Vehicle headlamp including control to reduce illuminance of additional light distribution pattern and method of controlling the same
First Claim
1. A vehicle headlamp comprising:
- a light source which is configured to form a low-beam mode light distribution pattern and an additional light distribution pattern, which is formed above a cut-off line of the low-beam mode light distribution pattern;
a vehicle detection device which is configured to detect a presence of a front running vehicle;
a road position detection device which is configured to detect an existing area of a road ahead; and
a control unit which is configured to acquire information from the vehicle detection device and the road position detection device and, when the existing area includes a non-detectable area which is outside of a detectable area of the vehicle detection device, the control unit controls the light source to reduce an illuminance of the additional light distribution pattern.
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Accused Products
Abstract
A vehicle headlamp is provided. The vehicle headlamp includes a light source which is configured to form an additional light distribution pattern which is formed above a cut-off line of a low-beam mode light distribution pattern; a vehicle detection device which is configured to detect a presence of a front running vehicle; a road position detection device which is configured to detect an existing area of a road ahead; and a control unit. The control unit acquires information from the vehicle detection device and the road position detection device and, when the existing area includes a non-detectable area which is outside of a detectable area of the vehicle detection device, controls the light source to reduce an illuminance of the additional light distribution pattern.
16 Citations
8 Claims
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1. A vehicle headlamp comprising:
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a light source which is configured to form a low-beam mode light distribution pattern and an additional light distribution pattern, which is formed above a cut-off line of the low-beam mode light distribution pattern; a vehicle detection device which is configured to detect a presence of a front running vehicle; a road position detection device which is configured to detect an existing area of a road ahead; and a control unit which is configured to acquire information from the vehicle detection device and the road position detection device and, when the existing area includes a non-detectable area which is outside of a detectable area of the vehicle detection device, the control unit controls the light source to reduce an illuminance of the additional light distribution pattern. - View Dependent Claims (2, 3, 4, 5)
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6. A vehicle headlamp for a vehicle, the vehicle headlamp comprising:
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a light source comprising a low-beam mode lamp which forms a low-beam mode light distribution pattern, and an additional mode lamp which is configured to form an additional light distribution pattern above a cut-off line of the low-beam mode light distribution pattern; a vehicle detection device which is configured to detect a presence of another vehicle in a detectable area; a road position detection device which is configured to detect a road area of a road in front of the vehicle; and a control unit which is configured to acquire information from the vehicle detection device and the road position detection device;
to determine if the road area includes an area which is outside the detectable area of the vehicle detection device; and
if the road area includes the area which is outside of the detectable area of the vehicle detection device, to control the light source to reduce an illuminance of the additional light distribution pattern. - View Dependent Claims (7, 8)
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Specification