A full spectrum light source and manufacturing method and application

Abstract

The application relates to the lighting technical field, and particularly discloses a full-spectrum light source and a manufacturing method and application. The full-spectrum light source comprises a light source chip and encapsulating glue, and the encapsulating glue is mixed with compounded fluorescent powder; the light source chip is a first waveband piece with an emission peak value of 410-420 nm, a second waveband piece with an emission peak value of 430-440 nm, a third waveband piece with an emission peak value of 445-460 nm and a fourth waveband piece with an emission peak value of 465-475 nm; and the compounded fluorescent powder is blue-green fluorescent powder with an emission peak value of 490-500 nm, green fluorescent powder with an emission peak value of 525-535 nm and red fluorescent powder with an emission peak value of 650-660 nm. The full-spectrum light source has full coverage of 380-780 nm, good spectral continuity, no obvious wave peak and wave trough, uniform spectral proportion without serious disorder, strong color rendering and close to the sunlight spectrum.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lighting, more particularly, it relates to a full-spectrum light source and a manufacturing method and application. BACKGROUND

[0002] With the continuous development of LED industry lighting, people not only require pure white light, but also pursue artificial light sources closer to sunlight, especially photography lighting, medical lighting, education lighting, etc. The manufacture of full-spectrum LED similar to the solar spectrum has become a research hotspot. Full-spectrum refers to the visible light region covering 380-780, and the spectrum is uniform and close to the solar spectrum. At present, the invention patent application with the application number CN2018105475819 and the publication date of November 6, 2018 discloses a kind of ultraviolet excitation full-spectrum LED, which includes ultraviolet LED chip and mixed fluorescent powder;The mixed fluorescent powder includes blue fluorescent powder, blue-green fluorescent powder, yellow-green fluorescent powder, orange-red fluorescent powder and deep red fluorescent powder with emission peak values of 445-450nm, 495-500nm, 540-545nm, 600-605nm and 640-645nm respectively. Figure 1 Its spectrum diagram of ultraviolet excitation full-spectrum LED has obvious wave peak and wave trough, and the blue-violet light spectrum peak value is high, the spectrum proportion is not uniform, and it needs to be further improved in order to be closer to the solar spectrum. SUMMARY

[0003] In order to improve the uniformity of spectrum proportion and be closer to the solar spectrum, the present application provides a kind of full-spectrum light source and a manufacturing method and application.

[0004] In the first aspect, the present application provides a kind of full-spectrum light source, adopts the following technical scheme:

[0005] A kind of full-spectrum light source, including light source chip and the encapsulation glue covered on light source chip, the encapsulation glue is mixed with compound fluorescent powder;The light source chip is the first wave band piece with emission peak value of 410-420nm, the second wave band piece with emission peak value of 430-440nm, the third wave band piece with emission peak value of 445-460nm, the fourth wave band piece with emission peak value of 465-475nm;The compound fluorescent powder is blue-green fluorescent powder with emission peak value of 490-500nm, green fluorescent powder with emission peak value of 525-535nm, red fluorescent powder with emission peak value of 650-660nm.

[0006] Optionally, the emission peak of the first waveband piece is 410-425 nm, the emission peak of the second waveband piece is 430-435 nm, the emission peak of the third waveband piece is 445-455 nm, and the emission peak of the fourth waveband piece is 465-470 nm; and / or, the emission peak of the blue-green fluorescent powder is 490-495 nm, the emission peak of the green fluorescent powder is 525-530 nm, and the emission peak of the red fluorescent powder is 650-655 nm.

[0007] The full-spectrum light source of the present application uses the cooperation of the first waveband piece, the second waveband piece, the third waveband piece, and the fourth waveband piece to match the blue-green fluorescent powder, the green fluorescent powder, and the red fluorescent powder, so that it covers the entire visible light spectrum of 380-780 nm, has good spectral continuity, no obvious peaks and troughs, uniform spectral proportion without serious disorder, strong color rendering, and is close to the solar spectrum. Ra> 97, R1-R15≥ 96, Rf> 98, Rg> 100, even R1-R15≥ 98, the color rendering index has obvious advantages, significantly improves the color reproduction and use effect, and is suitable for photographic lighting lamps, medical lighting lamps, educational lighting lamps, plant lighting lamps, decorative lighting lamps, traffic lighting lamps, and construction lighting lamps, and has a wide range of applications.

