Faster, brighter ePaper
April 30th, 2009 by rbanks
A New E-Paper Competitor
“In their pixels, the researchers use aluminum layers that reflect light and carbon black ink for a deep black color. First, a polymer layer is patterned with wells that contain the black ink. An aluminum film is deposited on the polymer and topped with an indium tin oxide (ITO) transparent electrode layer. A voltage applied across the aluminum and the ITO electrode pulls the ink out of the well and spreads it over the entire pixel area. The pixels are as small as 100 micrometers wide, giving the display a resolution of 300 dots per inch. This is higher than many e-readers on the market, Heikenfeld says. Putting red, green, and blue color filters on top of each pixel would create color displays.” 
Technology Review
