CN104373838A - LED light source module and LED lamp - Google Patents

LED light source module and LED lamp Download PDF

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Publication number
CN104373838A
CN104373838A CN201410309675.4A CN201410309675A CN104373838A CN 104373838 A CN104373838 A CN 104373838A CN 201410309675 A CN201410309675 A CN 201410309675A CN 104373838 A CN104373838 A CN 104373838A
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light source
led
led light
light
blue
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CN104373838B (en
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余建华
陈日广
谌江波
鄂雷
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Shenzhen University
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Shenzhen University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F21S2/005—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • 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
    • F21Y2101/00—Point-like light sources

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Led Device Packages (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention discloses an LED light source module and an LED lamp. The LED light source module comprises a first LED light source, a second LED light source, a third LED light source and a fourth LED light source, wherein the first LED light source provides blue light and green light, the second LED light source provides warm white light, the third LED light source provides blue light, and the fourth LED light source provides red light. The first LED light source comprises a first blue LED chip with the peak wavelength ranging from 442 nm to 448 nm, and the first blue LED chip is coated with green fluorescent powder with the peak wavelength ranging from 500 nm to 520 nm. The second LED light source comprises a second blue LED chip with the peak wavelength ranging from 442 nm to 448 nm, and the second blue LED chip is coated with green fluorescent powder with the peak wavelength ranging from 525 nm to 540 nm and orange fluorescent powder with the peak wavelength ranging from 580 nm to 600 nm. The third LED light source comprises a third blue LED chip with the peak wavelength ranging from 470 nm to 490 nm. The fourth LED light source comprises a fourth red LED chip with the peak wavelength ranging from 627 nm to 635 nm. According to the LED light source module and the LED lamp, when the purpose that the color temperature is adjustable within the range from 2700 K to 6500 K is achieved, the color rendering index Ra and the color rendering index R9 are higher than 95, all the color rendering indexes from R1 to R15 are all higher than 90, and the chromaticity difference delta C is smaller than 0.0054.

Description

A kind of LED light source module and LED lamp
[technical field]
The present invention relates to LED illumination technology, particularly relate to a kind of LED light source module and LED lamp.
[background technology]
Along with the development of LED technology and the raising of human living standard, people no longer only require to illuminate to LED illumination, more stress the quality of illumination.The direct important parameter affecting quality of lighting is: the colour rendering index of light source and colour temperature.Optimal light source is natural daylight, and it has extraordinary colour rendering and multiple different colour temperature.But how can obtain the artificial light sources of the quality of lighting as natural daylight, be the dream of the mankind in the last hundred years always.So far, mankind's electric light source is from incandescent lamp to electricity-saving lamp, then LED till now, and having incandescent lamp only can access expansion light (whole colour rendering index R1 ~ R15 of incandescent lamp are more than 95) in development properties.Regrettably incandescent lamp only has fixing colour temperature, and power consumption poor efficiency, is about to be eliminated.In recent years, people are studying the New LED artificial light sources that how can obtain as natural daylight always: can either in wide scope (2700 ~ 6500K) adjustable color, the colour rendering index (R1 ~ R15 is more than 90) of superelevation can be kept again within the scope of this.Although there is part LED lamp, achieved (2700 ~ 6500K) adjustable color in wide scope, colour rendering index aspect is uneven.There are some LED light sources and light fixture can accomplish general colour rendering index Ra and special colour rendering index R9 all >=90, but are also only that these two indexes are higher, cannot realize all showing index all higher, thus simulating nature light.That current open source literature can inquire or existing LED light source on the market, cannot realize (2700 ~ 6500K) adjustable color in wide scope, and all colour rendering index R1 ~ R15 place all reaches high color rendering index (CRI), is more than or equal to 90.
[summary of the invention]
Technical problem to be solved by this invention is: make up above-mentioned the deficiencies in the prior art, a kind of LED light source module and LED lamp are proposed, realize colour temperature can timing in 2700K-6500K scope, colour rendering index Ra, R9 are more than 95, and all colour rendering index R1 ~ R15 is all more than 90, chromaticity difference △ C is less than 0.0054.
