Blurred image on the monitor: what to do? How to improve image quality on a monitor connected via HDMI Poor image on a laptop.

Initially, the HDMI interface was developed on the basis of DVI, but, unlike the latter, it had support for audio signals and was sharpened for household appliances - mainly TVs. Later, HDMI ports were added to monitors, and this is where confusion arose: a TV signal is output in a limited color range, and TVs are calibrated so that the picture looks natural in it. Monitors are sharpened for the full dynamic range, and accordingly display the correct colors only when the picture is displayed in it.

First, let's figure out how the signal is generally output. In most cases, the RGB model is used, that is, the picture is divided into three color components - red, green and blue. The intensity of each component is specified by an 8-bit number per pixel, that is, it can vary from 0 (complete absence of this color) to 255 (respectively, the maximum of this color). In total, we get the opportunity to display 256 x 256 x 256 \u003d 16,777,216 combinations (color gradations) - this range of colors is called Full RGB, that is, the full dynamic range. However, due to the limited analog signal in household appliances I had to go for a trick and use not Full RGB, but Limited RGB (limited dynamic range) - values \u200b\u200bare used only in the range from 16 to 235, that is, black is 16,16,16, white is 235, 235, 235. And all we get 219 x 219 x 219 \u003d 10503459 colors, that is, one and a half times less.

What exactly is the problem? It lies in the fact that the video card with an HDMI connection cannot determine what is connected to it - a monitor or a TV, and therefore, in the case of video cards from Nvidia, the signal is output by default in a limited range, in the case of AMD - in full. There are no problems with video cards from AMD - the monitor works with Full RGB, the video card also gives a signal in Full RGB:

And here nvidia graphics cards By default, all devices connected via HDMI are considered TVs and give a signal in Limited RGB when the monitor expects Full RGB:

As a result, the dynamic range of the image narrows, colors become faded, black looks dark gray (because the monitor assumes that 16, 16, 16 is dark gray), white is also devoid of intensity (because 235, 235 , 235 is no longer white), with other colors it's the same. That is, the picture suffers a lot, and this is especially noticeable with IPS monitors. However, this is not difficult to fix: you need to go to the Control Panel, find the Nvidia Control Panel there, go to the "Change Resolution" column and set "Full Output Dynamic Range", and then apply the changes:

Also, if you wish, you can go to the "Adjusting color parameters for video" column and do the same there (however, if after that the films start to look unnatural, it is better to return everything as it was, since some films are cut for Limited RGB):

That's it, now the image on the monitor should become more saturated.

Of course, all this makes sense to do only if your monitor is connected via HDMI. If the connection is via DVI or DisplayPort, the video card "understands" that a monitor is connected and immediately displays the picture in Full RGB.

Running multiple applications at the same time can cause screen problems such as uneven video playback and flickering. If you notice flickering or visual deterioration, follow the steps below.

Turn off automatic resizing in programs that do not support high dpi display

If the resolution (dots per inch) is set higher than 96 and Aero is running, text and other elements on the screen may not appear clearly in programs that do not support high resolution.

To avoid this problem, follow these steps:

To make the display of text and objects on the screen clear in programs on high DPI displays:

1. Open the Display window.
2. In the left pane, select Set custom text size... When prompted, enter the administrator password or confirm the action.
3. In the dialog box Resolution setting check the box Use Windows XP Style Resolution Settings, then click OK.

For more information, see Zoom in or out on screen text.

Upgrade your graphics card to a better performance

A computer's video card contains memory for displaying graphics. The more memory the video adapter contains, the better the quality.

If your computer monitor does not provide the desired display quality, you can equip your computer with a powerful graphics card.

Every LSD (liquid crystal) monitor has only one resolution at which the display can function normally. In some cases, the problem of loss of image sharpness is solved by just correct setting required permission.

More information about the services can be found on the website http://technari.com.ua/ru/services/for-home/notebooks/cable-replacement/. Due to a broken cable, images may deteriorate, colors are distorted, and other problems.

