COB or Chips on Board, is a new technology of LED packaging for LED light engines. Relatively new to the LED market, COB LEDs offer many advantages over the standard options. COB LEDs are basically multiple LED chips (typically nine or more) bonded directly to a substrate by the manufacturer to form a single module. Since the individual LEDs used in a COB are chips and not traditionally packaged, the chips can be mounted such that they take up less space and the highest potential of the LED chips can be obtained.
Advantages of COB LEDs
The use of COB LEDs in lighting applications is increasing as designers realize the benefits of using them over the traditional standard LED options. Being multi-chip packaged, the light emitting area of a COB LED can contain many times more light sources in the same area that standard LEDs could occupy, resulting in a greatly increased lumen output. Due to less components in the LED chip, the thermal conductivity is directed at the circuit board and without traditional LED chip packaging structure, research shows that an average of 25% less heat is emitted from the LED chip. Less heat means much higher efficiency rate and lower failure rates. PC lenses and other traditional LED packaging parts are also no longer needed, therefore light visibility range is increased and light loss from lenses are decreased substantially. Lastly, COB LEDs have a much wider light beam with a lot less glare than a traditional LED. COB LEDs have great advantage of thermal resistance, larger cooling area, better lighting effect and high light efficacy and are therefore a more reliable choice.