High color quality parameter spectrum LED light source and preparation method thereof

Abstract

The invention relates to the field of LED technology, in particular to a high color quality parameter spectrum LED light source and a preparation method thereof. A bracket is provided with a bowl and positive and negative electrodes, a plurality of LED chips are arranged in the bowl, and fluorescent glue is wrapped around each LED chip; the fluorescent glue is formed by preparing a 4000K fluorescent glue solution, the 4000K fluorescent glue solution is a mixture of glue and blue powder with an emission wavelength of 460-470nm, blue-green powder with an emission wavelength of 490-500nm, green powder with an emission wavelength of 535-545nm, red powder with an emission wavelength of 630-640nm and infrared powder with an emission wavelength of 725-735nm, or a mixture of glue and blue powder with an emission wavelength of 460-470nm, blue-green powder with an emission wavelength of 490-500nm, green powder with an emission wavelength of 535-545nm and red powder with an emission wavelength of 650-660nm. It can reduce the packaging of LED chips with a main wavelength of 460‑470nm, reduce material costs, improve product color quality requirements, and meet the mainstream packaging needs of 3030 and 2835.

Description

Technical Field

[0001] The invention relates to the technical field of LEDs, in particular to a high color quality parameter spectrum LED light source and a preparation method thereof. Background Art

[0002] At present, the mainstream LED packaging forms of lamps in the market are 2835 and 3030 packaging forms, and these two packaging forms can only hold three LED chips at most. As people's living standards improve, the requirements for light color quality are getting higher and higher, requiring high color rendering index CRI, high TV lighting index TLCI-2012, high spectrum similarity SSI / high color reproduction TM-30-18 and high color quality index requirements. Based on the above situation, if the requirements are to be met, at least four types of LED chips are needed, namely LED chips with a peak wavelength of 395-405nm + LED chips with a main wavelength of 440-445nm + LED chips with a main wavelength of 450-455nm + LED chips with a main wavelength of 460-470nm. This will increase the cost of LED chips, and the mainstream packaging forms cannot meet the requirements. Summary of the invention

[0003] In order to solve the above problems, the present invention is specially developed to provide a high color quality parameter spectrum LED light source and its preparation method, which aims to solve the high color quality parameters while also being a relatively low-cost packaging method that can be applied in mainstream packaging forms. The spectrum similarity SSI (380-780nm)>94 is achieved, with excellent spectrum similarity parameters, and the natural light color is restored.

[0004] The technical solution of the present invention is: a high color quality parameter spectrum LED light source, which includes a plurality of LED chips, a bracket and fluorescent glue, the bracket has a bowl and positive and negative electrodes, the plurality of LED chips are arranged in the bowl, and each LED chip is connected to the positive and negative electrodes by gold wire bonding, the fluorescent glue is coated on each LED chip, and the plurality of LED chips include a first LED chip with a peak wavelength of 395-405nm, a second LED chip with a main wavelength of 440-445nm, and a third LED chip with a main wavelength of 450-455nm;

[0005] Wherein, the fluorescent glue is formed by preparing a 4000K fluorescent glue solution, and the 4000K fluorescent glue solution is a mixture of glue and blue powder with an emission wavelength of 460-470nm, blue-green powder with an emission wavelength of 490-500nm, green powder with an emission wavelength of 535-545nm, red powder with an emission wavelength of 630-640nm and infrared powder with an emission wavelength of 725-735nm; or, the 4000K fluorescent glue solution is a mixture of glue and blue powder with an emission wavelength of 460-470nm, blue-green powder with an emission wavelength of 490-500nm, green powder with an emission wavelength of 535-545nm and red powder with an emission wavelength of 650-660nm.

[0006] Optionally, the 4000K fluorescent glue solution is prepared by mixing glue: blue powder with an emission wavelength of 460-470 nm: blue-green powder with an emission wavelength of 490-500 nm: green powder with an emission wavelength of 535-545 nm: red powder with an emission wavelength of 630-640 nm: red powder with an emission wavelength of 725-735 nm in a mass ratio of 3:(1.2-2):

[0007] The ratio of (0.05-0.1):(1.0-1.3):(0.05-0.12):(0.8-1.2) is used.

[0008] Optionally, the 4000K fluorescent glue solution is prepared by the mass ratio of glue: blue powder with an emission wavelength of 460-470nm: blue-green powder with an emission wavelength of 490-500nm: green powder with an emission wavelength of 535-545nm: red powder with an emission wavelength of 650-660nm = 3: (1.2-2): (0.05-0.1): (1.0-1.3): (0.15-0.25).

