Chip On Board (COB) Light SourcesChip on board (COB) light sources are a type of optoelectronic device that is used to provide illumination in a variety of applications. COB light sources are composed of a number of light-emitting diodes (LEDs) that are mounted directly onto a circuit board, without the use of individual LED packages. This allows for a high density of LED chips to be placed on the board, providing a high-intensity, uniform light source. COB light sources are commonly used in applications such as general lighting, display lighting, and automotive lighting, where a high-intensity, compact light source is needed.