A visible light communication method and system based on narrow-band nanoluminescent materials

Abstract

The present invention discloses a visible light communication method and system based on narrow-band nano-luminescent materials. The visible light communication method adopts a spectrum optimization calculation method to obtain white light emission spectra with the same color but different spectra, and controls white light LEDs to emit multiple emission spectra. Under the condition that the color and luminous intensity of the luminescent light source remain unchanged, the components and proportions of different narrow-band monochromatic emission spectra in the white light LED are modulated, so that the actual communication band and other lighting bands are mixed and emitted. After adopting a filter of a special light band, a photoelectric detector can detect the information carried by the emitted light signal, and decode and obtain the information. Compared with radio frequency communication and ordinary visible light communication methods, the present invention effectively protects the data transmitted in visible light communication, accurately senses the changes of the alternating dark and bright light of a specific wavelength, realizes the integration of communication and sensing, and has the characteristics of deep modulation, high efficiency, high confidentiality, and expandable application scenarios.

Description

Technical Field

[0001] The present invention belongs to the technical field of visible light communication, and in particular relates to a visible light communication method and system based on narrow-band nano-luminescent materials. Background Art

[0002] In addition to the commonly used microwave signals and radio frequency signals, electromagnetic waves used for information transmission also include light waves. Visible light communication technology using light waves as carriers has the advantages of high confidentiality, no electromagnetic spectrum pollution, and low energy consumption. Modulated light waves can be used as carriers of information and transmitted in space.

[0003] Usually in visible light communication, a small voltage signal is modulated on the basic voltage of the communication light source, so that the light intensity corresponding to the small signal voltage changes alternately, and the digital signal of 0 and 1 can be transmitted. The characteristics of small signal modulation are that the signal change amplitude is small, the bias current of the LED device is small, the LED always works above the threshold, and there will be no state change across the threshold. The device response speed is fast, but the modulation depth of the light source is shallow and the degree of change of the light intensity is not obvious, which limits the high-speed communication under the rated bit error rate. If a large signal modulation with a deeper modulation depth is adopted, the communication LED light source is regulated by a large amplitude signal with a fast change, which will cause the total current of the LED to change across the threshold, thereby making the light signal intensity change more obvious, reducing the communication bit error rate, but the device response speed and stability are required to be higher. Secondly, in order to meet the needs of lighting comfort, the modulation speed of the light source should be higher than the threshold of human eye perception, so that the human eye cannot feel the change of luminous intensity or the flicker of light. Thirdly, the transmission of digital signals is realized through traditional light intensity modulation, and the digital signal can be obtained by using a conventional detector at the receiving end, which is simple and direct. However, the disadvantages of the above-mentioned traditional visible light communication technology are shallow modulation depth, high detection threshold requirements for the receiver, low information confidentiality, flicker at low frequency, and lack of integrated communication and perception functions. Summary of the invention

[0004] The present invention provides a visible light communication method and system based on narrow-band nanoluminescent materials, which can solve the problems of shallow modulation depth, high detection threshold requirement for receivers, low information confidentiality, flicker at low frequency and lack of integrated communication perception function in existing optical communication technology.

[0005] To solve the above problems, the technical solution provided by the present invention is as follows:

[0006] The embodiment of the present invention provides a visible light communication method based on narrow-band nano-luminescent materials, which comprises the following steps:

[0007] Step S1, designing a white light LED light source based on a narrow-band monochromatic spectrum to ensure that the monochromatic spectra emitted by the white light LED light source have high recognizability under any lighting conditions;

[0008] Step S2, selecting the parameters of the lighting color temperature and brightness required by the white light LED light source according to the lighting environment, and setting the lighting conditions for the white light LED light source control system;

[0009] Step S3, performing spectrum optimization calculation according to the ratio transformation of the monochromatic spectrum in the white light LED light source, and obtaining two groups of target luminous spectrum groups with obvious differences and the same correlated color temperature;

[0010] Step S4, switching different luminous spectra by controlling the driving current of the LED chip or the nano-luminescent material;

[0011] Step S5, controlling the modulation frequency of the luminescence spectrum according to the application scenario to achieve visible light signal transmission at a preset rate;

[0012] Step S6, using a detector to detect the optical frequency to achieve data transmission;

[0013] Step S7, obtaining the transmitted data by decoding the optical information result, thereby realizing data analysis and information collection of visible light communication.

[0014] According to an optional embodiment of the present invention, step S5 includes: step S51, using two of the three colors in the three-color spectrum to perform light band regulation: using two identical blue light LED chips to respectively excite two narrow-band nano-luminescent materials, mixing light to produce a three-color spectrum, the mixed light spectrum includes blue light generated by the LED chips and narrow-band monochromatic spectra of the other two colors generated by the narrow-band nano-luminescent materials; by adjusting the driving current of the two blue light LED chips, the luminous intensity of the two narrow-band nano-luminescent materials can be adjusted, and white light mixed light spectra with different ratios can be obtained; based on the three monochromatic spectra, a spectral optimization algorithm is used to calculate the target luminous spectrum to obtain two groups of target luminous spectra with the same color but different spectra; optimizing the luminous brightness of the target luminous spectrum so that the two groups of target The brightness of the target luminous spectrum is consistent, that is, there are two groups of target luminous spectra with the same color, the same brightness and different total luminous spectra; in the actual operation process of dimming the white light LED, first adjust the driving current of the two blue light LED chips so that the actual luminous spectrum is consistent with one of the target luminous spectra, and store the driving current in the form of an array for subsequent reading; continue to adjust the driving current of the two blue light LED chips so that the actual luminous spectrum is consistent with the other group of target luminous spectrum, and store the driving current in the form of an array for subsequent reading; in the visible light communication process, by alternately adjusting the driving current of the two blue light LED chips, the white light luminous spectrum switches back and forth between the two groups of target luminous spectra to emit alternating digital signals.

