The refresh rate of the monitor screen - which is better?

It's hard to imagine a modern apartment in which there would not be a single screen. In one house - a TV or home theater, in another - a computer in the third - and then, and more, and something else. Each device has technical specifications - scan frequency, resolution and much more. The refresh rate of the monitor screen - which is better? This, as well as other parameters of modern TVs, we will talk about in our article.

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The frequency of the TV screen - which is better?

The viewer has no idea that sitting in front of the screen, he deals with two very important parameters that affect the image quality:

• with the frequency of the crossover;
• frequency of updates.

Many even confuse them. But this is not the same thing at all:

• The first parameter is the speed at which frames replace each other. Usually it is 24 frames per second. This characteristic was also used when there were no plasma panels, or even analog TVs - for example, when a film projector was running.
• The refresh rate of the matrix shows how many frames can appear per second on the panel. It is measured in hertz. This parameter has another name - a scan.

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How is the signal processed?

In the vast majority of modern apartments are color TVs. That is, those that take not only the image itself, but also the so-called chrominance signal. By the way it is processed, all television systems are divided into several types:

1. PAL;
2. NTSC;
3. SECAM.

Important! The PAL system with a scan of 625 lines and a frequency of 50 Hz is used in Western Europe. In America and Japan, the NTSC standard is adopted, with a higher frequency( 60 Hz), but fewer lines( 525).In Eastern Europe and Africa, the SECAM standard is adopted - 625 lines, 50 Hz.

The choice of frequency is not accidental at all, it depends on the national standards of power supply networks. Such an indicator as the quality of lines was used in the characteristics of analog TVs, other parameters are used to describe the digital image. But the frequency is important for any technique - modern appliances must also comply with the standards of electricity grids.

As for monitors, there is another frequency for them - in modern models it is 85 Hz, and this is currently the technical limit. If there is another number, this means that the value is achieved by some alternative means.

Important! If you see the designation 50 Hz, it means that 50 frames are transmitted per second. It would be if the signal went in one go. In fact, each frame is transmitted in two stages - first all the odd lines, then - even. That is, you get an interlaced scan. She has a visible flaw - flicker. It is most noticeable for large screen sizes and bright areas.

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How is the clarity problem solved?

Manufacturers strive to make screens as harmful as possible to vision. To do this, two methods are used:

• format change:
• increase the refresh rate of the monitor screen.

The first format, in which the eye almost did not feel flicker, was Full HD.The frequency is 60 Hz, and the image is 1920 by 1080 pixels. Owners of game consoles and fans of watching movies have already become accustomed to this, but broadcasting by such a standard is possible not everywhere.

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Increase in clarity

Now you can meet TVs designed for:

• 100 Hz;
• 200 Hz;
• 400 Hz;
• 600 Hz;
• 800 Hz.

Modern digital technologies allow each frame to be shown twice, and it is thanks to this that the technology of 100 Hz has appeared. The image quality becomes higher, this is certain. However, the flicker does not completely disappear, although it decreases noticeably.

Another method is used, which TV manufacturers have adopted from computer programmers. In computer animation, unlike animation, only 2 images are taken, and the program unfolds them at the angle under which it is needed. At small angles, the motion of the image becomes smooth, but the file itself greatly increases in volume.

Important! In television, the analysis of the direction of movement of the two preceding frames is handled by the processor, which also specifies the vector of the next picture. Intermediate frames are added, and the smoothness depends on their number. If 3 frames are inserted between the main frames, a frequency of 200 Hz is obtained.

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What else affects image quality?

The frequency of updating the monitor screen is not the only thing that creates a clear picture, or - on the contrary, it spoils. There is still such a parameter as the resolution.

Important! By the way, LCD TVs often sin by reducing the resolution in motion, and this is their main drawback. This is because the liquid crystals slowly switch from absolutely black to other colors and back. Plasma TVs do not have such a defect.

To preserve picture quality during dynamic scenes, the following methods are used:

• Led-backlight;
• Insert additional frames.

With the first method, the image becomes clear, but the flickering is still noticeable. This option is used in low-cost models. A more efficient method is inserting additional frames, but its use requires a powerful processor, which is available for expensive and some medium-priced models.

Important! Models, where the insertion of additional frames is used, are not very suitable for viewing films shot on film - the image becomes unnatural.

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What are TVs?

Image quality depends in many ways on the type of TV.Now you can meet such:

• LCD( Liqud Crystal Display);
• LED( Light-emitting Diode);
• Plasma Display Panel;
• OLED( Organic Light-emitting Diode).

LCD

This liquid crystal model in the world of thin TVs appeared first. It is still popular - mainly because it costs less than others. The image is formed with the help of fluorescent light.

Important! The sharpness of such screens often leaves much to be desired, and here it is necessary to watch what frequency is indicated - if it is 100 Hz, the picture will be bearable.

LED

Actually - the advanced LCD.They use more modern illumination - not fluorescent lamps, but diodes delivered in different parts of the field. This gives better contrast.

These TV sets are also relatively inexpensive. If you are thinking of buying, pay attention to the markings. The certificate must be one of four:

• True LED;
• Direct LED;
• Full LED.
• OLED( Organic Light-emitting Diode);

Important! This means that the diodes are everywhere and provide uniform illumination, that is, high image quality. If Edge LED is written, you probably will not like the image.

Plasma Display Panel

The picture on the plasma panel is obtained due to the luminescent luminescence under the influence of ultraviolet radiation. No backlighting is needed - everything happens in plasma cells, which simply do not need a light source.

