15 October 2015 An improved driving waveform reference grayscale of electrophoretic displays
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Driving waveform is an important component for gray scale display on the electrophoretic display (EPD). In the traditional driving waveform, a white reference gray scale is formed before writing a new image. However, the reflectance value can not reach agreement in each gray scale transformation. In this paper, a new driving waveform, which has a short waiting time after the formation of reference gray scale, is proposed to improve the consistency of reference gray scale. Firstly, the property of the particles in the microcapsule is analyzed and the change of the EPD reflectance after the white reference gray scale formation is studied. Secondly, the reflectance change curve is fitted by using polynomial and the duration of the waiting time is determined. Thirdly, a set of the new driving waveform is designed by using the rule of DC balance and some real E-ink commercial EPDs are used to test the performance. Experimental results show that the effect of the new driving waveform has a better performance than traditional waveforms.
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Li Wang, Li Wang, Zichuan Yi, Zichuan Yi, Bao Peng, Bao Peng, Guofu Zhou, Guofu Zhou, } "An improved driving waveform reference grayscale of electrophoretic displays", Proc. SPIE 9672, AOPC 2015: Advanced Display Technology; and Micro/Nano Optical Imaging Technologies and Applications, 967204 (15 October 2015); doi: 10.1117/12.2199212; https://doi.org/10.1117/12.2199212

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