Technical problem of the present invention is solved by following technical scheme:
A kind of LED light source module, described LED light source module comprises the first LED light source providing blue green light, provides the second LED light source of warm white, provides the 3rd LED light source of blue light and provides the 4th LED light source of ruddiness; Described first LED light source comprises the first blue-light LED chip that peak wavelength is 442 ~ 448nm, it is coated with the green light fluorescent powder that peak wavelength is 500 ~ 520nm, luminous power ratio in the described blue green light provided shared by blue light is 0.33 ~ 0.49, and the luminous power ratio shared by green glow is 0.51 ~ 0.67; Described second LED light source comprises the second blue-light LED chip that peak wavelength is 442 ~ 448nm, it being coated with peak wavelength is the green light fluorescent powder of 525 ~ 540nm and the orange light phosphor powder of 580 ~ 600nm, luminous power ratio in the described warm white provided shared by blue light is 0 ~ 0.1, luminous power ratio shared by green glow is 0.25 ~ 0.33, and the luminous power ratio shared by orange light is 0.58 ~ 0.67; Described 3rd LED light source comprises the 3rd blue-light LED chip that peak wavelength is 470-490nm; Described 4th LED light source comprises the 4th red LED chip that peak wavelength is 627 ~ 635nm.
A kind of LED lamp, comprise radiator, reflection shield, diffuser plate and be provided with the substrate of LED light source module, described LED light source module comprises at least one group of LED light source module, described LED light source module is LED light source module as above, and described LED lamp also comprises four drive circuits and control circuit; The luminous flux proportioning of each LED light source and the mapping table between the colorimetric parameter mixing rear light source is stored in described control circuit, wherein under the luminous flux proportioning of each light source, each colorimetric parameter meets following condition: colour temperature is adjustable within the scope of 2700K ~ 6500K, general colour rendering index Ra >=95 of light source under each colour temperature, special colour rendering index R9 >=95, whole colour rendering index R1 ~ R15 all >=90, chromaticity difference △ C < 0.0054; Described control circuit needs the mixed colour temperature obtained to select the luminous flux proportioning of each LED light source corresponding according to user, determine the drive current of each LED light source according to the luminous flux proportioning of each LED light source, and export the drive current of calculating to corresponding drive circuit respectively; Described four drive circuits export the drive current of reception to corresponding LED light source respectively, drive corresponding LED light source luminous.
The beneficial effect that the present invention is compared with the prior art is:
LED light source module of the present invention and LED lamp, LED light source module is special the first blue-light LED chip arranged, second blue-light LED chip, the 3rd blue-light LED chip and the 4th red LED chip, by the cooperation of each LED chip wavelength and corresponding phosphor wavelength, thus produce the mixed light of specific light spectral power distributions.Follow-up in LED lamp time, coordinate control circuit in light fixture, the mapping table between the luminous flux proportioning of each light source satisfied condition and colorimetric parameter is prestored in control circuit, the colour temperature obtained as required selects the luminous flux proportioning of each light source, determine that drive current is exported to each light source and driven luminous thus, obtain the colour temperature needed, colour rendering index Ra, R9 of the light source simultaneously obtained are all >=95, and whole colour rendering index R1 ~ R15 is all >=90, chromaticity difference △ C < 0.0054.LED lamp in the present invention, realizing under colour temperature prerequisite adjustable within the scope of 2700K ~ 6500K, display index Ra, R9 are all >=95, and whole colour rendering index R1 ~ R15 all >=90, chromaticity difference △ C < 0.0054, even can reach≤0.0050, colorimetric parameter is better, close with natural daylight, the application of high request can be met by simulating nature light.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the LED lamp in the specific embodiment of the invention;
Fig. 2 is the circuit diagram of the LED lamp in the specific embodiment of the invention;
Fig. 3 is the structural representation of LED light source module in the LED lamp in the specific embodiment of the invention;
Fig. 4 is a kind of relative spectral power distributions figure combining lower each chip and fluorescent material chosen in the LED lamp in the specific embodiment of the invention;
Fig. 5 is that LED lamp in the specific embodiment of the invention is under a kind of combination and the relative spectral power distributions figure of the light of the four kinds of colors produced under one group of luminous power ratio;
Fig. 6 is the gamut range schematic diagram of the LED lamp light of three kinds of colors under a kind of combination and under one group of blue light ratio in the specific embodiment of the invention;
Fig. 7 is the method flow diagram calculating the luminous flux proportioning satisfied condition in the specific embodiment of the invention;
Fig. 8 is that LED lamp in the specific embodiment of the invention is under a kind of combination and the relative spectral power distributions figure of the white light obtained after mixed light under one group of luminous power ratio;
Fig. 9 is the preferred arrangement structural representation of multiple LED light source in LED lamp in the specific embodiment of the invention;
Figure 10 is the full-color degree illumination board design hot spot figure of LED lamp in the reference color temperature of 2700K ~ 6500K that in the specific embodiment of the invention, emulation testing obtains.
