Optimization of Overdriving Pulse for Luminance Stability of Electrowetting Displays.

Yanjun Yang, Zichuan Yi, Wanzhen Xu, Jiashuai Wang, Qingsong Lu, Qifu Liu, Liming Liu, Feng Chi

Abstract read

In one paragraph

Article in Micromachines, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

8 authors.

Yanjun YangSchool of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China.

Zichuan YiSchool of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China.ORCID 0000-0001-7670-7916

Wanzhen XuGuangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China.

Jiashuai WangSchool of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu 611731, China.ORCID 0009-0006-3729-4411

Qingsong LuSchool of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China.

Qifu LiuSchool of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China.

Liming LiuSchool of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China.ORCID 0000-0001-7649-026X

Feng ChiSchool of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China.

Funding

Department of Education of Guangdong Province 2022GXJK111Innovation Team (China) 2024KCXTD056Key Laboratory of Guangdong Province 2023KSYS011National Natural Science Foundation of China NO. 62575059

6 · The paper itself

Abstract

As a reflective display technology, electrowetting displays (EWDs) have the advantages of a paper-like appearance, fast response speed, and full-color capability. However, the use of an overdriving voltage to improve the response speed of EWDs can cause fluctuations in display luminance, which manifest as glitches in the luminance change curve. In order to eliminate this luminance instability phenomenon, a new driving pulse is proposed, which consists of an overdriving phase, a switching phase, and a driving phase. Firstly, a simplified equivalent circuit model is proposed to apply a target voltage in the driving phase without break down of the hydrophobic insulating layer. Secondly, a COMSOL (Version 6.3) two-dimensional model is established to simulate the oil contraction process and conduct comparisons, so as to ensure the effectiveness of the overdriving pulse. Then, the overdriving phase is applied to improve oil response speed, and a linear function is used in the switching phase to alleviate glitch phenomena. Moreover, the influences of overdriving voltage, overdriving time, and linear switching time on the luminance curve are analyzed by charge trapping theory in order to obtain optimal performance. The experimental results show that the glitch phenomenon is eliminated effectively, and the luminance of the EWD is increased by 1.02% and 1.96% compared with the step switching pulse and PWM pulse, respectively, while the response time is shortened by 1.82% and 8.05% compared with the step switching pulse and PWM pulse, respectively.

Indexed as

electrowetting display (EWD)electrowetting principlelinear conversionLuminance stabilityoverdriving pulse

Identifiers

PMID41156332

DOI10.3390/mi16101085

PMCPMC12565892

What Socratic holds

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LicenceCC BY

Read underepoch 390

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.