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May 14,2021| LED Knowledge
LED transparent screen sales are in full swing. From now on, LED transparent screen manufacturers are spreading all over the country. How to judge the quality of LED transparent screen? Some people say that appearance can be used to roughly judge the quality of cabinets. Is it really? The transparent LED panels produced by many manufacturers are very similar, even if they have different appearances and the same structural principles, such as circuit boards, lamp beads, wires, etc., if we find a good transparent with real gold LED display , I will briefly introduce it here. a bit.
1. Brightness comparison. Place the acrylic board close to the same number of modules and slowly increase the distance. See if the brightness of the lamp beads can meet your own requirements. Of course, it is easier to put the module directly in the word. The higher the brightness, the higher the requirements for lamp beads. Pure indoor environment can use low brightness, but if it is a window LED transparent screen or LED glass curtain wall screen, a bright LED transparent screen is required.
2. While observing the brightness, pay attention to whether the light of the lamp beads is uniform. When observing the white light, please pay attention to whether there is a color difference (this is very important)-if you cover it with a thin white paper, it may not be visible. , So use a certain thickness of acrylic. The existence of chromatic aberration is an important link in distinguishing the quality of LED transparent screens, and it is also one of the main reasons for the price difference of LED transparent screens.
3. Identify the wires. High-quality wires, UL certification, these are unreliable, made by LED transparent screen manufacturers, so the most direct way is to peel off the outer skin and count the number of cores! Modules using 15, 17, 19 cores or even 20, 30 cores should not be inferior to modules with 14, 11 cores, and vice versa.
4. Lamp bead temperature. After lighting for a period of time, touch the LED lamp beads by hand. The temperature is very high or even very hot, and it is certainly not as stable as the low temperature.
5. Solder joint quality. All solder joints prove that the soldering process is good, and the high brightness proves that the solder is used well; the more serious one is fake solder, which is prone to poor contact and troublesome follow-up maintenance.
6. LED transparent screen pasting method: At present, there are two production methods for LED transparent screen, one is positive light and the other is side light. Although the side light has a higher light transmittance, the packaging technology of the lamp beads still needs to be tested by the market, and the positive light lamp beads use the traditional LED display lamp beads. After market inspection, the quality is very stable.
7. PCB board thickness. If the PCB board is thick, it will affect the transparency of the LED transparent screen.
In addition to the above points, the waterproof work of the LED transparent screen also needs to be done well.Most of the LED transparent screens have their own waterproof function and will undergo multiple tests before they leave the factory. So how does the LED transparent screen achieve the purpose of waterproofing? Let's learn about the waterproof principle of LED transparent screen together!
The waterproof principle of Led transparent screen
In the process of use, excessive humidity will cause the PCB board, power supply, power cord and other components of the LED transparent screen to be more susceptible to oxidation and corrosion, resulting in failure. So this requires us to make anti-corrosion treatment on the PCB board when making the LED transparent screen, such as coating the surface with three-proof paint, etc., and use high-quality accessories for the power supply and power cord. The selected waterproof box has good airtightness, and the screen must reach IP65. www.aoyika.com Its PCB board welding place is the most likely to be corroded. Pay attention to the protection work, especially the frame, which is easy to rust, and do a good job of anti-rust treatment.
Secondly, for different unit board materials, professional waterproof coatings are needed. Finally, we also need to pay attention to the waterproof problem of the backplane of the outdoor LED transparent screen, because in the process of using the display, the backplane LED transparent screen is not only a heat dissipation treatment, but also a great convenience in handling the waterproof performance. Sex. When dealing with the waterproof coating on the back, pay more attention to the waterproof performance of the small strip-shaped display aluminum-plastic panel on the back. It is necessary to use an electric drill to design a row of drains under the aluminum-plastic panel, which is conducive to the waterproof of the display and the heat dissipation of the display. The best display processing method.