CN109027720A - A kind of optimization method of LED light source - Google Patents
A kind of optimization method of LED light source Download PDFInfo
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- CN109027720A CN109027720A CN201810681646.9A CN201810681646A CN109027720A CN 109027720 A CN109027720 A CN 109027720A CN 201810681646 A CN201810681646 A CN 201810681646A CN 109027720 A CN109027720 A CN 109027720A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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Abstract
The present invention is suitable for lighting technical field, provides a kind of optimization method of LED light source, comprising: the first illuminator is chosen, for issuing white light；Optimization white light is the first near-nature forest light；Wave band to be optimized is determined according to the spectrum of the first near-nature forest light and natural light spectrum；According to the second illuminator of waveband selection to be optimized；The first illuminator and the second illuminator are lighted according to default light flux ratio；By adjusting the spatial distribution optimum organization spectrum of the first illuminator and/or the second illuminator, quasi- natural light is obtained.The relative spectral power for each wave band of quasi- natural light that this method obtains is conducive to protect eyesight, reduces the Vision Health problem for the crowd under high blue illumination environment that is chronically at close to natural light；Higher color temperature is able to maintain while realizing low blue light, high-resolution, the visual effect of high identification and the good state of mind are able to maintain while promoting the general level of the health, and it is able to ascend the relative spectral power of feux rouges, and then promote the Health Category of quasi- natural lighting.
Description
Technical field
The present invention relates to LED technology field, in particular to a kind of optimization method of LED light source.
Background technique
Light is the source of all things on earth, is one of necessary condition of human survival, the function influence of light biology growth and species
Evolution, learned during human evolution first using natural light, the light of the Nature stays in human evolution's course
Deep branding has been descended, such as: sunrise sunset forms optical bio clock；Morning and evening photochromic variation round the clock and illumination cause the mankind
Effect of mentality and physiology etc..
The appearance of artificial light solves the lighting problem of night or dark surrounds, but also significantly changes people
The circadian rhythm formed for a long time to natural light, the harm that the illumination of common artificial light is brought is to cannot be neglected.
This harm is mainly derived from spectrum imperfection and higher blue light ingredient and wave of the artificial light for natural light
Long shorter purple light and ultraviolet light ingredient, in addition, the optics yield (such as colour temperature, chromaticity coordinates etc.) of artificial light sources and natural light
Difference is larger, also influences the sensory experience of people, makes one to generate unnatural uncomfortable sense.
The visible light that human eye is seen is a part of entire electromagnetic spectrum, it is seen that the range of spectrum is probably 390-
760nm.In the light of the wave band, ultraviolet light, purple light and blue light are the most serious to the injury of human eye.Injury of the purple light to eyes
In the first half (such as blepharocarcinoma, cataract, pinguecula, superfluous piece of different shape etc.) of eyeball.Blue light is in eyeball to the injury of eyes
It is latter half of, it will lead to macular disease.Because blue light can accelerate the photosensory cell and retinal pigment of the macular area in retina
The oxidative pressure of epithelial cell and cause to damage, and both cells are all non-renewable, once just will affect view after damage
Power and irreversible, it is serious to even result in blindness.In the cell of human retina, the cell for perceiving blue accounts for smaller, blue light
Eyes will be entered by scattering more than certain limit, when scattering phenomenon occurs, light can be spread, and the quality and color of object can be turned round
It is bent.Injury of the blue light to eyes, it is especially obvious to the inpairment of vision of minority student and children, it will lead to children's color
It is weak, the chromatic discrimination power of children is reduced, and lead to the soaring of minor's rate of myopia.
We are while paying close attention to the objective visual effect of light, it is also contemplated that impression of the people to light, as light to the health of people,
Mood, comfort and the influence to physiological change.For example, the lamps and lanterns of office space are usually high color temperature light source, it can with promotion
The job morale of diopter and staff.Wherein contain higher blue light ingredient, work office worker is chronically at artificial light sources
In lighting environment, or watch computer, mobile phone attentively for a long time, it may appear that feel dizzy, ophthalmodynia, headache, it is listless phenomena such as, serious shadow
People's health is rung, there are also the skin of groups of people is more sensitive to purple light and ultraviolet light, long focus computer will lead to various skins
Problem.And under natural light environment, then it may feel that comfortable and light.
With the development of lighting engineering, people require constantly to be promoted to overall performances such as quality, the comfort levels of light, various new
The light source and technology of type continue to bring out, and such as simulate the LED light source of natural light spectrum, dynamic and intelligent lighting engineering etc..Undoubtedly
, optimal illumination light is natural light, and natural lighting is always the vision of illuminating industry.
White-light illuminating product in existing LED technology, spectrum and natural light difference it is still larger, and blue light ratio compared with
It is high.Such as Figure 10, which illustrate a kind of spectrum of white light source using blue chip combination fluorescent powder, due to the wave-length coverage of chip
It is had certain limitations with the wave-length coverage of luminous intensity and fluorescent powder, so that the spectrum difference of this composite structure and natural light is still
So larger, especially blue light ratio is excessively high.
Such as Figure 11, the spectrum of the white light source for chip (or sub-light source) combination which illustrate a kind of using multi-wavelength, example
Such as the three primary colors composite structure of red light chips, green light chip and blue chip, pass through wavelength complementation covering visible light as far as possible
Wave band, but there are the obvious spikes of three central wavelengths of red, green, blue for this white light, and other wavelength are relatively low, with from
Right spectrum differs greatly；And structure is difficult to uniform mixed light, and size is larger；And the drive of multiple chips (or sub-light source)
Flowing mode is complicated, needs a control chip, circuit is complicated, poor for applicability using inconvenience.
As it can be seen that light source in the prior art exists and natural light differs biggish defect.And rapid technological growth's
Today provides the quasi- natural lighting of health, changes there are the ratio of the children of visual impairment and sub-health population are increasing
Kind children's vision ensures that health of people has become urgent social demand.
Summary of the invention
The purpose of the present invention is to provide a kind of optimization methods of LED light source, it is intended to obtain quasi- natural light by this method
Light source, solve Conventional LED light sources and differ larger technical problem with natural light, promote national health level.
The invention is realized in this way a kind of optimization method of LED light source, includes the following steps:
The first illuminator is chosen, first illuminator is for issuing white light；
The white light is optimized for the first near-nature forest light by the spatial distribution for optimizing first illuminator；
According to the spatial distribution of the first near-nature forest light and the spatial distribution of natural light, first near-nature forest is determined
The wave band to be optimized of light；
According to second illuminator of waveband selection to be optimized；
The first illuminator and the second illuminator are lighted according to the light flux ratio of preset first illuminator and the second illuminator；
By adjusting the spatial distribution of first illuminator and/or the second illuminator, optimize first illuminator and
The combination spectrum of second illuminator obtains quasi- natural light.
