Video display

A display device 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.

Nixie-tubes, LED-display and VF-display

Common types of display devices are:

• Analog electronic displays
  • CRT display (earlier)
• Digital electronic displays
  • Electronic paper
  • Nixie tube displays (now obsolete)
  • VF display
  • LED displays (later)
  • PDP
  • LCD (most recent)
    • HPA display
    • TFT display
  • OLED (forthcoming)
  • Carbon nanotubes (experimental)
• 3D displays
• Head-mounted display
• Projectors
  • Film projectors
    • Movie projector
    • Slide projector
  • Digital projectors
    • Digital projector
• Several obsolete mechanical types, such as:
  • Ticker tape
  • "Departure board" display (see talk page)
• Refreshable Braille display

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: computer display, graphical output device

External links

• Projection Screens Projection Screens Come in a Multitude of Styles and Models (theprojectorpros.com)