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Fluorescent film for backlight module and manufacturing method of fluorescent film

A backlight module and fluorescence technology, which is applied in optics, nonlinear optics, instruments, etc., can solve the problems of quantum dot luminous efficiency quenching, reduce the high color gamut and stability of quantum dot film display, and improve luminous efficiency And stability, improve luminous stability, improve the effect of brightness

Pending Publication Date: 2016-10-26
CHANGZHOU HUAWEI ADVANCED MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of preparing quantum dot films, the general method is to directly mix quantum dots with adhesives. As time goes by, these adhesives will have an impact on the quenching of quantum dot luminous efficiency, thereby reducing the display capacity of quantum dot films. High color gamut and stability of the screen

Method used

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  • Fluorescent film for backlight module and manufacturing method of fluorescent film
  • Fluorescent film for backlight module and manufacturing method of fluorescent film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 0.1g of red CdS quantum dots with a particle size of 5nm, and add 0.9g of green CdTe quantum dots with a particle size of 1nm into a saturated solution containing 4.0g of sodium chloride for recrystallization to obtain mixed crystals of quantum dots. Grind to obtain mixed crystals with a particle size of 10 nm. Weigh 0.5g of quantum dot mixed crystals, add 3.5g of polystyrene diffusion particles with a particle size of 3μm to 96.0g of acrylic resin and mix thoroughly, and then coat the upper surface of the barrier film layer with a thickness of 30μm. The upper surface is compounded with an upper barrier film layer, and cured by ultraviolet light to obtain a fluorescent film with a thickness of 100 μm.

[0024] Such as figure 1 Shown is the structural diagram of the fluorescent film prepared by the above method. Described fluorescent film comprises barrier film layer one 1, barrier film layer two 2 and quantum dot layer 3, and quantum dot layer 3 is arranged betw...

Embodiment 2

[0026] Weigh 0.5g of red CdSe / ZnS quantum dots with a particle size of 9nm, and add 0.5g of green InP quantum dots with a particle size of 4nm into a saturated solution containing 9.0g of sodium citrate for recrystallization to obtain mixed crystals of quantum dots. Fully grind to obtain mixed crystals with a particle size of 40nm. Weigh 10.0g of quantum dot mixed crystals, add 5.0g of titanium dioxide diffusion particles with a particle size of 35μm into 85.0g of polyurethane resin and mix thoroughly, and then apply it on the upper surface of the barrier film layer with a thickness of 100μm. Composite the upper barrier film layer, and UV-cured to obtain a fluorescent film with a thickness of 300 μm.

[0027] The structure of the fluorescent film prepared by the above method is as follows: figure 1 shown.

Embodiment 3

[0029] Weigh 0.6g of red CdSe / ZnS quantum dots with a particle size of 7nm, and add 2.4g of green CdSe / ZnS quantum dots with a particle size of 3nm into a saturated solution containing 17.0 mg of magnesium sulfate for recrystallization to obtain quantum dot mixed crystals , fully ground to obtain mixed crystals with a particle size of 20nm. Weigh 2.0g of quantum dot mixed crystals, add 12.0g of polymethyl methacrylate diffusion particles with a particle size of 10 μm to 86.0 g of polystyrene resin and mix thoroughly, and then apply it on the upper surface of the barrier film layer with a thickness of 50 μm. The upper surface of the quantum dot coating solution is compounded with an upper barrier film layer, and cured by ultraviolet light to obtain a fluorescent film with a thickness of 200 μm.

[0030] The structure of the fluorescent film prepared by the above method is as follows: figure 1 shown.

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Abstract

The invention belongs to the technical field of backlight modules, and particularly relates to a fluorescent film for a backlight module and a manufacturing method of the fluorescent film. The manufacturing method includes the steps of (1), subjecting quantum dots and supersaturated saline solution to cocrystallization to form quantum-dot mixed crystal and grinding the quantum-dot mixed crystal completely; (2), adding adhesive into the quantum-dot mixed crystal while mixing uniformly and then adding in diffused particles while mixing uniformly to obtain a coating liquid for forming a quantum-dot layer; (3), coating a barrier film layer with the coating liquid for forming the quantum-dot layer to form a quantum-dot layer material; (4), laminating the other barrier film layer on the quantum-dot layer material to form a sandwich structure, and subjecting the sandwich structure to ultraviolet curing to obtain the fluorescent film. The fluorescent film manufactured by the method substitutes for a diffusion barrier of the conventional backlight module, improves color saturation and color gamut of the liquid crystal display greatly, and further can increase brightness and reduce power consumption.

Description

technical field [0001] The invention belongs to the technical field of backlight modules, and in particular relates to a fluorescent film used in a backlight module and a preparation method thereof. Background technique [0002] With the continuous development of display technology, people have higher and higher requirements for display quality of display devices. Currently, the LCD TVs on the market can display a color gamut between 68% and 72% NTSC (National Television Standards Committee), so they cannot provide high-quality color effects. In order to improve the performance color gamut of LCD TVs, high color gamut backlight technology is becoming the focus of research in the industry. [0003] Quantum dot film is an optical film used in liquid crystal display backlight modules to replace diffusion films. Compared with ordinary white LEDs, the backlight module using blue LEDs combined with quantum dot film can significantly improve the color saturation of liquid crystal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357
CPCG02F1/1336G02F1/133614
Inventor 颜奇旭张万超陈凯
Owner CHANGZHOU HUAWEI ADVANCED MATERIAL
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