The composition of the full-color LED display is composed of the most basic LED unit board. If the unit board has a problem, it will directly affect the display effect of the entire LED screen, such as common color difference areas or black screens! At this time, how to detect and distinguish the quality of the LED display unit board has become very important, and it has also become a problem that many LED display manufacturers are concerned about.
1. LED unit board sheet
In fact, many LED unit board manufacturers now use cheap flame-retardant paper boards or single-sided fiber boards as PCB circuit boards for LED lights in order to compete with customers at low prices. There is not much difference when it is used by unknowing people. After nearly half a year of use, it is prone to breakage problems such as moisture, ultraviolet damage, oxidation, etc., which will easily cause the entire LED unit board to be scrapped. A good LED display unit board uses a double-sided full glass fiber PCB board, although the cost will be relatively higher, but it will be more secure.
2. IC devices
Whether the brand of IC device is consistent. Or what type and how many ICs are used will greatly affect the quality of the LED unit board. In order to save costs, some LED display manufacturers will deliberately reduce the number of ICs during the production of cell boards, and also mix other brands of ICs.
3. LED lamp beads and chips
The naked eye cannot distinguish the quality of the lamp beads, and can only be distinguished by long-term testing. Generally, informal LED display manufacturers will power on their products before leaving the factory to check whether the LED display can work normally, but they will not undergo a long-term aging test. After all, a long-term aging test will affect the cost and labor cost. As a Shenzhen LED display brand manufacturer, Lihelilai has a strict production and quality inspection process. Before the product is shipped, the lighting aging test is at least 96 hours to ensure that each product can be delivered to the customer intact.
4. Welding quality
Check whether the patch is missing or mis-attached, and whether there is a short-circuit phenomenon of component pin burrs. Check whether the solder joints of the straight plug-in unit are smooth and round, whether the board surface is clean and tidy, and there is no missing solder. Check the flatness of the luminous dot matrix and the consistency of the ink color.