A smart blackboard

Abstract

This application relates to a smart blackboard, comprising: a main screen; and two sub-boards disposed on opposite sides of the main screen; each sub-board includes a sub-board body and an optical touch component, the optical touch component being disposed on the side of the corresponding sub-board body away from the main screen; each optical touch component includes an infrared module and a camera module, the infrared module emitting infrared light onto the main surface of the sub-board body, and the camera module sensing the infrared light; the main screen is electrically connected to the two optical touch components via a communication line to receive the handwriting position data output by them; wherein, the two infrared modules of the two optical touch components are electrically connected via a synchronization signal line, the connection structure of the synchronization signal line being configured to allow the two infrared modules to work at different times. Because the two sub-boards are located on opposite sides of the main screen, and the optical touch components are located on the side of the sub-board body away from the main screen, the main screen and sub-boards remain flush and seamless at the splicing point, resulting in smoother use, a more aesthetically pleasing overall appearance, and a more integrated feel.

Description

Technical Field

[0001] This application belongs to the field of multimedia technology, specifically relating to a smart blackboard. Background Technology

[0002] As smart blackboards become increasingly common in education, the needs for blackboards in educational settings are no longer limited to writing and presentations. To meet these needs, the secondary board of the smart blackboard has been upgraded with interconnectivity, allowing the content written on the secondary board to be synchronized to the main screen and saved.

[0003] Smart blackboards require optical touch components to enable interconnection with the main screen. These components are typically located at the top of the sub-board, with a reflector at the bottom to prevent interference from ground-reflected light. However, the optical touch components have a certain touch height, protruding from the main surface of the sub-board, causing a gap at the junction of the main screen and the sub-board. Utility Model Content

[0004] This application provides a smart blackboard to solve the technical problem of discontinuity at the joint between the main screen and the sub-board.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution: a smart blackboard, comprising: a main screen; two sub-boards disposed on opposite sides of the main screen; each sub-board includes a sub-board body and an optical touch component, the optical touch component being disposed on the side of the sub-board body away from the main screen; each optical touch component includes an infrared module and a camera module, the infrared module being used to emit infrared light onto the main surface of the sub-board body, the camera module being used to sense the infrared light, the main screen being electrically connected to the two optical touch components via a communication line to receive handwriting position data output by them; wherein, the two infrared modules of the two optical touch components are electrically connected via a synchronization signal line, the connection structure of the synchronization signal line being configured to allow the two infrared modules to work at different times.

[0006] According to one embodiment of this application, the sub-plate further includes a vibration sensor, which is disposed on the back of the sub-plate body and electrically connected to the corresponding infrared module.

[0007] According to one embodiment of this application, the optical touch component further includes: a mounting frame disposed on the side of the sub-board body away from the main screen; the camera module includes two cameras, which are located at both ends of the mounting frame and are oriented toward the sub-board body.

[0008] According to one embodiment of this application, the optical touch component further includes a cleaning component, disposed in the mounting frame and corresponding to the camera located at the bottom, for cleaning dust from the surface of the camera.

[0009] According to one embodiment of this application, the cleaning component includes a brush, which is rotatably disposed on the mounting frame to brush away dust from the surface of the camera; and / or, the cleaning component includes a fan for blowing away dust from the surface of the camera.

[0010] According to one embodiment of this application, the mounting frame includes: a frame body extending along the side of the sub-plate body; the infrared module includes a light panel disposed within the frame body along the length of the frame body; two adapters disposed at both ends of the frame body and fixed to the back of the sub-plate body; and two cameras respectively disposed on one of the adapters.

[0011] According to one embodiment of this application, the frame is provided with a mounting groove extending along the side of the sub-plate body, the adapter is provided with a positioning post, the lamp plate is provided with a positioning groove matching the positioning post, the adapter abuts the lamp plate in the mounting groove, and the positioning post passes through the positioning groove, and the side of the frame facing away from the adapter is provided with a fastener that is threadedly connected to the positioning post.

[0012] According to one embodiment of this application, the frame is further provided with a slot extending along the side of the sub-plate body, and the infrared module further includes a filter strip disposed in the slot.