The LED light source optimization method issues the first near-nature forest light by the first illuminator, then by increasing by the second illuminator
The part that spectrum in the first near-nature forest light lacks is compensated, by the relative spectral power and optical parameter that set each wave band of spectrum
Zone of reasonableness makes the shape of combination spectrum by adjusting the spatial distribution of the first illuminator and the second illuminator in optimization process
Shape and corresponding optical parameter meet pre-provisioning request, obtain quasi- natural light.It being capable of more adjunction by the quasi- natural light that this method obtains
The feature of near-nature forest light solves that conventional light source spectrum is imperfect and subband missing and optical parameter is not up to standard asks
Topic is conducive to protect eyesight, protects health, be the technological break-through that technical field of LED illumination is of great significance.
In one embodiment, first illuminator includes blue chip and the optical transition for covering the blue chip
Film, the optical transition material that the optical transition film includes colloid and is uniformly mixed in the colloid；
The white light, is optimized for the step packet of the first near-nature forest light by the spatial distribution of optimization first illuminator
It includes:
The formula and/or concentration and/or thickness of the optical transition film are adjusted, in the white light for issuing the first illuminator
The relative spectral power that the relative spectral power of 480-500nm wave band is greater than 0.30,500-640nm wave band is greater than 0.60.
In one embodiment, in the spatial distribution of the optimization first illuminator, the white light is optimized for the
In the step of one near-nature forest light, when the colour temperature of the first near-nature forest light is 2700K-3000K, 480-500nm wave band it is opposite
Spectral power is greater than 0.30；The relative spectral power of 500-640nm wave band is greater than 0.70；
When the colour temperature of the first near-nature forest light is 4000K-4200K, the relative spectral power of 480-500nm wave band is greater than
0.45；The relative spectral power of 500-640nm wave band is greater than 0.65；
When the colour temperature of the first near-nature forest light is 5500K-6000K, the relative spectral power of 480-500nm wave band is greater than
0.4；The relative spectral power of 500-640nm wave band is greater than 0.60.
In one embodiment, the optical transition film is fluorescent film or phosphor film, and the optical transition material is fluorescence
Powder or phosphor powder；The fluorescent powder for emitting the first near-nature forest light includes: rouge and powder, green powder and yellowish green powder；
The chromaticity coordinates of the rouge and powder is X:0.660~0.716, Y:0.340~0.286；
The chromaticity coordinates of the green powder is X:0.064~0.081, Y:0.488~0.507；
The chromaticity coordinates of the yellowish green powder is X:0.367~0.424, Y:0.571~0.545；
The weight ratio of the rouge and powder, green powder and yellowish green powder are as follows:
Rouge and powder: green powder: yellowish green powder=(0.010~0.035): (0.018~0.068): (0.071~0.253)；
The concentration of the fluorescent film is 17%~43%.
In one embodiment, the fluorescent film with a thickness of 0.2-0.4mm；The grain of the rouge and powder, green powder and yellowish green powder
Diameter is less than 15 μm.
In one embodiment, the wave band to be optimized is 640-700nm；Second illuminator is for issuing 640-
The feux rouges of 700nm.
In one embodiment, the spatial distribution by adjusting first illuminator and the second illuminator, it is excellent
The combination spectrum for changing first illuminator and the second illuminator, the step of obtaining quasi- natural light include:
S1: adjusting the driving current of first illuminator and the second illuminator, and monitor the combination spectrum in real time, when
When each wave band relative spectral power of the combination spectrum reaches preset range, step S2 is carried out, step is otherwise repeated
S1；
S2: detecting the optical parameter of the combination spectrum, when the optical parameter reaches preset range, carries out step
Otherwise S3 comes back for step S1；
S3: record the luminous flux of first illuminator and the light radiation of the second illuminator actual ratio, described
The practical driving current and corresponding optical parameter of one illuminator and the second illuminator.
In one embodiment, when the step S1 number of repetition reaches pre-determined number, step S4 is carried out: described in adjustment
The formula and/or concentration and/or thickness of optical transition film, then come back for step S1；
Alternatively, carrying out step S5: the central wavelength of adjustment second illuminator increases central wavelength and is different from the
The third illuminator of two illuminators, then comes back for step S1.
In one embodiment, in the step S4, each wave band is adjusted by adjusting the formula of the optical transition film
Relative spectral power and/or colour rendering index；
Colour rendering index and/or colour temperature are adjusted by adjusting the concentration of the optical transition film；
Colour temperature is adjusted by adjusting the thickness of the optical transition film.
In one embodiment, the optical parameter includes at least colour temperature, chromaticity coordinates, color tolerance, colour rendering index Ra, colour developing
Index R9, colour rendering index R12 and blue light color ratio；The preset range of the color tolerance is less than 5, and the colour rendering index Ra's is pre-
Determine range be greater than 90, the preset range of the colour rendering index R9 be greater than 90, the preset range of colour rendering index R12 be greater than
80, the preset range of the blue light color ratio is less than 5.7%.
Detailed description of the invention
Fig. 1 is the optimization method flow chart of LED light source provided in an embodiment of the present invention；
Fig. 2 is the spectral schematic of the first illuminator provided in an embodiment of the present invention；
Fig. 3 is natural light spectral schematic；
Fig. 4 is the flow chart of the step S106 of the optimization method of LED light source provided in an embodiment of the present invention；
Fig. 5 is a kind of spectral schematic of quasi- natural light provided in an embodiment of the present invention；
Fig. 6 is the spectrum comparison diagram of quasi- natural light and natural light provided in an embodiment of the present invention；
Fig. 7 is the spectrum test report figure of quasi- natural light shown in Fig. 5；
White-light spectrum schematic diagram when Fig. 8 is the blue chip provided in an embodiment of the present invention using 452.5-455nm；
Fig. 9 is the structural schematic diagram of quasi- natural light LED light source provided in an embodiment of the present invention；
Figure 10 is the first spectrogram of white light source in the prior art；
Figure 11 is second of spectrogram of white light source in the prior art；
Figure 12 is a kind of spectrogram of near-nature forest radiant in the prior art.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
The explanation of technical term:
1. relative spectral power:
A kind of spectrum that light source is emitted is frequently not single wavelength, but by the mixed radiation of many different wave lengths institute
Composition.The spectral radiance of light source is known as the spectral power distribution of light source by wavelength order and the distribution of each Wavelength strength.
Parameter for characterizing spectral power size is divided into absolute spectral power and relative spectral power.And then absolute spectrum
Power distribution curve: refer to curve made by the various wavelength light energy absolute values with spectral radiance；
Relative spectral power distributions curve: referring to that the energy by the various wavelength of radiation of light source spectrum is compared to each other, and makees
The spectral power distribution for changing radiant power only within the limits prescribed.The maximum phase of radiant power
It is 1 to spectral power, the relative spectral power of other wavelength is respectively less than 1.
