Editing Cathode-ray tube (section)

===Flood-beam CRT===
{{Main|Electron-stimulated luminescence}}
Flood-beam CRTs are small tubes that are arranged as pixels for large [[video wall]]s like [[Jumbotron]]s. The first screen using this technology (called [[Diamond Vision]] by Mitsubishi Electric) was introduced by [[Mitsubishi Electric]] for the [[1980 Major League Baseball All-Star Game]].<ref>{{Cite web|url=https://signsofthetimes.com/new-york-yankees-choose-mitsubishi-electric-diamond-vision/|title=New York Yankees Choose Mitsubishi Electric Diamond Vision|first=Jacob|last=Rieskamp|date=27 March 2009|website=Signs of the Times}}</ref><ref>{{cite web
|url=https://www.mitsubishielectric.com/sites/news/2018/pdf/0308.pdf|title=Mitsubishi Electric Receives IEEE Milestone for Outdoor Large-Scale Color Display System |website=mitsubishielectric.com|access-date=27 March 2024}}</ref> It differs from a normal CRT in that the electron gun within does not produce a focused controllable beam. Instead, electrons are sprayed in a wide cone across the entire front of the phosphor screen, basically making each unit act as a single light bulb.<ref>{{cite web|url= http://www.decadecounter.com/vta/articleview.php?item=947|title= Futaba TL-3508XA 'Jumbotron' Display|date= 11 March 2010|access-date= 19 December 2014|website= The Vintage Technology Association: Military Industrial Electronics Research Preservation|publisher= The Vintage Technology Association|archive-date= 19 December 2014|archive-url= https://web.archive.org/web/20141219191429/http://www.decadecounter.com/vta/articleview.php?item=947|url-status= usurped}}</ref> Each one is coated with a red, green or blue phosphor, to make up the color sub-pixels. This technology has largely been replaced with [[light-emitting diode]] displays. Unfocused and undeflected CRTs were used as grid-controlled [[Strobe light|stroboscope lamps]] since 1958.<ref>{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/sheets/074/c/CL60.pdf |publisher=[[Ferranti]], Ltd. |title=''Vacuum light sources — High speed stroboscopic light sources'' data sheet |date=August 1958 |access-date=7 May 2017 |archive-date=20 September 2016 |archive-url=https://web.archive.org/web/20160920125303/http://www.mif.pg.gda.pl/homepages/frank/sheets/074/c/CL60.pdf |url-status=dead }}</ref> [[Electron-stimulated luminescence]] (ESL) lamps, which use the same operating principle, were released in 2011.<ref>{{Cite web|url=https://gadgetwise.blogs.nytimes.com/2011/04/04/vu1-light-bulb-delayed-again/|title=Vu1 Light Bulb Delayed (Again)|first=Eric A.|last=Taub|date=4 April 2011}}</ref>