A new patent application from Sony suggests the company might be the latest to jump on the dual-display ereader bandwagon. Unlike the nook and Spring Design Alex, however, the Sony design would incorporate its two screens into a foldable housing that could be used in either book orientation or, rotated 90-degrees, in a notebook orientation.
According to Sony's description, the device would have two touchscreens and could show an on-screen keyboard on the lower display when in notebook orientation. Flips between the two modes could be triggered by an accelerometer or a manual control, and Sony also envisage the possibility of solar panels to help with recharging the batteries.
Meanwhile integrated GPS could be used to pull in location-specific information into compatible ebooks. While billed as an ereader, Sony's application also suggests that the device could run other apps such as a word-processor; that pulls the ereader into more of a dual-display notebook, such as we've seen in the company's OLED concept (shown below).