White LED modules encapsulation features

摘要

The behaviour and causes of changes for correlated color temperature (CCT)udand radiant spectral power in white LED modules of different design at theirudencapsulation by optical compounds are investigated. It is shown that CCT of originaludwhite LED radiation can both decrease and increase after polymeric covering application.udThe ССT variation direction is determined mainly by primary lens presence on LED. Theudvariation value of color parameters of white LED modules is determined by createdudoptical surface curvature and spectral characteristics of deposited polymer.