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http://dx.doi.org/10.4313/JKEM.2012.25.6.451

Driving Characteristics of Flexible Reflective Display Using Carbon Nanotube Electrode  

Hwang, In-Sung (Seal Tech Co., Ltd.)
Kim, Young-Cho (Department of Electronic Engineering, Chungwoon University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.25, no.6, 2012 , pp. 451-455 More about this Journal
Abstract
To compare an electrical and optical characteristics of indium tin oxide (ITO) and carbon nanotube (CNT) electrode on flexible and reflective display, we fabricate two charged particle-type display panels under the same panel condition of which the width of ribs is 10 ${\mu}m$, the cell size is $300{\mu}m{\times}300{\mu}m$, the q/m value of the white particles is -4.3 ${\mu}C/g$ and that for the black is +1.3 ${\mu}C/g$, and the cell gap is 75 ${\mu}m$, 125 ${\mu}m$, and 175 ${\mu}m$. We use plastic substrates coated with ITO and CNT electrode. To evaluate optical property, we measure a response time of particles using a laser and a photodiode. Threshold and driving voltages of CNT electrode according to the sheet resistance of 300, 600, 1,000 (ohm/sq) are compared with ITO electrode of 10 (ohm/sq). A response time of the CNT panel is similar to that of ITO panel, but the threshold and driving voltages of CNT panel are higher than that of ITO panel, inducing a large bombardment of the particles and shortening the lifetime of the panel. High difference of a threshold and a driving voltage of CNT panel will induce an particle clumping, resulting degradation of the panel. A bending radius of the fabricated CNT panel is 18 ${\mu}m$.
Keywords
Reflective display; ITO; CNT; Charged particle; Response time; Driving voltage;
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