An infrared laser interactive screen based on Mini-LED and its interaction method

Abstract

This invention proposes an infrared laser interactive screen based on Mini-LED and its interaction method. The interactive screen includes a processing layer, a sensing layer, and a display layer. The sensing layer includes infrared receiving modules disposed between the various pixel display structures of the display layer, capable of receiving external infrared laser signals. The processing layer is connected to the infrared receiving modules of each pixel display structure, and detects the illumination position of the infrared laser signal on the display layer through the infrared receiving modules of each pixel display structure, and controls the display layer to display a recognizable indicator pattern at the illumination position of the infrared laser signal. This invention can achieve precise positioning during interaction, has strong anti-interference capabilities against external factors, and offers rich interactive functions with the screen.

Description

Technical Field

[0001] This invention relates to the field of display device technology, and in particular to an infrared laser interactive screen based on Mini-LED and its interactive method. Background Technology

[0002] In classrooms or conference rooms, when content is presented on a large screen and explained by a speaker, interaction between the speaker and the screen is inevitable. Similarly, in homes or entertainment rooms, where games require only mouse controls, remote interaction between the player and the screen allows for relaxation and provides the same immersive gaming experience as a mouse. Therefore, a method that enables remote interaction with a large screen at a certain distance is particularly needed.

[0003] Currently, a series of laser pointers and laser pointers have appeared on the market, which are somewhat effective for large-screen PowerPoint presentations. Their characteristics include: low cost, reliance on a small laser dot for pointing on the large screen, and limited functionality such as page turning via radio frequency signals. Furthermore, the pointing effect of the laser dot on the screen is not obvious, making them inconvenient to use. Recently, a laser pointer that uses a gyroscope to control the on-screen mouse has also appeared on the market. However, this type of laser pointer is more expensive, and the mouse control is extremely unresponsive, with a delay of 1 to 3 seconds during interaction with the screen. If a small rotation is customized to improve sensitivity, moving the mouse a considerable distance on the screen becomes extremely difficult to control, causing confusion for the presenter. Therefore, the actual effectiveness of this gyroscope-controlled laser pointer is questionable.

[0004] Chinese patent application CN109410696A discloses a method for controlling a virtual laser point with an electronic pointer. The electronic pointer includes a pointer body and a receiver, which establishes a wireless communication connection with the receiver. The method involves four steps: first, collecting the relative movement coordinate data of the pointer body; second, the receiver receiving the relative movement coordinate data; third, the receiver converting the relative movement coordinate data into displacement coordinate values ​​of the laser point according to a preset association; and fourth, controlling the movement of the laser point based on the initial position coordinates and the displacement coordinate values. This method collects the relative movement coordinate data of the pointer body and converts it into laser point movement coordinates using a preset association. However, because many unpredictable movements occur during actual pointer operation, such as a speaker moving around on stage, capturing relative position coordinates becomes extremely difficult, potentially causing program errors. Furthermore, the limited indication function cannot meet the needs of the speaker.

[0005] Invention patent announcement number CN108279838B discloses a remote interaction method for a laser pointer, which mainly involves the following four processes for remote interaction: First, determining the laser point location; second, recognizing the laser point color; third, constructing a mapping relationship model; and fourth, calibrating and training the data. This method has two shortcomings: First, locating the laser point is difficult. Since the third method for capturing the specific location of the laser point relies on its brightness, and some conferences use very large screens where the brightness of some parts of the screen may exceed the brightness of the laser point, this makes laser pointer positioning difficult. Second, judging the laser pointer color based on color value is not very effective. Recognizing the laser point color is easily affected by external interference, leading to functional failure.

[0006] How to achieve simple and effective interaction with large screens, ensuring precise positioning during the interaction process and strong resistance to interference from external factors, while also providing rich interactive functions beyond just indication, has become a pressing issue that needs to be addressed. Summary of the Invention

[0007] This invention proposes an infrared laser interactive screen based on Mini-LED and its interaction method, which can achieve precise positioning during the interaction process, has strong anti-interference ability against external factors, and has rich interactive functions with the screen.