2. color ratio:
Any white light can be mixed to get by Red Green Blue with corresponding proportion, in order to indicate that R, G, B three primary colors are each
Relative scale in comfortable white light total amount introduces chromaticity coordinate r, g, b, wherein r=R/ (R+G+B), g=G/ (R+G+B), b
=B/ (R+G+B), r+g+b=1, r, g, b are respectively red light color ratio, green light color ratio, blue light color ratio.
In order to illustrate technical solutions according to the invention, it is described in detail below in conjunction with specific accompanying drawings and embodiments.
Referring to Fig. 1, the embodiment of the present invention provides a kind of optimization method of LED light source, include the following steps:
Step S101 chooses the first illuminator, and first illuminator is for issuing white light；
Step S102 optimizes the spatial distribution of first illuminator, the white light is optimized for the first near-nature forest light；
Step S103, according to the spatial distribution of the first near-nature forest light and the spatial distribution of natural light, determine described in
The wave band to be optimized of first near-nature forest light；
Step S104, according to second illuminator of waveband selection to be optimized；
Step S105 lights the first illuminator and according to the light flux ratio of preset first illuminator and the second illuminator
Two illuminators；
Step S106 optimizes first hair by adjusting the spatial distribution of first illuminator and the second illuminator
The combination spectrum of body of light and the second illuminator obtains quasi- natural light.
The LED light source optimization method issues the first near-nature forest light by the first illuminator, then by increasing by the second illuminator
The part that spectrum in the first near-nature forest light lacks is compensated, by the relative spectral power and optical parameter that set each wave band of spectrum
Zone of reasonableness makes the shape of combination spectrum by adjusting the spatial distribution of the first illuminator and the second illuminator in optimization process
Shape and corresponding optical parameter meet pre-provisioning request, obtain quasi- natural light.It being capable of more adjunction by the quasi- natural light that this method obtains
The feature of near-nature forest light solves that conventional light source spectrum is imperfect and subband missing and optical parameter is not up to standard asks
Topic is conducive to protect eyesight, protects health, be the technological break-through that technical field of LED illumination is of great significance.
The optimization method is explained in detail below.
In step S101 and S102, selection white-light emitting body is as the first illuminator first, with white-light emitting body work
For host emitter, the wave-length coverage that host emitter is included is larger, includes at least 400-640nm wave band.
White emitter in the present embodiment is using the structure of blue chip cooperation optical transition film, and certainly, the present invention is not
It is limited to this, the white light for meeting corresponding requirements can also be obtained by other structures.
In the present invention, optical transition film can be fluorescent film or phosphor film.The present embodiment is preferably fluorescent film, below
Content is described by taking fluorescent film as an example.
After step S102, white light is optimized for the first near-nature forest light, so that the white light is as close as natural light,
In optimization process, improve the relative spectral power of white light as far as possible, in this way, selecting the type of subsequent second illuminator
It is more simple, and be conducive to the optimization to two illuminator combination spectrums.
Specifically, in conjunction with Fig. 2, which illustrates the curve of spectrum of the first near-nature forest light, the first near-nature forest light after optimization
Reference color temperature include at least 2700-6000K, and in different reference color temperatures, the relative spectral power of each wave band can reach
To scheduled range.It specifically includes: when the colour temperature of the first near-nature forest light is 2700K-3000K, 480-500nm wave band
Relative spectral power is greater than 0.30；The relative spectral power of 500-640nm wave band is greater than 0.70；When the colour temperature of the first near-nature forest light
When for 4000K-4200K, the relative spectral power of 480-500nm wave band is greater than 0.45；The relative spectral of 500-640nm wave band
Power is greater than 0.65；When the colour temperature of the first near-nature forest light is 5500K-6000K, the relative spectral power of 480-500nm wave band
Greater than 0.4；The relative spectral power of 500-640nm wave band is greater than 0.60.
In visible light, wavelength and color corresponding relationship are as follows: red light (622~700nm), orange-colored light (597~
622nm), sodium yellow (577~597nm), green light (492~577nm), cyan light (475~492nm), blue light (435~
475nm), purple light (380~435nm).Above-mentioned 480-500nm wave band mainly includes that green light, small part blue light and small part are green
Light, 500-640nm wave band mainly include green light, yellow light and feux rouges.
With reference to natural light spectrum shown in Fig. 3 and the first near-nature forest light spectrum shown in Fig. 2, it is seen that in 400-
Wave band between 640nm, the two are closer to, but in the red light portion for being greater than 640nm, the first near-nature forest light exists apparent
Missing, shows as relative spectral power and sharply declines.Hence, it can be determined that requiring supplementation with feux rouges.In turn, it is related to selection to glow
The second illuminator, one side is used for and the combination of the first illuminator, obtains and is more nearly the illuminating ray of natural light；Another party
Face can lower blue light, which can confirm by basic research early period, about in basic research by supplementing feux rouges
Appearance can be described in detail later.
Therefore, in step s 103, the wave band to be optimized for determining the first near-nature forest light is 640-700nm；According to the requirement
The second illuminator is selected, which can at least issue the feux rouges of 640-700nm.Specifically it can be in the range
Between some smaller area, such as wave-length coverage is 680-700nm, and corresponding central wavelength is 690 ± 5nm.Central wavelength is usually wave
The central value of long range, and allow to have the adjustable section ± 2nm or so.The case where for different sections, central wavelength can also be
660nm, 670nm, 680nm etc., the present embodiment are not limited to a certain kind.Further, according to the spectrum of the first near-nature forest light
Curve, and by a large amount of combination spectrum pilot scale studies, it is (excellent to determine that the central wavelength of second illuminator is selected as 690 ± 5nm
Choosing), it is therefore intended that and the relative spectral power of 640-700nm feux rouges can be made after the combination of the first near-nature forest light spectrum as far as possible
Close to the spectrum of natural light.
It, can be according to two illuminators after determining the first illuminator and the second illuminator in step S104 and S105
Spectrum selects reasonable light flux ratio, i.e. the ratio between the luminous flux of the first illuminator and the light radiation of the second illuminator, claims herein
Be " initial luminous flux ratio ", can be preliminary according to the wave-length coverage and spectral signature of above-mentioned first near-nature forest light and feux rouges
Determine that the initial luminous flux ratio is feasible in the range of 2-10:1.Further, this may further determine that by experiment
Then initial luminous flux ratio shines according to preset initial luminous flux than lighting the first of respective numbers in the range of 2-5:1
Second illuminator of body and respective numbers, optimizes the process of combination spectrum.
The optimization process of step S106 be it is vital, it is main to pass through the luminous flux of the first illuminator of adjustment simultaneously and the
The light radiation of two illuminators, i.e., the spectrum for adjusting the two simultaneously optimize；Or individually adjust the first illuminator light it is logical
The light radiation of amount or the second illuminator, that is, the spectrum for adjusting some illuminator optimize；When the light relatively of combination spectrum
Spectral power (shape) and optical parameter are all satisfied when requiring, and confirmation obtains quasi- natural light.It is appreciated that should " it is required that " it is predetermined
Parameter area, can reasonably be set with reference to the parameter area that most of public is accepted in the art.