[detailed description of the invention]
Contrast accompanying drawing below in conjunction with detailed description of the invention the present invention is described in further details.
The present invention, on the basis building LED and light-emitting phosphor spectral model, furthers investigate LED mixed light scheme, under obtaining one group of LED light source assembled scheme, can realize irrealizable R1 ~ R15 in the past and all be more than or equal to the development properties of 90.Some LED light source assembled scheme in the past, such as publication date is on January 1st, 2014, publication number is in the LED lamp of CN103486466A, in any case control to adjust the luminous flux proportioning of each mixed light LED light source, all cannot obtain high R1 ~ R15 index, thus whole colour rendering index R1 ~ R15 also all >=90 when cannot realize Ra and R9 >=95 under a certain luminous flux proportioning, chromaticity difference △ C < 0.0054.This is determined by the build-in attribute participating in the spectral power distribution of the LED light source of mixed light under its LED mixed light scheme, when mixed light is the spectral power distribution in above-mentioned open scheme, because its spectral power distribution is determined, then no matter for another example what participates in the luminous power proportioning of each light of mixed light, also cannot realize whole colour rendering index R1 ~ R15 also all >=90.And under LED light source assembled scheme in the present invention, have adjusted the luminous power ratio of LED mixed light sources and each light component, thus obtain a kind of spectral power distribution of four kinds of light of participation mixed light newly, further combined with control and regulation, finally Ra and R9 >=95 can not only be realized, and whole colour rendering index R1 ~ R15 can also be realized all >=90, chromaticity difference △ C < 0.0054.Due to whole colour rendering index R1 ~ R15 all >=90, development properties, close to natural daylight, can meet the application of high request.
As illustrated in fig. 1 and 2, be structural representation and the circuit diagram of the LED lamp in this detailed description of the invention.LED lamp comprises radiator 1, reflection shield 2, diffuser plate 3 and is provided with the substrate 5 of LED light source module 4.Wherein, LED light source module 4 comprises at least one group of LED light source module (there is shown many groups), and LED lamp also comprises four drive circuits 701,702,703,704 and control circuit 6.
LED light source module 4 comprises many group LED light source modules, each group of LED light source module includes four LED light sources, be respectively the first LED light source 401 that blue green light is provided, the second LED light source 402 of warm white is provided, the 3rd LED light source 403 of blue light is provided and the 4th LED light source 404 of ruddiness is provided.
Wherein, the first LED light source 401 comprises the first blue-light LED chip that peak wavelength is 442 ~ 448nm, it is coated with the green light fluorescent powder that peak wavelength is 500 ~ 520nm, thus the first blue-light LED chip excites described green light fluorescent powder to produce blue green light.By regulating rubber powder ratio and the coated weight of green light fluorescent powder, make the luminous power ratio in the blue green light of generation shared by blue light be 0.33 ~ 0.49, the luminous power ratio shared by green glow is 0.51 ~ 0.67.In this detailed description of the invention, the blue-light LED chip that use peak wavelength is 445nm excites the green light fluorescent powder of 510nm, and the luminous power ratio in blue green light shared by blue light is 0.46, and the luminous power ratio shared by green glow is 0.54.
