Visible light communication: Difference between revisions
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'''Visible Light Communications''', shortly VLC, is a [[next generation]]{{Clarifyme|date=February 2009}} communications medium using [[visible light]] between 400 [[Hertz|THz]] (780 nm; 1 THz = 1000 GHz) and 800 THz (375 nm), that is safe for eyes. |
'''Visible Light Communications''', shortly VLC, is a [[next generation]]{{Clarifyme|date=February 2009}} communications medium using [[visible light]] between 400 [[Hertz|THz]] (780 nm; 1 THz = 1000 GHz) and 800 THz (375 nm), that is safe for eyes. |
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It uses ordinary [[fluorescent |
It uses ordinary [[compact fluorescent lamp]]s to transmit signals at 10 kbit/s, or [[LED]]s for up to 500 Mbit/s. Specially designed electronic devices receive signals from such light sources. |
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This technology can be used as a communications medium for [[ubiquitous computing]], because lights are used everywhere. |
This technology can be used as a communications medium for [[ubiquitous computing]], because lights are used everywhere. |
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Revision as of 18:37, 31 January 2010
 | This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (February 2009) |
Visible Light Communications, shortly VLC, is a next generation[clarification needed] communications medium using visible light between 400 THz (780 nm; 1 THz = 1000 GHz) and 800 THz (375 nm), that is safe for eyes.
It uses ordinary compact fluorescent lamps to transmit signals at 10 kbit/s, or LEDs for up to 500 Mbit/s. Specially designed electronic devices receive signals from such light sources.
This technology can be used as a communications medium for ubiquitous computing, because lights are used everywhere.
History
First started at Nakagawa Laboratory, in Keio University, Japan in 2003.
Standardization process is conducted within IEEE Wireless Personal Area Networks working group (802.15).
In January 2010 a team of researchers from Siemens and Fraunhofer Institute for Telecommunications (Heinrich Hertz Institute in Berlin) demonstrated transmission at 500 MBit/s with a white LED over a distance of 5 metres (16 ft), and 100Mbit/s over longer distance using 5 LEDs.[1]
See also
External links
- VLC consortium
- IEEE 802.15 WPAN Task Group 7 (TG7) Visible Light Communication
Footnotes
- ^ "500 Megabits/Second with White LED Light" (Press release). Siemens. Jan 18, 2010.
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