As a kind of embodiment of step S106, it is mainly adjusted by the driving current of the first illuminator and the second illuminator
The luminous flux of the first illuminator and the light radiation of the second illuminator are adjusted, during changing electric current, luminous flux or light
Amount of radiation changes correspondingly, which is to debug out the quasi- natural light met the requirements by adjusting electric current.
Further, during Optimization Debugging, the first illuminator and the second illuminator can connect different driving electricity
Road is independently driven by different electric currents.Certainly, if it can reach preset purpose by the adjustment of identical driving current
It is more highly preferred to.However, by a large amount of it is demonstrated experimentally that by applying identical driving current to the first illuminator and the second illuminator
Realize that quasi- natural light is not easily accomplished very much.
With specific reference to Fig. 4, step S106 includes following sub-steps:
S1: the driving current of the first illuminator and the second illuminator is adjusted, and monitors combination spectrum in real time, works as combination spectrum
Each wave band relative spectral power when reaching preset range, carry out step S2, otherwise repeat step S1；
S2: the optical parameter of detection combination spectrum carries out step S3, otherwise returns when optical parameter reaches preset range
Back into row step S1；
S3: actual ratio, the first illuminator of the light radiation of the luminous flux and the second illuminator of the first illuminator of record
Practical driving current and corresponding optical parameter with the second illuminator.
Above step discloses the specific implementation process of step S106, firstly, adjusting the respectively by adjusting driving current
The light radiation of the luminous flux of one illuminator and the second illuminator, combination spectrum can change at this time, by debugging several times
Later, the shape (relative spectral power of i.e. each wave band) Yu natural light of combination spectrum are close in allowed band, are confirmed at this time
Spectrum is met the requirements.On this basis, optical parameter is checked, if optical parameter meets preset range, it is determined that quasi- natural
The debugging of light terminates.At this point, at least to record the luminous flux of corresponding first illuminator and the light radiation of the second illuminator
Actual ratio, accurately to determine the ratio.Also need record driving current and above-mentioned optical parameter.The data are for being
The manufacturing of light source is submitted necessary information.
Preferably, the further spectrogram for saving corresponding quasi- natural light, chromaticity diagram, other electrical parameters, light efficiency parameter,
Red, green, blue color ratio parameter etc. information.Certainly, the various optical parameters of the first illuminator and the second illuminator, it is chosen at it
When can save, such as wave-length coverage, central wavelength, model, specification, rated current, light efficiency etc..
In one embodiment, the optical parameter that above-mentioned steps S2 is referred to includes at least colour temperature, chromaticity coordinates, color tolerance, shows
Colour index Ra, colour rendering index R9, colour rendering index R12 and blue light color ratio.
In the present embodiment, the preset range of color tolerance is less than 5, and the preset range of colour rendering index RA is to show greater than 90
The preset range of colour index R9 and colour rendering index R12 be greater than 80, the preset range of blue light color ratio be less than 5.7%, it is existing
The blue light color of near-nature forest radiant is higher than still.According to the result of study that academic journals such as international top " natures " are delivered,
In the cell of human retina, the cell for perceiving blue only has 5.7%, therefore blue light color ratio is reduced to 5.7% by the present embodiment
Below.Wherein, the preset range of colour rendering index R9 can be improved to 90 or more, and the preset range of colour rendering index R12 is greater than 80.
With further reference to Fig. 5 and Fig. 7, by the optimization of optimization and combination spectrum to the first illuminator, in spectral shape
In the case where meeting the requirements, colour rendering index Ra is increased to 97 or more, and colour rendering index R9 reaches 95 or more, and colour rendering index R12 reaches
80 or more, blue light color ratio can be reduced to 5.5% or less.
As further prioritization scheme, the blue light of 440nm is maximum to the injury of eyesight in blue light, and the present embodiment will also
The relative spectral power of 440nm blue light is as optical parameter to be detected.Blue light color ratio be lower than 5.7% in the case where, also into
One step determines that the relative spectral power of 440nm blue light need to be lower than 0.65.This is that existing eyeshield electronic equipment is difficult to realize.It is existing
" eyeshield " electronic product having, blue light color ratio is although lower, but the inhibition of maximum 440nm blue light is wherein injured to human eye
It is not obvious, eye-protecting function is very little.And other wavelength band components in blue light are necessary visual acuity, significantly inhibit
Not only eyeshield effect is unobvious for blue light, can also cause adverse effect to the visual acuity of the crowds such as children, child, such as due to indigo plant
The excessive missing of light ingredient, leads to anomalous trichromatism.The present embodiment by blue light color ratio be reduced to 5.7% it is below on the basis of,
Emphasis inhibits the intensity of 440nm blue light, can really play the role of protecting eyesight, and retain some blue light, so that white
Light is more nearly natural light.
Further, by above-mentioned steps S1-S3, the luminous flux of above-mentioned first illuminator and the light of the second illuminator are determined
The actual ratio of amount of radiation is 2-3:1.In the case where the colour temperature of quasi- natural light is different, which is slightly different, driving
Electric current is also slightly different.For every kind of colour temperature, corresponding data are recorded, to provide necessary data for the manufacture for light source.
Specifically during fabrication, several colour temperature products can be selected according to actual application demand.For example, the lamps and lanterns of office space are used for,
The higher product of colour temperature is generally selected, for the lamps and lanterns of household, generally selects the lower product of colour temperature.
In the present invention, step S1 is described: when each wave band relative spectral power of combination spectrum reaches preset range
When, step S2 is carried out, step S1 is otherwise repeated；It describes in step S2: when optical parameter reaches preset range, carrying out
Otherwise step S3 comes back for step S1.That is, there are the relative spectral powers of combination spectrum cannot reach preset range by step S1
A possibility that, a possibility that step S2 cannot reach preset range there is also optical parameter.At this time, it may be necessary to which step is repeated
S1 adjusts driving current.However, needing to consider other factors to solve when the number for adjusting driving current reaches a certain level
The certainly above problem.
In turn, in such a case, it is possible to which there are two types of selections, first, carrying out step S4: the formula of adjustment optical transition film
And/or concentration and/or thickness, then come back for step S1；Second, carrying out step S5: the middle cardiac wave of the second illuminator of adjustment
Long or increase central wavelength is different from the third illuminator of the second illuminator, then comes back for step S1.According to early period
Basic research, the relationship and feux rouges of available fluorescent film and spectrum optimization and the relationship of spectrum optimization, refer in corresponding theory
It leads down, can choose suitable mode adjusting and optimizing scheme.
Specifically, in the first embodiment, step S4 is carried out.Light of the fluorescent film of first illuminator to the first illuminator
Spectral structure and optical parameter have important influence, specifically include: first, the formula of fluorescent film mainly influences the light relatively of each wave band
Spectral power and colour rendering index；The formula refers to the component and proportion of phosphor material powder in fluorescent film.Second, the concentration of fluorescent film
It is main to influence colour rendering index and colour temperature；The concentration refer to be formulated determine in the case where, content size of the fluorescent powder in fluorescent film；
The thickness of third, fluorescent film mainly influences colour temperature.
