Electronic paper device

Abstract

The invention discloses an electronic paper device, which comprises a common electrode layer, an electrophoresis layer, a plurality of pixel electrodes, a conductive layer, a voltage detection unit and a processing unit. Each pixel electrode is mapped to a coordinate of a coordinate system. The electrophoresis layer is positioned between and respectively electrically connected with the common electrode layer and the plurality of pixel electrodes, and a potential difference enough to drive the electrophoresis layer to display the change is formed between the common electrode layer and the conductive layer. When a user touches the electronic paper device, the common electrode layer, the electrophoresis layer and the pixel electrodes are pressed down, so that the pixel electrode corresponding to the touch position is contacted with the conductive layer and an potential difference is formed between the pixel electrode and the common electrode layer, and the corresponding region of the electrophoresis layer is driven to display a color. Meanwhile, the voltage detection unit detects the voltage of the pixel electrode to generate a touch signal to the processing unit, and the processing unit determines the touch position according to the mapping relationship. The electronic paper device also comprises a thin film transistor (TFT) matrix circuit and a driving control circuit. The electronic device can support identification or display of handwriting and touch positions.

Description

technical field [0001] The invention relates to an electronic paper device, in particular to an electrophoretic electronic paper device. Background technique [0002] Electronic paper has gradually become a widely used display device because it is very similar to ordinary paper, that is, it has properties such as high contrast, wide viewing angle, low energy consumption, and high reading comfort. [0003] In the prior art, there are electronic paper devices that realize pen-writing or handwriting input. However, most of the current handwriting input electronic paper devices can only realize the function of the drawing board, that is, when the electronic paper device is touched by a stylus or a finger, the area touched by the pen or finger will display the touch track in real time, but it cannot identify the area touched by the user. position and touch trajectory. However, when it is necessary to obtain the user's touch position to control the display of the electronic pape...

AI Technical Summary

Problems solved by technology

However, most of the current handwriting input electronic paper devices can only realize the function of the drawing board, that is, when the electronic paper device is touched by a stylus or a finger, the area touched by the pen or finger will display the touch track in real time, but it cannot identify the area touched by the user. position and touch track

However, when it is necessary to obtain the user's touch position to control the display of electronic paper, the electronic paper device that can only realize handwriting input obviously cannot meet the requirements

[0004] At present, some electronic paper devices superimpose a touch panel on the surface of the electronic paper. After the touch panel senses the user's touch, the display of the electronic paper is controlled by the processing unit. However, the refresh rate of the electronic paper is relatively slow. Detect the user's touch, and then control the change of the corresponding position display of the electronic paper according to the touch position, obviously the response time will be longer

[0005] In addition, current handwriting electronic paper devices cannot be used as ordinary displays

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