The Principles And Applications Of RGB Signs
RGB color pattern is a kind of industrial color standard, is through the red (R), green (G), blue (B) three changes of color channel and superposition between them to get all kinds of color, RGB is represents the red, green, blue three channels of color, the standard almost includes the human vision can perceive all color, is one of the most widely used color system.
RGB is designed from the principle of color luminescence. Generally speaking, its color mixing is like three lights of red, green and blue, when their light overlap each other, the color is mixed, and the brightness is equal to the sum of the three brightness, the higher the mixing brightness, that is, the addition mixing. Red, green, blue three lights superposition, the center of the brightest superposition area for white, the characteristics of addition: the more the more bright.
Red, green, blue three color channel each color is divided into 256 order brightness, at 0 "light" the weakest —— is turned off, and at 255 "light" is the brightest. When the gray value is the same, the gray tone produces different gray values, that is, when the gray color is 0, it is the darkest black tone; when the gray color is 255, it is the brightest white tone.
RGB color is called color because you produce white by adding R, G, and B together (all light is reflected back to the eye). It is used for lighting light, TV and computer displays. For example, the display produces color by emitting light from red, green, and blue phosphors. Most visible spectra can be represented as a mixture of red, green, and blue (RGB) three colors in different proportions and intensities. When these colors overlap, they produce yellow, blue and purple.
The display is mostly using the RGB color standard, in the display, is through the electronic gun hit in the screen red, green, blue three color light pole to produce color, the computer can generally display 32 colors, there are more than 10 million kinds of colors. All the colors on the computer screen are made of red, green, blue and light in different proportions. A group of red, green and blue is a minimum display unit. Any color on the screen can be recorded and expressed by a set of RGB values. Therefore, the red, green and blue are also called three primary color light, expressed in English is R (red), G (green), B (blue).
In a computer, RGB's "quantity" refers to brightness and is represented by whole numbers. Typically, the RGB each has 256 levels of brightness, with numerical representation as from 0,1,2... to 255. Note that while the highest number is 255,0 is one of the values, thus 256. According to the calculation, the 256-level RGB colors can combine about 16.78 million colors, usually simply referred to as 16 million colors or ten million colors, also known as 24-bit colors (24 power of 2).
In the field of LED, 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 more rich and real color experience.
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