Hellow Fellow Readers !! WOW it’s really been a while since we wrote a new post for you guyz. It's always good to be back, especially when there is a celebration of 50 years of something. This time it's about the invention of the LED. Do you know what it is? If not, don´t worry and enjoy the ride!
First it’s really great to be back around here. I hope to keep updating this blog with a lot of cool things that I have in mind but anyway, you will find that stuff in another post! This post is to celebrate something so tiny and so important in modern life that it just nearly escapes our attention. It is the LED, something very revolutionary and energy-friendly that was invented 50 years from now (or maybe 50 years ago!).
According to Wikipedia this is the definition of the LED:
A light-emitting diode (LED) is a semiconductor light source.[4] LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. Appearing as practical electronic components in 1962,[5] early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness.
When a light-emitting diode is forward-biased (switched on), electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence and the color of the light (corresponding to the energy of the photon) is determined by the energy gap of the semiconductor. An LED is often small in area (less than 1 mm2), and integrated optical components may be used to shape its radiation pattern.[6] LEDs present many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved physical robustness, smaller size, and faster switching. LEDs powerful enough for room lighting are relatively expensive and require more precise current and heat management than compact fluorescent lamp sources of comparable output.
Light-emitting diodes are used in applications as diverse as aviation lighting, automotive lighting, advertising, general 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.
Well, I am an Engineer, and the importance that i give to the LED is very big. I love that something so simple can be so useful at the same time. Below you can find a video of its maker:
Thanks for reading us and thanks to a friend of mine to share this video.
It’s good to be back !
