Display device

Adisplay deviceis anoutput devicefor presentation ofinformationinvisual^[1]ortactileform (the latter used for example intactile electronic displaysfor blind people).^[2]When the input information that is supplied has an electrical signal the display is called anelectronic display.

Common applications forelectronic visual displaysaretelevision setsorcomputer monitors.

Types of electronic displays

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

Digital clocks display changing numerals

The common segment displays shown side by side:7-segment,9-segment,14-segmentand16-segmentdisplays

Some displays can show onlydigitsorAlpha numericcharacters. They are calledsegment displays,because they are composed of several segments that switch on and off to give appearance of desiredglyph.The segments are usually singleLEDsorliquid crystals.They are mostly used indigital watchesandpocket calculators.Common types areseven-segment displayswhich are used for numerals only, and Alpha numericfourteen-segment displaysandsixteen-segment displayswhich can display numerals and Roman Alpha bet letters.

Cathode-ray tubeswere also formerly widely used.

2-dimensionaldisplays that cover a full area (usually arectangle) are also calledvideo displays,since it is the main modality of presentingvideo.

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

Underlying technologies for full-area 2-dimensional displays include:

Themultiplexed displaytechnique is used to drive most display devices.

Ticker tape(historical)
Split-flap display(or simplyflap display)
Flip-disc display(or flip-dot display)
Vane display
Rollsign
Tactile electronic displaysare 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.

^Lemley, Linda."Chapter 6: Output".Discovering Computers.University of West Florida.Archivedfrom the original on 14 June 2012.Retrieved3 June2012.
^"Accommodations For Vision Disabilities".Energy.gov.Office of the Chief information Officer.Archivedfrom the original on 9 June 2012.Retrieved3 June2012.

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.