US 12,257,901 B2
Method and device for operating a windshield display system with a covered display detection, and windshield display system
Tomas Hejda, Neufahrn (DE); Sadzida Kratz, Munich (DE); and Christopher Rölle, Groebenzell (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 18/286,425
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Apr. 4, 2022, PCT No. PCT/EP2022/058904
§ 371(c)(1), (2) Date Oct. 11, 2023,
PCT Pub. No. WO2022/238050, PCT Pub. Date Nov. 17, 2022.
Claims priority of application No. 10 2021 112 097.7 (DE), filed on May 10, 2021.
Prior Publication US 2024/0198801 A1, Jun. 20, 2024
Int. Cl. B60K 35/28 (2024.01); G01S 15/04 (2006.01); G06V 20/59 (2022.01)
CPC B60K 35/28 (2024.01) [G01S 15/04 (2013.01); G06V 20/59 (2022.01); B60K 2360/143 (2024.01); B60K 2360/23 (2024.01); B60K 2360/332 (2024.01); B60K 2360/785 (2024.01)] 14 Claims
OG exemplary drawing
 
1. A reflection display system for displaying a display image for a vehicle occupant of a motor vehicle by reflection of the display image on a windshield, comprising:
a display unit configured to output the display image via a display surface of the display unit, wherein the display unit is arranged, in a depression, on an upper side of a dashboard such that a reflection of the display image is perceptible via the windshield in an eye region of a vehicle occupant,
a detection sensor configured to detect a foreign object that is present on the display surface; and
a control unit configured to signal a disturbance of the display of the display image upon detection of the foreign object on the display surface;
wherein the detection sensor includes a light barrier sensor having at least one light source for outputting nonvisible light and having at least one photodetector, wherein the light barrier sensor is configured to detect the presence of the foreign object by establishing an interruption of one or more light beams guided along the surface of the display surface of the display unit; and
wherein the light beams guided along the surface are aligned such that they are reflected at one or more reflection points on the display surface.