A kind of blue light blocking film and preparation method thereof

Abstract

The invention relates to the technical field of optics and provides a brand-new optical film structure, in particular to the optical film structure capable of being applied to the fields including LEDs liquid crystal display screens and the like. The optical film can realize optical beam splitting and selective transmission in the visible light band of 350-750 nm. The optical film can also effectively block and filter light in the blue violet band of 350-500 nm, and can particularly well block the light blue part of 460 nm or smaller. The optical film belongs to a brand-new blue light barrier film. The film at least comprises a substrate layer, a blue light barrier layer and a blue light dispersion absorption layer which are stacked together sequentially. When the optical film is in use, a UV hardening layer and a scratch resistant layer can be formed on the blue light dispersion absorption layer and a release protective layer can be formed behind the substrate layer. The blue light barrier film has the advantages that the blue light barrier efficiency can reach 90% or higher and harmful light in the blue violet band of an LED lighting source can be filtered, and the blue light barrier film can be widely used in any field to which the LED lighting sources are applied and has broad market prospect.

Description

technical field [0001] The invention relates to the field of optical films, in particular to a blue light blocking film and a preparation method thereof. Background technique [0002] Semiconductor light-emitting diodes (LED for short) have been used in various lighting fields such as decorative lighting, automotive lighting, and backlight due to their long service life, energy saving, and small size. LED has 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. LED lighting and backlights in these applications are basically realized by white LEDs for color filtering and splitting into red, green, and blue light. The white LEDs generally use blue light generated by blue LEDs to excite phosphors to generate mixed white light. Due to this principle, many manufacturers directly improve the overall performance ...

AI Technical Summary

Problems solved by technology

However, blue light blocking films in the prior art are generally realized by arranging blue light absorbing pigments or blue light blocking agents therein. This method of directly arranging absorption blocking components does not fully disperse blue light for absorption, and the existing absorption The blocking agent component is monotonous and belongs to the traditional component that has been used for many years. It has a serious deficiency in the blue light absorption efficiency. Therefore, the prior art does not actually solve the blue light problem of LED lighting. Based on this, the present invention proposes A kind of blue light blocking film and preparation method thereof

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