Liquid crystal panel level mainly according to the number and types of points for a +, a, B, C four grades, but international and no specific number of hard and fast rules, so manufacturers of different countries and regions, the standard is not the same.

Highlight: in the liquid crystal display on the state of a pixel without work has been bright

The so-called dark: do not see LCD in the boot state, can be seen in the professional test software under TFT-LCD;

The so-called spot: in the TFT-LCD professional test software will have obvious performance, the general use is not obvious;

The so-called bright line: liquid crystal display color is produced by the horizontal and vertical scan line scan, each wire is about 0.03 mm wide, which line they appear short circuit and open circuit phenomenon that is bright line.

A + screen is without spot, no spots of light and dark, steady display and no jitter, in TFT-LCD professional test software in accordance with the label.

A screen: it is to point to without spot, spots of light and dark within 2, showing the stability of jitter free, in TFT-LCD professional test software in accordance with the annotation;

B screen: the industry generally more than 2 more than highlights of the B screen;

C screen: with a bright line of the A screen called C screen.

LCD panel selection is good or bad, will directly affect the performance and life of the LCD splicing products, but also directly affect the customer's brand reputation.

Nowadays, as the main products of the large screen display market, the LCD splicing screen is concerned with the quality of the LCD screen. Now on the market of the LCD panel is basically from the international panel manufacturers, which Samsung, LG, sharp one-third of the market, because Samsung has been leading liquid crystal splicing push, so the market of Samsung LCD panel is in the majority. As the core device of LCD splicing products, the basic understanding of its good to help the majority of users to better identify and purchase.