What is a monitor?
Our article will be devoted to monitors. First, we will give a brief definition of what a monitor is, and then we will look at various monitors and talk about their features and internal structure.
What is the monitor for?
A monitor is a special device that graphically represents everything that a computer creates. The system works like this: a computer processor produces various information, which is then processed by the graphics processor and displayed in human-readable form on a monitor. This is the main and only function of the monitor - to make computer information accessible for perception.
What is the difference between monitors
To date, the market for computer technology, there are two main types of monitors: CRT and LCD. Let's start with older monitors, which, for the reasons given below, are not in a hurry to retire. CRT monitors have been known for quite some time. In fact, in Russian they are called EL monitors, that is, electron beam (CRT - Cathode Ray Tube, which means about the same thing).They are characterized by high image quality, and their main disadvantage is the large size, because of which they take up too much space on the table. Nevertheless, many designers prefer to work on such monitors, since they provide slightly better color reproduction. The second type of monitors, which appeared relatively recently, is LCD monitors, that is, liquid crystal (LCD - Liquid Crystal Display). These monitors are much more economical in terms of power consumption and space occupied on the desktop, but somewhat inferior to the EL monitors as a color rendition. However, if you are not a professional designer, you can safely buy an LCD monitor, since you will not see much difference in image quality.
What the monitor consists of
The LCD monitor consists of a special glass plate in which there are liquid crystals. This whole device is called an LCD matrix. In addition, the LCD monitor has light sources that make it possible for the user to see the image, the contact harness and the body, most often made of plastic. As you know, the screen consists of pixels, which are several layers of molecules located between the electrodes (transparent) and polarizing filters that transmit light.The device of the EL monitor is fundamentally different. It is similar to the device of old televisions, since the basis of such a monitor is a kinescope or a cathode ray tube. The kinescope is a sealed glass flask with a vacuum inside. The narrow part is the neck, the wide one is the screen. Inside the screen surface is covered with a special compound - a phosphor, which provides backlight. The phosphor is made on the basis of some rare earth metals, such as erbium or yttrium. Contrary to popular belief, phosphorus is not used in the manufacture of EL monitors and televisions. To make the image appear on the screen, they use the so-called electron gun, which spews a powerful stream of electrons. Getting to the inner surface of the screen, the electrons fall under the light of the phosphor dots, which makes the image visible to the human eye.