US 12,202,336 B2
Head-up display system having a holographic panel comprising a first layer and a second layer
Kai-Han Chang, Madison Heights, MI (US); and Thomas A. Seder, Fraser, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Mar. 22, 2022, as Appl. No. 17/700,916.
Prior Publication US 2023/0302899 A1, Sep. 28, 2023
Int. Cl. B60K 35/00 (2024.01); B60K 35/22 (2024.01); B60K 35/23 (2024.01); B60K 35/60 (2024.01)
CPC B60K 35/00 (2013.01) [B60K 35/22 (2024.01); B60K 35/23 (2024.01); B60K 35/60 (2024.01); B60K 2360/1526 (2024.01); B60K 2360/29 (2024.01); B60K 2360/333 (2024.01); B60K 2360/785 (2024.01); B60Y 2200/11 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A head-up display system of a vehicle for visually transmitting information to eyes of a first occupant and eyes of a second occupant, comprising:
an illumination device configured to emit a first display light having a first polarization and a second display light having a second polarization;
a windshield spaced from the illumination device and extending transverse to the first and second display lights; and
a holographic panel coupled to and extending with the windshield and comprising a first layer and a second layer;
wherein the first and second display lights emit toward the holographic panel in an entrance direction at an entrance angle relative to an axis normal to the holographic panel;
wherein the first layer is arranged to diffract the first display light having the first polarization in a first exit direction at a first exit angle relative to the axis toward the eyes of the first occupant; and
wherein the second layer is arranged to diffract the second display light having the second polarization in a second exit direction at a second exit angle relative to the axis, and different than the first exit angle, toward the eyes of the second occupant.