, and the control screen automatically recovers its brightness after switching to local host projection input, greatly improving the user experience.

[0029] In addition, the control method for the lectern with an external terminal proposed in the above embodiments of the present invention may also have the following additional technical features:

[0030] If the voltage of the HDMI interface of the interface unit is detected to be higher than the threshold, it is determined that an external terminal is connected to the interface unit; if the voltage of the HDMI interface of the interface unit is detected to be lower than the threshold, it is determined that no external terminal is connected to the interface unit. Attached Figure Description

[0031] Figure 1 A schematic diagram of the internal structure of a lectern with an external terminal according to an embodiment of the present invention is shown;

[0032] Figure 2 A schematic diagram of the overall structure of a lectern with an external terminal according to an embodiment of the present invention is shown;

[0033] Figure 3 The diagram shows a flowchart of a control method for a lectern that can be connected to an external terminal, according to an embodiment of the present invention.

[0034] Figure 4The diagram shows a flowchart of a control method for a lectern that can be connected to an external terminal, according to an embodiment of the present invention.

[0035] Explanation of icon numbers

[0036] 1. Main body of the lectern; 2. Touch screen; 3. Display screen; 4. Front screen; 5. Lifting module. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the invention to those skilled in the art.

[0039] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0040] When using a lectern with a touchscreen, if a user needs to bring an external mobile device, the device usually needs to be placed on the lectern surface. This can lead to accidental activation of the touchscreen, or the screen being too bright and interfering with the use of the external device. All of this results in a poor user experience.

[0041] Figure 1 A schematic diagram of a lectern with an external terminal connection according to an embodiment of the present invention is shown. Figure 1 As shown, an embodiment of the present invention provides a lectern that can be connected to an external terminal, including a lectern body; the lectern body is equipped with a touch screen and an interface unit; the lectern body is internally equipped with a main control board, a switcher, a power module and a projection screen interface.

[0042] Preferably, the touchscreen is mounted on the surface of the lectern, serving as both the main screen and the operating desktop. As a specific example, the touchscreen is a 21.5-inch screen for optimal viewing and operation.

[0043] In this embodiment, the main control board is connected to the touch screen, the switcher, and the power module, respectively; the switcher is connected to the interface unit, the projection screen interface, and the touch screen, respectively.

[0044] The interface unit is used to provide an interface for external terminal access; the interface unit includes an HDMI interface to be compatible with most external terminals.

[0045] The main control board is configured to, when detecting an external terminal connection to the interface unit, control the switcher to switch the local host projection input to the external terminal projection input; simultaneously, control the power module to cut off the power supply to the touch screen; and, when detecting no external terminal connection to the interface unit, control the switcher to switch the external terminal projection input to the local host projection input; simultaneously, control the power module to restore the power supply to the touch screen.

[0046] In some embodiments, the main control board specifically determines whether an external terminal is connected by monitoring the voltage of the HDMI interface in the interface unit; if the voltage of the HDMI interface is higher than a threshold, it is determined that an external terminal is connected to the interface unit; when the voltage of the HDMI interface is lower than the threshold, it is determined that no external terminal is connected to the interface unit.

[0047] As a specific example of the above embodiments, such as Figure 2 As shown, the main control board includes a microcontroller, a comparator, and a relay; the comparator is connected to the HDMI interface and the microcontroller respectively; the microcontroller is connected to the relay and the switch respectively; the power module is connected to the touch screen through the relay.

[0048] As can be seen, the main control board uses a microcontroller's I / O port to control the relay's on / off state to manage the 12V power supply to the 21.5-inch main screen (i.e., touchscreen); and also uses the microcontroller's I / O port to control the HDMI switch to switch the projection input. Specifically, when the main control board detects that the voltage at the HDMI interface exceeds the threshold (i.e., when an external terminal is connected), it uses the microcontroller's I / O port to simulate a button press on the HDMI switch, switching the switch from local host projection input to external terminal projection input, thus changing the interface display on the large projection screen. At the same time, it also uses the microcontroller's I / O port to control the relay's on / off state to cut off the power to the 21.5-inch main screen, achieving a screen-off function and saving up to 25W of power. When the external desktop terminal is unplugged, the main control board will detect that the voltage is below the threshold, control the switch to switch back to local host output projection, and control the relay to restore power to the main screen.

[0049] The switcher is used to switch the input of the projection screen interface according to the control of the main control board; wherein the input includes the touch screen input and the interface unit input.

[0050] As can be seen, the lectern in this embodiment is equipped with a touch screen, a projection screen, and an interface unit for external terminals to access, enriching the lectern's functionality. In particular, it can automatically switch to projection screen display after an external terminal is connected, eliminating the need for manual operation and making the presentation process more convenient and smoother, thereby optimizing the user experience. Furthermore, when switching to external terminal projection mode, it will also simultaneously turn off the touch screen on the lectern to prevent accidental touches and excessive screen brightness from causing inconvenience to users, further optimizing the user experience while reducing device power consumption and saving energy.

