So far, we have smartphones that use curved displays and OLED panels, but if the Sony Xperia Z Pureness ever makes it into production, the device would be the first to use a transparent display. In addition to its 5.2″ transparent screen, it features a Direct Methanol Fuel Cell battery and a photovoltaic charging panel to ensure you do not run out of power. Continue reading for more pictures and information.”It’s also slightly curved on the sides and seems to have metallic corners to protect the panel. The bezels are very narrow and the SIM slot is placed at the back of the metal portion at the bottom. The speaker is also very discrete, at the very bottom,” reports Concept-Phones.