CN110334089A - Logical shine of class spectrum of sunlight shares LED module matching process - Google Patents

Logical shine of class spectrum of sunlight shares LED module matching process Download PDF

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Publication number
CN110334089A
CN110334089A CN201910286306.0A CN201910286306A CN110334089A CN 110334089 A CN110334089 A CN 110334089A CN 201910286306 A CN201910286306 A CN 201910286306A CN 110334089 A CN110334089 A CN 110334089A
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led
spectrum
sunlight
lamp bead
light
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刘立林
赖远佳
操琴
张紫莹
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Sun Yat Sen University
National Sun Yat Sen University
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National Sun Yat Sen University
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/22Indexing; Data structures therefor; Storage structures
    • G06F16/2291User-Defined Types; Storage management thereof
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24Querying
    • G06F16/245Query processing
    • G06F16/2457Query processing with adaptation to user needs
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24Querying
    • G06F16/245Query processing
    • G06F16/2458Special types of queries, e.g. statistical queries, fuzzy queries or distributed queries
    • G06F16/2462Approximate or statistical queries
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10Complex mathematical operations
    • G06F17/18Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/20Design optimisation, verification or simulation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114Indoor or close-range type systems
    • H04B10/116Visible light communication

Abstract

The present invention relates to semiconductor lightings and visible light communication field, disclose the LED illumination communication integration module matching process of a type spectrum of sunlight, specifically include: the approximating method of class spectrum of sunlight, chromaticity index matching, communication link design.This module is mainly used for choosing the strong lamp bead of communication performance as communication channel on the basis of being fitted spectrum of sunlight and matching lighting criteria, other lamp beads assist to realize lighting criteria as secondary light source, to reach logical according to shared ideal conditions.Using the technology of the present invention, the class spectrum of sunlight of available high fitting precision determines light distribution scheme based on this, saves manpower and time, and perfection realizes that logical shine shares.

