SYSTEM FOR GENERATING A LIGHT BEAM IN THE AREA IN FRONT OF A MOTOR VEHICLE
First Claim
1. A system for producing a light beam in the front area of a motor vehicle comprising:
- a headlamp comprising at least one LED array of multiple light emitting diodes (LEDs) each of which can electrically be controlled separately,an object detection device for detecting objects within the surrounding area of the vehicle,a positioning device for determining the position of a detected object relative to the motor vehicle,the light beam produced by the LED array in connection with an optical imaging system has at least a horizontal illuminance distribution wherein each illuminance can be selectively varied for each of a plurality of different positions in front of the motor vehicle and for each of a plurality of different horizontal angles relative to a reference direction,the horizontal angles of the contributions from at least two LEDs to the illuminance distribution overlap at least partially,a range of glare-critical horizontal angles is determined for each detected object depending on the object'"'"'s position relative to the motor vehicle and depending on at least one of an assumed or a determined object width,the individual LEDs are controlled considering the overlap of the horizontal angles of their contributions to the illuminance distribution, such that an illuminance limit value is not exceeded within the glare-critical horizontal angle range and related to the position of the detected object.
2 Assignments
0 Petitions
Accused Products
Abstract
A system is described for generating a light beam in the area in front of a motor vehicle, which system has the following components—a headlight which comprises at least one LED array comprising a plurality of light emitting diodes (LEDs) which can be electrically actuated separately, —an object detection device for detecting objects in the area around the motor vehicle, and—a position determining device for determining the position of a detected object relative to the motor vehicle. In this context, the light beam which is generated by the LED array in conjunction with an optical imaging system can be characterized by at least one horizontal illumination intensity distribution value, in which the contributions of at least two LEDs to the illumination intensity distribution value overlap at least partially in terms of the horizontal angle, wherein the illumination intensity can be defined respectively for a) different positions in front of the motor vehicle and b) different horizontal angles relative to a reference direction. For a detected object, a horizontal angle range which is critical in terms of dazzle is then identified in each case as a function of the position of the object with respect to the motor vehicle and as a function of an assumed or identified object width, and the individual LEDs are driven, while taking into account the overlapping, in terms of horizontal angle, of their contributions to the illumination intensity distribution value, in such a way that an illumination intensity limiting value is not exceeded in the horizontal angle range which is critical in terms of dazzle and in terms of the position of the detected object.
44 Citations
20 Claims
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1. A system for producing a light beam in the front area of a motor vehicle comprising:
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a headlamp comprising at least one LED array of multiple light emitting diodes (LEDs) each of which can electrically be controlled separately, an object detection device for detecting objects within the surrounding area of the vehicle, a positioning device for determining the position of a detected object relative to the motor vehicle, the light beam produced by the LED array in connection with an optical imaging system has at least a horizontal illuminance distribution wherein each illuminance can be selectively varied for each of a plurality of different positions in front of the motor vehicle and for each of a plurality of different horizontal angles relative to a reference direction, the horizontal angles of the contributions from at least two LEDs to the illuminance distribution overlap at least partially, a range of glare-critical horizontal angles is determined for each detected object depending on the object'"'"'s position relative to the motor vehicle and depending on at least one of an assumed or a determined object width, the individual LEDs are controlled considering the overlap of the horizontal angles of their contributions to the illuminance distribution, such that an illuminance limit value is not exceeded within the glare-critical horizontal angle range and related to the position of the detected object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification