Head-up display
A head-up display unit is protected from damage caused by light entering from the outside. The head-up display comprises a display element whose image is projected onto a mirror unit of a vehicle at a critical angle by a deflection unit and is reflected from there in the direction of the eye of a driver overlaid on an image of the surroundings, and a light-sensitive sensor. The sensor detects ambient light that enters from the mirror element into the deflection unit at the critical angle, and the head-up display comprises a control unit at the control input of which a signal of the sensor is present, and whose control output is connected to a parking device for the head-up display.
1. A head-up display comprising:
a display element having an image projected onto a mirror unit of a vehicle;
a deflection unit to project the image at a critical angle, wherein the image is reflected in the direction of an eye of a driver and overlaid on an image of the surroundings;
a light-sensitive sensor, wherein the sensor detects ambient light coming from the mirror unit into the deflection unit at the critical angle;
a control unit having a control input where a signal of the sensor is present, and a control output connected to a parking device;
a light tunnel aligned according to the critical angle, and wherein the sensor is arranged at an end of the tunnel; and
wherein the light tunnel further comprises a plurality of separating walls, which form a plurality of small light tunnels, wherein the cross-section of the diameter of the small light tunnels are small in comparison with their length.
2. The head-up display of claim 1 , wherein the light tunnel further comprises at least one absorbing wall surface, at least one conically-shaped inclined wall surface; and at least one separating wall arranged between the wall surfaces.
3. The head-up display of claim 2 , wherein the at least one separating wall is aligned parallel to at least one absorbing wall surface.
4. The head-up display of claim 1 , wherein the light tunnel is arranged at a housing of the head-up display, wherein the head-up display is proximate to an outlet opening of the deflection unit.
5. The head-up display of claim 1 , wherein the light tunnel has a length that is a multiple of its diameter.
6. The head-up display of claim 1 , wherein the light tunnel is injection-molded into a housing of the head-up display.
7. The head-up display of claim 1 , wherein the light tunnel has a square cross-section.
8. The head-up display of claim 1 , wherein the light tunnel has a rectangular cross-section.
9. The head-up display of claim 1 , wherein the control unit comprises at least one of a delay unit and an integration unit.
10. The head-up display of claim 1 , further comprising a conically shaped wall surface and inclined separating surfaces that are all aligned to the same point of convergence.
11. The head-up display of claim 1 , wherein the light tunnel is formed by a recess in an outer wall of the head-up display.
12. The head-up display of claim 1 , wherein the light tunnel comprises conically shaped, inclined wall surfaces that form a truncated cone with a square cross-section.
13. A head-up display comprising:
a display element having an image projected onto a mirror unit of a vehicle;
a deflection unit to project the image at a critical angle, wherein the image is reflected in the direction of an eye of a driver and overlaid on an image of the surroundings;
a light-sensitive sensor, wherein the sensor detects ambient light coming from the mirror unit into the deflection unit at the critical angle;
a control unit having a control input where a signal of the sensor is present, and a control output connected to a parking device; and
a light tunnel aligned according to the critical angle; and
a conically shaped wall surface and inclined separating surfaces of the light tunnel that are all aligned to the same point of convergence.
14. The head-up display of claim 13 , wherein the sensor is arranged at an end of the tunnel.
15. The head-up display of claim 13 , wherein the light tunnel is arranged at a housing of the head-up display, wherein the head-up display is proximate to an outlet opening of the deflection unit.
16. The head-up display of claim 13 , wherein the light tunnel is injection-molded into a housing of the head-up display.
17. The head-up display of claim 13 , wherein the control unit comprises at least one of a delay unit and an integration unit.
18. A head-up display comprising:
a display element having an image projected onto a mirror unit of a vehicle;
a deflection unit to project the image at a critical angle, wherein the image is reflected in the direction of an eye of a driver and overlaid on an image of the surroundings;
a light-sensitive sensor, wherein the sensor detects ambient light coming from the mirror unit into the deflection unit at the critical angle;
a control unit having a control input where a signal of the sensor is present, and a control output connected to a parking device;
a light tunnel aligned according to the critical angle, and wherein the sensor is arranged at an end of the tunnel; and
wherein the light tunnel comprises conically shaped, inclined wall surfaces that form a truncated cone with a square cross-section.
19. The head-up display of claim 18 , wherein the light tunnel is arranged in a housing of the head-up display, wherein the head-up display is proximate to an outlet opening of the deflection unit.
20. The head-up display of claim 18 , wherein the light tunnel is injection-molded into a housing of the head-up display.
21. The head-up display of claim 18 , wherein the control unit comprises at least one of a delay unit and an integration unit.