The traditional driving waveform of the electrowetting display (EWD) has many disadvantages, such as the large oscillation of the target grayscale aperture ratio and a long time for achieving grayscale. Therefore, a driving waveform based on the exponential function was proposed in this study. First, the maximum driving voltage value of 30 V was obtained by testing the hysteresis curve of the EWD pixel unit. Secondly, the influence of the time constant on the driving waveform was analyzed, and the optimal time constant of the exponential function was designed by testing the performance of the aperture ratio. Lastly, an EWD panel was used to test the driving effect of the exponential-function-driving waveform. The experimental results showed that a stable grayscale and a short driving time could be realized when the appropriate time constant value was designed for driving EWDs. The aperture ratio oscillation range of the gray scale could be reduced within 0.95%, and the driving time of a stable grayscale was reduced by 30% compared with the traditional driving waveform.

中文翻译：

---

基于指数函数的灰度稳定且驱动时间短的电润湿显示器驱动波形设计

电润湿显示器（EWD）的传统驱动波形具有许多缺点，例如目标灰度孔径比的大振荡和获得灰度的时间长。因此，本研究提出了一种基于指数函数的驱动波形。首先，通过测试EWD像素单元的磁滞曲线获得30 V的最大驱动电压值。其次，分析了时间常数对驱动波形的影响，并通过测试孔径比的性能设计了指数函数的最佳时间常数。最后，使用EWD面板测试指数函数驱动波形的驱动效果。实验结果表明，通过设计合适的时间常数驱动电驱车，可以实现稳定的灰度和较短的驱动时间。与传统的驱动波形相比，灰度的孔径比振荡范围可以减小到0.95％以内，稳定的灰度的驱动时间可以减少30％。