Impedance analysis of oil conductivity and pixel non-uniformity in electrowetting displays

Bojian Xu; Yuanyuan Guo; Jitesh Barman; Ben H. Erné; Yong Deng; Guofu Zhou; Jan Groenewold

Results in Physics (Sep 2020)

Impedance analysis of oil conductivity and pixel non-uniformity in electrowetting displays

Bojian Xu,
Yuanyuan Guo,
Jitesh Barman,
Ben H. Erné,
Yong Deng,
Guofu Zhou,
Jan Groenewold

Affiliations

Bojian Xu: Shenzhen Guohua Optoelectronics Tech. Co. Ltd, Shenzhen 518110, People’s Republic of China; 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, People’s Republic of China
Yuanyuan Guo: Shenzhen Guohua Optoelectronics Tech. Co. Ltd, Shenzhen 518110, People’s Republic of China; 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, People’s Republic of China
Jitesh Barman: 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, People’s Republic of China; Department of Physics, Coochbehar College, Coochbehar Panchanan Barma University, Coochbehar, West Bengal 736101, India
Ben H. Erné: Van ‘t Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, Netherlands
Yong Deng: Shenzhen Guohua Optoelectronics Tech. Co. Ltd, Shenzhen 518110, People’s Republic of China; 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, People’s Republic of China
Guofu Zhou: Shenzhen Guohua Optoelectronics Tech. Co. Ltd, Shenzhen 518110, People’s Republic of China; 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, People’s Republic of China; National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, People’s Republic of China; Academy of Shenzhen Guohua Optoelectronics, Shenzhen 518110, People’s Republic of China
Jan Groenewold: 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, People’s Republic of China; Van ‘t Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, Netherlands

Journal volume & issue: Vol. 18
p. 103223

Abstract

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The electrical conductivity of the oil film is a key property of electrowetting displays (EWD) and its evolution probably correlates to the device lifetime. In this report, we fabricate an EWD device and measure its electrical impedance spectrum. The experimental results inform on the electrical resistivity of the oil film, as revealed by comparison with numerical simulations based on an equivalent electrical circuit model. Wide distribution in the oil-film resistance has to be incorporated into the model to reproduce the measured impedance spectrum precisely, which supports previous work indicative of pixel-to-pixel variation in the oil film electrical conductivity. Our work demonstrates that one can conveniently characterize the oil film resistance and its non-uniformity using electrical impedance spectroscopy.

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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