Corrector device for automatically correcting the beam direction of vehicle headlamps to compensate for variations in vehicle trim
First Claim
1. A device for automatically correcting the beam direction of a vehicle headlamp when the trim of said vehicle changes, said device comprising:
- an illumination sensor integrated in the vehicle headlamp and fixed to move therewith, said sensor being disposed to detect the luminance of the road in at least one direction at a predetermined angle with the horizontal, said luminance being detected in a region of the road lying in the field illuminated by the headlamp, and said sensor being suitable for generating a signal representative of said detected luminance;
an actuator for varying the inclination of the headlamp sensor assembly relative to the vehicle; and
processor means for generating an actuator control signal as a function of the signal generated by said sensor, in such a manner as to servocontrol sdaid region of the road to have constant luminance.
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Accused Products
Abstract
The corrector device comprises at least one illumination sensor (10, a, b, c) integrated in a headlamp and fixed to move with the headlamp reflector (12), the sensor-reflector assembly normally pointing in such a direction as to detect the luminance of the road in at least one angular direction at a predetermined angle (o+φ+θ) with the horizontal (OY), with processing means being provided that are suitable for generating a corrector signal which is a function of the luminance of the road in said direction, whenever the trim of the vehicle changes, the device further including at least one actuator controlled by said corrector signal in order correct the direction in which the reflector-sensor assembly is pointing.
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Citations
30 Claims
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1. A device for automatically correcting the beam direction of a vehicle headlamp when the trim of said vehicle changes, said device comprising:
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an illumination sensor integrated in the vehicle headlamp and fixed to move therewith, said sensor being disposed to detect the luminance of the road in at least one direction at a predetermined angle with the horizontal, said luminance being detected in a region of the road lying in the field illuminated by the headlamp, and said sensor being suitable for generating a signal representative of said detected luminance; an actuator for varying the inclination of the headlamp sensor assembly relative to the vehicle; and processor means for generating an actuator control signal as a function of the signal generated by said sensor, in such a manner as to servocontrol sdaid region of the road to have constant luminance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification