Effect of liquid conductivity on optical and electric performances of the electrowetting display system with a thick dielectric layer

Mengyao Fan; Rui Zhou; Hongwei Jiang; Guofu Zhou

Results in Physics (Mar 2020)

Effect of liquid conductivity on optical and electric performances of the electrowetting display system with a thick dielectric layer

Mengyao Fan,
Rui Zhou,
Hongwei Jiang,
Guofu Zhou

Affiliations

Mengyao Fan: 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, PR China; National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, PR China
Rui 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, PR China; National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, PR China; Corresponding authors at: 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, PR China.
Hongwei Jiang: 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, PR China; National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, PR 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, PR China; National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, PR China; Shenzhen Guohua Optoelectronics Tech. Co. Ltd., Shenzhen 518110, PR China; Academy of Shenzhen Guohua Optoelectronics, Shenzhen 518110, PR China; Corresponding authors at: 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, PR China.

Journal volume & issue: Vol. 16
p. 102904

Abstract

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The effect of liquid conductivity on both the optical and electric performances of the electrowetting display system with a thick fluoropolymer insulating layer was investigated in this study. Low-conductivity deionized water and aqueous ionic solutions with different conductivities were used as the conducting liquids and tested in both the open electrowetting systems and the electrowetting display devices. The sessile droplet test was used to study the electrowetting performance of liquid droplets with different conductivities on fluoropolymer coated electrode and an experimental platform was designed to measure the leakage current of the liquid/fluoropolymer/electrode contact. 2.7-inch EWD specimens were also prepared for the experiments. The on-switching response time, the maximum aperture ratio of pixels and the current-voltage characteristic on device level were studied experimentally. We focused on the influence of liquid conductivity on the optical performance of the electrowetting displays. The test showed that, with deionized water, the leakage current value of the EWD cell was lower than 10 nA/cm2 at 30 V, while the average on-switching time and maximum aperture ratio water were 37.8 ms and 46.7%, respectively. The using of low-conductivity water as conducting liquid in electrowetting displays with a thick fluoropolymer insulating layer was discussed.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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