[0008] Optionally, the light flux ratio of the first waveband piece, the second waveband piece, the third waveband piece, and the fourth waveband piece is 1:(4-5):(24-28):(22-26); and / or,

[0009] The compounded fluorescent powder is made of the following raw materials in weight percentage: blue-green fluorescent powder 5-10%, green fluorescent powder 5-10%, and red fluorescent powder 82-87%.

[0010] By limiting the light flux ratio of the first waveband piece, the second waveband piece, the third waveband piece, and the fourth waveband piece, and limiting the raw material ratio of the compounded fluorescent powder, the full-spectrum light source can achieve a spectral distribution close to the solar spectrum and light quality.

[0011] Optionally, the light flux ratio of the first waveband piece, the second waveband piece, the third waveband piece, and the fourth waveband piece is 1:(4-5):(25-27):(23-25); and / or,

[0012] The compounded fluorescent powder is made of the following raw materials in weight percentage: blue-green fluorescent powder 8-9%, green fluorescent powder 8-9%, and red fluorescent powder 83-84%.

[0013] By adopting the technical scheme, the light flux ratio of the first wave band piece, the second wave band piece, the third wave band piece and the fourth wave band piece is optimized, and through mutual cooperation among them, the R1-R15 of the full spectrum light source is greater than or equal to 98. The raw material ratio of the compounded fluorescent powder is also optimized, and the R1-R15 of the full spectrum light source is also greater than or equal to 98, thereby enhancing the use effect.

[0014] Optionally, the half wave width of the first wave band piece is 10-20 nm, the half wave width of the second wave band piece is 15-25 nm, the half wave width of the third wave band piece is 15-25 nm, and the half wave width of the fourth wave band piece is 10-20 nm; and / or, the half wave width of the blue-green fluorescent powder is 30-40 nm, the half wave width of the green fluorescent powder is 100-110 nm, and the half wave width of the red fluorescent powder is 85-105 nm.

[0015] By adopting the technical scheme, the half wave width of the first wave band piece, the half wave width of the second wave band piece, the half wave width of the third wave band piece, the half wave width of the fourth wave band piece are optimized, and the half wave width of the blue-green fluorescent powder, the half wave width of the green fluorescent powder and the half wave width of the red fluorescent powder are also optimized, so that a light source with appropriate color temperature range can be formed, a full spectrum light source can be realized, the spectrum proportion is relatively uniform, the spectrum continuity is good, there is no obvious wave peak and wave trough, and the spectrum is close to the sunlight spectrum.

[0016] Optionally, the blue-green fluorescent powder is LuAG fluorescent powder, the green fluorescent powder is rare earth fluorescent powder, and the red fluorescent powder is silicon-based nitride fluorescent powder.

[0017] By adopting the technical scheme, the blue-green fluorescent powder, the green fluorescent powder and the red fluorescent powder are optimized, so that the selection of the blue-green fluorescent powder, the green fluorescent powder and the red fluorescent powder is facilitated, the matching between the LuAG fluorescent powder, the rare earth fluorescent powder and the silicon-based nitride fluorescent powder is good, the stability is good, and the service life is prolonged.

[0018] Optionally, the weight ratio of the packaging glue and the compounded fluorescent powder is 10:(0.5-3). Preferably, the weight ratio of the packaging glue and the compounded fluorescent powder is 10:(1-2.5). More preferably, the weight ratio of the packaging glue and the compounded fluorescent powder is 10:(1.5-2).

[0019] By adopting the technical scheme, the adding proportion of the compounded fluorescent powder in the packaging glue is optimized, so that the spectrum effect is ensured, the light flux is not affected, and the quality of the full spectrum light source is ensured. In multiple embodiments, the weight ratio of the packaging glue and the compounded fluorescent powder is 10:1.68, and the weight ratio can also be set to 10:0.5, 10:1, 10:1.5, 10:2, 10:2.5, 10:3, etc. according to needs.

[0020] Optionally, the encapsulation glue is glue, and the glue comprises A glue and B glue, and the volume ratio of the A glue to the B glue is (1-3):(1-3). In multiple embodiments, the volume ratio of the A glue to the B glue is 1:1, and the volume ratio can also be set to 1:2, 1:3, 2:1, 2:3, 3:1, 3:2, etc. according to needs.

[0021] Optionally, the first wave band piece, the second wave band piece, the third wave band piece and the fourth wave band piece are connected in series or in parallel.

[0022] By adopting the above technical solution, the electrical connection of the first wave band piece, the second wave band piece, the third wave band piece and the fourth wave band piece is facilitated. In multiple embodiments, the first wave band piece, the second wave band piece, the third wave band piece and the fourth wave band piece are connected in series, and the first wave band piece, the second wave band piece, the third wave band piece and the fourth wave band piece can also be connected in parallel according to needs.

