Mechanism and Improvement of Charged-Particles Transition in Microcup Electrophoretic Displays

Electrophoretic display (EPD) is one of the most prominent technologies used in electronic paper. EPDs have good paper-like readability in ambient sunlight, and their bistability characteristics allow them to use very little power. To understand the physical mechanism at work in EPDs in terms of optical phenomena and current responses, we investigated EPD charging behavior using a transient current, an intermediate-state current, a discharge current, and a current bump. After establishing the microcup EPD model, we developed recommendations for a shortened transition time. As our experiments show, the method can reduce the transition time by 20%.

[1]  M. L. Hair,et al.  Some physicochemical properties of electrophoretic display materials , 1981 .

[2]  J. Berg,et al.  Mechanisms influencing the stability of a nonaqueous phosphor dispersion , 1993 .

[3]  J. Mort,et al.  Particle Charge, Mobility, and ζ Potential in Nonpolar Colloids , 1997 .

[4]  Richard M. Webber 10.4: Image Stability in Active-Matrix Microencapsulated Electrophoretic Displays , 2002 .

[5]  Herbert De Smet,et al.  The microscopic physics of electronic paper revealed , 2003 .

[6]  Herbert De Smet,et al.  Dielectrophoresis in electronic paper , 2003 .

[7]  Jack Hou,et al.  Microcup® displays: Electronic paper by roll‐to‐roll manufacturing processes , 2003 .

[8]  Herbert De Smet,et al.  Transient current properties in electronic paper , 2004 .

[9]  H. Smet,et al.  How to introduce a threshold in EPIDs , 2005 .

[10]  Herbert De Smet,et al.  Steady state current in EPIDs , 2006, Displays.

[11]  Laxmidhar Besra,et al.  A review on fundamentals and applications of electrophoretic deposition (EPD) , 2007 .

[12]  Paul Bartlett,et al.  Electrostatic charging of nonpolar colloids by reverse micelles. , 2007, Langmuir : the ACS journal of surfaces and colloids.

[13]  Lin-Yao Liao,et al.  Dynamic Backlight Gamma on High Dynamic Range LCD TVs , 2008, Journal of Display Technology.

[14]  Yi-Pai Huang,et al.  Color-breakup suppression and low-power consumption by using the Stencil-FSC method in field-sequential LCDs , 2009 .

[15]  Wen-Chung Kao,et al.  Image quality improvement for electrophoretic displays by combining contrast enhancement and halftoning techniques , 2009, IEEE Transactions on Consumer Electronics.

[16]  Yi-Pai Huang,et al.  Color-breakup suppression and low-power consumption by using the Stencil-FSC method in field-sequential LCDs , 2009 .

[17]  Peter G Bolhuis,et al.  The influence of micelle formation on the stability of colloid surfactant mixtures. , 2010, Physical chemistry chemical physics : PCCP.

[18]  Y. Sakka,et al.  Forming and Microstructure Control of Ceramics by Electrophoretic Deposition (EPD) , 2010 .

[19]  Yi-Pai Huang,et al.  Eco-Displays: The Color LCD's Without Color Filters and Polarizers , 2011, Journal of Display Technology.