e-ink

E Ink is a type of electronic paper manufactured by E Ink Corporation. It is a proprietary material that is processed into a film for integration into electronic displays, particularly for E-book devices such as the Sony Reader, the iLiad, the Cybook Gen3, the Amazon Kindle and the Readius device from Polymer Vision

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. 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.

Electronic Paper

ectronic paper, also called e-paper, is a display technology designed to mimic the appearance of ordinary ink on paper. Unlike a conventional flat panel display, which uses a backlight to illuminate its pixels, electronic paper reflects light like ordinary paper and is capable of holding text and images indefinitely without drawing electricity, while allowing the image to be changed later.There are several different technologies to build e-paper, some of which can use plastic substrate and electronics, so that the display is flexible. It is considered more comfortable to read than conventional displays. This is due to the stable image which does not need to be constantly refreshed, the large viewing angle, and the fact that it uses reflected ambient light. It has a similar contrast ratio to that of a newspaper and is lightweight and durable, however it still lacks good color reproduction.

Applications include e-book readers capable of displaying digital versions of books and e-paper magazines, electronic pricing labels in retail shops ^[1], time tables at bus stations ^[2], and electronic billboards ^[3].

Electronic paper should not be confused with digital paper, which is a pad to create handwritten digital documents with a digital pen.