School administrators, teachers, and professors were among thousands at the InfoComm audio-video conference in Orlando June 15-19, where technology vendors unveiled the latest in digital signage hardware and software and LED projectors that could prove energy and cost efficient.

Projectors powered by LED (Light Emitting Diodes) technology, rather than the traditional lamp, have displayed longer life and usually require less maintenance than lamps, which often need replaced.

Some companies have introduced LED ultra-portable projectors, which weigh less than 4 pounds apiece, but LED projector costs have proven prohibitive during the current recession, according to an industry report published in March by Insight...

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