Design of Driving Waveform for Shortening Response Time of Black Particles and White Particles in Three-Color Electrophoretic Displays

Micromachines

卷:12

Yunfeng Hu¹  Zichuan Yi¹  Wenjun Zeng¹  Liming Liu¹  Weibiao Zhou¹  Chongfu Zhang¹  Feng Chi¹  Simin Ma¹  Shaoning Deng¹  Hu Zhang²  Li Wang³  Jitao Zhang⁴ 

[1] College of Eletron and Information，University of Electronic Science and Technology of China，Zhongshan Institute，Zhongshan 528402，China;

[2] School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu 611731, China;

[3] School of Information Engineering, Zhongshan Polytechnic, Zhongshan 528400, China;

[4] School of Mechanical and Electrical Engineering, Zhongshan Polytechnic, Zhongshan 528400, China;

关键词: three-color electrophoretic displays;    driving waveform;    response time;    black particle;    white particle;    reference grayscale;   

DOI  :  10.3390/mi12111306

来源: DOAJ

【 摘 要 】

The shortage of color in traditional electrophoretic displays (EPDs) can be compensated by three-color EPDs. However, the response time of black particles and white particles is increased. A new driving waveform based on the principle of three-color EPDs and electrophoresis theory was proposed to shorten the response time of black particles and white particles. The proposed driving waveform consisted of an erasing stage, an activation stage, a red driving stage, and a white or a black driving stage. The activation stage was mainly optimized in this paper. Firstly, the motion characteristics of the particles were analyzed using Stokes law and electrophoresis theory. Secondly, an optimal high frequency oscillation voltage was tested in order to improve the activity of the particles. Then, the influence of oscillation period and oscillation times on the activation stage were analyzed for optimizing the reference grayscale. According to the luminance of pixels, an oscillation period of 30 ms and an oscillation time of 30 were determined. The experimental results showed that the response time of black particles was shortened by 45%, and the response time of white particles was shortened by 40% compared with a traditional driving waveform.

【 授权许可】

Unknown