A Driving Method for Reducing Oil Film Splitting in Electrowetting Displays
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Published on: November 10, 2014
Wenjun Zeng1,2, Zichuan Yi1, Yiming Zhao1
1College of Electron and Information, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan 528402, China.
Abstract:
Electrowetting displays (EWDs) are one of the most potential electronic papers. However, they have the problem of oil film splitting, which could lead to a low aperture ratio of EWDs. In this paper, a driving waveform was proposed to reduce oil film splitting. The driving waveform was composed of a rising stage and a driving stage. First, the rupture voltage of oil film was analyzed by testing the voltage characteristic curve of EWDs. Then, a quadratic function waveform with an initial voltage was applied at the rising stage to suppress oil film splitting. Finally, a square wave was applied at the driving stage to maintain the aperture ratio of EWDs. The experimental results show that the luminance was increased by 8.78% and the aperture ratio was increased by 4.47% compared with an exponential function driving waveform.
