Invention Grant
- Patent Title: Image projection device
-
Application No.: US16619437Application Date: 2018-09-12
-
Publication No.: US11428926B2Publication Date: 2022-08-30
- Inventor: Makoto Suzuki , Megumi Yamamoto , Seiji Morino , Chizuru Kaneko
- Applicant: QD LASER, INC.
- Applicant Address: JP Kawasaki
- Assignee: QD LASER, INC.
- Current Assignee: QD LASER, INC.
- Current Assignee Address: JP Kawasaki
- Agency: Kratz, Quintos & Hanson, LLP
- Priority: JPJP2017-189998 20170929
- International Application: PCT/JP2018/033827 WO 20180912
- International Announcement: WO2019/065245 WO 20190404
- Main IPC: G02B26/10
- 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.
Public/Granted literature
- US20210173199A1 IMAGE PROJECTION DEVICE Public/Granted day:2021-06-10
Information query