How To Check The Response Time Of The Monitor

Homogenuity

Checking the uniformity of the backlight of the monitor lamps and checking the dead pixels. Can fill the monitor screen with five different colors.

Trailing

Test of real matrix response speed. 6 test options available.

Monitor aspect ratio.

The aspect ratio of monitors of the same diagonal may be different, namely, two types.

We inherited the 4: 3 ratio from CRT TVs and monitors. However, human vision perceives the world around us in a wider format, which is closer to the 16: 9 ratio. Therefore, the picture on the monitor in this ratio looks more natural, and therefore the vast majority of films are shot with an aspect ratio of 16: 9.

Accordingly, if we watch a movie on a screen with a 4: 3 ratio, we will see an incomplete picture (the image will be cut off at the edges), or there will be two unpleasant black bars on the top and bottom.

In addition, on a widescreen monitor with an aspect ratio of 16: 9, it is much more comfortable and convenient to work with programs that contain many toolbars. For example, when working in Photoshop, the left and right toolboxes will get in the way in front of your eyes and obscure the edited image.

We test the monitor for dead pixels, color rendition and image quality

To start testing the monitor, you need to click on the HTML Window link, after which the online test page will load. It is also possible to open the text in a separate browser window with a resolution of 1920×1080, but can be adjusted individually. Plus, you can download a monitor testing application for Windows, which you need to install and then check the status of the monitor without the Internet. Here the choice is yours, but I decided to choose HTML Window.

The online monitor test page initially appears in black and white. Here you can check how shades of black and white are displayed. But this is not the end of the Online monitor test online service. If you move the mouse cursor to the top often window, a menu for selecting test modules will appear. Main page is now selected.

Check the monitor for dead pixels and lamp backlighting

To check the monitor for dead pixels and lamp illumination, select the Homogenuity item. Here you can set 5 colors, with which you can check the broken pixels and lamps of the LCD monitor, you just need to first wipe the monitor screen with special cleaning wipes, otherwise you can confuse a speck with a broken pixel.

Tip: it is better to look for dead pixels on a black or white background. On a black background, you can immediately see white dots (pixels) and, accordingly, on a white background. black dots (pixels).

LCD monitor matrix response speed test

To check the response speed of the LCD monitor matrix, select the Trailing item from the menu. At this point, 6 more sub-items are available, the first main for checking the response of the matrix under different colors, and the rest under certain ones, for example, black-and-white, red-black and others.

To start checking the response of the monitor matrix in the Controls panel, you need to click on the Star Box button, after which a black square will move from left to right. To stop it, click on the Stop Box button, and increase or decrease its movement speed, respectively, click on /. Speed. The color of the square can be changed in the Box Control panel. And the color of the track along which the Backgroung Box moves.

Find dead pixels 1: 1 pixelmapping

A similar function of finding dead pixels on a computer LCD monitor. By selecting the 1: 1 pixelmapping item, you can see the moire pattern, that is, the overlay of two mesh patterns, in this case black and white.

Monitor response time.

Response time is the total time it takes to increase the brightness of a screen element (pixel) from 10% to 90% and decrease it back to 10%.

Simply put, the shorter the response time, the faster the image changes on the screen, and vice versa, the increase in response time leads to blurring of moving objects.

Recently, a new method of measuring the response. “from gray to gray”, is being introduced. Its meaning lies in the fact that it measures the time it takes a pixel to transition from one state to another, the next in gradation. This parameter is designated GTD or G 2 G and characterizes the most plausible response time.

Here are the recommended response times for various applications:

Monitor brightness.

Brightness is usually called the maximum specific luminance of the screen. It is measured in nit or candela per square meter, i.e. 1 nit = 1 cd / m2.

The higher the brightness value, the brighter the image. Brightness of white color for CRT monitors is 8. 100 cd / sq.m, and for monitors with liquid crystal matrices used in everyday life up to 220 cd / sq.m. A higher brightness value may be needed only if the monitor is planned to be used as an information display in a public place for displaying advertisements.

what will we shoot

As we noted above, the duration of the photo frame must be longer than the duration of the frame on the display. For DSLRs and second cameras with curtain shutter, the duration of the photo is approximately equal to the sync speed.

