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Toward Suppressing Oil Backflow Based on a Combined Driving Waveform for Electrowetting Displays

Electrowetting display (EWD) is a new type of paper-like reflective display based on colored oil, which has gradually become one of the most potential electronic papers with low power consumption, fast response, and full color. However, oil backflow can occur in EWDs, which makes it difficult to mai...

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Detalles Bibliográficos
Autores principales: Long, Zhengxing, Yi, Zichuan, Zhang, Hu, Lv, Jinpu, Liu, Liming, Chi, Feng, Shui, Lingling, Zhang, Chongfu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9228827/
https://www.ncbi.nlm.nih.gov/pubmed/35744562
http://dx.doi.org/10.3390/mi13060948
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author Long, Zhengxing
Yi, Zichuan
Zhang, Hu
Lv, Jinpu
Liu, Liming
Chi, Feng
Shui, Lingling
Zhang, Chongfu
author_facet Long, Zhengxing
Yi, Zichuan
Zhang, Hu
Lv, Jinpu
Liu, Liming
Chi, Feng
Shui, Lingling
Zhang, Chongfu
author_sort Long, Zhengxing
collection PubMed
description Electrowetting display (EWD) is a new type of paper-like reflective display based on colored oil, which has gradually become one of the most potential electronic papers with low power consumption, fast response, and full color. However, oil backflow can occur in EWDs, which makes it difficult to maintain a stable aperture ratio. In order to improve the stability of the aperture ratio of EWDs, a new driving waveform was proposed based on analyzing the phenomenon of oil backflow. The driving waveform was composed of a shrinking stage and a driving stage. Firstly, a threshold voltage of oil splitting was calculated by analyzing the luminance curve of EWDs, which were driven by different direct current (DC) voltages. Then, an exponential function waveform, which increased from the threshold voltage, was applied to suppress oil splitting. Finally, a periodic signal combined with a reset signal with a DC signal was applied during the driving stage to maintain a stable aperture ratio display. Experimental results showed that the charge trapping effect could be effectively prevented by the proposed driving waveform. Compared with an exponential function waveform, the average luminance value was increased by 28.29%, and the grayscale stability was increased by 13.76%. Compared to a linear function waveform, the aperture ratio was increased by 10.44% and the response time was reduced by 20.27%.
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spelling pubmed-92288272022-06-25 Toward Suppressing Oil Backflow Based on a Combined Driving Waveform for Electrowetting Displays Long, Zhengxing Yi, Zichuan Zhang, Hu Lv, Jinpu Liu, Liming Chi, Feng Shui, Lingling Zhang, Chongfu Micromachines (Basel) Article Electrowetting display (EWD) is a new type of paper-like reflective display based on colored oil, which has gradually become one of the most potential electronic papers with low power consumption, fast response, and full color. However, oil backflow can occur in EWDs, which makes it difficult to maintain a stable aperture ratio. In order to improve the stability of the aperture ratio of EWDs, a new driving waveform was proposed based on analyzing the phenomenon of oil backflow. The driving waveform was composed of a shrinking stage and a driving stage. Firstly, a threshold voltage of oil splitting was calculated by analyzing the luminance curve of EWDs, which were driven by different direct current (DC) voltages. Then, an exponential function waveform, which increased from the threshold voltage, was applied to suppress oil splitting. Finally, a periodic signal combined with a reset signal with a DC signal was applied during the driving stage to maintain a stable aperture ratio display. Experimental results showed that the charge trapping effect could be effectively prevented by the proposed driving waveform. Compared with an exponential function waveform, the average luminance value was increased by 28.29%, and the grayscale stability was increased by 13.76%. Compared to a linear function waveform, the aperture ratio was increased by 10.44% and the response time was reduced by 20.27%. MDPI 2022-06-15 /pmc/articles/PMC9228827/ /pubmed/35744562 http://dx.doi.org/10.3390/mi13060948 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Long, Zhengxing
Yi, Zichuan
Zhang, Hu
Lv, Jinpu
Liu, Liming
Chi, Feng
Shui, Lingling
Zhang, Chongfu
Toward Suppressing Oil Backflow Based on a Combined Driving Waveform for Electrowetting Displays
title Toward Suppressing Oil Backflow Based on a Combined Driving Waveform for Electrowetting Displays
title_full Toward Suppressing Oil Backflow Based on a Combined Driving Waveform for Electrowetting Displays
title_fullStr Toward Suppressing Oil Backflow Based on a Combined Driving Waveform for Electrowetting Displays
title_full_unstemmed Toward Suppressing Oil Backflow Based on a Combined Driving Waveform for Electrowetting Displays
title_short Toward Suppressing Oil Backflow Based on a Combined Driving Waveform for Electrowetting Displays
title_sort toward suppressing oil backflow based on a combined driving waveform for electrowetting displays
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9228827/
https://www.ncbi.nlm.nih.gov/pubmed/35744562
http://dx.doi.org/10.3390/mi13060948
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