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Jumbotron
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==Specifications of production and design== [[File:Pelican Barge, Darling Harbor, Sydney, NSW, AU.jpg|thumb|An LED jumbotron display aboard a pelican barge.]] Originally, the JumboTron was not an [[LED display]], since [[blue LED]]s were unavailable at the time, and the only green LEDs available were of the traditional yellow-green variety, which were unsuitable for an [[RGB]] display. Each display consisted of multiple modules composed of 16 or more small flood-beam [[cathode-ray tube]]s (CRTs), each of which included from 2 to 16 pixels composed of red, green, and blue [[Phosphor|phosphors]]. Sony displayed one of the earliest versions at the [[Expo '85]] [[World's Fair]] in [[Tsukuba, Ibaraki|Tsukuba]]. Eventually, JumboTron systems adopted LED technology as blue and pure green LEDs were developed.<ref>{{Cite web |last=XP |first=Stellar |date=2024-01-20 |title=Jumbotron Rental For Small Business Advertising |url=https://www.stellarxp.com/blog/the-top-benefits-of-using-jumbotron-rental-for-small-business-advertising |website=Stellar XP}}</ref> LED-based systems have about ten times the lifespan of CRT-based systems, a key reason for the change.
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