A high-confidential lighting sensor integration method and system

Abstract

The present invention discloses a high-confidentiality lighting sensor integration method and system, the lighting sensor integration system comprises a controller, a transmitting end, a receiving end, a feedback end, a signal merging module, an operator and a screen module: the transmitting end comprises a plurality of blue light LED chip modules and a plurality of narrow-band nano-luminescent material modules, the receiving end comprises a plurality of demodulation modules and a plurality of detector modules; the operator demodulates the digital signal provided by the signal merging module, and obtains the corresponding original audio and text signals; the feedback end is used for the screen module to set the controller, and input the relevant color temperature and other luminescence information of the white light spectrum; the coordinated work of the various functional modules of the lighting sensor integration system can realize the high-confidentiality lighting sensor integration, and realize the characteristics of deep modulation, high efficiency, high confidentiality and expandable application scenarios.

Description

Technical Field

[0001] The invention belongs to the technical field of visible light sensing, and in particular relates to a highly confidential lighting sensing integration method and system. 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 sensing, a small voltage signal is modulated on the basic voltage of the sensing light source, so that the luminous 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 luminous intensity is not obvious, which limits the switching speed of the sensing information. If a large signal modulation with a deeper modulation depth is adopted, and a large amplitude signal regulation with a fast change is implemented on the communication LED light source, the total current of the LED will change across the threshold, thereby making the change of the light signal intensity more obvious, reducing the accuracy of the sensing information, and requiring higher device response speed and stability. Secondly, in order to meet the needs of lighting comfort, the modulation speed of the light source should be higher than the threshold of the human eye, so that the human eye cannot feel the change of luminous intensity or the flicker of light. Thirdly, the signal sensing is realized by 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 sensing 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] In order to solve the above problems, the present invention provides a highly confidential lighting sensor integration method and system.

[0005] The technical solution adopted by the present invention is: a highly confidential lighting sensor integration method, comprising the following steps:

[0006] Step S1, using the screen module to set the controller and input the luminous information of the white light spectrum of the correlated color temperature;

[0007] Step S2, the controller optimizes and calculates the target white light spectrum to obtain two or more groups of target luminous spectra with obvious spectral distinguishing characteristics under the conditions of the same luminous color and luminous brightness;

[0008] Step S3, after determining the target luminous spectrum, the controller continues to calculate and obtains control information of the blue LED chip current;

[0009] Step S4, the controller controls the current of the plurality of blue LED chips to drive the blue LED chips to emit light, and excites the narrow-band nano-luminescent material to emit a narrow-band spectrum of a specific wavelength, so that it can be better distinguished from other broadband spectra for lighting;

[0010] Step S5, the controller performs frequency control on the luminous spectrum on the basis of realizing the luminous spectrum, so as to realize the switching of two groups of luminous spectrum at a certain frequency; during the spectrum switching process, one or several monochromatic spectra in the multicolor spectrum change significantly, thereby realizing the modulation of the monochromatic spectrum;

[0011] Step S6, introducing a filter at the detection end to filter out stray bands, and then using a detector to obtain the change characteristics of the target band optical signal;

[0012] Step S7, decode the content of the data sent by optical communication through the operator and transmit it to the screen module.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] The embodiment of the present invention further provides a high-confidentiality lighting sensor integrated system, which is used to implement a high-confidentiality lighting sensor integrated method as in the above embodiment, wherein the system includes a controller, a transmitting end, a receiving end, a feedback end, a signal merging module, an operator and a screen module;

[0017] The controller is used to control the current of multiple blue light LEDs, drive the blue light LEDs to emit light, and stimulate the narrow-band nano-luminescent material to emit a narrow-band spectrum of a specific band, and mix several narrow-band spectra to form multiple groups of white light spectra with the same luminous color but different spectra; the white light spectrum contains multiple narrow-band monochromatic luminescent spectra with obvious peak characteristics, and carries a light sensing signal in one or more of the narrow-band spectra, which can better distinguish other broadband spectra for lighting; the transmitting end includes multiple blue light LED chip modules and multiple narrow-band nano-luminescent material modules, the multiple blue light LED chip modules are used to emit blue light, and the multiple narrow-band nano-luminescent material modules are used to realize light conversion and realize narrow-band monochromatic luminescent spectra of different light bands;

[0018] The receiving end includes multiple demodulation modules and multiple detector modules. The multiple demodulation modules are used to generate target luminescence spectra for communication and sensing, and the multiple detector modules are used for filtering and identifying light signals of different luminescence bands at the receiving end; the operator demodulates the signal according to the digital signal provided by the signal merging module, and obtains the corresponding original audio and text signals; the screen module is used to set luminescence parameters, obtain communication data and other results; the feedback end is used for the screen module to set the controller and input the relevant color temperature and other luminescence information of the white light spectrum.

