An electrophoretic display (EPD) cell with a triple-layered microcavity structure was fabricated using a convenient dry film resist. The inherent structural advantage arising from the function of the middle channel layer as a background colored state enabled the EPD to operate with two different-colored states by using a single type of electronic-ink particles, thereby eliminating the possible agglomeration of oppositely charged ink particles and supporting the potential application of the proposed structure to color the electronic paper. The preliminary operation of this new EPD structure was demonstrated as white and blue display states on a rigid glass exhibiting a contrast ratio of 1.5:1 with saturation voltages of +30 and -30 V, respectively. Successful demonstrations on both the indiumtinoxide-patterned glass and flexible polyethylene substrates are also provided.
Bibliographical noteFunding Information:
Manuscript received September 9, 2010; revised November 15, 2010; accepted January 5, 2011. Date of publication February 10, 2011; date of current version March 23, 2011. This work was supported by DaeDeok Innoplis for the research and development of electrophoretic particles, and also by the World Class University program through the National Research Foundation of Korea funded by the Ministry of Education, Science, and Technology under Grant R32-2009-000-10124-0. The review of this paper was arranged by Editor H.-S. Tae.
Ms. Nam is a recipient of the Seoul Science Fellowship from the Seoul Metropolitan Government
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering