FiringSquad: Home of the Hardcore Gamer - Games, Hardware, Reviews and NewsSubmit your own or view users' CPU overclocking results!

  
 Home   News   THE MATRIX   Deals   Hardware   Games   Features   Media   Products   Forums   FS China 
AddThis Social Bookmark Button

Home : Guides : Choosing Components : How it Works: Monitors
» Join the Greatest Gaming Community NOW! (It's free)

Already a member? Login
 



Random Gallery >> 
Click to view high-res Image!
Crysis 3 Leaked Screenshots and Concept Art [6] (0)

My crank that S#!t Up entry! (13) by zin_onos
Blow That S#!t Up! (8) by Synchronous Failure
My Crank That Sh#!t Up! entry :D (3) by chipmunk995
My First Video (3) by Stryker
Superlative Computer (6) by arvernis
Drink That S#!t Up! (14) by p4l1ndr0m3
Nvidia+Socom Cranks that $#%^ UP!!!!! (4) by mrinfinit3
ENTRY FOR CONTEST (4) by Alexander470
Crank that s#!t up to 11!!! (14) by jarrodthome
Crankin' it up today... and tomorrow! (8) by Slipdisk

More Blogs >>




How it Works: Monitors
March 23, 2000   Chris Buck Buccola > [View My Other Articles]
Product Info | User Reviews | Article Images(2) | Image Gallery | Comments | Forum Thread
The Cathode Ray Tube

The CRT: A vacuum tube device in which an electron beam can be focused onto a small spot on a fluorescent screen at the opposite end of the structure; used in televisions and Oscilloscopes to form the display.

The Root of all Evil- The Electron Gun

At the heart of your monitor is the electron gun. The actual electron gun itself is really an internal component of the cathode ray tube (CRT), but it has fallen into common practice that both terms refer to the same device.

In essence, the electron gun is really nothing more than a big, powerful diode, passing electrons from one point to another (but not vice versa). The electron gun emits a stream of electrons at a screen made up of a matrix of photoconductive and photo-resistant layers. The beam of energy strikes the phosphor screen, which excites each individual phosphor and causes it to give off energy, making it glow. This makes up the visible display you are looking at right now. The device itself is amazingly complex, and yet is very reliable, offering many thousands of hours of operation without fail or error.

The Yolk

As previously stated, the reason why a CRT is so reliable is because the device contains very few moving parts. The yolk (also called the "deflection coil", "or deflection yoke") is positioned at the end of the electron gun's emitter. The yolk is an electronically controlled device that generates a strong magnetic field. The application or removal of current to yolk generates a magnetic field of varying intensity. The electron beam itself is aimed by electronic manipulation of that strong magnetic field. As the yolk's field interacts with the electron beam, it is deflected to make it sweep across the screen.

The problem here is that the beam can only be deflected in a limited range, so when the beam strikes a flat surface, the left and right edges of the image produced will look "warped". This occurs because the beam itself misses its target slightly, only partially energizing the phosphor it's supposed to hit.

Manufacturers remedy this problem by adding a slight curve to the screen surface to make it match the "sweep radius" of the electron gun so that it would hit it's mark more precisely. This of course, makes the screen more curved, but allows the image to match the dimension of the screen itself. This procedure is repeated many times, over and over again (525 times for television, varied for monitors based on current resolution)

Back! Page 1     Yellow and blue make green? Next!
Blog + Share: Digg Del.icio.us Reddit SU furl • More: AddThis Social Bookmark Button
Send This Article to a Friend!  
Table of Contents
  Print Entire Article  

MATRIX CONTENT » RANDOM MEDIA BLOG More Blogs >>
No ratings yet
» Please rate this
Read this Media-Blog entry!» Crank It Up! (11)
by Kilos (6) Talk with this user on their Shout Box (My other blogs) Posted 33 months ago


 Hottest Topics
Two new GRID 2 gameplay trailers speeding your way (1)
Minecraft PC sales surpass the 8 million mark (0)
New Grand Theft Auto 5 trailer debuts main characters (0)
Crysis 3 'The Fields' campaign gameplay trailer (0)
New Far Cry 3 trailer focuses on co-op campaign (0)
Today's News >>
Today's Siteseeing >>


 Table of Contents


 Random Fact
A "diode" is a semi-conductive, single PN junction device that allows energy to flow in one direction, but not the other. 0.7V is required to overcome the barrier potential of a diodes PN junction.


FiringSquad is powered by... Back to Top Site MapContact UsAdvertise With Us Privacy StatementAbout Us  
News RSSSiteseeing RSSArticle RSS   © 1998-2013 FS Media, Inc. All Rights Reserved