In Windows XP, to set this parameter, you need to follow a series of sequential steps:

1. Go to the "Control Panel" and in this window click on the "Display Properties" option.

2. In the window that opens, mark the required resolution value recommended by the display manufacturer.

IN Windows Vista And Windows 7 is enough with the following simple steps:

1. Right-click in the free part of the desktop and from the appeared context menu select the option "Screen resolution".

2. As a result, a window with the name "Screen Settings" pops up. In it you need to find the line "Resolution" and with the mouse click on the arrow next to this name.

3. A list of possible screen resolutions drops out, among which you need to find a line opposite which it says "Recommended". This value will satisfy all the requirements of the installed operating system.

Sharpness adjustment

Windows Vista and Windows 7 let you quickly and efficiently adjust the sharpness of the information displayed on the screen, in the form of text or web pages. To do this, perform the following manipulations:

1. Go to the "Control Panel" and with the mouse call the "Screen" window.

2. In the window that appears on the left, select the "Clear Type" tab

3. After that, in a new window, mark the monitor to be configured (if there are several of them) and continue moving on.

4. In the windows that open, select the text you like from the point of view of reading comfort.

After the end of testing special program will set custom sharpness values. Sharpness can also be set in the monitor menu. Using the control buttons, mark the "Clarity" option and find its acceptable level.

It is advisable to start any display settings with the installation of the required drivers and the recommended resolution. You can manually adjust the brightness and RGB color balance by manipulating the buttons on the monitor panel.

Read more:

Quite often when used on stationary computers On LCD monitors, you may encounter a problem with the image on the monitor becoming blurry. Why did this happen, because until a certain point everything was normal? To answer this question, you need to understand what is the cause of this phenomenon, and only then take appropriate troubleshooting actions. Let's try to identify the most common causes.

Why does a blurry image appear?

Speaking about the reasons for this phenomenon, almost all experts identify several of the most common, among which the main ones are:

• damage to the VGA cable or loose contacts on the connectors;
• incorrect settings the monitor itself;
• inconsistency between monitor parameters and operating system settings;
• driver problems.

Note: sometimes an incorrect installation is included in the same list windows updates, which most often can be found for some reason in the seventh modification. This is due to the fact that some updates (and this is confirmed even by specialists from Microsoft) are simply incomplete, and they contain updates for all kinds of VGA drivers, which lead to unwanted effects.

In this case, as soon as you notice the appearance of a blurred image on the monitor, the last installed updates must be removed manually, using at least the item for viewing installed updates in the programs and components section, which is called from the standard "Control Panel".

A more effective tool can be called the use of specialized uninstaller programs like iObit Uninstaller. True, in both cases it will be necessary to re-search for updates in manual mode and exclude from those found those that do not need to be reinstalled (as it is already clear, updates are removed one by one with a reboot and checking the system operation). As more simple solution you can offer the Show or Hide Updates utility, developed directly by Microsoft Corporation.

The simplest method to eliminate unwanted visual effects

But, suppose that the updates are all right, or their installation is presumably disabled by the user. In most cases, it is believed that the appearance of a blurred image on the monitor can be provoked by physical damage to the cable that connects the monitor to the stationary system unit. Try simply unplugging the plugs and then reconnecting. If this does not help, "ring" the cable or replace it with a new one. If possible, use an adapter to HDMI (the image stabilizes immediately).

If everything is in order with the cable, try calling the built-in monitor menu and try to adjust the clarity of the picture by changing the device's own parameters, after reading the technical documentation.

How to get rid of blurry image on the monitor in Windows 7 or other OS?

As for system settings, you can check them quite simply. In an empty space of the "Desktop", make a RMB and select the item of the screen parameters. In the settings, first of all, pay attention to the set resolution.

Almost all monitors are set to the recommended system value. If it has been changed for some reason, install the one you need. Outdated monitors can work absolutely correctly in only one mode, but some support several possible ones. Also check the refresh rate settings. First, set it to 60 Hz. However, if the device supports the use of a higher frequency, it is better to use it (it is believed that the higher this indicator, the better the picture).

