Three-color electrowetting display device for electronic paper

Three-color electrowetting (EW) reflective display devices have been achieved using a vertical stack structure with colored oils. Fundamental properties (interface tension and geometry) of the EW process were investigated. Arrays of similar to 1000-2000 pixels were constructed with pixel sizes of 200 x 600 and 300 x 900 mu m(2). Each color layer can be switched independently. Open (oil-free) area fraction of similar to 80% in each cell is achieved at similar to 10-12 V. Switch-on times range from 5 to 15 ms, suitable for video content display. These characteristics demonstrate that the EW vertical structure has the potential to produce attractive video-speed color reflective electronic paper devices. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3464963]