Second LED light source 402 comprises the second blue-light LED chip that peak wavelength is 442 ~ 448nm, it is coated with the mixed fluorescent powder of the orange light phosphor powder composition of green light fluorescent powder that peak wavelength is 525 ~ 540nm and 580 ~ 600nm, thus the second blue-light LED chip excites described mixed fluorescent powder to produce warm white.By regulating mixed proportion and the coated weight of each fluorescent material in mixed fluorescent powder, make the luminous power ratio in the warm white of generation shared by blue light be 0 ~ 0.1, the luminous power ratio shared by green glow is 0.25 ~ 0.33, and the luminous power ratio shared by orange light is 0.58 ~ 0.67.In this detailed description of the invention, use the mixed fluorescent powder that the blue-light LED chip that peak wavelength is 445nm excites the green light fluorescent powder of 535nm and the orange light phosphor powder of 585nm to form, luminous power ratio in warm white shared by blue light is 0.06, luminous power ratio shared by green glow is 0.31, and the luminous power ratio shared by orange light is 0.63.
3rd LED light source 403 comprises the 3rd blue-light LED chip that peak wavelength is 470-490nm, provides blue light.In this detailed description of the invention, use the blue-light LED chip that peak wavelength is 475nm.
4th LED light source 404 comprises the 4th red LED chip that peak wavelength is 627 ~ 635nm, provides ruddiness.In this detailed description of the invention, use the red-light LED that peak wavelength is 630nm.
When each LED light source arrangement forms LED light source module, can by preferred embodiment as shown in Figure 3, namely four LED light sources are according to square arrangement.By four LED light sources according to square arrangement, relative to according to mode arranged in a straight line, light can be converged better, thus better effects if after making each LED light source mixed light.Shown in figure, by square arrangement, be followed successively by clockwise: described first LED light source 401 providing blue green light, provides described second LED light source 402 of warm white, described 3rd LED light source 403 of blue light be provided and described 4th LED light source 404 of ruddiness is provided.Each LED light source in the square put in order not by limiting in figure, form square by other order and also can reach convergence light, the good effect of mixed light.
As shown in Figure 4, be the first LED light source (blue-light LED chip being 445nm by peak wavelength excites the green light fluorescent powder of 510nm) chosen in this detailed description of the invention, second LED light source (mixed fluorescent powder that the blue-light LED chip being 445nm by peak wavelength excites 535nm green light fluorescent powder and 585nm orange light phosphor powder to form), 3rd LED light source (blue-light LED chip of 475nm), the relative spectral power distributions figure of each chip, fluorescent material in the 4th LED light source (630nm red LED chip).In Fig. 4, B represents blue-light LED chip, and G represents green light fluorescent powder, and R represents red LED chip, and O represents orange light phosphor powder.Under combinations thereof, regulate fluorescent material rubber powder ratio, mixed proportion and coated weight, make the luminous power ratio in blue green light shared by blue light be 0.46, the luminous power ratio shared by green glow is 0.54; Luminous power ratio in warm white shared by blue light is 0.06, luminous power ratio shared by green glow is 0.31, the luminous power ratio of orange shared by light is 0.63, thus the relative spectral power distributions of blue green light, warm white, blue light and ruddiness that four LED light sources produce respectively as shown in Figure 5.In Fig. 5, B_G_O represents warm white, and B_G represents blue green light, and R_ represents ruddiness, and B_ represents blue light.Under combinations thereof and ratio, the chromaticity coordinates of the blue green light produced, warm white, blue light and ruddiness is respectively: (0.159,0.204), (0.403,0.463), (0.115,0.100), (0.698,0.301), its gamut range schematic diagram as shown in Figure 6.As can be seen from Figure 6, the square range that the chromaticity coordinates of the light of these four kinds of colors is formed, covers Energy Star gamut range, shows that light that four kinds of light under this chromaticity coordinates are mixed to get can realize colour temperature adjustable in the scope of 2700K ~ 6500K.