How to remove blurry image on the monitor in Windows 10?

When you call the above setting item from the "Desktop" in the tenth version of the system, you will be redirected to the corresponding section located in the parameters menu.

If the option to increase the scale with a value of 125% is enabled, as well as the options for the sizes of panels and windows are changed, set the recommended parameters.

Note: if there is not a discrete, but an integrated video card on the computer or laptop, to eliminate the blurry image on the monitor, you can adjust the necessary parameters using, for example, the built-in Intel Graphics and Media Control Panel. If there are special control programs for discrete graphics adapters, it is recommended to change the settings not only in operating system, but also directly in such applications (at the same time, by the way, you can also test the chip together with the monitor).

Driver update issues

Finally, outdated drivers of the video card itself can lead to a blurry image on the monitor. Update them windows tools completely impractical. To achieve the optimal effect, use the search for the freshest updates to the control software like Driver booster... In the case of discrete graphics adapters, it is better to use specialized applications from the chip manufacturer.

As a last resort, you can find the necessary drivers either on the manufacturer's website, or search by special hardware identifiers VEN and DEV, which can be determined in the "Device Manager" (through the properties on the details tab), as shown in the image above.

User question

Hello.

I have enough old computer (already 8-10 years old, I took it from my hands especially for giving). I recently reinstalled Windows on it and the screen started to flicker a lot. Eyes get tired quickly, especially on a white background (very noticeable).

How can this blinking be removed?

PS The disk from the previous owner with the drivers - completely "rummaged" and installed everything that was on it. Did not help...

Good day!

In general, both very expensive monitors and cheap ones can flicker (both old and new)... And many users are very mistaken, thinking that such shortcomings of monitors are somewhere in the past. In fact, your eye may not see the flicker, but it will (for example, you can indirectly notice this by how quickly the eyes get tired)! I will show examples below.

As for the author of the question, the reason for the flickering, judging by his description, is associated with the low refresh rate of the screen (especially, this is true on old PCs where CRT monitors are used (these are so "thick", see on the right in the preview picture)). As a rule, to eliminate this problem, it is necessary to install the appropriate drivers for the monitor and video card, and then configure them correctly.

In the article I will analyze these and other reasons in more detail. So...

By the way, I want to add here ... If, among other things, ripples are observed on your screen, vertical and horizontal stripes run around, distorting the image (as in the example below), then you better read this article first:. In it, I pointed out the main reasons for this "behavior" of the monitor / PC ...

By the way, there is a very good way, find out if your screen is flickering (blinking) much. Most modern smartphones equipped with a camera: so turn on the camera and just focus it on the screen (no need to take pictures, just watch)... It will perfectly show if your monitor is flickering.

As a rule, if something is wrong, you will see on your smartphone how vertical / horizontal stripes run (usually from top to bottom (from left to right)). This is the very flicker we're talking about. See example below.

Monitor 1 and Monitor 2 - Note the stripes on the second (test using your phone)

A few words about modern and CRT monitors

Modern monitors, as mentioned above, may also flicker (moreover, even if you just brought it from the store, and just from the glance - it is imperceptible)... To see if there are these stripes, use the smartphone's camera or an ordinary pencil (they need to quickly wave in front of the screen and see how his silhouette will be displayed (see example below)).

This may happen due to the peculiarities of the monitor backlight (this is not a marriage, and for this reason the monitor cannot be returned! To protect yourself from such models, you need to personally test the device in a store)... As a rule, a similar feature appears when dimming!

Those. the monitor can work fine at 80% brightness, but when you try to set it to 40%, you will see (on a smartphone) how the screen starts to flicker (and especially in my opinion, this is not good).

As a rule, better monitors (in this aspect) use eye protection technologies (Flicker Free, SoftBlue, SmartImage, etc.).

But, I personally came to the conclusion that all this does not give a 100% guarantee. And the best way out is to check the operation of the monitor upon purchase - i.e. ask the seller to turn down the brightness, open a blank white sheet and point the camera (or buy something specific, for which you have already looked at reviews and tests).

