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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