White-light LED design method and lamp with high light color quality

Abstract

The invention discloses a white-light LED design method and a white-light LED lamp with high light color quality. According to the method, by simulating a sunlight spectrum and selecting 6-9 kinds of LED chips with different colors to constitute an LED module, and optimizing a composition proportion of each LED monochromatic light via a constraint equation set, white light with a color temperature of 2000K-8500K can be continuously output, wherein a color quality scale (CQS) is more than 96, and a Duv is less than 0.01. The constraint equation set provided by the invention comprises constraint consisting of chroma and spectrum, color quality of a white light source is improved by optimizing a distance Duv between a color coordinate point to a blackbody curve and the CQS, and a spectrum composition that is closer to sunlight and healthier for human bodies is obtained by the constraint of a physiological cycle influence factor and a blue light damage threshold of the sunlight spectrum on the spectrum. According to the method and the lamp provided by the invention, optimization on the chroma and the spectrum of the white-light LED is achieved, the LED white-light output with high light color quality is achieved, and a new path is provided for achieving high-quality healthy illumination.

Description

technical field [0001] The invention belongs to the technical field of semiconductor lighting, and in particular relates to a design method of a white LED with high light and color quality and a lamp. Background technique [0002] As the luminous efficiency of white LEDs continues to increase and their applications become more and more extensive, people pay more and more attention to the quality of light. Especially for indoor lighting, the requirements for light quality are far greater than those for light efficiency. Lighting is influenced by factors such as people's traditions, habits, psychological expectations, and emotions. The research on lighting in Europe, America and Japan is greatly influenced by traditional sunlight. The goal of the DOE plan in the United States is to achieve full-sunlight-like lighting by 2025. Since then, the human sensory system has adapted to the changing laws of sunlight, so the human eye feels the most comfortable when reading and observing...

AI Technical Summary

Problems solved by technology

[0006] In the design process of white LED lamps with high light and color quality, not only the LED light source is required to have excellent color rendering quality and meet people’s preference for the illuminated object, but also the LED light source is required to meet people’s long-term adaptation to natural light and reduce the spectrum. The harm of blue light to the human body is a problem in the current design of white light LEDs with high light and color quality, and there is a lack of a comprehensive optimization design method from light color quality to spectrum

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