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A display device is a device for presentation of information for visual or tactile reception, acquired, stored, or transmitted in various forms. When the input information is supplied as an electrical signal, the display is called "electronic display". Electronic displays are available for presentation of visual and tactile information.

Tactile electronic displays are usually intended for the blind or visually impaired, they use electro-mechanical parts to dynamically update a tactile image (usually of text) so that the image may be felt by the fingers.

Here are the common types of display devices:

Contents 1 Analog electronic displays 2 Digital electronic displays 3 Projectors 4 Mechanical types 5 Refreshable Braille display 6 Idiot lights 7 Segment displays 8 See also 9 External links

• Cathode ray tube (CRT) (earlier)

• Bistable display
• 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.

• Film projectors
  • Movie projector
  • Slide projector
• Digital projectors
  • Digital projector

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

See also Optacon.

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.

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

• 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
• Haptic technology

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

v • d • e Display technology
Non-video	Electronic paper · Flip-dot display · Split-flap display
Video	Cathode ray tube · Digital light processing · Field emission display · Laser TV · (Organic) light-emitting diode Liquid crystal display · Plasma display · Surface-conduction electron-emitter display · Vacuum fluorescent display
3D display	Stereoscopic · Autostereoscopic · Volumetric · Laser beam
Static media	Hologram · Movie projector · Neon sign · Slide projector