Description

Logical shine of class spectrum of sunlight shares LED module matching process
Technical field
The present invention relates to semiconductor lightings and visible light communication field, more particularly, to the logical photograph of a type spectrum of sunlight Share LED module matching process.
Background technique
Light emitting diode (Light-emitting diode, abbreviation LED), is a kind of semiconducting solid luminescent device, is Using solid semiconductor chip as luminescent material, the compound energy for releasing surplus is occurred by carrier in the semiconductors and is drawn Photon transmitting is played, red, yellow, blue, green, green, orange, purple, white light is directly issued.Semiconductor lighting product is exactly that LED is utilized to make The luminaire manufactured for light source.Semiconductor lighting has the distinguishing features such as efficient, energy-saving and environmental protection, easy to maintain, is to realize The effective way of energy-saving and emission-reduction has been increasingly becoming the leather of the another field lighting source after illumination Shi Shangji incandescent lamp, fluorescent lamp Life.Under the worry background raised once again of Present Global energy shortage, energy saving is the important problem that we will face in future, In lighting area, the application of LED luminous product just attracts the sight of common people, green light source product LED novel as one kind, The necessarily trend of future development, 21st century will enter using LED as the novel illumination light source epoch of representative.The energy saving energy without Pollution is environmental protection.DC driven, the conversion of super low-power consumption (0.03-0.06 watts of single tube) electric light power is close to 100%, equal illumination Effect is than 80% or more conventional light source energy conservation.LED light source has person, and it is long-life lamp, means the lamp never extinguished.Solid cold light Source, epoxy resin encapsulation, the part also not loosened in lamp body, easily burnt there is no filament light-emitting, heat deposition, light decay the disadvantages of, Service life was up to 6 ten thousand to 10 ten thousand hours, 10 times longer than the conventional light source service life or more.With the illumination effect phase of conventional light source dullness It than, LED light source is low pressure microelectronic product, it is successful fusion computer technology, network communication technology, image processing techniques, embedding Enter formula control technology etc., be semiconductor photoelectric device " high-new point " technology so being also digital information product, there is online compile Journey, infinite update, flexible and changeable feature.
Visible light communication (Visible Light Communication, VLC) is invisible to the naked eye using what LED was issued High speed light and shade flash signal transmit information.The concept of visible light communication obtains rapidly the world after 2000 propose The concern and support of various countries, are grown rapidly between the short more than ten years.Optic communication can be chosen as 2011 by Time One of year global 50 big scientific and technological inventions.International multiple research tissues position visual imaging array diversity, multiplexing, transmission, communication Equal basic principles and technology conduct a research, it is seen that the light imaging communication research field new as one is being risen.It is so-called can The light-exposed communication technology refers to, the light on and off of LED light are controlled by the high frequency of eye recognition not, bright to represent 1, goes out and represents 0, receives End receives optical signal by sensor, and energy transmitting binary signal can so transmit various information.Due to people The high frequency of outlook not carrys out the brightness of modulation light, so the integration of illumination, communication, display may be implemented.Wireless frequency spectrum money Source is nervous, and many frequency ranges are all occupied.The wavelength of visible light wave range is between 780nm-375nm.Visible light wave range is still Belong to blank frequency spectrum, can be used without authorization, therefore VLC technology seizes blank frequency spectrum, effectively utilizes frequency spectrum resource, expands The spectrum technology of next-generation broadband connections.The spectral bandwidth of visible light is more than 10000 times of current electromagnetic wave bandwidth.
Summary of the invention
The present invention in order to overcome at least one of the drawbacks of the prior art described above, provides the logical according to shared of a type spectrum of sunlight LED module matching process, the class spectrum of sunlight of available high fitting precision.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: logical shine of a type spectrum of sunlight shares LED mould Block matching method, comprising the following steps:
S1. the curve of spectrum database for constructing monochromatic LED chip or lamp bead, is pretended with peak wavelength, halfwidth, peak light It is characterized parameter, and selects spectrum of sunlight as target optical spectrum;
S2. spectral mixing library is calculated: the absolute radiation power that monochromatic LED is obtained by correcting Gaussian function is distributed song Line, the formula for correcting Gaussian function are as follows:
The absolute radiation power distribution curve matrix of every monochromatic LED in database is added, spectral mixing library is obtained φLED, its calculation formula is:
S3. realize to obtain initial coefficients K, the calculating of least square method by Least Square in Processing LED light modal data library Formula are as follows:
Wherein, φLEDFor fit-spectra, pass through the absolute radiation power distribution curve to every monochromatic LED in database Matrix addition obtains, and formula is as follows:
S4. determined by setting correlation coefficient threshold, then carry out multiple Monte Carlo iteration, and compensate related coefficient;
S5. spectroscopic data is imported into optical analysis software CT&A and calculates its colorimetric parameter, and acquired results are used to Light efficiency threshold value, reference color temperature and degree of fitting are set, filters out a kind of fit-spectra and LED lamp bead mix proportion scheme for LED module;
If S6. colorimetric parameter is below standard, related coefficient reenters iteration, and updates correlation coefficient threshold judgement;
