Fluorescent powder composition for reducing blue light harm and light-emitting device

A light-emitting device and blue light hazard technology, applied in the field of lighting, can solve the problem of high blue light components, achieve the effect of reducing blue light hazards and protecting eyesight

Pending Publication Date: 2021-05-04
HEBEI LIFU CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a fluorescent powder composition and a light-emitting device that reduce the hazards of blue light, especially suitable for general lighting with a correlated color temperature of 3500K-5500K in classrooms, libraries and other fields (reference GB / T 36876-2018), to Solve the problem that the harmful blue light components are generally high under the same correlated color temperature of the lighting devices used in the prior art

Method used

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  • Fluorescent powder composition for reducing blue light harm and light-emitting device
  • Fluorescent powder composition for reducing blue light harm and light-emitting device
  • Fluorescent powder composition for reducing blue light harm and light-emitting device

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Embodiment 1-51

[0037] A 3500K-4500K light-emitting device for reducing the harm of blue light, which includes a blue light chip with a peak wavelength of 440-465nm and a phosphor composition. The phosphor composition comprises the following phosphor components: component one, Sr with a peak emission wavelength of 490-510nm 1-x-y Ca x Ba y (Si 1-z Al z ) 2 N 2 o 2 : Eu (0≤x, y, z≤1) accounts for 30%-60% of the total mass of the phosphor composition; component two, the luminous peak wavelength is 520-560nm (Y 1-x-yLu x Gd y ) 3 (Al 1-z Ga z ) 5 o 12 : Ce (0≤x, y, z≤1); component three, Sr with luminous peak wavelength of 620-660nm 1-x Ca x AlSiN 3 : Eu (0≤x≤1), wherein the mass ratio of component one to component three is 3-7.5 (the composition and effect of the phosphor composition in the specific embodiment are shown in Table 2, Table 3 and Table 4). The resulting light-emitting device that reduces the hazard of blue light shows that the Ra is above 80, which is comparable t...

Embodiment 52-87

[0061] 5000K-5500K device for reducing blue light hazards, including a blue light chip with a peak wavelength of 440-465nm and a phosphor composition. The phosphor composition comprises the following phosphor components: component one, Sr with a peak emission wavelength of 490-510nm 1-x-y Ca x Ba y (Si 1-z al z ) 2 N 2 o 2 : Eu (0≤x, y, z≤1) accounts for 65%-85% of the total mass of the phosphor composition; component two, the luminous peak wavelength is 520-560nm (Y 1-x-y Lu x Gd y ) 3 (Al 1-z Ga z ) 5 o 12 : Ce (0≤x, y, z≤1); component three, Sr with luminous peak wavelength of 620-660nm 1-x Ca x AlSiN 3 : Eu (0≤x≤1), the content ratio of component one to component three is more than 5 and less than 10 (the composition and effect of the phosphor composition in the specific embodiment are shown in Table 5 and Table 6). The resulting light-emitting device that reduces the hazard of blue light shows that the Ra is above 80, compared with the emission spectrum o...

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Abstract

The invention discloses a fluorescent powder composition capable of reducing blue light harm and a light-emitting device. The light-emitting device is composed of a blue light chip and the fluorescent powder composition. The fluorescent powder composition comprises a component I, a component II and a component III, wherein the component I has a light-emitting peak wavelength in a range of 490-510 nm, comprises at least one of Sr, Ca and Ba and at least one of Si and Al, and is Eu-activated nitrogen oxide fluorescent powder; the component II is aluminate fluorescent powder which has a light-emitting peak wavelength in a range of 520-560 nm and is activated by Ce; and the component III is nitride fluorescent powder which has a light-emitting peak wavelength in a range of 620-660 nm, comprises at least one of Sr and Ca and at least one of Al and Si and is activated by Eu. According to the invention, the blue light component is effectively reduced, and the LED lamp is especially suitable for general illumination with the correlated color temperature of 3500K-5500K in the fields of classrooms, libraries and the like.

Description

technical field [0001] The invention relates to the field of lighting technology, in particular to a fluorescent powder composition and a light-emitting device that reduce blue light hazards. Background technique [0002] Blue light is a general term for light with a wavelength in the range of 400-500nm. Its energy is higher than that of red light and green light. It can directly penetrate the cornea and crystal to reach the retina, accelerate the oxidation process of the macular area of ​​the eye, and also affect the cornea and tear film. Or indirectly lead to dry eyes, which is also known as "blue light damage" phenomenon. [0003] At the 2010 Annual Meeting of the International Optical Society, the world's top optical experts unanimously pointed out that short-wave blue light has extremely high energy and can penetrate the lens and reach the retina. Blue light irradiating the retina will produce free radicals, and these free radicals will lead to the death of retinal pig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64C09K11/80H01L33/50
CPCC09K11/7734C09K11/7774C09K11/0883H01L33/504
Inventor 杨志平赵金鑫王大伟刘学千李璇璇王新乐
Owner HEBEI LIFU CHEM TECH
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