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http://dx.doi.org/10.4313/JKEM.2020.33.5.386

Analysis on Current Characteristics According to Injection Method and Driving Waveform in Electrophoretic-Type E-Paper Display  

Lee, Joo-Won (Department of Electronic Engineering, Chungwoon University)
Kim, Young-Cho (Department of Electronic Engineering, Chungwoon University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.33, no.5, 2020 , pp. 386-392 More about this Journal
Abstract
In this study, the drift current characteristics of charged particles are analyzed for panels fabricated by varying the waveform biasing of the active particle loading method (APLM), which is a method driven by the electrophoretic principle of loading charged particles into a cell of a barrier rib-type electronic paper. We prepare 3 panels using APLM and 1 panel without APLM. The waveform of APLM uses square wave and ramp wave, and the step voltage wave is applied to the driving voltage. The drift currents measured from the square wave and ramp wave with the same period applied by APLM are 4.872 µC and 5.464 µC, respectively, and the ramp wave is shown to be relatively advantageous for loading charged particles that have a large q/m. The time-current curve results confirm that the abrupt movement of charged particles is occurring. When the step form wave signal with a short time of 1s is first applied, initial large movement of the charged particles is confirmed to occur in all samples, which is understood as the effect of applying the voltage necessary to remove the imaging force. The results of this study are expected to improve the loading of charged particles into the electronic paper cell, driven by the electrophoretic principle and optimization of the driving conditions.
Keywords
Charged particle; Active particle loading method; Driving voltage; Barrier rib-type electronic paper; Drift current;
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