[0013] According to one embodiment of this application, the adapter has a limiting groove that matches the camera, and the camera is embedded in the limiting groove.

[0014] According to one embodiment of this application, the backs of the two sub-panel bodies and the back of the main screen are respectively spliced ​​together by a snap fastener assembly; the backs of the two sub-panels are provided with a first positioning part on the side closer to the main screen, and the back of the main screen is provided with a second positioning part on the side closer to the two sub-panel bodies; when the sub-panel bodies and the main screen are spliced ​​together, the first positioning part and the second positioning part abut against each other.

[0015] The beneficial effects of this application are as follows: The main screen of the smart blackboard can realize functions such as playback, presentation, and interaction. The secondary board can be used for writing and is interconnected with the main screen. Since the two secondary boards are located on both sides of the main screen, and the optical touch component is located on the side of the secondary board away from the main screen, the main screen and the secondary board are flush and without gaps at the splicing point, making use smoother and the overall appearance more flat, beautiful, and integrated. In addition, since the two infrared modules of the two secondary boards are arranged facing each other, in order to avoid interference from the opposing infrared light, the two infrared modules are electrically connected through a synchronization signal line. The connection structure of the synchronization signal line is configured to allow the two infrared modules to work at different times. The timing control design of the synchronization signal line avoids the opposing signal interference caused by the simultaneous operation of the infrared modules on both sides, improving the accuracy and stability of writing recognition on the secondary board. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of the overall structure of the smart blackboard provided in one embodiment of this application; Figure 2 This is a schematic diagram of the frame structure of two infrared modules of the smart blackboard provided in one embodiment of this application; Figure 3 This is an exploded structural diagram of the sub-board of the smart blackboard provided in one embodiment of this application; Figure 4 This is a schematic diagram of the optical touch component of the smart blackboard and its partially enlarged structure according to an embodiment of this application; Figure 5 This is a partial structural diagram of the optical touch component of a smart blackboard provided in an embodiment of this application, wherein one end of the adapter has been removed; Figure 6 This is a partial structural schematic diagram of the adapter and light board of a smart blackboard provided in an embodiment of this application; Figure 7 This is a partial structural schematic diagram of the optical touch component of a smart blackboard provided in an embodiment of this application; Figure 8 This is a partial structural diagram of the back of a smart blackboard provided in an embodiment of this application. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] Please see Figures 1 to 3 , Figure 1 This is a schematic diagram of the overall structure of the smart blackboard provided in one embodiment of this application; Figure 2 This is a schematic diagram of the frame structure of two infrared modules of the smart blackboard provided in one embodiment of this application; Figure 3 This is an exploded structural diagram of the sub-board of the smart blackboard provided in one embodiment of this application.

[0020] One embodiment of this application provides a smart blackboard 10. The smart blackboard 10 includes a main screen 100 and two sub-boards 200. The two sub-boards 200 are disposed on opposite sides of the main screen 100. Each sub-board 200 includes a sub-board body 210 and an optical touch component 220. The optical touch component 220 is disposed on the side of the corresponding sub-board body 210 away from the main screen 100. Each optical touch component 220 includes an infrared module 221 and a camera module 222. The infrared module 221 is used to emit infrared light to the main surface of the sub-board body 210, and the camera module 222 is used to sense the infrared light. The main screen 100 is electrically connected to the two optical touch components 220 through a communication line to receive the handwriting position data output by them. The two infrared modules 221 of the two optical touch components 220 are electrically connected through a synchronization signal line 223. The connection structure of the synchronization signal line 223 is configured to allow the two infrared modules 221 to work at different times.

[0021] The main screen 100 of the smart blackboard 10 of this application can realize functions such as playback, presentation, and interaction. The secondary board 200 can be used for writing and is interconnected with the main screen 100. By setting up an optical touch component 220, when the user writes on the secondary board body 210, the infrared light emitted by the infrared module 221 is blocked by the writing tool and reflected. The camera module 222 acquires the image, and after sensing the change in infrared light, converts the relevant information into handwriting position data and transmits it to the main screen 100 through the communication line. After receiving the handwriting position data, the main screen 100 can display the corresponding handwriting on the screen in real time, realizing the synchronous display of the written content. The main screen 100 can also save and record the written content.

