公开(公告)号：US20180184059A1

公开(公告)日：2018-06-28

申请号：US15579759

申请日：2016-04-26

Applicant: QD LASER, INC. ,  THE UNIVERSITY OF TOKYO

Inventor： Yasuhiko ARAKAWA ,  Mitsuru SUGAWARA ,  Makoto SUZUKI ,  Shuichi TOJO

IPC: H04N9/31 ,  G02B26/08 ,  G02B27/01 ,  G02B27/10

CPC classification number: H04N9/3194 ,  G02B26/0833 ,  G02B26/101 ,  G02B27/0172 ,  G02B27/108 ,  G02B2027/0178 ,  H04N9/312 ,  H04N9/3135

Abstract: An image projection device includes: a first mirror oscillating to scan an image light beam forming an image projected onto a retina of a user; a light source emitting the image light beam and a detection light beam to the first mirror at different timings; a second mirror having a first region reflecting-the image light beam reflected by the first mirror to the retina and a second region reflecting the detection light beam reflected by the first mirror in a direction different from a direction in which the image light beam is reflected, and scanning neither the image light beam nor the detection light beam reflected by the first mirror; a detector detecting the detection light beam reflected by the second region; and a controller adjusting oscillation of the first mirror and an emission timing of the image light beam based on a detection result by the detector.