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{{Short description|Output device for presentation of information in visual form}}
{{redirects|Display technologies|the defunct company|Display Technologies, Inc.}}
{{Multiple issues|{{More citations needed|date=April 2023}}
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[[Image:Anzeigen(Displays).jpg|240px|thumb|[[Nixie tube]]s, [[LED]] display and [[Vacuum fluorescent display|VF display]], top to bottom]][[File:Fallblattanzeigetafel ausschnitt ffm hbf.jpg|thumb|Display board at [[Frankfurt (Main) Hauptbahnhof]] (2005)]]
A '''display device''' is an [[output device]] for presentation of [[information]] in [[visual]]<ref name="University of West Florida">{{cite web|last=Lemley|first=Linda|title=Chapter 6: Output|url=http://uwf.edu/clemley/cgs1570w/notes/Concepts-6.htm|work=Discovering Computers|publisher=University of West Florida|access-date=3 June 2012|url-status=live|archive-url=https://web.archive.org/web/20120614152622/http://uwf.edu/clemley/cgs1570w/notes/Concepts-6.htm|archive-date=14 June 2012}}</ref> or [[Touch|tactile]] form (the latter used for example in [[Refreshable Braille display|tactile electronic displays]] for blind people).<ref name="Office of the Chief information Officer">{{cite web|title=Accommodations For Vision Disabilities|url=http://energy.gov/cio/accommodations-vision-disabilities|work=Energy.gov|publisher=Office of the Chief information Officer|access-date=3 June 2012|url-status=live|archive-url=https://web.archive.org/web/20120609151025/http://energy.gov/cio/accommodations-vision-disabilities|archive-date=9 June 2012}}</ref> When the input information that is supplied has an electrical signal the display is called an ''[[Electronic visual display|electronic display]]''.
 
Common applications for ''[[electronic visual display]]sdisplays'' are [[television set]]s or [[computer monitor]]s.
 
== Types of electronic displays ==
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These are the technologies used to create the various displays in use today.
 
* [[Liquid -crystal display]] (LCD)
** [[LED-backlit LCD|Light-emitting diode (LED) backlit LCD]]
** [[TFT LCD|Thin-film transistor (TFT) LCD]]
** [[Quantum dot display|Quantum dot (QLED) display]]
* [[LED display|Light-emitting diode (LED) display]]
** [[OLED|OLED display]]
** [[AMOLED|AMOLED display]]
** [[AMOLED#Super AMOLED|Super AMOLED display]]
 
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[[Image:Digital clock changing numbers.jpg|thumb|right|300px|Digital clocks display changing numerals]]
[[File:Common segment displays.svg|right|thumb|The common segment displays shown side by side: [[Seven-segment display|7-segment]], [[Nine-segment display|9-segment]], [[Fourteen-segment display|14-segment]] and [[Sixteen-segment display|16-segment]] displays]]
Some displays can show only [[numerical digit|digits]] or [[alphanumeric]] characters. They are called '''segment displays''', because they are composed of several segments that switch on and off to give appearance of desired [[glyph]]. The segments are usually single [[LED]]s or [[LCD|liquid crystals]]. They are mostly used in [[digital watch]]es and [[pocket calculator]]s. Common types are [[seven-segment display]]s which are used for numerals only, and alphanumeric [[Fourteen-segment display|fourteen-segment displays]] and [[sixteen-segment display]]s which can display numerals and Roman alphabet letters.
 
=== Other types ===
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* [[Electroluminescent display|Electroluminescent (ELD) display]]
* [[Plasma display|Plasma (PDP) display]]
* [[Laser-powered phosphor display]]
 
[[Cathode-ray tube]]s were also formerly widely used.
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===== Underlying technologies of full-area 2-dimensional displays =====
Underlying technologies for full-area 2-dimensional displays include:
* [[Cathode -ray tube]] display (CRT)
* [[LED display|Light-emitting diode display]] (LED)
* [[Electroluminescent display]] (ELD)
* [[Electronic paper]], [[E Ink]]
* [[Plasma display]] panel (PDP)
* [[Liquid-crystal display|Liquid crystal display]] (LCD)
** [[High-Performanceperformance Addressingaddressing]] display (HPA)
** [[Thin-film transistor]] display (TFT)
* [[Organic light-emitting diode]] display (OLED)
* [[Digital Light Processing]] display (DLP)
* [[Surface-conduction electron-emitter display]] (SED) (experimental)
* [[Field -emission display]] (FED) (experimental)
* [[Laser TV]] (forthcoming)
* [[Carbon nanotube]]s (experimental)
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* [[Laser display]]
* [[Holographic display]]
* [[Light field display|Light field displays]]
 
{{Further|Volumetric display}}
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* [[Split-flap display]] (or simply [[flap display]])
* [[Flip-disc display]] (or flip-dot display)
* [[Vane display]]
* [[Destination sign#Rollsign|Rollsign]]
* [[Refreshable Braillebraille display|Tactile electronic displays]] are usually intended for the blind. They use electro-mechanical parts to dynamically update a tactile image (usually of text) so that the image may be felt by the fingers.
** [[Optacon]], using metal rods instead of light in order to convey images to blind people by tactile sensation.
 
== See also ==
{{Portal|Electronics}}
* [[Comparison of CRT, LCD, Plasmaplasma, and OLED displays]]
* [[Graphical user interface]]s
* [[History of display technology]]
* [[Human machineUser interface]]
* [[Input device]]
* [[Text display]]
 
 
== References ==
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==External links==
{{Commonscat|Display devices}}
{{Commons category|Displays}}
* [http://www.sid.org Society for Information Display] - An international professional organization dedicated to the study of display technology
* [https://www.uwaterloo.ca/stratford-campus University of Waterloo Stratford Campus] - A university that offers students the opportunity to display their work on the school's 3-storey Christie MicroTile wall.
 
{{Display technology}}
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