As the display area of LED small-pitch products becomes larger and larger, projects of tens of square meters are not uncommon. The physical resolution of LED displays tends to exceed 19201200, that is, each ultra-large-scale LED display consists of several It is composed of several independent display areas driven by one LED controller. For splicer applications, it only needs to provide several DVI output interfaces corresponding to the number of LED controllers, and splice and display the entire LED screen. In the application of splicers in small-pitch LED displays, several key technologies are worthy of attention.
Small pitch LED display
Signal output synchronization
The multi-channel DVI signal output of the splicer must have the problem of signal synchronization. When the unsynchronized signal is output to the LED display, the picture tearing phenomenon will appear at the splicing place, which is especially obvious when playing high-speed moving images. How to ensure the synchronization of signal output has become the key to measuring the success or failure of a splicing system.
Graphics processing algorithm
We know that the point-to-point image display effect is the best. After the image is reduced, if only ordinary graphics processing technology or general FPGA graphics processing algorithms are used, the edges of the image will appear jagged, and even pixels will be missing. The brightness will also decrease. High-end image processing chips or FPGA systems using complex graphics processing algorithms will ensure the display effect of the reduced image to the utmost extent. Therefore, a good graphics processing algorithm is a key technology for splicers applied to small-pitch LED displays.
Small pitch LED display
Non-standard resolution output
The small-pitch LED display is composed of a matrix of display units of the same specifications. The size and physical resolution of each display unit are fixed, but the spliced entire large screen is often not a standard physical resolution. For example, the resolution of the display unit is 12896, which can only spell 19201152, but not 19201080. In a very large-scale splicing system, the LED display area driven by each LED controller may not be of standard resolution. At this time, it is critical that the splicer has a non-standard resolution output, which can help us quickly find a suitable one. The splicing method can allocate resources reasonably and effectively save the number of LED controllers and transmission equipment.
