Special flexible transparent conducting film for handwriting board and flexible handwriting film based on such special flexible transparent conducting film

A technology of transparent conductive film and handwriting board, which is applied in nonlinear optics, electrical digital data processing, input/output process of data processing, etc. The effect of wide pitch distribution, simple industrial production and wide wavelength reflection spectrum

Active Publication Date: 2018-12-18
合肥微晶材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the base film and electrodes used in handwriting tablets on the market are generally PET-ITO or glass-ITO, which have the problems of poor flexibility and high interface flatness, resulting in a narrow distribution of liquid crystal pitch. According to Bragg's law of reflection, the wavelength range of reflected light is relatively Narrowing, resulting in insufficient spectral broadening for black and white display
At the same time, there are problems such as insufficient viewing angle, large increase in driving threshold voltage, and slow response time when the tablet is sold in the market. These problems are related to whether the liquid crystal molecules are evenly arranged.
The traditional rubbing alignment method has certain limitations. The liquid crystal surface after treatment has a single orientation, resulting in a narrow viewing angle and difficulty in aligning uneven substrates.
Patent CN108020961 discloses a method of using graphene film to realize liquid crystal orientation and wide viewing angle, but it is currently impossible to realize the preparation of large-scale graphene film, and the cost of graphene film is relatively high; at the same time, it uses a glass substrate, which cannot realize flexible display

Method used

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  • Special flexible transparent conducting film for handwriting board and flexible handwriting film based on such special flexible transparent conducting film
  • Special flexible transparent conducting film for handwriting board and flexible handwriting film based on such special flexible transparent conducting film
  • Special flexible transparent conducting film for handwriting board and flexible handwriting film based on such special flexible transparent conducting film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Preparation of flexible transparent conductive film: In a clean room, add 3g of water-based polyether polyol VOANOL CP 450, 3g of water-based isocyanate curing agent Bayhydur 305, 92.75g of deionized water, and 1g of dispersant hydroxyethyl cellulose in sequence Dispersion cylinder, mechanically stir; then add 0.2g nano-silver wire WJAG1 and 0.05g thin-layer graphene WJSG1410 in turn, continue stirring until uniform, and then grind and disperse to obtain conductive ink; use dimple coating process to uniform the conductive ink coated on the non-hardened surface of PET, and dried in an IR oven (110°C, 20s) to obtain a conductive layer.

[0047] Mix 99.95g of UV protection solution and 0.05g of thin-layer graphene (thin-layer graphene used is 1-3 layers, particle size D50 is 4-7μm, KNG-G2-2 of Xiamen Kaina) and spread it on the above-mentioned Conductive layer surface, and then cured by UV (500mJ / cm 2 , 10s) to form a 100nm thick protective layer to prepare a flexible...

Embodiment 2

[0055] (1) Preparation of flexible transparent conductive film: In a clean room, add 3g of water-based polyether polyol VOANOL CP 450, 3g of water-based isocyanate curing agent Bayhydur 305, 92.75g of deionized water, and 1g of dispersant hydroxyethyl cellulose in sequence Dispersion cylinder, mechanical stirring; then add 0.2g nano-silver wire WJAG1, 0.05g thin-layer graphene (thin-layer graphene used is 1-3 layers, particle size D50 is 4-7μm, KNG- G2-3), continue to stir uniformly, and then grind and disperse to obtain conductive ink; use the dimple coating process to uniformly coat the conductive ink on the non-hardened surface of PET, and dry it in an IR oven (110°C, 20s) to obtain conductive layer;

[0056] Mix 99.95g of UV protection solution and 0.05g of thin-layer graphene KNG-G2-2 uniformly and apply on the surface of the above-mentioned conductive layer, UV curing (500mJ / cm 2 , 10s) to form a 100nm thick protective layer to prepare a flexible transparent conductive ...

Embodiment 3

[0060] (1) Preparation of flexible transparent conductive film: In a clean room, add 3g of water-based polyether polyol VOANOL CP 450, 3g of water-based isocyanate curing agent Bayhydur 305, 92.75g of deionized water, and 1g of dispersant hydroxyethyl cellulose in sequence Dispersion cylinder, mechanically stir; Then add 0.2g nano-silver wire successively (the used nano-silver wire diameter is 40nm, aspect ratio 600-900, is the WJAG3 of Hefei Microcrystalline Material Technology Co., Ltd., available in the market), 0.05g Thin-layer graphene WJSG1410, continue to stir until uniform, and then grind and disperse to prepare conductive ink; use the micro-recessed coating process to uniformly coat the conductive ink on the non-hardened PET surface, and dry it in an IR oven (110°C, 20s) A conductive layer is produced.

[0061] Mix 99.95g of UV protection solution and 0.05g of thin-layer graphene (the average thickness of the thin-layer graphene used is 5nm, the particle size D50 is 5...

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Abstract

The invention discloses a special flexible transparent conducting film for a handwriting board and a flexible handwriting film based on such special flexible transparent conducting film. The flexibletransparent conducting film is formed by orderly setting a conducting layer and a protection layer on a non-hardened side of a PET film, the flexible handwriting film based on the flexible transparentconducting film is formed by taking the flexible transparent conducting film as a first electrode layer and a second electrode layer, wherein a conducting side of the first electrode layer is opposite to the conducting side of the second electrode layer and the conducting sides are adhered together through liquid crystal polymer. The flexible handwriting film provided by the invention has the characteristics of high flexibility, high contrast ratio, wide spectrum, wide view of angle, low threshold voltage, low cost, being easy to produce in a manner of large-size industrial production, and soon.

Description

technical field [0001] The invention belongs to the field of liquid crystal display, specifically relates to the application of a novel flexible conductive film in the field of liquid crystal display, and more specifically relates to a special flexible transparent conductive film for handwriting boards and a flexible handwriting film based thereon. Background technique [0002] Due to the advantages of thinness, non-fragility, bendability and even curling and folding of flexible displays, flexible displays such as electronic paper, e-books, electronic curtains, and outdoor billboards have developed rapidly in recent years, and people have higher and higher requirements for product performance. The advantages of cholesteric liquid crystal displays in terms of brightness, contrast, reflection without backlight and polarizer, and reduced display power consumption are gradually emerging, so they have gradually become the main material for such flexible display devices. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1343G06F3/041
CPCG02F1/13439G06F3/0412G06F3/0416G06F2203/04102
Inventor 张梓晗吕鹏杨锦张运奇聂彪
Owner 合肥微晶材料科技有限公司
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