A kind of multilayer quantum dot film and backlight module

Abstract

The invention relates to a multi-layer quantum dot film and a backlight module group. A quantum dot core layer, an upper water and oxygen barrier layer and a lower water and oxygen barrier layer are included. A first quantum dot microcapsule layer is arranged between the quantum dot core layer and the upper water and oxygen barrier layer. A second quantum dot microcapsule layer is arranged between the quantum dot core layer and the lower water and oxygen barrier layer. The first quantum dot microcapsule layer and the second quantum dot microcapsule layer comprise, by weight, 80-110 parts of matrix adhesives, 3-41 parts of quantum dot microcapsules and 1-15 parts of diffusion particles. Luminescence efficiency stability of the multi-layer quantum dot film is good. A test is performed under high temperature and high humidity conditions. Brightness and color gamut attenuation are low and small.

Description

technical field [0001] The invention relates to the field of flat panel display technology, in particular to a multilayer quantum dot film and a backlight module using the film. Background technique [0002] The development of LCD (liquid crystal display) backlight has evolved from cold cathode fluorescent tube CCFL (cold cathode fluorescent lamp) to currently the most popular light emitting diode (Light emitting diode). The backlight device used on the liquid crystal display includes a light source for lighting, a reflector, a light guide plate, an optical diffusion film, and a prism sheet. The liquid crystal controls the passage of light, and the color filter adds color to it. The above components form a liquid crystal backlight module. Group. LCDs use a group of light-emitting diodes on the back of the device as a white light source. There are three main ways to achieve white light: [0003] The first is to cover the blue light chip with yellow phosphor to convert the e...

AI Technical Summary

Problems solved by technology

[0003] The first is to cover the blue light chip with yellow phosphor to convert the emitted blue light into white light. This method is simple and easy to use, and it is the most commonly used, but the color gamut NTSC is less than 70%.

[0004] The second is that the LED unit mixes the three primary colors of LED light sources to form white light, and the NTSC color gamut can reach 95%, but this method is complicated in manufacturing process and expensive, and the color of the synthesized white light is yellowish

[0006] In the third way of realizing white light, quantum dot film is made by existing technology, which has the problem of poor stability of quantum dot film, which leads to easy decay of luminous efficiency and greatly reduces the service life of the display

Red and green quantum dots are not resistant to high temperature, high humidity, and easy to be oxidized, so they need to be protected from water and oxygen. If the quantum dots are directly dispersed in the resin matrix adhesive, the solvent, leveling agent, and curing agent in the resin matrix adhesive Various additives such as additives make quantum dots easy to quench, affect the stability of quantum dots, and greatly reduce the luminous efficiency

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