<A HREF="http://www.cnn.com/2004/TECH/01/07/hln.wired.oleds/index.html">Organic Light-Emitting Diodes</A> could be the future in high-tech gadgets. The secret is a luminous screen that has no backlight, uses less power, and is capable of more vibrant colors. The devices could be used in things like PDAs, cameras and notebook computers.