[0019] According to an optional embodiment of the present invention, it also includes a dimming operation module, a blue light LED dimming module and a storage module; the dimming operation module is used to calculate dimming parameters such as the driving current of the blue light LED chip; the blue light LED dimming module is used to adjust the driving current and light-emitting frequency of different blue light LED chips; the storage module is used to store the actual light-emitting spectrum, the target light-emitting spectrum, and the numerical value of the driving current of the blue light LED chip to facilitate subsequent reading; the signal merging module is used to summarize and analyze the signals of different light detection modules to obtain valid digital signal data, and the demodulation module is a filter.

[0020] An embodiment of the present invention also 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 high-confidentiality lighting sensor integration method as in the above embodiment is implemented.

[0021] An embodiment of the present invention further 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 highly confidential lighting sensor integration method as described in the above embodiment is implemented.

[0022] Compared with the prior art, the embodiments of the present invention provide a highly confidential lighting sensor integrated method and system, which has the following beneficial effects:

[0023] (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 visible light sensing, which has extremely high confidentiality.

[0024] (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.

[0025] (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.

[0026] (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.

[0027] (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;

[0028] (6) Compared with the visible light sensor based on multi-chip monochrome LED, the advantages of the present invention are: a) The light band of the multi-chip monochrome LED 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 has the characteristics of selectivity and uncertainty, and its light sensing band cannot be obtained by direct detection. b) Due to the quantum confinement effect, based on the characteristics of the continuously adjustable light spectrum of the narrow-band nanoluminescent material, it is easy to obtain multiple sets of continuously adjustable narrow-band spectra in the visible light range, which has a better expansion effect on encryption sensing in different scenarios.

[0029] (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 sensing, and lays the foundation for the application of large-area visible light sensing.

[0030] (8) The present invention provides lighting and sensing services for specific occasions, such as voice broadcasting, music playing, etc., and does not require high bandwidth of the light source. Therefore, switching between different spectrums does not require high modulation bandwidth of LED chips and light conversion materials. Micro-LED chips, Mini-LED chips, high-bandwidth nano-light conversion materials, etc. suitable for sensing can be selected from commercial materials to realize the functions of the present invention.

[0031] (9) The technical solution of the present invention fills the technical gap in the industry at home and abroad, and solves the technical problem that people have been eager to solve but have never succeeded in solving: Compared with other sensing technologies, visible light sensing is particularly suitable for short-distance spatial sensing between signal light sources and detectors. However, as an auxiliary means of other sensing technologies, visible light sensing still has implementation problems: the response time of the currently used lighting sources is too long, the modulation bandwidth is too low, and the luminous spectrum is different under different lighting conditions, 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, and its light source modulation bandwidth is improved compared to traditional lighting sources based on phosphors; 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 sensing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 A schematic flow chart of a highly confidential lighting sensor integration method is provided for an embodiment of the present application.

[0034] Figure 2 and Figure 3 A schematic diagram of functional modules in a highly confidential lighting sensor integrated system is provided for an embodiment of the present application.

[0035] Figure 4 A spectrum control flow chart for achieving a target luminescence spectrum is provided for an embodiment of the present application.

[0036] Figure 5 A calculated three-color white light spectrum distribution diagram with the same color but different spectra is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0037] 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.

[0038] like Figure 1 As shown, an embodiment of the present invention provides a high-confidentiality lighting sensor integration method, comprising the following steps:

[0039] Step S1, using the screen module to set the controller and input the luminous information of the white light spectrum of the correlated color temperature;

[0040] Step S2, the controller optimizes and calculates the target white light spectrum to obtain two or more groups of target luminous spectra with obvious spectral distinguishing characteristics under the conditions of the same luminous color and luminous brightness;

[0041] Step S3, after determining the target luminous spectrum, the controller continues to calculate and obtains control information of the blue LED chip current;

[0042] Step S4, the controller controls the current of the plurality of blue LEDs to drive the blue LEDs to emit light, and excites the narrow-band nanoluminescent material to emit a narrow-band spectrum of a specific wavelength, so that it can be better distinguished from other broadband spectra for lighting;

