Criteria for a choice of the computer monitor
In this article we will talk nevertheless about on what basis of criteria follows, according to experts, to carry out a choice of the computer monitor. At once we will make a reservation that this element is one of the most important as in many respects defines degree of comfort of work of the user. Strained вглядывание in the image on the monitor within several hours can turn back fast exhaustion, overall performance decrease, and also, in case of the poor-quality equipment, sight deterioration. To struggle with the listed negative moments it is necessary in two ways: in the end of each business hour behind the monitor to arrange gymnastics for eyes, and also to establish that type of the display which brings is minimum notable discomfort.
The choice of certain model of the monitor as depends on the user plans to solve what problems in the future by means of the computer: for example, one requirements are shown to the monitor in case of work in office applications, absolutely others - at frequent viewing of video, the third - at professional processing of graphic representations.
Further in brief we will list those basic criteria on which the monitor can be estimated.
First, cost. This indicator will affect choice ЭЛТ or ЖК the monitor, and also on size of a diagonal of the display. Secondly, frequency of vertical and horizontal marking - the this indicator above, the will be better quality of representation of the image on the screen. Thirdly, the permission of the monitor or, in other words, the size of a step of a point. We will notice that today there are standard indicators of the permission and frequency which are recommended by manufacturers of monitors for work of the average user. For example, at frequency from 85 to 100 Hz for the screen with a diagonal in 15 inches such standard permission will be 800Х600 pixels, and for the screen with a diagonal in 17 inches - 1024Х768 points. It is necessary to choose that model of the monitor which in comparison with other at the identical set expansion it is characterised by higher frequency.
Important criterion is level of safety of the monitor. Today there are some standards of safety of the such equipment, on conformity which will inform marks on the got monitor. The most rigid requirements to ergonomic parametres of the display and level of its safety for organs of vision are shown by the international standard ISO 9241-3. Besides, in the instruction internal standards of any certain country, for example, MPR 1990:10 for Sweden, or region, for example, EN 55022 - the European standard defining admissible values of radiation of the equipment, connected with an information technology can be mentioned.
Besides, it is necessary to pay attention to such aspects as presence at the monitor antistatic and антибликового of coverings, presence at any image of visual defects (distortions, colour strips, divorces, intensity differences, absence of focusing, that is an illegibility of objects), and also brightness and contrast (the given parametres can be adjusted according to individual wishes of the user). Subjective criterion of an estimation of quality of the monitor is "readership" of the image, that is quality of its perception the concrete user.
