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THE LED THE LED Group members: Group members: Andres Ladino Andres Ladino Diego Avila Diego Avila
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Page 1: The led

THE LEDTHE LED

Group members:Group members:

Andres LadinoAndres Ladino Diego AvilaDiego Avila

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The inventor:The inventor:

Nick Holonyak, Jr. (born November 3, 1928, in Zeigler, Illinois) Useful Practically invented the first visible LED in 1962 while working as a consulting scientist at General Electric Company laboratory in Syracuse, New York and`ve Been Called "the father of the light-emitting diode "He is the John Bardeen Endowed Chair in Electrical and Computer Engineering and Physics and Professor of electrical and computer engineering at the University of Illinois at Urbana-Champaign WHERE I've Been Since 1963.

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The led:The led:

light-emitting diode is a semiconductor light-emitting diode is a semiconductor light source. LEDs are used as indicator light source. LEDs are used as indicator lamps in many devices and are lamps in many devices and are increasingly used for other lighting. increasingly used for other lighting. Introduced as a practical electronic Introduced as a practical electronic component in 1962, early LEDs emitted component in 1962, early LEDs emitted low-intensity red light, but modern versions low-intensity red light, but modern versions are available across the visible, ultraviolet are available across the visible, ultraviolet and infrared wavelengths, with very high and infrared wavelengths, with very high brightness. brightness.

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Light-emitting diodes Are Used in Applications Light-emitting diodes Are Used in Applications as diverse as replacements for aviation lighting, as diverse as replacements for aviation lighting, automotive lighting (Particularly brake lamps, automotive lighting (Particularly brake lamps, turn Signals and indicators) as well as in traffic turn Signals and indicators) as well as in traffic Signals. The compact size, The Possibility of Signals. The compact size, The Possibility of narrow bandwidth, switching speed, and narrow bandwidth, switching speed, and extreme reliability of LEDs has allowed new text extreme reliability of LEDs has allowed new text and video displays and sensors to Be and video displays and sensors to Be Developed, while Their high switching rates are Developed, while Their high switching rates are found Also Useful in advanced communications found Also Useful in advanced communications technology. Infrared LEDs Are Also Used in the technology. Infrared LEDs Are Also Used in the remote control units of Many commercial remote control units of Many commercial products Including televisions, DVD players, and products Including televisions, DVD players, and Other domestic appliances.Other domestic appliances.

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Using LED's as light fixtures.Using LED's as light fixtures.

Until recently, the use of LED lighting was very Until recently, the use of LED lighting was very low, its use was reduced almost to see if a low, its use was reduced almost to see if a device is working properly or just was on.device is working properly or just was on.This conception of the diodes in recent years This conception of the diodes in recent years has changed, are now beginning to be used for has changed, are now beginning to be used for mass enlightenment such as public lighting and mass enlightenment such as public lighting and household.household.The reasons to possibly make this change and The reasons to possibly make this change and stop using the bulbs for so many years have stop using the bulbs for so many years have been in force are:been in force are:

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- Size: For a luminosity similar to that of a light - Size: For a luminosity similar to that of a light bulb, the size that occupy the corresponding bulb, the size that occupy the corresponding LED would be much lower. What gives a LED would be much lower. What gives a greater capacity for integration.greater capacity for integration.

- Another benefit of this, is that having smaller - Another benefit of this, is that having smaller can join many diodes with ease and thereby can join many diodes with ease and thereby get even more light as a light bulb without ever get even more light as a light bulb without ever reaching a tenth of its size.reaching a tenth of its size.

- Brightness: The brightness of an LED is - Brightness: The brightness of an LED is usually lower than that of a bulb, but one usually lower than that of a bulb, but one advantage it has over this is that LED lighting advantage it has over this is that LED lighting is completely uniform throughout its surface, is completely uniform throughout its surface, the opposite thing happens with a light bulb.the opposite thing happens with a light bulb.

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Image of LED applicationsImage of LED applications

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bibliographybibliography

Wikipedia, Wikipedia, www.wikipedia.com

Infoleds, infoleds.wordpress.comInfoleds, infoleds.wordpress.com

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