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1.发明授权公开(公告)号：US12066544B2
公开(公告)日：2024-08-20
申请号：US17091029
申请日：2020-11-06
发明人： Seiji Inaba , Katsumi Ito
IPC分类号： G01S17/894 , G01S17/08
CPC分类号： G01S17/894 , G01S17/08
摘要： At a preparatory step for correction, in a state that a reflective tape made with a retroreflective material is pasted in advance onto a floor surface of a measurement space in a direction away from the distance-measuring device, a distance La to an inside area of the reflective tape, and a distance Lb to an outside area of the reflective tape adjacent to the inside area are measured by the distance-measuring device, while measurement positions Y are being scanned along the reflective tape. A correction formula for converting the distance Lb to the distance La is created from a relationship between the distance La and the distance Lb obtained at each measurement position Y. At an actual measurement step, a distance (actual measurement value x) to the target object measured by the distance-measuring device is corrected in accordance with the correction formula, and a measurement-distance corrected value y is calculated.
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2.发明公开公开(公告)号：US20240159902A1
公开(公告)日：2024-05-16
申请号：US18378466
申请日：2023-10-10
发明人： Katsumi ITO , Hisataka SUGIYAMA , Katsuhiko IZUMI
IPC分类号： G01S17/10 , G01S7/4861 , G01S7/497
CPC分类号： G01S17/10 , G01S7/4861 , G01S7/497
摘要： A distance measurement device comprises an irradiation unit that irradiates a measurement light onto an object to be measured, a light receiving sensor that receives reflected light from the object to detect an exposure amount based on the reflected light, a memory unit that stores correction information indicating a correction formula set including a plurality of correction formulas and an applicable distance range of each correction formula, and a distance calculation unit that calculates the measurement distance to the object to be measured based on the exposure amount. The distance calculation unit performs, based on the correction information stored in the memory unit, a distance correction calculation to calculate a corrected measured distance by correcting the measured distance using the correction formula corresponding to the applicable distance range in which the measured distance is included among the plurality of correction formulas in the correction formula set.
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公开(公告)号：US20240151970A1
公开(公告)日：2024-05-09
申请号：US18039309
申请日：2021-12-27
发明人： Toshiteru NAKAMURA , Takuma KUNO , Takahiro MOURI
IPC分类号： G02B27/01
CPC分类号： G02B27/017 , G02B2027/0178
摘要： A head mounted display displays an image in the user's field of vision and includes a video display unit that generates the image to be displayed. A first waveguide and a second waveguide duplicate the video light from the video display unit. Each of the waveguides includes a pair of parallel main planes that confine video light by internal reflection. The first waveguide includes an incident surface that reflects video light into the inside and two or more outgoing reflective surfaces emit video light into the second waveguide. The second waveguide includes an input unit that couples video light from the first waveguide to the inside and an output unit that emits video light to the user's pupil, wherein the angle between the duplication direction of video light in the first waveguide and the duplication direction of video light in the second waveguide is less than 90°.
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公开(公告)号：US20230400691A1
公开(公告)日：2023-12-14
申请号：US18033386
申请日：2021-11-17
发明人： Hiroyuki MINEMURA
IPC分类号： G02B27/01
CPC分类号： G02B27/0172 , G02B2027/0118
摘要： A light guiding plate comprising: a substrate; an incidence diffraction grating for diffracting incident light; and an emission diffraction grating for emitting, from the substrate, light diffracted by the incidence diffraction grating. The emission diffraction grating has a mesh-like grating pattern formed on the substrate. The mesh-like grating pattern is formed from a first parallel straight line group and a second parallel straight line group intersecting the first parallel straight line group. The pitch of the first parallel straight line group and the pitch of the second parallel straight line group are equal. Between the incidence diffraction grating and the mesh-like grating pattern, a line region is provided that consists only of the first parallel straight line group or the second parallel straight line group.
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公开(公告)号：US11789122B2
公开(公告)日：2023-10-17
申请号：US17075832
申请日：2020-10-21
发明人： Naoya Matsuura , Norimoto Ichikawa
IPC分类号： G01S7/48 , G01S7/487 , G01S7/4865 , G01S7/497
CPC分类号： G01S7/4808 , G01S7/487 , G01S7/4865 , G01S7/4972
摘要： The present invention provides an omnidirectional distance measuring device that covers a wide detection range and does not require adjustment of each of the detection areas of a plurality of distance measuring sensors. In the omnidirectional distance measuring device, a plurality of distance measuring sensors that measure a distance to a target are disposed radially around a central axis so as to be close to each other. The plurality of distance measuring sensors are integrally configured such that a detection center direction of each of the plurality of distance measuring sensors is inclined by a predetermined angle from a plane perpendicular to the central axis. As the distance measuring sensor, a TOF sensor that measures a distance based on a flight time of light or a stereo camera that measures a distance using parallax of a pair of cameras is used.
