How to judge the quality of transparent LED screen?
Please read as following:
1, brightness comparison, the acrylic plate close to the same number of modules and then slowly increase a small distance, while watching the lamp bead brightness can meet their own requirements.Of course, the module directly in the word is more direct, the higher the brightness of the lamp bead requirements are also higher, relatively high Chen capital.Pure indoor environment can use low brightness, but if it is a window LED transparent screen or LED glass curtain wall screen, then it is necessary to seek high brightness LED transparent screen.
2, while watching the brightness, we should pay attention to whether the lamp bead light is uniform, when observing the white light must pay attention to whether there is a color difference (this is very important) -- if covered with a thin white paper may not be observed, so use a certain thickness of acrylic.Color difference is the most important part to distinguish between good and bad quality, and it is also one of the main reasons for the price difference of LED transparent screen.
3, wire identification.High quality wire, through UL certification, these transparent LED screen manufacturers are not reliable, so the most direct way is to peel off the skin, count the number of wire cores inside!Modules with 15,17,19 cores or even 20, 30 cores should be as good as modules with 14, 11 cores, and vice versa.
4. Lamp bead temperature.After lighting for a period of time, touch the LED lamp bead with your hand. If the temperature is high or even hot, the stability is not as good as that of low temperature.
5. Solder joint quality.The full welding spot proves that the welding process is good, high brightness proves that the solder is good;The serious is virtual welding, easy to appear bad contact phenomenon, follow-up maintenance trouble.
6. LED transparent screen: there are two ways to make LED transparent screen at present, one is positive luminescence, the other is side luminescence.Although the penetration rate of side luminescence is relatively high, the packaging technology of lamp beads is yet to be tested by the market, and the lamp beads of the traditional led display screen are used for positive luminescence. After market test, the quality is very stable.