PC Monitor Basics
A PC monitor has been an important section of computing for 30 years. Early green or amber on black monitors still makes me somewhat 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 going back few years in office and home use for multitude of reasons.
CRT PC Monitor
There's a pipe where 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 so it seems like a still picture. Designers still use CRT monitors because of their 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 pregnancy to screensavers. First screensavers had the sole intent behind moving an object around the screen to prevent permanent damage of the phosphorescent layer by exposing elements of the screen to the electron beam. In English still images liked to stay visible on a put off CRT PC monitor. gecey.com/transparent-monitor CRT monitors need a couple of minutes to reach operating temperatures so colors and brightness isn't perfect immediately after turning on.
TFT, also called LCD monitor is really a wafer of transparent transistors that let light pass or block it depending on voltage. Which means that these monitors don't work without light tube or LED black lighting. LED versions are taking market share especially in notebooks and Netbooks simply 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 several 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 certain proper geometry.
Touch screens are another great example of the many ups a TFT has. There's no curved glass screen underneath the touch panel to keep yourself updated of, touch sensors are very much easier to install.