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What is RGB LED Light?

Date:Mar 10, 2021

RGB is designed based on the principle of color luminescence. Popularly speaking, its color mixing method is like three lights of red, green and blue. When their lights overlap each other, the colors are mixed, but the brightness is equal to The sum of the brightness of the two, the more mixed, the higher the brightness, that is, additive mixing. 

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The imaging principle of RGB lamp: RGB lamp adopts the integrated image of three primary colors co-crosslinked, deformed, there are also blue LEDs with yellow phosphors, and UV LEDs with RGB phosphors. On the whole, these two have their imaging principles, but attenuation Both the problem and the impact of ultraviolet rays on the human body are difficult to solve in a short period of time. Therefore, although both can meet the needs of white light, they have different results.

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RGB LED Applications

RGB is obviously more diverse than white LEDs in application. For example, when a certain band of light is needed for car lights, traffic signs, shop windows, etc., the color mixing of RGB can be suitable. On the other hand, if RGBLED lights are used in lighting, their effectiveness is obviously weaker than white light, because they mainly depend on the luminous flux, life and pure color of white light when used in lighting. At present, RGBLED lights are mainly used in decorative lights.

Principle of color change of RGB LED

When two LEDs are lit by three primary color LEDs, it can emit yellow, purple, and cyan colors (such as red and blue LEDs emit purple light when they are lit); if the red, green, and blue LEDs are lit at the same time , It will produce white light. If there is a circuit that can make the red, green, and blue LEDs light up two by two, individually light up, and light up the three primary color LEDs at the same time, it can emit seven different colors of light, so the colorful LED lights appear. This phenomenon.

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All the colors on the computer screen are composed of the red, green and blue colors mixed in different proportions. A group of red, green and blue is the smallest display unit. Any color on the screen can be recorded and expressed by a set of RGB values.

In computers, the so-called "how much" of RGB refers to brightness, and it is represented by integers. Under normal circumstances, RGB each has 256 levels of brightness, which are represented by numbers from 0, 1, 2... until 255. Note that although the highest number is 255, 0 is also one of the numbers, so there are 256 levels in total.

According to calculations, 256-level RGB colors can combine a total of about 16.78 million colors, that is, 256×256×256=16777216. Often referred to as 16 million colors or tens of millions of colors. Also called 24-bit color (2 to the 24th power).

In the LED field, three-in-one dot-array full-color technology is used, that is, full-color pixels are composed of RGB three-color chips in a light-emitting unit. As this technology continues to mature, LED display technology will bring people a richer and more true color experience.


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