[0008] The present invention adopts the following technical solution.

[0009] An infrared laser interactive screen based on Mini-LED includes a processing layer, a sensing layer, and a display layer. The sensing layer includes an infrared receiving module disposed between each pixel display structure of the display layer, which can receive external infrared laser signals. The processing layer is connected to the infrared receiving modules of each pixel display structure, and detects the illumination position of the infrared laser signal on the display layer through the infrared receiving modules of each pixel display structure, and controls the display layer to display a recognizable indicator pattern at the illumination position of the infrared laser signal.

[0010] The display layer is a full-color Mini-LED screen, and each pixel display structure includes a pixel array composed of red, green and blue Mini-LEDs. Each pixel display structure has an independent coordinate address, conductive electrode and substrate.

[0011] The infrared receiving modules between the various pixel display structures form an infrared receiving module array of the sensing layer. The coordinate address of each infrared receiving module corresponds to the coordinate address of the pixel display structure in which it is located. Each infrared receiving module includes a driving circuit with scanning function for acquiring infrared laser signals.

[0012] The display pixels of the Mini-LED screen are covered with a protective layer; the protective layer is a transparent medium layer that is bonded to the Mini-LED display layer, which is used to protect the screen and play an anti-glare role. At the same time, it serves as a transmission medium for light to pass through and out. It is made of glass, resin or composite film material with an infrared transmittance of 80% to 100% and anti-glare function, with a thickness of 200μm to 400μm and a refractive index of 1.5 to 1.6.

[0013] The processing layer includes a storage module and a processing module, and has data storage function and data processing function. When the processing layer detects the position of the infrared laser signal on the Mini-LED screen, it controls the pixel display structure at the position of the infrared laser signal and the side of that position to display the aperture pattern.

[0014] The external infrared laser signal is emitted by a laser emitting device, which includes an infrared laser diode connected to a modulation circuit.

[0015] When the infrared receiving module receives an infrared laser signal from the outside, it demodulates the infrared laser signal and transmits the demodulated information to the processing layer. The processing layer processes the demodulated information received by the infrared receiving module to determine whether the source of the infrared laser signal is correct, or to operate according to the control instructions in the infrared laser signal.

[0016] The laser emitting device is located at the tip of the laser pen and is used to emit infrared laser signals; the laser pen includes an external triggering device, which is used to input user operation commands, including multiple function keys on the body of the laser pen and a switch button at the end of the pen.

[0017] Each function key has an independent data code. The signal generated by the key activation is modulated, that is, the function key data code is modulated with the carrier wave and emitted through an infrared laser diode. The switch button is a push-button switch, which uses a button to drive a transmission mechanism to open or close the moving contact with the stationary contact, thereby switching the circuit. When the switch is activated, it will continuously emit infrared laser light.

[0018] The laser pointer has four buttons, with the tip pointing upwards: upper left, upper right, lower left, and lower right. The upper left and upper right buttons function like the left and right buttons on a regular mouse. The lower left and lower right buttons control the screen volume up and down. Each button can be used in combination; pressing the upper left and upper right buttons simultaneously switches between different aperture diameters, and pressing the lower left and lower right buttons simultaneously switches the aperture color.

[0019] The display layer uses the following method when switching between different aperture diameters: The display layer is pre-set with several aperture size display settings of different diameters. When the upper left and upper right keys are pressed at the same time, different aperture size display settings are switched, and the aperture size display is switched in a cyclical order with the center point of the previous aperture as the new center.

[0020] The display layer uses the following method when switching the aperture color: the display layer has several different aperture color display settings set in advance. When the lower left and lower right keys are pressed at the same time, different aperture color display settings are switched, so that the aperture colors switch in a cyclical order.

