Display device.html |
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A display device is an output 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 (aka refreshable Braille display) 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.
Common applications for electronic visual displays are television sets or computer monitors.
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Early devices
- Cathode ray tube (CRT)
- Bistable display
- Electronic paper
- Nixie tube displays
- Vector display
- Flat panel display
- Vacuum fluorescent display (VF)
- Light-emitting diode (LED) displays
- ELD
- Plasma display panels (PDP)
- Liquid crystal display (LCD)
- HPA display
- Thin-film transistor displays (TFT)
- Organic light-emitting diode displays (OLED)
- Surface-conduction electron-emitter display (SED) (experimental)
- Laser TV (forthcoming)
- Carbon nanotubes (experimental)
- Nanocrystal displays (experimental), using quantum dots to make vibrant, flexible screens.
- Head-mounted display
Paper
Projectors
- Film projectors
- Digital projector
- Laser projector
- Head-up display
- Further information: Projector
Three dimensional
- Swept-volume display
- Varifocal mirror display
- Emissive volume display
- Laser display
- Holographic display
- Further information: Volumetric display
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.
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
Misc
See also
- Comparison of display technology
- Large-screen television technology
- Video monitor
- Times Square, where numerous display devices can be seen in use
- Haptic technology
- Graphical user interfaces
- CAD
- Computer-controlled milling machines
- Rapid prototyping
- Digital image processing
- Vector graphics vs. Raster graphics
- Video card
- Graphics chip
- Computer graphics
External links
- Society for Information Display - An international professional organization dedicated to the study of display technology
- display-Magazine - The Online Magazine for Displays
- [1] - Solari di Udine
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