Portable multi‐gray scale video playing scheme for high‐performance electrowetting displays

Luo, Zhi Jie; Zhang, Wei Nan; Liu, Lin Wei; Xie, Shuting; Zhou, Guofu

doi:10.1002/jsid.444

Cited by 23 publications

(21 citation statements)

References 24 publications

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“…Therefore, the driving waveform should effectively suppress the oil backflow, eliminate the trapping charge, and keep the DC balance. Figure shows the conventional driving waveform . The driving waveform is separated into two stages: display stage and reset stage.…”

Section: Ewd Display Optimization Designmentioning

confidence: 99%

“…Figure 4 shows the conventional driving waveform. 12 The driving waveform is separated into two stages: display stage and reset stage. There are seven frames in display stage, which realizes 16 gray levels.…”

Section: Driving Waveform Designmentioning

confidence: 99%

“…Yi‐Cheng Chen et al analyze the problem existing in EWD, such as charge trapping and coupling, and put forward the corresponding driving scheme . In recent years, South China Normal University has been dedicated to the development of EWD . However, display products based on electrowetting technology still have some problems to be overcome.…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10] In recent years, South China Normal University has been dedicated to the development of EWD. [11][12][13][14][15][16] However, display products based on electrowetting technology still have some problems to be overcome. There is no driver IC for EWD on the market, and it is expensive for designing driver IC for EWD.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of display performance of electrowetting displays by optimized waveforms and error diffusion

et al. 2019

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The electrowetting display (EWD) has a low gray level, and there are some phenomena that affect the display quality, such as oil backflow and charge trapping. In this paper, an error diffusion algorithm based on pixel neighborhood gray information and direct current (DC)‐balanced driving waveform are proposed for display quality of EWD. The proposed algorithm and driving waveform are implemented in the proposed driving system based on Digital Visual Interface (DVI) video codec system and field‐programmable gate array (FPGA) control system. The experiment results show that the driving waveform suppresses the oil backflow, charge trapping and keeps DC balance, and the proposed error diffusion preserves the edges and richness of image. The whole driving system successfully plays video in real time with computer and improves the display quality of EWD.

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Section: Ewd Display Optimization Designmentioning

confidence: 99%

Section: Driving Waveform Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improvement of display performance of electrowetting displays by optimized waveforms and error diffusion

et al. 2019

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“…It can display grayscale by controlling the movement of the colored ink. In the past few decades, various driving systems and image processing methods based on multi-level grayscale dynamic EWDs have greatly improved display quality [5,6]. We have also proposed a driving system for multi-grayscale display in an EWD based on a field programmable gate array (FPGA) chip, which provides an important reference for optimizing the dynamic display of EWDs [7].…”

Section: Introductionmentioning

confidence: 99%

Aperture Ratio Improvement by Optimizing the Voltage Slope and Reverse Pulse in the Driving Waveform for Electrowetting Displays

Feng

Wang

et al. 2019

Micromachines

Self Cite

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Electrowetting display (EWD) performance is severely affected by ink distribution and charge trapping in pixel cells. Therefore, a multi structural driving waveform is proposed for improving the aperture ratio of EWDs. In this paper, the hysteresis characteristic (capacitance–voltage, C-V) curve of the EWD pixel is tested and analyzed for obtaining the driving voltage value at the inflection point of the driving waveform. In the composition of driving waveform, a voltage slope is designed for preventing ink dispersion and a reverse pulse is designed for releasing the trapped charge which is caused by hysteresis characteristic. Finally, the frequency and the duty cycle of the driving waveform are optimized for the max aperture ratio by a series of testing. The experimental results show that the proposed driving waveform can improve the ink dispersion behavior, and the aperture ratio of the EWD is about 8% higher than the conventional driving waveform. At the same time, the response speed of the driving waveform can satisfy the dynamic display in EWDs, which provides a new idea for the design of the EWD driving scheme.

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Position and feedback for digital microfluidic system based on light intensity information

Luo

Fan

Huang

et al. 2020

Asia-Pacific J Chem Eng

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The digital microfluidic system based on electrowetting on dielectric is a new technology that can control microliter droplets within the plane. Because of layout, fabrication, and driving uncertainties, feedback control schemes must be designed and implemented to ensure safety and reliability of digital microfluidic system for practical application. The basis for feedback is to realize the accurate droplet location. So, there is a strong need for the development of a digital microfluidic system integrated with position and feedback scheme for innovative biological research. In this paper, we propose a position and feedback scheme based on light intensity for digital microfluidic system. The verified experiment results show that the proposed position and feedback scheme can position multiple droplets accurately and improve the success rate of droplets transport application by feedback.

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Portable multi‐gray scale video playing scheme for high‐performance electrowetting displays

Cited by 23 publications

References 24 publications

Improvement of display performance of electrowetting displays by optimized waveforms and error diffusion

Improvement of display performance of electrowetting displays by optimized waveforms and error diffusion

Aperture Ratio Improvement by Optimizing the Voltage Slope and Reverse Pulse in the Driving Waveform for Electrowetting Displays

Position and feedback for digital microfluidic system based on light intensity information

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