[0021] The method for calculating the aperture center coordinates (X, Y) is as follows: calculate the average value of the infrared laser signal-illuminated area to obtain the centroid coordinates of the pixels in that area, and use this centroid as the center of the aperture. The formula for calculating the average value is as follows:

[0022]

[0023]

[0024] In the formula x i This represents the x-coordinate and y-coordinate of a pixel corresponding to the infrared receiver within the area illuminated by the infrared laser signal. i This represents the y-coordinate of a pixel in the infrared receiver module within the infrared laser signal illumination area, and n represents the number of pixels in the infrared receiver within the infrared laser signal illumination area.

[0025] The effective indoor distance between the laser pointer and the screen display layer is 0-50m; the incident angle of the infrared laser emitted by the laser pointer held by the user and used for screen interaction at the screen display layer is 0° to 90°, and the refraction angle at the screen protective layer is 38.68° to 41.81°; so that the infrared laser can accurately fall into the infrared receiving module of the sensing layer after passing through the screen protective layer.

[0026] The display layer's screen comprises full-color pixels containing red, green, and blue Mini-LEDs. The pixel size ranges from 100μm to 400μm, and the spacing between pixels ranges from 200μm to 400μm. The red Mini-LEDs emit wavelengths from 647nm to 760nm, the green Mini-LEDs from 492nm to 550nm, and the blue Mini-LEDs from 430nm to 455nm. The overall thickness of the display layer ranges from 0.8mm to 1.6mm. The infrared receiving module is a graphene photodetector, a perovskite-based photodetector, or a silicon-based photodetector. The infrared receiving modules are arranged in an infrared receiving module matrix between the full-color pixels. The receiving frequency of the infrared receiving modules is 38kHz, and their receiving wavelength range is 780nm to 980nm.

[0027] An interaction method for an infrared laser interactive screen based on Mini-LED, which uses an infrared laser pointer to interact with the interactive screen described above, includes the following steps;

[0028] Step S1: Activate the Mini-LED infrared laser interactive screen. The aperture pattern automatically hides. The array of infrared receiving modules automatically and at high speed performs infrared scanning from top to bottom, row by row. Only one row is powered on at any given time, so only the intersections on one row can detect infrared signals. The built-in circuit of the processing layer controls the electric field scanning of each row. In each row, the signals received by each column of the infrared receiving module are recorded. Before the electric field moves to the next row, each row resets its received information. Then, the system algorithm of the processing layer combines the activation time of each row with the output of each column to form a complete interactive signal receiving network. At this time, the entire system is in a steady state waiting for the infrared laser signal to be triggered. When the infrared receiving module does not receive an infrared laser signal, it defaults to receiving a high-level signal.

[0029] Step S2: The user turns on the infrared laser pointer. At this time, it continuously outputs a low-level infrared laser signal by default. The infrared laser signal is emitted towards the Mini-LED infrared receiver screen interactive screen. The infrared laser signal passes through the protection layer and is received by the infrared receiver module on the display layer.

[0030] Step S3: Once the infrared receiving module receives a low-level laser signal, it immediately sends the address of the infrared receiving module to the storage module in the processing layer. At the same time, through system addressing, the pixel display structure corresponding to the address of the infrared receiving module changes color, so that an aperture appears at the point where the infrared laser contacts the screen. Move the laser pointer so that the infrared laser signal of the laser pointer is received by different infrared receiving modules, so that the aperture moves with the infrared laser.

[0031] Step S4: After the infrared receiving module receives the low-level infrared laser signal, the processing module in the processing layer will enter an interrupt and wait for the demodulation information to arrive.

[0032] Step S5: When the user presses the function key, the executed operation command is modulated by the internal processing circuit of the laser pointer, then transmitted to the infrared laser interactive screen via the infrared laser signal carrier. It is received and demodulated by the infrared receiving module, and the demodulated information is transmitted to the processing module of the processing layer. The processing module demodulates again to obtain the operation command and calls the coordinate value in the processing layer storage module to match the operation command with the coordinate value, forming the interactive effect displayed on the screen, that is, the user executes the interactive command at the location of the aperture.