[0009] Optionally, the bare die peak spectral energy ratio of the first LED chip, the second LED chip and the third LED chip is: e (395-405nm): Ф e (440-445nm): Ф e (450-455nm)=(0.6-0.9): (0.8-1.0): (0.6-1.0).

[0010] Optionally, the blue powder with an emission wavelength of 460-470 nm is Ca8MgSi4O 16 Cl2:Eu 2+ component, half-wave width is 30-40nm, and excitation wavelength is 375-420nm;

[0011] The blue-green powder with an emission wavelength of 490-500 nm is Lu3Al5O 12 :Ce3+ Component, half-wave width is 80-90nm;

[0012] The green powder with an emission wavelength of 535-545 nm is Lu3Al5O 12 :Ce 3+ component, half-wave width is 95-105nm;

[0013] The red powder with an emission wavelength of 630-640nm is composed of CaAlSiN3:Eu and has a half-wave width of 60-80nm;

[0014] The red powder with an emission wavelength of 650-660nm is composed of CaAlSiN3:Eu and has a half-wave width of 95-105nm;

[0015] The red powder with an emission wavelength of 725-735nm is Ga4GeO8:Cr 3+ Component, half-wave width is 140-160nm.

[0016] A method for preparing a high color quality parameter spectrum LED light source comprises the following steps:

[0017] S100: placing the first LED chip, the second LED chip and the third LED chip in the bowl, and fixing them on the bracket by using an insulating glue or silver glue with a die-bonding machine, and baking them in an oven at 150-160° C. for 2 h±10 min after the die-bonding is completed, so that the first LED chip, the second LED chip and the third LED chip are completely fixed in the bowl;

[0018] S200: Connecting the first LED chip, the second LED chip and the third LED chip to the positive and negative electrodes by gold wire bonding using a gold wire bonding machine;

[0019] S300: preparing a 4000K fluorescent glue solution to form the fluorescent glue, wherein the 4000K fluorescent glue solution is formed by mixing glue with blue powder having an emission wavelength of 460-470nm, blue-green powder having an emission wavelength of 490-500nm, green powder having an emission wavelength of 535-545nm, red powder having an emission wavelength of 630-640nm, and infrared powder having an emission wavelength of 725-735nm; or, the 4000K fluorescent glue solution is formed by mixing glue with blue powder having an emission wavelength of 460-470nm, blue-green powder having an emission wavelength of 490-500nm, green powder having an emission wavelength of 535-545nm, and red powder having an emission wavelength of 650-660nm;

[0020] S400: Pour the prepared 4000K fluorescent glue solution into the glue barrel of the glue dispensing machine. After the glue and bubbles are discharged, dispense the 4000K fluorescent glue solution into the bowl according to the color parameter requirements. After the dispensing is completed, bake at 80℃ / 0.5H+160℃ / 4H;

[0021] S500: After the LED is threshed after baking, it is spectroscopically tested according to the given color parameters, so that the light color quality formed in the bowl meets the S / P ratio and M / P ratio that are basically the same as the sunlight with the same color temperature, the color temperature meets the specified chromaticity standard coordinates, the chromaticity coordinates meet the 3-order color tolerance chromaticity standard, the SSI coefficient of similarity with the 4000K solar spectrum is >93, and the blue light hazard efficiency K B，V Blue light hazard efficiency K of sunlight with the same color temperature B，V Low, meets the blue light exemption RG0 standard.

[0022] Compared with the prior art, the high color quality parameter spectrum LED light source and the preparation method thereof of the present invention, after being excited by the LED chip, its fluorescent glue is equivalent to the luminous spectrum of the LED chip with a main wavelength of 460-470nm, and can replace and optimize the LED chip with a main wavelength of 460-470nm, thereby reducing the packaging of LED chips with a main wavelength of 460-470nm, reducing material costs, and at the same time can achieve the improvement of product color quality requirements and meet the mainstream packaging requirements of 3030 and 2835. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the high color quality parameter spectrum LED light source provided by the present invention.

[0024] Figure 2 This is a structural cross-sectional view of the high color quality parameter spectrum LED light source provided by the present invention.

[0025] Figure 3 This is a BIN diagram of the high color quality parameter spectrum LED light source provided by the present invention.

[0026] Figure 4 This is a bare crystal LED spectrum diagram of the high color quality parameter spectrum LED light source provided by the present invention.

[0027] Figure 5 This is a graph of the emission wavelength of 460-470nm blue powder of the high color quality parameter spectrum LED light source provided by the present invention.

[0028] Figure 6 This is a comparison chart of the similarity between the high color quality parameter spectrum LED light source provided in Example 1 of the present invention and the 4000K sunlight spectrum.

[0029] Figure 7The light color quality of the 4000K spectrum of the high color quality parameter spectrum LED light source provided in the first embodiment of the present invention satisfies the relative spectrum height diagram.

