Optimized Driving Scheme for Three-Color Electrophoretic Displays Based on the Elimination of Red Ghost Images

Mouhua Jiang; Zichuan Yi; Jiashuai Wang; Feng Li; Boyuan Lai; Liangyu Li; Li Wang; Liming Liu; Feng Chi; Guofu Zhou

doi:10.3390/mi15101260

Micromachines (Oct 2024)

Optimized Driving Scheme for Three-Color Electrophoretic Displays Based on the Elimination of Red Ghost Images

Mouhua Jiang,
Zichuan Yi,
Jiashuai Wang,
Feng Li,
Boyuan Lai,
Liangyu Li,
Li Wang,
Liming Liu,
Feng Chi,
Guofu Zhou

Affiliations

Mouhua Jiang: School of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China
Zichuan Yi: School of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China
Jiashuai Wang: School of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China
Feng Li: School of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China
Boyuan Lai: School of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China
Liangyu Li: School of Information Engineering, Zhongshan Polytechnic, Zhongshan 528400, China
Li Wang: School of Information Engineering, Zhongshan Polytechnic, Zhongshan 528400, China
Liming Liu: School of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China
Feng Chi: School of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China
Guofu Zhou: Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China

DOI: https://doi.org/10.3390/mi15101260
Journal volume & issue: Vol. 15, no. 10
p. 1260

Abstract

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Three-color electrophoretic display (EPD) is emerging as a display technology due to its extremely low energy consumption and excellent reflective properties. However, in the process of black and white color image transition, due to the different driving characteristics of red particles, the particles within the three-color EPD cannot be ideally driven to the target position, resulting in the appearance of a red ghost image. For this reason, this study utilized the COMSOL 5.6 finite element simulation method to construct a three-dimensional simulation model to explore the motion characteristics of electrophoretic particles, and then proposed a new driving scheme. The driving scheme aimed to drive red particles to the target position and eliminate the red ghost image by optimizing the pixel erasing stage and employing a high-frequency oscillating voltage. The final experimental results showed that after adopting the proposed driving scheme, the red ghost image was reduced by 8.57% and the brightness of the white color image was increased by 17.50%. This method effectively improved the display performance of three-color EPDs and contributed to the better application of three-color EPDs in the field of high-reflectivity and high-quality display.

Published in Micromachines

ISSN: 2072-666X (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Mechanical engineering and machinery
Website: https://www.mdpi.com/journal/micromachines

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