Organic light emitting diode. Researcher holding a panel of organic light emitting diodes (OLEDs). These ultra-thin polymer semi-conductors convert applied voltage into light. They have potential applications in displays on car dashboards, radios, mobile phones and medical equipment. They are thinner, lighter and brighter than traditional liquid crystal displays (LCDs). They also have a wider viewing angle and lower power consumption. Photographed at Osram Opto Semiconductors, San Jose, USA.