Screen projection system and device

Abstract

The present invention relates to the field of infrared transmission signal technology, and discloses a screen projection system and device, including: a controller, a wireless module, and multiple display modules, each display module includes an infrared receiving unit, wherein the controller is connected to the wireless module and the multiple display modules; the wireless module is used to receive a screen projection instruction, and send the screen projection instruction to the controller, the screen projection instruction includes the screen data to be projected; each infrared receiving unit is used to receive an infrared signal, and convert the infrared signal into a frequency value of each infrared receiving unit; the controller is used to obtain the screen projection instruction and the frequency value of each infrared receiving unit, and project the screen data to be projected to the display module to which the infrared receiving unit with the largest frequency value belongs. The present invention can select the screen to be projected for accurate screen projection when there are multiple display screens.

Description

Technical Field

[0001] The present invention relates to the field of infrared transmission signal technology, and in particular to a screen projection system and device. Background Art

[0002] As the penetration rate of smart cockpits in the automotive industry gradually increases, the functions of smart cockpits are becoming more and more abundant, and various applications and ecosystems are gradually infiltrating smart cockpit technology.

[0003] In current automotive electronic equipment, the number of electronic display screens has grown from one central control display screen to multiple displays such as instrument display screen, central control display screen, rear screen, head-up display, ceiling screen, etc., and entertainment systems, conference systems, education systems, etc. have begun to be integrated in smart cockpits, which inevitably avoids the application of mobile terminal screen projection technology. However, in the current market, the application of mobile terminal screen projection is still limited to selecting a device to project the screen under the same WIFI. In the case of multiple screens, multiple screens conflict and cannot be displayed on the specified screen according to the scene requirements. It is often necessary to manually adjust or turn off other screens to keep only the only device that needs to be projected, which is very troublesome. Summary of the invention

[0004] In view of this, the present invention provides a screen projection system and device to solve the problem in the related art that it is difficult to specify a screen for projection when there are multiple screens for projection at the same time.

[0005] In the first aspect, the present invention provides a screen projection system, including: a controller, a wireless module, and multiple display modules, each display module comprising an infrared receiving unit, wherein the controller is connected to the wireless module and the multiple display modules; the wireless module is used to receive a screen projection instruction, and send the screen projection instruction to the controller, the screen projection instruction including data to be projected; each infrared receiving unit is used to receive an infrared signal, and convert the infrared signal into a frequency value of each infrared receiving unit; the controller is used to obtain the screen projection instruction and the frequency value of each infrared receiving unit, and project the data to be projected to the display module to which the infrared receiving unit with the largest frequency value belongs.

[0006] The screen projection system provided by the present invention includes a controller, a wireless module, and multiple display modules. Each display module has an infrared receiving unit. When screen projection is required, the wireless module receives the screen projection instruction and sends it to the controller. After the infrared receiving unit receives the infrared signal, it finally obtains the frequency value after conversion. After the infrared receiving unit outputs the frequency value to the controller, the controller selects the display module with the largest frequency value for screen projection. The screen projection system is suitable for projecting the screen content onto a designated screen when there are multiple display modules in the car. At the same time, the wireless module is used to adopt a wireless screen projection method, and there is no need to install a wiring harness. The goal of the designated screen projection is to be achieved through hardware, reducing the complexity of software logic.

[0007] In an optional embodiment, the screen projection system further includes: a plurality of conversion IC modules, wherein a conversion IC module is respectively connected between the controller and each display module, and the conversion IC module is used to transmit the frequency value to the controller.

[0008] In an optional implementation, each display module includes at least two infrared receiving units.

[0009] In the screen projection system provided by the present invention, each display module includes at least two infrared receiving units, which improves the accuracy and anti-interference of the screen projection of the designated display module when the display module is performing screen projection.

[0010] In an optional embodiment, the infrared receiving unit includes: an infrared photosensor, a voltage-controlled oscillator, and a display controller, wherein the voltage-controlled oscillator is connected to the infrared photosensor and the display controller, respectively; the infrared photosensor is used to receive infrared signals and convert the infrared signals into analog signals; the voltage-controlled oscillator is used to convert the analog signals into PWM signals and send the PWM signals to the display controller; the display controller is used to calculate the frequency value according to the PWM signal and send the frequency value to the controller.