[0033] This invention employs a method of controlling the appearance of an indicator aperture on a screen using infrared laser. On the display layer of a Mini-LED infrared laser interactive receiver screen, an infrared receiver with an independent address is positioned next to the full-color Mini-LED pixels. Regardless of the speaker's actions, as long as the laser is projected onto the screen using an infrared laser pointer, it can provide indication, greatly reducing the risk of laser pointer operation errors. It also utilizes the principle of infrared laser signal transmission to achieve rich control functions, greatly satisfying the needs of the speaker.

[0034] This invention employs a combination of infrared laser positioning and addressing positioning for positioning. It utilizes an infrared receiver on a Mini-LED infrared laser interactive receiving screen to achieve precise laser positioning through addressing. Through highly interference-resistant infrared laser positioning, a virtual aperture appears on the screen for indication, and the size and shape of the aperture are adjustable, greatly improving the indicating effect.

[0035] The Mini-LED full-color pixels used in this invention employ a flip-chip structure, which improves screen heat dissipation compared to upright and vertical structures. Furthermore, the absence of electrodes obstructing the light results in higher light emission efficiency, further enhancing the aperture's indicative effect on the screen. Moreover, the aperture size and color are adjustable, ensuring the aperture with indicative and operational functions remains highly visible on any Mini-LED screen, regardless of size or background color. This truly breaks free from operational limitations, allowing users to fully express themselves on stage.

[0036] The advantages of this invention are:

[0037] (1) Strong anti-interference capability and low error rate. The infrared laser beam has a small divergence angle, concentrated beam, and strong electromagnetic interference resistance, which enables accurate transmission of laser information.

[0038] (2) High precision and accurate positioning. The protective layer of the screen is 200μm to 400μm thick and has a refractive index of 1.5 to 1.6. Calculations using incident angles of 0 to 90° yield refraction angles of 38.68° to 41.81°. With a protective layer thickness of 200μm, the displacement distance of the laser on the infrared receiver varies from 160μm to 179μm depending on the incident angle. The infrared laser can be precisely projected onto the infrared receiver.

[0039] (3) Fast response speed, generally between 2ms and 8ms. Since the aperture positioning adopts the system addressing method, the infrared receiving module is quickly matched with the corresponding pixel through addressing, instead of traversing line by line, which greatly improves the response speed and supports ultra-large screens.

[0040] (4) It is feature-rich, supporting not only all the functions of a computer mouse, but also flexible combination key functions. In addition to giving speeches, users can also use the laser pointer to engage in various entertainment activities with the screen. Attached Figure Description

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0042] Appendix Figure 1 This is a front view of the interactive screen of the present invention;

[0043] Appendix Figure 2 This is a schematic diagram of the working optical path of the present invention;

[0044] Appendix Figure 3 This is a schematic diagram of the incident infrared laser signal;

[0045] Appendix Figure 4 This is a schematic diagram of the workflow of the present invention;

[0046] Appendix Figure 5 This is a diagram of a laser pointer;

[0047] In the diagram: 1-Infrared receiver; 2-Pixel display structure; 4-Refracted light; 5-Incident light; 6-Laser pointer; 12-Protective layer; 13-Display layer; 14-Processing layer; 15-Laser emitter; 16-Upper right button; 17-Lower right button; 18-Upper left button; 19-Lower left button; 20-Power button; 21-Red Mini-LED; 22-Green Mini-LED; 23-Blue Mini-LED. Detailed Implementation

[0048] As shown in the figure, an infrared laser interactive screen based on Mini-LED includes a processing layer 14, a sensing layer, and a display layer. The sensing layer includes an infrared receiving module 1 disposed between each pixel display structure 2 of the display layer 13, which can receive external infrared laser signals. The processing layer is connected to the infrared receiving modules of each pixel display structure, and detects the irradiation position of the infrared laser signal on the display layer through the infrared receiving modules of each pixel display structure, and controls the display layer to display a recognizable indicator pattern at the irradiation position of the infrared laser signal.

