Full color LED display is composed of the most basic LED unit board, not only full-color display, but also other conventional display. If there is a problem with the unit board, it will directly affect the display effect of the whole full-color LED display screen, and even directly lead to the black screen
Full color LED display is composed of the most basic LED unit board, not only full-color display, but also other conventional display. If there is a problem with the unit board, it will directly affect the display effect of the whole full-color LED display, and even directly lead to the black screen phenomenon, so it is very important to distinguish the unit board of the full-color LED display effectively. How to distinguish the quality of LED display unit board has become a concern of many manufacturers, the majority of friends can consider from the following aspects.
1. IC device: the brand of IC device is very important. In the later stage, we will consider what model we use and how many ICs we use, and use more or less, which will greatly affect the quality of LED unit board. Even a few LED display manufacturers, in order to save costs, will deliberately reduce the number of IC devices in the production of cell boards, or use irregular sub IC devices, which are very infeasible.
2. Led beads and chips: for the good or bad of LED beads, our naked eye is unable to judge, only by a long time of multiple tests can we judge. For irregular LED display manufacturers, the products will be powered on before leaving the factory to check whether the display can work normally, but it will not go through long-term aging test, because long-term aging test will affect the manpower and material resources of the manufacturers. Under normal circumstances, before the product is shipped, the LED display will be on for at least 4 days (24 hours uninterrupted) to ensure that each product can be delivered to the customer intact.
3. Welding quality: Welding refers to the inspection of whether there are components missing or wrong sticking, whether there are components pin burr short circuit and other phenomena, whether the straight plug-in solder joint is smooth and round, whether the board surface is clean and tidy, and whether there is no false or missing welding. Also check the uniformity of light-emitting dot matrix and ink color.
4. LED unit board materials: in recent years, many LED unit board manufacturers use cheap flame retardant paper board materials or single-sided fiberboard as PCB for LED lamps in order to compete for more customers at low prices. If you don’t know what to do, you may not feel any different, because it won’t make any difference at the beginning. But after a few months, it is easy to be affected by moisture, UV damage, oxidation, oxidation fracture and other problems, so it is easy to lead to the waste of the whole LED unit board. The regular display unit board uses double-sided all glass fiber PCB board. Although the cost will be relatively higher, it has more security for users in the future.
These are the four important points to distinguish the quality of LED unit board. The quality of LED display unit board has a direct impact on the display effect of the display screen, so we must carefully distinguish it when choosing the LED display screen.
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