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A 'display device', also known as an 'information display' is a device for visual or tactile presentation of images (including text) acquired, stored, or transmitted in various forms. While most common displays are designed to present information dynamically in a visual medium, tactile displays, usually intended for the blind or visually impaired, use mechanical parts to dynamically update a tactile image (usually of text) so that the image may be felt by the fingers.
To reduce cost, displays with more than 2 digits are almost invariably constructed using a multiplexed display technique.
Here are the common types of display devices :

Contents

Analog electronic displays

Digital electronic displays

Projectors

Mechanical types

Refreshable Braille display

Idiot lights

Segment displays

See also

External links

Analog electronic displays

★ Cathode ray tube (CRT) (earlier)

Digital electronic displays

★ Electronic paper

★ Nixie tube displays

★ VF display

★ LED displays (later)

★ ELD

★ Plasma display panels (PDP)

★ Liquid crystal displays (LCD) (most recent)

★
★ HPA display

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★ Thin-film transistor displays (TFT) display

★ Organic light-emitting diode displays (OLED) (forthcoming)

★ SED (forthcoming)

★ Laser TV (forthcoming)

★ Carbon nanotubes (experimental)

★ Nanocrystal displays (experimental)- Using quantum dots to make vibrant, flexible screens.

Projectors

★ Film projectors

★
★ Movie projector

★
★ Slide projector

★ Digital projectors

★
★ Digital projector

Mechanical types

★ Ticker tape (historical)

★ Split-flap display (or simply flap display)

★ flip-disc display (or flip-dot display)

★ Rollsign

Refreshable Braille display

See also Optacon.

Idiot lights

The "Check Engine" light on an automobile dashboard is the quintessential idiot light, giving only the information that something is amiss, but not what particular subsystem or component, nor how urgent the problem is. Neither does it give any information about issues that may be still within acceptable limits, but trending towards failure. If the idiot light itself has failed, it will give no indication that it has done so.

Segment displays

Some displays can show only 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 LEDs or liquid crystals. They are mostly used in digital watches and pocket calculators. There are several types:

★ Seven segment display (most common, digits only)

★ Fourteen segment display

★ Sixteen segment display

See also

★ Large-screen television technology

★ Computer display

★ Graphical output device

★ Television

★ Video monitor

★ Times Square, where numerous display devices can be seen in use

★ Comparison of display technology

External links

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

★ Future Displays News All about future display technologies

★ displayMagazin The online magazine for displays

★ The Cutting Edge of Haptics An article in MIT's Technology review about new touch illusion display technology, by Duncan Graham-Rowe.

★ The International Society for Haptics

★ Definitions of Projector Display Types