[0015] According to an optional embodiment of the present invention, step S5 includes: step S52, using three colors in the four-color spectrum to perform light band regulation: using three identical blue light LED chips to respectively excite three narrow-band nanoluminescent materials, mixing light to produce a four-color spectrum, the mixed light spectrum includes blue light and the other three narrow-band monochromatic spectra; by adjusting the driving current of the three blue light LED chips, narrow-band monochromatic spectra with different luminous intensities can be obtained, and white light mixed light spectra with different proportions can be obtained; based on the four monochromatic spectra, a spectrum optimization algorithm is used to calculate the target luminous spectrum; when the spectrum optimization calculation obtains the same color, the same brightness, and the total luminous spectrum After obtaining two different sets of target luminous spectra, adjust the driving currents of two or three of the three blue light LED chips so that the actual luminous spectrum is consistent with one of the target luminous spectra, and store the driving current value for subsequent reading; continue to adjust the driving currents of two or three of the three blue light LED chips so that the actual luminous spectrum is consistent with the other set of target luminous spectra, and store the driving current value for subsequent reading; in the visible light communication process, by adjusting the driving currents of two or three blue light LED chips, the luminous spectrum switches back and forth between the two sets of target luminous spectra to emit alternating digital signals.

[0016] According to an optional embodiment of the present invention, step S52 also includes: the four-color spectrum has three independently adjustable monochromatic spectra, and there are three ways to perform regulation of different bands: Method 1, during the spectrum optimization calculation, one of the monochromatic spectra can be controlled to remain unchanged, and the remaining two monochromatic spectra can be controlled to achieve digital communication, thereby realizing the transmission of digital signals of 0 and 1; Method 2, during the spectrum optimization calculation, the three monochromatic spectra can be simultaneously regulated to achieve the target luminous spectrum, but during communication, only two of the monochromatic spectra are selected each time to represent the digital signals of 0 and 1, thereby realizing simple OOK modulation; Method 3, during the spectrum optimization calculation, the three monochromatic spectra can be simultaneously regulated to achieve the target luminous spectrum, or the three monochromatic spectra can be selected for communication at the same time, and two of the monochromatic spectra can be lit up in turn each time, and the combination of different monochromatic spectra represents different signals, thereby realizing higher-order modulation.

[0017] According to an optional embodiment of the present invention, step S6 includes: step S61, detecting one of the monochromatic lights: before receiving the light signal, the photodetector selects a bandpass filter of the band for filtering; the bandpass filter filters out the stray light band outside the specific band, leaving the light wave signal of the target band, the photodetector counts the number of photons in the target band, and feeds back the generated time-varying photocurrent to the operator respectively; by switching between two groups of target light emitting spectra, the number of photons received by the photodetector changes periodically, and its changes are fed back through the photocurrent; through the demodulation module, the digital signal transmitted by the transmitter can be extracted from the changing photocurrent, and displayed on the oscilloscope, and the transmission signal of the optical communication can be obtained at the computing terminal.

[0018] According to an optional embodiment of the present invention, step S6 includes: step S62, detecting two types of monochromatic light separately: before receiving the light signal, two photodetectors for different monochromatic spectra respectively select bandpass filters corresponding to different monochromatic spectra to filter respectively, filter out the stray light band outside the specific band, and leave the light wave signal of the target band. The two photodetectors respectively count the number of photons in their own target bands; the two photodetectors feed back the generated photocurrent to the operator respectively, and through the switching of two groups of target light emitting spectra, the number of photons received by the two photodetectors changes periodically, and the change is fed back through two groups of photocurrent change data measured by the photodetectors; the demodulation module extracts two groups of digital signals transmitted by the transmitting end from the changing photocurrent, and displays them on the oscilloscope, and obtains the transmission signal of the optical communication at the computing terminal.

[0019] According to an optional embodiment of the present invention, step S6 includes: step S63, detecting the superimposed light of two kinds of monochromatic lights: before receiving the optical signal, the two photodetectors for different monochromatic spectra respectively select the bandpass filters corresponding to the different monochromatic spectra for filtering, and filter out the stray light band outside the specific band, leaving the light wave signal of the target band, and the two photodetectors respectively count the number of photons in their own target bands; the two photodetectors feed back the generated photocurrent to the operator respectively; through the same frequency switching of the two groups of target light emitting spectra, the number of photons received by the two photodetectors changes periodically, and the change of the communication signal is fed back through the superimposed photocurrent; through the demodulation module, the digital signal transmitted by the transmitter can be extracted from the changing superimposed photocurrent, and displayed on the oscilloscope, and the transmission signal of the optical communication can be obtained at the computing terminal.

[0020] The embodiment of the present invention provides a visible light communication system based on narrowband nano-luminescent materials, which includes a transmitting module, a luminous condition module, a spectrum acquisition module, a spectrum switching module, a transmission module, an optical signal acquisition module and an information acquisition module;

[0021] The transmitting module is used to design a white light LED light source based on a narrow-band monochromatic spectrum to ensure that the monochromatic spectra emitted by the white light LED light source have high recognizability under any luminous conditions; the luminous condition module selects the parameters of the lighting color temperature and brightness required by the white light LED light source according to the lighting environment, and sets the luminous conditions for the white light LED light source control system; the spectrum acquisition module is used to perform spectrum optimization calculation according to the proportional transformation of the monochromatic spectrum in the white light LED light source, and obtain two groups of target luminous spectrum groups with obvious differences and the same correlated color temperature; the spectrum switching module is used to switch between different luminous spectra by controlling the driving current of the LED chip or the nano-luminescent material; the transmission module controls the regulation frequency of the luminous spectrum according to the application scenario to realize the transmission of visible light signals at a preset rate; the optical signal acquisition module is used to use a detector to detect the optical frequency to realize data transmission; the information acquisition module is used to obtain the sent data by decoding the optical information results to realize data analysis and information acquisition of visible light communication.

[0022] An embodiment of the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a visible light communication method based on narrow-band nanoluminescent materials as described in the above embodiment is implemented.

[0023] An embodiment of the present invention provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, a visible light communication method based on narrow-band nanoluminescent materials as described in the above embodiment is implemented.

[0024] Compared with the prior art, the embodiments of the present invention provide a visible light communication method and system based on narrow-band nanoluminescent materials, which have the following beneficial effects:

[0025] (1) The use of narrow-band nanoluminescent materials can effectively produce a stable, high-color-purity, and continuously adjustable narrow-band spectrum. Narrow-band filters can be used for identification in the detection of visible light communications, which has extremely high confidentiality.

[0026] (2) In a mixed light spectrum composed of multiple narrow-band monochromatic spectra, encryption effect can be achieved by selecting two narrow-band nanoluminescent materials of different wavelengths to represent different digital signals such as 0 and 1 for optical communication. Only detectors carrying bandpass filters of corresponding wavelengths can identify the narrow-band optical signal. Other detectors cannot identify the components of the digital signal, which has a natural encryption effect.

