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 comprises a substrate (3), a blue LED chip (4) fixed on the substrate (3), and a YAG yellow fluorescent powder layer (6) overlaid on the blue LED chip (4). An outer fluorescent lampshade (1) which covers the blue LED chip (4) and the YAG yellow fluorescent powder layer (6) is further fixed on the substrate (3), and YAG yellow fluorescent powder is provided on the outer fluorescent lampshade (1). The secondary encapsulation structure has the advantages that colors of white light emitted by an LED illuminating lamp are uniform, soft, and harmonious; more importantly, influence of heat dissipated by the blue chip on the performance of the fluorescent powder can be effectively reduced, color temperature drift due to the heat of the chip is avoided, and the service life of the fluorescent powder is prolonged; and blue-light radiation dosage is effectively reduced, blue-light radiation is scattered uniformly, and the potential hazards to human and organisms are reduced.