After several years of development, It roughly seems that LED full-color large screen ia a matured industry. In fact, whether domestic or foreign manufacturers, still have a long way to go, especially the outdoor large screen. The vast majority of products after two years of operation , it is difficult to maintain the user's expectations.
What are the reasons?
1. First of all, there is a big misunderstanding that most people think that the lifespan of main material of LED Screen, such as LED lamp and IC, are up to 100,000 hours, according to 365 days / year, 24 hours / day operation, the service life of them is more than 11 years, so most customers Only concerned about the well-known LED lamp and IC. In fact, these two are only necessary conditions, rather than sufficient conditions, because the red, green and blue three kinds of lamp reasonable use of the display is more important for different colors of the lamp, to make it work in the best condition, for a Good display will be more important. IC reasonable adjustment, but also help to overcome the unreasonable PCB wiring problems. It is like a car with a good engine and circuit control, not necessarily be able to become a good car. The key factor here is this:
As the LED, IC are semiconductor devices, their use of the environment requirements critical, preferably at room temperature 25 ℃ or so, its working mechanism is the best. But in fact an outdoor large screen will be used in different temperature environment, the summer may be above 60 ℃, winter may be below -20 ℃. When the manufacturers produce products is 25 ℃ for the test conditions, the different product classification, can be the actual conditions of operation for the 60 ℃ or -20 ℃, then LED, IC efficiency and performance is inconsistent, may belong to a file The will become a multi-file, the brightness is inconsistent, the screen body also naturally spent.
This is because in different temperature conditions, red, green and blue lamp brightness attenuation and decline is different, at 25 ℃, the white balance is normal, but at 60 ℃, the three colors of the LED The brightness has declined, and its attenuation value is inconsistent, it will produce the whole screen brightness and color cast phenomenon, the quality of the whole screen will decline. The IC? IC operating temperature range is -40 ℃ -85 ℃. Due to the outside temperature is too high and lead to the temperature inside the box, if the box temperature exceeds 85 ℃, IC will be because of the high temperature caused by unstable work, or different temperature drift caused by inter-channel current or between the differences are too large Leading to Huaping.
2, power is also very important. As the power supply in different temperature conditions, its work stability, output voltage and load capacity will be different, because it is responsible for the role of logistics support, so its ability to support a direct impact on the quality of the screen.
3, the box design is also very important for the display, on the one hand it is the role of circuit protection, on the other hand is the role of security, as well as dust, water. But more importantly, the ventilation and heat of the thermal circuit system design is good, with the boot time and the external temperature increases, the thermal drift of components will increase, resulting in poor image quality.
These factors are interrelated, will affect the quality and life of the display. So customers in the selection screen, but also a comprehensive observation and analysis, to make the right judgments.
High - quality suppliers recommended: Shenzhen LightS Technology CO., Ltd