What is Difference with LED SMD Vs COB Lighting?

First of all, we need to understand what SMD and COB lamp beads specifically refer to?

SMD is "Surface Mounted Devices", which refers to surface-mounted devices, which are one of the surface-mount technology components.

COB is "chip on board", which refers to chip on board packaging and is one of the bare chip mounting technologies.

The difference between SMD and COB as follows:

• Different production efficiency

SMD: SMD's production efficiency is low.
COB: The production efficiency of COB is higher than SMD.

• Different light source quality

SMD: smd is a point light emitted by multiple point light sources attached together. SMD's discrete devices exist point light and glare.
COB: Cob is a surface light. Compared with smd, the illumination is more uniform, there is no halo, the angle beam of COB is large and easy to adjust, there is no spot light or glare.

• The productive process is different

SMD: The LED chip is made of conductive glue and insulating glue fixed on the pad of the lamp bead holder,  then welded with the same conductivity as the COB package. After the performance test, it is encapsulated with epoxy resin and then The process of splitting, cutting and taping, and transporting to the screen factory.

COB: The LED chip is directly fixed on the pad of the lamp bead lamp position of the PCB board with conductive glue and insulating glue, and then the conduction performance of the LED chip is soldered. After the test is completed, the epoxy chip is encapsulated.

• The technology is different

SMD: During the LED, it needs to be mounted first, then fixed on the PCB board by reflow soldering.
COB: No mounting and reflow soldering process is needed. The COB light source is directly applied to the lamp.

• Different costs

1. SMD lamp beads: The labor and manufacturing costs of traditional SMD lamp beads account for approximately 15% of the material cost.
2. COB lamp beads: The labor and manufacturing costs of COB-LED lamp beads account for about 10% of the material cost. With COB LED lamp beads, the labor and manufacturing costs can be saved by 5%.

• The choice of color temperature

COB is mostly single color temperature, SMD can do multi-color temperature, multi-color temperature is mixed color temperature light, SMD structural physical characteristics can meet a variety of color temperature choices.

• Practical application

Based on the above points, what is the difference between the practical application of SMD and COB in LED lamps? Due to the SMD packaging structure, SMD LED lighting cannot be applied to compact lighting systems. COB can live in high temperature for a long time, and has good application prospects for street lighting systems and high-pressure industrial lighting.