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A kind of LED light source and lamps with partial spectral structure of sunlight and visible light

A technology of LED light source and visible light, applied in the field of electronic information, can solve the problems of large damage to human eyes, increased energy consumption and greenhouse effect, etc.

Active Publication Date: 2021-05-18
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, through the analysis of the spectral components of the sun in natural light, we show that the relatively large content of sunlight is 480-560nm spectral components, while the lack of relatively large spectral components in current LED lighting sources is that the trough is 490nm and the wavelength range is 480nm. Cyan light at -530nm
In addition, because the energy of ultraviolet photons is higher, ultraviolet rays are more harmful to human eyes (typically, the proportion of blind people in plateau areas is higher than that in plain areas); and infrared rays do not respond to the visual function of the human eye, so the infrared rays in the lighting source not only do not work but instead Increased energy consumption and greenhouse effect
Furthermore, the solar spectrum originally contains certain ultraviolet spectral components, so there is no need to add ultraviolet components to the lighting source.

Method used

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  • A kind of LED light source and lamps with partial spectral structure of sunlight and visible light
  • A kind of LED light source and lamps with partial spectral structure of sunlight and visible light
  • A kind of LED light source and lamps with partial spectral structure of sunlight and visible light

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Experimental program
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Effect test

Embodiment

[0037] Embodiment (1)——two-color technical scheme and its deficiency

[0038] The 3528 LED chip semi-finished product (peak emission wavelength is 455nm) produced by Guangzhou Jinko Electronics Co., Ltd. after solid crystal and wire bonding, and the Y produced by Guangdong Langda Fluorescent Materials Co., Ltd. 3 al 5 o 15 : Ce (YAG: Ce) yellow phosphor, AB transparent silica gel produced by Jiangxi Lutai Technology Co., Ltd. for white LED device packaging. After uniformly mixing YAG:Ce phosphor in transparent silica gel and degassing, use a dispenser to drop it onto the LED chip holder, and package a white LED device after vacuum baking, wherein YAG:Ce phosphor is in transparent silica gel The mass percentage is 13%. The HAAS2000 photoelectric test equipment produced by Hangzhou Yuanfang Optoelectronics Information Co., Ltd. was used to test the optical and electrical performance tests of LED devices. On May 26, 2017, the solar spectrum was collected at different times th...

Embodiment ( 5

[0053] The LED encapsulation process used in this embodiment is the same as that in Embodiment (4), but an ultraviolet LED chip with an emission wavelength of 365 is used. The blue fluorescent powder Sr that present embodiment adopts 3 MgSi 2 o 8 : Eu(3128) was synthesized by the laboratory itself, the synthesis method is as described in the literature Journal of Luminescence, 2016, 169, 733, and other phosphors are the same as the above examples. In this embodiment, a five-element color scheme is adopted to seal white LED devices, using 3128 blue phosphor + Ba505 cyan phosphor + 557 green phosphor + 315 orange phosphor + 1113 red phosphor, the mass of phosphor in transparent silica gel The percentage is 20%, and the mass ratio of phosphor is 3128:Ba505:557:315:1113=0.1836:0.4350:0.2010:0.1273:0.0531. The emission spectrum of the packaged white LED device is as follows Figure 14 As shown, its spectral configuration is basically consistent with the solar spectrum.

Embodiment ( 6

[0055] An LED lamp, which uses the LED device in the embodiment (three) or the embodiment (four).

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Abstract

The invention discloses an LED device and a light source with a partial spectral structure of sunlight and visible light. The LED device includes a blue LED chip or a blue fluorescent powder, and further uses cyan fluorescent powder, green fluorescent powder, orange fluorescent powder and red fluorescent powder, The cyan, red, green and orange spectral components are mixed into the emission spectrum of the LED device to obtain white light. Compared with the prior art, the present invention has the following advantages: it has a solar light emission spectrum configuration, does not contain ultraviolet and infrared spectral components, and is a healthy light source; it adopts a four-element or five-element color technical scheme to package white LED devices, which is different from traditional The three-primary-color concept and the two-color technology scheme used in early LED packaging emphasize the need to add the most important cyan light spectrum component in the solar spectrum with a wavelength range of 480-520nm; it not only meets the needs of environmental protection, green energy and energy saving, but also meets the requirements of human health. .

Description

technical field [0001] The invention belongs to the field of electronic information, specifically semiconductor optoelectronic devices, green lighting and information display, and particularly relates to a packaging method for a white LED device with a configuration for emitting sunlight in the visible light range and a healthy light source made using the device. Background technique [0002] White light LED is known as the fourth generation of green semiconductor lighting source after incandescent lamps, fluorescent lamps and high-pressure gas discharge lamps. It is friendly to the environment (no mercury pollution), and has the advantages of small size and shock resistance. Therefore, once the LED came out, it has been popularized and applied rapidly, and the penetration rate in the field of display backlight has reached 100%. Although semiconductor lighting has the obvious advantages of energy saving and environmental protection, how to endow LED green lighting with heal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/50H01L25/075
Inventor 陈雷费米陈杰何良锐田云飞刘衍芳张强
Owner HEFEI UNIV OF TECH
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