Monday, December 12, 2005

Reading Matter

Last week there was again news about digital paper. At the 12th International Display Workshop the company Plastic Logic announced that it has developed the world's largest flexible organic active matrix display. The display consists of a flexible, high resolution, printed active-matrix backplane driving an electronic paper frontplane from US-based E Ink Corporation.

The displays are 10" diagonal SVGA (600 by 800) with 100ppi resolution and 4 levels of greyscale. The thickness of the display when laminated with E Ink Imaging Film™ is less than 0.4mm. The backplane substrate is made from low temperature PET supplied by DuPont Teijin Films which is more flexible and easier to handle than alternatives such as thin glass or steel foil.E Ink Imaging Film is an electrophoretic display material that looks like printed ink-on-paper and has been designed for use in paper-like electronic displays. Like paper, the material can be flexed and rolled. The film only consumes battery power while the image is updated.The displays were fabricated using Plastic Logic's new 350mm by 350mm Prototype Line and its proprietary printed electronics process that is scalable for large area, high volume and low cost. Plastic Logic will partner with manufacturers to bring the process to mass production.

Platic Logic's digital paper is also based on E-Ink technology. The announcement shows that the screens are getting larger, up to 10” diagonally. So far the screen size in production with Philips has been much smaller, but good enough for the Sony Librié screen of 15 cm diagonally.

Looking at the photograph of Plastic Logic the digital paper is still showing a page in black/white, as the press release says in four grey scales. In the meantime E-Ink has already produced a coloured screen in their laboratory.

Digital paper on the basis of other technologies have been produced by Fujitsu and Siemens.

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