References
http://www.vegasledscreens.com/faq/48-what-is-a-led-screen.html
http://www.barco.com/en/Products-Solutions/LED-displays/Indoor-LED-displays
http://www.ebay.com/gds/What-Are-the-Different-Types-of-LED-TVs-/10000000177630848/g.html
http://www.pantherproducts.co.uk/index.php?pageid=ledmonitor
http://www.svetodiodka.com/techscreen/
http://electronics.howstuffworks.com/led.htm
http://www.ehow.com/info_8320683_definition-led-tv.html
http://www.ledinside.com/knowledge/2008/4/The_Components_and_Structure_of_LED_Screens_20080423