We take light for granted even though it is an essential factor in the composition of life. Even now as we are programming our outdoor LED spotlights or pay attention to emergency lighting as we drive, they go unnoticed. Light helps us to produce, play and even rest more effectively. We have used fire to prolong our ability to see effectively and later turned to the incandescent bulb. The LED method of emitting light is both old school and revolutionary. Here’s why commercial LED lighting tech can help to save the world.
The Mechanics of Commercial LED Lighting
Today, you may pick up a small flashlight that is smaller than a pen which can pierce the darkness with a brilliant glow. This is the power of semiconductor, LED technology. The semiconductor technology generates light through a process called effect is called electroluminescence. The diodes emit light at very low voltages. This allows for extremely energy efficient lighting for commercial and residential purposes.
The process is based on the theory that certain materials will glow when electricity passes through them. Unlike incandescent bulbs, LED light sources have no filament to heat up, but light up through the stimulation of electrons in the semiconductor.
If you take a close look at an individual diode, it is very small. The diode is made of an epoxy lens, wire bond, a reflective cavity along with a semiconductor die. For example, standard LED kitchen lighting will have a number of these diodes embedded in the fixture.
The lead frame is composed of an anvil section and post section. The unit is sealed with a flat bottom to prevent the conductors from being forced out. The diode has two prongs projecting from the bottom; the anode (positive) and the cathode (negative) leads.
The LED – Its Inventors and Champions
The Light-Emitting Diode was the invention of Oleg Losev in 1927. During the early days of radio, large diodes were installed to operate radios and Losev took notice of the electroluminescence in the diodes. He conducted copious research on the process. His research led to the development of modern LEDs.
Other researchers later refined the production of passive optoelectronic process; most notably Gary Pittman and James R. Biard of Texas Instruments in 1961. They were seeking to produce laser light from the process and ended up creating infrared LEDs instead.
Researcher Nick Holonyak succeeded in creating visible light emitters along the red spectrum in 1962 for General Electric Corporation. He was also the first to develop a light dimmer and even the laser diode. Nolo Holonyak earned the title of “Father of the LED”. You can thank him for your LED landscaping lights around your yard.
In 1972 M. George Craford working for the Monsanto Company, perfected the LED (Light Emitting Diode) system even further with the first units to glow in the full red and yellow spectrum. He even increased the brightness by a factor of 10.
In 1968 the first full production of LED units made it off the Monsanto factory floor. The popularity of LEDs came about through Fairchild Optoelectronics. The company produced low-cost LED devices for other manufacturers.
Thomas P Piersall took the process even further with a high-efficiency LED unit that was extremely bright. This was perfect for fiber optics and fiber telecommunications in the latter half of the 1970s. New semiconductor materials were used to optimize the transmission wavelengths for fiber-optic cables.
Blue LEDs were invented in 1994 by Shuji Nakamura. Now these diodes are used in a variety of applications from automobile lights, traffic lights and airplanes to electronic displays and pen sized flashlights. Commercial LED light fixtures are replacing commercial fluorescent lighting in many factories and office buildings. There are even replacing commercial flood lights for significant energy savings.
The Future of LED Lights
Researchers are taking the LED technology into the realm of digital communications. VLC or visible light communications uses state-of-the-art LED solutions sending data to and from various points at the speed of light. The goal is to piggyback data communication on existing lighting systems which offer very low energy output while using existing technology. Hotels and health clubs are utilizing LED ceiling lights as well as LED pool lights to maximize safety and energy efficiency.
Research and development continues to drive the cost of producing electronics downward. Solid-state lighting is reaching a point of practical application in everyday use. LED systems can now produce full-spectrum white light to mimic natural daylight. High-power LEDs will soon make their way to automobile headlights shortly.
Scientists assure us that we have only begun to explore the many variables of related technologies; applying digital concepts to our analog world. LED technology continues to improve through nonstop research. The incandescent light bulb was just an idea in 1802. The world is still running on 19th century technology. Ongoing improvements in the economy of scale will soon allow us to realize even greater benefits from LED technology. Commercial LED lighting is boosting profits and contributing to green technology efforts on a global scale.
Here I show you how to wire a LED Please comment, rate, and subscribe Thanks!! Note: This tutorial is for a single LED not in series or parallel ———–N…
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