The image on the monitor consists of points, referred to pixels.

Defective pixels Present a black or bright on a black background point on the LCD monitor, which seemed to be the drawback.

Bought pixels are also called defective pixels (from English. defective Pixels.) either dead.

The dark points on the recovery monitor in the home criteria are not subject to, and light, so referred to as "stuck" broken pixels in a number of all sorts of cases can be returned. How to do this, it is possible to find out below:

It is curious:

A certain number of broken pixels is permissible when selling a LCD monitor and its disadvantage is not. There is an ISO 13406-2 standard that sets the requirements for the quality of LCD monitors and by the number of broken pixels.

Additionally, about this and the broken pixels have the opportunity to read the article:

www.thg.ru - Natural decline: bad pixel failure on LCD panels.

Look also:

What is defective pixels?

The image on the monitor consists of points called pixels. Bought pixels are black or light on a black background point on the LCD monitor, which seemed to be the drawback. Bought pixels are also referred to as defective pixels (from English. Defective Pixels) or dead. The dark points on the recovery monitor in the home criteria are not subject to, and light, so referred to as "stuck" ...

Although the liquid crystal panels have long ceased to be a dream, even when using the most modern technologies, defects are found that can spoil the mood from a perfect purchase. In order for the purchased goods to fully satisfy, you need to check the TV on broken pixels.

Today, liquid crystal displays are not unusual and extraordinary. On the contrary, in addition to televisions, they are present in many devices: computer monitors, phones, cameras, navigators and other similar techniques. The basis of the LCD or LCD technology is liquid crystals. After passing through the layer of light crystals from lamps or LEDs, an appropriate picture appears on the screen.

The color TV matrix is \u200b\u200ba huge number of the smallest indivisible rectangular or round cells called pixels. In turn, each such object consists of red, green and blue subpixels. It is these colors, more precisely, their combinations are considered the basis of color television. The simultaneous glow of all pixels generates a holistic image on the screen. And the more pixels, the clearer it turns out the picture. If you look at the display closer, you can easily consider three colored areas of these objects.

The concept of broken pixels, the reasons for their appearance

The number of pixels on the display is so huge that it is almost impossible to guarantee their one hundred percent state. Often, on the screen, you can observe glowing in one color, completely fixed points, which even change the image of the TV do not change the color and place of their location. It is these objects that are called bid pixels. They can be black, white and colored. The causes of these defects are two: the imperfection of technology and the usual production marriage.

Bought pixels occur in two layers: liquid crystals and thin film transistors.

After the failure of the transistor controlling liquid crystals, black ("dead") points appear, denoting non-functioning cells. Subsequent management of these crystals is simply impossible. Such defects are most visible on a light background. Some specialists consider it impossible to "treatment", others argue that with the help of a laser actually partially return the pixel of the working condition.

The second reason is the subpixel frozen in the same position. This problem appears in layer of liquid crystals. Such a "stuck" object is manifested on the display as a white (burning) or color point. To eliminate this defect, you can take advantage of special programs or hold a number of physical manipulations. There are cases when broken pixels, after some time, disappear by themselves.

Thus, choosing a LCD TV, to pay little attention to its appearance, the presence of numerous functions, ports, connectors. An important place also occupies a device for the presence of matrix defects. Let's try to figure out how to check the TV before purchase, and protect yourself from acquiring low-quality equipment.

Permissible number of broken pixels

Often in stores you can watch the picture when the buyer tries to return the newly acquired TV, finding the defects on the screen, in particular, broken pixels. For the sake of the sake, we note that usually the dispute between the store and the buyer, it ends not in favor of the latter. In order not to get into the unpleasant situation, we recommend approaching the selection of the TV very responsibly. In particular, it is worth knowing how in a traffic point to check the LCD TV when buying on broken pixels, to get acquainted with certain standards, according to which the displays are divided into four classes.

How to check TV in the trading network

The information in the table indicates that the first-class products are completely devoid of broken pixels. The cost of goods depends on its classity.

The picture is formed on the screen by all the display pixels. For example, the permission of Full HD (1920 x 1080) involves the use of more than two million points. Knowing permissible norms of broken pixels, ways to check for such defects, it is easy to choose high-quality equipment.

Testing devices can also be conducted using special programs by connecting the TV to a computer or laptop. Often the buyer has no computer at hand, so such manipulations are extremely difficult in the store. Now many shops offer a paid screensheet service for defects. How to be in this case, is it worth agreeing or still try to cope with this work on your own forces?