[0022] On the one hand, since the two sub-boards 200 are located on both sides of the main screen 100, and the optical touch component 220 is located on the side of the sub-board body 210 away from the main screen 100, the main screen 100 and the sub-board 200 are flush and without gaps at the splicing point, making the use smoother, the overall appearance more flat and beautiful, and more integrated. On the other hand, in the smart blackboard 10 of this application, the two sub-boards 200 are located on both sides of the main screen 100, and in most usage scenarios, the two sub-boards 200 are located on the left and right sides of the main screen 100. The infrared module 221 is also located on the left and right sides. The changes in infrared light sensed by the camera module 222 are not affected by ground reflection. Therefore, the smart blackboard 10 of this application can eliminate the reflector, reduce structural complexity, and save costs.

[0023] Furthermore, since the two infrared modules 221 of the two sub-boards 200 are arranged facing each other, in order to avoid interference from opposing infrared light, the two infrared modules 221 are electrically connected through a synchronization signal line 223. The connection structure of the synchronization signal line 223 is configured to allow the two infrared modules 221 to work at different times. The timing control design of the synchronization signal line 223 avoids opposing signal interference caused by the simultaneous operation of the infrared modules 221 on both sides, thus improving the accuracy and stability of the writing recognition on the sub-board 200.

[0024] It should be noted that the connection structure of the synchronization signal line 223 allows the two infrared modules 221 to operate at different times through various physical circuit configurations, which are not limited here. For example, the synchronization signal line 223 integrates two signal interlock wires. One end of the signal interlock wire is connected to the enable output terminal of one infrared module 221, and the other end is connected to the disable input terminal of another infrared module 221. This connection structure allows the driving circuit of the other infrared module 221 to be forcibly disabled through the signal interlock wires when the driving circuit of either infrared module 221 is activated. For example, the synchronization signal line 223 integrates a clock signal line, a data signal line, and a latch signal line. The clock output, data output, and latch output of the main control module of the smart blackboard 10 are connected to one end of the clock signal line, data signal line, and latch signal line, respectively. The other end of the clock signal line, data signal line, and latch signal line are connected in parallel to the clock input, data input, and latch input of the two infrared modules 221, respectively. The timing switching of the infrared modules 221 is realized through the circuit control of the main control module.

[0025] It should also be noted that the synchronization signal line 223 can also be equipped with a physical switch. By disconnecting the synchronization signal line 223 from the two infrared modules 221 through the physical switch, the two infrared modules 221 can work simultaneously, improving the accuracy of the handwriting position data acquisition by the camera module 222 of the two sub-boards 200 in the scenario of synchronous writing. The physical switch can be controlled to be turned on and off via the main screen 100.

[0026] In some embodiments, the smart blackboard 10 further includes a main control module and a power supply module. The main control module is electrically connected to the infrared module 221, the camera module 222, and other modules via signal transmission lines. The main control module can control the opening and closing of the infrared module 221 and the camera module 222, and can also analyze and process the images acquired by the camera module 222 to obtain handwriting position data before sending it to the main screen 100 for display and storage. The main control module can be a control module separately configured on the sub-board 200, or it can be an OPS (Open Pluggable Specification) computer of the main screen 100. The power supply module is electrically connected to at least one power-consuming module of the smart blackboard 10 via a power supply line to supply power to the power-consuming module. The power supply module can contain a battery or be directly connected to mains power.

[0027] The two sub-boards 200 on both sides of the main screen 100 can be set symmetrically and have basically the same structure, which is convenient for assembly. The following uses one of the sub-boards 200 as an example to illustrate the structure of the sub-board 200.