[0027] (3) The present invention separately regulates the light intensity of several monochromatic spectra in the polychromatic spectrum, and can use the weak and strong signals of different light bands to represent digital signals of 0 and 1, rather than using the change of overall light intensity to represent digital signals of 0 and 1. The above method only requires that there is a difference in the signal intensity of different light bands when identifying the light signal, which avoids the strong change between the light intensity of the LED chip and the light signal detection difficulty caused by the shallow LED modulation depth. That is, the use of the above method can avoid the disadvantage of large signal modulation current changing too much across the threshold, and can also avoid the disadvantage of small signal modulation amplitude being difficult to identify.

[0028] (4) By using a hybrid luminescent film of narrow-band nanoluminescent materials and traditional phosphor materials, a variety of converted lights of different colors can be obtained. On the one hand, this avoids the disadvantage of low color rendering index of traditional white light LEDs based on yellow phosphors, and on the other hand, it ensures the spectrum width and meets the comfort requirements of the human eye.

[0029] (5) The present invention uses a blue LED chip with driving current control to emit light, which can be used in conjunction with a multilayer light conversion material film to achieve white LED light emission with any spectral shape and any light intensity under the condition that the peak wavelength of monochromatic light emission remains unchanged, and has strong adjustability for the white LED spectrum;

[0030] (6) Compared with visible light communication based on multi-chip monochrome LEDs, the advantages of the present invention are: a) The luminous wavelength band of multi-chip monochrome LEDs is relatively fixed, easy to guess, and difficult to achieve encryption effect, while the narrow-band peak wavelength generated by the white light LED based on narrow-band nanoluminescent materials proposed in the present invention is uncertain, and its wavelength band cannot be obtained through observation. b) Due to the quantum confinement effect, based on the continuous adjustable luminous spectrum of narrow-band nanoluminescent materials, multiple sets of continuously adjustable narrow-band spectra in the visible light range can be easily obtained, which has a better expansion effect on encrypted communication in different scenarios.

[0031] (7) From the product perspective, the technical effects and advantages of the technical solution to be protected by the present invention are as follows: the present invention has the characteristics of simple device and low cost, can be widely used in the field of commercial lighting, improves the encryption properties of visible light communication, and lays the foundation for realizing large-area visible light communication.

[0032] (8) The present invention provides optical communication services for specific occasions, such as voice broadcasting, music playing, etc., and does not require high communication bandwidth. Therefore, switching between different light spectra does not require high modulation bandwidth of LED chips and light conversion materials. Micro-LED chips, Mini-LED chips, and high-bandwidth nano-light conversion materials suitable for communication can be selected from commercial materials to achieve the functions of the present invention.

[0033] (9) The technical solution of the present invention fills the technical gap in the industry at home and abroad, and solves the technical problems that people have been eager to solve but have never succeeded: At present, light waves are a kind of electromagnetic waves used for communication in addition to the commonly used microwave signals and radio frequency signals, and have the advantages of high confidentiality, no electromagnetic spectrum pollution, and low energy consumption. Therefore, visible light communication is an auxiliary communication means after radio frequency communication and optical fiber communication means, and is particularly suitable for short-distance space communication between drones and signal light sources. At present, one of the reasons why visible light communication, as an auxiliary means of radio frequency communication, has not been widely used is that the response time of the currently used lighting light source is too long, the modulation bandwidth is too low, and the luminous spectrum under different lighting conditions is different, making it difficult to use the same set of modulation means for regulation. The present invention uses narrow-band nano-luminescent materials for spectral regulation. Compared with traditional lighting sources based on phosphors, the modulation bandwidth of the light source is improved; secondly, the present invention designs a set of luminous modulation means that can effectively dim according to the requirements of different lighting spectra, while meeting the lighting and communication requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 A flowchart of a visible light communication method based on narrow-band nano-luminescent materials is provided for an embodiment of the present application.

[0036] Figure 2 A flowchart of spectral regulation of a target luminescence spectrum of a visible light communication method based on narrow-band nanoluminescent materials is provided for an embodiment of the present application.

[0037] Figure 3 A calculated three-color white light spectrum distribution diagram with the same color but different spectra is provided for the embodiments of the present application. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0039] like Figure 1 As shown, an embodiment of the present invention provides a visible light communication method based on narrow-band nano-luminescent materials, comprising the following steps:

[0040] Step S1, designing a white light LED light source based on a narrow-band monochromatic spectrum to ensure that the monochromatic spectra emitted by the white light LED light source have high recognizability under any lighting conditions;

[0041] Step S2, selecting the parameters of the lighting color temperature and brightness required by the white light LED light source according to the lighting environment, and setting the lighting conditions for the white light LED light source control system;

[0042] Step S3, performing spectrum optimization calculation according to the ratio transformation of the monochromatic spectrum in the white light LED light source, and obtaining two groups of target luminous spectrum groups with obvious differences and the same correlated color temperature;

[0043] Step S4, switching different luminous spectra by controlling the driving current of the LED chip or the nano-luminescent material;

[0044] Step S5, controlling the modulation frequency of the luminescence spectrum according to the application scenario to achieve visible light signal transmission at a preset rate;

[0045] Step S6, using a detector to detect the optical frequency to achieve data transmission;

[0046] Step S7, obtaining the transmitted data by decoding the optical information result, thereby realizing data analysis and information collection of visible light communication.

[0047] The necessity of using narrow-band nano-luminescent materials to prepare light sources in the present invention: To realize this technology, it is necessary to use narrow-band nano-luminescent materials to generate different narrow-band monochromatic luminescence spectra. The effect of the present invention cannot be achieved by using a traditional RGB LED combination. Because, with an ordinary RGB LED combination, the dimming process is a direct dimming for different LED chips. Since the monochromatic spectrum is narrow, the traditional RGB LED monochromatic light combination is single, and the visible light range covered by the spectrum is small. From the technical point of view of spectrum optimization, it is difficult to achieve two groups of target luminescent spectra with the same color but different spectra and the same brightness in RGB LEDs no matter how they are optimized, and therefore it is difficult to achieve the effect of the present invention in multiple usage scenarios. Narrow-band nano-luminescent materials such as perovskites and quantum dots have the characteristics of high modulation bandwidth, high luminous efficiency, high color purity, and adjustable monochromatic spectrum width. Therefore, the spectrum design of the luminescent light source based on narrow-band nano-luminescent materials can effectively realize a high-confidential visible light communication method proposed in the present invention.

