Site Information

  Loading... Please wait...


Bright Idea: A Historical Timeline of The Invention of LED Lighting

Posted by Doug Root on 27th Mar 2019

While it's true that the history of LED lights isn't long in comparison to incandescent lights or Edison bulbs, the technology has been around longer than you might think. Most folks assume that LED lights are relatively new, mainly because they've only become easily accessible in the last decade or so. Learning about their history, such as who invented LED lighting and how it came to be, will make you appreciate the bulbs for their innovation as well as their energy efficiency and their ability to save money on your power bill. You'll find yourself thinking about the engineers and scientists behind the invention every time you screw in a light bulb.

A Brief Explanation of LED

To fully understand the history of LED lights, you first have to know what they are. LED stands for light-emitting diode. LED lights are electric components. They give off light only once they connect to a direct current. Following the electroluminescent principle, LED can emit visible light, along with infrared lights and ultraviolet. LEDs are characterized by a low energy burn, their lengthy lifespan, their ability to switch swiftly, and their size, which is smaller than traditional bulbs.

It took a while to work out the science and technology behind LED lights, however. Today, you can find LEDs at any store. Many of them come as part of a smart lighting kit that people can control from their cell phones or the hub they install at home. That variety comes after a hard-won battle and an interesting history.

The Silicon Carbide Connection

Technically speaking, Henry Joseph Round is the person who invented LED first, all the way back in 1907. Round was a British scientist who worked in the Marconi labs. He applied 10 volts to carborundum crystal. In other words, he created a current using silicon carbide—and it worked.

Unfortunately, the pale yellow light that resulted from his experiments didn't amount to much. It certainly wasn't enough to light up a room, or even a lab. Because the test seemed like a dud, no one bothered to touch the research for decades.

Twenty Years Later

By all accounts, no one bothered much with the concept of light-emitting diodes for the next two decades, until 1927. At that point, Russian scientist Oleg Vladimirovich Losev proposed a theory that relied on Henry Joseph Round's findings. Losev titled his paper, “Luminous carborundum detector and detection effect and oscillations with crystals,” making it appear that he was right on the precipice of cracking the LED code. Nothing much came from his paper, however, and yet again, the history of LED lights stalled for a few more decades.

Coming Up On Infrared

It took until 1955 for additional research to take place on the subject. That year, an employee at Radio Corporation of America, Rubin Braunstein, discovered a few of the secrets behind infrared light. Specifically, he revealed that some, but not all, simple diodes can put forth infrared when they have an active connection to a current. In spite of Braunstein's renown as a physicist, however, LED experiments once more stalled—but not quite as long this time.

Texas Instruments to the Rescue

Analysis resumed six years later, in 1961, courtesy of Bob Biard and Gary Pittman, engineers and inventors who worked at Texas Instruments. Through their work, they uncovered the fact that gallium-arsenide diodes also give off infrared as long as they have a stable current. They quickly made a smart move: they got the patent for infrared LED lights.

Visible Lights

Biard and Pittman helped to speed along the technology significantly. It's only fair to name them as two of the men who invented LED lights, too. To do that, however, the world also has to give props to Nick Holonyak, Jr., an engineer who worked at General Electric. In 1962, he made a monumental discovery. As a result, he's responsible for the development of an LED that gave off visible illumination, i.e., it emitted a light that you could see on the visible spectrum of the frequency. It, too, was a red LED.

An Avalanche of Innovation

Holonyak opened up the floodgates, finally speeding up the history of LED lights, at least in terms of their creation. Holonyak's graduate student, M. George Craford, picked up where his mentor left off and went running with it. However, it took ten years to improve on Holonyak's research. Craford's investigation didn't take place until 1972, but it quickly proved to be worth the wait.

Not only did Craford develop a much brighter red LED light, but he was also the first engineer to perfect the emission of another color. He's responsible for coming up with the very first LED to emit visible yellow light. The technology still wasn't complete, but Craford's discoveries ensured that other inventors and scientists could build on his efforts.

A Brighter Future

Come 1976, Thomas P. Pearsall stepped into the ring. His work resulted in the development of the brightest LED light yet. The high brightness LED he created came to be used alongside fiber optics technology, which led to extraordinary advances in telecommunications.

Going Blue

In 1979, the blue LED made its official debut. Shuji Nakamura, who worked for the Nichia Corporation, was the innovator behind its creation. From that point until 1994, however, LED lights proved to be too costly for commercial or residential use.