[0049] The display layer is a full-color Mini-LED screen, and each pixel display structure includes a pixel array composed of red, green and blue Mini-LEDs. Each pixel display structure has an independent coordinate address, conductive electrode and substrate.

[0050] The infrared receiving modules between the various pixel display structures form an infrared receiving module array of the sensing layer. The coordinate address of each infrared receiving module corresponds to the coordinate address of the pixel display structure in which it is located. Each infrared receiving module includes a driving circuit with scanning function for acquiring infrared laser signals.

[0051] The display pixels of the Mini-LED screen are covered with a protective layer 12. The protective layer is a transparent medium layer that is bonded to the Mini-LED display layer. It is used to protect the screen and play an anti-glare role. At the same time, it serves as a transmission medium for light to pass through and out. It is made of glass, resin or composite film material with an infrared transmittance of 80% to 100% and anti-glare function. Its thickness is 200μm to 400μm and its refractive index is 1.5 to 1.6.

[0052] The processing layer includes a storage module and a processing module, and has data storage function and data processing function. When the processing layer detects the position of the infrared laser signal on the Mini-LED screen, it controls the pixel display structure at the position of the infrared laser signal and the side of that position to display the aperture pattern.

[0053] The external infrared laser signal is emitted by the laser emitting device 15, which includes an infrared laser diode connected to a modulation circuit.

[0054] When the infrared receiving module receives an infrared laser signal from the outside, it demodulates the infrared laser signal and transmits the demodulated information to the processing layer. The processing layer processes the demodulated information received by the infrared receiving module to determine whether the source of the infrared laser signal is correct, or to operate according to the control instructions in the infrared laser signal.

[0055] The laser emitting device is located at the tip of the laser pen 6 and is used to emit infrared laser signals; the laser pen includes an external triggering device, which is used to input user operation commands, including multiple function keys on the body of the laser pen and a switch button at the end of the pen.

[0056] Each function key has an independent data code. The signal generated by the key activation is modulated, that is, the function key data code is modulated with the carrier wave and emitted through an infrared laser diode. The switch button is a push-button switch, which uses a button to drive a transmission mechanism to open or close the moving contact with the stationary contact, thereby switching the circuit. When the switch is activated, it will continuously emit infrared laser light.

[0057] The laser pointer has four buttons, with the tip pointing upwards: an upper left button (18), an upper right button (16), a lower left button (19), and a lower right button (17). The upper left and upper right buttons function as the left and right buttons on a regular mouse. The lower left and lower right buttons control the volume up and down of the screen. Each button can be used in combination; for example, pressing the upper left and upper right buttons simultaneously switches between different diameter apertures, and pressing the lower left and lower right buttons simultaneously switches the aperture color.

[0058] The display layer uses the following method when switching between different aperture diameters: The display layer is pre-set with several aperture size display settings of different diameters. When the upper left and upper right keys are pressed at the same time, different aperture size display settings are switched, and the aperture size display is switched in a cyclical order with the center point of the previous aperture as the new center.

[0059] The display layer uses the following method when switching the aperture color: the display layer has several different aperture color display settings set in advance. When the lower left and lower right keys are pressed at the same time, different aperture color display settings are switched, so that the aperture colors switch in a cyclical order.

[0060] The method for calculating the aperture center coordinates (X, Y) is as follows: calculate the average value of the infrared laser signal-illuminated area to obtain the centroid coordinates of the pixels in that area, and use this centroid as the center of the aperture. The formula for calculating the average value is as follows:

[0061]

[0062]

[0063] In the formula x i This represents the x-coordinate and y-coordinate of a pixel corresponding to the infrared receiver within the area illuminated by the infrared laser signal. iThis represents the y-coordinate of a pixel in the infrared receiver module within the infrared laser signal illumination area, and n represents the number of pixels in the infrared receiver within the infrared laser signal illumination area.

