Design of Driving Waveform for Shortening Response Time of Black Particles and White Particles in Three-Color Electrophoretic Displays
Hu Zhang,
Zichuan Yi,
Simin Ma,
Shaoning Deng,
Weibiao Zhou,
Wenjun Zeng,
Liming Liu,
Feng Chi,
Yunfeng Hu,
Chongfu Zhang,
Li Wang,
Jitao Zhang
Affiliations
Hu Zhang
School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu 611731, China
Zichuan Yi
College of Eletron and Information，University of Electronic Science and Technology of China，Zhongshan Institute，Zhongshan 528402，China
Simin Ma
College of Eletron and Information，University of Electronic Science and Technology of China，Zhongshan Institute，Zhongshan 528402，China
Shaoning Deng
College of Eletron and Information，University of Electronic Science and Technology of China，Zhongshan Institute，Zhongshan 528402，China
Weibiao Zhou
College of Eletron and Information，University of Electronic Science and Technology of China，Zhongshan Institute，Zhongshan 528402，China
Wenjun Zeng
College of Eletron and Information，University of Electronic Science and Technology of China，Zhongshan Institute，Zhongshan 528402，China
Liming Liu
College of Eletron and Information，University of Electronic Science and Technology of China，Zhongshan Institute，Zhongshan 528402，China
Feng Chi
College of Eletron and Information，University of Electronic Science and Technology of China，Zhongshan Institute，Zhongshan 528402，China
Yunfeng Hu
College of Eletron and Information，University of Electronic Science and Technology of China，Zhongshan Institute，Zhongshan 528402，China
Chongfu Zhang
College of Eletron and Information，University of Electronic Science and Technology of China，Zhongshan Institute，Zhongshan 528402，China
Li Wang
School of Information Engineering, Zhongshan Polytechnic, Zhongshan 528400, China
Jitao Zhang
School of Mechanical and Electrical Engineering, Zhongshan Polytechnic, Zhongshan 528400, China
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.
