Method and system for alerting a truck driver

1. A signal system for alerting a truck driver in a driver cabin of a truck, the driver cabin having a curved windshield and side windows, said system comprising:

a plurality of light sources arranged in array to project a signal light against the windshield and/or side windows, the array of light sources provided on an elongated support that is curved towards the windshield or the side windows along a horizontal contour of the windshield and side windows, outside a line of sight of the driver, and arranged to show a mirror image of the light sources in the windshield or the side windows along a horizontal lower contour of the curved windshield or side windows, visible to the driver;

a tracking controller, coupled to at least one object sensor, arranged to sense and identify one or more objects to be tracked in the perimeter of the motor vehicle;

a signal controller, coupled to the tracking controller for activating a number of light sources of the plurality of light sources, arranged to project a signal light indicative of said tracked object substantially centered along a virtual line of sight from the driver towards the identified object.

2. A system according to claim 1 , wherein in an optical path between a light source and the windshield, one or more mirrors are provided, said mirrors increasing an optical path distance from the light source to the windshield.

3. A system according to claim 1 , wherein in an optical path between a light source and the windshield, one or more further light sources are provided wherein the control system is programmed to selectively activate one or more of said light sources along said optical path, in function of a distance of the tracked object.

4. A system according to claim 1 , wherein the signal system is programmed to activate said signal light indicative of said tracked object being visible to the driver.

5. A system according to claim 1 , wherein the signal controller is programmed to activate a number of light sources along the contour in function of a distance of said tracked object.

6. A system according to claim 1 , wherein the tracking controller is programmed to calculate, from a movement of a tracked object, a collision probability with the object, and to activate the signal controller to display a signal light based on the calculated probability.

7. A system according to claim 1 , wherein the signal controller is programmed to activate a number of light sources along the contour in sequential order towards said virtual line of sight.

8. A system according to claim 1 , wherein the signal controller further comprises a driver detection device, and the signal controller is programmed to adjust the virtual line of sight depending on a detected drivers position from the driver detection device.

9. A system according to claim 1 , wherein the driver detection device registers the location of the drivers head or eyes relative to the signal light.

10. A system according to claim 1 , wherein the signal controller further comprises a light sensor and is programmed to adjust the brightness level of the light sources to environmental light conditions, based on a sensor signal from the light sensor.

11. A system according to claim 1 , further comprising a projection system that projects a tracked object on side posts of the cabin said projected object substantially centered along a virtual line of sight from the driver towards the identified object.

12. A system according to claim 11 , wherein the side posts are covered with a reflective material, so that a mirror image of the light source is projected at a virtual distance behind the side post.

13. A method for alerting a driver of a driver cabin of a motor vehicle, said method comprising:

providing, in the driver cabin, along a horizontal contour of windshield and side windows, outside a line of sight of the driver, a plurality of light sources arranged in array to project a signal light against the windshield and/or side window, to show a mirror image of the light source in the windshield or side window, visible to the driver;

providing a tracking controller, coupled to at least one object sensor, arranged to identify one or more objects to be tracked in the perimeter of the motor vehicle;

providing a signal controller, coupled to the tracking controller for activating a number of light sources of the plurality of light sources, arranged to project a signal light indicative of said tracked object substantially centered along a virtual line of sight from the driver towards the identified object.

14. A method according to claim 13 , wherein the vehicle is equipped with camera systems at both sides of the vehicle providing a surround view that coverages of the vicinity of the vehicle.