Patent ID: 7121697

Claim:
An illumination device for a fan of a computer having a transparent case, comprising: a rotating member releasably secured to a hub of the fan and including a plurality of light-emitting members disposed on an upper surface, a receptacle formed above a center by a predetermined distance, the receptacle including a projected head and an internal electromagnet, a plurality of control circuits provided on a bottom each for periodically controlling an on or off of one or more of the light-emitting members, a coil of wire surrounded by the electromagnet, and positive and negative terminals wherein the terminals, the light-emitting members, and the control circuits form a circuit; and a fixed member releasably secured to the fan and including a central slot snugly coupled to the head for fastening the receptacle and the fixed member together, whereby turning on the computer, the fan, the rotating member, and the coil of wire will rotate so as to cut magnetic lines across a space defined by the electromagnet, induce a voltage in the terminals, and illuminate or flash the light-emitting members.