[0064] The effective indoor distance between the laser pointer and the screen display layer is 0-50m; the incident angle of the infrared laser emitted by the laser pointer held by the user and used for screen interaction at the screen display layer is 0° to 90°, and the refraction angle at the screen protective layer is 38.68° to 41.81°; so that the infrared laser can accurately fall into the infrared receiving module of the sensing layer after passing through the screen protective layer.

[0065] The display layer's screen comprises full-color pixels including red Mini-LED21, green Mini-LED22, and blue Mini-LED23. The pixel display structure has a size of 100μm to 400μm and a spacing of 200μm to 400μm between each pixel. The red Mini-LED emits wavelengths from 647nm to 760nm, the green Mini-LED from 492nm to 550nm, and the blue Mini-LED from 430nm to 455nm. The overall thickness of the display layer ranges from 0.8mm to 1.6mm. The infrared receiving module is a graphene photodetector, a perovskite-based photodetector, or a silicon-based photodetector. The infrared receiving modules are arranged in an infrared receiving module matrix between the full-color pixels. The receiving frequency of the infrared receiving modules is 38kHz, and their receiving wavelength range is 780nm to 980nm.

[0066] An interaction method for an infrared laser interactive screen based on Mini-LED, which uses an infrared laser pointer to interact with the interactive screen described above, includes the following steps;

[0067] Step S1: Activate the Mini-LED infrared laser interactive screen. The aperture pattern automatically hides. The array of infrared receiving modules automatically and at high speed performs infrared scanning from top to bottom, row by row. Only one row is powered on at any given time, so only the intersections on one row can detect infrared signals. The built-in circuit of the processing layer controls the electric field scanning of each row. In each row, the signals received by each column of the infrared receiving module are recorded. Before the electric field moves to the next row, each row resets its received information. Then, the system algorithm of the processing layer combines the activation time of each row with the output of each column to form a complete interactive signal receiving network. At this time, the entire system is in a steady state waiting for the infrared laser signal to be triggered. When the infrared receiving module does not receive an infrared laser signal, it defaults to receiving a high-level signal.

[0068] Step S2: The user turns on the infrared laser pointer. At this time, it continuously outputs a low-level infrared laser signal by default. The infrared laser signal is emitted towards the Mini-LED infrared receiver screen interactive screen. The infrared laser signal passes through the protection layer and is received by the infrared receiver module on the display layer.

[0069] Step S3: Once the infrared receiving module receives a low-level laser signal, it immediately sends the address of the infrared receiving module to the storage module in the processing layer. At the same time, through system addressing, the pixel display structure corresponding to the address of the infrared receiving module changes color, so that an aperture appears at the point where the infrared laser contacts the screen. Move the laser pointer so that the infrared laser signal of the laser pointer is received by different infrared receiving modules, so that the aperture moves with the infrared laser.

[0070] Step S4: After the infrared receiving module receives the low-level infrared laser signal, the processing module in the processing layer will enter an interrupt and wait for the demodulation information to arrive.

[0071] Step S5: When the user presses the function key, the executed operation command is modulated by the internal processing circuit of the laser pointer, then transmitted to the infrared laser interactive screen via the infrared laser signal carrier. It is received and demodulated by the infrared receiving module, and the demodulated information is transmitted to the processing module of the processing layer. The processing module demodulates again to obtain the operation command and calls the coordinate value in the processing layer storage module to match the operation command with the coordinate value, forming the interactive effect displayed on the screen, that is, the user executes the interactive command at the location of the aperture.

