LED RGB theory analysis
Effect of LED optical principle today to illustrate the three primary colors, white light through the prism after being broken down into a variety of colors gradual transition of chromatography, followed by the color red, orange, yellow, green, green, blue, purple, this is the visible spectrum. In which the human eye to red, green, blue is most sensitive to the human eye is like a three-color system of the receiver, most of the color can be red, green and blue according to the ratio of synthesis of different production. Similarly, most of monochromatic light can be broken down into red, green and blue lights.
This is the most basic principles of colorimetry, the three primary colors theory. Of three primary colors are independent of each other, any two colors can have other color composition. Red, green and blue are primary colors, three colors synthesis of the widest range of colors. Red, green and blue primary colors in accordance with the synthesis of different mixing ratio of additive color mixing is called additive. RGB three colors so that they are independent of any one color of which can not be generated from the other two color mixing.
Which is complete, that all other colors can be different from the three primary colors according to the proportion of combinations are.
There are two primary color systems, one is the additive system, the primary colors red, green, blue; the other is subtractive system, the three primary colors are yellow, blue, purple (or magenta). Adding different proportions of the three primary colors of light are called additive color mixing.
The rule is:
Red + Green = Yellow
Red + Blue = Purple
Blue + Green = Green
Red + Blue + Green = White
Color can also be the mixing various proportions of the painting with a paint or dye, that is, subtract color mixing. Because the pigment will absorb some elements of the incident light spectrum, is not absorbed and some is reflected, creating a unique color of the pigment. When mixed with different proportions of pigment, when the absorption spectra of their components is also changing, resulting in different color.
The rule is:
Yellow = White – Blue
Purple = White – Green
Green = White – Red
Yellow + Purple = White – Blue – Green = Red
Yellow + Green = White – Blue – Red = Green
Purple + Green = White – Green – Red = Blue
Yellow + Purple + Green = White – Blue – Green – Red = Black
Subtraction is mainly used for blending art, printing, textile and so on, we discuss the imaging system is used to add color mixing, pay attention to one to two confused. RGB additive color mixing with the above expressed as RGB color mode model, while the principle of phase by mixing RGB color model as expressed in CMYK mode, they are widely used in painting and printing fields. RGB mode is the most commonly used mapping software to a color pattern, in this mode, image processing more convenient and, RGB images than CMYK image storage is smaller, you can save memory and space. CMYK color model is a model, so it belongs to the printing mode, RGB mode, but essentially no different, but produce color in different ways. RGB is additive color mixing model, CMYK color mixing model for the subtraction.
For example, the display using RGB mode, because screen display is the electron beam bombardment on the issue of fluorescent material to produce light colors. When there is no time for the black light, white light when added to the maximum. The printer then? The ink will not issue its own light. Therefore only a specific light absorption and reflection with other light colors, so they need to use the subtractive method to solve.
According to the human eye's color vision characteristics of the above, you can choose from three primary colors, the proportion of them in different combinations lead to a variety of color vision. This is the main principle of the three primary colors.
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