The three primary colors refer to red, green, and blue. The human eye is most sensitive to these three colors, and most of the colors are synthesized by these three colors in different proportions. Here are two ways to get white light:

1) RGB is the white light obtained by mixing the three primary colors, or the white light generated by the single color mixing;

2) White light is generated by exciting the special phosphor coating emitted by the blue LED;

    The so-called blue light LED excitation phosphor to generate white light technology, simply put, the blue chip emits a phosphor coating with a wavelength of about 450-455nm, which is converted into the visible spectrum and replaced with visible white light. Blue LED is characterized by the thickness requirements and design technology of the coating. The increase or decrease of the coating thickness has a great influence on the generation of the visible spectrum, and the visible spectrum will tend to yellow light when the thickness increases.

   To test the light quality of the white LED first, there is a very simple way, just stick a piece of white paper on the top of the LED lamp bead, and see if there is yellow light along the edge of the wide angle.

      In addition to the design of three primary colors and blue LED technology, for the research and development of light color, a secondary optical design scheme has been carried out, especially the lens scheme, which is aimed at dealing with the phenomenon of color separation when dealing with some special light types and small angles. The design principle of the secondary optical lens is to improve the secondary optical device and reduce the problem of color separation of the LED spectral distribution on its special surface light mixing. From the initial simple frosted surface to the suede surface, to the present complex RZ mixed glossy surface treatment technology.

       Compared with the traditional matte surface technology with uncontrollable optical path, the RZ light mixing surface treatment technology maximizes the uniformity of light and color, with fast efficiency and high controllability.