Patents Assigned to Hakuyo Denkyu Kabushiki Kaisha
  • Patent number: 5442258
    Abstract: An LED lamp device is made up of an LED emitter, a pair of DC voltage input terminals, a circuit connecting between the LED emitter and the pair of DC voltage input terminals, and at least one constant-voltage diode and at least one constant-current diode which are interposed in the circuit. The LED lamp device further has an adapter for mounting on one end thereof the LED emitter, and a base fixed to the other end of the adapter. The lighting parts such as the constant-voltage diode or the like are contained inside the adapter and the base.
    Type: Grant
    Filed: May 4, 1994
    Date of Patent: August 15, 1995
    Assignee: Hakuyo Denkyu Kabushiki Kaisha
    Inventor: Yoshihiko Shibata