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6.发明公开公开(公告)号：US20230143535A1
公开(公告)日：2023-05-11
申请号：US17895103
申请日：2022-08-25
发明人： Kozo MASUDA
CPC分类号： H02J50/80 , H02J50/10 , H02J7/00036 , H02J7/007194 , H02J7/0049
摘要： A wireless charging device includes a power transmitting coil that performs power transmission to a power receiving device including a power receiving coil by wireless power transmission. A power transmitting control unit is configured to acquire a temperature of a secondary battery of a charging target that is transmitted from the power receiving device through a communication unit that receives data from the power receiving device and perform quick charging with first transmission power until the temperature of the secondary battery reaches an upper limit temperature, and perform weak charging with transmission power that is lower than transmission power for maintaining the temperature of the secondary battery not to be higher than the upper limit temperature and is lower than the first transmission power of which a charging state is uninterrupted when the temperature of the secondary battery reaches the upper limit temperature.
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公开(公告)号：US20230057554A1
公开(公告)日：2023-02-23
申请号：US17863534
申请日：2022-07-13
发明人： Tsukasa TAKAHASHI , Katsuhiko IZUMI
IPC分类号： G01S17/894 , G01J5/00
摘要： A distance measurement system according to the invention includes a processor, a distance measurement device, and a heat detection device. In the distance measurement system, the distance measurement device can measure a distance to a subject and can generate a distance image related to the subject whose distance has been measured. The heat detection device can measure the temperature of the subject and can generate a temperature image related to the subject whose temperature has been measured. The processor can associate the distance image and the temperature image acquired from the same point of view and determine whether or not the subject is an object on the basis of a distance value and a temperature value at the same position in the images.
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公开(公告)号：US20230028757A1
公开(公告)日：2023-01-26
申请号：US17785102
申请日：2020-10-08
发明人： Hiroyuki MINEMURA , Yumiko ANZAI
摘要： To improve brightness of image information visually recognized by a user while using plastic for a light guide plate. An image display element includes: a substrate made of resin; an incident diffraction grating that diffracts incident light; and an exit diffraction grating that emits the light, the incident diffraction grating being formed on a first surface of the substrate, the exit diffraction grating being formed on a second surface on a side opposite to the first surface of the substrate, and the exit diffraction grating being formed on one surface.
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公开(公告)号：US20230010994A1
公开(公告)日：2023-01-12
申请号：US17782692
申请日：2020-10-08
发明人： Hiroyuki MINEMURA , Yumiko ANZAI
摘要： To improve luminance of image information visually recognized by a user while using plastic for a light guide plate. An image display element includes: a plastic substrate; an incident diffraction grating integrally formed on a surface of the plastic substrate and configured to diffract incident video light; an emission diffraction grating integrally formed on a surface of the plastic substrate and configured to emit the video light; and a coating layer formed on the emission diffraction grating and having a thickness of 10 nm or more and 1000 nm or less and a refractive index of 1.64 or more and 2.42 or less.
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公开(公告)号：US20220413204A1
公开(公告)日：2022-12-29
申请号：US17764623
申请日：2020-10-06
发明人： Ryuji UKAI , Takahiro MOURI , Takeru UTSUGI , Toshiteru NAKAMURA , Takuma KUNO , Masahito UCHIYAMA
摘要： According to the invention, a light guide plate-type video display device and a video display system that are capable of displaying a video with less color deviation and less video distortion are provided. A video display device 101 configured to display a video includes a video projection unit 200 configured to project video light, a video deflection unit 210, and a light guide portion 230. The video deflection unit 210 deflects video light emitted by the video projection unit 200 and causes the video light to propagate to the light guide portion 230, and the light guide portion 230 causes the entered video light to propagate therein and outputs the video light. Here, the video deflection unit 210 or the light guide portion 230 is configured to reduce color dispersion of the video light outputted from the light guide portion 230.
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