Continuously variable headlamp control

  • US 6,049,171 A
  • Filed: 09/18/1998
  • Issued: 04/11/2000
  • Est. Priority Date: 09/18/1998
  • Status: Expired due to Term
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First Claim
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1. A method for controlling continuously variable headlamps comprising:

  • obtaining an image in front of the continuously variable headlamps, the image covering an area including points at which a driver in a vehicle in front of the continuously variable headlamps would perceive the continuously variable headlamps as causing excessive glare if the continuously variable headlamps were at full illumination range;

    detecting an ambient light level based on the obtained image;

    setting the continuously variable headlamps to daylight mode if the ambient light level is greater than a first threshold;

    setting the continuously variable headlamps to low beam mode if the ambient light level is less than the first threshold but greater than a second threshold; and

    enabling automatic headlamp dimming if the ambient light level is less than the second threshold.

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