The easiest way is the visual inspection of the screen from a close distance to the presence of a point glowing in different color. The usual magnifying glass will become a reliable assistant in this check. Detection of black dots, possibly when applying for a white field screen. To find white points, it is enough to make the screen dark. Search for defective color subpixels can be easier, alternately changing the color of the screen.

It is important to remember that some defects do not appear immediately, but only after the matrix heating. Pictures in the form of colored stripes, mesh, fill in the form of chess will also help you quickly find incorrectly working and stand out on a general background of subpixels.

If you are planning to purchase a new technique, first of all examine the relevant information, in particular, how to check the TV when buying in the store. For testing you need to choose special images and videos. They contain special pictures of various colors that alternately appear on the screen. Then write this information to the USB flash drive, then go for the TV. Videos are usually accompanied by music, which will make it possible to simultaneously check the quality of acoustics.

Many today prefer the new generation devices with the Ultra HD resolution (3840 x 2160). They are characterized by an excellent saturation of colors, an ideal transition from one shade to another, the ability to adapt any format to 4k, excellent sound, a variety of additional functions. To check TV 4K when buying, you must use pictures with the appropriate resolution.

Is it possible to "cure" broken pixels

Often, defects on the display occur already during operation. Black points, as it was previously noted, deleted independently. As for color pixels, you can get rid of them in two ways: physical treatment and hardware massage.

The first method involves the use of a conventional cotton wand for massaging the damaged area in which the "stuck" pixel is located. Such manipulations are carried out with circular motions when the device is turned off. This method cannot be called completely safe, because the inaccurate movement will not only not get rid of, on the contrary, can add trouble.

The second method is to apply special programs that are easy to find on the Internet. Badcrystal - not always copes with the task, however, try. Practice shows that it removes the hanging points within a few minutes or a couple of days. JSCreenFix program is no less popular. It not only finds a defect, but also eliminates it. Work time from 20 minutes to 10 hours.

Thus, armed with the necessary test set, you can safely go to the store for a new TV. Hurry when checking the device is invalid. The check is to pass slowly, exploring step by step each section of the screen.

Bought pixels are found in the products of any manufacturer, no one is insured against marriage. Whether there are broken pixels on the phone, on the camera display, on the TV (monitor), and on any other technique equipped with a display. Therefore, before buying a check, defective, it is in the first place. The easiest option of checking is the output to the screen of black and white images. If there is a failure or broken pixel, on such backgrounds they immediately rush into the eyes.

In Matrix LG, Panasonic, Philips., Samsung, Sharp., Sony, Thomson., Toshiba. 0.3% of the total pixel counterfeit, it is considered technically proper, and neither the exchange nor return is subject to. Here is such a guarantee :)

For the buyer, one pixel is already loss, and I want to return / exchange the goods as soon as possible, but not everything is so simple. In general, it is necessary, somewhere 4 -5 broken pixels, and then the goods can be exchanged. In general, if there is at least one or suspicion of defective pixel, the goods are not worth buying. Fortunately, our time is great.

Do not be lazy and you need to insist in the scheme: Show the goods in action - I will pay money. The fact is that the LCD screens are perfectly permissible for the presence of a certain number of broken pixels. And this is not considered a lack of goods.

Conclusion - the problem is quite controversial - you can understand the other way. Another thing is that self-respecting store - will offer to see / check the goods.

The permissible number of broken pixels according to the ISO 13406-2 standard.

The values \u200b\u200bof broken pixels on TFT monitors are defined by the international ISO 13406-2 standard.
This standard defines the limit values \u200b\u200bof the number of broken pixels on TFT monitors in pieces per million. In accordance with it, the LCD panels are divided into 4 classes depending on the number of broken pixels of different types, as indicated in the table below.

Type 1 - constantly glowing pixels.
Type 2 - Constantly off ("dead") pixels.
Type 3 - Defective Red, Green and Blue Subpixels.

It should be noted that some manufacturers and / or monitor sellers give the best guarantee / acquisition terms. For example, they offer a replacement of the monitor if at least one "broken" pixel of any type is detected or if a group of three and more "broken" pixels are located together, or at no further of a certain number of points from each other and / or from the center of the screen.