[0030] Figure 8 This is a comparison chart of the high color quality parameter spectrum LED light source provided in Example 1 of the present invention and the 4000K spectrum of sunlight.

[0031] Fig. 9 The blue light hazard efficiency K of the high color quality parameter spectrum LED light source provided in the first embodiment of the present invention is B，V .

[0032] Fig.10 This is a graph showing the TV lighting index TLCI-2012 results of the high color quality parameter spectrum LED light source provided in Example 1 of the present invention.

[0033] Fig.11 This is a test report diagram of the high color quality parameter spectrum LED light source provided in Example 1 of the present invention.

[0034] Fig.12 The light color quality of the 4000K spectrum of the high color quality parameter spectrum LED light source of the second embodiment of the present invention satisfies the relative spectrum height diagram.

[0035] Fig.13 This is a comparison chart of the similarity between the high color quality parameter spectrum LED light source provided in Example 2 of the present invention and the 4000K sunlight spectrum.

[0036] Fig.14 The blue light hazard efficiency K of the high color quality parameter spectrum LED light source provided in the second embodiment of the present invention is B，V .

[0037] Fig.15 This is a graph showing the TV lighting index TLCI-2012 results of the high color quality parameter spectrum LED light source provided in Example 2 of the present invention.

[0038] Fig.16 This is a test report diagram of the high color quality parameter spectrum LED light source provided in Example 2 of the present invention.

[0039] Reference numerals:

[0040] 10—positive and negative electrodes 11—first LED chip 12—second LED chip

[0041] 13 - the third LED chip 14 - bowl 15 - bracket

[0042] 16-Fluorescent glue. DETAILED DESCRIPTION

[0043] Surface bonding Figures 1 to 16The technical solution of the present invention is further described in detail. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Although this specification is described according to the implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should take the specification as a whole. The various embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0044] It should be noted that the blue light hazard efficiency K B，V To calculate, that is, the blue light hazard weighted radiance L B The ratio of the corresponding photometric value is calculated as:

[0045]

[0046] Among them, K m =683lm / W, V(λ) is the spectral luminous efficiency (or visibility function), and B(λ) is the blue light hazard weighting function. K B，V Characterizes the relative amount of blue light components in visible radiation. When the brightness of lighting products is the same, K B，V The higher it is, the more likely the light source is to harm the retina.

[0047] Embodiment 1.

[0048] Combination Figures 1-2 As shown, this embodiment provides a high color quality parameter spectrum LED light source, which includes a plurality of LED chips, a bracket and fluorescent glue, the bracket has a bowl and positive and negative electrodes, the plurality of LED chips are arranged in the bowl, and each LED chip is connected to the positive and negative electrodes by gold wire bonding, the fluorescent glue is coated on each LED chip, and the plurality of LED chips include a first LED chip with a peak wavelength of 395-405nm, a second LED chip with a main wavelength of 440-445nm and a third LED chip with a main wavelength of 450-455nm.

[0049] Among them, the fluorescent glue is formed by preparing a 4000K fluorescent glue solution, which is a mixture of glue and blue powder with an emission wavelength of 460-470nm, blue-green powder with an emission wavelength of 490-500nm, green powder with an emission wavelength of 535-545nm, red powder with an emission wavelength of 630-640nm and infrared powder with an emission wavelength of 725-735nm.

[0050] Furthermore, the 4000K fluorescent glue solution is prepared by the mass ratio of glue: blue powder with an emission wavelength of 460-470nm: blue-green powder with an emission wavelength of 490-500nm: green powder with an emission wavelength of 535-545nm: red powder with an emission wavelength of 630-640nm: red powder with an emission wavelength of 725-735nm = 3: (1.2-2): (0.05-0.1): (1.0-1.3): (0.05-0.12): (0.8-1.2). That is, the mass ratio of glue: blue powder with an emission wavelength of 460-470nm: blue-green powder with an emission wavelength of 490-500nm: green powder with an emission wavelength of 535-545nm: red powder with an emission wavelength of 630-640nm: red powder with an emission wavelength of 725-735nm can be 3:1.2:0.05:1.0:0.05:0.8 or 3:2:0.1:1.3:0.12:1.2 or 3:1.6:0.08:1.13:0.09:1.

[0051] Specifically, the bare die peak spectral energy ratio of the first LED chip, the second LED chip and the third LED chip is: e (395-405nm): Ф e (440-445nm): Ф e (450-455nm) = (0.6-0.9): (0.8-1.0): (0.6-1.0). Figure 4 This is the spectrum diagram of the bare die LED of this embodiment. e (395-405nm): Ф e (440-445nm): Ф e (450-455nm) can specifically be 0.6:0.8:0.6 or 0.9):1.0:1.0 or 0.75:0.9:0.8.