It should be noted that, when the combination of other value in selection range, in Fig. 5, the peak value of waveform has movement.When the luminous power ratio in blue green light, warm white shared by blue light, green glow, orange light is set to other value in scope, the relative power value under respective wavelength can change to some extent, and situation is opened in the compression of waveform can be different.But no matter waveform peak moves, or Wave-shrinking changes, generally at the blue-light LED chip of 442 ~ 448nm, the blue-light LED chip of 470-490nm, the red LED chip of 627 ~ 635nm, the green light fluorescent powder of 500-520nm, under the mixed fluorescent powder combination of the green light fluorescent powder of 525 ~ 540nm and the orange light phosphor powder composition of 580 ~ 600nm, blue green light, when in warm white, the luminous power ratio of corresponding light is in aforementioned range, after mixing, relative spectral power distributions figure and Fig. 5 of light is similar, the quadrangle that the chromaticity coordinates of the light of the four kinds of colors obtained is formed can cover Energy Star gamut range equally, it is adjustable in the scope of 2700K ~ 6500K that namely the light that four kinds of light is mixed to get can realize colour temperature equally.
In LED lamp during circuit unit work: store the luminous flux proportioning of each light source and the mapping table between the colorimetric parameter mixing rear light source in control circuit 6, wherein under the luminous flux proportioning of each light source, each colorimetric parameter meets following condition: colour temperature is adjustable within the scope of 2700K ~ 6500K, general colour rendering index Ra >=95 of light source under each colour temperature, special colour rendering index R9 >=95, whole colour rendering index R1 ~ R15 all >=90, chromaticity difference △ C < 0.0054; Control circuit needs the mixed colour temperature obtained to select the luminous flux proportioning of each light source corresponding according to user, determine the drive current of each light source according to the luminous flux proportioning of each light source, and the drive current of calculating is exported respectively to corresponding drive circuit 701,702,703 and 704.
The drive current of reception is exported to corresponding LED light source 401,402,403 and 404 by four drive circuits 701,702,703 and 704 respectively, drives corresponding LED light source luminous.No. four drive circuits 701,702,703 and 704 adopt the shaping modes of pulse width modulation PWM to drive four kinds of LED light sources respectively.PWM shaping modes regulable control be the pulsewidth of the input current of each LED light source, make LED light source always work in full amplitude current and zero, reduce the skew of chromatogram.Single-chip microcomputer can be utilized to adopt 16 bit timing devices to produce pwm signal, be divided into 65536 gray levels.Can control accuracy be improved like this, and make the change procedure of light soft.
Control circuit 6 regulates drive current by drive circuit, thus the luminous flux controlling each light source exports, the mixed white light be mixed to get under making LED lamp export corresponding light flux proportioning, thus the mixed white light exported under the colour temperature wanted, and under this colour temperature except general colour rendering index Ra, special colour rendering index R9 are all more than 95, and all colour rendering index R1 ~ R15 all more than 90.
Following detailed description, how to obtain luminous flux proportioning and after mixing light source colorimetric parameter between mapping table.
First, the colorimetric parameter such as the colour temperature of light source, colour rendering index and chromaticity difference is determined by the relative spectral power distributions of the four kinds of color of light participating in mixed light and luminous power proportioning.After mixed light, the calculating of the relative spectral power distributions S (λ) of light is as shown in formula (1):
S(λ)＝K 1*S 1(λ)+K 2*S 2(λ)+K 3*S 3(λ)+K 4*S 4(λ) (1)
Wherein, S 1(λ), S 2(λ), S 3(λ), S 4(λ) relative spectral power distributions of the blue green light of participation mixed light, warm white, blue light, ruddiness is respectively, K 1, K 2, K 3, K 4for participating in the luminous power proportioning corresponding to the blue green light of mixed light, warm white, blue light, red-light LED.So, want the colour temperature and development index of the light after determining mixed light, need know and participate in the relative spectral power distributions of LED of mixed light and the luminous power proportioning between them.As previously mentioned, when the LED chip of use and the peak wavelength of fluorescent material, when the amount of fluorescent material is determined, namely the spectral power distribution participating in four kinds of light of mixed light is (as shown in Figure 5) determined.Therefore, different luminous power proportioning combinations is set, different S (λ) can be obtained, and the value that S (λ) finally can affect colorimetric parameter (calculates colour temperature by S (λ), general colour rendering index Ra, the formula of the colorimetric parameters such as special colour rendering index R9, chromaticity difference and radiation efficiency is known).In sum, after different luminous power proportioning combined hybrid, light source has different colour temperatures, colour rendering index and chromaticity poor.
