Brightness correction method of three primary color LED light source

A LED light source and brightness correction technology, which is applied in the field of brightness correction of tri-color LED light sources, can solve problems such as not being able to meet the needs of consumers, and achieve the effects of improving experience, improving luminous effects, and reducing the amount of software programming

Active Publication Date: 2017-03-22
KEBODA TECH CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of science and technology, the traditional monochromatic light source LED can no longer meet the needs of consumers

Method used

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  • Brightness correction method of three primary color LED light source
  • Brightness correction method of three primary color LED light source
  • Brightness correction method of three primary color LED light source

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] According to an embodiment of the present invention, the method for correcting the brightness of a three-primary LED light source, wherein the three-primary LED light source includes multiple groups of three-primary LED modules, and the method for correcting the brightness of the three-primary LED light source includes the following steps:

[0029] Step a, receive the standard CIE1931 color coordinates (Sx1, Sy1) of the red LED of external input, the standard CIE1931 color coordinates (Sx2, Sy2) of the green LED, the standard CIE1931 color coordinates (Sx3, Sy3) of the blue LED, and for The standard duty ratios SD1, SD2 and SD3 of the PWM control signals used to control the red LED, the green LED and the blue LED respectively to achieve the target mixed light color.

[0030] The aforementioned external input may be, for example, an inp...

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Abstract

A brightness correction method of a three primary color LED light source is provided which comprises steps of: computing the standard color coordinates (SMxm, SMym) and the standard brightness SMYm of target mixed light colors according to externally input data; according to the standard color coordinates of the target mixed light colors and the actual color coordinates and actual brightness of the red LED, green LED, and the blue LED of each group of three primary colors LED modules, computing the duty cycles D1, D2 and D3 of the control signals of the red, green and blue LEDs of each group of three primary colors LED modules; computing the brightness MYm of the mixed light with the target mixed light colors generated by each group of the three primary color LED module; correcting the duty cycles D1, D2 and D3 of the control signals of the red, green and blue LEDs of each group of three primary colors LED modules to CD1, CD2 and CD3 respectively, wherein CD1 = K * D1, CD2 = K * D2, CD3 = K * D3, K = SMYm / MYm. The method realizes that different three primary color LED modules keep the same brightness when giving light with the same color.

Description

technical field [0001] The invention relates to a brightness correction method of a three-primary-color LED light source. Background technique [0002] With the development of science and technology, the traditional monochromatic LED light source can no longer meet the needs of consumers. The emergence of tri-color LED light sources makes up for the lack of monochromatic LED light sources, and realizes color changes and diversification well. A three-primary-color LED light source is usually composed of multiple groups of three-primary-color LED modules, and each group of three-primary-color LED modules is composed of red LEDs, green LEDs and blue LEDs. According to the light mixing principle of the three primary colors, the colors in the color gamut space can be mixed by light sources of three colors: red, green, and blue. In practical applications, the RGB value of the target color is usually given first, and then the three-way PWM signal used to control the three-primary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/20
Inventor 陈烨萍唐杰李凌耀
Owner KEBODA TECH CO LTD
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