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OLED, an organic light emitting diode, also light emitting polymer (LEP) and organic electro luminescence (OEL), is a light-emitting diode (LED) whose emissive electroluminescent layer is composed of a film of organic compounds. The layer usually contains a polymer substance that allows suitable organic compounds to be deposited. They are deposited in rows and columns onto a flat carrier by a simple "printing" process. The resulting matrix of pixels can emit light of different colors.

Such systems you can use in television screens, computer monitors, small, portable system screens such as cell phones and PDAs, watches, advertising, information and indication. OLEDs can also be used in light sources for general space illumination, and large-area light-emitting elements. OLED ‘s typically emit less light per area than inorganic solid-state based LEDs which are usually designed for use as point-light sources.

In the context of displays, OLEDs have a significant advantage over traditional liquid crystal displays (LCDs). OLED’s do not require a backlight to function. Thus, they can display deep black levels, draw far less power, and can be much thinner and lighter than an LCD panel. OLED displays also naturally achieve much higher contrast ratio than LCD screens using cold cathode fluorescent lamp (CCFL) backlights.

Acronyms for OLED:

• OLED = Organic Light Emitting Diode/Device/Display
• AMOLED = Active Matrix OLED device
• FOLED = Flexible Organic Light Emitting Diode (UDC)
• NOID = Neon Organic Iodine Diode (CDT)
• PhOLED = Phosphorescent Organic Light Emitting Diode (UDC)
• PLED = Polymer Light Emitting Diode (CDT)
• PMOLED = Passive Matrix OLED device
• POLED = Patternable organic light-emitting device
• RCOLED = Resonant Colour Organic Light Emitting Diode
• SmOLED = Small Molecule Organic Light Emitting Diode (Kodak)
• SOLED = Stacked Organic Light Emitting Diode (UDC)
• TOLED = Transparent Organic Light Emitting Diode (UDC)