Whether the light is uniform
When investigating brightness, we should pay attention to the uniformity of the light beads. When looking at white light, be sure to watch for chromatic aberration (this is important) - if you cover it with thin white paper, you may not be able to see it, so you need to use a certain thickness of acrylic. Colorimetric aberration is an important part of identifying quality, and it is also one of the main reasons for the price difference of LED transparent screens
Wire identification
The high-quality wires have passed the UL certification. The manufacturer's manuals that have passed the LED transparent screen are unreliable, so the most direct way is to pull out the outer sheath and count the number of cores inside! For 15, 17, 19 cores or even 20, 30 cores modules will not be worse than 14, 11 cores and vice versa.
lamp bead temperature
After lighting for a period of time, touch the LED beads with your hand, the temperature is very high and it must not be as stable as the low temperature.
Solder joint quality
The fullness of the solder joints proves that the welding process is good, and the high brightness proves that the solder is used well; the severe ones are virtual soldering, which is prone to poor contact and troublesome follow-up maintenance.
LED transparent screen sticker light method
At present, there are two production methods for LED transparent screens, one is positive light emission, and the other is side light emission. Although the transmittance of side lighting is relatively high, the lamp bead packaging technology needs to be checked by the shopping mall, and the light-emitting lamp be
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