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公开(公告)号：US11307426B2
公开(公告)日：2022-04-19
申请号：US17116984
申请日：2020-12-09
Inventor： Susumu Uragami , Hiroyuki Furuya , Akira Kurozuka , Yuta Yamamoto , Mitsutaka Yamaguchi , Yoshiro Kashiwabara
Abstract: An image display apparatus includes: a light source; a screen on which an image is formed when light from the light source is applied thereto; an optical system configured to generate a virtual image by light from the screen; an actuator configured to move the screen in an optical axis direction; a support base supporting the actuator; and a dynamic damper installed on a non-movable part on the support base.
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公开(公告)号：US10819963B2
公开(公告)日：2020-10-27
申请号：US16542302
申请日：2019-08-16
Inventor： Yoshiteru Mino , Kosuke Kubota , Masahito Ogata , Yuta Yamamoto
Abstract: A display device has a movable screen that is movable in a movement direction, a drive controller, a projector, and a position detector. The drive controller moves the movable screen relative to a reference position set at a prescribed position in a movement range of the movable screen. The projector performs drawing on the movable screen by irradiating the movable screen with light used for scanning the movable screen and projects a virtual image onto a target space based on light that passes through the movable screen. The position detector executes position detection processing for detecting that the movable screen is located at a detection position set in relation to the prescribed position. The position detector moves the movable screen and executes the position detection processing in a non-display period in which the movable screen is not irradiated with light from the projector.
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公开(公告)号：US10514540B2
公开(公告)日：2019-12-24
申请号：US16013981
申请日：2018-06-21
Inventor： Akira Kurozuka , Yuta Yamamoto , Susumu Uragami , Hiroyuki Furuya
IPC: H01S5/068 , G02B27/01 , G03B21/20 , G02B27/14 , B60K35/00 , G02B27/30 , H01S5/0683 , H04N9/31 , H01S5/06
Abstract: The disclosure provides a light source device and an image display device. The light source device includes a laser light source configured to emit laser light having a wavelength in a range from 635 nm to 645 nm inclusive, a temperature sensor configured to detect temperature around the light source device, and a laser control circuit configured to control the laser light source. The laser control circuit approximates, with use of a quartic expression, change in threshold current of the laser light source relative to temperature, and approximates, with use of a quadratic expression, change in slope efficiency of the laser light source relative to temperature, to obtain threshold current and slope efficiency of the laser light source corresponding to detection temperature of the temperature sensor, and controls the laser light source in accordance with the threshold current and the slope efficiency thus obtained.
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公开(公告)号：US10432899B2
公开(公告)日：2019-10-01
申请号：US16001469
申请日：2018-06-06
Inventor： Hiroyuki Furuya , Akira Kurozuka , Yuta Yamamoto , Susumu Uragami
IPC: H04N9/31 , G09G3/02 , B60K35/00 , G02B27/01 , G09G3/00 , G03B21/602 , G03B21/625
Abstract: Provided is an image display device capable of effectively enhancing image quality of a display image with a simple configuration. The image display device includes a light source, a screen configured to be two-dimensionally scanned with laser light to draw an image on the screen, a scanning unit configured to scan the screen with the laser light, a mirror drive circuit configured to drive the scanning unit, and an optical system configured to generate a virtual image of the image drawn on the screen. On the screen, a plurality of lens regions are arranged so as to individually line up in two directions different from each other. Rows of the lens regions in one of the two directions are inclined relatively at a predetermined inclination angle with respect to main scan directions of the laser light to the screen.
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公开(公告)号：US20210088797A1
公开(公告)日：2021-03-25
申请号：US17116984
申请日：2020-12-09
Inventor： Susumu Uragami , Hiroyuki Furuya , Akira Kurozuka , Yuta Yamamoto , Mitsutaka Yamaguchi , Yoshiro Kashiwabara
IPC: G02B27/01
Abstract: An image display apparatus includes: a light source; a screen on which an image is formed when light from the light source is applied thereto; an optical system configured to generate a virtual image by light from the screen; an actuator configured to move the screen in an optical axis direction; a support base supporting the actuator; and a dynamic damper installed on a non-movable part on the support base.
