公开(公告)号：US11428926B2

公开(公告)日：2022-08-30

申请号：US16619437

申请日：2018-09-12

Applicant: QD LASER, INC.

Inventor： Makoto Suzuki ,  Megumi Yamamoto ,  Seiji Morino ,  Chizuru Kaneko

IPC: G02B26/10 ,  A61B3/00 ,  A61B3/024 ,  A61B3/032 ,  G02B27/42 ,  H04N9/31

Abstract: An image projection device includes: a light source that emits a laser beam; a control unit that generates an image light beam, and controls emission of the image light beam; a scan unit that scans the image light beam to convert it into scan light; a first light converging unit that is disposed before a user's eye, converges the scan light at a first convergence point near a pupil, and then irradiates the retina with the scan light to project the image on the retina; and a second light converging unit that converges the scan light at a second convergence point before the first light converging unit, and then irradiates the first light converging unit with the scan light; wherein a scan angle of the scan light is substantially the same size as a convergence angle at which the scan light converges to the first convergence point.