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公开(公告)号：US20250044579A1
公开(公告)日：2025-02-06
申请号：US18709339
申请日：2022-11-04
Applicant: QD LASER, INC.
Inventor： Makoto SUZUKI , Seiji MORINO
Abstract: An image projection device includes a projection unit converging image light beams emitted in different directions from a scanning unit at a first convergence point in user's eye, a reflection unit converging the image light beams at a second convergence point before the projection unit, an optical member being provided between the projection unit and the reflection unit, converting the image light beams into convergent light beams, and causing the image light beams to enter the projection unit as diffusion light beams a drive unit moving the reflection unit, a detection unit detecting a direction in which user's pupil has moved, and a drive control unit controlling the drive unit to move the reflection unit so that incident positions of the image light beams on the optical member change according to the direction in which the pupil has moved.
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公开(公告)号：US20180373041A1
公开(公告)日：2018-12-27
申请号：US16062424
申请日：2016-11-28
Applicant: QD LASER, INC.
Inventor： Mitsuru SUGAWARA , Makoto SUZUKI , Michio ARAI
Abstract: An image projection device includes: a projection unit that projects an image light beam forming an image onto a pupil of an eyeball of a user to project the image onto a retina of the eyeball; a detection unit that detects a direction in which the pupil has moved relative to a face of the user and a speed of movement of the pupil; and a control unit that performs different controls of the image when the pupil has moved at different speeds in a same direction.
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公开(公告)号：US11764546B2
公开(公告)日：2023-09-19
申请号：US17501497
申请日：2021-10-14
Applicant: DENSO CORPORATION , TOYOTA JIDOSHA KABUSHIKI KAISHA , MIRISE Technologies Corporation , QD LASER, Inc.
Inventor： Yuki Kamata , Hiroyuki Tarumi , Koichi Oyama , Keizo Takemasa , Kenichi Nishi , Yutaka Onishi
CPC classification number: H01S5/341 , H01S3/08036 , H01S5/04256 , H01S5/1096 , H01S5/141 , H01S5/3412 , H01S5/3054 , H01S5/3086
Abstract: The semiconductor laser device includes: an activation layer having at least one first quantum dot layer and at least one second quantum dot layer having a longer emission wavelength than the first quantum dot layer. The gain spectrum of the active layer has the maximum values at the first wavelength and the second wavelength longer than the first wavelength corresponding to the emission wavelength of the first quantum dot layer and the emission wavelength of the second quantum dot layer, respectively. The maximum value of the gain spectrum at the first wavelength is defined as the first maximum value, and the maximum value of the gain spectrum at the second wavelength is defined as the second maximum value. The first maximum value is larger than the second maximum value.
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公开(公告)号：US20230199141A1
公开(公告)日：2023-06-22
申请号：US17926953
申请日：2022-01-12
Applicant: QD LASER, INC.
Inventor： Makoto SUZUKI , Seiji MORINO
CPC classification number: H04N5/7491 , G02B26/101 , G02B26/0833
Abstract: An image projection device incudes a scanning unit that two-dimensionally scans a light beam emitted from a light source, a light guide member that is formed of a glass material through which light beams emitted from the scanning unit at different times pass, has reflection surfaces reflecting the light beams, converges the light beams reflected by the reflection surfaces at a first convergence point in the eye of the user, and then irradiates a retina of the user with the converged light beams, a first optical member that converges the light beams emitted from the scanning unit at a second convergence point before the light guide member and then causes the light beams to enter the light guide member, and a second optical member that is disposed at the second convergence point and causes the light beams to enter a last reflection surface as diffusion lights.
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公开(公告)号：US20230027143A1
公开(公告)日：2023-01-26
申请号：US17860229
申请日：2022-07-08
Applicant: DENSO CORPORATION , TOYOTA JIDOSHA KABUSHIKI KAISHA , MIRISE Technologies Corporation , QD LASER, Inc.
Inventor： YUKI KAMATA , HIROYUKI TARUMI , KOICHI OYAMA , KEIZO TAKEMASA , KENICHI NISHI , YUTAKA OHNISHI
Abstract: An optical semiconductor device includes an active layer having a plurality of quantum dot layers. The plurality of quantum dot layers include: a first quantum dot layer doped with a p-type impurity; and a second quantum dot layer doped with an n-type impurity and having an emission wavelength different from that of the first quantum dot layer.
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Patent Agency Ranking
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
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.
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公开(公告)号：US11019995B2
公开(公告)日：2021-06-01
申请号：US16471274
申请日：2017-12-19
Applicant: QD Laser, Inc.
Inventor： Hironori Miyauchi , Kenji Yasui , Mitsuru Sugawara , Makoto Suzuki
Abstract: A retinal scanning type eye examination device includes a storage unit configured to store test image data; a laser emitting unit including a laser light source configured to generate an imaging laser beam based on the test image data, the laser emitting unit being configured to project a test image onto a retina of an eyeball of a person subjected to an eye examination by using the imaging laser beam; an optical component configured to cause the imaging laser beam to converge at an inside of the eyeball of the person; a parameter acquiring unit configured to acquire parameter information for a retinal scanning type eyewear, the parameter information including angle information indicating a rotation angle of the laser emitting unit when the laser emitting unit is rotated around a converging point of the laser beam; and an output unit configured to output the parameter information to an external device.
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公开(公告)号：US10921598B2
公开(公告)日：2021-02-16
申请号：US16619053
申请日：2018-03-14
Applicant: QD LASER, INC.
Inventor： Makoto Suzuki , Megumi Yamamoto
Abstract: In the first embodiment and the second embodiment, the case where an image is projected on the retina 52 of one of the eyes 50 has been described, but an image may be projected on the retinas 52 of both eyes 50. In addition, the scan mirror 14 has been described as an example of a scan unit, but the scan unit may be any element as long as it can scan a light beam. For example, other components such as potassium tantalate niobate (KTN) crystal that is an electro-optic material may be used as the scan unit. The case where the light beam is a laser beam has been described as an example, but the light beam may be light other than the laser beam.
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公开(公告)号：US10659743B2
公开(公告)日：2020-05-19
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
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.
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公开(公告)号：US10444519B2
公开(公告)日：2019-10-15
申请号：US15579750
申请日：2016-04-26
Applicant: QD LASER, INC. , THE UNIVERSITY OF TOKYO
Inventor： Yasuhiko Arakawa , Mitsuru Sugawara , Makoto Suzuki , Michio Arai
IPC: G02B26/08 , G02B27/02 , G02B27/09 , G02B17/06 , G09G5/00 , G09G3/00 , G09G3/34 , H04N5/74 , G02B27/01 , G02B27/00 , G02B26/10
Abstract: An image projection device includes: one light source unit emitting an image light beam, which forms an image, of visible light and a checking light beam of visible light; an optical system projecting the image light beam emitted from emitted from the one light source unit onto a first surface region of an eye of a user to project the image light beam onto a retina of the user, and projecting the checking light beam emitted from the one light source unit onto a second surface region, which is distant from the first surface region, of the eye of the user; a light detector detecting a reflected light that is the checking light beam reflected by the eye of the user; and a controller controlling at least one of the one light source unit and the optical stem based on a detection result of the reflected light by the light detector.
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