AMSTERDAM (Reuters) - Dutch firm Philips Electronics said on Monday it was preparing to mass-produce a slim, book-sized display panel onto which consumers could download newspapers and magazines -- then roll up and put away. The 5-inch display, which can show detailed images, can be rolled up into a pen-sized holder. If connected to a mobile phone, it can also be used to download web pages, a book or email. Philips said it had created the displays using electronics circuits made of plastics, which power a monochrome display created with technology from E Ink, a privately-held U.S. company from Cambridge,...