In recent years, with the concept of healthy lighting slowly into the market,the lamps using COB light source technology have many advantages such as no stroboscope, no electromagnetic radiation, low energy consumption, high illumination and high color rendering index,more and more received in pursuit of the market. At present, LED lighting packaging products on the market are mainly divided into SMD and COB products,due to the low threshold of SMD LED packaging technology, the market demand is large, entering the market early,at present, more than 95% of the lighting LED devices on the market are SMD LED products. In recent years, SMD LED product specifications are concentrated in 2835 and 3030 models.
Another packaging technology is COB packaging technology, that is, Chip on Board packaging technology,Cob Light souce have the following advantages compare SMD leds:
1. High packaging efficiency and cost saving----COB packaging process and SMD production process are not different, but COB packaging has much higher efficiency in dispensing, separation, splitting and packaging
2.Low thermal resistance advantage ------The system thermal resistance of COB package is much lower than traditional SMD package, so the lifespane of COB package LED lamps is longer.
3. Light quality Advantage---COB package is an integrated package, it is a surface light source, with a large Angle of view and easy adjustment, which can reduce the loss of light refraction
4.Application advantages---COB light source is very convenient to use and can be directly applied to lamps without any other process. However, the traditional SMD packaging light source needs to be SMT process firstly and then fixed on the PCB board by reflow welding.
