A novel driving scheme for oil-splitting suppression in Electrowetting display

Luo, Zhijie; Fan, Junjun; Xu, Jiazhi; Zhou, Guofu; Liu, Shuangyin

doi:10.1007/s10043-020-00601-z

Cited by 17 publications

(14 citation statements)

References 17 publications

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“…In a previous study, the sinusoidal waveform could reduce oil splitting effectively [64]. Therefore, a novel driving scheme was proposed to reduce oil splitting [65]. The driving voltage increased gradually from a value which was below the threshold voltage to a final voltage with a sinusoidal curve.…”

Section: Driving Waveforms For Reducing Oil Splittingmentioning

confidence: 99%

Review of Driving Waveform for Electrowetting Displays

Zhang

Zeng

et al. 2021

Front. Phys.

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Electrowetting display (EWD) is the most potential technology among new electronic paper technologies. It not only has the advantages of electrophoretic display (EPD) technology but also can realize color video playback. Therefore, this technology has been widely studied in recent years. Driving waveform is a voltage sequence which can drive pixels to display gray scales in EWDs. As one of the key technologies, it directly affects the display effect of pixels. In this paper, we give a review of the display principle of EWDs and the research status of driving waveforms. At the same time, the contact angle hysteresis, charge trapping, and oil splitting are also reviewed, which can provide a reference value for designing driving waveforms.

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Section: Driving Waveforms For Reducing Oil Splittingmentioning

confidence: 99%

Review of Driving Waveform for Electrowetting Displays

Zhang

Zeng

et al. 2021

Front. Phys.

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“…A more functional driving waveform is based on the modified PWM square waves, as shown in Figure 11 [ 24 ]. The faster rising rate results in a shorter ink rearrangement time after oil film rupture [ 25 ].…”

Section: Electrical Driving: Optimization Of Opening Behavior and mentioning

confidence: 99%

“… Modified pulse width modulation (PWM) driving waveforms ( a ) sinusoidal driving waveform after optimization ( b ) sinusoidal driving waveform ( c ) ramp driving waveform ( d ) square wave driving waveform. (Images are reproduced from reference [ 24 ] with the permission of Springer Japan). …”

Section: Figurementioning

confidence: 99%

Progress in Advanced Properties of Electrowetting Displays

Yang

Guo

et al. 2021

Micromachines

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Electrowetting display (EWD) has promising prospects in the electronic paper industry due to it having superior characteristics, such as the ability to provide a comfortable reading experience and quick response. However, in real applications, there are also problems related to dielectric deterioration, excess power consumption, optical instability and narrow color gamut etc. This paper reviewed the existing challenges and recent progress made in terms of improving the optical performance and reliability of EWD. First, the principle of electrowetting applied in small and confined configurations is introduced and the cause of the failure of the dielectric layer is analyzed. Then, the function of the pixel structures is described to avoid display defects. Next, electric signal modulations are compared in terms of achieving good image quality and optical stability. Lastly, the methods are presented for color panel realization. It was concluded that multi-layer dielectrics, three-dimensional pixel structures, proper electric frequency-and-amplitude modulation and an RGB color panel are expected to resolve the current limitations and contribute to designing advanced reflective displays.

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“…A sinusoidal waveform with gradually increased voltage should avoid the oil film breaking into numbers of tiny oil droplets, reducing the display area. A functional driving waveform based on PWM was invented that can improve the opening rate and reduce the oil splitting effect and control the grayscale at the same time(Figure 5 ) [33,34] . As described before, charge trapping happened during the electrowetting process, thus the "oil flow back" occurs that would reduce the aperture ratio during the "on" state.…”

Section: Colored Oil Dynamic Manipulationmentioning

confidence: 99%

3.1: Invited Paper: Electrowetting display: Towards full‐color video reflective display

Guo

Yuan

Bai

et al. 2021

Symp Digest of Tech Papers

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Current mainstream display technologies include liquid crystal displays (LCD), Organic Light‐Emitting Diode (OLED), and electrophoretic paper displays (EPD). The electrowetting display (EWD) is expected to become a new member of the display family due to its fast response speed, paper‐like reflective display. In recent years, technology breakthroughs of electrowetting have been made in EWD. EWD has achieved playing dynamic videos with the comparable performance of LCD and displays print‐level color images. The current EWD has reached the color gamut NTS 50%, refresh time 12ms, and 260000 colors display. The potential applications of EWD including education, mobile terminals, e‐book readers, outdoor billboards, etc. The advantage of EWD will create new markets which are not accessible now.

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A novel driving scheme for oil-splitting suppression in Electrowetting display

Cited by 17 publications

References 17 publications

Review of Driving Waveform for Electrowetting Displays

Review of Driving Waveform for Electrowetting Displays

Progress in Advanced Properties of Electrowetting Displays

3.1: Invited Paper: Electrowetting display: Towards full‐color video reflective display

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