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公开(公告)号：US09921312B2
公开(公告)日：2018-03-20
申请号：US14708577
申请日：2015-05-11
Inventor： Haruka Takano
CPC classification number: G01S17/89 , G01S7/4813 , G01S7/484 , G01S7/487
Abstract: In a ranging system using a TOF method, an unwanted reflected light component included in reflected light is reduced or removed. A light source unit emits light at the timing indicated by a light emission control signal and can adjust for each of at least two irradiation regions the amount of light to be emitted. A light receiving unit is exposed to light from a region including a target object and produces three-dimensional information from the total exposure amount. An image processing unit generates a distance image based on the three-dimensional information received from the light receiving unit. The light source unit emits light according to a radiation pattern indicated by a region light amount signal. The radiation pattern is setting of the amount of light to be emitted to each irradiation region.
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公开(公告)号：US10545239B2
公开(公告)日：2020-01-28
申请号：US15882493
申请日：2018-01-29
Inventor： Masaya Kishimoto , Haruka Takano
Abstract: A distance-measuring imaging device includes: a drive controller that outputs a light emission signal and an exposure signal; a light source; a solid-state imager that performs exposure to reflected light; and a TOF calculator that calculates a distance to an object using an imaging signal. The drive controller: cyclically outputs a first exposure signal group in which, before an exposure period of one exposure signal ends, an exposure period of at least one other exposure signal starts; and outputs a second exposure signal group having a dead zone period during which all exposure signals are in a non-exposure period. The TOF calculator calculates a first distance value using a first imaging signal obtained according to the first exposure signal group, calculates a second distance value using a second imaging signal obtained according to the second exposure signal group, and calculates the distance based on the first and second distance values.
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公开(公告)号：US10903254B2
公开(公告)日：2021-01-26
申请号：US15801111
申请日：2017-11-01
Inventor： Mitsuhiko Otani , Junichi Matsuo , Haruka Takano
IPC: G01C3/08 , H01L27/146 , G01S17/10 , G01S17/89 , H04N5/341 , G01S7/487 , G01C3/06 , G01S7/4863 , H01L31/101 , H04N5/335
Abstract: A distance-measuring imaging device includes a light source that applies light according to timing of a light emission signal; a solid-state imager that performs, for an object, exposure according to timing of an exposure signal, and generates raw data corresponding to an exposure amount of the exposure; a signal amount comparator that determines a magnitude relationship in signal amount in the raw data; and a distance calculator that generates and outputs a distance signal based on a determination result. The solid-state imager accumulates, in each of different signal accumulation regions for accumulating signals detected in a same pixel, a signal by exposure in an exposure period that differs in exposure signal timing. The signal amount comparator determines the magnitude relationship between the signals accumulated in the signal accumulation regions. The distance calculator calculates the distance to the object using an arithmetic expression selected depending on the determination result.
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公开(公告)号：US10422859B2
公开(公告)日：2019-09-24
申请号：US14977579
申请日：2015-12-21
Inventor： Makoto Kawamura , Tomohito Nagata , Haruka Takano , Mitsuhiko Otani
Abstract: In a distance measuring device, a drive controller generates an emission timing signal and an exposure timing signal in accordance with a measurement condition. A light source irradiates light in response to the emission timing signal. A solid-state image sensor has a group of pixels arranged in a matrix pattern and divided into a plurality of regions on a line-by-line basis, and performs an exposure process on a selected one of the regions in response to the exposure timing signal. An imaging signal processor obtains distance information by performing an arithmetic operation on a signal output from the solid-state image sensor. The drive controller generates mutually different measurement conditions to the plurality of the regions of the solid-state image sensor.
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Patent Agency Ranking
公开(公告)号：US10073164B2
公开(公告)日：2018-09-11
申请号：US14965901
申请日：2015-12-11
Inventor： Mitsuhiko Otani , Toshiya Fujii , Junji Tokumoto , Haruka Takano
CPC classification number: G01S7/4808 , G01C3/08 , G01S7/4868 , G01S17/10 , G01S17/89 , H01L27/14843
Abstract: A distance-measuring/imaging apparatus having a high S/N and a high distance measurement accuracy is provided. The distance-measuring/imaging apparatus includes: a signal generation unit for generating an emission signal and exposure signal; a light source unit for performing light irradiation by receiving the emission signal; an imaging unit for performing exposure by receiving the exposure signal and for acquiring the exposure amount of the reflected light; and a calculation unit for calculating and outputting the distance information on the basis of the exposure amount. The imaging unit acquires a first exposure amount corresponding to the exposure in a first emission/exposure period, in which the exposure is performed by receiving the exposure signal simultaneously with a receiving timing of the emission signal. The imaging unit acquires a second exposure amount corresponding to the exposure in a second emission/exposure period, in which the exposure is performed by receiving the exposure signal after a lapse of a delay time from the receiving timing of the emission signal. The calculation unit calculates the distance information on the basis of the first exposure amount and second exposure amount that are acquired by changing the repeat count of the emission signal in the first emission/exposure period.