[0052] More specifically, the blue powder with an emission wavelength of 460-470 nm is Ca8MgSi4O 16 Cl2:Eu 2+ The composition has a half-wave width of 30-40nm and an excitation wavelength of 375-420nm; the blue-green powder with an emission wavelength of 490-500nm is Lu3Al5O 12 :Ce 3+ composition, half-wave width is 80-90nm; the green powder with an emission wavelength of 535-545nm is Lu3Al5O 12 :Ce 3+The red powder with an emission wavelength of 630-640nm is CaAlSiN3:Eu, with a half-wave width of 60-80nm; the red powder with an emission wavelength of 650-660nm is CaAlSiN3:Eu, with a half-wave width of 95-105nm; the red powder with an emission wavelength of 725-735nm is Ga4GeO8:Cr 3+ Component, half-wave width is 140-160nm.

[0053] See Figure 5 This is the emission wavelength diagram of the 460-470nm blue powder of the high color quality parameter spectrum LED light source of this embodiment. After being excited by the LED chip, the fluorescent glue of the high color quality parameter spectrum LED light source of this embodiment is equivalent to the emission spectrum of the LED chip with a main wavelength of 460-470nm, which can replace and optimize the LED chip with a main wavelength of 460-470nm, thereby reducing the packaging of the LED chip with a main wavelength of 460-470nm, reducing the material cost, and at the same time achieving the improvement of the color quality requirements of the product, and also meeting the mainstream packaging requirements of 3030 and 2835.

[0054] See Figure 6 This is a comparison chart of the similarity between the high color quality parameter spectrum LED light source of this embodiment and the 4000K sunlight spectrum. It can be seen that the spectrum similarity SSI (350-830nm) of the high color quality parameter spectrum LED light source of this embodiment is greater than 94, with excellent spectrum similarity parameters, restoring the color of natural light, allowing people to experience nature and enjoy the sun bath.

[0055] Further, see Figure 7 The light color quality of the 4000K spectrum of the high color quality parameter spectrum LED light source of this embodiment satisfies the relative spectrum height diagram. In combination with the following Table 1, the 4000K spectrum content of the high color quality parameter spectrum LED light source of this embodiment can be known.

[0056]

[0057]

[0058] As can be seen from Table 1, the high color quality parameter spectrum LED light source of this embodiment has the following characteristics:

[0059] 1.350-480nm<0.6, 390-410nm<0.5, 500-700nm>0.7, 700-800nm>0.4, peak wavelength is between 620-650nm;

[0060] 2. Spectral content: Фe (380-399nm): Фe (400-499nm): Фe (500-599nm): Фe (600-699nm): Фe (700-1000nm) = (0.8-1.5%): (13.3%-14.3%): (24.0%-25.0%): (26.8%-27.8%): (32%-34%);

[0061] 3. Blue-violet light content Фe (350-499nm) <15%;

[0062] 4. The matching degree with the spectral content of sunlight reaches A+ standard, which is completely comparable to sunlight.

[0063] See further Figure 8 and Fig. 9 It can be seen that the blue light hazard efficiency K of the high color quality parameter spectrum LED light source of this embodiment is B，V =0.00512253, which is the blue light hazard efficiency K of sunlight with the same color temperature B，V (Low(K B，V / K B，V (4000K sunlight) = 93.87%), meets the blue light exemption RG0 standard, and the eye protection spectrum is healthier.

[0064] The 4000K light color and electrical parameters of the high color quality parameter spectrum LED light source of this embodiment are as follows in Table 2:

[0065]

[0066]

[0067] From Table 2, it can be seen that the light color parameters of the high color quality parameter spectrum LED light source of this embodiment meet the following requirements:

[0068] 1.Ra>95, R1-15>95;

[0069] 2. CQS (color quality index)>95;

[0070] 3.TM-30-20, Rg>98, Rf>95, Rf, skin>95

[0071] 4. TV lighting index TLCI-2012>99

[0072] 5.COI acid glycoside index ≤3.3, which can meet the medical lighting standards;

[0073] 6. Full spectrum index FSI<1.8, full spectrum color index FSCI>90, high spectrum saturation.

[0074] 7.GAI-BB (color gamut area index of sunlight at the same color temperature)>95, the color gamut representation of sunlight is high.

