Red Display for Three-Color Electrophoretic Displays with High Saturation via a Separation Stage between Black and Red Particles

Linwei Liu; Wenjun Zeng; Zhengxing Long; Zichuan Yi; Pengfei Bai; Biao Tang; Dong Yuan; Guofu Zhou

doi:10.3390/ma15072555

Materials (Mar 2022)

Red Display for Three-Color Electrophoretic Displays with High Saturation via a Separation Stage between Black and Red Particles

Linwei Liu,
Wenjun Zeng,
Zhengxing Long,
Zichuan Yi,
Pengfei Bai,
Biao Tang,
Dong Yuan,
Guofu Zhou

Affiliations

Linwei Liu: Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
Wenjun Zeng: Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
Zhengxing Long: Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
Zichuan Yi: College of Electron and Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zongshan 528402, China
Pengfei Bai: Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
Biao Tang: Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
Dong Yuan: Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
Guofu Zhou: Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China

DOI: https://doi.org/10.3390/ma15072555
Journal volume & issue: Vol. 15, no. 7
p. 2555

Abstract

Read online

A three-color electrophoretic display (EPD) can solve the defect of an insufficient color display of black/white EPDs, but it is difficult to achieve a high red saturation due to the same driving polarity between black and red electrophoretic particles. In this work, a separation stage was proposed in the driving process to increase the red saturation in three-color EPDs. Firstly, red particles’ motion was analyzed by the electrophoretic theory and Stokes’ theorem to optimize driving parameters. Secondly, the activity of black particles was analyzed by testing different driving process parameters, and an optimal activation parameter for red particles was obtained. Next, the separation stage parameters were analyzed to reduce the mixing degree of black and red electrophoretic particles. Experimental results showed that the red and black electrophoretic particles could be effectively separated. Compared with an existing driving method, the red saturation was increased by 23.4%.

Published in Materials

ISSN: 1996-1944 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering; Technology: Engineering (General). Civil engineering (General); Science: Natural history (General): Microscopy; Science: Physics: Descriptive and experimental mechanics
Website: http://www.mdpi.com/journal/materials/

About the journal

Abstract

Keywords