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High-color-rendering white light LED light mixing control method based on PWM dimming and light source module

A control method and light source module technology, which is applied in the field of LED dimming and color adjustment, can solve problems such as falling into a local optimal solution and failing to obtain a global optimal solution, and achieve the effect of optimizing color rendering performance

Inactive Publication Date: 2021-06-01
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, some scholars use the optimization function in the Matlab optimization toolbox to optimize nonlinear functions under multiple constraints, but the optimization process tends to fall into local optimal solutions and cannot obtain global optimal solutions.

Method used

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  • High-color-rendering white light LED light mixing control method based on PWM dimming and light source module
  • High-color-rendering white light LED light mixing control method based on PWM dimming and light source module
  • High-color-rendering white light LED light mixing control method based on PWM dimming and light source module

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Embodiment Construction

[0029]In order to better understand the present invention, the technical solutions of the present invention will be further described below in connection with those skilled in the art.

[0030]The color color index is used to indicate that the light source is reduced to the actual color of the illumination object, the maximum value is 100, the higher its value, the stronger the color reduction ability. The calculation formula of the special color color index of a certain standard color sample is:

[0031]Ri= 100-4.6 ΔEi(I = 1, ..., 14). (1)

[0032]ΔEiFor 14 color samples at standard light sources and the color difference under the source of the source to be tested. Usually, use the general color index RA to represent the color change performance of the light source, and the RA refers to the average color syndrome of a particular eight standard color sample:

[0033]

[0034]The calculation formula of the color temperature is:

[0035]Tc= 449n3+ 3525N2+ 6823.3N + 5520.33 (3)

[0036]It indicates that wh...

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Abstract

The invention discloses a high-color-rendering white light LED light mixing control method based on PWM dimming and a light source module, the high-color-rendering white light LED light mixing control method based on PWM dimming comprises the following steps: 1) mixing any two primary colors in four primary colors to be converted into three primary colors, wherein the proportion of one primary color in the mixing of the two primary colors is r, (2) establishing a luminous flux relation of the R / G / B / WW four-color LED in the mixed white light under the target luminous flux by adopting 1931 CIE-XYZ tristimulus values; 3) determining a linear relation between the luminous flux and the duty ratio; 4) when the duty ratio of each primary color is in the range of [1, 100], changing the r value to obtain the luminous flux proportion and the color rendering index of each color light source of the R / G / B / WW four-color LED under different r, and 5) taking the r value corresponding to the maximum color rendering index and obtaining the corresponding optimal duty ratio. According to the invention, the target color rendering performance is optimized.

Description

Technical field[0001]The present invention belongs to the field of LED dimming color toning technology, and in particular, the present invention relates to a high colorime white LED mixing control method and a light source module based on PWM dimming.Background technique[0002]LED (LED) light source has a small size, low energy consumption, low voltage and controllable performance. It has gradually replaced incandescent lamps, fluorescent lamps, fluorescent lamps, etc., and LEDs have become a new type of green light source product. The trend of future development. At present, the LED lighting products on the market are not adjustable for fixed colors. Most of the lighting products are opened and closed with various common switches. The brightness adjustment of the light is also adjusted by dimming open light. Therefore, for Implementing light intensity and color temperature adjustable to meet dynamic lighting under different conditions, there is a need to regulate multiple LED light ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D25/02G05B13/04H05B45/20H05B45/325
CPCG05B13/042G05D25/02
Inventor 田会娟胡阳陈陶
Owner TIANJIN POLYTECHNIC UNIV
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