LED COB is Chips on Board, which means the chip is directly packaged on the PCB.
The COB light strip is a light strip that encapsulates the chip on a flexible board.
Most of the chips use flip chips, which are linear solid crystals on the PCB board, and then a layer of encapsulating glue mixed with phosphor powder is directly dropped on the surface of the chip.
The appearance is like ramen sticking to the PCB board.
The light emitted by the chip is refracted, reflected, and interacted with the phosphor in the encapsulation colloid.
The colloid uniformly emits light of different colors and color temperatures.