LED light source capable of weakening blue light harm and manufacturing method thereof

A technology of LED light source and blue light chip, which is applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of phosphor performance degradation, human eye retinal damage, high color temperature, etc., to improve the stability of light emission, reduce the overflow of blue light, reduce The effect of color shift

Active Publication Date: 2020-06-23
深圳市鸿威星光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the mature and commercialized blue LED chip is combined with yellow phosphor powder, but this method makes the content of blue light in LED light relatively high. Penetrating light, it is harmful to the eyes and skin, especially when working and living in this visual environment for a long time, the retina of the human eye may be irreversibly damaged, that is, "blue light hazard". The content is relatively high, the color rendering index is also low, and the color temperature is high, and the obtained is a cool white light.
[0004] On the other hand, this method is mainly prepared by coating a GaN-based chip with yellow phosphor powder. The phosphor powder is coated on the blue-ray chip with silica gel resin or epoxy resin containing phosphor powder by dispensing. The preparation is relatively simple. , but the consistency of the light is poor, and because the resin is close to the chip, the heat is easy to accumulate, resulting in the aging of the packaging material and the deterioration of the phosphor performance, affecting the light color parameters and service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] SiO 2 , B 2 o 3 , ZnO, BaO, Na 2 O is a glass matrix material, the molar ratio is 1:2.2:0.7:0.8:0.3, the mass percentage of the cerium-activated yttrium aluminum garnet phosphor and the glass matrix material is 5%; the borosilicate glass is doped with diamond micropowder , the mass percent example of diamond micropowder and glass matrix material is 5%, and the particle diameter of diamond micropowder is 18-36 μ m, and preparation method is as follows:

[0038] with H 3 BO 3 , SiO 2 , ZnO, BaO, Na 2 CO 3 As raw materials, accurately weigh the required mass of each raw material according to the designed glass composition, accurate to ±0.0005g, fully mix and grind until uniform, put it in a high-temperature furnace for high-temperature melting after completion, and keep it warm for 0.5- Exhaust for 1 hour, then heat up to completely melt, keep warm for 1-2 hours until the raw material is completely melted and clarified, take out the molten material at high temperat...

Embodiment 2

[0040] Prepared with Eu 3+ and Bi 3+ The doped strontium molybdate fluorescent material is a red fluorescent material excited by blue light, and its composition is Sr 1-x-y MoO 4 :xEu 3+ ,yBi 3+ , where x and y satisfy 0.1≤x≤0.22, 0.05≤y≤0.1, and its preparation method is as follows:

[0041] SrCO 3 、H 2 MoO 4 、Eu 2 o 3 、 Bi 2 o 3 As the raw material, accurately weigh the required mass of each raw material according to the stoichiometric ratio, accurate to ±0.0005g, and add 20% of the total mass of the raw material in H 3 BO 3 , 40% LiCl, add anhydrous ethanol to fully mix and grind until uniform, move to a crucible, sinter in a high-temperature furnace, the sintering temperature is 560-600 ° C, after cooling to room temperature, the product is fully washed with anhydrous ethanol, then dried and ground The red fluorescent powder is prepared, and the red fluorescent powder is coated on the glass substrate by screen printing, the coating thickness is 0.03-0.05mm, an...

Embodiment 3

[0044] An LED light source that weakens the harm of blue light, including a blue light chip and a glass light-converting light-emitting component, the glass light-converting light-emitting component is made of borosilicate glass uniformly dispersed with cerium-activated yttrium aluminum garnet phosphor powder prepared in Example 1 and one side is coated with The glass substrate covered with red fluorescent powder consists of borosilicate glass with a thickness of 0.8 mm and a glass substrate with a thickness of 0.4 mm. The red fluorescent powder is the red fluorescent powder prepared in Example 2, and the glass substrate is coated with red fluorescent powder. One side of the powder is closely attached to the borosilicate glass; the other side of the glass substrate opposite to the phosphor powder surface is sequentially coated with a layer of titanium oxide and indium oxide as an anti-blue light layer, and the film thickness is 100-120nm; the blue light chip The LED light sourc...

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Abstract

The invention provides an LED light source capable of weakening blue light harm. The LED light source comprises a blue light chip and a glass light-conversion light-emitting assembly. The glass light-conversion light-emitting assembly is composed of borosilicate glass uniformly dispersed with cerium-activated yttrium aluminum garnet fluorescent powder and a glass substrate with one surface coatedwith red fluorescent powder. The red fluorescent powder is red fluorescent powder excited by blue light; one surface of the glass substrate, which is coated with the red fluorescent powder, is clung to the borosilicate glass; the glass light-conversion light-emitting assembly is arranged, the fluorescent powder is uniformly dispersed in borosilicate glass, and the consistency of LED light source and the luminous stability of phosphor are improved; and meanwhile, the blue chip further excites red fluorescent powder, overflow of blue light of the lamp is reduced, red light is increased, color temperature is reduced, and the problems of aging, color drift and blue light overflow of a resin packaged LED in the prior art can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of LED light sources, in particular to an LED light source that weakens the harm of blue light and a manufacturing method thereof. Background technique [0002] As the fourth-generation lighting source after incandescent lamps, fluorescent lamps and high-pressure gas discharge lamps, white LED (Light Emitting Diode) has many advantages such as non-toxic, high efficiency and energy saving, long life, shock resistance and good safety, etc. It is an environmentally friendly, Energy-saving green lighting source, known as the most valuable new light source in the 21st century, has great application prospects in the field of lighting and display. [0003] At present, the most important way to achieve white LED lighting is to use ultraviolet light, near ultraviolet light or blue light LED chips to add phosphor powder, and the light emitted by the chip and phosphor powder is mixed or the chip excites three primary c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/48H01L33/50H01L33/56
CPCH01L33/48H01L33/502H01L33/56
Inventor 陈杰孟子胤
Owner 深圳市鸿威星光电有限公司
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