An organic light-emitting diode (also called organic electroluminescence) is a thin-display technology that uses the electroluminescent properties of certain organic compounds. A thin film of such compounds is deposited on a glass substrate, and the resulting matrix of pixels emits light of different colors. Because OLEDs do not require any backlighting, ultrathin TV and computer screens can be built. In December 2007 Sony launched the world’s first TV using an OLED monitor with a thickness of only 3 millimeters.