Photoelectric Characteristics Research of High-power White Light LED and Blue Light LED

The parameters such as the input power,luminous flux and luminous efficiency of metal based PCB 1 W high-power white LED and high-power blue LED which have the same structures,similar chips are measured.The luminous fluxes,luminous efficiency with the changes in input power of blue LED and white LED are compared.Compared with blue LED,the reason of the luminous efficiency of white LED declined faster is mainly due to the decline of the conversion efficiency of phosphor.