And here the first ambush awaits us: modern cameras are very short. sync speed much faster than 1/60 second.

The old Soviet Zenit E would be ideal here, but unfortunately it is not digital.

But all is not lost. a similar picture can be taken with a camera with a fast shutter shutter, but there are specific features. But we’ll talk about this in the next article.

In addition, modern DSLRs usually have the ability to shoot. so if the mirror is with a CMOS matrix, then you can use this mode. The main thing is that the mode is not very fast. no more than 30 frames per second. Well, and the resolution for naturally you need to choose the maximum. Firstly, to get the highest quality freeze frame, and secondly, to slow down the electronic shutter as much as possible.

The same requirements apply to cameras: in this case, it should be suitable with a maximum mode of no more than 30 frames per second, CMOS matrix and electronic shutter. If the camera also uses an electronic shutter when taking photos, then you can try this mode.

And finally, digital cameras, smartphones and similar devices, which are usually considered unsuitable for serious work, can be ideal here.

The requirements are the same: CMOS matrix, and rather slow operation of the electronic shutter.

True, there is one more important requirement that will immediately weed out half of the digital cameras: the shutter speed WHEN shooting MUST BE AS SHORT AS POSSIBLE, at least 1/500. 1/1000 of a second, and preferably even less. After all, 1/1000 of a second is 1 millisecond, i.e. comparable to the response time of an LCD monitor we want to measure. Shooting at a shutter speed faster than 1/500 is like shooting an active child at a shutter speed longer than 1/30. Of course, we can see something even with a longer exposure, but we must bear in mind that in this case, the shorter the exposure, the more accurate the result will be.

Such are the conflicting requirements for shooting equipment.

But, nevertheless, photographic equipment suitable for this test can be found. For example, the camera of the smartphone Samsung Galaxy S GT-I9000 was quite good for the author of the article.

Let’s try to determine the response time of the monitor with TN matrix BenQ M2700HD.

Monitor should be WARM up and well adjusted for black and white levels prior to testing. This can be done, for example, using the LCD Vs_mon program. If the black and white levels are inaccurately adjusted, then the response time test will give a corresponding error. Rather, the test result will be correct, but for incorrectly set levels.

To get the fastest possible shutter speed, when shooting, you need to set the maximum light sensitivity (in this case, ISO 800). For the same purpose, as well as to reduce the effect of PWM backlight lamps, it is advisable to calibrate the monitor during testing at the highest possible brightness.

So, we start an endless replay of the in windowed mode, and take several screenshots.

Since the electronic shutter usually “moves” along the short side of the image, position the camera in front of the screen so that you get a Portrait shot.

Screenshots of the monitor with TN matrix BenQ M2700HD, taken by the camera of the smartphone Samsung Galaxy S GT-I9000.

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In the above pictures, it is perfectly visible that although they differ in the width of the player windows that fell into them, the nature of the lines corresponding to the frames on the LCD screen in them is exactly the same (well, except for the scale, of course). in both cases there were four horizontal stripes, each of which corresponds to the next frame on the monitor screen.

Since the monitor frame rate was 60 hertz (16.7 milliseconds), by the presence of four horizontal stripes in the frame, we can conclude that the total response time of the electronic shutter of this camera is about 65 milliseconds, which is a bit too much, but quite acceptable.

Any frame is suitable for further analysis.
But since we can already distinguish the raster of the monitor matrix in the second image, we will consider the first image.
For clarity, the picture is slightly blurred in the photo editor, and conditional marks are applied to it, Corresponding to the frame time and response time from 10% white to 90% black and from 90% black to 10% white (now it is clear why the vertical lines are made of exactly such shades ).

