E Ink

The Motorola F3 was the first mobile phone to employ E Ink technology into its display, taking advantage of the material's ultra-low power consumption. In addition, the Samsung Alias 2 utilizes this technology as the display on the buttons change.The October 2008 limited edition North American issue of Esquire was the first magazine cover to integrate E Ink, and featured flashing text. The cover was manufactured in Shanghai, China, shipped refrigerated to the United States for binding and was powered by a nominal 90 day integrated battery supply.
According to the manufacturer, "The principal components of electronic ink are millions of tiny microcapsules, about the diameter of a human hair.In one incarnation, each microcapsule contains positively charged white particles and negatively charged black particles suspended in a clear fluid. When a negative electric field is applied, the white particles move to the top of the microcapsule to become visible to the reader.