30results about How to "Reduce blue light hazards" patented technology

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.

The invention provides a spectral cutting LED mosquito-repelling bulb and a manufacturing method thereof. The bulb comprises a lamp base and a bulb shell; the lamp base and the bulb shell are fixedlyconnected; a driving power supply is arranged in the lamp base; a core column is arranged on the lamp base; the core column is connected with an LED light-emitting unit; the core column and the LED light-emitting unit are arranged in the bulb shell; the lamp base, the driving power supply, the core column and the LED light-emitting unit are electrically connected in sequence; a spectral cutting layer is arranged on the inner wall of the bulb shell; the LED light-emitting unit comprises a bracket; a plurality of PCBs are arranged on the bracket in a surrounding mode; LED lamp beads are arrangedon the outer sides of the PCBs; the core column, the PCBs and the LED lamp beads are electrically connected in sequence; and the plurality of PCBs are arranged on the bracket in a surrounding way ina mode that the PCBs are not in contact in pairs. According to the bulb, the spectral cutting layer is adopted to cut blue purple spectrums loved by mosquitoes; continuous spectrums of other white light are reserved; and the bulb is high in power, has a good mosquito repelling effect, is suitable for human eye vision, can reduce the harm of blue light, is especially suitable for use at night, andis low in manufacturing cost.

The present invention provides an apparatus for reducing blue light hazard, including: a blue light source and a control module. The control module regulates the blue light source to emit a blue intermittent illumination in a fixed frequency, and a user who looks into the blue light source may perceive visual persistence effect via the blue intermittent illumination. On the other hand, the present invention also provides apparatus for reducing blue light hazard that utilizes a polarizer or a phase adjusting device. Further, various methods for reducing blue light hazard are also provided.