  • It can be seen that the frame length (16.7 milliseconds) in the image lures about 13 vertical timesx zones.
  • Thus, one timeandi zone in the picture turned out to be 1.285 milliseconds long
  • Response time from white to black Takes about 1 timeatthe th zone, i.e. about 1.3 milliseconds.
  • The response time from black to white is much longer, which is typical for TN matrices. In this case, the fall to 10% white (seen by the “disappearance” of the vertical stripe) took about 3 timese zones, i.e. 4 milliseconds.

If Overdrive is enabled in the monitor settings, the response time from black to white is significantly reduced.

So this is exactly what we need!

It remains to figure out how to extract the information we need from this.
Suppose that the camera curtain moves so slowly that during this time the frame on the monitor screen has time to change not two, but three times:

In this case, in the photo we would get:

Well, now we have reference points by which we can snap to determine the time of the corresponding events.

We know that at some point in time there was a change in the rectangles on the screen, and after another 16.7 milliseconds, the opposite change occurred.

Thus, on any horizontal line in the picture, the distance between the beginning of the change in the brightness of the rectangles from black to white and from white to black is exactly 16.7 milliseconds.

If the beginning of the change in brightness is difficult to determine, then any other characteristic point can be selected as a reference point, for example, the coincidence point of the brightness of the gradients on the upper and lower bands.

Now we know what distance in the photo corresponds to a time interval of 16.7 milliseconds.

For simplicity, let’s split our picture vertically into conditional timese zones of equal width.

In the cases considered above, it turned out that the time interval is 16.7 milliseconds. It takes 13 time periods.sx zones. A small error in the determination in this case is not terrible, since it will be fractions of a millisecond.

Therefore, one timeandi zone corresponds to about 1.25 milliseconds.

Well, then everything is simple.

Horizontal measurement of front length from white to black (BtW) and from black to white (WtB).

In this case, they coincided, and have a length of approximately 4 vertical temporalse zones, that is, about 5 milliseconds.

Method of self-determination of the response time of an LCD screen of a monitor or TV

“Whoever hinders us will help us”
movie “Prisoner of the Caucasus”

Shutters in photography and technology

Of all the variety of construction, we will focus on three that are most interesting for our further consideration.

The central shutter is located between the objective lenses or just behind the rear lens. When triggered, the entire area of ​​the photosensitive element is exposed at once. The shutter speed is regulated by the time the shutter is open. Such a shutter has a very simple design, at any shutter speed it provides a uniform exposure of the entire surface of the photosensitive element, therefore, most compact digital cameras are equipped with various options for such shutters. But since the central shutter is located inside the lens and makes it difficult to replace, this design is extremely rare in cameras with an interchangeable lens.

The curtain shutter is located directly next to the film or photosensitive element. As the shutter curtains begin to move from one edge to the other, the exposure of the frame also occurs sequentially, from edge to edge. The speed of movement of the shutter curtains is kept strictly constant at any shutter speed, and the shutter speed is regulated by the configuration of the size of the “slit”, the distance between the shutters in the process of their movement (therefore, sometimes such a shutter is called a focal plane).

Such a shutter is fully open only at a shutter speed higher than the so-called sync speed, X-Sync, which is specified in the camera’s specifications, and which is used when shooting with a flash. In this case, we will NOT shoot anything with the flash, but we still need this parameter.

Thus, even if shooting with a short flash (for example, 1/1000 of a second), the exposure of the entire frame will take much longer. from 1/30 of a second in old film SLRs and 1/200 of a second or less in modern digital.

Such a shutter is structurally much more complicated than the central one, it is somewhat more capricious in operation, there may be problems with the uniformity of illumination, but it makes it easy to replace the lens and is capable of providing very short shutter speeds. This is why curtain shutters are commonly used in SLR cameras.

Finally, the third type of shutter we will focus on is the electronic shutter. Strictly speaking, this is NOT a separate device, but simply the principle of dosing information from the photosensitive matrix. Directly in the open state, the information on the photosensitive matrix is ​​first zeroed, then the matrix is ​​exposed for the exposure time, and then the information is read. Such a shutter is structurally the simplest and, therefore, the cheapest, and therefore is often used in the simplest photos and webcams and smartphones, and since it does not have mechanical parts, and therefore, noise and wear, it is often used for taking photos and cameras, even with the presence of a second shutter in them.

