Method for improving packaging performance of electrowetting device and electrowetting device

Abstract

The invention discloses a method for improving the packaging performance of an electrowetting device and the electrowetting device. A layer of attaching material good in hydrophobicity is arranged on the surfaces of pixel walls of a packaging attaching area, the problems that when a high-hydrophilic material is adopted to prepare the pixel walls to avoid the ink jumping phenomenon, the attaching performance of a rubber frame and the pixel walls is poor, and the packaging sealing performance is not good can be solved, an obtained packaging device is more reliable in quality, ink jumping is avoided, and the packaging sealing performance is guaranteed. Furthermore, the attaching material can cover the intersection of the longitudinal pixel walls and the transverse pixel walls, supporting columns are formed, and a series of display problems caused when base plates are bent due to gravity or stress are prevented. The method is simple in technology, low in cost and easy to control, and the obtained electrowetting device has superior packaging performance.

Description

Technical field [0001] The invention relates to electrowetting technology, in particular to a method for improving the packaging performance of an electrowetting device and an electrowetting device obtained therefrom. Background technique [0002] An electrowetting device generally includes two substrates, one of which is provided with a plastic frame on the surface, and the other substrate is provided with a pixel wall arranged in a matrix. The two substrates are bonded by the plastic frame and the surface of the pixel wall. , The package forms a closed chamber, where the closed chamber contains a non-conductive first fluid (alkanes, etc.) and a conductive second fluid (water or salt solution), and the fluids are in contact with each other and are immiscible. [0003] The pixel wall is usually a patterned structure obtained through a photolithography process, and the pixel grid area enclosed by the pixel wall is the display area, and the electrowetting display device produces a di...

AI Technical Summary

Problems solved by technology

[0006] The plastic frame is generally made of pressure-sensitive adhesive (PSA) material. Because the sealed chamber is mainly water or salt solution, in order to prevent the hydrophilic group of the plastic frame from interacting with water, the plastic frame is mostly made of hydrophobic Pressure-sensitive adhesive preparation, such as polyacrylate, polyisobutylene, etc., the contact angle of water droplets on the surface is generally ≥ 90°, so when the surface of the pixel wall is too hydrophilic, it is difficult to bond the plastic frame and the pixel wall tightly, resulting in poor device packaging performance , easy to cause ink leakage, that is, the liquid in the closed chamber flows out, or the external pollutants enter, thereby reducing the life and output of the device

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