How to choose the LED display?
In recent years, the LED display market is getting bigger and wider. LED display manufacturers are also getting more and more, in addition to the old well-known LED companies, there are also a lot of indiscriminate small manufacturers. Although the market is getting wider and wider, but the competition is also getting bigger and bigger. There are benign technical competition, there are also bad price war. Small new LED manufacturers in order to survive, with low prices to the market, can also quickly open the market, seize a number of customers.
But in many cases, because of technology, quality problems lead to a series of accidents. Following the customer to spend money and time to repair, the loss is not worth it. So, LED display it is not a short time tool, it does not want to cell phone, you can change a year. The reason why there are all kinds of cheap domestic cell phones appear on the market, although the technical quality is not as good as imported apple, but the sales are far more than apple, because the cell phone for consumers is a short time tool, soon changed, do not need to buy special than good.
But the LED display is different, it needs to be used for a long time, 5 years 8 years 10 years. So the low price can never be an important factor for consumers to choose LED display. Good quality, durability is really save money for customers.
As LED, IC belongs to the semiconductor devices, they are picky about the environmental requirements of the conditions of use, preferably at room temperature of about 25 ℃, its working mechanism is the best. But the fact that a large outdoor screen will be applied in different temperature environments, summer may be above 60 ℃, winter may be below -20 ℃. When the manufacturer produces the product is 25 ℃ for the test conditions, the different products are categorized into different grades, can be the fact that the operating conditions of 60 ℃ or -20 ℃, then the LED, IC efficiency and performance inconsistency, may be the original belongs to a grade will become more than one grade, the brightness is inconsistent, the screen also naturally become flowery.
This is because in different temperature conditions, red, green, blue three lights brightness attenuation and decline is different, at 25 ℃, its white balance is normal, but at 60 ℃, the three colors of the LED's brightness has declined, and its attenuation value is inconsistent, so it will produce the whole screen brightness decline and off-color phenomenon, the quality of the whole screen will decline.
The operating temperature range of IC is from -40℃ to 85℃. Due to the external temperature is too high and lead to the temperature rise in the box, if the temperature inside the box is more than 85 ℃, IC will be too high because of the temperature and lead to work instability, or temperature drift is different and produce the current between the channels or the difference between the chip is too large and lead to the screen.
