US 12,313,848 B2
Reflective exit pupil replicator for HUD system
Kai-Han Chang, Sterling Heights, MI (US); Manoj Sharma, Troy, 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 Jul. 25, 2022, as Appl. No. 17/814,652.
Prior Publication US 2024/0027756 A1, Jan. 25, 2024
Int. Cl. G02B 27/01 (2006.01); B60K 35/00 (2006.01); G02B 17/00 (2006.01); G02B 17/04 (2006.01); G02B 27/14 (2006.01); B60K 35/23 (2024.01)
CPC G02B 27/0101 (2013.01) [B60K 35/00 (2013.01); G02B 17/002 (2013.01); G02B 17/04 (2013.01); G02B 27/14 (2013.01); B60K 35/23 (2024.01); B60K 2360/23 (2024.01); B60K 2360/29 (2024.01)] 20 Claims
OG exemplary drawing
 
1. A head-up display system, comprising:
a projector adapted to project an image;
a primary reflector; and
an exit pupil replicator, having a plurality of lateral reflective surfaces and a plurality of vertical reflective surfaces;
the primary reflector adapted to reflect an image projected by the projector to the exit pupil replicator;
each of the plurality of lateral reflective surfaces adapted to reflect a portion of the image reflected from the primary reflector to the plurality of vertical reflective surfaces and to transmit a portion of the image reflected from the primary reflector to an adjacent one of the plurality of lateral reflective surfaces, a last one of the plurality of lateral reflective surfaces adapted to reflect 100% of the image reflected from the primary reflector to the plurality of vertical reflective surfaces, wherein the plurality of lateral reflective surfaces is adapted to split the projected image reflected from the primary reflector into a one-dimensional array of identical projected images having equal intensity and to reflect the one-dimensional array of identical projected images having equal intensity to the plurality of vertical reflective surfaces; and
the plurality of vertical reflective surfaces adapted to split the one-dimensional array of identical projected images having equal intensity reflected from the plurality of lateral reflective surfaces into a two-dimensional array of identical projected images having equal intensity and to reflect the two-dimensional array of identical projected images having equal intensity upward to a windshield.