[0011] In the screen projection system provided by the present invention, since the source of the infrared signal is an infrared signal transmitter, the infrared signal frequencies received by different infrared sensors are the same. However, since the infrared sensors are set at different positions, the light intensities of the infrared signals received by different infrared sensors are different. Therefore, it is necessary to convert the light intensity into data with a difference that can be received by the controller. The present application converts the light intensity into a frequency value. When the light intensity of the infrared sensor is large, the larger the output analog signal voltage, the larger the frequency value of the PWM signal output by the voltage-controlled oscillator. The data obtained by pure hardware conversion is more accurate and has strong anti-interference ability.

[0012] In an optional implementation, the infrared photosensor is a thermistor.

[0013] In the projection system provided by the present invention, a thermistor is used in the infrared light-sensitive sensor. After receiving light, the resistance of the thermistor in the display module with a large light intensity is larger, and the voltage output by the circuit in which the thermistor is located is larger.

[0014] In an optional embodiment, the wireless module includes a 5G module, a WiFi module, and an antenna module, wherein the 5G module is connected to the WiFi module and the antenna module, and the WiFi module is connected to the antenna module; the 5G module is used to access the Internet; the WiFi module is used to establish a wireless local area network; and the antenna module is used to transmit signals.

[0015] The screen projection system provided by the present invention comprises a wireless module including a 5G module, a WiFi module and an antenna module. The 5G module is used to access the Internet and can obtain content that can be projected on the Internet. The WiFi module is used to establish a wireless local area network, which is joined to the local area network with various modules to form a whole. When projecting the screen, a display module is selected to join the local area network. The antenna module transmits signals to ensure the stability of the signals of the 5G module and the WiFi module.

[0016] In a second aspect, the present invention provides a screen projection method, characterized in that it is applied to a screen projection system, the screen projection system includes multiple display modules, each display module includes an infrared receiving unit, and the method includes: receiving a screen projection instruction, the screen projection instruction includes data to be projected; receiving the frequency value of the infrared receiving unit in each display module, and projecting the data to be projected to the display module to which the infrared receiving unit has the largest frequency value.

[0017] The screen projection method provided by the present invention is that the display module outputs frequency values ​​of different sizes, and the display module with the largest frequency value is selected based on comparison. The method is applied to multi-screen scenes. When only one screen is used for display, the screen projection can be achieved by using infrared signals to point to the screen to be projected; the method can ensure the accuracy of screen projection by implementing the designated screen projection through the hardware structure.

[0018] In the third aspect, the present invention provides a screen projection device, which is applied to a screen projection system. The screen projection system includes multiple display modules, each display module includes an infrared receiving unit, and the device includes: a screen projection indication receiving module, used to receive the screen projection indication, the screen projection indication includes the screen data to be projected; a screen projection module, used to receive the frequency value of the infrared receiving unit in each display module, and project the screen data to be projected to the display module to which the infrared receiving unit has the largest frequency value.

[0019] In a fourth aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the screen projection method of the above-mentioned second aspect or any corresponding embodiment thereof by executing the computer instructions.

[0020] In a fifth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the screen projection method of the above-mentioned second aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a structural schematic diagram of a screen projection system according to an embodiment of the present invention;

[0023] Figure 2 is a structural schematic diagram of a display module in a screen projection system according to an embodiment of the present invention;

[0024] Figure 3 is a schematic structural diagram of an infrared receiving unit according to an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of a signal transmission process of an infrared receiving unit according to an embodiment of the present invention;

[0026] Figure 5 is a circuit structure diagram of an infrared light sensor according to an embodiment of the present invention;

[0027] Figure 6 is a schematic structural diagram of a wireless module according to an embodiment of the present invention;

[0028] Figure 7 is a flowchart of a screen projection method according to an embodiment of the present invention;

[0029] Figure 8 is a structural schematic diagram of a screen projection device according to an embodiment of the present invention;

[0030] Fig. 9 Schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] Since the number of electronic display screens in current automotive electronic equipment has grown from one central control display screen to multiple displays such as instrument display screen, central control display screen, rear screen, head-up display, etc., and entertainment systems, conference systems, education systems, etc. have begun to be integrated in smart cockpits, which cannot avoid the application of mobile terminal screen projection technology. However, the current market application of mobile terminal screen projection is still limited to selecting a device to project the screen under the same local area network. In the case of multi-screen display, it is impossible to display on the specified screen according to the scene requirements. Therefore, the present application provides a screen projection system to realize that in the scenario of multi-screen operation, the user can specify a specific screen for projection according to his own needs, and other screens do not participate in the screen projection activity.

[0033] According to this embodiment, a screen projection system is provided. It should be noted that the technical features involved in the different implementation modes of the present invention described below can be combined with each other as long as there is no conflict between them.