Yet

"Defective pixels" - Defect of an electronic device that perceives or reproducing the image and having a pixel structure. It is manifested in the invariance of the output signal of the matrix of the digital camera) of several pixels. "Hot pixels" - The defect at which the value of the output signal has an incorrect dependence on the input, or the output signal to the greatest extent depends on other factors. "Dependent pixels"- Jargon term, meaning the dependence of a particular pixel from its importance. As a rule, not noticeable on realistic images. It can only be detected on the monitor only with a "chess" fill or "grid". The initial appearance of such a defect is the malfunction of the matrix element, in the case of a "broken pixel" - a constant malfunction. Since the manufacturing of the matrix process is expensive and time consuming, and it is possible to check it for a malfunction only after full manufacturers, manufacturers try to reject products as much as possible, referring to its test results to one of the quality classes. For the electronic storage devices, the term "broken cell is traditionally applied "," Faulty Cell "," Faulty Block ", because, unlike photographic and display devices, there is no explicit connection with the place of defect in the image.
Pixel graphics - The form of digital painting created on the computer using a raster graphic editor, where the image is edited at the pixel level, and the image resolution is so small that when viewing the image, pixels can be distinguished with a naked eye. On old computers, in Game Boy games, games for old game consoles and many games for mobile phones are mainly used pixel graphics, as this is the only way to make a clear small image with a small resolution of screens characteristic of these devices.

Defective pixels

In matrix devices consisting of a large number of identical cells, such as computer displays, often encounter defects that are manifested only on one cell or a small group of cells. The most common defects:

Spoiled pixel LCD-monitor Nikon Coolpix 3100 camera, an increase of about 20x

"Defective pixels" (as well as "dead" or "bad" pixels, the official name - defective pixels, eng. defective Pixels) - Defect of an electronic device, perceiving or reproducing an image and having a pixel structure. It is manifested in the invariance of the output signal (the brightness of the glow in the case of a monitor, data in a digital file in case of) several pixels.

"Hot pixels" (eng. hot Pixels) - a defect at which the output value is incorrect dependence on the input, or the output signal is most dependent on other factors (temperature, the value of neighboring pixels).

"Dependent pixels" - Jargon term, meaning the dependence of a particular pixel from its importance. As a rule, not noticeable on realistic images. Can be detected on the monitor only the "chess" fill or "grid".

The reason for the appearance of such a defect is the malfunction of the matrix element, in the case of a "broken pixel" - a constant malfunction. Since the manufacture of the matrix is \u200b\u200bthe process of expensive and time consuming, and it is possible to check it on a malfunction only after full manufacturers, manufacturers are trying to reject the products as less as possible, referring to its test results to one of the quality classes.

For electronic information storage devices (RAM, flash memory), the term "broken cell", "defective cell", "defective block", since, as opposed to photographic and display devices, there is no explicit connection with the place of defect in the image.

"Bought pixels" on photo engineering matrices

In the case of a digital camera matrix, a video camera, scanner, a document-chamber or another perceiving the image of the output signal value is the numeric value of the corresponding pixel in the digital camera file. In the overwhelming majority of digital cameras, masking "broken pixels" by interpolation their value from neighboring (thereby turning them into "dependent").

Most producers have no more than 3 (some - 5) broken pixels are not considered a marriage of the matrix.

The presence of a "line" of hot pixels, as well as groups of closely arranged hot pixels, is considered a marriage of the matrix.

"Bought pixels" on monitors

The ISO 13406-2 standard sets 4 class of quality monitors at the permissible number of broken pixels. Monitor sellers also set some threshold for their product, usually corresponding to one of the classes. Monitors with a large number of broken pixels are considered defective and subject to replacement. On modern monitors with the TN Film matrix, the most susceptible to this disease, the "hot" pixels are removed by the Repair procedure (off separate pixels).

Check the monitor for the presence of broken pixels can be attentive image inspection by changing its solid fill on black, white, red, green, blue (in the Nokia Test program - the Color icon). The absence of "points" of another color with such a sequence certainly indicates the absence of broken pixels.

To make sure that there are no "hot" and "dependent" pixels, it is additionally recommended to pour a chess monitor, as well as a mesh (in the Nokia Test program - the Moire icon, that is, Moir).

"Bought pixels" in the video card

In some cases, the defective cells of the video memory on a computer video card or other electronic device with a similar method of creating a video image, form the "broken pixel" effect on the monitor of any type. Since only one bit is defective, a characteristic feature of such a defect is its dependence on the applied video resolution, the color depth of this video mode and the pixel color.

Links

Wikimedia Foundation. 2010.

