Yi Zichuan, Huang Zhenyu, Lai Shufa, He Wenyao, Wang Li, Chi Feng, Zhang Chongfu, Shui Lingling, Zhou Guofu
College of Electron and Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China.
Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China.
Micromachines (Basel). 2020 Mar 16;11(3):313. doi: 10.3390/mi11030313.
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.
电润湿显示器（EWD）的传统驱动波形存在诸多缺点，例如目标灰度开口率振荡大以及实现灰度所需时间长。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像素单元的滞后曲线获得了30V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，并通过测试开口率性能设计了指数函数的最佳时间常数。最后，使用EWD面板测试了指数函数驱动波形的驱动效果。实验结果表明，当为驱动EWD设计合适的时间常数时，可以实现稳定的灰度和较短的驱动时间。与传统驱动波形相比，灰度的开口率振荡范围可降低至0.95%以内，稳定灰度的驱动时间缩短了30%。
