Vehicle headlamp
AssigneeKoito Manufacturing Co., Ltd.
InventorToshihisa Hayami
Life of this patent
Estimating the term…
Abstract
A vehicle headlamp is provided with a lamp unit, a first actuator for controlling the irradiation direction within the horizontal plane, a second actuator for controlling the irradiation direction within the vertical plane. A communication unit transmits and receives a signal between the actuators and a controller provided outside of the lamp body via a communication line. A glare preventing unit detects an abnormality or a failure of the actuators, the controller, and the communication line, without using the communication unit. The irradiation direction or the lighting state is changed in accordance with a portion where the abnormality or the failure.
Claims9
A vehicle headlamp comprising:
- a lamp unit, wherein an irradiation direction of the lamp unit is controlled in accordance with a traveling condition of the vehicle;
- a first actuator that controls the irradiation direction of the lamp unit within a horizontal plane;
- a second actuator that controls the irradiation direction of the lamp within a vertical plane;
- a controller provided outside of a lamp body;
- a communication unit that transmits and receives a signal between the first and second actuators and the controller via a communication line;
- and
- a glare preventing unit, that directly detects an occurrence of an abnormality at either one of or both the first and second actuators without using the a communication unit, detects as to whether or not a failure occurs at the controller or the communication line, and changes an irradiation direction of the lamp unit or a lighting state including extinction or fading in accordance with a portion where an abnormality or a failure is detected and a portion where none of an abnormality and a failure occurs thereby to prevent an occurrence of glare.
Dependencies are inferred from the claim text.