[0023] In a second aspect, the application provides a manufacturing method of the full-spectrum light source, adopting the following technical solution: a manufacturing method of the full-spectrum light source, comprising the following steps:

[0024] S1, mixing encapsulation glue and compounded fluorescent powder to obtain fluorescent encapsulation glue;

[0025] S2, bonding the light source chip on the support, then pouring the fluorescent encapsulation glue on the support and covering the light source chip, and then curing, slitting to obtain a full-spectrum LED finished product light source.

[0026] By adopting the above technical solution, the preparation of the full-spectrum LED finished product light source is facilitated, and the preparation is simple, convenient, has no special requirements for equipment, and is suitable for batch industrial production.

[0027] Preferably, the curing temperature is 140-160℃, and the curing time is 1-3h. In multiple embodiments, the curing temperature is 150℃, and the curing time is 2h, and the curing temperature can also be set to 140℃, 145℃, 155℃, 160℃, etc. according to needs, and the curing time can also be set to 1h, 1.5h, 2.5h, 3h, etc. according to needs.

[0028] In a third aspect, the application provides an application of the full-spectrum light source to photographic lighting lamps, medical lighting lamps, educational lighting lamps, plant lighting lamps, decorative lighting lamps, traffic lighting lamps and construction lighting lamps.

[0029] In summary, the application has at least the following beneficial effects:

[0030] The full spectrum light source of the present application is full coverage in the visible light 380-780nm through the cooperation of the first waveband piece, the second waveband piece, the third waveband piece and the fourth waveband piece, and the matching of blue-green fluorescent powder, green fluorescent powder and red fluorescent powder, has good spectral continuity without obvious peaks and troughs, uniform spectral proportion without serious disorder, strong color rendering, and is close to the sunlight spectrum. Moreover, the color restoration and use effect are significantly improved, and the full spectrum light source is suitable for photographic lighting lamps, medical lighting lamps, educational lighting lamps, plant lighting lamps, decorative lighting lamps, traffic lighting lamps, construction lighting lamps and the like, and has a wide application range. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is the spectral diagram of the ultraviolet excitation full spectrum LED in the background art.

[0032] Figure 2 is the spectral diagram of the full spectrum light source of the embodiment 1 of the present application.

[0033] Figure 3 is the chromaticity diagram of the full spectrum light source of the embodiment 1 of the present application. DETAILED DESCRIPTION

[0034] In order to make the present application easier to understand, the present application will be further described in detail below in combination with embodiments, which only serve an illustrative purpose and do not limit the application scope of the present application. The raw materials or components used in the present application can be prepared by commercial channels or conventional methods if no special description is given.

[0035] EMBODIMENT

[0036] EMBODIMENT 1

[0037] A full spectrum light source comprises a light source chip and a packaging glue covering the light source chip, and the packaging glue is mixed with compounded fluorescent powder. The weight ratio of the packaging glue and the compounded fluorescent powder is 10:1.68.

[0038] The light source chip is formed by the first waveband piece, the second waveband piece, the third waveband piece and the fourth waveband piece connected in series. The light flux ratio of the first waveband piece, the second waveband piece, the third waveband piece and the fourth waveband piece is 1:4.5:26:24. The emission peak of the first waveband piece is 413nm and the half wave width is 13nm, the emission peak of the second waveband piece is 435nm and the half wave width is 18nm, the emission peak of the third waveband piece is 453nm and the half wave width is 22nm, and the emission peak of the fourth waveband piece is 470nm and the half wave width is 15nm.

[0039] The encapsulating glue is glue, specifically Japanese Shin Nippon KER-2936, which includes A glue and B glue, the viscosity of the A glue is 6990 mPa·s, the viscosity of the B glue is 4250 mPa·s, and the volume ratio of the A glue to the B glue is 1:1. The compounded phosphor is made of raw materials in the following weight percentages: 8.3% of blue-green phosphor, 8.2% of green phosphor, and 83.5% of red phosphor. The blue-green phosphor is LuAG phosphor, with an emission peak of 495 nm and a half-wave width of 35.6 nm; the green phosphor is rare earth phosphor, with an emission peak of 528.5 nm and a half-wave width of 103 nm; and the red phosphor is silicon-based nitride phosphor, with an emission peak of 655 nm and a half-wave width of 89 nm.

[0040] A method for manufacturing a full-spectrum light source, comprising the following steps:

[0041] S1, mixing the encapsulating glue and the compounded phosphor to obtain a phosphor encapsulating glue.

