Red Ghost Image Elimination Method Based on Driving Waveform Design in Three-Color Electrophoretic Displays

Micromachines

Zhuopei Liang¹  Wenjun Zeng²  Guofu Zhou²  Li Wang³ 

[1] College of Electron and Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China;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;School of Information Engineering, Zhongshan Polytechnic, Zhongshan 528400, China;

关键词: three-color electrophoretic displays;    driving waveform;    red ghost images;    microcapsule technology;    flickers;   

DOI  :  10.3390/mi13020275

来源: DOAJ

【 摘 要 】

Three-color electrophoretic displays (EPDs) are a new type of optoelectronic display device. However, they have the defect of red ghost images during gray scale transformation, which affects the accuracy of the gray scale display. In this paper, we proposed a new driving method for eliminating the red ghost images. A driving waveform was composed of an erasing stage, an activation stage, and a driving stage. First, the erasing stage was subdivided into a red erasing stage and an original erasing stage, the red erasing stage was used to eliminate residual red particles in the top of the microcapsules. Then, a high-frequency square wave was used as the activation stage for increasing the activity of the black and white particles. Meanwhile, the intensity of flickers could be decreased by the high-frequency square wave. Finally, the performance of the driving waveform was tested by a colorimeter. The experimental results showed that the driving waveform could effectively eliminate red ghost images by 80.43% and reduce the flicker intensity by 79.63%, compared with an existing driving waveform.

【 授权许可】

Unknown