[0034] This embodiment provides a screen projection system, such as Figure 1 As shown, it includes: a controller 1 , a wireless module 2 , and a plurality of display modules 3 , each display module 3 includes an infrared receiving unit 30 , wherein the controller 1 is connected to the wireless module 2 and the plurality of display modules 3 .

[0035] The wireless module 2 is used to receive a screen projection instruction and send the screen projection instruction to the controller 1. The screen projection instruction includes the screen data to be projected.

[0036] In an optional embodiment, the screen projection instruction is sent by a terminal device. For example, the terminal device may be a mobile phone, a computer, or the like.

[0037] In an optional embodiment, the data to be projected is pictures, videos, etc.

[0038] Each infrared receiving unit 30 is used to receive an infrared signal and convert the infrared signal into a frequency value of each infrared receiving unit 30 .

[0039] In an alternative embodiment, the infrared signal may be sent by any device including an infrared transmitter.

[0040] When the user needs to project the data to be projected to one of the display modules 3, the infrared transmitter will be used to transmit an infrared signal to the designated display module 3, so that the display module 3 that receives the infrared signal plays the data to be projected. However, since the infrared signal will diverge during the propagation process, even if the user controls the infrared transmitter to point to one of the display modules 3 to transmit the infrared signal, the infrared receiving units 30 of the other display modules 3 will receive the infrared signal. At this time, in order to determine the display module 3 designated by the user, it is necessary to calculate the frequency value of the infrared receiving unit 30 in each display module 3, and the display module 3 corresponding to the infrared receiving unit 30 with the largest frequency value is used as the display module 3 executed by the user.

[0041] The controller 1 is used to obtain the screen projection instruction and the frequency value of each infrared receiving unit 30, and project the screen data to be projected to the display module 3 to which the infrared receiving unit 30 with the largest frequency value belongs.

[0042] This embodiment includes a controller 1, a wireless module 2, and multiple display modules 3. Each display module 3 has an infrared receiving unit 30. When screen projection is required, the wireless module 2 receives the screen projection instruction and sends it to the controller 1. After the infrared receiving unit 30 receives the infrared signal, it finally obtains the frequency value after conversion. After the infrared receiving unit 30 outputs the frequency value to the controller 1, the controller 1 selects the display module 3 with the largest frequency value for screen projection. The screen projection system is suitable for projecting the screen content onto a designated screen when there are multiple display modules 3 in the car. At the same time, the wireless module 2 is used to adopt the wireless screen projection method, and there is no need to install a wiring harness. The goal of the designated screen projection is to be achieved through hardware, reducing the complexity of software logic.

[0043] In some optional embodiments, such as Figure 1 As shown, the screen projection system also includes: multiple conversion IC modules 4, and a conversion IC module 4 is respectively connected between the controller 1 and each display module 3, and the conversion IC module 4 is used to transmit the frequency value to the controller 1.

[0044] Specifically, the present embodiment also includes a conversion IC module 4, which is arranged between the display module 3 and the controller 1. Since the frequency value output by the controller 1 cannot be directly obtained by the controller 1, in the embodiment of the present invention, the frequency value is format-converted by the conversion IC module 4 and then transmitted to the controller 1; when the controller 1 performs screen projection, the projection data is first sent to the conversion IC module 4, and the conversion IC module 4 converts the format of the projection data and then transmits it to the display module 3.

[0045] In some optional embodiments, such as Figure 2 As shown, each display module 3 includes at least two infrared receiving units 30 .

[0046] Specifically, each display module 3 includes at least two infrared receiving units 30. Due to the scattering problem of infrared rays and the fact that the screens are relatively close when used for in-car projection, multiple infrared receivers need to be added to each display module 3 to improve the accuracy of projecting the specified screen.

[0047] In some optional embodiments, such as Figure 3 As shown, the infrared receiving unit 30 includes: an infrared photosensor 301, a voltage-controlled oscillator 302, and a display controller 303, wherein the voltage-controlled oscillator 302 is connected to the infrared photosensor 301 and the display controller 303 respectively; the infrared photosensor 301 is used to receive infrared signals and convert the infrared signals into analog signals; the voltage-controlled oscillator 302 is used to convert the analog signals into PWM signals and send the PWM signals to the display controller 303; the display controller 303 is used to calculate the frequency value according to the PWM signal and send the frequency value to the controller 1.