If S7. colorimetric parameter is up to standard, communication performance measurement, qualified lamp bead are carried out to lamp bead corresponding to related coefficient As the alternative of communication link, remaining is floor light.
It in the present invention, mainly include approximating method, the chromaticity index matching, communication link design of class spectrum of sunlight.Mainly For on the basis of being fitted spectrum of sunlight and matching lighting criteria, choosing the strong lamp bead of communication performance as communication channel, other Lamp bead assists to realize lighting criteria as secondary light source, to reach logical according to shared ideal conditions.It, can using the technology of the present invention To obtain the class spectrum of sunlight of high fitting precision, light distribution scheme being determined based on this, is saved manpower and time, logical shine is realized in perfection It shares.
Further, by fitting precision R in the S5 step2Judge fitting degree, judges whether to need to modify threshold Value, fitting precision R2Calculation formula are as follows:
If fitting precision R2Less than threshold value, then two groups of data progress matrixes is subtracted each other and comes evaluated error and compensation error, Compensation error is realized by compensating coefficient, and evaluated error, the calculation formula of evaluated error E are realized by judgement factor are as follows:
E=φs(λ)-S(λ)。
Further, the S7 step specifically includes:
S71. based on -3dB and -6dB bandwidth test as a result, according in amount of bandwidth descending arrangement LED lamp bead mix proportion scheme LED lamp bead individual;
S72. preferentially the high 1-5 kind LED lamp bead building visible light communication link of selection bandwidth, principle are, selected lamp bead Peak wavelength interval is greater than halfwidth;
S73. remaining LED lamp bead in mix proportion scheme be used for floor light, with reach the world, the country needed for general illumination, The standard requirements of industry.
Preferably, the curve of spectrum database of LED chip or lamp bead is put in storage with the spectrum for being commercialized LED.
Preferably, logical according to sharing in LED module, the LED for communication is list of the spectrum halfwidth less than 40 nanometers Color LED, for example, such as purple LED (peak wavelength 415nm, halfwidth 22nm, peak strength 1.27W*m-2*nm-1), it is blue Light LED (peak wavelength 445nm, halfwidth 23nm, peak strength 0.72W*m-2*nm-1), green green light LED (peak value wave A length of 495nm, halfwidth 28nm, peak strength 0.38W*m-2*nm-1), (peak wavelength 525nm, half high for green light LED Width is 31nm, peak strength 0.39W*m-2*nm-1), (peak wavelength 625nm, halfwidth 22nm, peak value are strong for red-light LED Degree is 0.55W*m-2*nm-1) etc.;Illuminating secondary light source selects spectrum halfwidth monochromatic or glimmering light activated greater than 40 nanometers LED, for example, orange LED lamp bead (peak wavelength 588nm, halfwidth 48nm, peak strength 0.4W*m-2*nm-1)。
Preferably, LED light modal data library is the related coefficient and itself library of spectra number by each grey iterative generation of algorithm It is obtained according to multiplication, which follows iteration to automatically update;Spectral mixing library is initial LED light modal data library;Target light Spectrum can select different spectrum as needed.
Preferably, colorimetric parameter standard is colour rendering index Ra > 80, light efficiency η > 1001m/W, colour temperature reaches 6500K.
In the present invention, least square method collocation Monte Carlo iteration in use, determine the peak wavelength of LED, half first High wide and peak strength;Then algorithm fitting precision, such as 0.9 are set, determine the LED mix proportion scheme series met the requirements, according to Required LED kind quantity arranges from less to more, and preferred kind is least;And using the mixed spectra under LED proportion as class daylight Spectrum;Selection communication lamp bead and floor light lamp bead from the LED of selection proportion.
Chromaticity index test software CT&A accesses CT&A software serial ports, the LED that spectrum simulation method is obtained by matlab Module data is automatically imported.Final CT&A software as a result, determine communication light source and secondary light source, realize chromaticity index requirement.
Communication light source is used as communication link, and secondary light source assists to realize lighting criteria.Four kinds of lamp beads used in communication link are Confirmable lamp bead on the market, wherein two lamp bead is confirmable lamp bead on the market to secondary light source.
Compared with prior art, beneficial effect is:
1. largely reducing the difficulty and workload of artificial light distribution by the way of simulation;
2. pair spectrum simulation, colorimetric parameter and photometric parameter have carried out comprehensive analysis, mentioned for the communication characterization of hereafter device Essential condition is supplied;
3. shining sharing system integrated design module to be logical, the light source between multi-channel communication systems can be influenced to visit Study carefully.
Detailed description of the invention
Fig. 1 is the logical according to the logic diagram for sharing LED module matching process of the method for the present invention class spectrum of sunlight.
Fig. 2 is the pictorial diagram of communication light source and secondary light source in LED combination in the embodiment of the present invention.
Fig. 3 is that LED light modal data library imports and radiation patterns code in the embodiment of the present invention.
Fig. 4 is that least square method solves initial coefficients partial code in the embodiment of the present invention.
Fig. 5 be in the embodiment of the present invention software CT&A feedback data with new related coefficient threshold portion code.
Fig. 6 is the fitted figure based on spectrum of sunlight approximating method in the embodiment of the present invention.
Fig. 7 is the LED kind that fit-spectra chooses in the embodiment of the present invention.
Fig. 8 is the colorimetric parameter that LED combination calculates in the embodiment of the present invention.
Fig. 9 is communication light source-three dB bandwidth in LED combination in the embodiment of the present invention.
Specific embodiment
