28 May 2004 Threshold and grayscale stability of Microcup electronic paper
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Abstract
Plastic passive matrix (PM) and active matrix (AM) electronic paper displays (EPDs) have been prepared by SiPix’s Microcup roll-to-roll manufacturing processes using ITO/PET films. The Microcup displays have shown outstanding environmental stability and excellent physico-mechanical properties such as scratch, impact and flexure resistances even in high temperature and humidity conditions. A PMEPD recently prepared on inexpensive row-and-column patterned ITO/PET films has shown a contrast ratio of ≥10, ton ≤30 msec at ≤40 V, and a threshold voltage of ≥15 V. More than 8 levels of grayscale with outstanding bistability have been demonstrated by either pulse width or pulse count modulation. No noticeable degradation of the mid-tone images has been observed even after the power was turned off for more than 5 days. Moreover, the electro-optical responses, particularly the threshold voltage and gamma of the PMEPDs remain essentially the same within a wide range (20-60°C) of operation temperature.
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HongMei Zang, HongMei Zang, Jiunn-Jye Hwang, Jiunn-Jye Hwang, Haiyan Gu, Haiyan Gu, Jack Hou, Jack Hou, Xin Weng, Xin Weng, Yajuan Chen, Yajuan Chen, Rong Chang Liang, Rong Chang Liang, } "Threshold and grayscale stability of Microcup electronic paper", Proc. SPIE 5289, Liquid Crystal Materials, Devices, and Applications X and Projection Displays X, (28 May 2004); doi: 10.1117/12.524529; https://doi.org/10.1117/12.524529
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