3 key technologies of small pitch LED screen splicer

As the display area of ​​LED small-pitch products is getting larger and larger, dozens of square meters of projects are common. The physical resolution of LED displays often exceeds 1920 × 1200, that is, each ultra-large-scale LED display consists of several It is composed of several independent display areas driven by each LED controller. For the application of the splicer, it only needs to provide several DVI output interfaces corresponding to the number of LED controllers, and the entire LED screen can be spliced ​​and displayed. In the application of splicer in small-pitch LED display, there are several key technologies worthy of attention.

Signal output synchronization

The multi-channel DVI signal output of the splicer necessarily has the problem of signal synchronization. Unsynchronized signals are output to the LED display, and screen tearing will occur at the splicing point, especially when playing high-speed moving images. How to ensure the signal output synchronization becomes the key to measure the success or failure of a splicing system.

Graphics processing algorithm

We know that the point-to-point image display effect is good. If the image after reduction processing is only using ordinary graphics processing technology or general FPGA graphics processing algorithm, the edges of the image will appear jagged, and even pixel loss will occur. The brightness will also decrease. High-end image processing chips or FPGA systems using complex graphics processing algorithms will ensure the reduced image display effect. Therefore, a good graphics processing algorithm is a key technology for a splicer applied to small-pitch LED displays.

Non-standard resolution output

The small-pitch LED display screen is formed by splicing a matrix of display units of the same specifications. The size and physical resolution of each display unit are fixed, but the entire large screen stitched together is often not a standard physical resolution. For example, the resolution of the display unit is 128 × 96, which can only be spelled 1920 × 1152, but cannot be spelled 1920 × 1080. In a very large-scale splicing system, the LED display area driven by each LED controller may not be of a standard resolution. At this time, it is critical that the splicer has an output with a non-standard resolution. It can help us quickly find a suitable The splicing method can reasonably allocate resources and effectively save the amount of LED controller and transmission equipment used.