PC Monitor Basics

A PC monitor has been an essential part of computing for 30 years. The first green or amber on black monitors still makes me a little nostalgic, but 30 years have passed since they were cutting edge. Let's jump to 2010, age flat screens and OLED displays.

We've two common technologies with a market share worth mentioning. CRT and TFT, though TFT has been the major player for the last several years in office and home use for great number of reasons.

CRT PC Monitor

There's a pipe by which a beam of electrons is accelerated and aimed by electromagnetic fields and driven against a layer of glass cured with a phosphorescent substance. This electron beam draws the picture on the screen by being diverted to scan left-right up and down so fast that it looks like a still picture. Designers still use CRT monitors for his or her superb color representation and almost infinite contrast ratio, though a 21" monitor is about 55 pounds in weight and that paired with a 195W maximum power consumption somewhat hinders practicality in a home environment. Old CRTs were more likely to burn-in therefore having a baby to screensavers. First screensavers had the sole intent behind moving an item round the screen to avoid permanent damage of the phosphorescent layer by exposing elements of the screen to the electron beam. In English still images liked to keep visible on a put off CRT PC monitor. CRT monitors need a few minutes to attain operating temperatures so colors and brightness is not perfect immediately after turning on.

TFT Monitor

TFT, also known as LCD monitor is just a wafer of transparent transistors that let light pass or block it based on voltage. Which means these monitors don't work without light tube or LED black lighting. LED versions are taking market share especially in notebooks and Netbooks because they -compared to traditional TFT- are consuming less power and light bleeding on edges and in corners aren't so severe, causing better colors. Just to say a couple of advantages TFT has over CRT:

-Depth is fraction of CRT, thus minimal space used

-Power consumption can also be half or one third of a CRT at most, less for LED backlit models

-Wider range of connection, including digital signal to make sure proper geometry.

Touch screens are another great example of the numerous ups a TFT has. There's no curved glass screen beneath the touch panel to keep yourself informed of, touch sensors are so much easier to install.

  • Love
  • Save
    Add a blog to Bloglovin’
    Enter the full blog address (e.g.
    We're working on your request. This will take just a minute...