Comparison Acer Nitro KG270M3bipx 27 " black vs Acer Nitro VG270M3bmiipx 27 " black

— Monitor. In this case, we mean monitors designed mainly for classic use — as a screen for a personal computer. Their functionality can be quite diverse — from entry-level screens with 1-2 inputs for connection to multifunctional models with built-in speakers, TV tuners, remote controls, etc. The same applies to the diagonal. Most traditional monitors are in the 22-30" range (these sizes are currently considered optimal for screens whose distance is determined by the width of the desktop), but there are also large-format devices whose diagonal can exceed 32".

— Portable monitor. A separate caste of monitors designed to connect to laptops. They are distinguished by small diagonal sizes, not exceeding 18", a thin format and the absence of a stand, as a result of which they look like tablets.

— Game monitor. Monitors considered optimal for gaming. These are not necessarily devices specially designed for this application (although there are some); however, all gaming monitors have a number of features that gamers will surely appreciate. Firstly, the resolution (see below) in such models is not lower than Full HD. Secondly, the matrices have a low response time — less than 5 ms, which allows high-quality display of dynamic scenes; and the frame rate often reaches 120 Hz or even more (although there are quite modest values). Thirdly, devices of this type often have special gaming (see below...) and similar features — in particular, most gaming monitors are compatible with FreeSync and/or G-Sync technologies (see "Features").

— LCD panel. One of the key features that distinguish LCD panels from conventional monitors is the wide variety of connectors: in addition to video outputs, it includes auxiliary ports such as LAN or RS-232 (see "Connectors (Optional)"). It is also believed that the LCD panel must be hung on the wall without fail, but this has its own specifics. Many devices of this type are really made only for wall installation, and some models can be combined into a video wall that broadcasts one image to several screens. But besides this, there are solutions equipped with stands and allowing desktop use (and sometimes even originally designed for it). At the same time, the first variety, "purely wall-mounted", can have almost any diagonal — including modest 21 – 22 "; but the dimensions of "desktop" panels start at 32", moreover, they most often have advanced matrices like IPS. Anyway, such screens are used mainly in rather specific areas. So, wall mounting is convenient for organizing information boards at stations, airports, shopping centers, for use at exhibition stands, conference rooms, etc. Desktop models are useful for those for whom large size and high image quality are of key importance . Also among them there are many devices with touch screens, which further expands the user experience.

— Plasma panel. These types of devices are similar in many ways to the LCD panels described above, but they also have some key differences. The main one is the technology used for the screen: instead of a liquid crystal matrix, plasma panels use cells filled with a special gas and covered with a luminous substance — a phosphor. This technology provides very high image quality, with deep colour reproduction and contrast. At the same time, it is not easy to create a small plasma cell, which is why the pixels on this type of screens have more stringent restrictions on the minimum size. As a result, plasma panels, in principle, are never small — 42 "is considered almost the minimum size for such a screen. In addition, the reverse side of the described advantages is also a slightly shorter service life and higher cost than LCD matrices. As a result," plasma" has not received much distribution, such devices are bought mainly not for "public", but for personal use — for example, as a home theater screen or as equipment for an advanced gamer.

— Video wall. Models designed to build video walls. Such a wall is an array of numerous closely arranged screens that can work in concert and produce a large overall image; each screen is responsible for its own fragment of the picture. Such designs are used, in particular, at concerts and other public events, where there are no longer enough separate screens. The main feature of monitors for video walls is a very thin frame — due to this, the boundaries between the segments are almost invisible, and the image is perceived as a whole.

— Information display. Narrow-purpose equipment, assuming a stationary method of installation. Such displays are mounted on the wall, built into special niches or openings. They are intended to work as digital signage, broadcast advertising materials, play various video content. Individual instances of information displays can support touch control, have a pre-installed Smart operating system and other "smart" features. As a rule, specialized proprietary software is used to control the operation of such equipment.

Modern monitors can use displays with both glossy and matte screen surfaces. A matte surface is in some cases more preferable due to the fact that on a glossy screen, when exposed to bright light, noticeable glare appears, sometimes interfering with viewing. On the other hand, glossy screens offer better picture quality, higher brightness, and richer colours.
Due to the development of technology, monitors with a special anti-glare coating have appeared on the market, which, while maintaining all the advantages of a glossy screen, creates significantly less visible glare in bright ambient light.

