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Evolution of the Solar Powered LED
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Gas Discharge Lamp
The glass discharge lamp was first demonstrated in 1705 by Francis Hauksbee, an English scientist. The technology was first discovered in 1675, however, by French astronomer Jean-Felix Picard. It generates light by creating an electrical discharge through an ionized gas. There are three types, high pressure discharge lamps, low pressure discharge lamps, and high-intensity discharge lamps. -
Gas Discharge Lamp Cite
APA Citation:Lazardis, G. (2011, May 30). How Gas Discharging Lamps work (Cold Cathode CCFL and Hot Cathodes). How Gas Discharging Lamps Work (Cold Cathode CCFL and Hot Cathodes). Retrieved October 2, 2012, from http://pcbheaven.com/wikipages/How_Gas_Discharging_Lamps_work/ -
Arc Lamp
The arc lamp produces light by the sparks produced from the high current between two electrodes, usually carbon rods. It was created in 1810 by English physicist Sir Humphry Davy. It became practical for general usage when sufficient electric generators were made in 1870. Pavel Yablochkov, a Russian engineer, created the Yablochkov candle in 1876, which was used for street lighting in Paris and other European cities beginning in 1878. -
Arc Lamp Cite
APA Citation:Lazardis, G. (2011, May 30). How Gas Discharging Lamps work (Cold Cathode CCFL and Hot Cathodes). How Gas Discharging Lamps Work (Cold Cathode CCFL and Hot Cathodes). Retrieved October 2, 2012, from http://pcbheaven.com/wikipages/How_Gas_Discharging_Lamps_work/ -
Incandescent Light Bulb
The incandescent light bulb was first invented by Henry Woodward and Matt Evans in 1874. They did not have enough funding to commercialize it, though. Thomas Edison did, and he bought their patent in 1879. Joseph Swan, a British physicist and chemist, was also working on the light bulb at the same time, and his house was the first to be lit by a lightbulb. This works by heating a filament wire to extreme temperatures by running a current through it, which causes it to glow, called incandescence. -
Incandescent Light Bulb Cite
APA Citation:Bellis, M. (n.d.). The History of the Incandescent Lightbulb. The History of the Incandescent Lightbulb. Retrieved October 2, 2012, from http://inventors.about.com/library/inventors/bllight2.htm -
Fluorescent Lamp
The fluorescent lamp was created in 1896 by American inventor Thomas Edison, but that model wasn’t granted a patent until 1907 and was never put into production. In 1895, a former employee of his, Daniel McFarlan Moore, created lamps 2-3 meters long, that used carbon dioxide or nitrogen to emanate white or pink light. On December 10, 1926, Edmund Germer,a German inventor, patented the fluorescent lamp with two other men. Fluorescent lamps work by using electricity to excite mercury vapor, which -
Fluorescent Lamp Cite
APA Citation:Goldwasser, S. M. (1999). Sam's F-Lamp FAQSIZEFluorescent Lamps, Ballasts, and Fixtures. Fluorescent Lamps, Ballasts, and Fixtures. Retrieved October 2, 2012, from http://donklipstein.com/f-lamp.html -
LED Light
The 1st LED was made in 1927 by Oleg Vladimirovich Losev, a Russian scientist. This version never made it to commercial marketing, however. The first practical LED light came in 1962, created by Nick Holonyak Jr, an American scientist, while working at GE. He is nicknamed the “father of the LED”. LED lights are called semiconductors. It works is that a light-emitting diode is switched on, and electrons are able to reconnect with the electron holes, which releases photons, creating visible light. -
LED Light Cite
APA Citation:Goldwasser, S. M. (1999). Sam's F-Lamp FAQSIZEFluorescent Lamps, Ballasts, and Fixtures. Fluorescent Lamps, Ballasts, and Fixtures. Retrieved October 2, 2012, from http://donklipstein.com/f-lamp.html -
Solar Powered LED
In 1963, Solar powered lights are made of an LED lamp, a photovoltaic solar panel, and a rechargeable battery. The solar panel turns light into energy through the photovoltaic effect, which is the creation of voltage or electric current when a material is exposed to a light source. In the photovoltaic effect, electrons are transferred between valence and conduction bands, and therefore voltage is built up between 2 electrodes. -
Solar Powered LED Cite
APA Citation:Goldwasser, S. M. (1999). Sam's F-Lamp FAQSIZEFluorescent Lamps, Ballasts, and Fixtures. Fluorescent Lamps, Ballasts, and Fixtures. Retrieved October 2, 2012, from http://donklipstein.com/f-lamp.html
