1. Brightness comparison, close the acrylic board to the same number of modules and then slowly increase a small distance, here to see if the brightness of the lamp beads can meet your requirements. Of course, it is more direct to put the module directly in the word. The higher the brightness, the higher the requirements for the lamp beads, and the higher the cost. Pure indoor environment can use low brightness, but if it is a window LED transparent screen or LED glass curtain wall screen, then a bright LED transparent screen is required.
2. While watching the brightness, pay attention to whether the light of the lamp beads is uniform. When observing the white light, be sure to pay attention to whether there is any chromatic aberration (this is quite important)-if you cover it with a thin white paper, you may not be able to observe it. , So use a certain thickness of acrylic. The presence or absence of color difference is the most important part of distinguishing quality, and it is also one of the main reasons for the price difference of LED transparent screens.
3. Wire identification. High-quality wires, through UL certification, these transparent LED screen manufacturers explain that they are not reliable, so the most direct way is to remove the outer skin and count the number of cores inside! Use 15,17,19 cores or even 20, 30 cores The cable module should be no worse than the 14- and 11-core modules, and vice versa.
4. Lamp bead temperature. After lighting up for a period of time, touch the LED lamp beads with your hand, the temperature is very high or even hot, it is certainly not as stable as the low temperature.
5. Solder joint quality. The full solder joints prove that the soldering process is good, and the high brightness proves that the solder is used well; the more serious is the false soldering, which is prone to poor contact and troublesome follow-up maintenance.
6. LED transparent screen sticking method: currently there are two production methods for LED transparent screen, one is positive light and the other is side light. Although the side-emitting light has a relatively high transmittance, the packaging technology of the lamp beads has yet to be tested by the market, and the positive-emitting lamp beads are those of the traditional LED display. After market inspection, the quality is very stable.
7, PCB board thickness. If the positive-emitting PCB board is thicker, it will affect the transmittance of the LED transparent screen.