一．What is COB?
COB, (Chips on Board) , multi LED chips are packaged together as one lighting module. COB LEDs have great advantage of thermal resistance, larger cooling area, better lighting effect and high light efficacy.
二. Atvantage of COB LED.
1, COB LED is less thermal resistance
Among different LED components such as high power LED, SMD, dip etc, COB LED is the best in less thermal resistance and cooling.
For high power LED, the total Thermal Resistance are a. LED attach, b. Slug, c. Epoxy, d. PCB
Thermal Resistance: A+B+C+D
But for COB LED, are only . a. LED attach + d. PCB.
Thermal Resistance: A+D
So the COB LED is less thermal resistance, so the heat generated from LED chip can conduct outside quickly. Then assure the LED has long lifetime and high quality.
2. COB LED is better lighting effect