Vehicle headlamp optical axis control system
First Claim
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1. A lamp optical axis control system for a vehicle having a lamp with an optical axis for providing an illumination range in front of the vehicle, said control system comprising:
- vehicle speed detecting means for detecting a vehicle speed;
steering angle detecting means for detecting a steering angle of a steering wheel;
driver'"'"'s viewpoint calculating means for providing a position of a driver'"'"'s viewpoint a predetermined time in advance according to the vehicle speed and the steering angle, wherein said driver'"'"'s view point calculating means comprises;
a map for providing standard positions of the driver'"'"'s view points that correspond to vehicle speeds and steering angles; and
correcting means for correcting the standard position of said driver'"'"'s viewpoint by multiplying said standard position by a prescribed coefficient proportional to the vehicle speed if the vehicle speed is different from said standard vehicle speed; and
control means for controlling said optical axis according to the future position of the driver'"'"'s view point, thereby moving said illumination range to cover said driver'"'"'s viewpoint.
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Abstract
A lamp'"'"'s optical axis control system for a vehicle includes vehicle speed sensor, steering angle sensor, a circuit for calculating driver'"'"'s viewpoint and a controller for controlling the optical axis according to the position of the driver'"'"'s view point. The controller indicates the position of the driver'"'"'s viewpoint a certain time in advance according to the vehicle speed signal and the steering angle signal. Therefore, the illumination range of the headlamps can timely provides a desirable driver'"'"'s view point.
18 Citations
7 Claims
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1. A lamp optical axis control system for a vehicle having a lamp with an optical axis for providing an illumination range in front of the vehicle, said control system comprising:
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vehicle speed detecting means for detecting a vehicle speed;
steering angle detecting means for detecting a steering angle of a steering wheel;
driver'"'"'s viewpoint calculating means for providing a position of a driver'"'"'s viewpoint a predetermined time in advance according to the vehicle speed and the steering angle, wherein said driver'"'"'s view point calculating means comprises;
a map for providing standard positions of the driver'"'"'s view points that correspond to vehicle speeds and steering angles; and
correcting means for correcting the standard position of said driver'"'"'s viewpoint by multiplying said standard position by a prescribed coefficient proportional to the vehicle speed if the vehicle speed is different from said standard vehicle speed; and
control means for controlling said optical axis according to the future position of the driver'"'"'s view point, thereby moving said illumination range to cover said driver'"'"'s viewpoint.
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2. A lamp optical axis control system for a vehicle having a lamp with an optical axis for providing an illumination range in front of the vehicle, said control system comprising:
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vehicle speed detecting means for detecting a vehicle speed;
steering angle detecting means for detecting a steering angle of a steering wheel;
driver'"'"'s viewpoint calculating means for providing a position of a driver'"'"'s viewpoint a predetermined time in advance according to the vehicle speed and the steering angle, wherein said driver'"'"'s view point calculating means comprises;
a map for providing standard positions of the driver'"'"'s view points that correspond to vehicle speeds and standard steering angles; and
correcting means for correcting the standard position of said driver'"'"'s viewpoint by multiplying said standard position by a prescribed coefficient proportional to steering angle if the steering angle is different from said standard steering angle; and
control means for controlling said optical axis according to the future position of the driver'"'"'s view point, thereby moving said illumination range to cover said driver'"'"'s viewpoint.
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3. A lamp optical axis control system for a vehicle having a lamp with an optical axis for providing an illumination range in front of the vehicle, said control system comprising:
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vehicle speed detecting means for detecting a vehicle speed;
steering angle detecting means for detecting a steering angle of a steering wheel;
driver'"'"'s viewpoint calculating means for providing a position of a driver'"'"'s viewpoint a predetermined time in advance according to the vehicle speed and the steering angle, wherein said driver'"'"'s view point calculating means comprises;
a map for providing standard positions of the drivers'"'"' view points that correspond to vehicle speeds and steering angles; and
correcting means for correcting the standard position of said driver'"'"'s viewpoint by multiplying a prescribed control coefficient that is a function of a change of the vehicle speed; and
control means for controlling said optical axis according to the future position of the driver'"'"'s view point, thereby moving said illumination range to cover said driver'"'"'s viewpoint.
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4. A lamp optical axis control system for a vehicle having a lamp with an optical axis for providing an illumination range in front of the vehicle, said control system comprising:
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vehicle speed detecting means for detecting a vehicle speed;
steering angle detecting means for detecting a steering angle of a steering wheel;
driver'"'"'s viewpoint calculating means for providing a position of a driver'"'"'s viewpoint a predetermined time in advance according to the vehicle speed and the steering angle, wherein said driver'"'"'s view point calculating means comprises;
a map for providing standard positions of the driver'"'"'s view points that correspond to vehicle speeds and steering angles;
and correcting means for correcting the standard position of said driver'"'"'s viewpoint by multiplying a prescribed control coefficient that is a function of a change of the steering angle; and
control means for controlling said optical axis according to the future position of the driver'"'"'s view point, thereby move said illumination range to cover said driver'"'"'s viewpoint.
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5. A lamp optical axis control system for a vehicle having a lamp with an optical axis for providing an illumination range in front of the vehicle, said control system comprising:
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vehicle speed detecting means for detecting a vehicle speed;
steering angle detecting means for detecting a steering angle of a steering wheel;
a map for providing a standard viewpoint a predetermined time in advance by a standard swiveling angle of the optical axis and a standard distance according to a vehicle speed and a steering angle;
correcting means for correcting the standard swiveling angle to provide a desired viewpoint covered by the illumination range; and
control means for controlling the optical axis according to the corrected swiveling angle. - View Dependent Claims (6, 7)
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Specification