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Display device

From Wikipedia, the free encyclopedia

Nixie tubes, LED display and VF display, top to bottom.
Nixie tubes, LED display and VF display, top to bottom.

A display device is an output device for presentation of information in visual[1] or tactile form (the latter used for example in tactile electronic displays for blind people).[2] When the input information that is supplied has an electrical signal the display is called an electronic display.

Common applications for electronic visual displays are television sets or computer monitors.

Types of electronic displays

In use

These are the technologies used to create the various displays in use today.

Cathode ray tubes were also formerly widely used.

Segment displays

Digital clocks display changing numbers.
Digital clocks display changing numbers.

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:

The common segment displays shown side by side: 7-segment, 9-segment, 14-segment and 16-segment displays.
The common segment displays shown side by side: 7-segment, 9-segment, 14-segment and 16-segment displays.

HD44780 LCD controller is a widely accepted protocol for LCDs.

Underlying technologies of segment displays

Full-area 2-dimensional displays

2-dimensional displays that cover a full area (usually a rectangle) are also called video displays, since it is the main modality of presenting video.

Applications of full-area 2-dimensional displays

Full-area 2-dimensional displays are used in, for example:

Underlying technologies of full-area 2-dimensional displays

Underlying technologies for full-area 2-dimensional displays include:

The multiplexed display technique is used to drive most display devices.

Three-dimensional displays

Mechanical types

See also

References

  1. ^ Lemley, Linda. "Chapter 6: Output". Discovering Computers. University of West Florida. Archived from the original on 14 June 2012. Retrieved 3 June 2012.
  2. ^ "Accommodations For Vision Disabilities". Energy.gov. Office of the Chief information Officer. Archived from the original on 9 June 2012. Retrieved 3 June 2012.

External links

This page was last edited on 19 September 2020, at 17:11
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