Method for correcting light mixing deviation of multi-chip LED to achieve accurate light distribution of any color

The invention discloses a method for correcting light mixing deviation of a multi-chip LED to achieve accurate light distribution of any color. The method is characterized in that a color coordinate is used as a standard to represent the color of a light source, the color is obtained through multi-chip LED mixing, according to the Grassmann color mixing principle, the optical reference of each color under the target color coordinate is obtained, and the luminous flux is used as a correction parameter. The RGB-LED is taken as an example, light mixing is carried out on light fluxes of R-LED, G-LED and B-LED chips under different input currents, then color coordinates obtained through light mixing serve as target color coordinates, and the theoretical light fluxes (serving as light fluxes after light mixing) of the required RGB three-primary-color chips are calculated through a theoretical light distribution formula. The light mixing deviation of a single LED chip when the three-primary-color chips are mutually