Patent ID: 7452106

Claim:
A circuit device for controlling N light-emitting devices disposed on an object, N being an integer larger than 1, and each of the N light-emitting device comprising a light-emitting diode, said circuit device comprising: a water-proof enclosure embedded in the object; a motion-actuated switch, mounted in the water-proof enclosure, for triggering a controller in response to a motion of the object; the controller, mounted in the water-proof enclosure, electrically connected to the motion-actuated switch and each of the light-emitting diodes, for driving the N light-emitting diodes lighting based on a first pre-defined lighting sequence and a second pre-defined lighting sequence followed the first pre-defined lighting sequence when triggered by the motion-actuated switch; and a battery, mounted in the water-proof enclosure, for supplying said circuit device with electrical power; wherein in the first pre-defined lighting sequence the N light-emitting diodes lighting sequentially and the flashing period for each light emitting diode is equal, and in the second pre-defined lighting sequence is the N light-emitting diodes lighting sequentially and the flashing period for each light emitting diode is gradually increased.