[0043] Step S5, the controller performs frequency control on the luminous spectrum on the basis of realizing the luminous spectrum, so as to realize the switching of two groups of luminous spectrum at a certain frequency; during the spectrum switching process, one or several monochromatic spectra in the multicolor spectrum change significantly, thereby realizing the modulation of the monochromatic spectrum. This embodiment controls the frequency of switching the luminous spectrum according to the application scenario, and controls the white light LED to transmit special spectral information in a special time period;

[0044] Step S6, introduce a filter at the detection end to filter out stray bands, and then use the detector to obtain the change characteristics of the target band light signal. This embodiment uses the detector to detect the spectrum, analyze the full spectrum information and the monochromatic spectrum information to obtain the spectral parameters such as the correlated color temperature and the color rendering index;

[0045] Step S7, decode the content of the data sent by the light source through the operator and transmit it to the screen module. This embodiment analyzes and uses the indication information carried by the spectrum to obtain changes in information such as spectrum shape and spectrum intensity to achieve visible light sensing.

[0046] The sensing parameter of this high-confidentiality lighting sensing integration method can be light intensity or spectrum. When visible light sensing uses the light intensity of a monochromatic light as a sensing parameter, the detector used can be a diode detector or a spectrometer with a spectrum recognition function. When visible light sensing uses the spectrum of a monochromatic light as a sensing parameter, the detector used is a spectrometer with a spectrum recognition function. Visible light sensing does not have high requirements for the spectrum switching frequency, and there is no electromagnetic radiation interference. It is difficult to determine the content of the sensing information using ordinary detection methods. It can achieve visible light communication and optical sensing with high confidentiality characteristics under the conditions that the human eye cannot perceive the change in luminous color and the detector cannot perceive the change in light intensity.

[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 sets 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 luminescence 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 confidentiality visible light sensing method proposed in the present invention.

[0048] 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.

[0049] 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 photodetectors 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 light sensor at the computing terminal.

[0050] Step S6 includes: Step S63, detecting the superimposed light of two monochromatic lights: before receiving the light 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 light sensor can be obtained at the computing terminal.

[0051] Under the condition that the target luminous spectrum has been obtained after spectrum optimization, the method of obtaining the target luminous spectrum in actual luminescence is relatively mature. For example, the method of generating a multicolor spectrum for the target luminous spectrum includes but is not limited to the following: 1) Exciting the corresponding multiple groups of luminescent materials through multiple groups of blue light LED chips, and exciting the corresponding luminescent materials to emit light by adjusting the driving current of the multiple groups of blue light LED chips respectively, generating different monochromatic spectra, and mixing the light to obtain the target luminescent spectrum; 2) Exciting a double-layer luminescent material with a gradient thickness through a single blue light LED chip, and obtaining two different target luminescent spectra through different emission angles and the regulation of the driving current of a single blue light LED chip; 3) Setting a blue light LED array to excite a double-layer or triple-layer luminescent material with a gradient thickness, and obtaining a variety of different target luminescent spectra by controlling the light emission of blue light LED chips at different positions and the driving current of different blue light LED chips.

[0052] Eliminate the impact of the error between the luminous spectrum and the target spectrum on the light sensor: Although there will be some errors between the target luminous spectrum and the actual luminous spectrum using the above method, the impact of the gap can be eliminated by increasing the threshold of the gap between the target luminous spectrum and the actual luminous spectrum in the operator. That is, although there are some errors between the target luminous spectrum and the actual luminous spectrum, the operator assumes that the actual luminous spectrum and the target luminous spectrum are consistent under the condition of the tiny error; only when the error threshold is exceeded, the operator considers that the actual luminous spectrum and the target luminous spectrum are different, thereby improving the ease of identifying the spectrum.

[0053] The technical problems overcome by this technical solution include the following aspects:

[0054] The present invention proposes to use narrow-band nano-luminescent materials to generate the luminescent band for sensing. Compared with LED luminescence or traditional light conversion material luminescence, it has the advantages of narrow band, continuously adjustable luminescent peak wavelength, high brightness, good confidentiality, etc. It can ensure that only extremely narrow filters can be used at the detection end to identify the light signal of the corresponding band, and has extremely high confidentiality and feasibility. If a non-extremely narrow filter is used at the detection end, the number of incoherent photons received by the photodetector will increase, causing inaccurate received signals, and thus making it impossible to determine the content of the transmitted information.