A History of Cost

In fact, the history of LED lights is mostly blank as it applies to residential use. It's funny that the most cost- and energy-efficient light available was too expensive to use for such a large part of its existence. LED lights were largely relegated to professional labs and, later, electronics.

In the beginning, you could expect to pay upwards of $200 per light, an exorbitant price no matter how much energy an LED light can save. At some point in the 1970s, Fairchild Semiconductors found a way to cut the cost of LED lights by changing their production processes. They began to use a planar method to make the semiconductor chips needed for light-emitting diodes. Their innovation is the only reason that LED lights don't still cost an arm and a leg today. Without it, we probably still wouldn't be able to afford them for commercial purposes.

As you can tell, it isn't as simple as listing a single person who invented LED lights. The truth is a bit more complicated than that and much more fascinating. You probably don't consider the history of LED lights as you swap out an old light bulb and screw in a new one, or as you pick out your first smart lighting kit at the store. Maybe now you can take a minute to appreciate the hard work and innovation behind the technology. You can also spare a second to browse the selection of LED lights at Atlanta Light Bulbs. Light up your corner of the world with a slice of history.

View Comments

Art and Light: How Lighting Influences Interior Design

Interior lighting design involves the clever use of light and shadows to put together a space that conveys tranquility, excitement, or passion. Atlanta Light Bulbs has a variety of tips for home interior accent lighting that can help you create a fresh space without changing the furniture or the flooring.The Illusion of SpaceYou know that [...]

Read More »

Do I need a special dimmer switch for LED light bulbs?

YES. If you are making the switch to LED downlights or LED light bulbs and want to dim them then we can help!Most LED bulbs and LED fixtures are now dimmable. If your wondering if your LED is dimmable you can usually find this information on the outer package our instruction manual. Being dimmable is one [...]

Read More »

Sensitive Eyesight: Choosing the Right Lighting Source for Visual Health

Light sensitivity can occur for a number of reasons. For some people, it's a warning sign for an oncoming migraine, or it sets in after the headache hits. It can happen when you get motion sick, when you're under the weather, or because your eyes have been affected by prolonged exposure to UV rays. The [...]

Read More »

LED Flood Light Fixtures Have Come Along Way

If you have been keeping up with the LED revolution you have probably noticed that there have been some vast improvements in the LED flood light. The LED flood light fixture was one of the first mass produced fixtures to enter the market in 2008-2010. The fixtures that came in from China were very expensive [...]

Read More »

5 Ways LEDs Can Set a Mood

Sometimes, all it takes is an LED mood light to change the entire vibe of a room. What emotion do you want to evoke? Mood room lighting is all about emotion, intent, and atmosphere. Don't get it twisted. You can set any kind of mood you like. Perhaps you're having guests over and you want [...]

Read More »

Why Are LEDs Less Likely to Cause a Fire?

LEDs have transformed the lighting industry. Efficient, long-lasting, and virtually maintenance-free, transitioning over to LED lighting at home or at work just makes sense these days. An often overlooked benefit of LEDs is that they’re far and away the safest light bulbs available. By switching to LEDs, you can drastically reduce the chance of causing [...]

Read More »

Are LED Light Bulbs as Energy Efficient as They Claim to Be?

LED light bulbs are one of today’s most energy-efficient and rapidly-developing lighting technologies. The rapid adoption of LED lighting technology marks one of the fastest technology shifts that we’ve seen in many years. The accelerated adoption of LED light bulbs is on track to save consumers and businesses across the U.S. up to $20 billion [...]

Read More »

What are the Best LED BR30 bulbs for installing in a 5 to 6 Inch recessed down light fixture?

Over the past 37 years Atlanta Light Bulbs has been supplying high quality LEDs, light bulbs, light fixtures and ballast to commercial buyers. We have seen alot of manufacturers come and go! We have also learned alot about what bulbs go best with recessed indoor can lights. Recessed can lights are in our homes, offices and [...]

Read More »

Meet the new Lithonia Lighting Wafer™ LED a Housing-Free Recessed Downlight with Switchable White for Indoor-Outdoor Use

At our goal is to keep our customers up to speed on the newest and coolest products in the lighting market. We want to make lighting cool again...the days of boring old downlights, light bulbs and fixtures are over! Welcome to the Smart Lighting Universe where you have control of your lighting. Now you [...]

Read More »

Scroll to top

All prices are in USD. Copyright 2019 Sitemap | Shopping Cart Software by BigCommerce