[0075] Furthermore, the high color quality parameter spectrum LED light source and sunlight S / P ratio, M / Pratio and SSI (spectral similarity) of this embodiment are as shown in Table 3:

[0076] project The present invention 4000K Sunlight 4000K contrast S / Pratio 1.89 1.88 100.53％ M / Pratio 0.788 0.785 100.38％ MDER Melanopic Daylight Equivalent Efficiency 0.717 0.714 100.38％ SSI (350-830nm) 94 100

[0077] See Fig.10 It can be seen that the TV lighting index TLCI-2012 result of the high color quality parameter spectrum LED light source of this embodiment is:

[0078] 1. The S / P ratio (dark-light visual brightness ratio) is basically the same as the sunlight with the same color temperature of 4000K, which is conducive to relaxing the eyes, creating a comfortable and healthy light environment and allowing objects to be seen clearly and brightly;

[0079] 2. The M / P ratio (non-photopic brightness ratio) is basically the same as sunlight with the same color temperature of 4000K, which inhibits the secretion of melatonin and is conducive to learning;

[0080] 3. SSI (350-830nm) spectrum similarity, 100% restoration of natural light color, healthier and more ecological;

[0081] 4. High TLCI-2012 parameters, light shines on books or fonts, the restoration is clearer, and the human body or equipment can be seen more clearly.

[0082] 5.MDER, melanopsin equivalent daylight efficiency is the same as sunlight with the same color temperature of 4000K, which is conducive to eye relaxation and clearer vision;

[0083] 6.COI acid glycoside index ≤3.3, which can meet the medical lighting standards;

[0084] 7. Full spectrum index FSI<1.8, full spectrum color index FSCI>90, high spectrum saturation.

[0085] 8.GAI-BB (color gamut area index of sunlight at the same color temperature)>95, the color gamut representation of sunlight is high.

[0086] 9.730nm infrared height>0.8, which is conducive to the decomposition of large molecular water into small molecular water, which is eye protection and health.

[0087] The high color quality parameter spectrum LED light source test report of this embodiment can be found in Fig.11 .

[0088] Among them, the color parameters are:

[0089] Chromaticity coordinates (2 degrees): x-0.3806, y=0.3847 / u'=0.2221, v'=0.5051, duv=3.356e-003;

[0090] Correlated color temperature: Tc = 4059K, dominant wavelength: λd = 577.1nm, color purity: Purity = 29.78%;

[0091] Color ratio: R = 20.2%, G = 75.0%, B = 4.8%, peak wavelength: λp = 691.0nm, half width: Δλd = 308.3nm;

[0092] Color rendering index: Ra=98.3, AvgR=96.7, Kred=14.13%, R1=99.37, R2=97.91, R3=97.49, R4=97.52, R5=98.90, R6=98.52, R7=97.72, R8=97.47, R9=99.93, R10=96.45, R11=96.21, R12=95.94, R13=97.90, R14=98.52, R15=96.33;

[0093] TM30 parameters: Rf=95.9, Rg:99.4;

[0094] Photometric parameters:

[0095] Φ=41.10lm, luminous efficiency: 79.36lm / w, Φ e = 207.7mW, photoelectric efficiency = 40.1088%;

[0096] Photon (umol / s): 1.063e-001 [400~500nm], 2.575e-001 [500~600nm], 3.309e-001 [600~700nm];

[0097] Photosynthetic radiation parameters (400-700nm): photosynthetic photon flux PPF: 0.6942umo1 / s;

[0098] Photosynthetically active radiation flux PRF: 144.46mw;

[0099] Photosynthetic photon flux efficiency Eff (PPF): 1.34umo1 / s / W;

[0100] Electrical parameters:

[0101] Forward voltage VF = 8.632V, forward current IF = 59.99mA, power P = 517.9mw;

[0102] Classification: **[OUT], White light classification: OUT.

[0103] Embodiment 2.

[0104] The difference between this embodiment and the first embodiment is that the 4000K fluorescent glue solution is a mixture of glue and blue powder with an emission wavelength of 460-470nm, blue-green powder with an emission wavelength of 490-500nm, green powder with an emission wavelength of 535-545nm and red powder with an emission wavelength of 650-660nm.

[0105] Furthermore, the 4000K fluorescent glue solution is prepared by the mass ratio of glue: blue powder with an emission wavelength of 460-470nm: blue-green powder with an emission wavelength of 490-500nm: green powder with an emission wavelength of 535-545nm: red powder with an emission wavelength of 650-660nm = 3: (1.2-2): (0.05-0.1): (1.0-1.3): (0.15-0.25). That is, the mass ratio of glue: blue powder with an emission wavelength of 460-470nm: blue-green powder with an emission wavelength of 490-500nm: green powder with an emission wavelength of 535-545nm: red powder with an emission wavelength of 650-660nm can be 3:1.2:0.05:1.0:0.15 or 3:2:0.1:1.3:0.25 or 3:1.6:0.08:1.2:0.2.