[0055] Although the present invention is similar to the method of visible light sensing of traditional LED lighting sources, it adopts the traditional method of light intensity control, which is independent of the spectral distribution of the emission. It only realizes the transmission of information by adjusting the intensity of small signals. The intensity of the sensing light intensity is much lower than the illumination light intensity, and the bit error rate is high. If the information is transmitted by adjusting the overall driving current intensity, on the one hand, it will cause the current to change too much across the threshold, and the LED light emission will be unstable. On the other hand, it will cause the lighting intensity to change to a degree that the user can perceive, which is not conducive to maintaining lighting comfort. The present invention can adjust the driving current intensity of the LED within a large range, and avoid the user to perceive the change of the lighting light, thus ensuring lighting comfort.

[0056] The present invention provides a basis for judging two groups of different spectra with the same color, the same brightness and different total luminous spectra in spectrum optimization, namely: the correlated color temperature is consistent, the total luminous flux of the spectral distribution is consistent, and the light intensity of the monochromatic spectrum converted by the narrow-band nanoluminescent material is obviously different from that of the other group of spectra, which can be distinguished by the photoelectric detector.

[0057] The present invention proposes a spectrum optimization algorithm, which calculates and selects white light spectra containing different monochromatic lights in the spectrum on the basis of unchanged luminous color, so that different spectra can recognize each other through filters. The present invention proposes a method of using two of the three-color spectrum to control the light band, and a method of using three of the four-color spectrum to control the light band, and proposes a variety of spectrum control methods, providing technical solutions for visible light sensing in different scenes and different modulation speeds.

[0058] The present invention proposes a technical solution to the spectrum recognition problem caused by the gap between the target luminous spectrum and the actual luminous spectrum. It is proposed to eliminate the influence of the spectrum gap by increasing the threshold of the gap between the target luminous spectrum and the actual luminous spectrum in the operator. That is, although there is some gap between the target luminous spectrum and the actual luminous spectrum, the operator assumes that the actual luminous spectrum and the target luminous spectrum are consistent under the condition that there is a small gap; after exceeding the set gap threshold, the operator considers that the actual luminous spectrum and the target luminous spectrum are different, thereby improving the ease of identifying the spectrum.

[0059] The present invention proposes to use a white light LED control method to achieve two or more different light emission spectra under the condition that a white light LED package structure remains unchanged, and to transmit digital signals. The present invention verifies and calculates the designed algorithm, proving that the above method can be used to control the light emission spectrum and obtain a light emission effect with different colors, the same light intensity, and two groups of light emission spectra that are significantly different.

[0060] In summary, the present invention solves the problem of visible light sensing implementation from multiple technical levels such as spectrum selection, spectrum synthesis, optical signal demodulation, and sensing error, and ensures the feasibility of the method.

[0061] Example of experimental preparation method for preparing light source using narrow-band nano-luminescent material:

[0062] 1) Use the yellow and red colors in the blue, yellow and red spectrum to control the light band:

[0063] Two identical blue LED chips are used to excite yellow and red narrow-band nano-luminescent 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 light and red narrow-band monochromatic spectra generated by the narrow-band nano-luminescent materials. By adjusting the driving current of the two blue LED chips, the luminous intensity of yellow light 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 SA (λ) and the target luminous spectrum SB (λ) with the same color and different spectrum. The luminous brightness of the target luminous spectrum is optimized to make the brightness of SA (λ) and SB (λ) consistent.

[0064] 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 SA(λ), and store the above driving current in array form as [I1] 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 another set of target luminous spectra SB(λ), and store the above driving current in array form as [I2] for subsequent reading. In the visible light sensing process, by alternately adjusting the driving current arrays of the two blue light LED chips to [I1] and [I2], the white light luminous spectrum switches back and forth between the two sets of target luminous spectra SA(λ) and SB(λ).

[0065] At the photoelectric detection end, the following methods can be used for detection as needed:

[0066] Method 1: Detect one of the 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 back the generated time-varying photocurrent to the operator. By switching between the two target luminescence spectra SA(λ) and SB(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 light sensor can be obtained at the computing terminal.

[0067] Method 2: Before receiving the optical 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 of the yellow light and red light bands for filtering. The bandpass filter 1 and the bandpass filter 2 respectively filter out the stray light bands 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 respectively. The photodetector 1 and the photodetector 2 feed back the generated photocurrent to the operator respectively. By switching between the two target luminescence spectra SA(λ) and SB(λ), the number of photons received by the two photodetectors changes periodically, and the two sets of change data of the photodetector 1 and the 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 the light sensor can be obtained at the computing terminal.

