Light mixing method based on three-primary-color LEDs

Abstract

The invention discloses a light mixing method based on three-primary-color LEDs. The light mixing method comprises the following steps: acquiring spectral power distribution of single-color light by using a spectrograph, and calculating tristimulus values corresponding to the single-color light; and testing through the spectrograph to obtain photometry and colorimetry performance parameters and the like of RGB three-primary-color LEDs. Red light, green light and blue light are mixed, the light is adjusted by a PWM mode. By the established three-primary-color light mixing mathematic model, the ratio of the theoretical three primary colors is obtained. Due to influence of junction temperature, chromaticity coordinate and color temperature of synthesized white light can deviate, and the relation between the chromaticity coordinate of the synthesized light and duty ratio of the three primary colors is found out by respectively adjusting duty ratios of bulbs R, G and B in the synthesized white light. The light mixing method based on three-primary-color LEDs has the characteristics of wide adjustable color temperature range and simple mathematic model. Light quality of illumination of white light LEDs can be improved, so that a light environment can be comfortable, healthful and intelligently adjustable, and demands of people to light are met.

Description

technical field [0001] The invention relates to an LED light mixing method, in particular to a light mixing method based on three primary color LEDs. Background technique [0002] In recent years, LED lights have gradually replaced traditional lighting sources as a new type of lighting source. LED light sources have many advantages such as small size, wide color gamut, energy saving, long life, and strong controllability. It is used in some commercial lighting fields, but the quality of smart lights on the market is uneven, and the color drift caused by LED heating, how to improve the light quality of smart lights, especially white lighting, to make the lighting environment more comfortable, healthy, and Intelligent and adjustable to meet people's needs for lighting, it has become a research hotspot. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a light mixing method based on three primary color LEDs, which ha...

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Problems solved by technology

[0002] In recent years, LED lights have gradually replaced traditional lighting sources as a new type of lighting source. LED light sources have many advantages such as small size, wide color gamut, energy saving, long life, and strong controllability. It is used in some commercial lighting fields, but the quality of smart lights on the market is uneven, and the color drift caused by LED heating, how to improve the light quality of smart lights, especially white lighting, to make the lighting environment more comfortable, healthy, and Intelligent and adjustable, meeting people's needs for lighting, has become a research hotspot

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