How to analyze the point-by-point correction technology to adjust the display uniformity of the whole screen

As a new type of technology, LED large screens are gradually accepted by the market due to their energy saving, environmental protection, and high brightness. Among them, it has been widely used in the advertising rental market, exhibitions, entertainment performances and other fields. outdoor transparent led screen display technology has not only been applied in municipal traffic guidance signs, but has also been developed into car light sources and lighting source direction screens. In layman’s terms, it is a more energy-saving and more environmentally friendly “service-oriented” technical product.

LED large screens are composed of several LED unit boards, and even the same batch of LED unit boards has a large dispersion, which leads to the problem of uneven display. If different batches of LED unit boards are used in combination, the uniformity of the display screen will be worse, and the phenomenon of “fancy screen and dirty screen” will be more serious, which will seriously affect the viewing effect. So far, only the “point-by-point adjustment” technology can better adjust the uniformity of the entire screen display. Moreover, the mature point-by-point adjustment technology can realize the mixed use of LED unit boards produced in different batches, and the display uniformity of the entire LED screen is good.

Take a recent point-by-point adjustment scheme as an example. In this scheme, there are 36 LED display cabinets that need to be adjusted point-by-point. A total of 4 lamps produced in different periods are used, and there are 2 different lamps between the cabinets. Lamps produced during the period. That is to say, the lamps on different unit boards in a box belong to two different production batches, and the lamps in a single LED unit board belong to the same production batch. Therefore, the difficulty of this point-by-point adjustment is very high.

Before adjustment:

There are obvious differences in brightness displayed in the cabinet, the dividing line is very clear, and the white color temperature is reddish.

The entire screen display is uneven, the boundary line between the cabinet and the unit board is obvious, the entire screen display has obvious color spots, the color temperature is reddish, and there are border lines.

After point-by-point adjustment

The discreteness is controlled within ±0.5%, reaching the precision index of the manufacturer. (This indicator is the most critical. If it cannot be met, it cannot be provided to customers. This is a rigid indicator in the LED industry. Only in this way can the visibility of the LED screen be guaranteed.)

Postscript: Metering and grading require various optical devices. However, a piece of equipment is expensive, and often the total price of some projects is not as high as that of a piece of equipment, and these high-end equipment also have high requirements for operators. So if you can only rely on high-end technical equipment to solve discrete problems, the price you pay will be very high. As one of the earliest LED control cards in China that uses point-by-point adjustment technology, Liyan Technology can use intelligent color adjustment mode to complete point-by-point adjustment. In addition, its point-by-point color correction software is easy to operate and can be easily trained for employees.