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公开(公告)号：US10686994B2
公开(公告)日：2020-06-16
申请号：US15946270
申请日：2018-04-05
Inventor： Masaya Kishimoto , Haruka Takano , Junichi Matsuo
Abstract: An imaging device includes: a light source that applies light at a timing according to a light emission control signal; a light receiver that performs exposure to reflected light from an object at different timings according to an exposure control signal, and outputs exposure signals generated as a result of the exposure; a calculator that calculates a distance to the object; and a controller that outputs the light emission control signal and the exposure control signal for any of: modulating a length of a light emission period and an exposure period by increasing or decreasing the number of pulses of each of the light emission control signal and the exposure control signal; and modulating a repetition sequence of the light emission period and the exposure period while maintaining a phase relationship between the light emission control signal and the exposure control signal, randomly or in conformity with a specific rule.
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公开(公告)号：US10048356B2
公开(公告)日：2018-08-14
申请号：US14965520
申请日：2015-12-10
Inventor： Haruka Takano
Abstract: A TOF (time of flight) type distance measuring system of high accuracy is provided. The distance measuring system includes: a light source unit for emitting light at a timing indicated by an emission signal; a light receiving unit for acquiring RAW data for each pixel from an imaging sensor, by exposing the imaging sensor to the light reflected from an object at a timing indicated by an exposure signal; a TOF calculation unit for supplying a TOF signal indicating the distance from each pixel to the object that is calculated based on the RAW data; a detection unit for detecting the difference between a standard value and the TOF signal for a standard pixel on the imaging sensor, and generating a phase control signal and a fine adjustment signal in accordance with the difference; a correction unit for correcting the TOF signal on the basis of the fine adjustment signal, and outputting the correction result as distance information for each pixel; and a control unit for controlling the phase shift of at least one of the emission signal and the exposure signal on the basis of the phase control signal.
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公开(公告)号：US10281565B2
公开(公告)日：2019-05-07
申请号：US15358230
申请日：2016-11-22
Inventor： Syoma Takahashi , Haruka Takano , Tomohiko Kanemitsu
Abstract: A distance measuring device using a TOF (Time of Flight) scheme includes a controller, a light receiver, and a calculator. The controller generates a first exposure signal, a second exposure signal, a third exposure signal, and one particular exposure signal selected from the first, the second, and the third exposure signals. The light receiver performs a first exposing process, a second exposing process, a third exposing process, and a particular exposing process corresponding to the particular exposure signal out of the first, the second, and the third exposing processes. The calculator determines, based on a difference between an exposure amount obtained from the particular exposing process and an exposure amount obtained from an exposing process according to one of the first, second, and the third exposure signals corresponding to the particular exposure signal, whether or not the light emitted from the distance measuring device interferes with light emitted from other distance measuring device.
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公开(公告)号：US10048380B2
公开(公告)日：2018-08-14
申请号：US14973002
申请日：2015-12-17
Inventor： Makoto Yarino , Toshiya Fujii , Mitsuhiko Otani , Haruka Takano
IPC: G01S17/89 , G01S7/486 , H01L27/148 , H04N5/3728 , G01S17/36 , G01S17/10
Abstract: A distance-measuring imaging device includes: a drive control unit; a light source unit; an image processing unit including light receiving units and charge reading units arranged one-to-one; and an image processing unit. The charge reading units are arranged partly at the left side of corresponding ones of the light receiving units and partly at the right side of corresponding ones of the same. In each of a period in which the exposure is performed when the exposure control signal is received after a first delay time since when the light emission control signal is received and a period in which the exposure is performed when the exposure control signal is received after a second delay time longer than the first delay time, since when the light emission control signal is received, the left-side charge reading units read charge leftward, and the right-side charge reading units read charge rightward.
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