These screens have very good contrast. They are also relatively inexpensive. However, there is a significant disadvantage - burnout.

Important! Serves such a panel in the middle of the year four.

OLED( Organic Light-emitting Diode)

Perhaps, in the modern market - the best models. The highest image quality, backlight is not used. Such television sets serve for a long time, electricity consumes much less than plasma ones. Until recently, buyers were wary of such screens because they were curved. The buyers were not entirely right - this form avoided the usual distortions. However, due to low demand, manufacturers began to offer such standard OLED-TVs. .

Important! Manufacturers often offer models with a frequency of 600 and 800 Hz, but they do not give a serious improvement in quality compared to screens for 100-200 Hz, and the difference in price turns out to be huge.

The golden mean of

Asking the question, what frequency of monitor to choose, remember that there are no ideal technical solutions. A high sweep frequency does not mean that you will like the TV.Conditionally screens can be divided into several groups according to this parameter:

• 50-90 Hz;
• 100-200 Hz;
• is more than 200 Hz.

What is the difference:

• In the first case, the picture can be bright and clear, but it will certainly flicker. It's bad for the eyesight, and annoying.
• Models with a frequency of more than 200 Hz - are quite expensive, but there is no tangible improvement in quality.
• Many experts even believe that marking 400 Hz or 800 Hz is nothing more than a clever marketing move.

Important!100-200 Hz is the golden mean when the monitor gives good quality, but at the same time it has quite an acceptable price. In addition, a proven manufacturer if it says 200 Hz, then - so much and there.

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Resolution

Scanning is not the only characteristic that affects image quality. For modern screens it is very important also to have permission. It is measured in pixels.

Important! The resolution increases from model to model. Full HD, which was recently considered almost a miracle of light, gives a resolution of 1080 pixels, but there are already screens with a higher index.

This feature depends on the type of TV and its dimensions. The larger the screen, the higher the resolution. The most common types are:

1. HDReady - 1280 x 720 or 1366 x 768;
2. FullHD - 1920 x 1080;
3. UltraHD( 4K) - 3840 x 2160 or 4096 x 2160;
4. UltraHD( 8K) - 7680 x 4320

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What else to pay attention to?

Having understood what frequency of the monitor to choose, pay attention to other parameters:

• contrast;
• brightness;
• diagonal screen;
• viewing angle;
• three-dimensional image.

Contrast

The color quality depends on this screen characteristic. The refresh rate does not affect it.

Important! In certificates, this parameter is usually indicated in the form of a certain ratio( 1000: 1, 900: 1, etc.).The ratio shows how many times the dark portions of the image differ from the light ones.

There are two types of contrast:

• static;
• is dynamic.

Static means the maximum difference that is in one frame. The optimal figure is 1000: 1.Dynamic also shows the overall difference between light and dark areas on the screen in general. This setting depends on the model of the device.

Brightness

It depends on the brightness value, the picture will be juicy or faded. The best televisions are those with a given value ranging from 300 to 450 cd / sq.m. There may be models with a larger value.

Your favorite size

There is no one-size-fits-all answer to the question of what a diagonal screen should be. Everything depends on the goals, the size of the room and a number of other considerations.

Important! It is necessary to take into account the minimum distance between the monitor and the viewer. For TVs 2D it is 3 diagonal lengths, and if you prefer 3D - one and a half. If you have a monitor with an Ultra HD resolution, you can watch it closely.

Installation location

The TV can stand:

• in the living room;
• in the bedroom;
• in the nursery;
• in the kitchen.

Let's look at the suitable diagonal:

• The living room is the largest room in the apartment where all the households gather, here they invite guests. Therefore, the TV can be with a diagonal of 46 inches or more.
• For the bedroom, a "box" with a screen from 32 to 42 inches is suitable.
• The same can be put in the nursery.
• And for the kitchen the screen of 26-32 inches will fit.

Angle of View

The declared angle of any modern TV is 170-180 °.However, in reality, this parameter may not be respected - for example, in the class of LED or LCD.

Manufacturers of plasma screens always adhere to this characteristic.

Important! It is not worthwhile blindly trusting what is written in the passport - the angle is assessed visually.

Three-dimensional image of

Televisions that provide a 3D image appeared on sale relatively recently, and they are still quite expensive. Manufacturers use two technologies to obtain a three-dimensional image:

• is active;
• passive.

The set of TVs with passive 3D includes two or four pairs of glasses, for the active - no additional devices are needed. Some well-known firms( for example "Samsung" or "Panasonic") use active shutter technology, LG offers "passive" models, where the volume is achieved due to polarization.

Important! Models with an active function give higher quality, but they are more expensive. With the use of glasses, the quality of the perceived image decreases approximately twofold. But such TVs, of course, are cheaper.

Pay attention to the connectors

Communication is important. Look at how many HDML connectors there are in the model you like. There should be at least two, but the more, the better. Of course, you need a USB connector.

Modern TV - the device is universal, you can connect to it computers, consoles, tablets and much more. Many models can be connected to the Internet. But you need to establish communication between devices, and in this situation, the availability of suitable connectors will make life much easier and more enjoyable.

In this article we gave you detailed information on what is the monitor refresh rate better for the eyes, for technical specifications, and also considered what other important parameters should be considered when choosing a new TV.We hope you have understood all these nuances, and now you enjoy a colorful, bright and clear picture when watching your favorite programs and movies.