The last type of shutter is the most important for our further consideration.

Now a few words about photosensitive matrices used in photo and cameras.

Theory

The image on the LCD matrix of a monitor or TV is formed from several million SEPARATE dots, pixels arranged in terms and columns, each of which, in turn, consists of a triad of color subpixels.

Each pixel, in accordance with its location, is addressed by terms and columns.

Information for switching a pixel is transmitted line by line, sequentially to all pixels of each line, and so sequentially line by line for the entire screen. Then the process is restarted, the transmission of the next frame begins. Usually, in LCD screens of monitors and televisions, the time of such a cycle, the frame rate is 60 hertz or more, that is, the frames are updated every 16.7 milliseconds or even less.

Accordingly, the pixels on the LCD matrix are switched NOT at once, but line by line. Therefore, even within one frame, at each moment of time, some of the pixels on the screen are already “old”, which appeared up to a whole few milliseconds ago and have already managed to switch and change their brightness, some are younger, in the process of switching, and some have just appeared. and just about to switch.

Therefore, if we try to fix what is happening on the surface of the ENTIRE screen from black to white with the help of high-speed shooting, then in the picture we will get NOT an even gray tone, but a kind of gradient fill. Part of the screen has already changed color, and part has not yet.

In principle, of course, it is possible to measure in Photoshop the brightness of pixels in different parts of the screen shot, by their position, and also, based on the frequency of the vertical and horizontal scanning, determine the moment of their appearance, and based on this, by mathematical calculations, try to calculate the response time, but simple is the solution can hardly be called. And such a measurement is unlikely to be accurate. Well, in clarity and says nothing.

And not every camera will allow you to take such a picture.

And the point here is not only in some special requirements for its speed, but in some features of the shutter and image fixation. For example, the above picture was taken with an old budget soap dish with a central shutter, but it is basically impossible to take a similar picture even with the most modern “SLR” with a curtain shutter.

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Let’s dwell on this in more detail.

First, a few words about shutters used in photography and technology.

photosensitive matrices

At present, CCD and CMOS sensors are mainly used for shooting. Each of THESE types of matrices has its own characteristics, advantages and disadvantages. We will focus on only one of the features of each of THESE matrices, which is important for further understanding.

In a modern CCD matrix with column buffering (interline CCD), the captured frame is instantly read into a special light-protected frame buffer located in the matrix itself, and then it is slowly pumped from there for further processing.

In a CMOS matrix, the process of reading cell information occurs line by line, pixel by pixel, drain by line, in much the same way as the process of transmitting information in the LCD matrix of a monitor or TV, in which we spoke above.

Some conclusions important for further consideration.

  • The central shutter in combination with all types of sensors gives a picture taken at a single moment in time.
  • A curtain shutter in combination with any type of sensor gives a picture, different parts of which were exposed at slightly different times, determined by the sync speed. Of course, the time difference is very small, but when shooting fast-moving objects or very fast processes, certain effects can occur due to this. They are usually negative (for example, Rolling Shutter), but sometimes they can be positive as well. But more on that below.
  • An electronic shutter in combination with a CCD sensor gives a picture taken at the same time, but an electronic shutter in combination with a CMOS sensor gives a picture, different parts of which were exposed at slightly different times, as with a curtain shutter. Accordingly, the effects of this will be similar to the curtain. Rolling shutter

Well, finally, we came to the main question of the article, and we will try to somehow fix and then somehow measure the response time of the LCD matrix without using a high-speed camera or other special expensive equipment.

THE PROBLEM, stated in the title of the ARTICLE, solutions!

True, so far only theoretically, on paper. It remains to create a test material with which we will work, and select equipment that can take a similar picture.

The first is simple enough.

