A kind of preparation method of white light led healthy light source

Abstract

The invention discloses the manufacturing method of a white light LED health light source. The method comprises the following steps of fixing a blue chip on a support containing a circuit, coating a composite packaging layer on the surface of a blue chip, and coating a diffusion layer on the surface of the composite packaging layer, wherein the composite packaging layer contains a red fluorescentpowder, a green fluorescent powder and a rare earth Nd<3+> compound, the red fluorescent powder and the green fluorescent powder are proportioned according to a color temperature requirement of 2200Kto 7000K; through the color filter effect of a neodymium ion, absorbing part of yellow light with a wave length range of 570nm to 590nm in visible light; and then, through the multiple times of diffuse reflection and refraction of the diffusion layer, realizing highlight quality white light with uniform luminescence and soft light. A new approach is provided for realizing the health light source.In the invention, the specific and expensive LED light source or the fluorescent powder is not needed, general applicability is high, the dosage of the fluorescent powder is less, LED light source quality is increased, and simultaneously high quality white light LED manufacturing cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of LEDs, in particular to a preparation method of a white LED healthy light source. Background technique [0002] As a new generation of lighting sources, LED lighting has many advantages, but also has defects, which cannot meet the needs of human health lighting. With the gradual improvement of the understanding of photobiological effects, LED lighting technology is gradually shifting from the pursuit of light efficiency to the pursuit of light quality. Since the restoration of the color of the scene also involves human physiological and psychological optical effects, such as comfort, satisfaction, pleasure, artistry, aesthetics, etc., that is, it involves physiological and mental health issues, therefore, LED lighting also needs to meet color saturation. , Restore color authenticity and healthy lighting concept, in order to be accepted and used by the public faster. [0003] In 2007, CIE made it clear th...

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Problems solved by technology

[0003] In 2007, CIE made it clear that CRI cannot accurately represent the color rendering performance of LED light sources. There is no inherent connection between CRI and human visual effects. is 100, and LED is not a continuous spectrum illuminant, and there are various combinations of monochromatic light with high color saturation, which increases the complexity of the problem

[0004] In order to make up for the lack of red light, by using red light chips to compensate for red light or adding red phosphors, using 6-9 different color LED chips to form LED modules, and combining different blue light chips to excite phosphors with different emission peak wavelengths etc. The research on dimming and toning has been the focus of research by researchers at home and abroad in recent years, but most of the research only focuses on how to improve the color rendering index, but does not comprehensively optimize the spectrum and light quality.

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