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Vehicle headlamp apparatus

  • US 20040090788A1
  • Filed: 10/31/2003
  • Published: 05/13/2004
  • Est. Priority Date: 11/05/2002
  • Status: Active Grant
First Claim
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1. A vehicle headlamp device comprising:

  • optical-axis deflecting means for deflecting illumination optical axes of headlamps of a vehicle, said optical-axis deflecting means comprising;

    a drive motor as a rotation drive source;

    a plurality of detecting elements for detecting a rotational position of said drive motor; and

    motor drive means for controlling a rotation of said drive motor based on a rotational position of said drive motor detected by said detecting elements, wherein said motor drive means includes a rotation-state recognizing means operating such that when any of said plurality of detecting elements is abnormal, said rotation-state recognizing means recognizes a rotational position of said drive motor based on the output signals of the remaining detecting elements and a predetermined angle prediction time computed using a rotational period of said drive motor.

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