[0051] In some embodiments, the lectern is internally equipped with an industrial control board and a graphics card; all display devices on the lectern are connected to the industrial control board; the industrial control board is also connected to a power module and the graphics card, which in turn is connected to a switcher. The industrial control board acts as the host for all display devices, allowing control of any display device. The switcher has one connection to the industrial control board via the graphics card, and another connection to the HDMI interface of the interface unit. Under the control of the main control board, switching between these two connections enables switching between local host projection input mode and external terminal projection input mode.

[0052] Furthermore, the interface unit also includes multiple interfaces such as a USB interface and a Type-C interface; both the USB interface and the Type-C interface are connected to the industrial control board to enable external devices, such as storage devices and smart terminal devices, to connect to the lectern "host" and be displayed on the display device; at the same time, it can also provide power to the USB interface and the Type-C interface to ensure normal operation of the interface. Preferably, the number of USB interfaces can be multiple, such as two, and the specific number is determined by actual needs.

[0053] In some embodiments, the lectern body is also equipped with an interface module, preferably located at the bottom of the lectern body. The interface module includes an HDMI interface, a network interface, and a mains power input to respectively enable screen projection, network connectivity, and power supply. Specifically, the HDMI interface connects to an external projection screen and an internal switch, allowing the touchscreen interface to be projected via the industrial control board. The mains power input is connected to a power module via a 5-bit PDU to convert mains power into the voltage and current required by the electronic devices. The lectern body also houses a switch to facilitate network connectivity for internal electronic devices and external terminals. Specifically, the network interface connects to an external internet cable and an internal switch; the switch then splits into two paths: one connects to the industrial control board to provide network access for internal electronic devices; the other connects to the interface unit to provide network access for external terminals. This allows for multiple network paths within the lectern body for different devices to connect to. Correspondingly, the interface unit also has a LAN interface for external terminals to connect to the network.

[0054] Figure 3 A schematic diagram of the overall structure of a lectern with an external terminal according to an embodiment of the present invention is shown. Figure 3 As shown, the main body of the lectern 1 is equipped with a touch screen 2 and a display screen 3. The display screen 3 is connected to an industrial control board (not shown in the figure) and is used to play and display required content. Preferably, the display screen 3 is also set on the surface of the lectern. Specifically, it can be set above the touch screen 2 for easier viewing. As a specific example, the display screen 3 is 11.6 inches in size and can be used to display a countdown after the software is opened, and to display prompts when playing PPT.

[0055] In some embodiments, the side of the podium body 1 facing the audience is also equipped with a front screen 4; the front screen 4 is connected to the industrial control board and the graphics card (not shown in the figure). The front screen 3 can display specific content, such as the meeting topic, important notices, etc., so as to avoid the cost of additional banners and achieve a more effective notification effect.

[0056] In some embodiments, the lectern body 1 is further equipped with a lifting module 5 to enable the lectern body to have a lifting function. A microphone (not shown in the figure) and a sub-display screen (not shown in the figure) with a lifting function are also configured on the platform of the lectern body 1. The power module has an intelligent voltage and current monitoring function to ensure stable power supply to all devices on the lectern. The material of the lectern body can be wood or other new synthetic materials, such as alloys. All display devices on the lectern body can be monochrome e-ink screens or curved screens. All display devices support remote control of the displayed content (such as displaying the background and preset speaker information).

[0057] As a specific example, a smart lectern is provided, equipped with a high-performance i7 CPU, 16GB of dual-channel memory, and a solid-state drive for fast system boot. It also features a smart height-adjustable platform and microphone to accommodate users of different heights. Furthermore, it offers four screen options: 11.6-inch (main screen), 12.6-inch (secondary screen), 21.5-inch (main screen / operation desktop), and 27-inch (front screen). The 11.6-inch screen allows for easy viewing of PPT presentations and can be connected to a backstage audio system to display the presentation topic and speaker information comprehensively and efficiently, making it suitable for speeches, meetings, reports, exhibitions, and other occasions. Notably, the smart lectern's bottom HDMI port connects to the desired projection screen, allowing the local host (i.e., the industrial control board) to project its interface. When a mobile terminal is connected to the desktop HDMI port via a data cable, the main control board automatically recognizes and switches to mobile terminal projection, while the 21.5-inch main screen automatically turns off to prevent excessive brightness from affecting the placement and use of the mobile terminal and to reduce power consumption.

[0058] As described above, the externally connected lectern in this embodiment not only integrates multiple display devices and a host computer, supporting multi-screen display, screen operation, and device networking to achieve comprehensive and detailed presentation of speech information and accurate and efficient information transmission; it also features intelligent projection capabilities, intelligently monitoring whether an external terminal is connected and automatically switching between local host projection input and external terminal projection input, eliminating manual operation, enhancing intelligence, and optimizing the presentation effect; furthermore, it turns off the touchscreen when an external terminal is detected, saving energy without affecting the placement and use of the external terminal. Furthermore, it is equipped with an automatically lifting screen and microphone, compatible with various user groups. Therefore, the externally connected lectern of this embodiment achieves multi-screen integration and intelligent control, helping to improve the presentation effect, accurately and efficiently transmit information, and greatly optimize the user experience.

