The differences between SMD lamp beads and COB lamp beads are different in technology, cost and low thermal resistance.

　　First, the technology is different

　　1. SMD lamp bead: SMD is the abbreviation of Surface Mounted Devices, which means: Surface Mount Device, which is one of SMT(Surface Mount Technology) components. SMD lamp bead is the lamp bead encapsulated by this technology.

　　2. COB lamp bead: COB(chip On board) is bonded on the printed board, because IC suppliers are reducing the output of QFP (a packaging method QFP(SMT parts) in LCD control and related chip production. Therefore, the traditional SMT method will be gradually replaced in future products. COB lamp bead is the lamp bead encapsulated by this technology.

　　Second, the cost is different

　　1. SMD lamp beads: The labor and manufacturing costs of traditional SMD lamp beads account for about 15% of the material cost.

　　2. COB lamp beads: The labor and manufacturing costs of COBLED lamp beads account for about 10% of the material cost, and COB? LED lamp beads can save 5% in labor and manufacturing costs.

　　Third, the low thermal resistance is different

　　1. SMD lamp beads: The system thermal resistance of traditional SMD lamp beads is: solder paste, copper foil, insulating layer and aluminum of chip die bonding glue.

　　2. COB lamp bead: The system thermal resistance of COBLED lamp bead is: die bonding aluminum. COB? The system thermal resistance of LED lamp beads is much lower than that of traditional SMD lamp beads, which greatly improves the LED life.