Li Wei, Wang Li, Zhang Taiyuan, Lai Shufa, Liu Linwei, He Wenyao, Zhou Guofu, Yi Zichuan
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China.
Shenzhen Guohua Optoelectronics Tech. Co., Ltd., Shenzhen 518110, China.
Micromachines (Basel). 2020 Jan 28;11(2):145. doi: 10.3390/mi11020145.
As a kind of paper-like display technology, power consumption is a very important index for electrowetting displays (EWDs). In this paper, the influence of driving waveforms on power consumption of the EWDs is analyzed, and a driving waveform with rising gradient and sawtooth wave is designed to reduce the power consumption. There are three stages in the proposed driving waveform. In the initial stage, the driving voltage is raised linearly from the threshold to the maximum value to reduce the invalid power consumption. At the same time, the oil breakup can be prohibited. And then, a section of sawtooth wave is added for suppressing oil backflow. Finally, there is a section of resetting wave to eliminate the influence of charge leakage. Experimental results show that the power consumption of the ultra-low power driving waveform is 1.85 mW, which is about 38.13% lower than that of the conventional used square wave (2.99 mW), when the aperture ratio is 65%.
作为一种类纸显示技术，功耗是电润湿显示器（EWD）的一个非常重要的指标。本文分析了驱动波形对EWD功耗的影响，并设计了一种具有上升梯度和锯齿波的驱动波形以降低功耗。所提出的驱动波形有三个阶段。在初始阶段，驱动电压从阈值线性上升到最大值以降低无效功耗。同时，可以防止油滴破裂。然后，添加一段锯齿波以抑制油回流。最后，有一段复位波以消除电荷泄漏的影响。实验结果表明，当开口率为65%时，超低功耗驱动波形的功耗为1.85 mW，比传统使用的方波（2.99 mW）低约38.13%。
