Computer Monitors

The visual display unit, commonly called a monitor is an electrical device which displays various images and pictures. These pictures are displayed from the video output of electronic devices such as computers. It does not produce any permanent image. Most of the latest models of monitors comprise a TFT LCD while the older monitors are based on a cathode ray tube (CRT). Nowadays, most of the monitors sold in the market are of LCD (liquid crystal display).

The computer monitor consists of a picture tube coupled with a simple circuitry which helps to generate images sent in the form of electronic beams via an electron gun on a sensitive phosphor layer on the picture tube. The image which is in the form of electronic data (1 & 0, or on and off) are sent from the computer to the monitor. There are mainly two different types of monitors, namely, the CRT monitors and the LCD monitors. Although the LCD monitors have advanced manifold, there are many who still prefer the CRT monitors.  CRT monitors are bigger in size and they are much bulkier in comparison to a LCD.

These CRTs tend to consume more electric power and these are prone to screen flickers. Nonetheless, the LCD monitors cost more than the CRTs due to its advanced and latest technological set up. CRT technology has been in use for years now. These CRT monitors functions by moving an electron beam to and fro at the back of the picture tube upon a special phosphor coating which gets illuminated when struck by the electron beams.
An LCD screen has two sheets which are of polarizing material and it has a liquid crystal solution between these sheets.

When an electric current passes through these sheets, the crystals get aligned and arranged. These crystals act as shutters, either allowing the light to pass through them or completely blocking the light. Both the CRT as well as the LCD offers vibrant, dazzling and bright color displays. Nonetheless, an LCD monitor cannot project the maximum color range which a CRT monitor can. As far as the image sharpness is concerned, when an LCD screen runs at its native resolution, the picture quality is absolutely sharp and clear. In contrast to this, the picture quality and its sharpness can be disturbed and blemished with a flawed focus or even with soft edges in CRTs.

Another important characteristic of these monitors is when a CRT functions, the monitor can be viewed from various angles without any haziness or vagueness. However, when a LCD is viewed from a distance or from a different angle, the picture looks distorted. When purchasing a CRT monitor, people mostly prefer a 17-inch screen size, though only 16.1 inch or a bit more actual viewing can be enjoyed. This is primarily due to the large frame of the monitor.  On the other hand, if a 17 inch LCD screen is viewed, one would actually get to view a full 17 inch screen. Thus, there are many factors which differentiate a CRT and a LCD monitor, however, the latest preference of people is the LCD computer monitors, although they are a bit costlier than the CRTs.