COB LED display using the newest encapsulation technology which is different from DIP and SMD. Is ERALED who has developed this technique in the field of led display and truly master the skill after years of technical practice. We have developed hundreds of products based on COB patent technique, and COB encapsulation with LED & IC in 1 PCB is the key of COB patent technique.COB LED is short for Chip-On-Board LED, it's one of bare LED chip technologies, which interconnect bare LED chip to substrate by conductive or non-conductive adhesive, and then wire bonding to achieve its electrical connection. COB package is attach number of chips directly to the substrate, then packaged together by silica gel, epoxy resin or other materials.