As shown in Figure 7, for calculating the method flow diagram of the luminous flux proportioning satisfied condition.As shown in Figure 7,1 is comprised the steps:) receive the relative spectral power distributions data of blue green light, warm white, blue light and ruddiness.2) assignment is carried out to blue green light luminous power proportioning K1, warm white luminous power proportioning K2, blue light luminous power proportioning K3 and ruddiness luminous power proportioning K4.3) colorimetric parameter of the rear light of mixing is calculated.Particularly, namely the relative spectral power distributions of mixed light is calculated according to above-mentioned formula (1), then the colorimetric parameter of the rear light source of mixing is calculated according to the relative spectral power distributions of light after mixing, these colorimetric parameters comprise colour temperature, general colour rendering index Ra, whole colour rendering index R1 ~ R15, chromaticity difference and radiation efficiency.Calculate above-mentioned colorimetric parameter according to the relative spectral power distributions S (λ) of light after mixing and have known computing formula, do not describe in detail at this.4) satisfied following condition is judged whether: after mixing, the colour temperature of light (can fluctuate in setting range in a certain scope of setting value, such as colour temperature setting value is 2700K, then colour temperature all can be considered that in the scope of 2695 ~ 2705K colour temperature is 2700K), general colour rendering index Ra >=95, special colour rendering index R9 >=95, whole colour rendering index R1 ~ R15 all >=90, chromaticity difference △ C < 0.0054, if, then enter step 5) export blue green light luminous power proportioning K1, warm white luminous power proportioning K2, the value that blue light luminous power proportioning K3 and ruddiness luminous power proportioning K4 is current, and the current colorimetric parameter value of correspondence, if not, then return step 2) assignment again, recalculates, until be met the blue green light luminous power proportioning K1 of condition, warm white luminous power proportioning K2, blue light luminous power proportioning K3 and ruddiness luminous power proportioning K4.
After being met the luminous power proportioning K1 of condition, K2, K3 and K4, owing to having corresponding relation between luminous power proportioning with luminous flux proportioning, therefore luminous flux proportioning can be calculated according to luminous power proportioning.Computing formula is:
&eta; n = K n * LER n &Sigma; n = 1 4 K n * LER n , n = ( 1,2,3,4 ) - - - ( 2 )
LER = a m &Integral; &lambda; S ( &lambda; ) * V ( &lambda; ) d&lambda; &Integral; &lambda; S ( &lambda; ) d&lambda; - - - ( 3 )
In formula, η n, K n, LER ncorresponding is respectively the luminous flux proportioning of each light source (during n=1 when corresponding blue green light, n=2 when corresponding warm white, n=3 when corresponding blue light, n=4 corresponding ruddiness), luminous power proportioning and radiation efficiency, a mvalue be 683lm/W, V (λ) be luminosity function, the relative power spatial distribution data that S (λ) is corresponding light source.
By above-mentioned computational methods, the luminous flux proportioning of each light source and the colour temperature mixing rear light source can be obtained, general colour rendering index Ra, special colour rendering index R9, whole colour rendering index R1 ~ R15, corresponding relation between chromaticity difference △ C, and colour temperature is adjustable in the scope of 2700K ~ 6500K, general colour rendering index Ra >=95 of the rear light source of mixing under each colour temperature, special colour rendering index R9 >=95, whole colour rendering index R1 ~ R15 all >=90, chromaticity difference △ C < 0.0054.
Still with the first LED light source chosen (blue-light LED chip being 445nm by peak wavelength excites the green light fluorescent powder of 510nm), second LED light source (mixed fluorescent powder that the blue-light LED chip being 445nm by peak wavelength excites 535nm green light fluorescent powder and 585nm orange light phosphor powder to form), 3rd LED light source (blue-light LED chip of 475nm), 4th LED light source (630nm red LED chip), and the luminous power ratio in the blue green light that sends of the first LED light source shared by blue light is 0.46, the luminous power ratio shared by green glow is 0.54; Luminous power ratio in the warm white that second LED light source sends shared by blue light is 0.06, luminous power ratio shared by green glow is 0.31, the luminous power ratio of orange shared by light be 0.63 situation be example explanation, the luminous flux proportioning of the mixed white light obtained and the corresponding relation of each colorimetric parameter as shown in Table 1 and Table 2, obtain mixing the relative power spatial distribution of rear white light as shown in Figure 8.
