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Check for broken pixels on LCD TV

The second most important device is an LCD TV after a laptop or computer. And just as the technology hasn’t improved, the problem of dead pixels is still relevant.

How to test your TV for broken pixels.

What is A Pixel?

Making liquid crystal displays is a complex and time-consuming business. We recommend learning about assembly from the Discovery TV channel’s thematic show “How it done”. Perhaps we will have such an article quickly. LCD screens are firmly entering people’s lives on the street and are gradually replacing devices with cathode ray tubes because of their many advantages, including:

  • They require less space, making the TV thinner.
  • They deliver better electricity. In other words, it provides the best video signal.
  • Low radiation levels have little impact on the environment and viewers.

The principle of the LCD panel. The radio waves converted into an electric flow of light pass through the entire system, such as common polarizers, thin-film transistors, color filter panels, etc., reaching the liquid crystal layer or plasma layer with a general backlight module. The value of the input signal determines the final color of the viewer’s gaze on the display’s outer matrix. The entire outer surface of the matrix is ​​divided into small dots called pixels. It is the debris of various shapes that visualize the change in direction and the constant motion of the liquid crystal caused by the action of the electric field. Pixels are invisible to the human eye. However, certain situations can interfere with viewers’ friends watching TV. Therefore, a red dot suddenly appears while broadcasting a night scene. Or blue on a light background. Such fragments are called beaten.

Causes of Bad Pixels

The number of pixels is millions. Therefore, we cannot guarantee the performance of each pixel. For various reasons, some crystals freeze and appear to be replaced by other subpixels of the primary color, not changing their orientation. The main reason for this phenomenon is the failure of the control transistor, which is why the pixel transmits a single color. The chance of treatment depends on the color of the sub-pixel. Using several shades of red, blue, or yellow, it is easy to reload the patient. Treatment using software and physical methods. By the way, have you ever done a massage or a monitor or TV? And sometimes they need it. But about it later.

Much worse is the complete failure of the control transistor (the so-called inverter). In this case, the entire pixel or matrix begins to flicker and becomes completely dark or bright. Regardless of the total, these pixels can be safely ordered from the Requiem service. Replacing an item is almost impossible without factory conditions. However, there is no evidence of this practice. Broken pixels are big sneaks. They appear suddenly or can leave in English or drag a neighbor behind you. But the main thing-even a new TV may already have defective pixels. This is accepted by the international standard ISO 13406-2, which formed the basis of the national standard GOST R 52324-2005. According to this document, TV displays are divided into 4 classes. Based on broken pixels per million pieces:

  • Class 1-Dead pixels are not allowed. We found one of them-the replacement of the panels at the manufacturer’s expense is required. It is represented by a small number of screen series exclusive to the market.
  • Class 2-Only two black or white pixels on opposite background, or more than 5 color pixels. The most popular market in Russia and Commonwealth countries.
  • For the third class, 5 white dots on a black background, 15 black dots on white, or 50 colored dots are allowed.
  • The fourth grade has a standard ten times higher than that of the third grade.

Assigning a display to one of the types does not guarantee a high cost. In one manufacturer, a class 1 LCD panel can have 3 to 4 classes and vice versa. Similar comments apply to other properties such as impact resistance, density, etc.

Check The TV for Image Defects.

You can check your TV display in much the same way as a laptop or personal computer monitor. In fact, it didn’t end without “but.” To control the software method, you need a system device or laptop with a network connection and a second monitor setting. But let the store be taboo. Instead, you will be given a service that checks the matrix for money. But if there is a tricky way, why overpay. It is enough to check the TV by downloading the image of the gradient background and video. Then write to removable media (USB flash drive, memory card). You can ask your sales assistant to check the connection of your flash drive or memory card. Then connect and check the prepared media. White is cut to black, black to white, red to blue or green, etc.

Pixel Processing

Treatment methods can be divided into laboratory, software, and body. The first category is not suitable for consideration. Only professionals can do it. And the other two deserve more attention.

Software solution

Many manufacturers offer proprietary software solutions to identify and remove square pixels. Use it better if possible. Android TV offers a number of alternatives due to its compatibility with the Play Market online store. Other models can be connected to a computer or laptop. Ideal if your TV is your primary monitor. Then it is convenient to run normal applications of the PC operating system with the help. Among the utilities for smart TVs, I mention Bad Crystal and JscreenFix. They are paid, but the price is low. Compared to other programs that restore broken pixels in 48 hours, it can be removed in minutes. The software system eliminates 80-90% of all defects and reduces the rate of consumption of the device matrix. However, in more severe cases, it is better to leave the software active overnight.

Mechanical shock

It consists in massaging the area around the broken pixel. It is advisable to moderately press the screen with a soft fleece or ear stick. It is very important not to overdo it. Otherwise, at least 8 adjacent pixels will be damaged if you have treated one pixel. All actions are organized at your own risk. Therefore, it is not recommended to perform the procedure on the warranty screen as there is a concern that self-treatment may lose your right to service depending on the service program.

End

With this, we review the reasons for the algorithm that checks for and removes dead pixels from the TV screen. Nastroyvse wishes its readers high-quality images with surround sound. Make sure that broken pixels don’t interfere with viewing your favorite content anywhere!

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