[0048] Step S5 includes: step S51, using two colors in the three-color spectrum to control the light band: using two identical blue light LED chips to respectively excite two narrow-band nano-luminescent materials, mixing light to produce a three-color spectrum, the mixed light spectrum includes blue light generated by the LED chips and narrow-band monochromatic spectra of other two colors generated by the narrow-band nano-luminescent materials; by adjusting the driving current of the two blue light LED chips, the luminous intensity of the two narrow-band nano-luminescent materials can be adjusted, and white light mixed light spectra with different ratios can be obtained; based on the three monochromatic spectra, a spectrum optimization algorithm is used to calculate the target luminous spectrum to obtain two groups of target luminous spectra with the same color but different spectra; optimizing the luminous brightness of the target luminous spectrum so that the luminous brightness of the two groups of target luminous spectra is The brightness is consistent, that is, there are two groups of target luminous spectra with the same color, the same brightness, and different total luminous spectra; in the actual operation process of dimming the white light LED, first adjust the driving current of the two blue light LED chips so that the actual luminous spectrum is consistent with one of the target luminous spectra, and store the driving current in the form of an array for subsequent reading; continue to adjust the driving current of the two blue light LED chips so that the actual luminous spectrum is consistent with the other group of target luminous spectra, and store the driving current in the form of an array for subsequent reading; in the visible light communication process, by alternately adjusting the driving current of the two blue light LED chips, the white light luminous spectrum switches back and forth between the two groups of target luminous spectra to emit alternating digital signals.

[0049] Step S5 includes: step S52, using three colors in the four-color spectrum to perform light band regulation: using three identical blue light LED chips to respectively excite three narrow-band nanoluminescent materials, mixing light to produce a four-color spectrum, the mixed light spectrum includes blue light and three other narrow-band monochromatic spectra; by adjusting the driving current of the three blue light LED chips, narrow-band monochromatic spectra with different luminous intensities can be obtained, and white light mixed light spectra with different proportions can be obtained; based on the four monochromatic spectra, a spectrum optimization algorithm is used to calculate the target luminous spectrum; when the spectrum optimization calculation obtains two groups of target colors with the same color, the same brightness and different total luminous spectra After marking the luminous spectrum, adjust the driving currents of two or three of the three blue light LED chips so that the actual luminous spectrum is consistent with one of the target luminous spectra, and store the driving current value for subsequent reading; continue to adjust the driving currents of two or three of the three blue light LED chips so that the actual luminous spectrum is consistent with the other group of target luminous spectra, and store the driving current value for subsequent reading; in the visible light communication process, by adjusting the driving currents of two or three blue light LED chips, the luminous spectrum switches back and forth between the two groups of target luminous spectra to emit alternating digital signals.

[0050] Step S52 also includes: the four-color spectrum has three independently adjusted monochromatic spectra, and there are three ways to regulate different bands: Method 1, when the spectrum is optimized and calculated, one of the monochromatic spectra can be controlled to remain unchanged, and the remaining two monochromatic spectra can be regulated to achieve digital communication and realize the transmission of digital signals of 0 and 1; Method 2, when the spectrum is optimized and calculated, three monochromatic spectra can be regulated at the same time to achieve the target luminous spectrum, but only two of the monochromatic spectra are selected to represent the digital signals of 0 and 1 each time during communication, so as to achieve simple OOK modulation; Method 3, when the spectrum is optimized and calculated, three monochromatic spectra can be regulated at the same time to achieve the target luminous spectrum, or these three monochromatic spectra can be selected at the same time for communication, and two of the monochromatic spectra can be lit up in turn each time, and the combination of different monochromatic spectra represents different signals, so as to achieve higher-order modulation. Method 3 needs to consider the effectiveness of filtering, such as it is easier to achieve the yellow-green light spectrum with the red light spectrum, while it is more difficult to achieve the red-green light spectrum with the yellow light spectrum. The present invention is not limited to the use of three-color and four-color spectra, and other types of spectra with more colors can be used under the condition that the technology allows.

[0051] If three-color or four-color spectrum is used, and more than two groups of target luminous spectra with the same color, the same brightness, and different total luminous spectra are obtained in the spectrum optimization calculation, then the regulation can be performed in a variety of target luminous spectra according to the cycle. For example, one signal can be represented when two groups of special monochromatic spectra exist at the same time, and another signal can be represented when the two groups of special monochromatic spectra exist separately. When the light source is regulated under the condition of a multicolor spectrum, a photodetector carrying different narrow-band filters is also required at the receiving end to detect the signal of the corresponding band. In the process of realizing the above-mentioned technology, obtaining the target luminous spectrum through spectrum optimization is a key technology. In the spectrum optimization, the basis for judging that the spectrum is the same color is that the two groups of luminous spectra are in the same MacAdam ellipse in the color coordinate diagram, and the color temperature is close; the basis for judging that the two groups of luminous spectra have the same brightness is that the total optical power values ​​of the two spectra are consistent; the basis for judging that the spectral distribution of the two groups of luminous spectra is different is that the light intensity of the monochromatic spectrum converted by the narrow-band nano-luminescent material and the same monochromatic spectrum of another group of spectra have obvious amplitude differences that can be distinguished by the photodetector.

[0052] Step S6 includes: Step S61, detecting one of the monochromatic lights: before receiving the optical signal, the photodetector selects a bandpass filter of the band for filtering; the bandpass filter filters out the stray light band outside the specific band, leaving the light wave signal of the target band, the photodetector counts the number of photons in the target band, and feeds back the generated time-varying photocurrent to the operator respectively; by switching between two groups of target luminous spectra, the number of photons received by the photodetector changes periodically, and its change is fed back through the photocurrent; through the demodulation module, the digital signal transmitted by the transmitter can be extracted from the changing photocurrent, and displayed on the oscilloscope, and the transmission signal of the optical communication can be obtained at the computing terminal.

[0053] Step S6 includes: Step S62, detecting two kinds of monochromatic light respectively: before receiving the light signal, two photoelectric detectors for different monochromatic spectra respectively select bandpass filters corresponding to different monochromatic spectra to filter respectively, filter out the stray light band outside the specific band, and leave the light wave signal of the target band. The two photoelectric detectors respectively count the number of photons in their own target bands; the two photoelectric detectors feed back the generated photocurrent to the operator respectively, and through the switching of two groups of target luminescent spectra, the number of photons received by the two photoelectric detectors changes periodically, and the change is fed back through two groups of photocurrent change data measured by the photoelectric detectors; the demodulation module extracts two groups of digital signals transmitted by the transmitting end from the changing photocurrent, and displays them on the oscilloscope, and obtains the transmission signal of the optical communication at the computing terminal.