• Folkerk (city)
• Losev

Watch what is "broken pixels" in other dictionaries:

ISO 13406-2 - ISO 13406 2 ISO standard for visual ergonomics LCD displays. Full name "Ergonomic Requirements for Work With Visual Displays Based on Flat Panels Part 2: Ergonomic Requirements for Flat Panel Display". Known to consumers ... ... Wikipedia

LCD monitor

Burning luminofora - Major article: Luminofor burning phosphor irreparable damage to the phosphor on the display screen of the ELT or plasma panel. It comes due to overheating of the area of \u200b\u200bthe luminophore coating with its subsequent evaporation, and is usually associated with ... ... Wikipedia

LCD monitor - LCD monitor (also liquid crystal display, LCD, LCD monitor, English Liquid Crystal Display, LCD, flat indicator) Flat monitor based on liquid crystals. LCD TFT (eng. TFT Thin Film Transistor Tonclosure ... ... Wikipedia

TFT-screen - LCD monitor (also liquid crystal display, LCD, LCD monitor, English Liquid Crystal Display, LCD, flat indicator) Flat monitor based on liquid crystals. LCD TFT (eng. TFT Thin Film Transistor Tonclosure ... ... Wikipedia

TFT display - LCD monitor (also liquid crystal display, LCD, LCD monitor, English Liquid Crystal Display, LCD, flat indicator) Flat monitor based on liquid crystals. LCD TFT (eng. TFT Thin Film Transistor Tonclosure ... ... Wikipedia

TFT monitor - LCD monitor (also liquid crystal display, LCD, LCD monitor, English Liquid Crystal Display, LCD, flat indicator) Flat monitor based on liquid crystals. LCD TFT (eng. TFT Thin Film Transistor Tonclosure ... ... Wikipedia

TN + FILM. - LCD monitor (also liquid crystal display, LCD, LCD monitor, English Liquid Crystal Display, LCD, flat indicator) Flat monitor based on liquid crystals. LCD TFT (eng. TFT Thin Film Transistor Tonclosure ... ... Wikipedia

LCD panel - LCD monitor (also liquid crystal display, LCD, LCD monitor, English Liquid Crystal Display, LCD, flat indicator) Flat monitor based on liquid crystals. LCD TFT (eng. TFT Thin Film Transistor Tonclosure ... ... Wikipedia

LCD - LCD monitor (also liquid crystal display, LCD, LCD monitor, English Liquid Crystal Display, LCD, flat indicator) Flat monitor based on liquid crystals. LCD TFT (eng. TFT Thin Film Transistor Tonclosure ... ... Wikipedia

Stuck or dead

Have you ever noticed a static pixel (small point) on the LCD screen? Ate yes, then you have a stuck pixel. Fortunately, stuck pixels is not always stuck. As for the dead pixels, it is hardware problems. They are often caused by production defects - pixels should not be stuck or burned over time.
The pixel is stuck differently from the dead pixels, the fact that it is more often of the same color - red, green or blue - all the time, and a dead pixel is most often black.

Usually, a dead pixel is very rarely found, more often are the consequences of the fact that you did not start to restore the stuck pixel on time. Subpixels inside the pixel with time accumulate excess energy and burnout.
Many are found with a white pixel and confuse it with bits / dead pixels, but this pixel is known as "hot pixel." All subpixels are active in it and it is always stuck.
Do you have defective pixels? Yes, it's hard to say. The easiest way to see this by installing the background with one fill on the screen. We have facilitated this procedure by adding a test in Bad Crystal.
Of course, the speech on your screen can be part of dirt, or dust - swipe your finger on it (gently!) To make sure. If it does not move, it's rather a defective pixel

So, you found a defective pixel - what now?
Try Badcrystal if you are looking for a program that does it. Bad Crystal is a unique utility for cleaning your screen from stuck pixels, stains and vertical stripes. Innovative algorithm and high technologies used in Bad Crystal allow you to restore up to 90.7% of all defects on LCD screens in a few minutes.

Yes, but this is a hardware problem - how does the software fix it?
There are programs that quickly change colors, thereby affecting subpixels. If the matrix with rapidly changing colors is located in the area of \u200b\u200bthe jammed pixel, the program constantly polls the stuck pixel, on the shame of color, thereby feeding it excess energy that contributes to its recovery.

It does not work what to do?
Most likely, you either hit 10% or pixel that you are trying to fix dead \u003d (
Try the method of massage the defect area. Again, be careful - do not press too much or do not use something sharp, you can easily damage your monitor.

Manufacturer's warranty
Unfortunately, one faulty pixel cannot be the reason to exchange the device for warranty - even if you just recently purchased a computer. Different manufacturers have different policies to combat stuck or dead pixels. Some manufacturers will replace the monitor, which has at least one faulty pixel, while most manufacturers require N-minimum number of defective pixels before offering warranty service.

Documentation

Learn all about stuck pixels. What is a stuck pixel? How are they formed? and much more...