[0048] Specifically, since the source of the infrared signal is an infrared transmitter, the infrared signal frequency received by different infrared photosensors 301 is the same, but the light intensity is different. Therefore, the light intensity needs to be converted into data with a difference that can be received by the controller 1. In the embodiment of the present invention, the light intensity is converted into a frequency value. When the light intensity of the infrared photosensor 301 is large, the output analog signal voltage is larger, and the frequency value of the PWM signal output by the voltage-controlled oscillator 302 is larger. The data obtained through pure hardware conversion is more accurate and has strong anti-interference ability.

[0049] Specifically, Figure 4 The figure shows the working process inside each infrared receiving unit 30 in a display module during screen projection: each infrared receiving unit 30 integrates an infrared photosensor 301 and a voltage-controlled oscillator 302, the infrared photosensor converts the light signal into an analog signal, and the voltage-controlled oscillator 302 converts the analog signal into a PWM signal; the display controller 303 inside the display module 3 collects the PWM signal of each infrared receiving unit 30, calculates the corresponding frequency value, and sends the frequency value of each channel to the controller 1 inside the cockpit through the conversion IC module 4; the controller 1 compares the collected frequency values ​​of the infrared receiving units 30 on each display module 3, and after comparing the maximum value, projects the screen content onto the corresponding display screen.

[0050] In some optional implementations, the infrared photosensor 301 is a thermistor.

[0051] Specifically, the infrared light sensor 301 uses a thermistor. After receiving light, the resistance of the thermistor in the display module 3 with a greater light intensity is greater, and the voltage output by the circuit in which the thermistor is located is greater.

[0052] Specifically, Figure 5 As shown, when the infrared signal passes through the filter and irradiates the positive temperature coefficient thermistor PTC, the thermal effect of the infrared rays acts. The greater the amount of light entering, the higher the PTC problem. The characteristics of the PTC are that as the temperature increases, the resistance value increases, and the output voltage increases. The higher the output voltage, the higher the frequency value of the voltage-controlled oscillator 302. The voltage-controlled oscillator 302 increases in frequency as the input voltage increases.

[0053] In some optional embodiments, such as Figure 6 As shown, the wireless module 2 includes a 5G module 20, a WiFi module 21, and an antenna module 22, wherein the 5G module 20 is connected to the WiFi module 21 and the antenna module 22, and the WiFi module 21 is connected to the antenna module 22; the 5G module 20 is used to access the Internet; the WiFi module 21 is used to establish a wireless local area network; and the antenna module 22 is used to transmit signals.

[0054] Specifically, the wireless module 2 of this embodiment includes a 5G module 20, a WiFi module 21, and an antenna module 22. The 5G module 20 is used to access the Internet and can obtain content that can be projected on the Internet. The WiFi module 21 is used to establish a wireless local area network, which joins the local area network with each module to form a whole. When projecting the screen, the display module 3 is selected to join the local area network; the antenna module 22 transmits signals to ensure the stability of the signals of the 5G module 20 and the WiFi module 21.

[0055] This embodiment also provides a screen projection method, which is applied to a screen projection system. The screen projection system includes multiple display modules, each of which includes an infrared receiving unit, such as Figure 7 As shown, the method includes:

[0056] Step S101: receiving a screen projection instruction, wherein the screen projection instruction includes screen data to be projected;

[0057] Step S102: receiving the frequency value of the infrared receiving unit in each display module, and projecting the data to be projected to the display module to which the infrared receiving unit with the largest frequency value belongs.

[0058] Specifically, in this embodiment, the display module outputs frequency values ​​of different sizes, and after comparison, the display module with the largest frequency value is selected for screen projection. This method is applied to multi-screen scenarios. When only one screen is used for display, screen projection can be achieved by using infrared signals to point to the screen to be projected; this method can ensure the accuracy of screen projection by implementing designated screen projection through hardware structure.

[0059] This embodiment provides a screen projection device, which is applied to a screen projection system. The screen projection system includes multiple display modules, each of which includes an infrared receiving unit, such as Figure 8 As shown, the device comprises:

[0060] A screen projection instruction receiving module 5 is used to receive a screen projection instruction, wherein the screen projection instruction includes the screen data to be projected;

[0061] The screen projection module 6 is used to receive the frequency value of the infrared receiving unit in each display module, and project the screen data to be projected to the display module to which the infrared receiving unit with the largest frequency value belongs.

[0062] The screen projection device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0063] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0064] The embodiment of the present invention also provides a computer device having the above Figure 8 The screen projection device shown.

[0065] See also Fig. 9 , Fig. 9 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Fig. 9 As shown, the computer device includes: one or more processors 50, a memory 60, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Fig. 9 A processor 50 is taken as an example.

