Short History of LEDs
The history of lighting shows that LEDs, or Light Emitting Diode bulbs, have been around for quite some time, but it is only now that the revolution is happening. LEDs have become very affordable and easy to integrate into existing and new designs. Today many big businesses, for example Philips, became major contributors to LEDs development.
The history of LEDs began with the invention of the first LED by Oleg Vladimirovich Losev in 1927. The first visible LED was created in 1962 by Nick Holonyak Jr. of the General Electric Company. The earliest uses of LEDs were in small, dim indicator lights in electronic appliances and equipment such as VCRs, clocks and calculators. Red LEDs were used in most of the electrical appliances.
In the ’70s and ’80s, the wider spectra of red, green and yellow have been developed using various material implementations within the diode itself.
In 1990s LED lighting started to spread very fast. The first bright LED was invented in 1993.
Before 1996, the only available LEDs were red, yellow and green. Green LEDs were made by using gallium phosphide and weren’t pure green. Shuji Nakamura introduced us to blue and pure green LEDs by using indium gallium nitride, in 1996.
Today LED illumination can be of any colour, including white.
In 2009 LED bulbs were still quite costly. It’s only in 2012 that there was a big drop in price.
Presently LEDs are used in accent and decorative lights, signs, displays, flashlights, traffic signals, architecture, residential lighting, retail lighting and entertainment.
Within the next ten years we will be seeing LEDs become smarter and coupled with more and more green development projects.
LEDs in future
LED illumination will become a part of our daily routines. Can you imagine your life completely free from having to ever turn our lights on or off? When the sun is going down and the lights increase the brightness. Once our cars pull up to the driveway, the lights in our driveway will light up. All of this will not be expensive or impossible to implement.
Estimates are that 20 percent of the world’s electricity is used for lighting and LEDs can cut down this by over 50 percent.
Within the next ten years we will be seeing history of LEDs evolve much faster than ever before. LED lighting will become smarter and coupled with more and more green development projects. In addition, the companies that will continue using old technology will face a bleak future.
If you think that LEDs are cheap today wait another two years. Most estimates put the price at around $2 a bulb by 2017. They will also be more efficient and last longer.
Architects are soon going to make sure that the LED lights are no longer visible. There will be no single source of light but rather an entire room will be lit up evenly. This will require that lights be built in a sequence through various portions across the home. So, depending on where you are the lights in that part of the home will light up and the parts nearest to you will be dimly lit. They will also be integrated with your smoke alarm and thermostat. In the event of a fire, the lights may turn red or they may turn green when there is a potential problem in a certain area.