[0054] Step S6 includes: Step S63, detecting the superimposed light of two monochromatic lights: before receiving the optical signal, two photodetectors with different monochromatic spectra respectively select bandpass filters corresponding to different monochromatic spectra to filter respectively, filter out the stray light band outside the specific band, and leave the light wave signal of the target band. The two photodetectors respectively count the number of photons in their own target bands; the two photodetectors feed back the generated photocurrent to the operator respectively; through the same frequency switching of the two groups of target luminous spectra, the number of photons received by the two photodetectors changes periodically, and the change of the communication signal is fed back through the superimposed photocurrent; through the demodulation module, the digital signal transmitted by the transmitter can be extracted from the changing superimposed photocurrent, and displayed on the oscilloscope, and the transmission signal of the optical communication is obtained at the computing terminal. In the above implementation process, the transmitter needs to add an additional process for processing the spectrum optimization calculation to ensure that the received superimposed signal can just reflect the change trend of the transmitted signal.

[0055] The spectrum control flow chart for achieving the target luminescence spectrum is as follows: Figure 2 As shown. Figure 2As shown, first, under the initialization conditions, according to the existing experimental conditions for preparing multi-color LEDs, the monochromatic spectral distributions S1(λ), ​​S2(λ), S3(λ), ..., S n (λ), where n is an integer such as 1, 2 or 3; λ represents the wavelength of light. Second, set the target correlated color temperature (CCT), the value of which can be set according to the environment. Third, set the initial ratio parameters a1, a2, a3, ..., a n , where a n With S n (λ) corresponds to. Then the total luminescence spectrum can be expressed as

[0056] S(λ)=a1S1(λ)+a2S2(λ)+a3S3(λ)+…+a n S n (λ)

[0057] Fourth, select the spectrum object to be modulated, such as: S1(λ) and S2(λ) can be selected as the monochromatic spectrum to be modulated, that is, during the modulation process, only a1 and a2 need to be changed, and other monochromatic spectrum ratio parameters remain unchanged. Fifth, adjust the monochromatic spectrum ratio parameters in steps, and record the total spectrum S(λ) and its corresponding CCT after each adjustment. Sixth, compare the difference between the current correlated color temperature and the target correlated color temperature. If the difference between the current correlated color temperature and the target correlated color temperature is less than the set threshold, it is determined that the current monochromatic spectrum ratio parameters meet the requirements of the correlated color temperature setting, and the spectrum ratio parameters of all current monochromatic spectra are stored; if the difference between the current correlated color temperature and the target correlated color temperature is less than the set threshold, it is determined that the current monochromatic spectrum ratio parameters do not meet the requirements of the correlated color temperature setting, and the program returns to the fifth step to continue adjusting the monochromatic spectrum ratio parameters. If the spectrum ratio parameters of all current monochromatic spectra are stored in the sixth step, then continue to judge whether the traversal of the monochromatic spectrum ratio parameters is completed. If so, end the program and output the spectrum ratio parameters; if not, continue to return to the fifth step for calculation.

[0058] An embodiment of the present invention provides a visible light communication system based on narrowband nano-luminescent materials, characterized in that it includes a transmitting module, a luminous condition module, a spectrum acquisition module, a spectrum switching module, a transmission module, a light signal acquisition module and an information collection module.

[0059] The transmitting module is used to design a white light LED light source based on a narrow-band monochromatic spectrum to ensure that the monochromatic spectra emitted by the white light LED light source have high recognizability under any luminous conditions; the luminous condition module selects the parameters of the lighting color temperature and brightness required by the white light LED light source according to the lighting environment, and sets the luminous conditions for the white light LED light source control system; the spectrum acquisition module is used to perform spectrum optimization calculation according to the proportional transformation of the monochromatic spectrum in the white light LED light source, and obtain two groups of target luminous spectrum groups with obvious differences and the same correlated color temperature; the spectrum switching module is used to switch between different luminous spectra by controlling the driving current of the LED chip or the nano-luminescent material; the transmission module controls the regulation frequency of the luminous spectrum according to the application scenario to realize the transmission of visible light signals at a preset rate; the optical signal acquisition module is used to use a detector to detect the optical frequency to realize data transmission; the information acquisition module is used to obtain the sent data by decoding the optical information results to realize data analysis and information acquisition of visible light communication.

[0060] An embodiment of the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a visible light communication method based on narrow-band nanoluminescent materials as described in the above embodiment is implemented.

[0061] An embodiment of the present invention provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, a visible light communication method based on narrow-band nanoluminescent materials as described in the above embodiment is implemented.

[0062] The specific embodiment of the experimental preparation method of the applicant using narrow-band nano-luminescent materials to prepare light sources is as follows:

[0063] 1) Use the yellow and red colors in the blue, yellow and red spectrum to control the light band:

[0064] Two identical blue LED chips are used to excite yellow and red narrow-band nanoluminescent materials respectively, and the mixed light produces a three-color spectrum. The mixed light spectrum includes blue light generated by the LED chip and yellow and red narrow-band monochromatic spectra generated by the narrow-band nanoluminescent materials. By adjusting the driving current of the two blue LED chips, the luminous intensity of yellow and red light can be adjusted, and white light mixed light spectra with different ratios can be obtained. Based on the above three monochromatic spectra, the spectral optimization algorithm is used to calculate the target luminous spectrum to obtain the target luminous spectrum S with the same color but different spectra. A (λ) and the target luminescence spectrum S B (λ). Optimize the target luminous spectrum luminescence brightness so that S A (λ) and S BThe brightness of (λ) is consistent. The spectrum optimization calculation results are as follows Figure 3 As shown, there are two groups of target luminous spectra with the same color, the same brightness, and different total luminous spectra.

[0065] In the actual operation process of dimming the white light LED, the driving current of the two blue light LED chips is first adjusted so that the actual luminous spectrum and one of the target luminous spectra S A (λ) is consistent, and the above driving current is stored in array form as [I1] for subsequent reading; the driving current of the two blue light LED chips is continued to be adjusted so that the actual luminous spectrum is consistent with another set of target luminous spectrum S B (λ) is consistent, and the above driving current is stored in array form as [I2] for subsequent reading. In the process of visible light communication, the driving current arrays of the two blue light LED chips are alternately adjusted to [I1] and [I2], so that the white light emission spectrum is within the two sets of target emission spectra S A (λ) and S B (λ) switches back and forth.

