Headlamp for vehicles and projection method
A headlamp for vehicles that has a light source unit. Numerous light sources and/or light guides are controllable individually. A sensor unit for detects headlamp status data and/or vehicle environment data. A control unit for controlling the light sources and/or light guides generates a predefined light distribution for the headlamp. The range of the headlamp can be adjusted on the basis of sensor signals from the sensor unit. The control unit contains a control element for the light sources and/or light guides for projecting a guide marking onto a road surface. The control unit contains a compensator that compensates for deviations in the guide marking on the basis of a sensor signal generated by the sensor unit.
1 . A headlamp for a vehicle, the headlamp comprising:
a light source unit comprising a plurality of light sources and/or light guides that can be controlled individually;
a sensor unit for detecting headlamp status data and/or vehicle environment data; and
a control unit for controlling the plurality of light sources and/or light guides to generate a predefined light distribution for the headlamp, wherein a range of the headlamp is adjustable based on sensor signals from the sensor unit,
wherein the control unit comprises a control element for the plurality of light sources and/or light guides for projecting a guide marking on a road surface,
wherein the guide marking comprises two tracking lines that converge in front of the vehicle at a convergence angle when the vehicle is traveling in a straight path, and
wherein the control unit comprises a compensator that compensates for deviations in the convergence angle between the tracking lines of the guide marking based on a sensor signal generated by the sensor unit.
2 . The headlamp according to claim 1 , wherein the compensator compensates for the deviations in the convergence angle between the tracking lines of the guide marking based on an operating state of the vehicle and/or an inclination of the light source unit.
3 . The headlamp according to claim 2 , wherein the compensator adjusts the range of the headlamp based on the operating state of the vehicle and/or to compensate for an inclination of the headlamp in relation to a reference position thereof.
4 . The headlamp according to claim 3 , wherein the control unit is configured such that the range of the headlamp in the reference position thereof is dependent on a predefined light distribution for an operating state of the vehicle.
5 . The headlamp according to claim 1 , wherein the plurality of light sources and/or light guides in the light source unit are attached to a mount that remains stationary in a housing for the headlamp.
6 . The headlamp according to claim 1 , wherein the tracking lines form two lane markings that are parallel to lane markings.
7 . The headlamp according to claim 1 , wherein the compensator comprises a compensation dataset in which different pitch angles (φ) are assigned different compensation values, such that the light source unit is controlled with different compensation signals for the compensation values for the different pitch angles (φ).
8 . The headlamp according to claim 7 , wherein the pitch angles (φ) are listed in 1° increments.
9 . The headlamp according to claim 7 , wherein intermediate values between the pitch angles (φ) are calculated through interpolation.
10 . The headlamp according to claim 1 , wherein the light source unit and the control unit are contained in a same housing for the headlamp.
11 . The headlamp according to claim 1 , wherein the control unit for controlling the range of the plurality of light sources and/or light guides and/or a position of the guide marking is outside a housing for the headlamp.
12 . A method for projecting a guide marking onto a road surface via a headlamp for a vehicle, the method comprising:
controlling a plurality of light sources and/or light guides in a light source unit, such that the guide marking for a predefined path, which is based on a vehicle operating parameter, is continuously projected onto the road surface while the vehicle is traveling, wherein the guide marking comprises two tracking lines that converge in front of the vehicle at a convergence angle when the vehicle is traveling in a straight path, and
setting the path of the guide marking based on the vehicle operating parameter, wherein the vehicle operating parameter includes an inclination angle (φ) detected for the vehicle, and wherein deviations in the convergence angle between the tracking lines of the guide marking are compensated for based on the vehicle operating parameter.
13 . The method according to claim 12 , wherein the plurality of light sources and/or light guides are controlled with a control signal with which the guide marking and a range of the headlamp are set.
14 . The method according to claim 12 , wherein a range of the headlamp and the guide marking are set based on the detected inclination angle.
15 . The method according to claim 12 , wherein the plurality of light sources and/or light guides for generating guide markings on the road surface is controlled using a control table containing values for the inclination angle (φ).