LED displays and light bars are widely used in damp and harsh environments such as traffic roads, outdoor squares, and airports. It is bound to have higher requirements for the protection level of LED products.
Compared with the traditional glue filling method, the parylene coating has a thinner and uniform film, better heat dissipation, less cracking, conforms to international environmental protection requirements, and can meet the dustproof and waterproof requirements of IP55-IP68 of international standards. Therefore, in recent years, Parylene coating has been widely used in the protection of LED products, making it have better functions such as moisture resistance, water resistance, acid and alkali resistance, and corrosion resistance.
The market requires the service life of OLED display devices to be greater than 10,000 hours, and OLEDs are very sensitive to water vapor and oxygen. Its organic light-emitting materials and active metal cathodes are easy to react with water vapor and oxygen to damage the device.
The water vapor permeability of the Parylene coating is very low, which reliably isolates the OLED device from the outside water and oxygen, protects the luminescent material and the active metal cathode, thereby increasing the service life of the OLED.