[0106] See Table 4 below for the spectrum content of the high color quality parameter spectrum LED light source of this embodiment.

[0107] Band 380-399 400-499 500-599 600-699 700-780 Spectral content 0.015140555 0.220977959 0.373789281 0.378997316 0.058553761 Proportion 1.45％ 21.10％ 35.69％ 36.18％ 5.59％

[0108] See Fig.12 The light color quality of the 4000K spectrum of the high color quality parameter spectrum LED light source of this embodiment satisfies the relative spectrum height diagram. It can be seen that the high color quality parameter spectrum LED light source of this embodiment has the following characteristics:

[0109] 1.350-480nm<0.6, 390-410nm<0.5, 500-630nm>0.7, peak wavelength is between 620-650nm;

[0110] 2. Spectral content: Фe (380-399nm): Фe (400-499nm): Фe (500-599nm): Фe (600-699nm): Фe (700-780nm) = (1.2-2.2%): (20.5%-21.5%): (35.1%-36.1%): (35.6%-36.6%): (5%-6%);

[0111] 3. Blue-violet light content Фe (350-499nm) <23%.

[0112] See you further Fig.13 This is a comparison chart of the similarity between the high color quality parameter spectrum LED light source of this embodiment and the 4000K sunlight spectrum. It can be seen that the spectrum similarity SSI (380-780nm) of the high color quality parameter spectrum LED light source of this embodiment is greater than 94, with excellent spectrum similarity parameters, restoring the color of natural light, allowing people to experience nature and enjoy the sun bath.

[0113] Fig.14 is the blue light hazard efficiency K of the high color quality parameter spectrum LED light source of this embodiment B，V It can be seen that the blue light hazard efficiency K of the high color quality parameter spectrum LED light source of this embodiment is B，V =0.00533228, which is the same as the K of sunlight with the same color temperature B，V (Blue light hazard efficiency) low (K B，V / K B，V (4000Ksunlight) = 97.72%), meets the blue light exemption RG0 standard, and the eye protection spectrum is healthier.

[0114] The 4000K light color and electrical parameters of the high color quality parameter spectrum LED light source of this embodiment are as follows in Table 5:

[0115]

[0116]

[0117] From Table 2, it can be seen that the light color parameters of the high color quality parameter spectrum LED light source of this embodiment meet the following requirements:

[0118] 1.Ra>95, R1-15>95;

[0119] 2. CQS (color quality index)>95;

[0120] 3.TM-30-20, Rg>98, Rf>95, Rf, skin>95;

[0121] 4. TV lighting index TLCI-2012>99;

[0122] 5.COI acid glycoside index ≤3.3, which can meet the medical lighting standards;

[0123] 6. Full spectrum index FSI <3, full spectrum color index FSCI > 85, spectral saturation is relatively high;

[0124] 6.GAI-BB (color gamut area index of sunlight at the same color temperature)>95, the color gamut representation of sunlight is high.

[0125] Furthermore, the high color quality parameter spectrum of the LED light source of this embodiment and the sunlight S / P ratio, M / Pratio and SSI (spectral similarity) are as follows Table 6 ：

[0126] project Invention 4000K Case 2 Sunlight 4000K contrast S / Pratio 1.90 1.88 101.06％ M / Pratio 0.797 0.785 101.53％ MDER Melanopic Daylight Equivalent Efficiency 0.725 0.714 101.53％ SSI (350-830nm) 93 100

[0127] See Fig.15 The TV lighting index TLCI-2012 result of the high color quality parameter spectrum LED light source of this embodiment is:

[0128] 1. The S / P ratio (dark-light visual brightness ratio) is basically the same as the sunlight with the same color temperature of 4000K, which is conducive to relaxing the eyes, creating a comfortable and healthy light environment and allowing objects to be seen clearly and brightly;

[0129] 2. The M / P ratio (non-photopic brightness ratio) is basically the same as sunlight with the same color temperature of 4000K, which inhibits the secretion of melatonin and is conducive to learning;

[0130] 3. High TLCI-2012 parameters, light shines on books or fonts, the restoration is clearer, and the human body or equipment can be seen more clearly.

[0131] 4.MDER, melanopsin equivalent daylight efficiency is the same as sunlight with the same color temperature of 4000K, which is conducive to eye relaxation and clearer vision;

[0132] 5.COI acid glycoside index ≤3.3, which can meet the medical lighting standards;

[0133] 6.GAI-BB (color gamut area index of sunlight at the same color temperature)>95, the color gamut representation of sunlight is high.

[0134] The high color quality parameter spectrum LED light source test report of this embodiment can be found in Fig.16 .

