cathode-ray tube

cathode-ray tube
/kath"ohd ray'/
a vacuum tube generating a focused beam of electrons that can be deflected by electric fields, magnetic fields, or both. The terminus of the beam is visible as a spot or line of luminescence caused by its impinging on a sensitized screen at one end of the tube. Cathode-ray tubes are used to study the shapes of electric waves, to reproduce images in television receivers, to display alphanumeric and graphical information on computer monitors, as an indicator in radar sets, etc. Abbr.: CRT
[1900-05]

* * *

 Vacuum tube that produces images when its phosphorescent surface is struck by electron beams. CRTs can be monochrome (using one electron gun) or colour (typically using three electron guns to produce red, green, and blue images that, when combined, render a multicolour image). They come in a variety of display modes, including CGA (Color Graphics Adapter), VGA (Video Graphics Array), XGA (Extended Graphics Array), and the high-definition SVGA (Super Video Graphics Array).

* * *


Universalium. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • cathode ray tube — UK US noun [countable] [singular cathode ray tube plural cathode ray tubes] physics a piece of equipment in televisions and some computers that creates the image on the screen. A beam of high energy …   Useful english dictionary

  • cathode-ray tube — n a vacuum tube in which a beam of electrons is projected on a fluorescent screen to produce a luminous spot * * * a vacuum tube in which the cathode rays are accelerated as a beam to form luminous spots on a fluorescent screen …   Medical dictionary

  • cathode-ray tube — cathode ray tubes N COUNT A cathode ray tube is a device in televisions and computer terminals which sends an image onto the screen. [TECHNICAL] …   English dictionary

  • cathode ray tube — ► NOUN ▪ a high vacuum tube in which cathode rays produce a luminous image on a fluorescent screen, used in televisions and visual display units …   English terms dictionary

  • cathode ray tube — n a piece of equipment used in televisions and computers, in which ↑electrons from the cathode produce an image on a screen …   Dictionary of contemporary English

  • cathode ray tube — (CRT) vacuum tube which displays images when an electron beam falls on a phosphorescent surface (this technology is commonly used in computer monitors and televisions) …   English contemporary dictionary

  • cathode-ray tube — [kath′ōd′ rā΄] n. a vacuum tube in which a stream of electrons is electromagnetically focused on a fluorescent screen, producing lighted dots: such tubes are used as oscilloscopes and picture tubes: abbrev. CRT …   English World dictionary

  • Cathode Ray Tube —   [dt. »Kathodenstrahlröhre«], CRT …   Universal-Lexikon

  • cathode ray tube — cathode ray ,tube noun count SCIENCE a piece of equipment in televisions and computers that sends an image to the screen …   Usage of the words and phrases in modern English

  • Cathode ray tube — Cutaway rendering of a color CRT: 1. Three Electron guns (for red, green, and blue phosphor dots) 2. Electron beams 3. Focusing coils 4. Deflection coils 5. Anode connection 6. Mask for separating beams for red,… …   Wikipedia

  • cathode ray tube — UK / US noun [countable] Word forms cathode ray tube : singular cathode ray tube plural cathode ray tubes physics a piece of equipment in televisions and some computers that creates the image on the screen. A beam of high energy electrons is… …   English dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”