“Our customers have made it clear that they want the greenest technology possible,” Jeff Clarke, senior vice president, Dell Product Group said during the company’s mobility summit in Monte Carlo today. “As an industry, we can shape the future of green innovation and significantly reduce the carbon footprint associated with mobile computing. Dell is committed to leading the transition to energy-efficient LED technology.”
The "LED technology" which Clarke speaks of is none other than a light-emitting diode.
A light emitting diode is essentially a two-layered semiconductor—-it has both a p-type and a n-type semiconductor in a circuit. While current flows through the semiconductors, electrons from the conduction band of the n-type move towards the holes present in the p-type. As a result, the energy of the electron drops, and a photon is released with energy equivalent to the energy difference between the conduction to valence bands.
Fast forward to today, where owning a LED laptop is no longer an uncommon feat. This is great news for the environmentalists, as the benefits of LED technology seem endless:
"In addition to being mercury-free and highly recyclable, LED displays deliver significant energy savings compared to cold cathode fluorescent lamp (CCFL) technology. For example, Dell’s 15-inch LED displays consume an average of 43 percent less power at maximum brightness, resulting in extraordinary cost and carbon savings. The company estimates customer savings of approximately $20 million and 220 million kilowatt-hours in 2010 and 2011 combined, the equivalent of annual CO2 emissions resulting from energy use of more than 10,000 homes1."
I applaud Dell and its management in attempting to become the "Greenest Technology Company on the Planet."
source: http://www.dell.com/content/topics/global.aspx/corp/pressoffice/en/2008/2008_09_24_rr_000?c=us&l=en
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