[0135] Among them, the color parameters are:

[0136] Chromaticity coordinates (2 degrees): x-0.3833, y=0.3810 / u'=0.2253, v'=0.5039, duv=1.140e-003;

[0137] Correlated color temperature: Tc = 3954K, dominant wavelength: λd = 578.7nm, color purity: Purity = 29.4%;

[0138] Color ratio: R = 21.2%, G = 73.6%, B = 5.2%, peak wavelength: λp = 635.2nm, half width: Δλd = 211.7nm;

[0139] Color rendering index: Ra=98.8, AvgR=97.7, Kred=15.16%, R1=97.77, R2=99.62, R3=98.08, R4=99.24, R5=97.71, R6=97.67, R7=99.76, R8=99.19, R9=98.51, R10=96.91, R11=96.38, R12=96.69, R13=97.95, R14=98.74, R15=99.51;

[0140] TM30 parameters: Rf=97.3, Rg:100.6;

[0141] Photometric parameters:

[0142] Φ=67.87lm, luminous efficiency: 131.04lm / w, Φ e = 256.8 mW, photoelectric efficiency = 49.585%;

[0143] Photon (umol / s): 2.017e-001 [400~500nm], 4.171e-001 [500~600nm], 5.283e-001 [600~700nm];

[0144] Photosynthetic radiation parameters (400-700nm): photosynthetic photon flux PPF: 1.1464umo1 / s;

[0145] Photosynthetically active radiation flux PRF: 241.18mw;

[0146] Photosynthetic photon flux efficiency Eff (PPF): 2.21umo1 / s / W;

[0147] Electrical parameters:

[0148] Forward voltage VF = 8.633V, forward current IF = 59.99mA, power P = 517.9mw;

[0149] Classification: **[OUT], White light classification: ANSI_4000K.

[0150] Embodiment three.

[0151] This embodiment provides a method for preparing a high color quality parameter spectrum LED light source, which includes the following steps:

[0152] S100: placing the first LED chip, the second LED chip and the third LED chip in the bowl, and fixing them on the bracket by using an insulating glue or silver glue with a die-bonding machine, and baking them in an oven at 150-160° C. for 2 h±10 min after the die-bonding is completed, so that the first LED chip, the second LED chip and the third LED chip are completely fixed in the bowl;

[0153] S200: Connecting the first LED chip, the second LED chip and the third LED chip to the positive and negative electrodes by gold wire bonding using a gold wire bonding machine;

[0154] S300: preparing a 4000K fluorescent glue solution to form the fluorescent glue, wherein the 4000K fluorescent glue solution is formed by mixing glue with blue powder having an emission wavelength of 460-470nm, blue-green powder having an emission wavelength of 490-500nm, green powder having an emission wavelength of 535-545nm, red powder having an emission wavelength of 630-640nm, and infrared powder having an emission wavelength of 725-735nm; or, the 4000K fluorescent glue solution is formed by mixing glue with blue powder having an emission wavelength of 460-470nm, blue-green powder having an emission wavelength of 490-500nm, green powder having an emission wavelength of 535-545nm, and red powder having an emission wavelength of 650-660nm;

[0155] S400: Pour the prepared 4000K fluorescent glue solution into the glue barrel of the glue dispensing machine. After the glue and bubbles are discharged, dispense the 4000K fluorescent glue solution into the bowl according to the color parameter requirements. After the dispensing is completed, bake at 80℃ / 0.5H+160℃ / 4H;

[0156] S500: After the LED is threshed after baking, it is spectroscopically tested according to the given color parameters, so that the light color quality formed in the bowl meets the S / P ratio and M / P ratio that are basically the same as the sunlight with the same color temperature, the color temperature meets the specified chromaticity standard coordinates, the chromaticity coordinates meet the 3-order color tolerance chromaticity standard, the SSI coefficient of similarity with the 4000K solar spectrum is >93, and the blue light hazard efficiency K B，V Blue light hazard efficiency K of sunlight with the same color temperature B，V Low, meets the blue light exemption RG0 standard.

