Analysis of Difficulties in LED Outdoor Small Spacing
The rise of outdoor surface stickers has brought outdoor LED displays to a high-speed development stage, but its development has not been smooth. The temptation of a huge market, coupled with the lack of industry standards, driven by profit, caused the market to be in chaos. For surface mount products, the most critical factor is the choice of packaged devices, especially for outdoor small pitches, where reliability requirements are very high.
Outdoor full-color patch packaging devices are mainly reliability, weather resistance and other issues, in the harsh outdoor conditions to ensure strong waterproof performance, excellent color rendering, UV resistance, corrosion resistance and other issues.
Since the appearance of surface-mount products, there has been a debate about reliability, but in years of experimentation and improvement, reliability has been greatly improved. But for LED displays for outdoor applications, it is especially important to deal with the extreme weather tests, reliability and weather resistance. At the same time, it is necessary to adapt to outdoor long-term, high-intensity work
In the solution of the reliability problem, most packaging manufacturers have come up with their own solutions, and have made great progress from the technical level. Although reliability is still a problem in the promotion of outdoor small pitch, in the future, LED outdoor small pitch will have a great improvement in reliability.
Signal transmission problems and security protection issues
The choice of outdoor surface mount materials is a major technical problem in the promotion of outdoor small-pitch LED displays. How to choose the appropriate surface mount material can adapt to the needs of outdoor small-pitch display, which requires continuous research. For the downstream LED display manufacturers, there are two main technical difficulties facing outdoor small spacing: signal transmission problems and security protection issues.
One is single-line transmission and self-scanning control technology. Single-line transmission--no flat cable--signal distribution technology eliminates the traditional signal connector and solves the problem of poor signal transmission caused by loose connectors. The interior of the chassis is clean and tidy, and the signal power supply layout and connection are clear at a glance, ensuring stable and reliable image display. At the same time, the self-scanning in the case of high-density display bids far away from the long-distance transmission of parallel signals, improves the signal strength, enhances the reliability of data supply, increases the function weight of the display panel in the LED display control system, and weakens the intermediate signal. Conversion link.
Second, nano-protection technology, nanotechnology, with its delicate, ultra-thin, high light transmission, can form a protective layer on the light-emitting surface, completely separate the dust and rainwater from the outside of the die to ensure that it automatically fills the gap of the LED package. The function, in the case of ensuring the viscosity of the protective material, does not affect the electronic properties, the luminescent properties, and fully protects the illuminant. The combination of nano materials and LED illuminators makes the display still beautiful in the harsh environment of long-term sunshine and rain. In addition, the display surface adopts a printed circuit board structure, and a light-emitting diode with a plastic lead-lead carrier package is arranged on the front side of the printed circuit board, a driver and other devices are mounted on the back surface of the printed circuit board, and then the assembly is completed. The printed circuit board is embedded in the module base for aging, and then the nano material is filled between the printed circuit and the light-emitting diode to form a transparent waterproof sealing layer, thereby forming a single printed circuit board structure. The LEDs show protection technology.
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