[0042] S2, bonding the light source chip on the bracket by die bonding. Then, the phosphor encapsulating glue is filled on the bracket and covers the light source chip. After that, curing treatment is performed at a temperature of 150℃ for 2h, and then the full-spectrum LED finished product light source is obtained by slitting.

[0043] Example 2

[0044] A full-spectrum light source, which is different from example 1 in that the raw material ratio of the compounded phosphor is different, and the compounded phosphor is made of raw materials in the following weight percentages: 9% of blue-green phosphor, 8% of green phosphor, and 83% of red phosphor.

[0045] Example 3

[0046] A full-spectrum light source, which is different from example 1 in that the raw material ratio of the compounded phosphor is different, and the compounded phosphor is made of raw materials in the following weight percentages: 8% of blue-green phosphor, 9% of green phosphor, and 83% of red phosphor.

[0047] Example 4

[0048] A full-spectrum light source, which is different from example 1 in that the raw material ratio of the compounded phosphor is different, and the compounded phosphor is made of raw materials in the following weight percentages: 5% of blue-green phosphor, 10% of green phosphor, and 85% of red phosphor.

[0049] Example 5

[0050] A full spectrum light source, which is different from example 1 in that the raw material ratio of the compounded phosphor is different, and the compounded phosphor is made of the following raw materials in weight percentage: blue-green phosphor 8%, green phosphor 5%, red phosphor 87%.

[0051] Example 6

[0052] A full spectrum light source, which is different from example 1 in that the raw material ratio of the compounded phosphor is different, and the compounded phosphor is made of the following raw materials in weight percentage: blue-green phosphor 10%, green phosphor 8%, red phosphor 82%.

[0053] Example 7

[0054] A full spectrum light source, which is different from example 1 in that the luminous flux ratio of the first waveband sheet, the second waveband sheet, the third waveband sheet, and the fourth waveband sheet is different, and the luminous flux ratio of the first waveband sheet, the second waveband sheet, the third waveband sheet, and the fourth waveband sheet is 1:4:25:25.

[0055] Example 8

[0056] A full spectrum light source, which is different from example 1 in that the luminous flux ratio of the first waveband sheet, the second waveband sheet, the third waveband sheet, and the fourth waveband sheet is different, and the luminous flux ratio of the first waveband sheet, the second waveband sheet, the third waveband sheet, and the fourth waveband sheet is 1:5:27:23.

[0057] Example 9

[0058] A full spectrum light source, which is different from example 1 in that the luminous flux ratio of the first waveband sheet, the second waveband sheet, the third waveband sheet, and the fourth waveband sheet is different, and the luminous flux ratio of the first waveband sheet, the second waveband sheet, the third waveband sheet, and the fourth waveband sheet is 1:4:28:22.

[0059] Example 10

[0060] A full spectrum light source, which is different from example 1 in that the luminous flux ratio of the first waveband sheet, the second waveband sheet, the third waveband sheet, and the fourth waveband sheet is different, and the luminous flux ratio of the first waveband sheet, the second waveband sheet, the third waveband sheet, and the fourth waveband sheet is 1:5:24:26.

[0061] Performance detection

[0062] (1) Take the full spectrum light source of example 1 as the sample, and take ANSI-F4000 as the reference light source, and detect the color parameters of the sample. The spectrum diagram of the full spectrum light source is as shown in Figure 2 , and the chromaticity diagram of the full spectrum light source is as shown inFigure 3 The color parameters of the full spectrum light source are shown in Table 1.

[0063] Table 1 Color parameters of the full spectrum light source of Example 1

[0064] Detection item Example 1 Detection item Example 1 Dominant wavelength (λd) 534.7 nm Color rendering index Ra 99.3 Peak wavelength (λp) 450.7 nm Color rendering index (CRI) 99.0 Peak bandwidth (Δλd) 261.4 nm Fidelity index Rf 98.69 Color coordinate x 0.33059 Saturation index Rg 100.23 Color coordinate y 0.34187 Color rendering index R1 100 Color coordinate u' 0.20529 Color rendering index R2 100 Color coordinate v' 0.47768 Color rendering index R3 99 Color deviation (duv) 0.0012 Color rendering index R4 100 Color temperature (Tc) 5585k Color rendering index R5 100 Color solid deviation (SDCM) 1.37 Color rendering index R6 99 Color purity (Purity) 0.019 Color rendering index R7 99 Color ratio R 17.79％ Color rendering index R8 99 Color ratio G 76.00％ Color rendering index R9 98 Color ratio B 6.21％ Color rendering index R10 98 / / Color rendering index R11 100 / / Color rendering index R12 98 / / Color rendering index R13 99 / / Color rendering index R14 99 / / Color rendering index R15 98