The size of one dot (pixel) on a monitor screen. This parameter is related to the maximum resolution of the monitor and its diagonal size — the higher the resolution, the smaller the pixel size (with the same diagonal) and vice versa, the larger the diagonal, the larger the size of one pixel (with the same resolution). The smaller the size of one pixel, the clearer the image will be displayed by the monitor, the less grainy it will be noticeable, which is especially important on large monitors. On the other hand, a small pixel size creates discomfort when working with fine details and text — this mainly applies to monitors with a small diagonal.

The time spent by each individual point on the monitor to switch from one state to another. The shorter the response time, the faster the sensor responds to the control signal, the lower the delay and the better the image quality in dynamic scenes.

Note that in this case, the grey-to-grey method is used (the turn-on time is from 10% grey to 90%). It is worth paying attention to this parameter if the monitor is specially purchased for dynamic games, watching movies and other applications associated with fast movement on the screen. And even in such cases, a reaction speed of 8 ms is quite enough; a further decrease in response time does not affect the quality of the perceived image.

The vertical refresh rate supported by the monitor.

Initially, the term "sweep frequency" was used in the characteristics of CRT monitors that work with an analogue signal. By tradition, it continues to be used for LCD matrices, however, for such screens, the refresh rate is actually the frame rate. See above for more on frame rate; here we note that in this case it is not the maximum frequency that is indicated, but the frequency range supported by the monitor — from the minimum to the maximum. This allows you to evaluate compatibility with certain video cards and operating modes: the frame rate of the video signal must match the frame rate of the monitor (or at least be a multiple of it), otherwise twitches and other unpleasant phenomena are possible.

It is worth noting that the monitor usually does not support any refresh rate from the range given in the specifications, but only certain standard values — for example, 50 Hz, 60 Hz and 75 Hz for the 50 – 75 Hz model.

The horizontal refresh rate of the image on the monitor screen.

This parameter was relevant for CRT monitors, in which the image was formed by an electron beam that "ran through" each individual line on the screen and illuminated the pixels. The horizontal refresh rate described the number of lines drawn per second. However, modern LCD matrices do not use a scan, but a full-frame image. Therefore, today this parameter is rarely given in monitors, and it describes the maximum horizontal frequency in an analogue video signal (for example, via the VGA interface), with which the screen can work normally.

This parameter determines in which sector in the vertical plane relative to the monitor screen the user's eyes must be in order to see pure, undistorted colours on the screen. For example, a viewing angle of 170° means that the width of such a sector is 170°; the middle of the field of view, usually, is a line perpendicular to the screen. The larger the vertical viewing angle, the higher or lower relative to eye level you can place the monitor without tilting it.

This setting determines in which sector of the horizontal plane relative to the monitor screen the user's eyes must be in order to see pure, undistorted colours on the screen. For example, a viewing angle of 170° means that the width of such a sector is 170°; the middle of the field of view, usually, is a line perpendicular to the screen. The larger the horizontal viewing angle, the more aside from it the observer can sit; large viewing angles are especially useful when there are several people behind the monitor at once, for example, when watching a movie.

The colour depth supported by the monitor.

This parameter characterizes the number of shades that the screen can display. And here it is worth recalling that the image in modern monitors is based on 3 basic colours — red, green, blue (RGB scheme). And the number of bits is indicated not for the entire screen, but for each base colour. For example, 6 bits (the minimum colour depth for modern monitors) means that the screen is capable of producing 2 ^ 6, that is, 64 shades of red, green and blue; the total number of shades will be 64 * 64 * 64 = 262,144 (0.26 million). An 8-bit colour depth (256 shades for each base colour) already gives a total of 16.7 million colours; and the most advanced modern monitors support 10-bit colour, allowing you to work with more than a billion shades.

Screens with support for FRC technology are worth a special mention; nowadays, you can find models marked " 6 bit + FRC " and " 8 bit + FRC ". This technology was developed to improve picture quality in situations where the incoming video signal has a greater colour depth than the screen, such as when 10-bit video is fed to an 8-bit matrix. If such a screen supports FRC, the picture on it will be noticeably better than on a regular 8-bit monitor (although somewhat worse than on a full-fledged 10-bit monitor, but “8 bit + FRC” screens are much...cheaper).

High colour depth is important primarily for professional graphics and other tasks that require high colour fidelity. On the other hand, such features significantly affect the cost of the monitor. In addition, it is worth remembering that the quality of colour reproduction depends not only on the colour depth, but also on other parameters — in particular, colour gamut (see below).