LED display will inevitably produce tails when it is sold. Because these tails are products of different batches, the brightness is inevitably different, and the display effect is not good after assembly. At this time, point-by-point correction technology must be used.

Elimination of differences. Point-by-point correction is a technology used to improve the brightness uniformity and color fidelity of LED electronic screens. Through data collection of each pixel on the LED display, a correction coefficient matrix is given, and then fed back to the display. The control system realizes the differential drive of pixels and reduces the difference in brightness and color.

Point-by-point correction is a technology used to improve the brightness uniformity and color fidelity of LED electronic screens. Through data collection of each pixel on the LED display, a correction coefficient matrix is given, and then fed back to the display control system , To realize the differential drive of pixels, reduce the difference in brightness and color. This technology can make different batches of tail files spliced together, and can also display pure and delicate images with true and natural colors.

　　 1. According to the application, the point-by-point correction system is divided into two types:

　　 1. A single LED box is calibrated point by point, and the calibration is carried out on the production line to ensure that each box that leaves the factory reaches a high degree of uniformity;

　　2, point-by-point correction of the large screen on site, select a suitable viewing location on the LED full-color large screen display site to perform on-site calibration to ensure that the display screen achieves a high degree of uniformity in the field observation location;

　　 2. Point-by-point correction is divided into chromaticity correction and brightness correction.

　　 1. Brightness correction is the correction of LED luminous intensity. At present, due to the lack of good color resolving power of some calibration instruments, the difference in this spectrum cannot be accurately measured, so it can only measure the luminous intensity but not accurately measure the chromaticity deviation.

　　2. Chromaticity correction refers to the correction method of light metering instruments with strong color resolving ability, which can more accurately measure the brightness and chromaticity value of LED.

　　 Therefore, it is necessary to calibrate brightness and chromaticity if different batches of tail-gear LED screens with the same main wavelength are used. It can not only ensure that the brightness of the entire LED electronic display screen is consistent, but also can display the color display effect of the screen normally. The price of tail gear products is generally higher than that of large-scale products in the market. Through point-by-point correction technology, these different batches of tail gears can perform normal functions, which improves the use value of LED display products and saves customers. Large cost expenses.