With the LED display and the application of universal, LED display market in a situation of unprecedented rapid development. In recent years the demand for large-screen LED surge, caused by a variety of large and small factories mushrooming growth, an instant that each home, customers Haochou difficile, but mostly in the form of price-oriented. As the saying goes, but buyers than sellers, sophisticated and generally refers to how smart buyers to keep the prices down, to require the seller, are still too difficult for smart sellers, so sellers an advantage. As the result of half a million did not buy BMW has bought 300,000 of the Jetta.

However, as a credible manufacturers, the industry should be important information to tell buyers in advance in order to give them more choices, not asymmetric information.

Full-color LED large screen over the past few years through the development of crude seems to be looking for a mature industry, in fact, whether domestic or foreign firms, is still a long way to go, especially the large outdoor screen, most of the products after two years of operation , It will be very difficult to maintain in the user's expectations for the period.

Why is it so?

First of all, here there is a big misunderstanding, the majority of people think that the main screen material LED, IC life are up to 100,000 hours, according to the 365 days / year, 24 hours / day operation of the service life of 11 years, most customers only care about With well-known LED and IC. In fact, this is a necessary condition for two, not a sufficient condition, as red, green and blue tubes of three of the reasonable use of the display even more important for the Lamp of different colors, it is necessary to make it work in the best condition for a Good display will be more important. IC reasonable regulation, but also help to overcome the irrational PCB wiring problems. As if a car has a good engine and control circuit, we can not necessarily be a good car. This is a key factor in this:

As the LED, IC semiconductor devices belong to their environmental conditions require the use of fault-finding, it is best at room temperature about 25 ℃, the best mechanism of its work. But the fact is a large outdoor screen will be used in different temperature conditions, in the summer may be over 60 ℃, winter may be below -20 ℃. When the manufacturers to produce products based on 25 ℃ for the test conditions, different products sub-classification of files, the fact that the conditions for the operation of 60 ℃ or -20 ℃, this LED, IC efficiency and performance of the inconsistency, may belong to one of the original file The files will become more, not on the brightness, screen body naturally become spent. This is because the temperature in different conditions, the red, green and blue lights of the three brightness decay and decline are different in 25 ℃, the white balance is normal, but 60 ℃, three color LED Brightness decreased, and the attenuation value of the inconsistent, so the whole screen brightness will have dropped and the color cast, the entire screen quality will drop. The IC then? IC's operating temperature range is -40 ℃ -85 ℃. As the outside temperature is too high temperature of Xiang Tinei a result, if the inside temperature exceeds 85 ℃, IC because the temperature is too high and will lead to job insecurity, or drift difference between the current channel, or too much difference between film and Huaping lead.

At the same time, power is also important, since the power supply in different temperature conditions, the stability of its work, the value of output voltage and load capacity will also bring different, since it assumes the role of logistics support, its ability to guarantee a direct impact on the The quality of the screen.

Box design for the display is also important, on the one hand, it is the protection of the circuit, on the other hand, it is safe, at the same time there is dust-proof, water-proof effect. But more importantly, the thermal cooling loop ventilation system design is good, with the boot time and the outside temperature, the components of the thermal drift will increase, leading to deterioration of image quality.

All these factors are interrelated, will influence the display quality and life expectancy. Therefore, customers in the selection screen, to observe a comprehensive analysis to make the right judgments.

The temperature also affected the big screen Not only that, it is assumed that customers have purchased a wide 10-meter high 6 meters (60 square meters) of the big screen, though not the total area, but within each unit is composed of boxes, each unit between me The temperature may not be balanced, Xiang Tinei temperature will be affected by the convection of air temperature and inconsistent, leading to cell box, or cabinet units within the different temperatures, brought the efficiency of semiconductor devices are inconsistent, so for the performance of the LED lights Brightness light-emitting different looks, "flower" screen.



Reference link: http://www.17led.com/LEDdisplay/2008-03/27.html