[0066] At the photoelectric detection end, the following methods can be used for detection as needed:

[0067] Method 1: Detection of either yellow light or red light. Before receiving the light signal, the photodetector selects the bandpass filter of the yellow light or red light band for filtering. The bandpass filter filters out the stray light band outside the specific band, leaving the light wave signal of the target band. The photodetector then counts the number of photons in its own target band. The photodetector feeds the generated time-varying photocurrent back to the operator. Through the two target luminescence spectra S A (λ) and S B With the switching of (λ), the number of photons received by the photodetector changes periodically, and its changes are fed back through the photocurrent. Through the demodulation module, the digital signal transmitted by the transmitter can be extracted from the changing photocurrent and displayed on the oscilloscope, and the transmission signal of the optical communication can be obtained at the computing terminal.

[0068] Method 2: Before receiving the light signal, the photodetector 1 and the photodetector 2 for yellow light and red light respectively select the bandpass filter 1 and the bandpass filter 2 for filtering. The bandpass filter 1 and the bandpass filter 2 filter out the stray light band outside the specific band, and the remaining light wave signal of the target band. The photodetector 1 and the photodetector 2 then count the number of photons in their own target bands. The photodetector 1 and the photodetector 2 feed back the generated photocurrent to the operator. Through the two target luminescence spectra S A (λ) and S B(λ) is switched, the number of photons received by the two photodetectors changes periodically, and two sets of change data of photodetector 1 and photodetector 2 are fed back through the photocurrent. Through the demodulation module, the two sets of digital signals transmitted by the transmitter can be extracted from the changing photocurrent and displayed on the oscilloscope, and the transmission signal of optical communication can be obtained at the computing terminal.

[0069] Method 3: Before receiving the light signal, the photodetector 1 and the photodetector 2 for yellow light and red light respectively select the bandpass filter 1 and the bandpass filter 2 for filtering. The bandpass filter 1 and the bandpass filter 2 respectively filter out the stray light band outside the specific band, leaving the light wave signal of the target band. The photodetector 1 and the photodetector 2 then count the number of photons in their own target bands. The photodetector 1 and the photodetector 2 feed back the generated photocurrent to the operator respectively. Through the two target luminescence spectra S A (λ) and S B (λ) is switched at the same frequency, the number of photons received by the two photodetectors changes periodically, and the weighted communication signal changes of photodetector 1 and photodetector 2 are fed back through the superimposed photocurrent of photodetector 1 and photodetector 2. Through the demodulation module, the digital signal transmitted by the transmitter can be extracted from the changing superimposed photocurrent, and displayed on the oscilloscope, and the transmission signal of the optical communication can be obtained at the computing terminal. In the implementation of the above method, the transmitter needs to add an additional process for processing the spectrum optimization calculation to ensure that the received superimposed signal can just reflect the changing trend of the transmitted signal.

[0070] 2) Use the green, yellow and red colors in the blue, green, yellow and red spectrum to control the light band:

[0071] Three identical blue LED chips are used to excite three narrow-band nano-luminescent materials, green, yellow, and red, respectively, and the mixed light produces a four-color spectrum. The mixed light spectrum includes blue light generated by the LED chip and three narrow-band monochromatic spectra of green, yellow, and red light generated by the narrow-band nano-luminescent materials. By adjusting the driving current I of the three blue LED chips corresponding to green, yellow, and red light G ,I Y ,I R , we can get green, yellow, and red narrow-band monochromatic spectra S with different luminous intensities G (λ),S Y (λ) and S R (λ), and obtain white light mixed light spectra with different proportions. Based on the above four monochromatic spectra, the spectrum optimization algorithm is used to calculate the target luminous spectrum. When the spectrum optimization calculation obtains two groups of target luminous spectra S with the same color, the same brightness and different total luminous spectra A (λ) and S B(λ), adjust the driving current of two or three of the three blue LED chips so that the actual luminous spectrum is consistent with one of the target luminous spectra S A (λ) is consistent, and the above driving current is stored in array form as [I1] for subsequent reading; continue to adjust the driving current of two or three of the three blue LED chips (such as the driving current of blue LEDs corresponding to yellow-green, red-yellow, red-green, red-yellow-green, etc.) so that the actual luminous spectrum is consistent with another set of target luminous spectrum S B (λ) is consistent, and the above driving current is stored in array form as [I2] for subsequent reading. In the process of visible light communication, by adjusting the driving current of two or three blue light LED chips (such as the driving current of blue light LEDs corresponding to yellow-green, red-yellow, red-green, red-yellow-green, etc.), the luminous spectrum is within the two sets of target luminous spectrum S A (λ) and S B (λ). At the receiving end, if multiple monochromatic luminescence spectra are to be identified, multiple photodetectors with different narrowband filters need to be set up, and before each photodetector receives the light signal, a bandpass filter for a specific band is selected for filtering. The filter filters out the stray light band outside the specific band, leaving the light wave signal of the target band. Different photodetectors then count the number of photons in their own target bands. The photodetectors feed back the generated photocurrent to the operator respectively. By switching the target luminescence spectrum, the number of photons received by different photodetectors changes periodically, and its changes are fed back through the photocurrent. Through the demodulation module, the digital signal transmitted by the transmitter can be extracted from the changing photocurrent and displayed on the oscilloscope, and the transmission signal of the optical communication can be obtained at the computing terminal.

[0072] Unlike the three-color spectrum, the four-color spectrum has three independently adjustable monochromatic spectra. There are three ways to regulate different bands: 1) During the spectrum optimization calculation, one of the monochromatic spectra can be controlled to remain unchanged, and the remaining two monochromatic spectra can be regulated to achieve digital communication, such as using different combinations of yellow-green, red-yellow, red-green, etc. to achieve digital signal transmission of 0 and 1; 2) During the spectrum optimization calculation, the three monochromatic spectra of red, green and yellow can be regulated at the same time to achieve the target luminous spectrum, but during communication, only two of the monochromatic spectra are selected to represent the digital signals of 0 and 1 each time the light is emitted, such as using different combinations of yellow-green, red-yellow, red-green, etc., to achieve simple OOK modulation; 3) During the spectrum optimization calculation, the three monochromatic spectra of red, green and yellow can be regulated at the same time to achieve the target luminous spectrum, or these three monochromatic spectra can be selected for communication at the same time. The specific implementation method is: two of the monochromatic spectra are lit up in turn each time, and the combination of different monochromatic spectra represents different signals, so as to achieve higher-order modulation. The third method needs to consider the effectiveness of filtering. For example, it is easier to filter out the red light spectrum with the yellow-green light spectrum, but it is more difficult to filter out the yellow light spectrum with the red-green light spectrum. The present invention is not limited to the use of three-color and four-color spectra. If the technology allows, other types of spectra with more colors can be used.

