公开(公告)号：US20210149110A1

公开(公告)日：2021-05-20

申请号：US17159476

申请日：2021-01-27

申请人： University of Fukui

发明人： Toshio Katsuyama ,  Shoji Yamada

IPC分类号： G02B6/12 ,  G02B26/10 ,  G02B26/08 ,  G03B21/20 ,  G02B6/125

摘要： The invention relates to an optical waveguide-type optical multiplexer, an optical waveguide-type multiplexing light source device and an image projection device, where the intensity of a light beam emitted from a light source is attenuated to a desired value without installing an additional optical attenuator element. One of a plurality of optical waveguides on the light emission side for emitting light distributed/multiplexed in an optical multiplexer unit excluding an optical waveguide on the light emission side in which the greatest output light power can be gained for each wavelength from among the optical waveguides on the light emission side in the case where a plurality of light sources is driven is used as an optical waveguide for light emission.

公开(公告)号：US20200033590A1

公开(公告)日：2020-01-30

申请号：US16589661

申请日：2019-10-01

申请人： University of Fukui

发明人： Toshio Katsuyama ,  Shoji Yamada

IPC分类号： G02B26/10 ,  G02B27/01 ,  G02B26/12

摘要： This invention is provided with: a light source; a light scanning mirror; a measurement mechanism for measuring a change in the intensity of light reflected from an eyeball as time elapses through the scanning of at least a surface of the pupil with a light beam by means of the light scanning mirror; a sampling mechanism for sampling the intensity of light reflected from the pupil from the measured change in the intensity of the reflected light as time elapses; and a mechanism for detecting the size and the position of the pupil by synchronizing the sampled intensity of light reflected from the pupil, and the scanning time during which the surface of the eyeball is scanned; and an image generating mechanism for forming an image on the retina of the eyeball by projecting a light beam for generating an image onto the pupil in the detected position while scanning.

公开(公告)号：US20210149111A1

公开(公告)日：2021-05-20

申请号：US17159643

申请日：2021-01-27

申请人： University of Fukui

发明人： Toshio Katsuyama ,  Shoji Yamada

IPC分类号： G02B6/12 ,  G02B26/10 ,  G02B26/08 ,  G02B6/125 ,  G03B21/20

摘要： The invention relates to an optical multiplexer, a light source module, a two-dimensional optical scanning device and an image projection device, where the effects of stray light that has failed to enter into an input optical waveguide can be reduced. Light that is in or below the range of 2.5 times greater than the full width at half maximum of the light intensity distribution of a light beam that has not been inputted into an optical waveguide from among the respective light beams that have been inputted into the input ends of the plurality of input optical waveguides is prevented from overlapping with the multiplexed light outputted from the output optical waveguide in the output end of the output optical waveguide.

公开(公告)号：US11307405B2

公开(公告)日：2022-04-19

申请号：US16589661

申请日：2019-10-01

申请人： University of Fukui

发明人： Toshio Katsuyama ,  Shoji Yamada

IPC分类号： G02B26/10 ,  G02B26/12 ,  G02B27/01

摘要： This invention is provided with: a light source; a light scanning mirror; a measurement mechanism for measuring a change in the intensity of light reflected from an eyeball as time elapses through the scanning of at least a surface of the pupil with a light beam by means of the light scanning mirror; a sampling mechanism for sampling the intensity of light reflected from the pupil from the measured change in the intensity of the reflected light as time elapses; and a mechanism for detecting the size and the position of the pupil by synchronizing the sampled intensity of light reflected from the pupil, and the scanning time during which the surface of the eyeball is scanned; and an image generating mechanism for forming an image on the retina of the eyeball by projecting a light beam for generating an image onto the pupil in the detected position while scanning.

公开(公告)号：US20220021854A1

公开(公告)日：2022-01-20

申请号：US17469082

申请日：2021-09-08

申请人： University of Fukui

发明人： Toshio Katsuyama ,  Shoji Yamada ,  Akira Nakao

IPC分类号： H04N9/31 ,  F21V5/04

摘要： Provided is a light beam emission device and a light beam projection device, that are downsizable, have a simple configuration, and simplify complicated processing of video signals, such as the timing adjustment of video output signals, without generating color irregularity. The devices include: a plurality of light sources; and a condensing member. A range in the light source array direction, in which emission spots of the light beams emitted from the plurality of light sources respectively exist, is within a size in the array direction of a light beam, immediately after the light beam emitted from an emission spot located most closely to the center of the plurality of light sources, with respect to the condensing member, passed through the condensing member.

公开(公告)号：US20210400244A1

公开(公告)日：2021-12-23

申请号：US17464118

申请日：2021-09-01

申请人： University of Fukui

发明人： Toshio Katsuyama ,  Shoji Yamada ,  Akira Nakao

IPC分类号： H04N9/31 ,  G02B6/12 ,  G02B26/10

摘要： The present invention relates to an optical scanning type video projection device that decreases the height of the optical scanning type video projection device by improving the disposition of a light source module device and an optical scanning mirror device. The optical scanning type video projection device has: a first substrate on which an optical waveguide type multiplexer having a plurality of optical waveguides and a light multiplexer is provided; a second substrate on which an optical scanning mirror device having a movable mirror is provided; and an optical member configured to guide a light beam emitted from the optical waveguide type multiplexer to the movable mirror in a direction that is different from an emitting direction of the light beam. The first substrate and the second substrate are disposed in parallel with each other.

公开(公告)号：US20210152794A1

公开(公告)日：2021-05-20

申请号：US17159661

申请日：2021-01-27

申请人： University of Fukui

发明人： Shoji Yamada ,  Toshio Katsuyama

IPC分类号： H04N9/31

摘要： The invention relates to an optical multiplexer, a light source module, a two-dimensional optical scanning device and an image projection device, where the light beam intensity from a plurality of light sources can be attenuated to a desired value without installing an additional optical attenuator element. The optical coupling ratio of an optical coupling part provided in an optical multiplexing unit is set in such a manner that the total intensity of light beams that have been inputted into individual input optical waveguides from the light sources is attenuated by a value in a range from 5 dB to 40 dB at a stage of being outputted as multiplexed light from an output optical waveguide.

公开(公告)号：US11188149B2

公开(公告)日：2021-11-30

申请号：US16961827

申请日：2019-01-25

申请人： UNIVERSITY OF FUKUI

发明人： Shoji Yamada ,  Toshio Katsuyama

IPC分类号： G06F3/01 ,  G02B26/10 ,  G02B27/01 ,  G02B30/22

摘要： When a predetermined image is displayed for a user such that the user is able to visually recognize the image, the user sight line direction is detected, a part assumed to be present in the detected user sight line direction is set to a first image, an image complementary to the first image for the predetermined image is set to a second image, the positions of the retinas of the eyes of the user are scanned with laser light from a retinal scanning display unit fitted to the head of the user and the first image is focused on a position away from the position of the eyes of the user by a first distance and is displayed. The second image is displayed on the surface of the panel of a panel display unit in a position away from the user by a second distance shorter than the first.