[0059] Please see Figure 4 , Figure 4A flowchart illustrating a control method for a lectern with an external terminal according to an embodiment of the present invention is shown. The control method, based on the aforementioned lectern with an external terminal, includes the following steps:

[0060] When an external terminal is detected to be connected to the interface unit, the local host projection input is switched to the external terminal projection input; at the same time, the power supply to the touch screen is cut off. When no external terminal is detected to be connected to the interface unit, the external terminal projection input is switched to the local host projection input; at the same time, the power supply to the touch screen is restored.

[0061] In some embodiments, if the voltage of the HDMI interface of the interface unit is detected to be higher than a threshold, it is determined that an external terminal is connected to the interface unit; if the voltage of the HDMI interface of the interface unit is detected to be lower than the threshold, it is determined that no external terminal is connected to the interface unit.

[0062] As can be seen, the control method for an externally connected lectern in this embodiment not only integrates multiple display devices and a host, supporting multi-screen display, screen operation, and device networking to achieve comprehensive and detailed presentation of speech information and accurate and efficient information transmission; it also features intelligent projection functionality, capable of intelligently detecting whether an external terminal is connected and automatically switching between local host projection input and external terminal projection input, eliminating manual operation, enhancing intelligence, and optimizing the presentation effect; furthermore, it turns off the touchscreen when an external terminal is detected, saving energy without affecting the placement and use of the external terminal. Furthermore, it is equipped with an automatically lifting screen and microphone, compatible with various user groups. Therefore, the externally connected lectern in this embodiment achieves multi-screen integration and intelligent control, helping to improve the presentation effect, accurately and efficiently transmit information, and greatly optimize the user experience.

[0063] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0064] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0065] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0066] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0067] It should be noted that any reference signs placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0068] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0069] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0070] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0071] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0072] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A lectern that can be connected to an external terminal, characterized in that, It includes a lectern body; the lectern body is equipped with a touch screen and an interface unit; the lectern body is internally equipped with a main control board, a switcher, a power module and a projection screen interface; The main control board is connected to the touch screen, the switcher, and the power module respectively; the switcher is connected to the interface unit, the projection screen interface, and the touch screen respectively. The main body of the lectern is also equipped with a display screen; the main body of the lectern is also equipped with an industrial control board and a graphics card. The switcher is connected to the industrial control board via the graphics card; The industrial control board is connected to the touch screen, the display screen, the graphics card, the main control board, the interface unit, and the power module, respectively. The interface unit includes an HDMI interface; The main control board includes a microcontroller, a comparator, and a relay; the comparator is connected to the HDMI interface and the microcontroller; the microcontroller is connected to the relay and the switch; the power module is connected to the touch screen through the relay. The main control board is configured to determine that an external terminal is connected to the interface unit when the voltage of the HDMI interface in the interface unit is higher than a threshold, and to determine that no external terminal is connected to the interface unit when the voltage of the HDMI interface in the interface unit is lower than a threshold. The main control board is used to control the switcher to switch the local host projection input to the external terminal projection input when an external terminal is detected to be connected to the interface unit; at the same time, it controls the power module to cut off the power supply to the touch screen. Furthermore, when it is detected that no external terminal is connected to the interface unit, the switcher is controlled to switch the external terminal projection input to the local host projection input; at the same time, the power module is controlled to restore power supply to the touch screen.

2. The lectern with an external terminal as described in claim 1, characterized in that, The interface unit also includes a USB interface; the USB interface is connected to the industrial control board.

3. The lectern with an external terminal as described in claim 1, characterized in that, The main body of the lectern is also equipped with a switch; the main body of the lectern is equipped with a network interface; The network interface is connected to the switch; the switch is connected to the interface unit, the industrial control board and the power module respectively.

4. A lectern with an external terminal as described in claim 1, characterized in that, Both the touchscreen and the display screen are located on the platform of the main body of the lectern; the display screen is located above the touchscreen.

5. A lectern with an external terminal as described in claim 1, characterized in that, The main body of the podium is equipped with a front screen on the side facing the audience; the front screen is connected to the industrial control board and the graphics card respectively.

6. A lectern with an external terminal as described in claim 1, characterized in that, The main body of the lectern is equipped with a lifting module, which enables the main body of the lectern to have a lifting function.

7. A control method for a lectern based on any one of claims 1 to 6, characterized in that, Control methods include: When an external terminal is detected to be connected to the interface unit, the local host projection input is switched to the external terminal projection input; at the same time, the power supply to the touch screen is cut off. When no external terminal is detected to be connected to the interface unit, the external terminal projection input is switched to the local host projection input; at the same time, the power supply to the touch screen is restored.

8. The control method as described in claim 7, characterized in that, If the voltage of the HDMI interface of the interface unit is detected to be higher than the threshold, it is determined that an external terminal is connected to the interface unit; if the voltage of the HDMI interface of the interface unit is detected to be lower than the threshold, it is determined that no external terminal is connected to the interface unit.

Images