Let’s make a simple for offline viewing with alternating vertically black and white stripes as in the picture above, only with a frequency of 60 frames per second. It is easy to see that every 16.7 milliseconds, the horizontal bar moves down 1 step. Since most displays have a much longer response time from black to white than from white to black, the test stripes in each horizontal line alternate not from one, but three times (one black and three white). Accordingly, we got not two, but four contours. Thus, at each moment of time, we have one black and three white stripes on the screen.

Well, for convenience, as well as in order to make it easier to catch defective images, two identical test zones were made, one under one.

In the picture, they should also turn out to be exactly the same (well, perhaps with a slight horizontal shift due to the vertical scan of the monitor).

But if the offset in the picture is very large, or the length of the stripes of the upper and lower test zones do not coincide, then something went wrong (for example, the photo fell at the wrong moment of changing the monitor frames), and such a picture will have to be rejected.

To facilitate the subsequent analysis, the is divided vertically into 50 timessx zones. Combined vertical stripes, light / dark gray (10% / 90%). This should also make further work with photography easier. When photographing, it is absolutely not necessary that all zones fit into the frame. You can remove 40, 30 and even 20 zones. In this case, it is not scary if the picture contains not an integer number of timesx zones, for example, 37.5. this will NOT affect the accuracy in any way, just the conversion factor from the relative width of the time zone to milliseconds will be different.

  • small addition
    If you have a monitor with a very slow matrix, which manages to switch from white to black in one frame, then you can try using this. Here the loop takes 6 frames. The top 6 “single-frame” stripes can be used to determine the reference points on the frame, and the bottom 2 “three-frame” ones for measuring the response time of monitors with a “slow” LCD matrix. Of course, there will be a little more marriage when shooting here (you will need to select images where the entire transition is visible on the lower stripes), but you can test monitors with a longer response time from white to black.

Well, now let’s move on to the question

preamble

The response time of an LCD screen is one of the most important characteristics of a monitor and TV. It determines how well a given monitor is suitable, for example, for computer games or viewing. If the response time is too long, then there will be visible artifacts on the screen behind moving high-contrast objects, perceived as “ghosts” or “shadows” that interfere with viewing. But unlike most other specifications, response times are difficult to measure. But this could be very useful, for example, when purchasing a new monitor or TV, as well as when setting them up.

With other technical parameters, everything is more or less clear and obvious. For example, the dimensions of the screen, if desired, can be measured with a tape measure or ruler. The screen resolution and pixel size can also be “felt”, we examine the screen from a close distance. Many parameters (for example, brightness and contrast of the screen, black depth, uniformity of illumination, display of gradients, sharpness, viewing angles, gamma, and so on) can be checked using Special test programs, ranging from the simplest utilities such as Nokia Test, and to programs for complex configuration, verification and comparison, for example “LCD Vs_mon”.

But, unfortunately, the response time of the LCD screen is so easy to see and “touch”, and it remains to be guided by the values ​​indicated by the manufacturer in the passport or advertising brochure. But here, too, everything is rather confusing. There are different concepts of response time: GtG (gray to gray, from gray to gray), BtW (black to white, here black to white), BtB or BWB (black-white-black, from black to white and vice versa). In addition, each manufacturer measures the monitor response time according to its own method, some of them use Overdrive overclocking technology to reduce response time, and therefore direct comparison of monitors or TVs of different brands with each other may be incorrect.

Is there any way to do this?

In principle, of course you can, but.

The hardware part of the complex for measuring the response time consists of a photosensor that measures the relative brightness on a portion of the screen of the monitor under test, and a USB-ADC L-Card E-140 (max. 100 kHz, operates at a frequency of 10 kHz, 14 bits) for digitizing and data entry from the sensor to the computer, as well as the necessary cables.

The software part of the complex is the GelTreat program, which allows you to register and analyze time-response relationships, modified to obtain response times.

During measurements, the GelTreat program starts two processes: the first registers the signal from the sensor, the second displays templates on the screen of the monitor under test in DirectDraw mode. Pages in templates change after 500 ms for 10 seconds.

