Rise of the Humble LED


	Rise of the Humble LED

abailart

12-7-2007 12:30 PM

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tags:

led technology

abailart says:

Blue christmas trees everywhere this year!

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/690fafe2-560c-409f-b2a7-d9decca00fc9/D314FEF7-0044-4A70-8B18-EBDB9A859D44/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://news.bbc.co.uk/1/hi/technology/7131358.stm" href="http://news.bbc.co.uk/1/hi/technology/7131358.stm" style="font-size: 11px;">news.bbc.co.uk</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/7131358.stm"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/news.bbc.co.uk/img/D7247E79-B17D-4335-A9CA-AB31055E24C0" alt="Christmas tree" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/7131358.stm"><FONT size="2"><B>They wink at us every day from computer screens and stereos. But the humble LED is heading for a brighter future.  </B>
</FONT><P>
<FONT size="2">New generation Light Emitting Diodes will purify water, make lights that mimic the colour of sunshine, and keep private data immune from hackers.     
</FONT></P><P>
<FONT size="2"></FONT></P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/7131358.stm">"LEDs have enormous benefits over standard light bulbs because they're a great deal more efficient, come in a range of different colours and have a very long lifetime. They are also good at saving energy too,"</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/7131358.stm"><P><FONT size="2">The colour of this light, and thus the LED, depends on the material that is used. Gallium arsenide gives off red light, while gallium nitride produced blue. 
</FONT></P><P>
<FONT size="2">"Blue LEDs were the holy grail for a long time,"</FONT></P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/7131358.stm">"It's especially exciting from a third world perspective because LEDs could run off solar power or even by some sort of clockwork mechanism. This would bring water purification to people in remote areas," </blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/7131358.stm">LEDs are currently expanding into the realms of computer security through a method known as quantum cryptography.</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/D314FEF7-0044-4A70-8B18-EBDB9A859D44/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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