When people look at the quality of the TV screen, the most intuitive thing is to see whether the screen is broken, bright spots, dark spots, whether there are bright spots, dark spots, bright lines, dark lines, and whether there is serious light leakage. Among them, the light leakage liquid crystal cannot be avoided, but the light leakage is serious. , medium, slight. And they all like large screens, such as the 50-inch LCD screen is the favorite.
These are the basic points of looking at the screen.
Problems such as bright spots and dark spots:
Usually the A+ TV screen does not have any point, if there is a point, you can ask for a replacement,
Screen A: It means no spots, less than 3 bright spots and dark spots, stable display without jitter, and meets the above requirements under the TFT-LCD professional test software.
B-screen: The industry generally refers to those with more than 3 bright spots as B-screen
C screen: A screen with bright lines is called C screen, which is the worst and cheapest.
Here is the explanation:
Highlights: When the TV screen is turned on, there is a pixel that does not work and keeps shining;
Dark spots: You can't see it when the LCD TV screen is turned on, but you can see it under the TFT-LCD professional test software;
Spotted: There are spots on the image, which will be obvious under the TFT-LCD professional test software, but not very obvious in general use;
Bright line: The color of the LCD TV screen is generated by horizontal and vertical scanning lines, each line is about 0.03 mm wide, whichever line of them has a short circuit and an open circuit is a bright line.
LCD TV screens will have bright lines and bright spots in the production process. This phenomenon is unavoidable, but other performances are in line with industry standards.
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