With the increasing display area of LED small space products, dozens of square meters of projects are common. The physical resolution of LED display often exceeds 1920 × 1200, that is, each large-scale LED display is composed of several independent display areas driven by several LED controllers. For the application of splicer, only the number of corresponding LED controllers needs to be increased For several DVI output interface, and the whole LED screen can be spliced display. In the application of splicer in small space LED display, there are several key technologies worthy of attention.
The synchronization of the output signal and the multi-channel DVI signal output of the video processor must have the problem of signal synchronization. When the unsynchronized signal is output to the LED display screen, the picture tearing phenomenon will appear at the splicing place, especially when playing the high-speed moving image. How to ensure the synchronization of signal output is the key to measure the success of a splicing system.
Graphics processing algorithm, we know that the point-to-point image display effect is the best, after the reduction of the image, if only using ordinary graphics processing technology or general FPGA graphics processing algorithm, the edge of the image will appear sawtooth, even pixel missing, the brightness of the image will decline. The high-end image processing chip or FPGA system using complex graphics processing algorithm will maximize the display effect of the reduced image. Therefore, good graphics processing algorithm is the key technology of a splicer applied to small space LED display.
For the output of non-standard resolution, the small spacing LED display screen is composed of a matrix of display units with the same specifications. The size and physical resolution of each display unit are fixed, but the whole large screen assembled is often not a standard physical resolution. For example, the resolution of the display unit is 128 × 96, which can only spell 1920 × 1152, but can not spell 1920 × 1080.
In the super large-scale splicing system, the LED display area driven by each LED controller may not have the standard resolution. At this time, the output of the splicer with non-standard resolution is the key. It can help us quickly find the appropriate splicing method, so as to reasonably allocate resources and effectively save the number of LED controllers and transmission equipment.