Attached drawing only for illustration, is not considered as limiting the invention;In order to better illustrate this embodiment, attached Scheme certain components to have omission, zoom in or out, does not represent the size of actual product;To those skilled in the art, The omitting of some known structures and their instructions in the attached drawings are understandable.Being given for example only property of positional relationship is described in attached drawing Illustrate, is not considered as limiting the invention.
As shown in Figure 1, logical shine of type spectrum of sunlight provided by the invention shares LED module matching process, including following Step:
Step 1. constructs the curve of spectrum database of monochromatic LED chip or lamp bead, with peak wavelength, halfwidth, peak light It pretends and is characterized parameter, and select spectrum of sunlight as target optical spectrum.
Spectral mixing library is calculated in step 2.: obtaining the absolute radiation power point of monochromatic LED by correcting Gaussian function Cloth curve, the formula for correcting Gaussian function are as follows:
The absolute radiation power distribution curve matrix of every monochromatic LED in database is added, spectral mixing library is obtained φLED, its calculation formula is:
Step 3. as shown in Figure 3,4, realizes to obtain initial coefficients K by Least Square in Processing LED light modal data library, most The calculation formula of small square law are as follows:
Wherein, φLEDFor fit-spectra, pass through the absolute radiation power distribution curve to every monochromatic LED in database Matrix addition obtains, and formula is as follows:
Then step 4. carries out multiple Monte Carlo iteration as shown in Fig. 2, by setting correlation coefficient threshold judgement, and Compensate related coefficient.
Step 5. calculates its colorimetric parameter as shown in figure 5, spectroscopic data is imported into optical analysis software CT&A, and will Acquired results are used to set light efficiency threshold value, reference color temperature and degree of fitting, filter out a kind of fit-spectra and LED lamp bead mix proportion scheme For LED module;
Wherein, by fitting precision R2Judge fitting degree, judges whether to need to modify threshold value, fitting precision R2Calculating Formula are as follows:
If fitting precision R2Less than threshold value, then two groups of data progress matrixes is subtracted each other and comes evaluated error and compensation error, Compensation error is realized by compensating coefficient, and evaluated error, the calculation formula of evaluated error E are realized by judgement factor are as follows:
E=φS(λ)-S(λ)。
For step 6. as shown in Fig. 2, if colorimetric parameter is below standard, related coefficient reenters iteration, and updates related coefficient Threshold determination;
Step 7. carries out communication performance survey to lamp bead corresponding to related coefficient as shown in Fig. 2, if colorimetric parameter is up to standard Fixed, for qualified lamp bead as the alternative of communication link, remaining is floor light.
S71. based on -3dB and -6dB bandwidth test as a result, according in amount of bandwidth descending arrangement LED lamp bead mix proportion scheme LED lamp bead individual;
S72. preferentially the high 1-5 kind LED lamp bead building visible light communication link of selection bandwidth, principle are, selected lamp bead Peak wavelength interval is greater than halfwidth;
S73. remaining LED lamp bead in mix proportion scheme be used for floor light, with reach the world, the country needed for general illumination, The standard requirements of industry, such as colour rendering index, colour temperature, light efficiency index.
As shown in Fig. 2, logical according to sharing in LED module, the preferred spectrum halfwidth of LED for communication is relatively narrow (to be received less than 40 Rice) monochromatic LED, such as purple LED (peak wavelength 415nm, halfwidth 22nm, peak strength 1.27W*m-2*nm-1)、 Blue-ray LED (peak wavelength 445nm, halfwidth 23nm, peak strength 0.72W*m-2*nm-1), green green light LED (peak value Wavelength is 495nm, halfwidth 28nm, peak strength 0.38W*m-2*nm-1), green light LED (peak wavelength 525nm, half Gao Kuanwei 31nm, peak strength 0.39W*m-2*nm-1), red-light LED (peak wavelength 625nm, halfwidth 22nm, peak value Intensity is 0.55W*m-2*nm-1) etc.;Illuminate the monochrome or fluorescence of the preferred spectrum halfwidth of secondary light source larger (being greater than 40 nanometers) The LED of excitation, such as orange LED lamp bead (peak wavelength 588nm, halfwidth 48nm, peak strength 0.4W*m-2*nm-1)。
Wherein, Fig. 6 is the fitted figure based on spectrum of sunlight approximating method, and the mixed light spectrogram of 21 kinds of LED is calculated by algorithm Come.The mixed spectra of 21 kinds of LED is class spectrum of sunlight;
Fig. 7 is 21 kinds of LED that least square method combination Monte Carlo iterates to calculate out, and wherein communication light source is determined as 4 Kind, secondary light source is remaining 17 kinds;
Fig. 8 is the colorimetric parameter that LED combination calculates, CT&A obtain 4 kinds of communication light sources plus 2 kinds of secondary light sources, it can be achieved that The colorimetric parameter needed;
Fig. 9 be LED combination in communication light source-three dB bandwidth characterization, using visible light communication platform to the tune of communication light source Bandwidth processed is tested.
In the specific implementation process, it can modify according to the actual situation to the fitting precision of the program.The present embodiment In, the fitting precision that least square method collocation Monte Carlo iteration uses is 0.9.Final confirmable LED kind is 21.From 21 Selection communication lamp bead and floor light lamp bead in kind LED.LED kind quantity can be reduced by turning down fitting precision.
In the specific implementation process, according to the actual situation chromaticity index can be required to modify.In the present embodiment, color Degree parameter and standard is colour rendering index Ra > 80, light efficiency η > 100lm/W, and (white light) colour temperature reaches 6500K.
In the specific implementation process, can the combination according to the actual situation to communication light source and secondary light source modify. In the present embodiment, 4 kinds of communication light sources add 2 kinds of secondary light sources, it can be achieved that the colorimetric parameter needed.It can be according to colorimetric parameter from surplus Under 15 kinds of lamp beads in select to be added in secondary light source.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention Protection scope within.

