The influence of complex temperature on LED display

LED displays are very picky about ambient temperature. Theoretically, at room temperature of about 25°C, its working state is ideal.

But in fact, the ambient temperature of outdoor displays is quite complicated in application. The highest temperature in summer may be above 60°C, and the lowest temperature in winter may be below -20°C. The working efficiency and performance of LEDs and ICs are inconsistent, the brightness is inconsistent, and the overall display of the screen naturally changes.

Under different temperature conditions, the brightness attenuation and decline of red, green and blue lamps are different. At 25°C, the white balance is normal, but at 60°C, the brightness of the three colors of LEDs are all the same. It has decreased, and its attenuation value is inconsistent, so the phenomenon of brightness drop and color cast of the entire screen will occur, and the quality of the entire screen will decrease.

And what about IC?

The working temperature range of IC is -40℃-85℃. The temperature inside the box increases due to the high outside temperature. If the temperature inside the box exceeds 85°C, the IC will work unstable due to the high temperature, or the current between channels or the difference between chips will be too large due to different temperature drifts. lead to Huaping.

Now display manufacturers are working hard to make a lot of improvements in design and process, which can effectively control the impact of external ambient temperature on the final effect of the display, so that the LED display can be displayed perfectly under various complex conditions as much as possible.