In second of embodiment, carry out step S5: the central wavelength of the second illuminator of adjustment increases central wavelength
Different from the third illuminator of the second illuminator, it is allowed to optimize after combining with the first illuminator.By carrying out a large amount of base
Plinth research can determine that the second illuminator also has important influence to combination spectrum distribution and optical parameter.
Specifically, basic research one: the research of quasi- natural light spectrum.
Natural light in nature shines from the sun, and different periods of the natural light at all seasons or even in one day are equal
There is difference, is mainly shown as the difference of spectrum and colour temperature.The sunlight in early morning in spring most makes people feel comfortable, the embodiment of the present invention
In, the solar spectrum in early morning in spring may be selected as reference, the relative spectral power and optical parameter for being directed at natural light are set.
Certainly, this is a kind of preferred embodiment, and the natural light of other times can be equally used for setting standard as measurement standard
The relevant parameter requirement of natural light.Optimization method provided in an embodiment of the present invention be suitable for the various times natural light, only need by
Certain parameters, which are done, slightly to be adjusted.
Basic research two: the relationship of spectral shape and fluorescence film formulation.Studies have shown that its corresponding light of fluorescence film formulation
Spectral shape relationship is very big；The ratio for changing a certain powder in formula, will be directly changed the relative spectral power of its respective wavelength section,
Its ratio is bigger, and the relative spectral power of corresponding wavelength is bigger, while can also change colour rendering index.Based on this, work as spectral shape
When undesirable with aobvious finger, the ratio of certain powder can be increased or decreased according to specific waveband selection, or change certain powder
Chromaticity coordinates parameter.
Basic research three: the relationship of spectral shape and fluorescent film concentration.Studies have shown that in the case where being formulated constant, it is glimmering
Light powder concentration is higher, and the relative spectral power of 490-700nm also can be higher and higher, until being more than blue spectrum power, with indigo plant
The relative spectral power of light reduces, and colour temperature can decline therewith, photochromic also to change, and aobvious refer to also changes correspondingly.Based on this, Ke Yitong
Change concentration is crossed to change aobvious finger and colour temperature.But concentration has been adjusted to certain state, when colour temperature is still undesirable, also
The formula rate of various powder in fluorescent film need to be changed, just can ensure that the photochromic of different-colour meets international standard (i.e. standard color temperature
Chromaticity coordinates).
Basic research four: the relationship of spectral shape and colour temperature and fluorescence film thickness.Studies have shown that constant in formula and concentration
In the case where, fluorescence film thickness is bigger, and colour temperature is lower.It, can be by changing thickness tune when colour temperature is unsatisfactory for requiring based on this
Whole colour temperature, and other parameters are influenced smaller.
Basic research five: driving current and spectral shape variation relation.Studies have shown that driving current and spectral shape change
Relationship is: (1) increasing the driving current of any chip (blue chip or red light chips), it will change its corresponding spectrum function
Rate；(2) by adjusting the driving current of two kinds of chips, available optimal spectrum optimum results；(3) increase one of core
The driving current of piece can inhibit the relative spectral of another chip to increase its luminous flux.It, can be by adjusting driving based on this
The mode of electric current adjusts combination spectrum, and inhibits blue light, it can inhibits blue light by way of increasing red light chips.
Basic research six: the relationship of red light chips specification and light radiation.Studies have shown that red light chips specification and light radiation
The relationship of amount is: under constant drive-current condition, under normal circumstances, with the increase of Chip scale, light radiation meeting
Increase.Based on this, the specification of the selection optimal red light chips of cost performance can be determined according to final actual light flux ratio.It should
Cost performance most preferably refers to that specification is small as far as possible, but can satisfy welding requirements, and light efficiency is high as far as possible, and good reliability combines price.
The present invention has also carried out basic research seven: the relationship of the luminous flux of white-light emitting body and the optimization of quasi- natural light spectrum,
Basic research eight: the relationship of the light radiation of red light chips and the optimization of quasi- natural light spectrum.Basic research seven is carried out to be intended to find
The specification and fluorescence film formulation and concentration and thickness of (cost performance) optimal blue chip；It finds as far as possible so that the first illuminator
Blue chip and fluorescent film of the light of sending close to nature spectrum；Basic research eight is intended to find (cost performance) optimal feux rouges core
The specification of piece is found the optimum value for inhibiting the light radiation (specification) of red light chips of blue light relative spectral, and is sought as far as possible
Look for so that combination spectrum close to nature spectrum red light chips.
By above-mentioned theory guidance and a large amount of experimental debugging, it is determined that the specification of the first illuminator and the second illuminator and
Parameter.It is specific as follows:
First illuminator LED light source consisting is combined using a kind of wave band and the second illuminator of central wavelength, second shines
Body includes red light chips, and wave-length coverage is 640-700nm, and central wavelength is preferably 690 ± 5nm, and the first illuminator includes wave
The blue chip and optical transition film of a length of 450-480nm, it is further preferred that optical transition film is fluorescent film.First shines
The ratio between light radiation of the luminous flux of body and the second illuminator is that 2-3:1 can determine different-colour pair in debugging process
The specific luminous flux ratio answered.The red light chips and blue chip of respective numbers are selected according to the light flux ratio at manufacture end.
Further, which includes silica gel and fluorescent powder, and fluorescent powder is the master for influencing the first light characteristic
Factor is wanted, fluorescent powder includes: rouge and powder, green powder and yellowish green powder；
The chromaticity coordinates of rouge and powder is X:0.660~0.716, Y:0.340~0.286；
The chromaticity coordinates of green powder is X:0.064~0.081, Y:0.488~0.507；
The chromaticity coordinates of yellowish green powder is X:0.367~0.424, Y:0.571~0.545；
The weight ratio of rouge and powder, green powder and yellowish green powder are as follows:
Rouge and powder: green powder: yellowish green powder=(0.010~0.035): (0.018~0.068): (0.071~0.253)；
The concentration of fluorescent film is 17%~43%.
The thickness of fluorescent film is preferably 0.2-0.4mm.The partial size of rouge and powder, green powder and yellowish green powder is less than 15 μm, preferably 13
±2μm。
Further, rouge and powder is preferably nitride red fluorescent powder, it is highly preferred that the nitride red fluorescent powder includes
CaSrAlSiN3 (1113 structure).And green powder is preferably nitrogen oxide green fluorescent powder, it is highly preferred that the nitrogen oxides is green
Fluorescent powder includes BaSi2O2N2 (1222 structure).And the yellowish green powder preferably includes Y3Al5Ga5O12 (i.e. gallium doped yttrium aluminum
Garnet).CaSrAlSiN3 class nitride red fluorescent powder, BaSi2O2N2 class nitrogen oxide green fluorescent powder and Y3Al5Ga5O12
Yellow-green fluorescence powder can reach the chromaticity coordinates that respective fluorescent powder needs, and have better luminous intensity and stability, very
Suitable in the fluorescent powder of the embodiment of the present invention.The type of above-mentioned fluorescent powder is commercially available.