[0065] Comparing with Figure 1 and Figure 2 , Figure 3 , the full spectrum light source of the present application has a significantly reduced blue-violet light spectral peak, a relatively uniform spectral proportion, full coverage of visible light 380-780 nm, good spectral continuity, no obvious peaks and troughs, and is close to the solar spectrum. In combination with Table 1, the full spectrum light source of the present application has Ra of 99.3, R1-R15≥90, Rf of 98.69, Rg of 100.23, Rf / Rg of 0.98, and Rf / Rg close to 1, and good color reproduction.

[0066] (2) The full spectrum light sources of Examples 1-10 were taken as samples, respectively, and ANSI-F4000 was taken as a reference light source, and the color parameters of the samples were detected, and the detection results are shown in Table 2.

[0067] Table 2 Detection results

[0068]

[0069] As can be seen from Table 2, the full spectrum light source of the present application has Ra>97, R1-R15≥96, Rf>98, Rg>100, and Rf / Rg is 0.97-0.98. Especially for Examples 1-3 and Examples 7-8, the full spectrum light source has R1-R15≥98, and the color rendering index has obvious advantages, significantly improving the color reproduction and use effect.

[0070] It should be noted that the above-described examples are only used to explain the present application and do not constitute any limitation on the present application. The present application has been described by referring to typical examples, but it should be understood that the words used therein are descriptive and explanatory words, rather than limiting words. The present application can be modified within the scope of the claims, and the present application can be revised within the scope and spirit of the present application. Although the present application described therein relates to specific methods, materials and examples, it does not mean that the present application is limited to the specific examples disclosed therein, on the contrary, the present application can be extended to all other methods and applications with the same function.

Claims

1. A full spectrum light source characterized by: The light source chip and the encapsulation glue covering the light source chip, wherein the encapsulation glue is mixed with the compounded fluorescent powder; The light source chip is a first waveband piece with a peak emission of 410-420 nm, a second waveband piece with a peak emission of 430-440 nm, a third waveband piece with a peak emission of 445-460 nm, and a fourth waveband piece with a peak emission of 465-475 nm; the half wave width of the first waveband piece is 10-20 nm, the half wave width of the second waveband piece is 15-25 nm, the half wave width of the third waveband piece is 15-25 nm, and the half wave width of the fourth waveband piece is 10-20 nm; the light flux ratio of the first waveband piece, the second waveband piece, the third waveband piece and the fourth waveband piece is 1:(4-5):(25-27):(23-25); The compounded fluorescent powder is blue-green fluorescent powder with a peak emission of 490-500 nm, green fluorescent powder with a peak emission of 525-535 nm, and red fluorescent powder with a peak emission of 650-660 nm; the half wave width of the blue-green fluorescent powder is 30-40 nm, the half wave width of the green fluorescent powder is 100-110 nm, and the half wave width of the red fluorescent powder is 85-105 nm; the compounded fluorescent powder is made of the following raw materials by weight percentage: 8-9% of blue-green fluorescent powder, 8-9% of green fluorescent powder, and 83-84% of red fluorescent powder.

2. A full spectrum light source as claimed in claim 1, characterized in that: The blue-green fluorescent powder is LuAG fluorescent powder, the green fluorescent powder is rare earth fluorescent powder, and the red fluorescent powder is silicon-based nitride fluorescent powder.

3. A full spectrum light source as claimed in claim 1, characterized in that: The weight ratio of the encapsulation glue and the compounded fluorescent powder is 10:(0.5-3).

4. A full spectrum light source as claimed in claim 1, characterized in that: The first waveband piece, the second waveband piece, the third waveband piece and the fourth waveband piece are connected in series or in parallel.

5. A method of manufacturing a full spectrum light source as claimed in any of claims 1-4, characterized in that: The method comprises the following steps: S1, mixing the encapsulation glue and the compounded fluorescent powder to obtain fluorescent encapsulation glue; S2, bonding the light source chip on the support, then pouring the fluorescent encapsulation glue on the support and covering the light source chip, and then curing, cutting to obtain a full-spectrum LED finished light source.

6. Application of the full-spectrum light source of any one of claims 1-4 to photographic lighting lamps, medical lighting lamps, educational lighting lamps, plant lighting lamps, decorative lighting lamps, traffic lighting lamps, and construction lighting lamps.

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