Subtractive color mixture electrophoretype type display device and manufacturing method thereof

Abstract

The invention discloses a subtractive color mixture electrophoretype type display device and a manufacturing method thereof. The display device comprises a pixel array, a first base plate, a second base plate, at least three public electrodes and a display electrode array, wherein the pixel array is provided with a plurality of pixel units; the first base plate and the second base plate are in opposite arrangement; the at least three public electrodes are formed on the lower surface of the first base plate; the display electrode array is formed on the upper surface of the second base plate; each display electrode and the at least three public electrodes correspondingly form a driving electrode of each pixel unit; each pixel unit comprises a micro cup layer arranged between the display electrode and the public electrode; the micro cup layer comprises at least one micro cup structure; when a plurality of micro cup structures are used, the plurality of micro cup structures are formed by micro cup walls; a display medium is arranged in the micro cup structure, and comprises electrophoretic ink and charged particles dispersed in the electrophoretic ink. The high-brightness color display of various colors can be realized; the refreshing efficiency is improved; the display stability and the high-brightness color reoccurrence are ensured.

Description

technical field [0001] The invention relates to an electrophoretic display device, in particular to a subtractive color mixing electrophoretic display device and a manufacturing method thereof. Background technique [0002] The principle of an electrophoretic display device (Electrophoretic Display; EPD) is to display images by using a direct current electric field to make charged pigment particles move in a directional manner. The basic structure of an electrophoretic display device is to fill a display medium layer between two electrodes, which is composed of a certain thickness and a certain amount of charged pigment particles and electrophoretic liquid; in order to prevent the agglomeration of charged particles, the display medium layer is divided into a large number of micro A substructure of cups or microcapsules, forming microcup or microcapsule layers. When a voltage is applied across the two electrodes to form an electric field, the particles will move along or aga...

AI Technical Summary

Problems solved by technology

This color picture realization method has the problem of low color reproduction efficiency of the color filter film, which makes the electrophoretic display device affected in terms of light color saturation and brightness performance.

In addition, color display can also be realized by using particles of various colors, but there is a problem that it is difficult to control the movement characteristics of various charged pigment particles.

The electrophoretic speed will have different behaviors depending on the type, particle size and concentration of charged particles, the strength, distribution and direction of the applied electric field, and the type of electrophoretic fluid (electrophoretic fluid). Therefore, it is difficult to control the trajectory of particles. It is not easy to realize a stable color display device

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