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Full-spectrum LED fluorescent powder composition and full-spectrum white-light LED device

A composition and phosphor technology, applied in semiconductor devices, electrical components, luminescent materials, etc., can solve the problems of high proportion of blue light, lack of light, weak luminescence, etc., and achieve the effect of reducing the proportion, uniform distribution, and eliminating the peak of blue light

Inactive Publication Date: 2021-04-06
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At the same time, the technology of blue light LED plus full-spectrum phosphor powder has also been researched in the market. Comparative literature CN201410466575.2 studies the technology of blue light chip plus full-spectrum phosphor powder, which can achieve an average CRI of 90 at a color temperature of 5000K, but this technology has been obtained In the luminescence spectrum of the product, there is a sharp blue light peak in the blue light part, the proportion of blue light is high, and the luminescence is weak in the range of 450nm-500nm, showing the phenomenon of lack of light

Method used

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  • Full-spectrum LED fluorescent powder composition and full-spectrum white-light LED device
  • Full-spectrum LED fluorescent powder composition and full-spectrum white-light LED device

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preparation example Construction

[0057] The present invention also provides a method for preparing the above-mentioned LED lamp bead, which specifically includes the following steps:

[0058] Select chip, encapsulant and phosphor;

[0059] After the bracket is cleaned, the bracket is preheated, and then glue compounding, vacuuming, dispensing, hardening, LED lamp bead forming, lamp bead testing, lamp bead sorting and packaging are carried out in sequence.

[0060] see Figure 4 , Figure 4 It is a process flow chart of the preparation method of LED lamp beads.

[0061] In the present invention, the encapsulation glue is selected from silicone rubber or epoxy resin.

[0062] The step of compounding the glue can mix the three kinds of phosphors with the encapsulation glue respectively, and then dispense the glue in turn to form phosphor layers of different colors; or mix the three kinds of phosphors and then mix with the encapsulation glue before dispensing.

[0063] In the present invention, by adjusting t...

Embodiment 1

[0066] Choose a chip with a power of 0.2W, a peak wavelength of 400nm, and a size of 1734 as the first chip, and a chip with a power of 0.2W, a peak wavelength of 450nm, and a size of 0820 as the second chip. The rated luminous flux of the second chip is 5.00lm and 1.25lm respectively, and the blue phosphor Na 3 sc 2 (PO 4 ) 3 :Eu 2+ Accounting for 30% of the total phosphor, the green phosphor Lu 3 Al 5 o 12 : Ce 3+ Accounting for 50% of the total phosphor, red phosphor CaAlSiN 3 :Eu 2+ It accounts for 20% of the total phosphor powder. The ratio of phosphor powder to Dow Corning 6063 silicone rubber is 1.5:1, and the total amount of the mixture of phosphor powder and glue used on each LED device is 0.01 g.

[0067] The optoelectronic performance of the packaged samples was tested using Yuanfang Photochromatic Electricity Comprehensive Test System (PCE-2000A). After testing, the color temperature of the LED device was 2709K, the color rendering index was 98.5, the rat...

Embodiment 2

[0073] Choose a chip with a power of 0.2W, a peak wavelength of 400nm, and a size of 1734 as the first chip, and a chip with a power of 0.2W, a peak wavelength of 450nm, and a size of 0820 as the second chip. The rated luminous flux of the second chip is 4.50lm and 1.50lm respectively, and the phosphor Na 3 sc 2 (PO 4 ) 3 :Eu 2+ Accounting for 16% of the total phosphor, the blue phosphor Sr 4 Al 14 o 25 :Eu 2+ Accounting for 7% of the total phosphor, the blue phosphor Sr 5 (PO 4 ) 3 Cl:Eu 2 + Accounting for 7% of the total phosphor, the green phosphor Lu 3 (Al,Ga) 5 o 12 : Ce 3+ Accounting for 5% of the total phosphor, the green phosphor Lu 3 Al 5 o 12 : Ce 3+ Accounting for 45% of the total phosphor, the red phosphor Sr 2 Si 5 N 8 :Eu 2+ The proportion of the total phosphor is 5.5%, and the red phosphor CaAlSiN 3 :Eu 2+ It accounts for 14.5% of the total phosphor powder. The ratio of phosphor powder and glue is selected as 1.5:1, and the total amount...

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Abstract

The invention provides a full-spectrum fluorescent powder composition, which comprises blue fluorescent powder, green fluorescent powder and red fluorescent powder in a mass ratio of (2.5-3):(4.5-6):(1-2), wherein the light-emitting peak value of the blue fluorescent powder is in a range of 420-520 nm, the light-emitting peak value of the green fluorescent powder is in a range of 521-550 nm, and the light-emitting peak value of the red fluorescent powder is in a range of 610-660 nm. According to the invention, by adjusting the dosage proportions of three types of fluorescent powder, the height ratio of the blue light part in the light-emitting spectrum of the fluorescent powder composition is less than 1, the integral proportion of the blue light area is less than 5%, and the difference between the strongest spectral proportion and the weakest spectral proportion in a 460-490 nm range is less than 0.2; and through modulation of the fluorescent powder, a sharp blue light peak value can be eliminated while the proportion of blue light components is effectively reduced, light emission in the range of 450-500 nm is high, and the overall spectrum is uniformly distributed.

Description

technical field [0001] The invention belongs to the technical field of LEDs, and in particular relates to a full-spectrum LED fluorescent powder composition and a full-spectrum white LED device. Background technique [0002] With the advancement of science and technology and the process of industrialization, LED has become a new generation of lighting technology. It has the advantages of energy saving, high luminous efficiency, precise light distribution, stability and reliability, long service life, and high cost performance. It is rapidly promoted and used around the world, such as in cities. Road lighting, airports, docks, urban lighting projects, tourist attractions and other places use LED lighting fixtures in large quantities. Compared with traditional high-pressure sodium lamps, using LED lights can save energy by more than 60%, and the overall brightness is higher than high-pressure sodium lamps. [0003] However, with the widespread application of LEDs, people have ...

Claims

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Application Information

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IPC IPC(8): C09K11/81C09K11/64C09K11/80C09K11/59H01L33/50
CPCC09K11/0883C09K11/7734C09K11/7739C09K11/7774C09K11/7795H01L33/502Y02B20/00
Inventor 李成宇王森庞然张洪杰
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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