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White LEDs directly on paper

Imagine a white luminous curtain waving in the breeze. Or wallpaper that lights up your room with perfect white light. The applications are not very far away. White LEDs, made from zinc oxide and a conducting polymer, can ...

Jul 10, 2012 4 / 5 (6) 3

Mini-projector for smartphones

Their very small displays sometimes make smartphones diffi cult to operate. In the future, a projector will help: if the cell phone is standing on a table, for instance, it can project a large-format display ...

May 10, 2012 not rated yet 1

LED's efficiency exceeds 100%

(PhysOrg.com) -- For the first time, researchers have demonstrated that an LED can emit more optical power than the electrical power it consumes. Although scientifically intriguing, the results won’t ...

Mar 05, 2012 4.2 / 5 (73) 60 | with audio podcast report