Claims

1. A Mini-LED based infrared laser interactive screen, characterized in that: The interactive screen comprises a processing layer, a sensing layer and a display layer of the screen, the sensing layer comprises infrared receiving modules arranged between each pixel display structure of the display layer and capable of receiving external infrared laser signals; the processing layer is connected with the infrared receiving modules of each pixel display structure, detects the irradiation position of the infrared laser signals on the display layer through the infrared receiving modules of each pixel display structure, and controls the display layer to display identifiable indication patterns at the irradiation position of the infrared laser signals; The display layer is a full-color Mini-LED screen, each pixel display structure of the display layer comprises a pixel point array composed of Mini-LEDs of red, green and blue colors, and each pixel display structure has an independent coordinate address, a conduction electrode and a substrate; The infrared receiving modules between each pixel display structure form an infrared receiving module array of the sensing layer, the coordinate address of each infrared receiving module corresponds to the coordinate address of the pixel display structure where the infrared receiving module is located; each infrared receiving module comprises a driving circuit with a scanning function for acquiring the infrared laser signals; When the display layer switches different diameter apertures, the following method is adopted: the display layer is previously provided with a plurality of aperture size display settings with different diameters, when the upper left key and the upper right key are pressed simultaneously once, different aperture size display settings are switched, and the aperture size display is switched in a circular order with the center point of the aperture above a previous aperture as a new center; When the display layer switches the color of the aperture, the following method is adopted: the display layer is previously provided with a plurality of aperture color display settings with different colors, when the lower left key and the lower right key are pressed simultaneously once, different aperture color display settings are switched, and the aperture color is switched in a circular order; The calculation method of the aperture center coordinate (X, Y) is as follows: the average value of the irradiation area of the infrared laser signals is calculated to obtain the barycentric coordinate of the pixel points in the area, and the barycenter is taken as the center of the aperture, and the formula for calculating the average value is as follows: In the formula, x i represents the x coordinate of a certain pixel point corresponding to the infrared receiver in the infrared laser signal irradiation area, y i represents the y coordinate of a certain pixel point corresponding to the infrared receiving module in the infrared laser signal irradiation area, and n represents the number of pixel points corresponding to the infrared receiver in the infrared laser signal irradiation area.

2. The infrared laser interactive screen based on Mini-LED according to claim 1, characterized in that: The display pixels of the Mini-LED screen are covered with a protective layer; the protective layer is a transparent medium layer attached to the Mini-LED display layer, used for protecting the screen and playing a role of anti-glare, simultaneously serving as a propagation medium for light transmission and emission, prepared from glass, resin or composite film materials with infrared light transmittance of 80% to 100% and anti-glare function, with a thickness of 200 μm to 400 μm and a refractive index of 1.5 to 1.

6. 3.The infrared laser interactive screen based on Mini-LED according to claim 1, wherein: The processing layer comprises a storage module and a processing module, has data storage and processing functions, and controls the pixel display structures at the irradiation position of the infrared laser signals and the pixel display structures at the side of the irradiation position to display aperture patterns after the processing layer detects the irradiation position of the infrared laser signals on the Mini-LED screen.

4. The infrared laser interactive screen based on Mini-LED according to claim 1, characterized in that: The external infrared laser signals are emitted by a laser emitting device, and the laser emitting device comprises an infrared laser diode connected with a modulation circuit. When the infrared receiving module receives the external infrared laser signal, the infrared laser signal is demodulated and the demodulated information is transmitted to the processing layer. The processing layer processes the demodulated information received by the infrared receiving module to determine whether the source of the infrared laser signal is correct or to operate according to the control instructions in the infrared laser signal.

5. The infrared laser interactive screen based on Mini-LED according to claim 4, characterized in that: The laser emitting device is arranged at the tip of the laser pen for emitting infrared laser signals. The laser pen includes an external trigger device for inputting user operation instructions, including a plurality of function keys of the laser pen body and a switch button at the end of the pen part. The function keys have independent data coding, and the signals generated by the triggering of the keys are modulated, that is, the data coding of the function keys and the carrier are modulated and emitted by the infrared laser diode. The switch button is a push button switch that uses the push button to drive the transmission mechanism to make the moving contact and the stationary contact open or close and realize circuit switching. When the switch is started, the infrared laser will be continuously emitted. In the laser pen, the direction of the tip of the laser pen is the upward direction, and the four keys are divided into the upper left key, the upper right key, the lower left key and the lower right key. The upper left key and the upper right key have the functions of the left key and the right key of the daily mouse. The lower left key and the lower right key correspond to the functions of increasing and decreasing the volume of the screen. Each function key can realize the function of combination key, that is, simultaneously pressing the upper left key and the upper right key to switch different diameters of the aperture, and simultaneously pressing the lower left key and the lower right key to switch the color of the aperture.

