HANDLE MOISTURE IN LED
How Does Moisture Damage led display
Water can cause many problems with the performance and reliability of electronic devices. It is estimated that one in five electronic devices suffers from moisture-induced corrosion worldwide. Moisture can also affect the quality, lifespan, and user experience of LED displays by causing abnormal-luminous LED pixel columns and dead pixels.
Moisture can damage your LED video wall by harming the critical components, such as lamps and IC. These components are sensitive to moisture and can short-circuit or malfunction. This can lead to LED caterpillar failure, which is when some LED pixels light up randomly or not at all. This usually happens during the wet season, in high-humidity environments, or after a long period of inactivity.
What is dehumidification?
Dehumidification is a service that can help you protect your LED module(s) from moisture damage. It works by displaying a dark screen and gradually changing it to a lighter screen. This way, the circuitry heats up slowly and removes the humidity. The whole process takes about 70 minutes.
Humidity can shorten the lifespan of your LED display, so using this service can prevent that. You should use this service when your LED display has been exposed to a high-humidity environment. See “When should dehumidification be done for my dvLED?” for more details. You should also avoid using your LED display in a humid environment for too long.
When an LED screen is not in use, the LEDs will start absorbing moisture from the air, no matter if it is an indoor or outdoor screen. The longer the time and the higher the humidity of the air, the more moisture will be absorbed by the LED. When the LED contains moisture, there is a risk of damaging the LED when the LED heats up too aggressively.
When to take Dehumidification?
- being installed for the first time,
- in a rainy season, a snowy season, and/or in a coastal area,
- un-used for a long time (3+ months)
Therefore, VISIONPI recommends that if you have not used a screen for a prolonged time and/or the screen was stored in a very humid environment, you slowly heat up the screen. In our manuals, we have a 12-step recommendation for heating up the screen (and thus drying out the LEDs):
“The moisture needs time to evaporate and come out of the LED”
Basically the slower you ramp up and the longer time you spend at each step, the better. The moisture needs time to evaporate and come out of the LED. In case it is not possible to follow the above schedule, any reduced form of the above schedule is better than not doing anything at all.
One extreme example of a reduced schedule is when you would first power the screen up on site when the wall has just been built. Don’t immediately put it at 100%, but start at a lower brightness and gradually increase it. With this recommendation, we hope to have helped you keep your products healthy.
Intelligent Dehumidification
Intelligent Dehumidification Technology can also help to get the moisture out during daily use of the LED screens. Three dehumidification modes are set to dehumidify the video wall based on measurements of a variety of complex environments and the unused duration of the LED wall. Simply run the current-gain dehumidification program automatically or manually to easily complete the dehumidification maintenance of your LED video wall.
