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Quantum dot/epoxy resin particle, preparation method thereof, quantum dot optical film and backlight module

A technology of epoxy resin and backlight module, which is applied in the direction of optics, nonlinear optics, electric light source, etc., can solve the problems of short service life of quantum dots, and achieve improved luminous efficiency, pure color, light conversion efficiency and brightening effect Enhanced effect

Inactive Publication Date: 2016-02-10
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a quantum dot / epoxy resin particle and a preparation method thereof, a quantum dot optical film and a backlight module, aiming at solving the problem of the quantum dot service life currently used in liquid crystal displays. short question

Method used

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  • Quantum dot/epoxy resin particle, preparation method thereof, quantum dot optical film and backlight module
  • Quantum dot/epoxy resin particle, preparation method thereof, quantum dot optical film and backlight module

Examples

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Effect test

Embodiment 1

[0060] Preparation of quantum dots / epoxy particles:

[0061] 1) Disperse red and green quantum dots CdTe / CdS into hydrogenated bisphenol A epoxy resin diluted with butyl glycidyl ether, and further disperse and mix evenly by mechanical shearing. Wherein red and green quantum dots account for 1% and 5% of hydrogenated bisphenol A type epoxy resin respectively;

[0062] 2) Under stirring conditions, add the curing agent maleic anhydride and the methylimidazole with a mass proportion of 75% of the hydrogenated bisphenol A epoxy resin, and then slowly raise the temperature to 130-160°C to cure Obtain quantum dot / epoxy resin bulk material;

[0063] 3) The obtained quantum dot / epoxy resin block material is mechanically ground to obtain CdTe / CdS quantum dot / epoxy resin particles with a particle size of 3-5 μm and double bond groups on the surface.

[0064] Preparation of quantum dot optical film:

[0065] i) The prepared CdTe / CdS quantum dots / epoxy resin particles are dispersed in...

Embodiment 2

[0069] Preparation of quantum dots / epoxy particles:

[0070] 1) Disperse the red and green quantum dots CdSe / ZnS into the bisphenol S epoxy resin treated with phenyl glycidyl ether, and further mix them uniformly by ultrasonic dispersion. Among them, the red and green quantum dots accounted for 3% and 8% of the hydrogenated bisphenol A epoxy resin, respectively.

[0071] 2) Under the condition of stirring, add the curing agent isophorone diamine with a mass ratio of 2:1 to the bisphenol S epoxy resin, then slowly raise the temperature to 80°C, and cure to obtain the quantum dot / epoxy resin block material .

[0072] 3) The obtained quantum dot / epoxy resin bulk material is mechanically ground to obtain 2-3 μm CdSe / ZnS quantum dot / epoxy resin particles containing amine groups on the surface.

[0073] Preparation of quantum dot optical film:

[0074] i) Setting the water and oxygen barrier layer SiO on the side of the quantum dot layer 2 / parylene.

[0075] ii) Disperse the p...

Embodiment 3

[0079] Preparation of quantum dots / epoxy particles:

[0080] 1) Disperse red quantum dots CdTe / CdS / ZnS and green quantum dots CdSe / CdS into reactive diluent-treated bisphenol F epoxy resin, and further disperse and mix uniformly by mechanical shearing. Among them, the red and green quantum dots accounted for 2% and 6% of the hydrogenated bisphenol A epoxy resin, respectively.

[0081] 2) Under stirring conditions, add a curing agent ethylenediamine in a ratio of 3:1 to the bisphenol F epoxy resin substance, and cure at room temperature to obtain a quantum dot / epoxy resin block material;

[0082] 3) The obtained quantum dot / epoxy resin bulk material is mechanically ground to obtain 4-6 μm quantum dot / epoxy resin particles containing amine groups on the surface.

[0083] Preparation of quantum dot optical film:

[0084] i) The prepared quantum dots / epoxy resin particles are dispersed in the optical resin PU, and coated on the prepared transparent substrate PET, followed by hea...

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Abstract

The invention discloses a quantum dot / epoxy resin particle, a preparation method thereof, a quantum dot optical film and a backlight module. The preparation method of the quantum dot / epoxy resin particle comprises the following steps: pre-dispersing and packaging quantum dots in an epoxy resin block, and grinding the obtained epoxy resin block. The structure of the quantum dot / epoxy resin particle effectively reduces the quantum dot agglomeration and the possibility of interference and destroy caused by agglomeration, and allows the quantum dots to be uniformly dispersed in the obtained optical film, so the quantum dot utilization rate is obviously improved. The phototransformation efficiency and the brightening effect of the backlight module made by using the quantum dot optical film are obviously improved. The backlight module can be applied to a display to realize pure color, high saturation and high color gamut of the R / G / B color sub-pixel units corresponding to color filters and improve the luminescence efficiency.

Description

technical field [0001] The invention relates to the technical field of liquid crystal displays, in particular to a quantum dot / epoxy resin particle and a preparation method thereof, a quantum dot optical film and a backlight module. Background technique [0002] The important method for liquid crystal display (liquid crystal display, LCD) to realize full-color display is white light backlight plus filter technology. White light backlight is generally a combination of blue light and yellow light formed by blue light emitting diodes (Light Emitting Diode, LED) exciting YAG phosphor powder Mixed light, due to the impure color of the mixed light, often results in a relatively low color gamut of the picture, poor color saturation, and low light source utilization. The use of nano-sized quantum dots as light conversion materials can well solve the above problems The problem is that nano-sized quantum dots have the characteristics of wide absorption peak, narrow emission peak, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08L63/00C08K3/30C08G59/42C08G59/50C08F283/10C08F220/14C08L75/04C08J5/18F21S8/00G02F1/13357
Inventor 李雪付东
Owner TCL CORPORATION
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