Patent ID: 6679771
Filing Date: 2004-01-20
Classification: H05K

Abstract:
A cooling fan with a light-emitting device comprising:a frame with a center having a housing having multiple LED holes formed in and pass through the housing; and a stud perpendicularly extruded from the center of the frame; a circuit board with a center portion punched out to go through the stud; a stator mounted around the stud; an impeller with a center having a casing with an inside-perimeter; and a shaft formed in the center of the impeller and extending through the stator to the stud; multiple permanent magnets formed around the inside-perimeter of the casing and each having multiple poles; a drive circuit embedded on the circuit board and electrically connected to the stator to control the rotation of the impeller; and a light-emitting diode (LED) mounted in each of the LED hole and electrically connected to and controlled by the drive circuit.