Claims (7)

1. a type spectrum of sunlight is logical according to shared LED module matching process, which comprises the following steps:
S1. the curve of spectrum database for constructing monochromatic LED chip or lamp bead, using peak wavelength, halfwidth, peak light intensity as special Parameter is levied, and selects spectrum of sunlight as target optical spectrum;
S2. spectral mixing library is calculated: obtaining the absolute radiation power distribution curve of monochromatic LED by correcting Gaussian function, The formula for correcting Gaussian function is as follows:
The absolute radiation power distribution curve matrix of every monochromatic LED in database is added, spectral mixing library φ is obtainedLED, Its calculation formula is:
S3. realize to obtain initial coefficients K, the calculation formula of least square method by Least Square in Processing LED light modal data library Are as follows:
Wherein, φLEDFor fit-spectra, pass through the absolute radiation power distribution curve matrix to every monochromatic LED in database It is added and obtains, formula is as follows:
S4. determined by setting correlation coefficient threshold, then carry out multiple Monte Carlo iteration, and compensate related coefficient;
S5. spectroscopic data is imported into optical analysis software CT&A and calculates its colorimetric parameter, and acquired results are used to set Light efficiency threshold value, reference color temperature and degree of fitting filter out a kind of fit-spectra and LED lamp bead mix proportion scheme for LED module;
If S6. colorimetric parameter is below standard, related coefficient reenters iteration, and updates correlation coefficient threshold judgement;
If S7. colorimetric parameter is up to standard, communication performance measurement, qualified lamp bead conduct are carried out to lamp bead corresponding to related coefficient Communication link it is alternative, remaining is floor light.
2. class spectrum of sunlight according to claim 1 is logical according to shared LED module matching process, which is characterized in that described By fitting precision R in S5 step2Judge fitting degree, judges whether to need to modify threshold value, fitting precision R2Calculation formula Are as follows:
If fitting precision R2Less than threshold value, then matrixes are carried out to two groups of data and subtract each other to come evaluated error and compensation error, pass through and be Compensation error is realized in number compensation, realizes evaluated error, the calculation formula of evaluated error E by judgement factor are as follows:
E=φS(λ)-S(λ)。
3. class spectrum of sunlight according to claim 2 is logical according to shared LED module matching process, which is characterized in that described S7 step specifically includes:
S71. based on -3dB and -6dB bandwidth test as a result, according to the LED in amount of bandwidth descending arrangement LED lamp bead mix proportion scheme Lamp bead individual;
S72. preferentially the high 1-5 kind LED lamp bead of selection bandwidth constructs visible light communication link, and principle is the peak value of selected lamp bead Wavelength interval is greater than halfwidth;
S73. remaining LED lamp bead in mix proportion scheme is used for floor light, to reach the world, the country needed for general illumination, industry Standard requirements.
4. class spectrum of sunlight according to claim 3 is logical according to shared LED module matching process, which is characterized in that LED chip Or the curve of spectrum database of lamp bead is put in storage with the spectrum for being commercialized LED.
5. class spectrum of sunlight according to claim 3 is logical according to shared LED module matching process, which is characterized in that logical according to altogether With in LED module, the LED for communication is monochromatic LED of the spectrum halfwidth less than 40 nanometers;It illuminates secondary light source and selects spectrum Halfwidth is greater than 40 nanometers of monochromatic or glimmering light activated LED.
6. class spectrum of sunlight according to claim 3 is logical according to shared LED module matching process, which is characterized in that LED light spectrum Database is to be multiplied by the related coefficient of each grey iterative generation of algorithm with itself library of spectra data, which follows repeatedly In generation, automatically updates;Spectral mixing library is initial LED light modal data library;Target optical spectrum can select different spectrum as needed.
7. feature exists according to the logical according to LED module matching process is shared of the described in any item class spectrum of sunlight of claim 3 to 6 It is colour rendering index Ra > 80 in, colorimetric parameter standard, light efficiency η > 100lm/W, colour temperature reaches 6500K.
CN201910286306.0A 2019-04-10 2019-04-10 Logical shine of class spectrum of sunlight shares LED module matching process Pending CN110334089A (en)

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CN114647083A (en) * 2020-12-17 2022-06-21 华为技术有限公司 Display module, head-mounted display equipment, and method and device for controlling emission spectrum
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Application publication date: 20191015