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Quantum dot material, preparation method, quantum dot film, backlight module and display device

A quantum dot material and quantum dot technology, applied in the field of liquid crystal display, can solve the problems of easy agglomeration, uneven dispersion of quantum dots, high overlap rate of quantum dots, etc., and achieve the goal of reducing luminous efficiency, improving luminous efficiency, and reducing light loss Effect

Active Publication Date: 2017-02-22
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventors have found that there are at least the following problems in the prior art: in the existing quantum dot film, the quantum dots are not uniformly dispersed, agglomeration is easy to occur, and the quantum dot overlap rate is high, so that the quantum dot film The luminous efficiency is low, which affects the brightness of the backlight module, which in turn affects the display effect of the liquid crystal display device
At the same time, the inorganic coating in the water-oxygen barrier layer will reduce the light transmittance of the quantum dot film and also affect the brightness of the backlight module, and the cost of the water-oxygen barrier layer accounts for 30% to 50% of the total cost of the quantum dot film. % above, making the cost of the existing quantum dot film higher

Method used

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  • Quantum dot material, preparation method, quantum dot film, backlight module and display device
  • Quantum dot material, preparation method, quantum dot film, backlight module and display device
  • Quantum dot material, preparation method, quantum dot film, backlight module and display device

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preparation example Construction

[0050] In the first aspect, an embodiment of the present invention provides a method for preparing a quantum dot material, see figure 2 , the preparation method comprises the following steps:

[0051] Step 1, mix silicate, organic solvent, silane coupling agent, polymer monomer, initiator and water evenly; polymer monomer is used to prepare transparent flexible polymer monomer, and initiator is used for catalytic Initiator for the polymerization of polymer monomers.

[0052] Step 2, adding quantum dots to the system obtained in step 1 and mixing uniformly; the quantum dots are quantum dots formed by II B group elements and VI A group elements and / or quantum dots formed by III A group elements and V A group elements .

[0053] In step 3, the system obtained in step 2 is reacted at a preset temperature for a preset time to form a wet gel.

[0054]In step 4, the wet gel obtained in step 3 is transformed into an aerogel by supercritical drying or freeze drying to obtain quantu...

Embodiment 1

[0086] An embodiment of the present invention provides a quantum dot material and a preparation method thereof. The quantum dot material uses silica / polymethyl methacrylate hybrid airgel as a matrix to load quantum dots, and utilizes the three-dimensional network structure of the airgel to make Quantum dots are evenly dispersed to prevent quantum dots from agglomerating. In the quantum dot material provided in this embodiment, the quantum dots used are CdSe / ZnS quantum dots with a core-shell structure, and the particle size of the quantum dots is 2-10 nm.

[0087] The preparation method of the quantum dot material provided in this embodiment is as follows:

[0088] Step 101, tetraethyl orthosilicate (TEOS), ethanol, γ-chloropropyl triethoxysilane (silane coupling agent KH550), methyl methacrylate (MMA), benzoyl peroxide and water according to The molar ratio is 1:0.2:0.05:0.5:0.25:2 for mixing.

[0089] In step 102, the materials in step 101 are uniformly mixed, and then the...

Embodiment 2

[0096] An embodiment of the present invention provides a quantum dot material and a preparation method thereof. The quantum dot material uses silica / polymethyl methacrylate hybrid airgel as a matrix to load quantum dots, and utilizes the three-dimensional network structure of the airgel to make Quantum dots are evenly dispersed to prevent quantum dots from agglomerating. In the quantum dot material provided in this embodiment, the quantum dots used are CdTe quantum dots, and the particle size of the quantum dots is 2-10 nm.

[0097] The preparation method of the quantum dot material provided in this embodiment is as follows:

[0098] Step 201, mix tetraethyl orthosilicate (TEOS), methanol, γ-chloropropyltrimethoxysilane, methyl methacrylate (MMA), azobisisobutyronitrile and water in a molar ratio of 1:0.1:0.02 :0.3:0.15:1 ratio for mixing.

[0099] In step 202, the materials in step 201 are mixed uniformly, and then the above-mentioned CdTe quantum dots are added thereto.

...

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Abstract

The invention discloses a quantum dot material, a preparation method, a quantum dot film, a backlight module and a display device, and belongs to the technical field of liquid crystal display. The preparation method of the quantum dot material includes the steps of a, evenly mixing silicate ester, organic solvent, silane coupling agent, polymer monomer, initiator and water, wherein the polymer monomer is a monomer for preparing a transparent flexible polymer, and the initiator is an initiator for initiating the polymerization reaction of the polymer monomer; b, adding quantum dots into a system obtained in the step a to be evenly mixed; c, making the system obtained in the step b react for a preset period of time at preset temperature to form wet gel; d, converting the wet gel obtained in the step c into aerogel through a supercritical drying method or a freeze-drying method to obtain the quantum dot material. The quantum dots are loaded on a three-dimensional network structure of silicon dioxide / organic polymer hybridized aerogel, the overlapping rate of the quantum dots is decreased, the light-emitting efficiency of the quantum dot film is improved, and meanwhile the water-oxygen insulation performance is improved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a quantum dot material and a preparation method, a quantum dot film, a backlight module and a display device. Background technique [0002] With the continuous development of liquid crystal display technology, consumers have higher and higher requirements on the color gamut of liquid crystal display devices. In recent years, whether in the International Consumer Electronics Show (CES) or in the China Appliance Expo (AWE), liquid crystal display devices with high color gamut have become the mainstream of development. At present, the color gamut of the liquid crystal display device is mainly improved by using the quantum dot technology to provide a backlight source for the liquid crystal display device. Specifically, a quantum dot film is arranged above the diffusion plate or the light guide plate of the backlight module of the liquid crystal display device. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/14C08F2/44C08K3/36C08J9/28C09K11/02C09K11/88G02F1/1335C08L33/12
CPCC08F2/44C08F120/14C08J9/28C08J2201/0502C08J2205/026C08J2333/12C08K3/36C09K11/02C09K11/88G02F1/1336G02F1/133614
Inventor 刘振国李富琳宋志成
Owner HISENSE VISUAL TECH CO LTD
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