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Quantum dot film and backlight module

A technology of quantum dots and quantum dot layers, applied in the field of quantum dots, can solve the problems of short service life of quantum dots, increased cost, high temperature of LED chips, etc., and achieve the effect of improving light conversion efficiency, improving utilization rate, and reducing thickness

Inactive Publication Date: 2014-01-01
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The amount of quantum dots in the first position is very small, but the LED chip has a high temperature, and the service life of quantum dots is short
The third method is generally to disperse the quantum dots on the diaphragm, which is the farthest from the LED and the temperature is low, but the amount of quantum dots is large and the cost is high.
[0006] The thickness of the quantum dot film is about tens to one hundred microns. Under such a thin thickness, the light conversion rate of quantum dots is very low. In the prior art, the light conversion rate of quantum dots is usually improved by increasing the content of quantum dots. rate, however, due to the high price of quantum dots, it will increase the cost

Method used

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  • Quantum dot film and backlight module

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Experimental program
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Effect test

Embodiment approach 1

[0058] ginseng figure 1 Shown, a kind of quantum dot thin film comprises:

[0059] The quantum dot layer 10 , the quantum dot layer 10 includes a matrix 11 and a number of quantum dots uniformly dispersed in the matrix 11 , the quantum dots in this embodiment include red quantum dots 111 and green quantum dots 112 . The matrix 11 also includes a number of uniformly dispersed diffusion particles 113, the diffusion particles 113 are used to scatter the incident light in the matrix and increase the optical path of the light passing through the quantum dot layer;

[0060] The water vapor barrier layers on both sides of the quantum dot layer 10 include a first water vapor barrier layer 21 above the quantum dot layer 10 and a second water vapor barrier layer 22 below the quantum dot layer 10 . The moisture vapor barrier is a solid material, or a cured liquid, gel, polymer.

[0061] In this embodiment, the material of the matrix 11 is acrylate resin, organosiloxane resin, acrylate-...

Embodiment approach 2

[0076] Such as image 3 As shown, a first microstructure 31 is provided on the surface of the first water vapor barrier layer 21. In this embodiment, the first microstructure is an isosceles triangle. In other embodiments, the microstructure may also include isosceles triangle, polygon A combination of one or more of conical, conical, hemispherical, and irregular shapes with raised structures on the surface.

[0077] The quantum dot layer and the water vapor barrier layer in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

Embodiment approach 3

[0079] Such as Figure 4 As shown, a first microstructure 31 and a second microstructure 32 are respectively provided on the surfaces of the first water vapor barrier layer 21 and the second water vapor barrier layer 22. In this embodiment, the first microstructure and the second microstructure are hemispherical In other embodiments, the microstructure can also be a combination of one or more of the microstructures including isosceles triangle, polygonal cone, cone, hemisphere, and irregular shapes with raised structures on the surface.

[0080] The quantum dot layer and the water vapor barrier layer in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

[0081] Correspondingly, the backlight module in another embodiment of the present invention includes: a light source, a light guide plate, a prism sheet, and a quantum dot film, wherein the quantum dot film is located anywhere above the light guide plate and below the prism sheet. The quant...

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Abstract

The invention discloses a quantum dot film and a backlight module. The quantum dot film comprises a quantum dot layer, wherein the quantum dot layer comprises a matrix and multiple quantum dots which are uniformly dispersed in the matrix; multiple diffusion particles which are uniformly dispersed are arranged in the matrix; a refractive index difference between the diffusion particles and the matrix is more than 0.01; the diffusion particles are used for scattering incident rays in the matrix; an optical path through which the rays pass the quantum dot layer is increased. According to the quantum dot film, the optical path through which the rays pass the quantum dot layer can be increased, the quantum dot utilization rate is increased, the light conversion efficiency is improved, and the cost is reduced. Moreover, three effects of light conversion, atomization and brightness enhancement can be provided, and the thickness of the backlight module is reduced.

Description

technical field [0001] The invention relates to the technical field of quantum dots, in particular to a quantum dot film and a backlight module. Background technique [0002] Liquid crystal display (LED) backlight mostly adopts cold cathode fluorescent lamp (CCFL), but as the market demands, light emitting diode (LED) is used because of its small size, energy saving and Features such as environmental protection have gradually replaced CCFL as the backlight source for LCDs. [0003] There are two main types of white LEDs used in backlight modules: one is the blue light emitted by the LED itself, which excites the yellow phosphor, and the two colors are mixed to form white light; the other is the LED unit that mixes the three primary colors of LED light sources to form white light; The third is LED blue light. By exciting two kinds of quantum dot phosphors, red and green, the three colors of light are mixed to form white light. Among them, the third method is a method that h...

Claims

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Application Information

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IPC IPC(8): G02B5/02F21V5/08G02F1/1335
Inventor 刘光肖志宏丁清华吴智华
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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