We get about 10 pulses on the recording. We process the last 5, where the monitor mode is definitely established. As a result, horizontal red lines appear on the graph, marking 10% and 90% of the maximum response (brightness). In total, we determine 5 intervals, then calculate the average turn-on times, shutdowns and their amount.

Can this method be recommended for self-testing?

Probably unlikely.

Maybe you can do it in something simpler, for example, using a regular camera or camera? In principle, it is possible, but there are certain difficulties, problems associated both with the principle of image formation on the LCD matrix of a TV or monitor, and with the principles of capturing an image by a camera or camera.

We’ll need some theory here.

The author proposes just such a very accessible and rather visual method

Since the frame change is a very fast process, it would seem that it would be best to use a camera with a central shutter to lock it. But as we found out, even an ideal camera capable of taking snapshots will not help us, we need a series of images captured at a rate of at least 1000 frames per second. But we will try to go the other way, and do with “improvised means”.

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Imagine that a picture of white and black rectangles is displayed on the screen, which at some point in time change places:

As a result, we will see:

On the LCD screen, this does not happen instantly, but within a certain time interval. With a refresh rate of 60 frames per second, this is 16.7 milliseconds.

Now let’s imagine that we decided to photograph this process with a camera with a curtain or electronic shutter with the curtain moving from left to right, and in our camera the curtain moves very slowly, several times slower than the frame refresh rate on the LCD screen.

Consider a chain of events on the screen with the simultaneous imposition of the position of the “slit” in the camera shutters:

12)

3) 4)

Next, the frame update begins:

5) 6)

7) 8)

Frame update finished:

9) 10

Now let’s remember that in the photo we only recorded what happened on the screen By the time the “gap” passes.

Of course, this is a very simplified picture. In fact, the screen does NOT switch instantly, but during the response time (which we just want to determine), and the frame scan and the movement of the camera curtains are continuous, not steps, and therefore the photo will not be so glamorous.

Thus, the photograph we have captured the events that take place on the screen at different times during one frame, relatively speaking, a lot of narrow vertical “photographs”, taken one after another.

Homogenuity

Checking the uniformity of the backlight of the monitor lamps and checking the dead pixels. Can fill the monitor screen with five different colors.

Online monitor test. Color range

Evaluation of color quality when displaying smooth gradients of different tones. 9 different modes available.

Trailing

Test of real matrix response speed. 6 test options available.

1: 1 pixelmapping

A streak test, called moire.

Checking readability and blurring of text on the monitor. You can choose both the color of the text itself and the background on which it is located.

Among other things, Online Monitor Test will be useful for you if you are working on several monitors at once. Using the “Input Lag Html (Exe)” test, you can determine if there is a delay between them in the output of the supplied signal.

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How To Check The Response Time Of The Monitor

Hello! I was interested in “Trailing”. I have a regular laptop “SONY waio vpcf11r”, a TFT monitor with a resolution of 1920 x 1080 pixels, with a maximum frequency of 60HZ. Therefore, we consider (1 minute equals 1000 milliseconds) 1000 divided by 60 hertz = 16 whole milliseconds to display one frame per second. It turns out that the response time of the matrix (in my laptop) cannot be less than 16 milliseconds. By running the Trailing test in this online service and choosing the second speed, a small trail is already formed with the moving square. Therefore, it is not clear in the first place: Why are there so many speeds in this online service (I pushed the plus and got to 150 and this was not the limit), because even at the second speed there is already a small train? And it is not clear what the response time is equal to or another speed, that is, for example, having chosen the first speed, the square moves slowly, evenly and without a loop and, accordingly, the question: what is this response time? The second speed corresponds to what response time? Yes. as my monitor has a response time of 16 milliseconds, then why is there a loop at the second speed??!

Sergei, unfortunately there is nothing worthwhile to your question. I cannot answer. I looked at the service help. there are no detailed descriptions about Trailing.

Thank you for responding! And, in principle, I am not very worried about the response time of the monitor matrix, because knowing the screen refresh rate (for example 60Hz), I understand that when viewing at 60fps, they (screen refresh rate and frame per second) will match. thanks to which it will be played smoothly. Good luck to you!

