Perfecto LED Manufacturers

The use of green fluorescent blue LED with yellow phosphor and chips, available high-brightness white LED; if the use of green phosphors with blue LED chips, can be green; if the use of green with yellow phosphor and blue phosphor LED chips can get cool colors white; green phosphor can be with red and blue LED chips and phosphor was white. The white LED color rendering index (CRI) and the blue chips, YAG phosphor, correlated color temperature, etc., of which the most important is the YAG powder, different color temperature zone LED, with the pink and blue chips are different. Target color temperature, the lower of the tube with the powder emission peak to longer peak chip have long, less than the 4000K color temperature, but also by adding another red, pink, red components to make up for the shortage, to improve the color index purpose of keeping the chips and powder in the same conditions, the higher the color rendering index higher color temperature.
Summed up in production experience, the best matching blue ties with YAG as follows:
YAG emission peak / nm blue peak wavelength / nm
530 ± 5 450-455
540 ± 5 455-460
550 ± 5 460-465
555 ± 5 465-470
White made it more white, are generally chip manufacturers to provide the main wavelength, peak wavelength to use specialized testing equipment, test out the value of the ordinary than the main wave length is about 5nm. Phosphor and chips wavelength determines the color coordinates in a straight line, determine the wavelength of phosphor and chips. As long as the increase in the ratio can be adjusted to reduce the color coordinates on a straight line in this location.
Common LED die are as follows:
Materials Materials wavelength wavelength
InGaN 475-485nm InGaN 525nm
InGaN 465-475nm InGaN 505nm
InGaN 455-465nm InGaN 515nm
InGaAlP 620-640nm GaAlAs / GaAs 660nm
InGaAlP 610-620nm GaAlAs / GaAlAs 660nm
InGaAlP 600-610nm GaP 700nm
InGaAlP 592-600nm GaP 570-575nm
InGaAlP 580-593nm GaP 565-570nm
InGaAlP 567-577nm GaP 550-565nm
InGaAlP 550-565nm PY — GaAlAs 585nm
Because there are inorganic phosphor and organic phosphors. If the circumstances to add organic phosphor, YAG phosphor and AB glue ratio is usually 1:6 to 10 (weight ratio). The AB should be 6 ~ 10g glue between the number of the number of blue chip as the power must be adjusted size. Chip power of the major ones, under constant volume in the phosphor, AB glue should be relatively small amount (eg 1:6). On the contrary, the power of the smallest number of AB glue to be more and more (example: 1:10).