[0073] Three-color spectrum example:

[0074] After spectrum optimization calculation, Figure 3An embodiment for a three-color spectrum is given, in which the three monochromatic spectra from left to right are obtained by emitting light from a blue LED, a yellow phosphor, and a red quantum dot. In spectrum 1 represented by a solid line, the ratio of blue, yellow, and red light is 0.1:0.6:0.4, the correlated color temperature is 3530K, and the color rendering index is 78; while in spectrum 2 represented by a dotted line, the ratio of blue, yellow, and red light is 0.1:0.2:0.2, the correlated color temperature is 3485K, and the color rendering index is 92. It is not difficult to see that spectrum 1 and spectrum 2 have obvious identification features from the parameters such as spectral ratio, spectral visual effect, and color rendering index, and the above features can be obtained using a handheld spectrometer. From the perspective of correlated color temperature, the correlated color temperatures of spectrum 1 and spectrum 2 are close to 3500K, the luminous color coordinates are relatively close, and the visual effects of white light are consistent. Therefore, from the perspective of optical communication, the blue light part can be selected as the signal wavelength, and the modulation effect of the blue LED chip has been achieved in the transformation process of spectrum 1 and spectrum 2. In addition, blue light and yellow light can also be selected as the bands carrying light signals. Again, in terms of light sensing, the color rendering index with a large difference can be directly selected as the sensing parameter. During the changes in spectrum 1 and spectrum 2, it is easy to obtain the difference in the color rendering index of white light through traditional testing methods to judge the sensing information. The above-mentioned spectrum synthesis scheme can be well used in daily lighting scenarios to realize multifunctional smart lighting. Secondly, the above-mentioned communication and sensing process is difficult to perceive through the human eye, so it has a higher encryption property, which well realizes a highly confidential visible light communication perception integrated method.

[0075] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered within the protection scope of the present invention. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be based on the scope defined by the claims.

Claims

1. A visible light communication method based on narrow-band nanoluminescent materials, characterized in that: The following steps are involved: Step S1, designing a white light LED light source based on a narrow-band monochromatic spectrum to ensure that the monochromatic spectra emitted by the white light LED light source have high recognizability under any lighting conditions; Step S2, selecting the parameters of the lighting color temperature and brightness required by the white light LED light source according to the lighting environment, and setting the lighting conditions for the white light LED light source control system; Step S3, performing spectrum optimization calculation according to the ratio transformation of the monochromatic spectrum in the white light LED light source, and obtaining two groups of target luminous spectrum groups with obvious differences and the same correlated color temperature; Step S4, switching different luminous spectra by controlling the driving current of the LED chip or the nano-luminescent material; Step S5, according to the application scenario, controlling the modulation frequency of the luminescence spectrum to achieve visible light signal transmission at a preset rate; Step S6, using a detector to detect the optical frequency to achieve data transmission; Step S7, obtaining the transmitted data by decoding the optical information result, thereby realizing data analysis and information collection of visible light communication; Step S5 includes: step S51, using two of the three-color spectrum to perform light band regulation: using two identical blue light LED chips to respectively excite two narrow-band nano-luminescent materials, mixing light to generate a three-color spectrum, the mixed light spectrum includes blue light generated by the LED chip and narrow-band monochromatic spectra of the other two colors generated by the narrow-band nano-luminescent materials; by adjusting the driving current of the two blue light LED chips, the luminous intensity of the two narrow-band nano-luminescent materials can be adjusted, and a white light mixed light spectrum with different ratios can be obtained; on the basis of the three monochromatic spectra, a spectrum optimization algorithm is used to calculate the target luminous spectrum to obtain two groups of target luminous spectra with the same color but different spectra; optimizing the luminous brightness of the target luminous spectrum so that the brightness of the two groups of target luminous spectra is consistent, that is, the two groups of target luminous spectra with the same color, the same brightness and different total luminous spectra; in the actual operation process of dimming the white light LED, firstly adjust the driving current of the two blue light LED chips so that the actual luminous spectrum is consistent with one of the target luminous spectra, and store the driving current in the form of an array for subsequent reading; Continue to adjust the driving current of the two blue light LED chips so that the actual luminous spectrum is consistent with the other set of target luminous spectra, and store the driving current in an array form for subsequent reading. In the visible light communication process, by alternately adjusting the driving current of the two blue light LED chips, the white light luminous spectrum switches back and forth between the two sets of target luminous spectra to emit alternating digital signals.

2. A visible light communication method based on narrow-band nanoluminescent materials according to claim 1, characterized in that: Step S5 includes: step S52, using three colors in the four-color spectrum to perform light band regulation: using three identical blue light LED chips to respectively excite three narrow-band nanoluminescent materials, mixing light to produce a four-color spectrum, the mixed light spectrum includes blue light and three other narrow-band monochromatic spectra; by adjusting the driving current of the three blue light LED chips, narrow-band monochromatic spectra with different luminous intensities can be obtained, and white light mixed light spectra with different proportions can be obtained; based on the four monochromatic spectra, a spectrum optimization algorithm is used to calculate the target luminous spectrum; when the spectrum optimization calculation obtains two groups of target colors with the same color, the same brightness and different total luminous spectra After marking the luminous spectrum, adjust the driving currents of two or three of the three blue light LED chips so that the actual luminous spectrum is consistent with one of the target luminous spectra, and store the driving current value for subsequent reading; continue to adjust the driving currents of two or three of the three blue light LED chips so that the actual luminous spectrum is consistent with the other group of target luminous spectra, and store the driving current value for subsequent reading; in the visible light communication process, by adjusting the driving currents of two or three blue light LED chips, the luminous spectrum switches back and forth between the two groups of target luminous spectra to emit alternating digital signals.