If you already have a flickering monitor, then, as an option, you can try to fix the problem like this: turn up the brightness (only here you should also exercise measure), and increase refresh rate (if possible). Usually, if you decrease the screen resolution, you can increase the refresh rate.

As for CRT monitors, at a frequency below 85 Hz screen refresh - it is highly discouraged to work ()! On newer LCD monitors, it is allowed to work at 60 Hz (since their principle of operation is different).

But I note that, nevertheless, if your monitor is capable of operating at a higher frequency, it is recommended to set it exactly. Below I will show you how to find out the current frequency, and how to change it ...

Adjusting the refresh rate of the screen

Method # 1

Press the button combination Win + R , a small window should appear "Run" ... In the "Open" line enter the command desk.cpl and press Enter.

Next, you should open the display settings: depending on the version of the Windows used, the settings screen may differ slightly. For example, in Windows 10, you need to open the "Graphics adapter properties" link.

In the subsection "Monitor" there should be a tab "Screen refresh rate". Actually, you click on it and change the frequencies to the highest that your monitor supports.

An important point!

If you do not have drivers installed on your monitor or video adapter, then almost certainly you cannot set any modes except 60 Hz (even if your monitor supports them!). In this regard, I recommend using special ones (they will automatically check all your equipment and update everything that is needed).

Method # 2

If you have a driver for a video adapter, then just right-click on any free space on the desktop, and then in the appeared context menu select their settings (in my case it is "Intel Graphics Settings").

As a rule, in the main section, you can specify the refresh rate, resolution, adjust brightness, scaling and other parameters.

About drivers

If you installed all the drivers from the disk (which came with your PC), then it is far from the fact that all of them correctly "got up" in the system. Often, when after changing the Windows OS, old drivers, even if they can be installed, they do not work correctly ...

To check if you have a video driver on your system, open device Manager (for this use the combination Win + R , then the command devmgmt.msc ).

In Device Manager, expand two tabs: Display Adapters and Other Devices.

If you have a video driver installed, then in the "Video adapters" tab you should see the name of your video card (without exclamation marks).

If there is nothing in the "Video adapters" tab, or "Standard VGA video adapter" appears (or "Video controller VGA compatible") - then there is no driver on your system. An example is shown in the screenshot below.

Actually, I have a "big" article on my blog dedicated to updating the video driver. I recommend that you read it if you have a problem with this.

ADDITION!

By the way, after installing modern Windows 10, you may encounter the fact that the driver in your system will be (ie device manager will show you everything is "OK") , but you will not find links to its control panel. In this case, you also need to reinstall the driver by downloading it from the official website (see the link to the instructions above).

About cables and cords

The problem with flashing images on the monitor screen may be due to a damaged cable. Often, by the way, when pets damage him ...

By the way, it is very desirable to fix the cable (at least with scotch tape (ideal - special clips, see photo below)) so that it does not "dangle" in a slight draft, when someone passes by, or you sit down at a computer desk ...

About malfunction of the monitor, video card

Also, I can not help but note that the distortion of the picture on the screen often signals a hardware malfunction (ie there is a problem in the hardware). It is not always easy to diagnose for sure which one ...

To begin with, I recommend connecting your computer (laptop) to another monitor; and the current monitor to another PC. Thus, you can immediately find out where to look for the cause of blinking on the screen: system unit or in the monitor (sorry for the tautology).

As an add-on!

How to connect a monitor to a laptop -

As for the video card, you can use special utilitiesthat are capable of performing a stability test. You can find out how to carry it out from the article below.

Checking the video card for performance, test for reliability and stability -

I know that many people do not pay attention to various flickering and distortions on the screen. However, purely my opinion is that you should not leave this without attention! The fact is that a poor-quality picture on the monitor not only spoils the impression and emotions (God would be with them), but also affects our vision! , tense up, start to watery, etc. Extra health problems, as if none of us need it ...