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Flexible electronic paper and preparation and application thereof

A kind of electronic paper and flexible technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of large overall thickness, small bending range, air bubbles, etc., and achieve the effect of reducing thickness, reducing cohesion, and improving flexibility

Pending Publication Date: 2022-01-21
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a flexible electronic paper and its preparation and application to solve the problems of pits, bubbles, warping, etc. In terms of flexibility, the bending range is small, the overall thickness is large, and the preparation of flexible electronic paper with a bending radius equal to or less than 2cm is realized. The flexible electronic paper of the present invention can be better applied to smart wearable products (watches / bracelets) Fields that require flexible screens

Method used

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  • Flexible electronic paper and preparation and application thereof
  • Flexible electronic paper and preparation and application thereof
  • Flexible electronic paper and preparation and application thereof

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preparation example Construction

[0052] The preparation method of the flexible electronic paper provided by the present invention comprises the following steps:

[0053] S1. Particles with a diameter of 200nm±20nm are screened out by a rotary wheel as color-developing particles.

[0054] S2. Put the chromogenic particles into the capsule solution, adjust the rotation speed of the runner to 200-300 rpm, and screen out electrophoretic display microcapsules with a particle size of 20 μm-30 μm.

[0055] S3. Inject the electrophoretic display microcapsules into the transparent conductive electrode to form a color-developing FPL (electronic paper ink film);

[0056] S4. Cut the color-developing FPL (electronic paper ink film) to the required size to prepare flexible electronic paper (EPD), including the following steps: glass cutting, FPL attachment, IC Bonding, FPC Bonding, PS attachment, PI separation , FPC serves as a bridge connecting the flexible electronic paper (EPD) and the motherboard. combine figure 2...

Embodiment 1

[0068] In order to achieve better flexibility, this embodiment optimizes and screens the particle size and shape of the chromogenic particles in the FPL and the electrophoretic display microcapsules.

[0069] The size of the chromogenic particles used in the FPL in the current flexible electronic paper is generally 200-300 nm, and the microcapsules displayed by electrophoresis are 50-100 μm.

[0070] In order to achieve better flexibility, faster refresh rate and better display effect, in this embodiment, the chromogenic particles are miniaturized and the electrophoretic display microcapsules are modified.

[0071] The size of the chromogenic particles is adjusted to about 200nm, and the particles of 200nm±20nm are specifically selected as chromogenic particles to enhance display clarity and improve uniformity. At the same time, the electrophoretic display microcapsules in the present invention are designed with spheres to increase the bending degree of the capsules. At the sa...

Embodiment 2

[0073] For the PS film, in this embodiment, the verification design is carried out for thinner materials, the thickness of the PS film is reduced from 256 μm to 125 μm, and the combination verification is carried out.

[0074] Experiments have proved that the PS film with a thickness of 125 μm can reduce the thickness of flexible electronic paper and increase its flexibility, while having no adverse effects on other materials, and can also play a protective role. Therefore, in order to improve the flexibility of the flexible electronic paper and ensure the protection effect, the present invention controls the thickness of the PS film within the range of 120-130 μm.

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Abstract

The invention particularly discloses flexible electronic paper as well as preparation and application thereof. The flexible electronic paper sequentially comprises a PS film, a color developing FPL, a PI film and a PS film from bottom to top, and further comprises an IC and an FPC. The IC and the FPC are respectively fixed on the PI film through an IC reinforcing adhesive and a UV adhesive, and the flexible printed circuit board is characterized in that the PS film is attached to the FPL and the PI film through a hot melting process, and the FPL and the PI film are attached together through an EC adhesive. The particle size of the microcapsule is displayed by controlling developing particles and electrophoresis; arabic gum, transparent gum and chitosan in a certain proportion are matched in a capsule solution, and the material characteristics of the flexible electronic paper are improved by controlling the material selection of a PI film, the thickness of a PS film and the hardness and tensile modulus of EC glue; meanwhile, in cooperation with a new preparation process, the flexibility, bending performance and definition of the flexible electronic paper are improved, and flexible display with the bending radius equal to or smaller than 2 cm is achieved.

Description

technical field [0001] The invention relates to the technical fields of preparation and display of flexible electronic paper, in particular to a flexible electronic paper and its preparation and application. Background technique [0002] With the rapid development of IoT technology, the IoT ecosystem has been basically formed. Bistable electronic paper-related products, such as electronic tags, electronic table cards, electronic badges, electronic door plates, electronic bus stop signs, electronic bedside cards, electronic infusion cards and other electronic paper-related products have been applied to all aspects of life. However, due to the influence of glass lines, the e-paper products currently on the market are easily broken and cannot be bent, which limits the application of e-paper low-power consumption products in To C services such as smart wear. Therefore, in order to expand the application scenarios of low-power electronic paper products, for the design of electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1675G02F1/16757
CPCG02F1/1675G02F1/16757
Inventor 杨勇袁家虎崔月华程前庚谢云燕史良慧
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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