3. A visible light communication method based on narrow-band nanoluminescent materials according to claim 2, characterized in that: Step S52 also includes: the four-color spectrum has three independently adjustable monochromatic spectra, and there are three ways to regulate different bands: Method 1, during the spectrum optimization calculation, one of the monochromatic spectra is controlled to remain unchanged, and the remaining two monochromatic spectra are regulated to achieve digital communication, thereby realizing the transmission of digital signals of 0 and 1; Method 2, during the spectrum optimization calculation, the three monochromatic spectra are simultaneously regulated to achieve the target luminous spectrum, but during communication, only two of the monochromatic spectra are selected each time to represent the digital signals of 0 and 1, thereby realizing simple OOK modulation; Method 3, during the spectrum optimization calculation, the three monochromatic spectra are simultaneously regulated to achieve the target luminous spectrum, or the three monochromatic spectra are selected for communication at the same time, and two of the monochromatic spectra are lit up in turn each time, and the combination of different monochromatic spectra represents different signals, thereby realizing higher-order modulation.

4. The visible light communication method based on narrow-band nanoluminescent materials according to claim 1, characterized in that: Step S6 includes: Step S61, detecting one of the monochromatic lights: before receiving the optical signal, the photodetector selects a bandpass filter of the target band for filtering; the bandpass filter filters out the stray light band outside the specific band, and the light wave signal of the target band remains. The photodetector counts the number of photons in the target band, and feeds back the generated time-varying photocurrent to the operator respectively; by switching between two groups of target luminous spectra, the number of photons received by the photodetector changes periodically, and its change is fed back through the photocurrent; through the demodulation module, the digital signal transmitted by the transmitter can be extracted from the changing photocurrent, and displayed on the oscilloscope, and the transmission signal of the optical communication can be obtained at the computing terminal.

5. The visible light communication method based on narrow-band nano-luminescent materials according to claim 1, characterized in that: Step S6 includes: Step S62, detecting two kinds of monochromatic light respectively: before receiving the light signal, two photoelectric detectors for different monochromatic spectra respectively select bandpass filters corresponding to different monochromatic spectra to filter respectively, filter out the stray light band outside the specific band, and leave the light wave signal of the target band. The two photoelectric detectors respectively count the number of photons in their own target bands; the two photoelectric detectors feed back the generated photocurrent to the operator respectively, and through the switching of two groups of target luminescent spectra, the number of photons received by the two photoelectric detectors changes periodically, and the change is fed back through two groups of photocurrent change data measured by the photoelectric detectors; the demodulation module extracts two groups of digital signals transmitted by the transmitting end from the changing photocurrent, and displays them on the oscilloscope, and obtains the transmission signal of the optical communication at the computing terminal.

6. The visible light communication method based on narrow-band nano-luminescent materials according to claim 1, characterized in that: Step S6 includes: Step S63, detecting the superimposed light of two kinds of monochromatic lights: before receiving the optical signal, two photoelectric detectors with different monochromatic spectra respectively select bandpass filters corresponding to different monochromatic spectra to filter respectively, filter out the stray light band outside the specific band, and the light wave signal of the target band is left. The two photoelectric detectors respectively count the number of photons in their own target bands; the two photoelectric detectors feed back the generated photocurrent to the operator respectively; through the same frequency switching of the two groups of target luminous spectra, the number of photons received by the two photoelectric detectors changes periodically, and the change of the communication signal is fed back through the superimposed photocurrent; through the demodulation module, the digital signal transmitted by the transmitter can be extracted from the changing superimposed photocurrent, and displayed on the oscilloscope, and the transmission signal of the optical communication can be obtained at the computing terminal.

7. A visible light communication system based on narrow-band nanoluminescent materials, characterized in that: It includes an emission module, a light emitting condition module, a spectrum acquisition module, a spectrum switching module, a transmission module, a light signal acquisition module and an information acquisition module; The transmitting module is used to design a white light LED light source based on a narrow-band monochromatic spectrum to ensure that the monochromatic spectra emitted by the white light LED light source have high recognizability under any luminous conditions; the luminous condition module selects the parameters of the lighting color temperature and brightness required by the white light LED light source according to the lighting environment, and sets the luminous conditions for the white light LED light source control system; the spectrum acquisition module is used to perform spectrum optimization calculations based on the proportional transformation of the monochromatic spectra in the white light LED light source, and obtain two groups of target luminous spectrum groups with obvious differences and the same correlated color temperature; the spectrum switching module is used to switch between different luminous spectra by controlling the driving current of the LED chip or the nano-luminescent material; the transmission module controls the regulation frequency of the luminous spectrum according to the application scenario to realize the transmission of visible light signals at a preset rate; the optical signal acquisition module is used to use a detector to detect the optical frequency to realize data transmission; the information acquisition module is used to obtain the sent data by decoding the optical information results obtained, and realize data analysis and information acquisition of visible light communication; The spectrum switching module is used to use two of the three-color spectrum to perform light band regulation: two identical blue light LED chips are used to respectively excite two narrow-band nano-luminescent materials, and the three-color spectrum is generated by mixing the light, and the mixed light spectrum includes the blue light generated by the LED chip and the narrow-band monochromatic spectra of the other two colors generated by the narrow-band nano-luminescent materials; by adjusting the driving current of the two blue light LED chips, the luminous intensity of the two narrow-band nano-luminescent materials can be adjusted, and a white light mixed light spectrum with different ratios can be obtained; on the basis of the three monochromatic spectra, a spectrum optimization algorithm is used to calculate the target luminous spectrum to obtain two groups of target luminous spectra with the same color but different spectra; the luminous brightness of the target luminous spectrum is optimized so that the brightness of the two groups of target luminous spectra is consistent, that is, the two groups of target luminous spectra with the same color, the same brightness and different total luminous spectra; in the actual operation process of dimming the white light LED, the driving current of the two blue light LED chips is first adjusted so that the actual luminous spectrum is consistent with one of the target luminous spectra, and the driving current is stored in an array form for subsequent reading; Continue to adjust the driving current of the two blue light LED chips so that the actual luminous spectrum is consistent with the other set of target luminous spectra, and store the driving current in an array form for subsequent reading. In the visible light communication process, by alternately adjusting the driving current of the two blue light LED chips, the white light luminous spectrum switches back and forth between the two sets of target luminous spectra to emit alternating digital signals.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, a visible light communication method based on narrow-band nano-luminescent materials as described in any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, a visible light communication method based on narrow-band nano-luminescent materials as described in any one of claims 1 to 6 is implemented.

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