LED lighting systems provide tremendous opportunity for environmental, technological and design advances in illumination. The LED committee is an initiative to co-ordinate and promote LED technology at a global level in order to accelerate the uptake of LED lighting. The LED committee is currently chaired by Wolfgang Andorfer.
What is LED lighting?
Light Emitting Diode (LED) technology is a type of Solid State Lighting (SSL) that utilizes light emitting diodes as the source of light. A light emitting diode is a semiconductor light source first developed in the 1960s. LEDs present many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved robustness, smaller size, and faster switching capabilities. LEDs represent one of the most energy-efficient and versatile forms of lighting, saving up to 70% energy and money when compared to other lighting technologies. LEDs offers both high quality light and visual performance and increasingly good design options. LED lamps offer longer lifetimes, but initial costs are higher than those of fluorescent and incandescent lamps.
LED lamps are used for general and special-purpose lighting. Where colored light is needed, LEDs naturally emit many colors and require no filters, thereby improving energy. LED sources are compact, which gives flexibility in designing lighting fixtures and good control over the distribution of light with small reflectors or lenses. Because of the small size of LEDs, control of the spatial distribution of illumination is extremely flexible, and the light output and spatial distribution of a LED array can be controlled with no efficiency loss. LEDs have the capability to instantly turn on and off without affecting the lifetime of the bulb. With proper driver electronics design, an LED lamp can be made dimmable over a wide range as there is no minimum current needed to sustain lamp operation.
LED lamps have no glass tubes to break, and their internal parts are rigidly supported, making them resistant to vibration and impact. Additionally, compared to fluorescent bulbs, LEDs contain no mercury.
LEDs are used in applications as diverse as aviation lighting, automotive lighting, and traffic signals. LEDs have allowed new text, video displays, and sensors to be developed, while their high switching rates are also useful in advanced communications technology. Infrared LEDs are also used in the remote control units of many commercial products including televisions, DVD players, and other domestic appliances.
With the phasing out of the sale of traditional light bulbs in the EU by September 2012, in the next few years about 8 billion incandescent lamps in European homes, offices and streets will need to be replaced by more energy efficient lighting solutions. These include LED and organic LED (or OLED) lighting technologies.
What is OLED lighting?
An organic light emitting diode (OLED) is a light-emitting diode (LED) that possesses a layer of organic compounds which emit light in response to an electric current. Both OLEDs and LEDs are solid state devices.
OLEDs represent an advancement of LED technology. They are thinner, lighter weight, and more flexible than LEDs and can be fabricated on flexible plastics. OLEDs also possess wider viewing angels and improved brightness. OLEDs also possess an even better power efficiency than LEDs (which are a great improvement over fluorescents and incandescent bulbs). Additionally, OLEDs have the fastest response time of all commercially available lighting options at this time.
OLEDs are used in television set screens, computer monitors, small, portable system screens such as mobile phones and PDAs, watches, advertising, information, and indication. OLEDs are also used in large-area light-emitting elements for general illumination.
OLEDs represent the future of lighting.