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Patterned flexible electrode and preparation method, flexible display device

A flexible electrode, patterned technology, applied in circuits, electrical components, electrical solid devices, etc., can solve problems affecting product quality and life, electrode damage, depletion of microsphere wraps, etc., to improve flexural resistance and Product life, ensure the uniformity of light emission, and improve the effect of product competitiveness

Active Publication Date: 2020-03-06
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a display device for wearable display, it needs to be bent and deflected multiple times, which will damage the electrodes, resulting in display mura, affecting product quality and lifespan
[0003] At present, most of the flexible display electrode materials in the industry are nano-silver wires and other materials, and the problem of repair after fracture has not been effectively solved, and the problem of dynamic repair has not been considered.
In addition, self-healing electrodes generally use the method of microsphere-wrapped metal, which is slowly released by some kind of stimulation during use, but it is easy to cause a short circuit due to the rupture of the microspheres during application, and the uncertainty of the stimulus value will lead to microsphere wrapping. run out

Method used

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  • Patterned flexible electrode and preparation method, flexible display device
  • Patterned flexible electrode and preparation method, flexible display device
  • Patterned flexible electrode and preparation method, flexible display device

Examples

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preparation example Construction

[0059] According to another aspect of the present invention, a method for preparing a patterned flexible electrode is provided, comprising the following steps:

[0060] (1) connecting long-chain polymers on the surface of micro-metal particles;

[0061] (2) The surface of the fiber is coated with organic molecules;

[0062] (3) Mixing the fine metal particles treated in step (1), the fibers treated in step (2) and the metal electrode material slurry to obtain a flexible electrode material, wherein the organic molecule and the long-chain polymer pass hydrogen bond connection, the fiber wraps the micro metal particles;

[0063] (4) Patterning the flexible electrode slurry to obtain the patterned flexible electrode.

[0064] According to one embodiment of the present invention, in step (2), the fibers and the organic molecules are mixed in a mass ratio of (4-5):1.

[0065] According to one embodiment of the present invention, the organic molecule is 4-vinylpyridine; the long-c...

preparation Embodiment 1

[0067] In this embodiment, the preparation method of the flexible electrode comprises the following steps:

[0068] a. Dissolve 1mol m-phenylalkyl anhydride in an organic solvent (such as acetone, methanol, ethanol, etc.), add 2mol alkyl hydrazine solution, mix well, stir in an ice-water bath, and quickly add powdered micro-metal particles (such as micro-silver, micro-nickel, etc.); after 20 minutes of reaction, transfer the above mixed solution to a 60°C water bath to continue the reaction until the end, and obtain a viscous liquid, which is a micro-metal particle with a long-chain polymer attached to the surface; The reaction formula of the reaction of an acid anhydride with an alkyl hydrazine to generate a long-chain polymer is as follows image 3 shown. One of the amino groups of the alkyl hydrazine reacts with the m-phenylene anhydride to form an amide bond, and the other amino group can continue to react with the anhydride to form a polymer.

[0069] b. Add 4-picoline,...

preparation Embodiment 2

[0076] The flexible electrode of this embodiment is prepared according to a method similar to that of Preparation Example 2, wherein the organic molecule is selected from isocyanate; the long-chain polymer is a long chain polymers; long chain polymers are hydrogen bonded to the isocyanate.

[0077] According to yet another aspect of the present invention, a flexible display device is provided, comprising the above-mentioned patterned flexible electrode and the patterned flexible electrode obtained by the above-mentioned preparation method.

[0078] According to an embodiment of the present invention, the patterned flexible electrode is used as a cathode electrode layer of a flexible display.

[0079] The flexible display device according to the present invention also includes an electron transport layer, a light emitting layer, a hole transport layer, and a flexible transparent anode. According to the flexible display device of the present invention such as Figure 5 shown. ...

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Abstract

The invention relates to the field of display technology, in particular to a patterned flexible electrode, a preparation method, and a flexible display device. The flexible electrode includes a patterned line, the patterned line includes metal electrode materials, and also includes fibers and micro-metal particles, the surface of the micro-metal particles is connected with a long-chain polymer, and the surface of the fiber is coated with organic molecule, the organic molecule is connected to the long-chain polymer through hydrogen bonds, and the fiber wraps the micro-metal particle. The patterned flexible electrode of the present invention has dynamic self-repair ability. After being applied to a flexible display device, it can dynamically repair bending fatigue damage when the circuit is broken, quickly restore the path, eliminate display defects, ensure uniformity of light emission, and improve flexural resistance and product life.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a patterned flexible electrode, a preparation method, and a flexible display device. Background technique [0002] Flexible display QLED (Quantum Dot Light Emitting Diode) or OLED technology, as the future display technology, has the advantages of high brightness, fast response, wide color gamut, better HDR effect, etc. Flexible QLED is considered to be the ultimate in next-generation quantum display technology form. Flexible display technology has the advantages of strong portability and rich application scenarios. As a display device for a wearable display, it needs to be bent and flexed many times, which will damage the electrodes, resulting in display mura, affecting product quality and lifespan. [0003] At present, most flexible display electrode materials in the industry are nano-silver wires and other materials, and the problem of repair after fracture has not been eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/52H01L51/56
CPCH10K50/805H10K50/82H10K71/00H10K2102/311
Inventor 刘振国宋志成刘卫东
Owner HISENSE VISUAL TECH CO LTD
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