Create a personalised content profile. Measure ad performance. Select basic ads. Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights.
Measure content performance. Develop and improve products. List of Partners vendors. Share Flipboard Email. Mary Bellis. Inventions Expert.
Mary Bellis covered inventions and inventors for ThoughtCo for 18 years. She is known for her independent films and documentaries, including one about Alexander Graham Bell. Updated February 14, Need help getting started on your lighting project? Tell us about what you are trying to accomplish and one of our certified lighting specialists will follow up with you by the end of the next business day with product recommendations to suit your needs.
Light-emitting diode LED is right now the most energy-efficient lighting technology available for use in commercial and business purposes, and it is only natural that it is also one of the most rapidly-developing technologies. LED is a kind of solid-state lighting where a semiconductor converts electricity to light without producing heat usually in a small area of about 1 square millimeter or less the diode.
So in an LED lamp, there are actually multiple light-emitting diodes. The light generated is projected in one direction, which does away with the need to use diffusers and reflectors.
The concept of electroluminescence lies at the heart of the development of LED lights. However, the yellow light emitted was too faint to be of any real use. No further research was conducted into this phenomenon then. But once again, the light emitted by this material was too faint to be of any practical use. Research was again stopped on this phenomenon. The work on the invention of the LED took many people and was spread over many years. Although LEDs did not become commercially available for a number of years, several people made some significant discoveries and improvements.
These early versions of these electronic components used a semiconductor made using gallium, arsenic and phosphorus - GaAsP. This produced a red light, and although the efficiency of the devices was low typically around 1 - 10 mcd at 20mA they started to be widely used as indicators on equipment. One of the first companies to manufacture LEDs on any scale was Monsanto. Monsanto was actually a company supplying the raw semiconductor materials.
They had aimed at working with Hewlett Packard - then a test equipment company - with Monsanto supplying the semiconductor and Hewlett Packard manufacturing the diodes. However the relationship did not work out and Monsanto ended up developing the LEDs themselves. The business was sold in to General Instrument.
With the original GaAsP devices being manufactured, the next development saw gallium phosphide devices developed. GaP devices were not widely used because the light they produced was at the far end of the red spectrum where the sensitivity of the human eye is low, and even though they produced a high output, the human perception was of a dim light.
As LEDs were developed, the light levels increased to the extent that they could be considered for applications outside simple indicator lamps. By the Hewlett Packard AlGaAs aluminium gallium arsenide diodes being produced were bright enough for use as electronic components within lighting applications.
Initially these diodes were used within the automotive industry where red LEDs were ideal for vehicle brake lights, and also for traffic lights.
Here the use of LEDs was of particular interest because of their increased reliability over the incandescent lights that had been previously used. Also further developments of these electronic components allowed the production of high output orange lamps. These were ideal for use as car direction indicators - again their reliability in being turned on and off as well as their efficiency proved to be a major improvement.
With the increasing use of LEDs as a result of their high efficiency and many other advantages, the history of the LED did not finish - more LED inventions were to come. In fact it is still very much an on going story. New developments and inventions are being made and LED technology is continuing to move into new areas with the development of organic LEDs and for their use with lighting. LEDs are now a well established form of electronic component used in many electronic circuit designs - they are used as small indicators as well as for lighting, both domestic and industrial.
Department of Energy, which encouraged further development of white LEDs for commercial and residential use. LEDs light-emitting diodes are the most energy efficient lighting option available. To produce the same amount of light as a watt incandescent bulb, an LED light only uses 10 watts. This is because LEDs use almost all of their energy as light, whereas incandescents give off most of their energy as heat. Like early versions of incandescent and fluorescent bulbs, they were once expensive and available in limited colors.
However, rapidly advancing technology has made them available at accessible prices, in a wide range of color temperatures, and with excellent CRIs color rendering indexes. The earliest commercial LEDs were only available in blue-white light. Soft white K is ideal for lobbies, guest spaces, and residential living areas. Bright white K is preferred for workspaces, like kitchens, garages, and warehouses.
Daylight K encourages productivity and is great for reading, working, and any spaces that require attentiveness and high energy.
A high CRI helps your eye differentiate between colors. CRI is measured on a scale of , with a perfect score of indicating colors appear as they would in natural sunlight. Lights with CRI ratings of eighty or above are considered acceptable for most applications.
Lights with CRI ratings of ninety or above are considered high, and are ideal for situations where color accuracy is crucial. With over two decades of lighting experience, TCP understands the importance of quality when it comes to lighting design, manufacturing, and installation.
Commercial Residential Distributor Hub 0 Items. So, where did it all begin? History of the First Light Bulb Why was the light bulb invented? Compact Fluorescent Lights Thomas Edison and Nikola Tesla both experimented with fluorescent lamps in the s, but early versions of fluorescent technology were too inefficient for commercial production.
0コメント