Yes, Sergei, you shouldn’t “drive” on this score. At first I also tested different indicators, etc. And then I just realized: if I’m comfortable working at the monitor myself, then I don’t care about the results of different tests, which are mostly purely synthetic)

I don’t understand anything. how to really determine the response time of the matrix. Well, the square is running, and then what? tell me a?

By the running square on the screen, you can visually determine the presence of loops due to the low response time of the matrix. Of course, you cannot determine the exact number. over, many manufacturers deliberately underestimate this parameter in the characteristics of monitors, for example, instead of real 8ms they write 4ms, because it is impossible to check it. Only if with special devices, which of course are not available to ordinary users.

Clear. What about TFT Monitor software? According to its measurements, the result is shown in 17 ms.
Can trust? I can’t choose a monitor, all the time I have a laptop, but then I decided to make myself a hospital and suddenly such a brain work)). With a laptop monitor, everything is simple as it is. it is. And here is the response time, type of matrix, connectors, etc. If I lived with this response time all the time, then 18 ms won’t surprise me too much? I choose between These monitors BENQ GW2270 21.5 “and BENQ GW2270 21.5”. Their characteristics indicate the response time: from white to black. 18 ms, from gray to gray. 5 ms. VA matrix. Be kind Sergey, give an answer.

Denis, by and large, the response time of the matrix should not be of much concern to you if you are not playing computer games. Mostly because of this, everyone tends to buy monitors with a response time of 8 ms and below.
In your case, I would pay more attention to the type of matrix (IPS, PVA, TN, etc.) For the picture quality directly depends on it. It all depends on what you will do on the computer. If, for example, do graphics (photo processing), then I would recommend IPS.

Thanks. Comments, I don’t do graphics, just my home computer. I will choose PVA. Thanks again for the advice.

And I always use a similar program. it’s called Nokia Monitor Test. The program is very ancient, but very cool!

So, the article is not about a program, but an online service. And the program from Nokia is really cool, but already outdated and it was created when there were no TFT monitors 🙂

I have an old LCD monitor. I decided to check it through this service. Everything is fine, but the backlight suffers, probably the lamps need to be changed, everything is too uneven.

Even brand new modern monitors have a problem with screen backlighting. In general, yes, over time, the lamps begin to shine dimmer and unevenly.

Is it possible to test a monitor with any resolution? And then I have a Retina Display. Will NOT break? )

Artem, and will not break)) Use without fear.

Thanks! Monitor passed the test! Order, otherwise I had doubts about the quality of the matrix.

Where to drop viruses? Into the monitor? ))))))

Fast and affordable! Checked the order)

And the broken pixels may not be initially and then appear?

But I did NOT check anything when buying. now I regret it. After a couple of days of use, I found three broken pixels on the monitor in the corner, apparently they were still at the time of purchase (((((((((((((((.

Alexander, when buying a monitor, it is imperative to check for flare and broken pixels. this is AXIOM!

And adjusting the monitor in this way can replace the calibration procedure or not?

Calibration with the instrument is the best setting, nothing can replace it.

Very good online test. set up the monitor without problems.

I use a spectrophotometer to build a profile, taking into account external lighting. Almost everything happens in automatic mode.

I’m not sure. that at home you turned on your Monique to your computer. you will have normal colors.
This is a delicate job and you need to set up a monitor complete with a computer. all factors are important and the lighting of the desktop too. For THESE purposes there is or a calibration service. or calibrator.

While I’m NOT going to buy a monitor, but I will take note.

You always have very useful information. thanks.

As always, necessary and useful! Sergei, but you do not have the opportunity to post on the “K. and after 50” group, maybe not everyone in OUR group who signed up read this useful article! Success, Alexander.

I join Alexander, on behalf of those over 70.

Julia, it is better to buy in those where they are testing, even if there is a little more expensive, but NOT a cat in a poke.

“Sergei” you are just WRONG, they put the Matrox card and give you any bullshit.

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