Embodiment 1 as fluorescent film:
A kind of fluorescent film, containing AB silica gel, CaSrAlSiN3 red fluorescence powder (chromaticity coordinates, X:0.660-0.716, Y:
0.286-0.340), BaSi2O2N2 green emitting phosphor (chromaticity coordinates, X:0.064-0.081, Y:0.488-0.507) and
Y3Al5Ga5O12 yellow-green fluorescence powder (chromaticity coordinates, X:0.367-0.424, Y:0.545-0.571)；Wherein, CaSrAlSiN3 is red
The weight ratio of color fluorescent powder, BaSi2O2N2 green emitting phosphor and Y3Al5Ga5O12 yellow-green fluorescence powder is (0.020-0.035):
(0.018-0.030): (0.140-0.253), the mass percentage of three kinds of fluorescent powders in fluorescent film are 33-43%.
The fluorescent film is excited by blue light, can get the white light for the near-nature forest light that colour temperature is 2700K-3000K: in spectrum,
The relative spectral that the relative spectral of 480-500nm wave band is greater than 0.30,500-640nm wave band is greater than 0.70.
Embodiment 2 as fluorescent film
A kind of fluorescent film, containing AB silica gel, CaSrAlSiN3 red fluorescence powder (chromaticity coordinates, X:0.660-0.716, Y:
0.286-0.340), BaSi2O2N2 green emitting phosphor (chromaticity coordinates, X:0.064-0.081, Y:0.488-0.507) and
Y3Al5Ga5O12 yellow-green fluorescence powder (chromaticity coordinates, X:0.367-0.424, Y:0.545-0.571)；Wherein, CaSrAlSiN3 is red
The weight ratio of color fluorescent powder, BaSi2O2N2 green emitting phosphor and Y3Al5Ga5O12 yellow-green fluorescence powder is (0.010-0.022):
(0.020-0.040): (0.080-0.140), the mass percentage of three kinds of fluorescent powders in fluorescent film are 25-35%.
The fluorescent film is excited by blue light, can get the white light for the near-nature forest light that colour temperature is 4000K-4200K: in spectrum,
The relative spectral that the relative spectral of 480-500nm wave band is greater than 0.45,500-640nm wave band is greater than 0.65.
Embodiment 3 as fluorescent film
A kind of fluorescent film, containing AB silica gel, CaSrAlSiN3 red fluorescence powder (chromaticity coordinates, X:0.660-0.716, Y:
0.286-0.340), BaSi2O2N2 green emitting phosphor (chromaticity coordinates, X:0.064-0.081, Y:0.488-0.507) and
Y3Al5Ga5O12 yellow-green fluorescence powder (chromaticity coordinates, X:0.367-0.424, Y:0.545-0.571)；Wherein, CaSrAlSiN3 is red
The weight ratio of color fluorescent powder, BaSi2O2N2 green emitting phosphor and Y3Al5Ga5O12 yellow-green fluorescence powder is (0.010-0.020):
(0.030-0.068): (0.071-0.130), the mass percentage of three kinds of fluorescent powders in fluorescent film are 17-27%.
The fluorescent film is excited by blue light, can get the white light for the near-nature forest light that colour temperature is 5500K-6000K: in spectrum,
The relative spectral that the relative spectral of 480-500nm wave band is greater than 0.40,500-640nm wave band is greater than 0.60.
As further improvement of this embodiment, the present embodiment uses 457.5-480nm (at least 457.5-460nm)
Blue chip, cooperate above-mentioned fluorescent film, other than obtaining the first near-nature forest light, also reside in promoted green light ratio.Numerous
Near-nature forest light LED technology research in, green light ratio be difficult to promoted.The embodiment of the present invention breaks through traditional technology one and is used to adopt
With the tradition of 450-455nm blue chip production white light source, the blue light core of 457.5nm-480nm or 457.5-460nm is selected
Piece obtains in the first near-nature forest light, the relative spectral power of green light is obviously improved in combination with above-mentioned fluorescent film.
It is shown the white-light spectrum in the present embodiment with reference to Fig. 2 and Fig. 8, Fig. 2, using the blue light core of 457.5nm-460nm
When piece, when green light relative spectral power is had reached in 0.5 or more, Fig. 8 using 452.5-455nm blue chip, green light is opposite
Spectrum is only between 0.35-0.38.
Further, using above-mentioned fluorescent film and blue chip, the first near-nature forest light can be obtained, in conjunction with Fig. 2, tool
There is following parameter:
When the colour temperature of the first near-nature forest light is 2700K-3000K, the relative spectral power of 480-500nm wave band is greater than
0.30；The relative spectral power of 500-640nm wave band is greater than 0.70；When the colour temperature of the first near-nature forest light is 4000K-4200K,
The relative spectral power of 480-500nm wave band is greater than 0.45；The relative spectral power of 500-640nm wave band is greater than 0.65；When
When the colour temperature of one near-nature forest light is 5500K-6000K, the relative spectral power of 480-500nm wave band is greater than 0.4；500-640nm
The relative spectral power of wave band is greater than 0.60.
After the first near-nature forest light and red light chips combination, the quasi- natural light colour temperature of acquisition is 2500-6500K, in conjunction with Fig. 5
To Fig. 7, in any colour temperature, the relative spectral power of red light is greater than 0.60；The relative spectral power of orange-colored light is greater than 0.55；
The relative spectral power of sodium yellow is greater than 0.50；The relative spectral power of green light is greater than 0.35；The relative spectral function of cyan light
Rate is greater than 0.30；The relative spectral power of blue light is less than 0.75 in the quasi- natural light；The relative spectral power of purple light is small
In 0.10,440nm blue light relative spectral power less than 0.65.Above-mentioned parameter is very close with natural light.It is basic herein
On, which also at least can satisfy following optical parameter requirement: for color tolerance less than 5, colour rendering index Ra is greater than 90, can be with
Greater than 97, colour rendering index R9 is greater than 90, and colour rendering index R12 is greater than 80, and blue light color ratio is less than 5.7%, and colour temperature is in 2700-6000K.
For the quasi- natural light, it should be mentioned that white light colour temperature is higher according to the rule that a large amount of conventional white light illuminates,
The ratio of its shortwave long component is higher, and blue light is higher, and high blue light harm health is the beyond all doubt fact, while high color temperature has
Conducive to identification is promoted, the bright sense of environment is promoted, the state of mind for promoting people is also generally acknowledged common sense, therefore, conventional high color
The white light of the high blue light of temperature is necessarily both advantageous and disadvantageous, it is difficult to take into account the demand of various aspects.And in the optimization method of the embodiment of the present invention,
Product higher for colour temperature, since its blue light color ratio is inhibited, and the blue light of 440nm can also be inhibited, can
Hide blue light harm, is conducive to protect eyesight and health；Higher color temperature can also be obtained simultaneously, and can satisfy efficient work
Make and the demand of visual effect, practicability are preferable.The low blue illumination light source of this high color temperature is difficult to realize in the prior art
's.
