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Blue light cut-off filter film and application thereof

A cut-off filter and blue light technology, applied in the field of materials, can solve problems such as cumbersome processes, color deviation, and increased manufacturing costs, and achieve high color rendering, high peak transmittance, and healthy display effects

Pending Publication Date: 2021-04-13
ZHIJING NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The harmful blue light band that can be exposed to in life is 415nm-455nm. At present, people have developed many technologies to prevent blue light damage. Using anti-blue light protective film is one of them, and most blue light protective films are coated with vacuum coating method. Layers of different refractive index films or adding high-concentration yellow-based blue light absorbers, the method of coating multiple layers of different refractive index films by vacuum coating method will make the process too cumbersome, and the manufacturing cost will increase; the method of adding yellow-based blue light absorbers It will cause color deviation, reduce the display quality of electronic products, and affect the user's experience of using the product

Method used

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  • Blue light cut-off filter film and application thereof
  • Blue light cut-off filter film and application thereof
  • Blue light cut-off filter film and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0116] (1) Dissolve the polymer in an organic solvent, control the polymer: organic solvent mass ratio = 1:15, and stir mechanically for not less than 6 hours, so that the polymer is completely dissolved in the organic solvent to obtain a clear and transparent solution. This solution is formazan solution. The polymer is polymethyl methacrylate (PMMA); the organic solvent is N,N-dimethylformamide (DMF).

[0117] (2) MABr powder, BiBr 3 Powder mixing, control the molar ratio: BiBr 3 : MABr=7:10, add organic solvent, control mass ratio is: organic solvent: (BiBr 3 +MABr)=1:0.045, mechanically stirred for 6 hours after mixing to obtain a clear and transparent solution, which is B solution. The organic solvent described in this step is N,N-dimethylformamide (DMF).

[0118] (3) The first solution described in step (1) is mixed with the second solution described in step (2), and the mass ratio is controlled to be: first solution: second solution=1:0.5, and mechanically stirred fo...

Embodiment 2

[0123] The specific operation is the same as in Example 1, except that the polymer in step (1) is polyvinylidene fluoride (PVDF), and the anti-blue light cut-off filter film F-2 based on perovskite quantum dots is obtained.

Embodiment 3

[0125] The specific operation is the same as in Example 1, the difference is that in step (3), the mass ratio of solution A: solution B is 2:1, and the anti-blue light cut-off filter film F-3 based on perovskite quantum dots is obtained.

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Abstract

The invention discloses a blue light cut-off filter film. The blue light cut-off filter film comprises perovskite quantum dots and a substrate; and the central wavelength of the blue light cut-off filter film is 400-480nm. The cut-off depth T of the cut-off filter film is less than 0.1%, and the peak transmittance is high. By adjusting the crystal form and the size of the perovskite crystal form quantum dot, the absorption center wavelength of the filter film can be adjusted within the range of 400 nm and 480 nm. Using the cut-off filter film, a harmful blue light portion (< 455 nm) is filtered out without reducing the intensity of healthy blue light, so that healthy and high-color-rendering-property display is achieved at the same time.

Description

technical field [0001] The application relates to a blue light cut-off filter film based on perovskite quantum dots, which belongs to the field of materials. Background technique [0002] Liquid crystal display technology (LCD) began to replace picture tube technology and entered the display field in the 1990s. With the development of technology and the progress of LCD panel manufacturing technology, the application scenarios of LCD products are gradually developing from small-size screens to large-size screens. In the process of LCD technology development, the technical change of the backlight source is an important milestone. In 2003, the European Union announced the implementation of the "Restriction of the Use of Certain Hazardous Substances (RoHS) in Electrical and Electronic Equipment" directive from 2006, and the cold cathode lamp (CCFL) backlight technology began to withdraw from the market and was replaced by light-emitting diode (LED) backlight display technology...

Claims

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Application Information

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IPC IPC(8): G02B5/20G02F1/1335G02F1/13357
CPCG02B5/20G02F1/133514G02F1/133605G02F1/133606
Inventor 李飞钟海政王晶晶柏泽龙
Owner ZHIJING NANOTECH CO LTD