6. The infrared laser interactive screen based on Mini-LED according to claim 5, characterized in that: The effective indoor distance between the laser pen and the screen display layer is 0-50m. The infrared laser emitted by the laser pen held by the user for screen interaction has an incident angle range of 0° to 90° at the screen display layer, and a refraction angle range of 38.68° to 41.81° at the screen protection layer. After the infrared laser passes through the screen protection layer, it can accurately fall into the infrared receiving module of the sensing layer.

7. The infrared laser interactive screen based on Mini-LED according to claim 1, characterized in that: Each pixel display structure of the screen of the display layer is a full-color pixel point containing a red Mini-LED, a green Mini-LED and a blue Mini-LED. The size of the pixel display structure is 100μm to 400μm, and the distance between each pixel display structure is 200μm to 400μm. The wavelength range of the red Mini-LED is 647nm to 760nm, the wavelength range of the green Mini-LED is 492nm to 550nm, and the wavelength range of the blue Mini-LED is 430nm to 455nm. The thickness of the entire display layer is 0.8mm to 1.6mm. The infrared receiving module is a graphene photodetector, a perovskite-based photodetector or a silicon-based photodetector. The infrared receiving module is arranged between the full-color pixel points to form an infrared receiving module matrix. The receiving frequency of the infrared receiving module is 38KHZ, and the wavelength that can be received is 780nm to 980nm.

8. An interaction method of an infrared laser interaction screen based on Mini-LED, which adopts an infrared laser pen to interact with the interaction screen in claim 4, characterized in that: The steps include: Step S1, start the Mini-LED infrared laser interactive screen, the aperture pattern is automatically hidden, and the array composed of the infrared receiving module automatically performs high-speed infrared scanning from top to bottom row by row. Only one row is powered on at any time, so only the intersection on the row can detect the infrared signal. The built-in circuit of the processing layer will control the electric field scanning of each row. In each row, the signal received by each column through the infrared receiving module will be recorded. Before the electric field moves to the next row, each row will reset its received information, and then the system algorithm of the processing layer will combine the activation time of each row with the output of each column to form a complete interactive signal receiving network. At this time, the entire system is in a steady state waiting for the trigger of the infrared laser signal. When the infrared receiving module does not receive the infrared laser signal, it defaults to receiving a high-level signal; Step S2, the user starts the infrared laser pen. At this time, the default continuous output of the low-level infrared laser signal is aimed at the Mini-LED infrared receiving screen interactive screen to emit the infrared laser signal. The infrared laser signal passes through the protective layer and is received by the infrared receiving module on the display layer; Step S3, once the infrared receiving module receives the low-level laser signal, it immediately sends the address of the infrared receiving module to the storage module in the processing layer, and through system addressing, the pixel display structure with the corresponding address of the infrared receiving module changes color, causing the light circle to appear at the contact between the infrared laser and the screen. Move the laser pen to make the infrared laser signal of the laser pen received by different infrared receiving modules, so that the light circle moves with the infrared laser; Step S4, after the infrared receiving module receives the low-level infrared laser signal, the processing module in the processing layer will enter the interrupt and wait for the arrival of the demodulation information; Step S5, the user presses the function key, and the executed operation instruction is modulated by the internal modulation circuit of the laser pen, and then transmitted to the infrared laser interactive screen through the infrared laser signal carrier. It is received and demodulated by the infrared receiving module, and the demodulation information is transmitted to the processing module of the processing layer. The processing module obtains the operation instruction by demodulating again and calls the coordinate value in the storage module of the processing layer to match the operation instruction with the coordinate value to form the interactive effect displayed on the screen, that is, the user executes the interactive command at the position of the light circle.

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