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Patent Agency Ranking
公开(公告)号：US20210082326A1
公开(公告)日：2021-03-18
申请号：US17103771
申请日：2020-11-24
Inventor： Susumu Uragami , Yuta Yamamoto , Hiroyuki Furuya , Yoshiro Kashiwabara
Abstract: An image display device includes: a light source; a screen on which an image is formed when light from the light source is applied thereto; an optical system configured to generate a virtual image by light from the screen; an actuator configured to move the screen in an optical axis direction; a position detector configured to detect a movement position of the screen; a servo circuit configured to cause the movement of the screen by the actuator to follow a target waveform on the basis of a signal from the position detector; and a correction circuit configured to reduce a deviation between a timing to move the screen by the servo circuit and a timing to form the image on the screen.
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公开(公告)号：US10444501B2
公开(公告)日：2019-10-15
申请号：US16002012
申请日：2018-06-07
Inventor： Hiroyuki Furuya , Akira Kurozuka , Yuta Yamamoto , Susumu Uragami
Abstract: The image display device further includes a scanning unit that uses light from the light source to scan the movable screen and the fixed screen, and an optical system that uses light from the movable screen and the fixed screen to generate a virtual image, a drive unit that moves the movable screen, a structure body that supports the fixed screen at a fixed position such that the fixed screen is closer to the optical system than the movable screen is, and a magnetic cover that covers a movable part of the drive unit. The structure body covers an area around an opening of the magnetic cover to shield the movable part of the drive unit from stray light travelling backward via the optical system.
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公开(公告)号：US10409063B2
公开(公告)日：2019-09-10
申请号：US15880783
申请日：2018-01-26
Inventor： Susumu Uragami , Hiroyuki Furuya , Akira Kurozuka , Yuta Yamamoto
Abstract: An image display device includes a light source, a screen, a scanning unit, an optical system, a drive unit, a support base, and a fixed base. The screen is irradiated with light from the light source, and an image is thus formed on the screen. The scanning unit scans the light from the light source along multiple scanning lines on the screen. The optical system forms a virtual image using the light from the screen. The drive unit moves the screen in an optical axis direction. The support base supports the drive unit. The fixed base supports the support base via a damper. The support base is supported by the fixed base such that the support base has support rigidity higher in a first direction in which a visual distance of a display image is changed in association with the movement of the screen than in directions other than the first direction.
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公开(公告)号：US10261317B2
公开(公告)日：2019-04-16
申请号：US15991708
申请日：2018-05-29
Inventor： Hiroyuki Furuya , Akira Kurozuka , Yuta Yamamoto , Susumu Uragami
Abstract: The image display device includes a light source, screens on which images are formed by being irradiated with light from the light source, a scanning unit that scans the screens by using the light from the light source, an optical system that generates a virtual image by using light from the screens, and a drive unit that includes a holder for integrally supporting the screens and moves the screens together with the holder The screens are aligned in a direction perpendicular to a movement direction of the holder caused by the drive unit, and are installed at positions that are shifted from each other by a certain distance in the movement direction.
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公开(公告)号：US11322057B2
公开(公告)日：2022-05-03
申请号：US17103771
申请日：2020-11-24
Inventor： Susumu Uragami , Yuta Yamamoto , Hiroyuki Furuya , Yoshiro Kashiwabara
Abstract: An image display device includes: a light source; a screen on which an image is formed when light from the light source is applied thereto; an optical system configured to generate a virtual image by light from the screen; an actuator configured to move the screen in an optical axis direction; a position detector configured to detect a movement position of the screen; a servo circuit configured to cause the movement of the screen by the actuator to follow a target waveform on the basis of a signal from the position detector; and a correction circuit configured to reduce a deviation between a timing to move the screen by the servo circuit and a timing to form the image on the screen.
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