[0068] Mode 3: Before receiving the optical 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 of the yellow light and red light bands for filtering. The bandpass filter 1 and the bandpass filter 2 respectively filter out the stray light bands 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 respectively. The photodetector 1 and the photodetector 2 feed back the generated photocurrent to the operator respectively. Through the same frequency switching of the two target luminescence spectra SA (λ) and SB (λ), the number of photons received by the two photodetectors changes periodically, and the weighted emission signal changes of the photodetector 1 and the photodetector 2 are fed back through the superimposed photocurrent of the photodetector 1 and the 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 sensor can be obtained at the computing terminal. During the implementation of the above method, the transmitting end needs to add an additional process for processing spectrum optimization calculation to ensure that the received superposition signal can just reflect the change trend of the transmitted signal.

[0069] Spectral control flow chart for achieving target luminescence spectrum implementation example Figure 4 As shown. Figure 4 As shown, first, under the initialization conditions, according to the existing experimental conditions for preparing multi-color LEDs, the monochromatic spectral distribution S of different narrow-band nanoluminescent materials is input. 1 (λ), S 2 (λ), S 3 (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 value, which can be set according to environmental needs. Third, set the initial ratio parameter a of the monochromatic spectrum 1 ,a 2 ,a 3 ,…,a n , where a n With S n (λ) corresponds to. Then the total luminescence spectrum can be expressed as

[0070] S(λ)=a 1 S 1 (λ)+a 2 S 2 (λ)+a 3 S 3 (λ)+…+a n S n (λ)

[0071] Fourth, select the spectral object to be modulated, such as: 1 (λ) and S 2 (λ) is the monochromatic spectrum to be modulated, that is, in the modulation process, only a 1 and a 2 The other monochromatic spectrum ratio parameters remain unchanged. Fifth, the monochromatic spectrum ratio parameters are adjusted in steps, and the total spectrum S(λ) and its corresponding correlated color temperature after each adjustment are recorded. Sixth, the difference between the current correlated color temperature and the target correlated color temperature is compared. 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, it is continued to judge whether the traversal of the monochromatic spectrum ratio parameters is completed. If so, the program is terminated and the spectrum ratio parameters are output; if it is not yet completed, it is continued to return to the fifth step for calculation.

[0072] Figure 5 An 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 light 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 light 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.

[0073] like Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a highly confidential lighting sensor integrated system, including a controller, a transmitting end, a receiving end, a feedback end, a signal merging module, an operator and a screen module.

[0074] The controller is used to control the current of multiple blue light LEDs, drive the blue light LEDs to emit light, and stimulate the narrow-band nano-luminescent material to emit a narrow-band spectrum of a specific band, and mix several narrow-band spectra to form multiple groups of white light spectra with the same luminous color but different spectra; the white light spectrum contains multiple narrow-band monochromatic luminescent spectra with obvious peak characteristics, and carries a light sensing signal in one or more of the narrow-band spectra, which can better distinguish other broadband spectra for lighting; the transmitting end includes multiple blue light LED chip modules and multiple narrow-band nano-luminescent material modules, the multiple blue light LED chip modules are used to emit blue light, and the multiple narrow-band nano-luminescent material modules are used to realize light conversion and realize narrow-band monochromatic luminescent spectra of different light bands;

[0075] The receiving end includes multiple demodulation modules and multiple detector modules. The multiple demodulation modules are used to generate target luminescence spectra for communication and sensing, and the multiple detector modules are used for filtering and identifying light signals of different luminescence bands at the receiving end; the operator demodulates the signal according to the digital signal provided by the signal merging module, and obtains the corresponding original audio and text signals; the screen module is used to set luminescence parameters, obtain communication data and other results; the feedback end is used for the screen module to set the controller and input the relevant color temperature and other luminescence information of the white light spectrum.

[0076] The high-confidentiality lighting sensor integrated system also includes a dimming operation module, a blue light LED dimming module and a storage module; the dimming operation module is used to calculate dimming parameters such as the driving current of the blue light LED chip; the blue light LED dimming module is used to adjust the driving current and light-emitting frequency of different blue light LED chips; the storage module is used to store the actual light-emitting spectrum, the target light-emitting spectrum, and the value of the driving current of the blue light LED chip to facilitate subsequent reading; the signal merging module is used to summarize and analyze the signals of different light detection modules to obtain valid digital signal data, and the demodulation module is a filter.

