DISPLAY DEVICE


Nixie tubes, LED-display and VF display

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


Digital clock's display changing numbers.


Electronic paper

Nixie tube displays

VF display

LED displays (later)

ELD

Plasma display panels (PDP)

Liquid crystal displays (LCD) (most recent)


HPA display


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

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