How about the GOB led screens ?

Glue on board is short for GOB.Filling a layer of glue on the surface of the modules to improve the protection of the entire screen. 

It is a packaging technology.It is a technology to solve the problem of LED diodes protection. 

It uses an advanced new transparent material to encapsulate the substrate and its LED packaging unit to form effective protection. 

The material not only has ultra-high transparency performance, but also possesses ultra- high thermal conductivity. 

The GOB LED display can be adapted to any harsh environment,realizing the characteristics of true moisture resistance, waterproof, dustproof, impact resistance, UV resistance and so on

GOB led technology is not a new one,but not widely used, because of the higher material costs,the process is complex and the efficiency is low,however, as the development,it will be popular according to the advantages of Anti-knock, anti-bump, waterproof, dustproof and anti-static, better for outdoor products.