[0028] Please continue reading. Figure 3In some embodiments, the sub-board 200 further includes a vibration sensor 230, which is disposed on the back of the corresponding sub-board body 210 and electrically connected to the corresponding infrared module 221. The electrical connection between the vibration sensor 230 and the infrared module 221 includes a direct wiring connection or an electrical connection through the main control module. The vibration sensor 230 can sense the writing vibration of the corresponding sub-board body 210 and transmit a signal to the corresponding infrared module 221 or the main control module, thereby activating the corresponding infrared module 221 to emit infrared light, avoiding unnecessary power consumption caused by the infrared module 221 being constantly lit. The vibration sensor 230 can also identify non-writing vibrations and link with the camera module 222 to prevent accidental touches by other objects from causing misidentification of handwriting. When one side of the vibration sensor 230 detects writing vibration, the infrared module 221 on the same side can transmit a signal through the synchronization signal line 223 to prevent the infrared module 221 on the other side from emitting infrared light, solving the problem of interference between opposing infrared light.

[0029] Please continue reading. Figure 4 , Figure 4 This is a partial enlarged schematic diagram of the optical touch component and its structure of a smart blackboard according to an embodiment of this application. In some embodiments, the optical touch component 220 further includes a mounting frame 240, which is disposed on the side of the corresponding sub-board body 210 away from the main screen 100. The camera module 222 includes two cameras 2221, which are located at both ends of the mounting frame 240 and are positioned facing the corresponding sub-board body 210. The two cameras 2221 can acquire images of the sub-board body 210 from different angles to obtain more comprehensive and accurate writing trajectories and accidental touch recognition.

[0030] Due to the writing requirements of the sub-board body 210, chalk dust will accumulate on the lower camera 2221, obscuring it and affecting the acquisition of handwriting position data. In some embodiments, the optical touch component 220 also includes a cleaning component 250, which is disposed in the mounting frame 240 and corresponds to the bottom camera 2221, for cleaning dust from the surface of the camera 2221. The cleaning component 250 can periodically clean the dust from the surface of the camera 2221, ensuring that the camera 2221 can continuously and stably acquire accurate handwriting position data, thereby improving the overall performance and user experience of the smart blackboard 10.

[0031] The cleaning component 250 can employ various structures to clean dust from the surface of the camera 2221.

[0032] The cleaning component 250 includes a brush 251, which is rotatably mounted on the mounting frame 240 to remove dust from the surface of the camera 2221. The brush head of the brush 251 is made of a soft material that will not scratch the surface of the camera 2221. The brush 251 has a rotating motor that allows it to rotate and remove dust from the surface of the camera 2221. After cleaning, it rotates away from the shooting range of the camera 2221. The brush 251 can be a miniature brush.

[0033] In other embodiments, the cleaning component 250 includes a fan. The fan is mounted on the mounting frame 240, with its air outlet facing the camera 2221 located at the bottom. When the fan is activated, it can blow away chalk dust and other dust accumulated on the surface of the camera 2221.

[0034] Please continue reading. Figure 4 In some embodiments, the mounting frame 240 includes a frame body 241 and two adapters 242. The frame body 241 extends along the side of the sub-plate body 210, and the infrared module 221 includes a light panel 2211, which is disposed within the frame body 241 along its length. The two adapters 242 are disposed at both ends of the frame body 241 and fixed to the back of the sub-plate body 210, and two cameras 2221 are respectively disposed on one adapter 242.

[0035] By extending the frame 241 of the mounting frame 240 along the side of the sub-plate body 210, a structural space for accommodating the infrared module 221 can be formed. The lamp plate 2211 in the infrared module 221 is arranged along the length of the frame 241 to ensure that the infrared light coverage matches the writing area of ​​the sub-plate 200. Two adapters 242 are provided at both ends of the frame 241 and fixed to the back of the sub-plate 200. On the one hand, the adapters 242 can realize the installation and positioning of the camera 2221; on the other hand, the adapters 242 can fix the frame 241 to the back of the sub-plate body 210.

[0036] In addition, the light board 2211 of the infrared module 221 is mounted on the frame 241, and the camera 2221 is mounted on the adapter 242. The combined structure of the frame 241 and the adapter 242 facilitates the modular installation of the optical touch component 220. Specifically, screws can be used to connect the adapter 242 to the back of the sub-board body 210.

