IP rating grade is very important for LED displays. We talk about it frequently,such as IP65, IP43, IP31 and IP40. Higher IP grade gets better water and dust protection, particularly for outdoor fixed LED displays,
IP Rating grade is different for indoor and outdoor LED screens.
IP rating grade depends on the working environment. For example, Outdoor LED screens works in a harsh environment such as rain, snow, hail, fog, and blizzard. Indoor LED screen has a rather mild environment. Therefore, they has different IP grade to protect it from damage.
What is the standard for LED screens
Generally, outdoor LED screen has IP65 at least. Sometimes, it requires IP67 or IP68 if they are under the water. In the other words, indoor LED screen has IP43. And sometimes, it is only IP40. But in some indoor environment, it requires IP 65 also. For example, the screen is nearby an interior swimming pool. Then, use GOB technology to protect the screen.
What is IP Rating or IP Code
The IP rating or IP code classifies the degree of protection provided by an enclosure. They are defined by the international standard EN 60529 (British Standard BS EN 60529:1992). This standard defines levels of sealing effectiveness against “ingress” i.e. intrusion from foreign bodies such as tools, dirt and liquid water.
What do the two digits in an IP grade mean?
The rating consists of the letters IP followed by two digits, the higher the number the better the protection. Sometimes a number is replaced by X, which indicates that the enclosure is not rated for that specification. Here we use IP65 as an example.
IP65 = First Digit – Solids
The first digit indicates the level of protection that the enclosure provides against the ingress of solid foreign objects, from tools or fingers that could be hazardous if they came into contact with electrical conductors or moving parts, to airborne dirt and dust that could damage circuitry.
IP65 = Second Digit – Liquids
The second digit defines the protection of the equipment inside the enclosure against various forms of moisture (drips, sprays, submersion etc).
|The table of IP Rate
How we get high IP grade for LED screen
First, the design is essential. LED screen is spliced with many LED panels or LED cabinets. And LED modules are fixed on the LED cabinet. So LED cabinet is waterproof and has waterproof gasket. Similarly, LED modules should have waterproof rim also to fit the cabinet.
Second, glue is vital. We brush transparent glue in the back of the LED module for anti-moisture and dust. Meanwhile, we inject black glue in the front of the LED module where LEDs are soldered. It is stroke by sunlight, rain, snow, etc. Black glue protects it from damage.
Third, high quality material. For example, the LED module is with plastic. After years aged,, the plastic is brittle and deformed if it has low quality. The LED module can not fit the cabinet correctly. Rain can flow inside the cabinet and destroyed the electronics easily.
At last, waterproof test before shipping. Overall, it is a complex system and craft. Is the higher the better? Sometimes, it is yes, but not all. Higher ingress protection means higher cost. In the meanwhile, we need to consider the heat dissipation also. If the screen does not work under the water, there is no need IP67.
|This machine injects black glue on the front of PCB for IP Grade 65
Here are some links how we do waterproof test.