Most often in various models of LED, LCD, OLED-TV, various damages are encountered, for example, a broken pixel. They look like a dot in a certain part of the screen, in different shades. There are also 4 types of “broken pixels”:
- dead - they do not light (when connected to the network). In a light image, pixels look like spots of a black tint;
- hot - turn on, on a dark screen look like white spots;
- stuck - glow in red, blue, green, yellow. This may be due to the fact that some of the subpixels are connected or not connected.
What are pictures for checking TV
Pictures for checking the TV can be downloaded. A selection of pictures is videos for viewing on TV, allowing you to identify defects on the screen while showing the video.
How to use them correctly
TV image is not just viewing static images, but high dynamic resolution, the absence of various defects during viewing, is an important task. To have an idea of the quality of the transfer of pictures on the screen, you should familiarize yourself with the terms: reducing blur and jitter. For them, the TV is responsible for the compensation system for the loss of clarity, smoothness, by adding intermediate frames.
The interpolator helps to make the picture clean, clear, without jerking while the camera is moving. When a person cannot see the “Pendulum Arrows” on the contour, if they vibrate, this means that the technique cannot fix the problem, make contour sharpness. As a result, there is a loss of clarity of the picture during movement. Using special image clips, you can check the sharpness, image quality.
What methods can still test TV
When choosing a TV, without using test pictures to check the TV, it is recommended to pay attention to the design of the model, look at some parameters:
- damage to the plastic screen;
- the presence of scratches on the back;
- the presence of the following inputs (USB, SCART, HDMI, tulips), their integrity;
- to the control panel, the presence of all buttons. You should also look at the state of the buttons, if they are not being pressed. Experts recommend considering the screen for the absence of burnt pixels, subpixels (black, color spots). This is clearly seen on homogeneous fills.
If you buy a TV without watching the equipment, then in the future, you cannot change it. Various companies suggest the presence of a small number of dots on the screen. It is necessary to pay attention to the fact that there are no highlights, blurring of pictures on the screen. It is necessary to perform verification - 3 D. Companies use 2 types of technology:
- active - points alternately flicker with frequency. Due to the interaction with the frequency of flickering of the screen, the content produces the effect of 3 D. The glasses have a battery. This method is able to strain eyesight;
- passive - the glasses have a coating on the glasses and glasses of various colors in one of the parts.
Before you buy a TV, you should watch a small excerpt of the film in 3 D for 5 minutes, with a certain technology. Passive is reliable, but there is no guarantee that it is suitable for your TV. It is recommended to check the sound system. The sound should be clear. If you heard a wheeze, it means that the speakers are loaded. You should also listen to the sound at low volume. The sound should be no wheezing. Try to immediately connect WIFI, check the settings. Ask for new software, check the functionality of the module.
Important: When purchasing a TV, it is also recommended to pay attention to the completeness according to the instructions, the availability of a warranty card. The more attentive you are to checking these factors, the better you get the goods.
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