[0037] Further, please refer to Figures 5 to 7 , Figure 5 This is a partial structural diagram of the optical touch component of a smart blackboard provided in an embodiment of this application, wherein one end of the adapter has been removed; Figure 6 This is a partial structural schematic diagram of the adapter and light board of a smart blackboard provided in an embodiment of this application; Figure 7This is a partial structural schematic diagram of the optical touch component of a smart blackboard provided in an embodiment of this application. The frame 241 has a mounting groove 2411 extending along the side of the sub-board body 210. The adapter 242 is provided with a positioning post 2421. The lamp board 2211 has a positioning groove 2212 that matches the positioning post 2421. The adapter 242 abuts the lamp board 2211 into the mounting groove 2411, and the positioning post 2421 passes through the positioning groove 2212. A fastener is provided on the side of the frame 241 facing away from the adapter 242 and is threadedly connected to the positioning post 2421.

[0038] A mounting groove 2411 extending along the side of the sub-plate 200 is provided in the frame 241 to accommodate the lamp panel 2211 and limit its displacement. The adapter 242 is equipped with a positioning post 2421, and the lamp panel 2211 has a positioning groove 2212 adapted to the positioning post 2421. Initial alignment and rapid installation of the lamp panel 2211 and adapter 242 are achieved by inserting the positioning post 2421 into the positioning groove 2212. The adapter 242 abuts the lamp panel 2211 within the mounting groove 2411 to form a fixed connection. After the positioning post 2421 passes through the positioning groove 2212, the side of the frame 241 facing away from the adapter 242 is threadedly engaged with the positioning post 2421 by a fastener (not shown in the figure), further achieving the positioning of the lamp panel 2211 and the relative fixation of the frame 241 and adapter 242. The fastener can be a screw, and the positioning post 2421 has a threaded groove in the middle.

[0039] For further information, please refer to [link / reference]. Figure 5 The frame 241 also has a slot 2412 extending along the side of the sub-plate body 210. The infrared module 221 also includes a filter strip 2213, which is disposed within the slot 2412. The extension direction of the filter strip 2213 is consistent with the extension direction of the lamp board 2211. The filter strip 2213 is installed on the infrared light transmission path of the lamp board 2211, effectively blocking stray light in the ambient light that interferes with the infrared light. The size of the filter strip 2213 must match the slot 2412 to ensure installation stability. The slot 2412 structure fixes the filter strip 2213 in a specific position, preventing its performance from degrading due to vibration or displacement, while also simplifying the assembly process.

[0040] Please continue reading. Figure 6In some embodiments, the adapter 242 has a limiting groove 2422 that matches the camera 2221, and the camera 2221 is embedded in the limiting groove 2422. The limiting groove 2422 on the adapter 242 matches the structure of the camera 2221. The structural design of the limiting groove 2422 can constrain the bottom and sides of the camera 2221 through the groove structure, which can effectively improve the installation stability of the camera 2221 and avoid displacement problems caused by vibration or external force. At the same time, the embedded installation method keeps the camera 2221 flush with the surface of the adapter 242, reduces the risk of interference caused by the protrusion of the camera 2221, and improves the service life of the camera 2221.

[0041] Specifically, after the camera 2221 is embedded in the limiting groove 2422, it forms a stable connection with the adapter 242, which can be achieved by means of buckle, adhesive or screw fixation.

[0042] In some embodiments, please continue reading Figure 3 The mounting frame 240 also includes a side baffle 243, which is wrapped around the frame 241 on the side opposite to the sub-plate body 210. The side baffle 243 protects the frame 241 and its internal structure.

[0043] Please continue reading. Figure 8 , Figure 8 This is a partial structural diagram of the back of a smart blackboard provided in one embodiment of this application. In some embodiments, the backs of the two sub-board bodies 210 and the back of the main screen 100 are respectively spliced ​​together by a snap fastener assembly 260. The sub-board bodies 210 and the main screen 100 are connected at the back by the snap fastener assembly 260, ensuring that the front main plane is flush and without gaps. The optical touch component 220 is located on the side of the sub-board body 210 away from the main screen 100, that is, on both sides of the smart blackboard 10 as a whole, making the smart blackboard 10 more integrated.

