Light mixing method based on three-primary-color LEDs

A technology of three primary colors and mixed light, which is applied in the field of LED mixed light, can solve the problems of uneven quality and color drift of smart lights, and achieve the effects of compensating for the influence of color temperature, reducing the duty cycle, and reducing the deviation of color temperature

Inactive Publication Date: 2016-11-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 o

Method used

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  • Light mixing method based on three-primary-color LEDs
  • Light mixing method based on three-primary-color LEDs
  • Light mixing method based on three-primary-color LEDs

Examples

Experimental program
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Embodiment

[0067] Choose RGB three-in-one LED, the model is Cree CLX6A-FKB RGB three-in-one 3535 lamp bead. Its dominant wavelength is λ DR =623.3nm,λ DG =520.2nm,λ DB = 465.9 nm. In order to achieve the lighting effect and realize the precise dimming of LEDs, six such lamp beads are used in series in this experiment, and three-channel PWM dimming and color adjustment are used. In order to achieve the purpose of lighting, 6 lamp beads are used in parallel, and the spectrometer is used to obtain the spectral power distribution S of each monochromatic light. i (λ), and then calculate the tristimulus value of each monochromatic light.

[0068] The photometric and chromatic performance parameters of the RGB three-primary color LED are obtained through the spectrometer test, as shown in the following parameter table 1.

[0069] Table 1 Parameter table of LED lamp beads in the experiment

[0070] lamp beads

Color coordinate X

Color coordinate Y

Luminous flux / lm

...

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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...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00H05B45/325
CPCH05B45/00
Inventor 刘丽兰孙伟斌戚梦佳马仁飞梅健健
Owner SHANGHAI UNIV
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