Three-color LED driving design applications typically by adjusting current to reach the balance and maximum brightness values。In general,we using most easiest and optimal way to design the full color display technology。White balance is most single for check the combination of color。The three primary colors are red and green and blue ， the three primary colors are mixed according to brightness proportion。blending after human eyes feel is pure white. Earlier CRT TV to the now LCD liquid crystal display are so constituted, LED course will mature technology copying.Chromaticity coordinates LED red, green, blue is unable to achieve the full effect of the chromatogram due to process and other reasons, and the control of the primary colors including a deviation of the brightness to achieve the white light, called the match color. When performing full-color LED display before，in order to achieve optimum brightness and the lowest cost, you should try to choose RGB luminous intensity of roughly 3: 6: 1 ratio of LED devices composed of pixels balance requires the synthesis of the three primary colors in the allocation value synthesis ，it is remains the same for pure white.merely a LED is very difficult to achieve, in order to solve this problem, in general， IC will set the current size, convenient for different batches of LED can be to achieve the same white light effectWe have synthesized color called original color; Application of the red, green, and blue color is primary called, three vertices is an ideal primary color wavelength in the chromaticity diagram。if there are deviations, the color synthesized area will be reduced, the triangle will shrink in the spectral table,from a visual point of view, the color deviation will not only reduce, as shown below.LED emitted Red, green, purple and blue light according to their different wavelength characteristics ，can be roughly divide into pure red, orange, orange, orange, yellow, green, pure green, green, blue-green, blue, violet, etc., orange , green, blue and purple , pure red, pure green, pure blue price is very cheap . Three primary colors of green is most important, because the green occupy 69% brightness white and color at the center of the transverse row of the table. Therefore when the relationship between the color of purity and price trade-offs between, green is the object of important consideration.