Display device

 ( Video Hardware ) 

A display device is an output device for presentation of information in visual or Touch form (the latter used for example in tactile electronic displays for blind people). When the input information that is supplied has an electrical signal the display is called an electronic display.

Common applications for electronic visual displays are or .

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Types of electronic displays

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In use These are the technologies used to create the various displays in use today.

• Liquid-crystal display (LCD)
• LED-backlit LCD
• TFT LCD
• Quantum dot (QLED) display
• LED display
• OLED
• AMOLED
• Super AMOLED display

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Segment displays Some displays can show only numerical digit 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 or LCD. They are mostly used in and pocket calculators. Common types are seven-segment displays which are used for numerals only, and alphanumeric fourteen-segment displays and sixteen-segment displays which can display numerals and Roman alphabet letters.

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Other types

• Vacuum fluorescent display
• Electroluminescent (ELD) display
• Plasma display
• Laser-powered phosphor display

were also formerly widely used.

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Full-area 2-dimensional displays 2-dimensional displays that cover a full area (usually a rectangle) are also called video displays, since it is the main modality of presenting video.

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Applications of full-area 2-dimensional displays Full-area 2-dimensional displays are used in, for example:

• Television set
• Computer monitor
• Head-mounted displays, and Virtual reality headsets
• Broadcast reference monitor
• (for mobile devices)
• Smartphone displays (for smartphones)

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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 (LED)
• Electroluminescent display (ELD)
• Electronic paper, E Ink
• Plasma display panel (PDP)
• Liquid-crystal display (LCD)
• High-performance addressing 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)
• (experimental)
• Quantum dot display (QLED)
• Interferometric modulator display (IMOD)
• Digital microshutter display (DMS)
• microLED (in development)

The multiplexed display technique is used to drive most display devices.

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Three-dimensional displays

• Swept-volume display
• Laser display
• Holographic display
• Light field displays
• Andotrope

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Mechanical types

• Ticker tape (historical)
• Split-flap display (or simply flap display)
• Flip-disc display (or flip-dot display)
• Vane display
• Rollsign
• 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.

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See also

• Comparison of CRT, LCD, plasma, and OLED displays
• Graphical user interfaces
• History of display technology
• User interface
• Input device
• Text display

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External links

• Society for Information Display - An international professional organization dedicated to the study of display technology
• 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.

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