[0157] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high color quality parameter spectrum LED light source, characterized in that: It comprises a plurality of LED chips, a bracket and fluorescent glue, wherein the bracket has a bowl and positive and negative electrodes, the plurality of LED chips are arranged in the bowl, and each LED chip is connected to the positive and negative electrodes by gold wire bonding, the fluorescent glue is coated on each LED chip, and the plurality of LED chips include a first LED chip with a peak wavelength of 395-405nm, a second LED chip with a main wavelength of 440-445nm, and a third LED chip with a main wavelength of 450-455nm; The fluorescent glue is formed by preparing a 4000K fluorescent glue solution; The 4000K fluorescent glue solution is a mixture of glue and blue powder with an emission wavelength of 460-470nm, blue-green powder with an emission wavelength of 490-500nm, green powder with an emission wavelength of 535-545nm, red powder with an emission wavelength of 630-640nm and infrared powder with an emission wavelength of 725-735nm; the 4000K fluorescent glue solution is prepared by the mass ratio of glue: blue powder with an emission wavelength of 460-470nm: blue-green powder with an emission wavelength of 490-500nm: green powder with an emission wavelength of 535-545nm: red powder with an emission wavelength of 630-640nm: red powder with an emission wavelength of 725-735nm=3:(1.2-2):(0.05-0.1):(1.0-1.3):(0.05-0.12):(0.8-1.2); Alternatively, the 4000K fluorescent glue solution is a mixture of glue and blue powder with an emission wavelength of 460-470nm, blue-green powder with an emission wavelength of 490-500nm, green powder with an emission wavelength of 535-545nm and red powder with an emission wavelength of 650-660nm; the 4000K fluorescent glue solution is prepared by the mass ratio of glue: blue powder with an emission wavelength of 460-470nm: blue-green powder with an emission wavelength of 490-500nm: green powder with an emission wavelength of 535-545nm: red powder with an emission wavelength of 650-660nm = 3: (1.2-2): (0.05-0.1): (1.0-1.3): (0.15-0.25).

2. The high color quality parameter spectrum LED light source according to claim 1, characterized in that: The bare crystal peak spectral energy ratio of the first LED chip, the second LED chip and the third LED chip is: e (395-405nm): Ф e (440-445nm): Ф e (450-455nm)=(0.6-0.9): (0.8-1.0): (0.6-1.0).

3. The high color quality parameter spectrum LED light source according to claim 1, characterized in that: The blue powder with an emission wavelength of 460-470nm is Ca8MgSi4O 16 Cl2:Eu 2+ component, half-wave width is 30-40nm, and excitation wavelength is 375-420nm; The blue-green powder with an emission wavelength of 490-500 nm is Lu3Al5O 12 :Ce 3+ component, half-wave width is 80-90nm; The green powder with an emission wavelength of 535-545 nm is Lu3Al5O 12 :Ce 3+ component, half-wave width is 95-105nm; The red powder with an emission wavelength of 630-640nm is composed of CaAlSiN3:Eu and has a half-wave width of 60-80nm; The red powder with an emission wavelength of 650-660nm is composed of CaAlSiN3:Eu and has a half-wave width of 95-105nm; The red powder with an emission wavelength of 725-735 nm is Ga4GeO8:Cr 3+ Component, half-wave width is 140-160nm.

4. A method for preparing a high color quality parameter spectrum LED light source according to any one of claims 1 to 3, characterized in that: The following steps are involved: S100: placing the first LED chip, the second LED chip and the third LED chip in the bowl, and fixing them on the bracket by using an insulating glue or silver glue with a die-bonding machine, and baking them in an oven at 150-160° C. for 2 h±10 min after the die-bonding is completed, so that the first LED chip, the second LED chip and the third LED chip are completely fixed in the bowl; S200: Connecting the first LED chip, the second LED chip and the third LED chip to the positive and negative electrodes by gold wire bonding using a gold wire bonding machine; S300: preparing a 4000K fluorescent glue solution to form the fluorescent glue, wherein the 4000K fluorescent glue solution is formed by mixing glue with blue powder having an emission wavelength of 460-470nm, blue-green powder having an emission wavelength of 490-500nm, green powder having an emission wavelength of 535-545nm, red powder having an emission wavelength of 630-640nm, and infrared powder having an emission wavelength of 725-735nm; or, the 4000K fluorescent glue solution is formed by mixing glue with blue powder having an emission wavelength of 460-470nm, blue-green powder having an emission wavelength of 490-500nm, green powder having an emission wavelength of 535-545nm, and red powder having an emission wavelength of 650-660nm; S400: Pour the prepared 4000K fluorescent glue solution into the glue barrel of the glue dispensing machine. After the glue and bubbles are discharged, dispense the 4000K fluorescent glue solution into the bowl according to the color parameter requirements. After the dispensing is completed, bake at 80℃ / 0.5H+160℃ / 4H; S500: After the baked LED is threshed, it is spectroscopically tested according to the given color parameters, so that the light color quality formed in the bowl meets the S / P ratio and M / P ratio that are basically the same as the sunlight with the same color temperature, the color temperature meets the specified chromaticity standard coordinates, the chromaticity coordinates meet the 3-order color tolerance chromaticity standard, the SSI coefficient of similarity with the 4000K solar spectrum is >93, and the blue light hazard efficiency is the same as the blue light hazard efficiency K of the sunlight with the same color temperature. B，V Low, meets the blue light exemption RG0 standard.

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