[0077] The high-confidentiality lighting sensor integrated system of the present invention can monitor the spectrum ratio or the color rendering index during the alternation of isochromatic and heterochromatic light without being detected by the human eye, so as to judge the alternation information carried by the light sensor. The light sensing function can be used in the field of military sensing.

[0078] An embodiment of the present invention also 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 high-confidentiality visible light communication sensing integration method as in the above-mentioned embodiment is implemented.

[0079] An embodiment of the present invention further 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 highly confidential visible light communication sensing integration method as described in the above embodiment is implemented.

[0080] 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 highly confidential lighting sensor integration method, characterized in that: The following steps are involved: Step S1, using the screen module to set the controller and input the luminous information of the white light spectrum of the correlated color temperature; Step S2, the controller optimizes and calculates the target white light spectrum to obtain two or more groups of target luminous spectra with obvious spectral distinguishing characteristics under the conditions of the same luminous color and luminous brightness; Step S3, after determining the target luminous spectrum, the controller continues to calculate and obtains control information of the blue LED chip current; Step S4, the controller controls the current of the plurality of blue LED chips to drive the blue LED chips to emit light, and excites the narrow-band nano-luminescent material to emit a narrow-band spectrum of a specific wavelength, so that it can be better distinguished from other broadband spectra for lighting; Step S5, the controller performs frequency control on the luminous spectrum on the basis of realizing the luminous spectrum, so as to realize the switching of two groups of luminous spectrum at a certain frequency; during the spectrum switching process, one or several monochromatic spectra in the multicolor spectrum change significantly, thereby realizing the modulation of the monochromatic spectrum; Step S6, introducing a filter at the detection end to filter out stray bands, and then using a detector to obtain the change characteristics of the target band optical signal; Step S7, decoding the content of the data sent by optical communication through the operator, and transmitting it to the screen module; 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.

2. A highly confidential lighting sensor integration method 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.

3. A highly confidential lighting sensor integration method according to claim 2, 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.

4. A high-confidentiality lighting sensor integrated system, used to implement a high-confidentiality lighting sensor integrated method as claimed in any one of claims 1 to 3, characterized in that: It includes a controller, a transmitting end, a receiving end, a feedback end, a signal combining module, an operator and a screen module; The controller is used to control the current of multiple blue light LEDs, drive the blue light LEDs to emit light, and stimulate the narrow-band nano-luminescent material to emit a narrow-band spectrum of a specific band, and mix several narrow-band spectra to form multiple groups of white light spectra with the same luminous color but different spectra; the white light spectrum contains multiple narrow-band monochromatic luminescent spectra with obvious peak characteristics, and carries a light sensing signal in one or more of the narrow-band spectra, which can better distinguish other broadband spectra for lighting; the transmitting end includes multiple blue light LED chip modules and multiple narrow-band nano-luminescent material modules, the multiple blue light LED chip modules are used to emit blue light, and the multiple narrow-band nano-luminescent material modules are used to realize light conversion and realize narrow-band monochromatic luminescent spectra of different light bands; The receiving end includes multiple demodulation modules and multiple detector modules. The multiple demodulation modules are used to generate target luminescence spectra for communication and sensing, and the multiple detector modules are used for filtering and identifying light signals of different luminescence bands at the receiving end; the operator demodulates the signal according to the digital signal provided by the signal merging module, and obtains the corresponding original audio and text signals; the screen module is used to set luminescence parameters and obtain communication data results; The feedback end is used by the screen module to set the controller.

5. A highly confidential lighting sensor integrated system according to claim 4, characterized in that: It also includes a dimming operation module, a blue light LED dimming module and a storage module; the dimming operation module is used to calculate the dimming parameters of the blue light LED chip driving current; the blue light LED dimming module is used to adjust the driving current and light-emitting frequency of different blue light LED chips; the storage module is used to store the actual light-emitting spectrum, the target light-emitting spectrum, and the numerical value of the blue light LED chip driving current for subsequent reading; the signal merging module is used to summarize and analyze the signals of different light detection modules to obtain valid digital signal data, and the demodulation module is a filter.

6. 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 highly confidential lighting sensor integration method as described in any one of claims 1 to 3 is implemented.

7. 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 highly confidential lighting sensor integration method as described in any one of claims 1 to 3 is implemented.

Images