US 12,105,291 B2
Projection device for smart glasses, method for representing image information, using a projection device, and control unit
Andreas Petersen, Eningen (DE); Gael Pilard, Wankheim (DE); and Hendrik Specht, Pliezhausen (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 17/796,185
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Feb. 4, 2021, PCT No. PCT/EP2021/052603
§ 371(c)(1), (2) Date Jul. 28, 2022,
PCT Pub. No. WO2021/185509, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 10 2020 203 638.1 (DE), filed on Mar. 20, 2020.
Prior Publication US 2023/0071805 A1, Mar. 9, 2023
Int. Cl. G02B 27/01 (2006.01); G02B 26/10 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 26/101 (2013.01); G02B 2027/0112 (2013.01); G02B 2027/0123 (2013.01); G02B 2027/0178 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A projection device for smart glasses, comprising:
an image generating unit configured to generate at least one first light beam representing image information; and
at least one deflecting element configured to deflect the first light beam in the form of a second light beam representing first image information, and to deflect the first light beam in the form of a third light beam representing second image information, into a first field of vision of an eye and/or a second field of vision of the eye;
wherein the second light beam and the third light beam differ from one another with regard to a beam divergence,
wherein the second field of vision and the first field of vision at least overlapping, and
wherein the deflecting element includes a first hologram layer to deflect the first light beam in the form of the second light beam representing the first image information, and to deflect the first light beam in the form of the third light beam representing the second image information, into the first field of vision of the eye and/or the second field of vision of the eye.