By Aloysius Low Find out more about these often seen but mostly ignored outdoor advertising LED screens and the technology behind them.

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Source:: http://cnet.com.feedsportal.com/c/34938/f/645093/s/423bda46/sc/15/l/0L0Scnet0N0Cnews0Ctake0Ea0Epeek0Ebehind0Ethe0Egiant0Eled0Edisplays0C0Tftag0FCAD590Aa51e/story01.htm