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Foldable flexible cover plate and manufacturing method thereof

A flexible cover, disposable technology, applied in the direction of instruments, identification devices, etc., can solve problems such as unfavorable bending of flexible display screens, inability to protect the display screen, and easy scratching of plastic covers.

Pending Publication Date: 2020-06-09
CHENGDU TOMI SHUANG DU OPTOELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the flexible display covers of folding displays on the market are mostly made of plastic flexible materials. Although the plastic covers have good toughness and basically meet the folding requirements, due to the limitations of their mechanical properties, the plastic covers are easy to scratch and not resistant to falling. , it cannot protect the display screen very well, and it will be deformed after being folded many times and the screen is prone to defects such as ripples
However, the bendability of the conventional rigid material cover plate is poor, which is not conducive to the bending of the flexible display screen.

Method used

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  • Foldable flexible cover plate and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] An ultra-thin glass substrate with a thickness of 40 μm is provided, and the ultra-thin glass substrate is pre-cleaned, dried and pre-treated by plasma bombardment to clean one side of the ultra-thin glass substrate.

[0089] Deposition of SiO on pretreated ultra-thin glass substrates by magnetron sputtering 2 The thin film forms an adhesion-enhancing coating, specifically using a Si target in Ar+O 2 Deposition of SiO in atmospheric environment 2 film, where Ar:O 2 The volume ratio is 1:1, the deposition atmosphere pressure is 0.3Pa-1.5Pa, and the thickness of the formed adhesion-enhancing coating is 40nm.

[0090] A mixture of transparent polyamic acid and KH550 is coated on the surface of the adhesion-enhancing coating at one time, wherein polyamic acid is added to dimethylacetamide (DMAC) solvent to form a mixed solution, and KH550 is then added to the mixed solution. Wherein the polyamic acid solid content accounts for 6wt% of the final solution, and KH550 is 5wt...

Embodiment 2-5

[0095] Examples 2-5 adopt a similar preparation method as Example 1, except that the thickness of the adhesion-enhancing coating is 10 nm, 100 nm, 200 nm, and 500 nm, respectively, and the foldable flexible cover plates of Examples 2-5 are prepared.

[0096] The foldable flexible cover of Examples 1-5 is tested in the following two aspects: 1) Hundred-grid test: that is, use a hundred-grid knife to directly scratch the foldable flexible cover, and then use adhesive tape to bond and tear the film. The adhesion performance is evaluated by the release of the film after tearing off the film. Specifically, the B value is used to express the result. The larger the B value, the better the adhesion performance; 2) Bending performance test: 90mm*60mm passing edges are provided The processed and strengthened foldable flexible cover plate is subjected to a bending test, and the transmittance ΔT at the bending place is measured after bending for the same number of times. The smaller the ΔT...

Embodiment 2

[0099] Example 2: Between 4B-5B, there is a slight release on the edge of the grid; ΔT=1.8%;

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Abstract

The invention discloses a foldable flexible cover plate and a manufacturing method thereof. The foldable flexible cover plate comprises an ultrathin glass substrate, and an adhesion enhancing platinglayer, a high polymer material layer and a ceramic functional layer which are sequentially stacked on the ultrathin glass substrate, wherein the high polymer material layer is formed by coating and baking a mixture at least consisting of transparent polyamide acid and a coupling agent at one time. The manufacturing method comprises the following steps: providing an ultrathin glass substrate, and forming an adhesion enhancing plating layer on the surface of one side of the ultrathin glass substrate; coating the surface of the adhesion enhancing plating layer with the mixture at least consistingof transparent polyamic acid and a coupling agent, and then carrying out baking-curing reaction to form a high polymer material layer at least consisting of transparent polyimide; and forming a ceramic functional layer on the high polymer material layer to obtain the foldable flexible cover plate. According to the invention, the foldable flexible cover plate with stronger mechanical property andgood bending property can be prepared.

Description

technical field [0001] The invention belongs to the technical field of electronic display, and more specifically relates to a foldable flexible cover and a manufacturing method thereof. Background technique [0002] With the development of display technology, the application fields of display devices are very extensive, and the requirements for various performances of the screen are gradually increasing. The flexible screen has the characteristics of being bendable. By utilizing the flexibility of the display device, people can bend or fold the display device, thereby bringing convenience to people to carry and use the display device. [0003] At present, the flexible display covers of folding displays on the market are mostly made of plastic flexible materials. Although the plastic covers have good toughness and basically meet the folding requirements, due to the limitations of their mechanical properties, the plastic covers are easy to scratch and not resistant to falling....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F9/30
CPCG09F9/301
Inventor 李福生张锡强詹勇军李欢乐
Owner CHENGDU TOMI SHUANG DU OPTOELECTRONICS CO LTD
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