| Light Emitting Diode or LED Technology in lighting | | | | lighting. Introduced as a practical electronic |
| can be traced back to 1927 although it didn't | | | | component in 1962, early LEDs emitted |
| make an entrance into commercial applications till | | | | low-intensity red light, but modern versions are |
| much later. Having taken a back seat for many | | | | available across the visible, ultraviolet and infrared |
| years largely owing to its high production cost | | | | wavelengths, with very high brightness. |
| LED lighting is rapidly gaining ground in the lighting | | | | The LED is based on the semiconductor diode. |
| space in more recent times. With the increasing | | | | When a diode is forward biased (switched on), |
| demand for greener, more energy efficient | | | | electrons are able to recombine with holes within |
| products as well as the environmental strain on | | | | the device, releasing energy in the form of |
| energy resources in our times is LED technology | | | | photons. This effect is called electroluminescence |
| the answer to the future of our lighting needs? | | | | and the color of the light (corresponding to the |
| Where is LED technology headed and does it | | | | energy of the photon) is determined by the |
| have the research momentum and industrial | | | | energy gap of the semiconductor. An LED is |
| backing to take on the light bulb which was | | | | usually small in area (less than 1 mm2), and |
| perhaps the most life-changing invention of our | | | | integrated optical components are used to shape |
| time? | | | | its radiation pattern and assist in reflection. LEDs |
| Introduction to Light-Emitting-Diode or LED | | | | present many advantages over incandescent light |
| Technology | | | | sources including lower energy consumption, |
| A light-emitting diode (LED) is a semiconductor | | | | longer lifetime, improved robustness, smaller size, |
| light source. LEDs are used as indicator lamps in | | | | faster switching, and greater durability and |
| many devices, and are increasingly used for | | | | reliability. Click Here to read more... |