A kind of imitation natural light LED lighting device and preparation method thereof

Abstract

The invention relates to a natural light-simulation LED health lighting device and a fabrication method thereof. The LED health lighting device is formed by assembling light-emitting ceramic and an LED composite chip by a right installation or inverse installation mode, wherein the light-emitting ceramic comprises a ceramic substrate and a light-emitting coating layer, the raw material of the light-emitting coating layer comprises LED fluorescent powder, glaze, a grinding medium and a binding agent, and the thickness of the light-emitting coating layer is 0.02-0.1 millimeter. By power and spectrum matching of the LED composite chip, the light-emitting ceramic can be simulated, and the light color of the lightning device can be modulated. Compared with the prior art, the blue light spectrumgenerated by the LED lighting device is reduced; the spectrum is balanced and continuous and is more closer to visible natural spectrum; and the light-emitting ceramic has favorable heat conductivityand light scattering performance, the LED health lighting device can be used for large-power lighting and has the advantages of energy saving, environmental-friendliness and the like, and a glare effect is reduced.

Description

technical field [0001] The invention relates to the field of LED lighting, in particular to an LED lighting device imitating natural light and a preparation method thereof. Background technique [0002] Scientific research has found that light is one of the main driving forces of the human body's circadian rhythm system. Whether it is natural sunlight or artificial light sources, it will trigger a series of circadian rhythm responses. Light affects human health to varying degrees through visual and non-visual effects. Therefore, it is of great practical significance to advocate "healthy lighting" and improve light quality and comfort. The so-called healthy lighting is to improve and improve the conditions and quality of people's work, study and life through lighting, and promote mental and physical health. The solar spectrum is the healthiest spectrum. The solar spectrum mainly includes ultraviolet, visible and infrared spectrum. Ultraviolet light has the function of ster...

AI Technical Summary

Problems solved by technology

The spectral range of white light LED is relatively narrow, especially the energy in the short-wave blue light region is relatively concentrated, which is quite different from the actual spectrum of the sun, and there is also an obvious glare effect, which makes LED lighting sources have adverse effects on the human body for long-term exposure

The existing dispensing packaging process also has the risk of light attenuation; and because of its poor heat dissipation, it cannot meet the requirements of high-power lighting

Chinese patent CN104263359A discloses a full-spectrum fluorescent powder and its application, which is composed of the following components in the following weight percentages: blue-green fluorescent powder with emission peak at 490nm-505nm under excitation by blue light: 20%-45%; Green phosphor powder with emission peak at 520nm-540nm under excitation: 20%-40%; yellow phosphor powder with emission peak at 550nm-575nm under excitation with blue light: 25%-40%; emission peak at 615nm-640nm under excitation with blue light Red light phosphor: 3%-15%; In this patented technology, the LED phosphor is directly coated on the blue chip to make a high color rendering white LED light. The intensity of the light spectrum emitted by the LED light at a wavelength of 600nm is 1.0a.u. It drops sharply in the wavelength range of 600-650nm, while the solar spectrum has an intensity of about 0.8a.u. in the wavelength range of 600-650nm, and it decreases uniformly and slowly in the wavelength range of 600-650nm. Spectrum is still quite different

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