Table 1 mixes Ra, △ C and LER parameter of rear white light
Table 2 mixes R1 ~ R15 parameter of rear white light
From the data of table 1 and table 2, by control blue green light, warm white, the luminous flux proportioning of blue light, ruddiness four kinds of LED, the mixed light of colour temperature corresponding under can obtaining proportioning, the scope that colour temperature can realize from 2700K to 6500K is adjustable, simultaneously, except colour rendering index Ra and R9 is all more than 95, whole colour rendering index R1 ~ R15 also all more than 90, access expansion light.Chromaticity difference △ C is all less than 0.0054, and even can be less than and equal 0.0050, chromaticity difference performance is fine.Radiation light efficiency (LER) is at more than 290lm/W, and maximum radiation light efficiency (LER) is 332lm/W.
Known from the relative spectral power distributions figure of the mixed white light Fig. 8, it is adjustable that this LED lamp can realize in 2700K ~ 6500K reference color temperature.
LED lamp in this detailed description of the invention, adopting four kinds of LED light sources, is adopt mixed fluorescent powder generation warm white, blue-light LED chip generation blue light and the red LED chip that blue-light LED chip excites green light fluorescent powder generation blue green light, blue-light LED chip excites green light fluorescent powder and orange light phosphor powder composition to produce ruddiness respectively.By the cooperation of the luminous power ratio of the combination of the peak wavelength of certain limit and each light component, thus the four kinds of light obtaining specific light spectral power distributions carry out mixed light.Also only relate to the LED chip of three kinds of wave bands and the fluorescent material of three kinds of wave bands during mixed light, mixed light scheme is simple.During work, the electric current of different LED light sources is regulated by control circuit and drive circuit, thus regulate the luminous flux of different LED light source to export, regulate the proportioning of the luminous flux between them, mixed white light under colour temperature corresponding under obtaining each luminous flux proportioning, and the colorimetric parameter of white light is better, except Ra and R9 is more than 95, R1 ~ R15 is also all more than 90, access expansion light, colour rendering index is good, and chromaticity is poor simultaneously, radiation efficiency is also better, also can meet adjustable color, the LED lamp of this detailed description of the invention can meet the application of high request simultaneously.
Preferably, as shown in Figure 9, be the preferred arrangement schematic diagram of LED light source in LED lamp.In LED lamp, in LED light source module, multiple LED light source, according to circular arrangement, and provides the LED light source interval of the light of different colours to arrange.Be the situation of 5 groups of LED light source module LED light source consisting modules shown in Fig. 9, along circular arc shooting in each group LED light source module is warm white LED light source 402 successively, blue light LED light source 403, red-light LED light source 404, blue green light LED light source 401.The order of arc shooting does not limit by figure, also can be other order arrangement, such as blue green light LED light source 401, warm white LED light source 402, blue light LED light source 403, red-light LED light source 404, as long as the LED light source interval of the light of different colours is arranged in whole circle.
Further preferably, circular radius r is 35mm.When circular radius is that 35mm forms LED lamp, according to above-mentioned first LED light source (blue-light LED chip being 445nm by peak wavelength excites the green light fluorescent powder of 510nm), second LED light source (mixed fluorescent powder that the blue-light LED chip being 445nm by peak wavelength excites 535nm green light fluorescent powder and 585nm orange light phosphor powder to form), 3rd LED light source (blue-light LED chip of 475nm), the combination of the 4th LED light source (630nm red LED chip), and first luminous power ratio in the blue green light that sends of LED light source shared by blue light be 0.46, luminous power ratio shared by green glow is 0.54, luminous power ratio in the warm white that second LED light source sends shared by blue light is 0.06, and the luminous power ratio shared by green glow is 0.31, and the luminous power ratio shared by orange light is 0.63 composition LED lamp.Lighttools software is used to carry out analogue simulation, control circuit exports drive circuit to according to the luminous flux proportioning as shown in table 1 corresponding drive current that converts, control corresponding LED light source luminescence work, utilize the light that light source receiver reception LED lamp sends, light source receiver distance LED light source module circular array 43mm, obtains the full color illumination board design hot spot figure of LED lamp in the reference color temperature of 2700K ~ 6500K.As shown in Figure 10 a ~ 10h, be respectively full color illumination hot spot figure during 2700K, 3000K, 3500K, 4000K, 4500K, 5000K, 5700K, 6500K colour temperature, from each hot spot figure, the illumination of the LED lamp arranged in the manner described above is more even.
