Patent ID: 7952290

Claim:
A current-regulated light emitting device for vehicle use, said current-regulated light emitting device being adapted to receive a drive voltage from an electric power source and comprising: a light emitting unit including at least one light emitting module that has a light emitting component; and a current limiting unit including a first switch adapted for making and breaking an electrical circuit between said light emitting unit and the electric power source, a first bias unit connected electrically to said first switch, adapted to be connected electrically to the electric power source, and causing said first switch to conduct such that said first switch makes the electrical circuit between said light emitting unit and the electric power source when the electric power source provides the drive voltage to said first bias unit, thereby resulting in current flow from the electric power source through said light emitting unit and said first switch to activate said light emitting unit, a second switch connected electrically to said first switch, and a second bias unit connected electrically to said first and second switches, and causing said second switch to conduct when amount of current flowing through said first switch exceeds a predetermined threshold, wherein conduction of said second switch forces said first switch to turn off so as to break the electrical circuit between said light emitting unit and the electric power source, thereby interrupting the current flow through said light emitting unit.