Method for achieving light distribution in full color gamut scope based on PWM four primary color LEDs

Abstract

The invention discloses a method for achieving light distribution in a full color gamut scope based on PWM four primary color LEDs. The method comprises the following steps of (1) obtaining the photometric and colorimetric performance parameters of each single color; (2) calculating the corresponding tristimulus values of each single color; (3) according to that the luminous flux and the duty ratio is in proportional relationship, deriving the function relationship between the luminous flux and the duty ratio; (4) obtaining the mathematical model of the three primary color light mixing and the proportion of each single color light in the mixed light, and obtaining the color mixture equation set; (5) determining the target color coordinates and color temperature of the mixed light; (6) deriving the function relationship among the chromaticity coordinates, the luminous flux and the duty ratio; and (7) determining the luminous flux of the target color temperature, calculating each duty ration of RGBW, and finally performing outputting, so as to achieve the light distribution object. The method is featured in that the product cost is low, the adjustable color temperature precision is high, the mode is simple, the illumination is comfortable, the usage effect is good, and the like.

Description

technical field [0001] The invention relates to LED light mixing technology, in particular to a method for realizing full color gamut light distribution based on PWM four-primary color LEDs. Background technique [0002] With the gradual development of LED lighting, LED lights have been widely used in my country's indoor and outdoor lighting and other fields, and have replaced traditional lighting equipment such as incandescent lamps and fluorescent lamps, becoming representatives of energy-saving, environmental protection, and intelligent lighting. Among them, the development advantages of intelligent lighting are very obvious. Coupled with the inherent characteristics of LEDs, the light emitted can be better converged, making LED smart lights an important application in the field of LED lighting, widely used in supermarkets, households , office, landscape and other occasions, the market development prospects are considerable. [0003] At present, the dimming and color mat...

AI Technical Summary

Problems solved by technology

[0003] At present, the dimming and color matching of smart lights on the market mainly use RGB three-color light distribution. Although it can meet the needs of users for scene lighting, the smart lights that use RGB color matching have shortcomings such as inaccurate color temperature and low luminous flux, which cannot meet the basic lighting needs of customers.

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