Still more preferably, in LED lamp, reflection shield is frosted reflection shield, and substrate is coated with reflectance coating, and diffuser plate is the one in PC diffuser plate, PMMA diffuser plate or ground glass, thus improve the hot spot effect of LED lamp, the uniformity of light utilization efficiency and emergent light.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, make some substituting or obvious modification without departing from the inventive concept of the premise, and performance or purposes identical, all should be considered as belonging to protection scope of the present invention.

Claims (9)

1. a LED light source module, is characterized in that: described LED light source module comprises the first LED light source providing blue green light, provides the second LED light source of warm white, provides the 3rd LED light source of blue light and provides the 4th LED light source of ruddiness; Described first LED light source comprises the first blue-light LED chip that peak wavelength is 442 ~ 448nm, it is coated with the green light fluorescent powder that peak wavelength is 500 ~ 520nm, luminous power ratio in the described blue green light provided shared by blue light is 0.33 ~ 0.49, and the luminous power ratio shared by green glow is 0.51 ~ 0.67; Described second LED light source comprises the second blue-light LED chip that peak wavelength is 442 ~ 448nm, it being coated with peak wavelength is the green light fluorescent powder of 525 ~ 540nm and the orange light phosphor powder of 580 ~ 600nm, luminous power ratio in the described warm white provided shared by blue light is 0 ~ 0.1, luminous power ratio shared by green glow is 0.25 ~ 0.33, and the luminous power ratio shared by orange light is 0.58 ~ 0.67; Described 3rd LED light source comprises the 3rd blue-light LED chip that peak wavelength is 470-490nm; Described 4th LED light source comprises the 4th red LED chip that peak wavelength is 627 ~ 635nm.
2. a LED lamp, comprise radiator, reflection shield, diffuser plate and be provided with the substrate of LED light source module, it is characterized in that: described LED light source module comprises at least one group of LED light source module, described LED light source module is LED light source module as claimed in claim 1, and described LED lamp also comprises four drive circuits and control circuit; The luminous flux proportioning of each LED light source and the mapping table between the colorimetric parameter mixing rear light source is stored in described control circuit, wherein under the luminous flux proportioning of each light source, each colorimetric parameter meets following condition: colour temperature is adjustable within the scope of 2700K ~ 6500K, general colour rendering index Ra >=95 of light source under each colour temperature, special colour rendering index R9 >=95, whole colour rendering index R1 ~ R15 all >=90, chromaticity difference △ C < 0.0054; Described control circuit needs the mixed colour temperature obtained to select the luminous flux proportioning of each LED light source corresponding according to user, determine the drive current of each LED light source according to the luminous flux proportioning of each LED light source, and export the drive current of calculating to corresponding drive circuit respectively; Described four drive circuits export the drive current of reception to corresponding LED light source respectively, drive corresponding LED light source luminous.
3. LED lamp according to claim 2, is characterized in that: in described LED light source module, four LED light sources are according to square arrangement.
4. LED lamp according to claim 2, is characterized in that: in described LED light source module, multiple LED light source is according to circular arrangement, and provides the LED light source interval of the light of different colours to arrange.
5. LED lamp according to claim 4, is characterized in that: the radius of described circle is 35mm.
6. LED lamp according to claim 2, is characterized in that: described four drive circuits adopt the mode of pulse width modulation (PWM) to regulate drive current.
7. LED lamp according to claim 2, is characterized in that: described reflection shield is frosted reflection shield.
8. LED lamp according to claim 2, is characterized in that: described substrate is coated with reflectance coating.
9. LED lamp according to claim 2, is characterized in that: described diffuser plate is PC diffuser plate, PMMA diffuser plate or ground glass.
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