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Quantum dot material and preparation method, quantum dot membrane, backlight module and display equipment

A technology of quantum dot material and preset temperature, applied in luminescent materials, chemical instruments and methods, optics, etc., can solve problems such as affecting the display effect of liquid crystal display devices, low luminous efficiency of quantum dot films, uneven dispersion of quantum dots, etc. Achieve the effect of reducing the overlap rate, promoting development and improving luminous efficiency

Active Publication Date: 2017-02-08
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 there are at least the following problems in the prior art: in the existing quantum dot film, the quantum dots are not uniformly dispersed, and agglomeration easily occurs, which makes the luminous efficiency of the quantum dot film relatively low, thus Affect the brightness of the backlight module, thereby affecting the display effect of the liquid crystal display device

Method used

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  • Quantum dot material and preparation method, quantum dot membrane, backlight module and display equipment
  • Quantum dot material and preparation method, quantum dot membrane, backlight module and display equipment
  • Quantum dot material and preparation method, quantum dot membrane, backlight module and display equipment

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preparation example Construction

[0042] 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:

[0043] Step 1: Add the acetate of group II B elements to the polyether ketone solution with carboxyl side groups, stir and mix evenly under the protection of inert gas; the group II B elements are cadmium or zinc.

[0044] Step 2, heating the temperature of the reaction system obtained in step 1 to a preset temperature.

[0045] Step 3, adding selenourea or thiourea to the reaction system obtained in step 2, and detecting the luminescence wavelength of the reaction system, when the luminescence wavelength of the reaction system reaches a preset wavelength, the quantum dot material is obtained.

[0046] In the existing quantum dot film, the quantum dots are directly mixed with the polymer matrix, but the quantum dots are inorganic and their particle size is usually nanoscale, while the...

Embodiment 1

[0081] This embodiment provides a quantum dot material and a preparation method thereof. The quantum dot material uses a fully aromatic polyaryl ether ketone having carboxyl side groups represented by formula (II) as a polymer matrix, and utilizes the coordination of carboxyl side groups In-situ growth of CdSe quantum dots by in-situ interaction, controlling the distribution of CdSe quantum dots, making CdSe quantum dots uniformly dispersed in the polymer matrix, preventing CdSe quantum dots from agglomerating, and at the same time, the fully aromatic polyaryl ether ketone shown in formula (II) With high crystallinity, high density, high stiffness and good high temperature resistance, it can protect CdSe quantum dots and prevent CdSe quantum dots from failing due to water and oxygen contact.

[0082]

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

[0084] Step 101, first prepare the wholly aromatic polyaryl ether keton...

Embodiment 2

[0099] This embodiment provides a quantum dot material and a preparation method thereof. The quantum dot material uses the fully aromatic polyaryletherketone having carboxyl side groups shown in the formula (II) in Example 1 as a polymer matrix, and utilizes the carboxyl side CdSe quantum dots are grown in situ by the coordination of the group, the distribution of the CdSe quantum dots is controlled, the CdSe quantum dots are uniformly dispersed in the polymer matrix, and the CdSe quantum dots are prevented from agglomerating. Aryl ether ketone has high crystallinity, high density, high stiffness and good high temperature resistance, which can protect CdSe quantum dots and prevent CdSe quantum dots from failing due to water and oxygen contact.

[0100] The preparation method of the quantum dot material provided in this embodiment is as follows:

[0101] Step 201, first prepare the wholly aromatic polyaryl ether ketone shown in the above formula (II), specifically as follows: ...

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Abstract

The invention discloses a quantum dot material and a preparation method, a quantum dot membrane, a backlight module and display equipment, belonging to the technical field of liquid crystal display. The preparation method of the quantum dot material comprises the following steps: (a) adding acetate of IIB-group element into a polyether ketone solution with side carboxyl, and stirring and mixing uniformly under the protection of inert gas, wherein the IIB-group element is cadmium or zinc; (b) heating the reaction system obtained in the step (a) to a preset temperature; and (c) adding selenourea or thiourea into the reaction system obtained in the step (b), and detecting the light wavelength of the reaction system, wherein the quantum dot material is obtained when the light wavelength of the reaction system reaches the preset wavelength. The growth of quantum dots is controlled by use of the coordination effect of carboxyl, then the quantum dots are uniformly dispersed in a polymer matrix, the luminous efficiency of the quantum dot membrane based on the quantum dot material is improved, the brightness of the backlight module is enhanced, and the development of high-gamut liquid crystal display equipment is facilitated.

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): C08L71/00C08K5/098C08K5/405C08K5/36C08G65/40C09K11/02C09K11/88G02F1/13357
CPCC08G65/4025C08K5/098C08K5/36C08K5/405C09K11/025C09K11/883G02F1/1336G02F1/133614C08L71/00
Inventor 刘振国宋志成李富琳
Owner HISENSE VISUAL TECH CO LTD
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