Understanding Glue on Board (GOB) Technology in LED Displays

Glue on Board (GOB) refers to the coating of the modules of an LED display with an epoxy resin coating. This produces a strong, smooth finish covering the encapsulated 3-in-1 bulbs.

This epoxy resin coating can be used to cover SMD, IMD and MIP LED displays.

A display that has been covered in an epoxy resin coating is impact and humidity resistant. The edges of an LED display are fragile and a GOB covering provides needed protection. The intrusion of humidity can dramatically reduce the lifespan of LED bulbs. A COB covering will reduce the failure rate of an LED display dramatically. From a practical point of view an epoxy resin covering does not increase the price of an LED display very much. It is well worth the investment.

Fine pitch LED displays are fragile, particularly at the corners and edges of a module, as fine bulbs are tiny. Epoxy resin coatings protect these very fine, tiny bulbs.

There are two (2) types of epoxy resin coatings HOB and GOB. HOB epoxy masking infills between the bulbs, leaving the top of the pixel encapsulation raised. An advantage is that HOB will restrict lateral movement of the bulbs. HOB module seams are much more discreet than GOB epoxy coated modules.

A GOB coating not only completely fills the gaps between the bulbs but also covers the pixel encapsulations and the entire module resulting in a continuous, strong, smooth finish with an added layer of protection.