Also it should be mentioned that such as Fig. 5 and Figure 12, in the quasi- natural light, the case where requiring is all satisfied in spectrum and optical parameter
Under, the relative spectral power of 640-700nm feux rouges is obviously improved, this is also difficult to reality in existing near-nature forest radiant
It is existing, it is mainly shown as that the promotion of feux rouges and entire spectral shape and other optical parameters are difficult to take into account.The present embodiment is exactly based on
Above-mentioned a large amount of basic research and continuous optimization process are just able to obtain the quasi- natural light.640-700nm feux rouges has excellent
Health care, physical therapy, beautification function.Traditional near-nature forest radiant all the trend being decreased obviously can occur in the wave band after 640nm.
Such as Figure 12, the 640-700nm feux rouges relative spectral power of conventional white light or near-nature forest radiant is decreased obviously, such as Fig. 5 and Fig. 7,
The relative spectral power of the wave band feux rouges reaches 0.6 or more in the present embodiment.Wherein, wavelength is the feux rouges phase of 680~690nm
0.80 is greater than to spectral power；The feux rouges relative spectral power that wavelength is 622~680nm is greater than 0.60.
Also, by the test of different-colour light source, when the colour temperature of quasi- natural light is 2700K-3000K, 640-700nm
The relative spectral power of feux rouges is greater than 0.70；The colour temperature of quasi- natural light be 4000K-4200K when, 640-700nm feux rouges it is opposite
Spectral power is greater than 0.60；When the colour temperature of quasi- natural light is 5500K-6000K, the relative spectral power of 640-700nm feux rouges is big
In 0.50.
Also it should be mentioned that in numerous near-nature forest light LED technologies, green light ratio is difficult to promotion, is dragging down indigo plant
It is more difficult to promote green light in the case where light, while aobvious finger R12 corresponding with green light is also to be difficult to be promoted.The embodiment of the present invention
On the one hand by breakthrough orthodox practice (using 455-480nm blue chip), the blue chip of 457.5nm-480nm has been selected,
On the other hand it is dedicated to the exploitation of fluorescent film, works along both lines so that the relative spectral power of green light is obviously improved.While by
In the promotion of green light, at the same promoted it is aobvious refer to R12, also help somewhat to be able to maintain while inhibiting blue light compared with
High color temperature.Such as Figure 12, the green light relative spectral power in traditional near-nature forest light is lower than 0.3, such as Fig. 5 and Fig. 7, in the present embodiment
Green light relative spectral power reaches 0.4 or more, and colour rendering index R12 reaches 80 or more.
Also, by the test of different-colour light source, when the colour temperature of quasi- natural light is 2700K-3000K, 475-492nm wave
The green light relative spectral power of section is greater than 0.30；When the colour temperature of quasi- natural light is 4000K-4200K, the blueness of 475-492nm wave band
Light relative spectral power is greater than 0.40；When the colour temperature of quasi- natural light is 5500K-6000K, the green light of 475-492nm wave band is opposite
Spectral power is greater than 0.50.
Further, when manufacturing product, preferably by blue chip and red light chips upside-down mounting on substrate, fluorescence film thickness
Unanimously, it being covered on blue chip, is formed a film on chip by equipment, it is ensured that the fluorescent film consistency of different product is good,
And then can to avoid the problem of the difference of consistency caused by dispensing, meanwhile, so that the colour temperature of different product is in same BIN, color
Warm consistency is good.
It is appreciated that the present invention is not limited to flip-chip is used fluorescent glue can also be cooperated using formal dress chip structure
Body forms the first illuminator.
In conclusion the optimization method of LED light source provided in an embodiment of the present invention has the following technical effect that
First, the quasi- natural light that spectrum is more nearly natural light spectrum, i.e., each wave band can be obtained based on the optimization method
Relative spectral power close to natural light, illuminated compared to conventional white light, visual experience is more comfortable, be conducive to protect the mankind and
The health of animals and plants.
Second, which predefines a kind of white-light emitting body, it is made to generate near-nature forest light, on this basis, choosing
A kind of red emitting luminophores are taken to carry out light filling, it is final to obtain spectrum and the satisfactory quasi- natural light of optical parameter, solve tradition
Method spectrum is imperfect and is difficult to the problem of taking into account optical parameter.
Third, the blue light being harmful to the human body are inhibited, and are conducive to that the eyesight of eyesight, especially children, child is protected to protect
Shield and improvement have great importance；Also, the disease incidence for being chronically at crowd under high blue illumination environment is advantageously reduced, is protected
Hinder health.
4th, while realizing low blue light, it is able to maintain higher color temperature, and then can while promoting Health Category
High-resolution, the visual effect of high identification are kept, and keeps the state of positive efficient operation, is suitable for healthy public illumination.
5th, it is able to ascend green light relative spectral power while reducing blue light, is solved long in the research of near-nature forest light
Phase there are the problem of so that quasi- natural light is more nearly true nature light, colour rendering index is further promoted.
6th, it is able to ascend the relative spectral power of feux rouges, so that spectrum is more nearly natural light, and 640-700nm is red
Light has healthcare function, improves the Health Category of quasi- natural lighting.
7th, it is based on above-mentioned optimization method, selects suitable first illuminator and the according to finally determining light flux ratio
Two illuminators, cooperate substrate and circuit that can make quasi- natural light LED light source, and the result of optimization can be directly used for the ginseng at manufacture end
Data are examined, are purchased convenient for the selection of chip.
8th, which can select miniature white-light emitting body according to finally determining light flux ratio
And red emitting luminophores, and few as far as possible red emitting luminophores and white-light emitting body are selected, it is fabricated to miniature single light source, for various
In lamps and lanterns, any combination can guarantee its preferable illumination effect, be not in blackening, speck or the non-uniform problem of light mixing,
It is adaptable.
The structure of the quasi- natural light LED light source is briefly explained further below.
With reference to Fig. 9, the quasi- natural light LED light source include basal layer 91, at least one set being set on basal layer 91 shine
Component 92, and the circuit 93 being electrically connected with luminescence component 92；Every group of luminescence component 92 includes white-light emitting body 921 (above-mentioned the
One illuminator) and red emitting luminophores 922 (above-mentioned second illuminator), white-light emitting body 921 includes blue chip and optical transition
Film (fluorescent film or phosphor film), red emitting luminophores 922 include red light chips；The white light and feux rouges that white-light emitting body 921 emits are sent out
The feux rouges mixing of body of light transmitting, the feux rouges are formed quasi- natural for compensating the red light portion that white light is lacked relative to natural spectrum
Light；The quasi- natural light has spectrum and optical parameter involved in optimization method of the present invention.Wherein, at least meet red, green, blue wave
The requirement of the requirement of section relative spectral power and colour temperature, aobvious finger, color tolerance.
