Editing Surface-conduction electron-emitter display (section)

{{Short description|CRT screen}}
[[Image:Surface-conduction electron-emitter display 2.png|thumb|right|Canon's 36" prototype SED, shown at the 2006 CES]]
[[Image:Sed1.png|thumb|right|Another view of the same display, showing what was a thin case at the time]]

A '''surface-conduction electron-emitter display''' ('''SED''') is a [[display technology]] for [[flat panel display]]s developed by a number of companies. SEDs uses nanoscopic-scale [[electron]] emitters to energize colored [[phosphor]]s and produce an image. In a general sense, a SED consists of a matrix of tiny [[cathode-ray tube]]s, each "tube" forming a single sub-pixel on the screen, grouped in threes to form red-green-blue (RGB) [[pixel]]s. SEDs combine the advantages of CRTs, namely their high [[contrast ratio]]s, wide [[viewing angle]]s, and very fast [[Response time (technology)|response times]], with the packaging advantages of LCD and other flat panel displays.

After considerable time and effort in the early and mid-2000s, SED efforts started winding down in 2009 as LCD became the dominant technology. In August 2010, [[Canon (company)|Canon]] announced they were shutting down their joint effort to develop SEDs commercially, signaling the end of development efforts.<ref>{{cite web|url=http://www.goodgearguide.com.au/article/357585/canon_signals_end_road_sed_tv_dreams/ |title=Canon signals end of the road for SED TV dreams |first=Martyn |last=Williams |publisher=IDG News Service |date=19 August 2010 |archive-url=https://web.archive.org/web/20220124123153/https://www.goodgearguide.com.au/article/357585/canon_signals_end_road_sed_tv_dreams/ |archive-date=24 January 2022 |url-status=usurped}}</ref> SEDs were closely related to another developing display technology, the [[field-emission display]], or FED, differing primarily in the details of the electron emitters. [[Sony]], the main backer of FED, has similarly backed off from their development efforts.<ref>{{cite web|url=http://www.crunchgear.com/2009/03/31/fed-sony-calls-it-quits-basically-burying-the-technology-as-a-whole/|title=FED: Sony calls it quits, basically burying the technology as a whole|first=Serkan|last=Toto|archive-url=https://web.archive.org/web/20090619135913/http://www.crunchgear.com/2009/03/31/fed-sony-calls-it-quits-basically-burying-the-technology-as-a-whole/|archive-date=19 June 2009|date=31 March 2009|url-status=dead}}</ref>