For cellphones, smartphones and dedicated reading devices, LCD screens have been replaced by screens using the technology developed by E Ink. As explained on the company's website: "Electronic ink is a proprietary material that is processed into a film for integration into electronic displays. Although revolutionary in concept, electronic ink is a straightforward fusion of chemistry, physics and electronics to create this new material. 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 where they become visible to the user. This makes the surface appear white at that spot. At the same time, an opposite electric field pulls the black particles to the bottom of the microcapsules where they are hidden. By reversing this process, the black particles appear at the top of the capsule, which now makes the surface appear dark at that spot. To form an E Ink electronic display, the ink is printed onto a sheet of plastic film that is laminated to a layer of circuitry. The circuitry forms a pattern of pixels that can then be controlled by a display driver. These microcapsules are suspended in a liquid 'carrier medium' allowing them to be printed using existing screen printing processes onto virtually any surface, including glass, plastic, fabric and even paper. Ultimately electronic ink will permit most any surface to become a display, bringing information out of the confines of traditional devices and into the world around us." Sony launched its first reading device, Librié 1000-EP, in Japan in April 2004, in partnership with Philips and E Ink. Librié was the first reading device to use the E Ink technology, with a 6-inch screen, a 10 M memory, and a 500- ebook capacity. eBooks were downloaded from a computer through a USB port. The Sony Reader was launched in October 2006 in the U.S. for US $350, followed by cheaper and revamped models. Amazon.com launched its own reading device, the Kindle, in November 2007. Before launching the Kindle, Amazon.com bought in April 2005 Mobipocket, a French company specializing in ebooks for PDAs, cellphones and smartphones, with a catalog of several thousands of books in several languages to be read on the Mobipocket Reader.