Further, basal layer 91 is equipped with reflector 94, and basal layer 91, luminescence component 92 are set in reflector 94,
Circuit 93 is formed in the surface of basal layer 91, and the bottom of reflector 94 is exposed and white-light emitting body 921 and red light-emitting
Body 922 connects.
Further, fluorescent film can form a film in manufacturing process by the way that equipment is unified, good product consistency, high reliablity,
And light source volume is small.
The quasi- natural light LED light source selects miniature white-light emitting body and red emitting luminophores, the light radiation of red emitting luminophores
Amount is less than the luminous flux of white-light emitting body, can choose few as far as possible red emitting luminophores and white-light emitting body, is fabricated to single light
One group of luminescence component is arranged in source, i.e. a light source.Since the light source can directly issue quasi- natural light, and then can be used for various
In lamps and lanterns, any combination can guarantee its preferable illumination effect, adaptable.It is of course also possible to by multi-group light-emitting component set
In Cheng Yuyi light source, preferable light-out effect still can guarantee at this time, only size increases.The embodiment of the present invention is not limited to one
The quantity for the luminescence component that light source is included.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of optimization method of LED light source, which is characterized in that include the following steps:
The first illuminator is chosen, first illuminator is for issuing white light；
The white light is optimized for the first near-nature forest light by the spatial distribution for optimizing first illuminator；
According to the spatial distribution of the first near-nature forest light and the spatial distribution of natural light, the first near-nature forest light is determined
Wave band to be optimized；
According to second illuminator of waveband selection to be optimized；
The first illuminator and the second illuminator are lighted according to the light flux ratio of preset first illuminator and the second illuminator；
By adjusting the spatial distribution of first illuminator and/or the second illuminator, optimize first illuminator and second
The combination spectrum of illuminator obtains quasi- natural light.
2. the optimization method of LED light source as described in claim 1, which is characterized in that first illuminator includes blue light core
Piece and the optical transition film for covering the blue chip, the optical transition film include colloid and are uniformly mixed in the colloid
Optical transition material；
The step that the white light is optimized for the first near-nature forest light includes: by the spatial distribution of the optimization first illuminator
Adjust the formula and/or concentration and/or thickness of the optical transition film, 480- in the white light for issuing the first illuminator
The relative spectral power that the relative spectral power of 500nm wave band is greater than 0.30,500-640nm wave band is greater than 0.60.
3. the optimization method of LED light source as claimed in claim 2, which is characterized in that in optimization first illuminator
Spatial distribution, the white light is optimized in the step of the first near-nature forest light, the colour temperature of the first near-nature forest light is
When 2700K-3000K, the relative spectral power of 480-500nm wave band is greater than 0.30；The relative spectral power of 500-640nm wave band
Greater than 0.70；
When the colour temperature of the first near-nature forest light is 4000K-4200K, the relative spectral power of 480-500nm wave band is greater than
0.45；The relative spectral power of 500-640nm wave band is greater than 0.65；
When the colour temperature of the first near-nature forest light is 5500K-6000K, the relative spectral power of 480-500nm wave band is greater than 0.4；
The relative spectral power of 500-640nm wave band is greater than 0.60.
4. the optimization method of LED light source as claimed in claim 3, which is characterized in that the optical transition film be fluorescent film or
Phosphor film, the optical transition material are fluorescent powder or phosphor powder；For emitting the fluorescent powder of the first near-nature forest light
It include: rouge and powder, green powder and yellowish green powder；
The chromaticity coordinates of the rouge and powder is X:0.660~0.716, Y:0.340~0.286；
The chromaticity coordinates of the green powder is X:0.064~0.081, Y:0.488~0.507；
The chromaticity coordinates of the yellowish green powder is X:0.367~0.424, Y:0.571~0.545；
The weight ratio of the rouge and powder, green powder and yellowish green powder are as follows:
Rouge and powder: green powder: yellowish green powder=(0.010~0.035): (0.018~0.068): (0.071~0.253)；
The concentration of the fluorescent film is 17%~43%.
5. the optimization method of LED light source as claimed in claim 4, which is characterized in that the fluorescent film with a thickness of 0.2-
0.4mm；The partial size of the rouge and powder, green powder and yellowish green powder is less than 15 μm.
6. the optimization method of LED light source as claimed in claim 3, which is characterized in that the wave band to be optimized is 640-
700nm；Second illuminator is used to issue the feux rouges of 640-700nm.
7. the optimization method of LED light source as claimed in claim 6, which is characterized in that described by adjusting first hair
The spatial distribution of body of light and the second illuminator optimizes the combination spectrum of first illuminator and the second illuminator, obtains standard certainly
So the step of light includes:
S1: the driving current of first illuminator and the second illuminator is adjusted, and monitors the combination spectrum in real time, when described
When each wave band relative spectral power of combination spectrum reaches preset range, step S2 is carried out, step S1 is otherwise repeated；
S2: detecting the optical parameter of the combination spectrum, when the optical parameter reaches preset range, carries out step S3, no
Then come back for step S1；
S3: actual ratio, first hair of the luminous flux of first illuminator and the light radiation of the second illuminator are recorded
The practical driving current and corresponding optical parameter of body of light and the second illuminator.
8. the optimization method of LED light source as claimed in claim 7, which is characterized in that when the step S1 number of repetition reaches
When pre-determined number, step S4 is carried out: adjusting the formula and/or concentration and/or thickness of the optical transition film, then come back for
Step S1；
Alternatively, carrying out step S5: the central wavelength of adjustment second illuminator increases central wavelength different from the second hair
The third illuminator of body of light, then comes back for step S1.
9. the optimization method of LED light source as claimed in claim 8, which is characterized in that in the step S4, by adjusting described
The formula of optical transition film adjusts the relative spectral power and/or colour rendering index of each wave band；
Colour rendering index and/or colour temperature are adjusted by adjusting the concentration of the optical transition film；
Colour temperature is adjusted by adjusting the thickness of the optical transition film.
10. the optimization method of LED light source as claimed in claim 7, which is characterized in that the optical parameter includes at least color
Temperature, chromaticity coordinates, color tolerance, colour rendering index Ra, colour rendering index R9, colour rendering index R12 and blue light color ratio；The color tolerance it is pre-
Determine range be less than 5, the preset range of the colour rendering index Ra be greater than 90, the preset range of the colour rendering index R9 be greater than
The preset range of 90, colour rendering index R12 are greater than 80, and the preset range of the blue light color ratio is less than 5.7%.
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| CN115763672A (en) * | 2023-01-09 | 2023-03-07 | 四川世纪和光科技发展有限公司 | Near-natural light LED packaging component, packaging method and lighting device |
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| WO2020000511A1 (en) | 2020-01-02 |
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