White LED lamp secondary encapsulation structure capable of reducing blue-light hazards

摘要

A white LED lamp secondary encapsulation structure capable of reducing blue-light hazards has a substrate (3), a blue light LED chip (4) fixed on the substrate (3), and a YAG yellow fluorescent powder layer (6) overlaid on the blue light LED chip (4). A fluorescent outer lampshade (1) covering the blue light LED chip (4) and the YAG yellow fluorescent powder layer (6) is further fixed on the substrate (3). YAG yellow fluorescent powder is provided on the fluorescent outer lampshade (1). The structure allows emission of more uniform, soft and harmonious colors of white light, and reduces the influence of heat dissipated by the blue light chip on the performance of the fluorescent powder, thus preventing color temperature drift due to the heat of the chip, prolonging the lifespan of the fluorescent powder, reducing blue-light radiation dosage, scattering blue-light radiation, and reducing potential hazards to human and organisms.