Most popular e-readers available today tend to be based around a 6-inch screen. Though you can read technical manuals, textbooks (with graphics and tables), comic strips or electronic magazines on these devices, the roughly paperback-sized display does tend to feel just a little cramped.
The Kno double-screened digital textbook offered hope of bigger display real estate a few years back, but dedicated hardware was abandoned in favor of a multi-device app. Together with E Ink Holdings, Sony has developed a new flexible electronic paper display technology called Mobius, that will make its debut in a new 13.3-inch Reader prototype at EDIX 2013 in Tokyo between May 15 and 17.
The "flexible" part of the recently-detailed Mobius e-paper display technology doesn't necessarily relate to its ability to bend, but rather to its lightweight, shatterproof or rugged characteristics. It's based around a thin film transistor technology that's formed on a plastic substrate rather than glass. This results in significant weight savings over equivalent glass-based products, meaning that Sony can increase the display size without making a reader that's just too heavy to handle.
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Via Chuck Sherwood, Senior Associate, TeleDimensions, Inc