[0066] The processor 50 may be a central processing unit, a network processor or a combination thereof. The processor 50 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0067] The memory 60 stores instructions executable by at least one processor 50 so as to enable at least one processor 50 to implement the method shown in the above embodiment.

[0068] The memory 60 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created by the use of a computer device according to the presentation of a small program landing page, etc. In addition, the memory 60 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 60 may optionally include a memory remotely arranged relative to the processor 50, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0069] The memory 60 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 60 may also include a combination of the above types of memory.

[0070] The computer device also includes an input device 70 and an output device 80. The processor 50, the memory 60, the input device 70 and the output device 80 may be connected via a bus or other means. Fig. 9 The example of connecting through bus is taken in the following.

[0071] The input device 70 can receive input digital or character information, and generate key signal input related to the user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator bar, one or more mouse buttons, a trackball, a joystick, etc. The output device 80 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc. The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0072] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0073] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A screen projection system, characterized in that: include: A controller, a wireless module, and a plurality of display modules, each display module comprising an infrared receiving unit, wherein the controller is connected to the wireless module and the plurality of display modules; The wireless module is used to receive a screen projection instruction and send the screen projection instruction to the controller, wherein the screen projection instruction includes the screen data to be projected; Each infrared receiving unit is used to receive an infrared signal and convert the infrared signal into a frequency value of each infrared receiving unit; A controller, used for obtaining the screen projection instruction and the frequency value of each infrared receiving unit, and projecting the screen data to be projected to the display module to which the infrared receiving unit with the largest frequency value belongs; The infrared receiving unit comprises: An infrared light sensor, a voltage-controlled oscillator, and a display controller, wherein the voltage-controlled oscillator is connected to the infrared light sensor and the display controller respectively; The infrared photosensor is used to receive the infrared signal and convert the infrared signal into an analog signal; The voltage-controlled oscillator is used to convert the analog signal into a PWM signal and send the PWM signal to the display controller; The display controller is used to calculate the frequency value according to the PWM signal and send the frequency value to the controller.

2. The system according to claim 1, characterized in that Also includes: Multiple conversion IC modules, A conversion IC module is respectively connected between the controller and each of the display modules, and the conversion IC module is used to transmit the frequency value to the controller.

3. The system according to claim 1, characterized in that include: Each of the display modules includes at least two infrared receiving units.

4. The system according to claim 1, characterized in that include: The infrared photosensor is a thermistor.

5. The system according to claim 1, characterized in that The wireless module includes a 5G module, a WiFi module, and an antenna module, wherein: The 5G module is connected to the WiFi module and the antenna module, and the WiFi module is connected to the antenna module; The 5G module is used to access the Internet; the WiFi module is used to establish a wireless local area network; and the antenna module is used to transmit signals.

6. A screen projection method, characterized in that: Applied to a screen projection system, the screen projection system includes multiple display modules, each display module includes an infrared receiving unit, the infrared receiving unit includes: an infrared photosensor, a voltage-controlled oscillator, and a display controller, wherein the voltage-controlled oscillator is connected to the infrared photosensor and the display controller respectively; the infrared photosensor is used to receive an infrared signal and convert the infrared signal into an analog signal; the voltage-controlled oscillator is used to convert the analog signal into a PWM signal and send the PWM signal to the display controller; the display controller is used to calculate a frequency value according to the PWM signal and send the frequency value to the controller, The method comprises: Receiving a screen projection instruction, wherein the screen projection instruction includes screen data to be projected; The frequency value of the infrared receiving unit in each display module is received, and the screen projection data to be projected is projected to the display module to which the infrared receiving unit with the largest frequency value belongs.

7. A screen projection device, characterized in that: Applied to a screen projection system, the screen projection system includes multiple display modules, each display module includes an infrared receiving unit, the infrared receiving unit includes: an infrared photosensor, a voltage-controlled oscillator, and a display controller, wherein the voltage-controlled oscillator is connected to the infrared photosensor and the display controller respectively; the infrared photosensor is used to receive an infrared signal and convert the infrared signal into an analog signal; the voltage-controlled oscillator is used to convert the analog signal into a PWM signal and send the PWM signal to the display controller; the display controller is used to calculate a frequency value according to the PWM signal and send the frequency value to the controller, The device comprises: A screen projection instruction receiving module, used to receive a screen projection instruction, wherein the screen projection instruction includes the screen data to be projected; The screen projection module is used to receive the frequency value of the infrared receiving unit in each display module, and project the screen data to be projected to the display module to which the infrared receiving unit with the largest frequency value belongs.

8. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the screen projection method described in claim 6 by executing the computer instructions.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the screen projection method described in claim 6.

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