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Method and device for realizing color gradient of three-primary-color LED lamp

An LED light and color gradient technology, applied in lighting devices, lamp circuit layout, light source and other directions, can solve problems such as color overrun, achieve small software programming, realize color cyclic gradient process, multi-color display, smooth and smooth color Cyclic gradient process and the effect of multi-color display

Active Publication Date: 2017-07-18
KEBODA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Although the above method can achieve the effect of gradual change in the actual application process, there is a problem that the color exceeds the limit

Method used

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  • Method and device for realizing color gradient of three-primary-color LED lamp
  • Method and device for realizing color gradient of three-primary-color LED lamp

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Embodiment Construction

[0033] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0034] According to an embodiment of the present invention, a method for achieving color gradual change of a three-primary color LED lamp includes the following steps:

[0035] a. Convert the RGB values ​​of the target color and the initial color into CIE 1931 color coordinates (T_x, T_y) and CIE 1931 color coordinates (N_x, N_y) respectively;

[0036] b. Calculate the distance L_x of the CIE 1931 color coordinates (T_x, T_y) of the target color and the CIE 1931 color coordinates (N_x, N_y) of the original color in the x-axis direction and the distance L_y in the y-axis direction, L_x=|T_x-N_x |, L_y=|T_y-N_y|;

[0037] c. Calculate the CIE 1931 color coordinate of the current color according to the preset change speed delta of the color coordinate value (M j _x, M j _y); M j _x=(T_x-N_x)*delta / (L_x+L_y)+M j-1 _x,M j _y=(T_y-N_y)*delta / (L_x+L_y)+M j-1 _y; j = 1, 2,...

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Abstract

The invention discloses a method of realizing tricolor LED lamp color gradual change. The method comprises steps: color coordinates (T_x, T_y) and (N_x, N_y) of a target and an initial color are acquired; Lx=|T_x-N_x| and Ly=|T_y-N_y| are calculated; according to a color coordinate value change rate delta, color coordinates (Mj_x, Mj_y) of the current color are calculated; Mj_x=(T_x-N_x)*delta / (L_x+L_y)+Mj-1_x, and Mj_y=(T_y- N_y)*delta / (L_x+L_y)+Mj-1_y; duty ratios of three paths of PWM control signals outputted to a tricolor LED lamp driving circuit are calculated; and steps of c and d are repeated until |T_x- Mj_x|< / =|(T_x-N_x)*delta / (L_x+L_y)|, and the duty ratios of the three paths of PWM control signals are calculated according to the color coordinates of the target color. The invention also discloses a device for realizing the above method. During the color gradual change process, the color does not exceed a color gamut range.

Description

Technical field [0001] The invention relates to a method and a device for realizing the color gradation of a three primary color LED lamp. Background technique [0002] With the development of science and technology, the traditional monochromatic light source LED can no longer meet the needs of consumers. The emergence of three-color LED lights makes up for the shortcomings of single-color LED lights, and achieves color changes and diversification. According to the principle of light mixing of the three primary colors, the light sources of three colors of red, green and blue can mix colors in the gamut space. In practical applications, the RGB value of the target color is usually given first, and then the three-channel PWM signal used to control the three-primary color LED lamp is calculated according to the RGB value of the given target color, and finally controlled by the three-channel PWM signal The red LED, the green LED and the blue LED emit light of different brightness t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 陈烨萍唐杰史贺
Owner KEBODA TECH CO LTD
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