Can not buy, analyze the quality judgment of LCD panel

[China Glass Net] The LCD panel is easy to understand. It is the screen of the splicing screen. The quality of the panel directly determines the display effect and price of the splicing large screen. How to judge the quality of the LCD panel and classify it? Now let's talk about the specific method of judging the quality of the LCD panel.

When classifying LCD panels, you must first understand the concepts of bright, dark, speckle, and bright lines:

1) Highlights: A bright spot is a pixel that does not work but is always lit when the large screen is turned on.

2) Dark spot: The dark spot is invisible to the naked eye when the screen is turned on, but it can be seen under the professional test software TFT-LCD.

3) Spot: The spot is not obvious when the screen is used, but it will be very obvious under the TFT-LCD test.

4) Bright line: The bright line is the case where there is an open circuit or a short circuit in one of the horizontal scanning lines and the vertical scanning lines.

According to the characteristics of the liquid crystal panel, such as bright spots, dark spots, spots and two lines, the current level of the liquid crystal panel is divided into four levels of A+, A, B, and C.

1) The A+ screen is a good grade, which means that there are no spots, bright spots, dark spots and two lines under the TFT-LCD test, and the screen display effect is stable without jitter.

2) A screen: A screen is slightly worse than A+ screen, which means that there is no shift in the TFT-LCD test, but there are bright spots and dark spots, the number is less than 2, and the image shows no jitter.

3) B-screen: The B-screen is defined in the industry as the number of bright spots on the screen is more than 2 screens.

4) C screen: The C screen is poor in the four screens. Generally, the A screen with two lines is a C screen.

Whether the quality of the LCD panel is good or not will have a direct impact on the performance and service life of the LCD splicing screen, and it will have a greater impact on the image of the product brand in the user's mind. In order to seize the market, shoddy, the phenomenon of posing as A screen in C screen is not uncommon in the market, which not only seriously damages the vital interests of users, but also has a certain impact on the development of the entire industry. Through the introduction of several kinds of liquid crystal panels above, it is hoped that the discriminating ability of the panel can be improved, and it is prevented from being deceived when purchasing the LCD splicing large screen.

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