[0044] In some embodiments, a first positioning part 271 is provided on the back of the two sub-panels 200 on the side near the main screen 100, and a second positioning part 272 is provided on the back of the main screen 100 on the side near the two sub-panel bodies 210. When the sub-panel bodies 210 and the main screen 100 are spliced ​​together, the first positioning part 271 and the second positioning part 272 abut against each other. By forming a contact engagement between the first positioning part 271 on the back of the sub-panel 200 and the second positioning part 272 on the back of the main screen 100 during splicing, the initial positioning of the sub-panels 200 and the main screen 100 during splicing can be improved, thereby increasing installation efficiency and accuracy.

[0045] Specifically, the sub-panel body 210 can be a honeycomb panel, which is lightweight and possesses good strength and stability. Of course, the sub-panel body 210 can also be made of other materials, which are not limited here.

[0046] It should be noted that the terms "horizontal" and "vertical" do not imply that the components must be absolutely horizontal or vertical, but rather that they can be slightly tilted. Similarly, the terms "parallel" and "perpendicular" do not imply that the components are absolutely parallel or perpendicular, but rather that they can have a certain angular deviation. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted. In addition, the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships that are commonly used when the product of this application is in use. They are only for the purpose of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] It is understood that in this document, "multiple" means at least two, such as two, three, etc., unless otherwise specified. Furthermore, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. The term "and / or" merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0048] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A smart blackboard, characterized in that, include: Home screen; Two sub-boards are disposed on opposite sides of the main screen; each sub-board includes a sub-board body and an optical touch component, the optical touch component being disposed on the side of the sub-board body away from the main screen; each optical touch component includes an infrared module and a camera module, the infrared module being used to emit infrared light onto the main surface of the sub-board body, and the camera module being used to sense the infrared light; the main screen is electrically connected to the two optical touch components via a communication line to receive the handwriting position data output by them; The two infrared modules of the two optical touch components are electrically connected via a synchronization signal line, and the connection structure of the synchronization signal line is configured to allow the two infrared modules to work at different times.

2. The smart blackboard according to claim 1, characterized in that, The sub-plate also includes a vibration sensor, which is disposed on the back of the sub-plate body and electrically connected to the corresponding infrared module.

3. The smart blackboard according to claim 1, characterized in that, The optical touch component also includes: The mounting frame is located on the side of the sub-board body away from the main screen; the camera module includes two cameras, which are located at both ends of the mounting frame and are oriented towards the sub-board body.

4. The smart blackboard according to claim 3, characterized in that, The optical touch component also includes: A cleaning component is provided in the mounting frame and is positioned corresponding to the camera located at the bottom, for cleaning dust from the surface of the camera.

5. The smart blackboard according to claim 4, characterized in that, The cleaning component includes a brush rotatably mounted on the mounting frame to brush away dust from the camera surface; and / or, the cleaning component includes a fan for blowing away dust from the camera surface.

6. The smart blackboard according to claim 3, characterized in that, The mounting frame includes: The frame extends along the side of the sub-plate body, and the infrared module includes a lamp plate, which is disposed within the frame along the length of the frame. Two adapters are located at both ends of the frame and fixed to the back of the sub-plate body, and the two cameras are respectively mounted on one of the adapters.

7. The smart blackboard according to claim 6, characterized in that, The frame has a mounting groove extending along the side of the sub-plate body. The adapter has a positioning post. The lamp plate has a positioning groove matching the positioning post. The adapter holds the lamp plate against the mounting groove, and the positioning post passes through the positioning groove. The side of the frame facing away from the adapter has a fastener that is threadedly connected to the positioning post.

8. The smart blackboard according to claim 7, characterized in that, The frame also has a slot extending along the side of the sub-plate body, and the infrared module also includes a filter strip, which is disposed in the slot.

9. The smart blackboard according to claim 6, characterized in that, The adapter has a limiting groove that matches the camera, and the camera is embedded in the limiting groove.

10. The smart blackboard according to claim 1, characterized in that, The backs of the two sub-panels are spliced ​​to the back of the main screen via a snap fastener assembly. The backs of the two sub-panels have a first positioning part on the side closer to the main screen, and the back of the main screen has a second positioning part on the side closer to the two sub-panels. When the sub-panels and the main screen are spliced ​​together, the first positioning part and the second positioning part abut against each other.

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