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Quantum dot material as well as preparation method, quantum dot film, backlight module and display equipment

A technology of quantum dot material and quantum dot film, which is applied in the field of liquid crystal display, can solve the problems of affecting the display effect of liquid crystal display equipment, low luminous efficiency of quantum dot film, and affecting the brightness of backlight module, etc., so as to improve the display effect and reduce the overlap rate , Improve the effect of luminous efficiency

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

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventors have found that at least the following problems exist in the prior art: in the existing quantum dot film, the quantum dots are not uniformly dispersed, agglomeration easily occurs, 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

Method used

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  • Quantum dot material as well as preparation method, quantum dot film, backlight module and display equipment
  • Quantum dot material as well as preparation method, quantum dot film, backlight module and display equipment
  • Quantum dot material as well as preparation method, quantum dot film, backlight module and display equipment

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preparation example Construction

[0047] In the first aspect, the embodiment of the present invention provides a method for preparing a quantum dot material, see figure 2 , the preparation method comprises the following steps:

[0048] Step 1, preparing a wet gel dispersed with quantum dots; the wet gel is a transparent organic polymer gel or a transparent inorganic gel, and the quantum dots are quantum dots formed by II B group elements and VI A group elements Or quantum dots formed of Group III A elements and Group V A elements.

[0049] Step 2, using a supercritical drying method or a freeze drying method to convert the wet gel into an aerogel to obtain a quantum dot material.

[0050] In the existing quantum dot film, the quantum dots are directly mixed with the matrix, but the particle size of the quantum dots is usually nanoscale, which makes the quantum dots easy to agglomerate in the matrix, making the quantum dots overlap. In the process of photoluminescence, the overlapping of quantum dots will ca...

Embodiment 1

[0082] An embodiment of the present invention provides a quantum dot material and a preparation method thereof. The quantum dot material uses resorcinol-formaldehyde airgel as a matrix to load quantum dots, and utilizes the three-dimensional network structure of resorcinol-formaldehyde 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 quantum dots, and the particle size of the quantum dots is 2-10 nm.

[0083] The preparation method of the quantum dot material provided in this embodiment is as follows:

[0084] Step 101, preparation of resorcinol-formaldehyde wet gel;

[0085] Step 1011, stirring and mixing resorcinol and formaldehyde at normal temperature, the molar ratio of resorcinol and formaldehyde is 1:2;

[0086] Step 1012, mixing the above-mentioned CdSe quantum dots with methanol, emulsifying and mixing uniformly;

[0087]Step 1013, qui...

Embodiment 2

[0095] An embodiment of the present invention provides a quantum dot material and a preparation method thereof. The quantum dot material uses resorcinol-formaldehyde airgel as a matrix to load quantum dots, and utilizes the three-dimensional network structure of resorcinol-formaldehyde 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.

[0096] The preparation method of the quantum dot material provided in this embodiment is as follows:

[0097] Step 201, preparation of resorcinol-formaldehyde wet gel;

[0098] Step 2011, stirring and mixing resorcinol and formaldehyde at normal temperature, the molar ratio of resorcinol and formaldehyde is 1:2;

[0099] Step 2012, mixing the above-mentioned CdTe quantum dots with methanol, emulsifying and mixing uniformly;

[0100] In step 2013,...

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Abstract

The invention discloses a quantum dot material as well as a preparation method, a quantum dot film, a backlight module and display equipment, and belongs to the technical field of liquid crystal display. The preparation method of the quantum dot material comprises the following steps: step a, preparing wet gel dispersed with quantum dots, wherein the wet gel is transparent organic polymer gel or transparent inorganic gel; and step b, using a supercritical drying method or a freeze drying method to convert the wet gel into aerogel to obtain the quantum dot material. By means of three-dimensional network structure of the aerogel to load quantum dots, the quantum dots are orderly and controllably dispersed in a skeleton structure of the aerogel, so as to prevent aggregation of the quantum dots and decrease overlapping ratio of the quantum dots; therefore, luminous efficiency of the quantum dot film based on the quantum dot material is increased, and thereby luminance of the backlight module is improved, and the quantum dot material is favorable for the development of high color gamut liquid crystal display equipment.

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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IPC IPC(8): C09K11/02C09K11/88B82Y20/00B82Y40/00G02F1/13357C08G8/22C08K3/30C08J9/28
CPCB82Y20/00B82Y40/00C08G8/22C08J9/28C08J2361/12C08K3/30C08K2003/3036C08K2201/003C08K2201/011C09K11/025C09K11/88C09K11/883G02F1/1336
Inventor 刘振国宋志成李富琳
Owner HISENSE VISUAL TECH CO LTD
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