Preparation method of blue light blocking packaging layer

Abstract

The invention relates to a divisional application of a Chinese patent application with an application number of 201710875198.1. The invention provides a preparation method of a blue light blocking packaging layer. The blue light blocking packaging layer comprises a substrate layer, a blue light blocking layer and a blue light dispersion absorption layer, the blue light blocking layer is arranged on the substrate layer, and the blue light dispersion absorption layer is arranged on the blue light blocking layer; the substrate layer is formed by uniformly dispersing a blue light absorption pigment on a first substrate, the blue light blocking layer is formed by uniformly dispersing a blue light blocking agent on a second substrate, and the blue light dispersion absorption layer is formed by uniformly dispersing a blue-violet absorbent and blue light dispersion nanoparticles on a third substrate. The blue light blocking packaging layer prepared by the invention can well filter blue-violetharmful wave band light and emit soft white color light, can be widely applied to various LED lighting, is an innovative application of an existing white LED lighting device, and has a wide development prospect.

Description

[0001] This application is a divisional application of a Chinese patent application with the application number 201710875198.1, the application date is September 25, 2017, and the invention title is "A LED white light source device". technical field [0002] The invention relates to the field of LED lighting, in particular to a preparation method of a blue light blocking encapsulation layer. Background technique [0003] Due to its long service life, energy saving, small size and other advantages, semiconductor light-emitting diodes (LEDs) have been used in various lighting fields such as decorative lighting, automotive lighting, and backlights. LEDs have been recognized as the most valuable new technology in the 21st century. light source. Now almost every one of us comes into contact with LED light sources every day, such as household lighting and computer backlights, etc. Most of the LED lighting devices in these applications are LED lighting devices that emit white light...

AI Technical Summary

Problems solved by technology

[0004] White light LED lighting devices have been widely used, including desk lamps in daily life. However, although the existing white light LED lighting devices emit white light, there is a lot of light in the blue-violet band, which is difficult for human eyes to distinguish. Moreover, in order to increase the brightness of white LED lamps, many manufacturers directly increase the overall brightness of white LEDs by increasing the intensity of blue light. Therefore, the white light spectrum emitted by white LED lighting devices in the prior art contains strong blue light components.