US 12,269,340 B2
Multi-perspective three-dimensional floating image display with polarization multiplexing
Kai-Han Chang, Sterling Heights, MI (US); Manoj Sharma, Troy, MI (US); Thomas A. Seder, Fraser, MI (US); and Joseph F. Szczerba, Grand Blanc, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Jun. 16, 2022, as Appl. No. 17/842,253.
Prior Publication US 2023/0406099 A1, Dec. 21, 2023
Int. Cl. B60K 35/00 (2024.01); G02B 27/28 (2006.01); B60K 35/21 (2024.01); B60K 35/60 (2024.01)
CPC B60K 35/00 (2013.01) [G02B 27/283 (2013.01); B60K 35/211 (2024.01); B60K 35/60 (2024.01); B60K 2360/23 (2024.01); B60K 2360/29 (2024.01); B60K 2360/771 (2024.01); B60Y 2200/11 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for generating a centrally located floating three-dimensional image display for a plurality of passengers positioned within a vehicle, comprising:
a display adapted to project a multiplexed image comprising a plurality of three-dimensional images;
a polarization rotator positioned immediately in front of the display, the polarization rotator selectably actuatable to rotate the polarization of an image projected from the display through the polarization rotator to one of S-polarization and P-polarization;
a reflector unit adapted to reflect S-polarized images to at least one first beam splitter, and further adapted to reflect P-polarized images to at least one second beam splitter, each of the at least one first beam splitter and the at least one second beam splitter individually associated with one of the plurality of passengers, and adapted to receive one of the plurality of images from the display and to reflect the one of the plurality of images to the associated one of the plurality of passengers, wherein, each of the plurality of passengers perceives one of the plurality of three-dimensional images floating at a central location within the vehicle; and
a controller in communication with the display and the polarization rotator, the controller adapted to simultaneously:
actuate the display to alternate between projecting a first image and projecting a second image;
actuate the polarization rotator to alternate the polarization of the image projected from the display between S-polarization and P-polarization; and
synchronize the display and the polarization rotator such that:
when the display is projecting the first image, the polarization rotator rotates the polarization of the first image to S-polarization; and
when the display is projecting the second image, the polarization rotator rotates the polarization of the second image to P-polarization.