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1.发明申请公开(公告)号：US20210341587A1
公开(公告)日：2021-11-04
申请号：US17344417
申请日：2021-06-10
Applicant: DENSO CORPORATION
Inventor： Teiyu KIMURA , Kenichi YANAI , Shinji KASHIWADA , Yoshihide TACHINO
Abstract: An optical ranging device includes a light emitting section provided with a semiconductor laser element having a light emitting region whose length in a first direction is more than that in a second direction intersecting the first direction. The device measures the distance to an object based on the time from light emission from the light emitting section to reception of the light by a light receiving section. A plurality of light emitting regions may be provided in the light emitting section such that they are separated in the second direction and abut or partially overlap each other in the first direction so that the light emitting regions are continuous in the first direction.
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公开(公告)号：US20210088658A1
公开(公告)日：2021-03-25
申请号：US17112559
申请日：2020-12-04
Applicant: DENSO CORPORATION
Inventor： Takehiro HATA , Noriyuki OZAKI , Teiyu KIMURA
IPC: G01S17/08 , G01S7/4863 , G01S7/484
Abstract: A distance measuring apparatus is provided which includes an illuminator, a plurality of photodetectors which detect reflected light arising from reflection of light, as emitted from the illuminator, from an object using SPADs, a time measuring unit which measures time elapsed after the emission of light from the illuminator until a number of the photodetectors which is larger than a given value have detected light, a timing controller which instructs the illuminator to emit the light, activates the SPADs in a Geiger mode, and instructs the time measuring unit to execute the time measurement, and a timing instruction unit which determines a light emission timing and an activation start timing of each of the SPADs for the timing controller.
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公开(公告)号：US20200041621A1
公开(公告)日：2020-02-06
申请号：US16597109
申请日：2019-10-09
Applicant: DENSO CORPORATION
Inventor： Noriyuki OZAKI , Teiyu KIMURA , Kenta AZUMA , Takehiro HATA
IPC: G01S7/486 , G01S7/487 , G01S17/08 , H01L31/107
Abstract: A plurality of photodetectors form a light receiving group, and a plurality of the light receiving groups form one pixel. A light receiving array is provided with one or more of such pixels. The photodetectors each output a pulse signal in response to irradiation of a photon. A measuring unit is provided for each of the plurality of light receiving groups. The measuring unit generates time information representing an elapsed time from an irradiation timing input from outside and light quantity information acquired at each of one or more timings identified from the time information, in accordance with the pulse signal output from the light receiving group. The number of the photodetectors outputting the pulse signal among the plurality of photodetectors belonging to the light receiving group is used as the light quantity information.
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公开(公告)号：US20210382177A1
公开(公告)日：2021-12-09
申请号：US17406588
申请日：2021-08-19
Applicant: DENSO CORPORATION
Inventor： Toshiaki NAGAI , Teiyu KIMURA , Fumiaki MIZUNO , Akifumi UENO
IPC: G01S17/931 , G01S17/08 , G06K9/00
Abstract: In a system for monitoring surroundings of a vehicle, an optical ranging device including a light emitting unit, a light receiving unit configured to receive reflected light from a measurement region, toward which the illumination light from the light emitting unit is projected, and a measurement unit configured to measure a distance to an object within the measurement region using a signal corresponding to a state of the reflected light, output from the light receiving unit. A shape of the measurement region as the illumination light is projected along a horizontal direction onto a cylindrical plane along a vertical direction, surrounding the optical ranging device, is a narrow-at-end shape. The optical ranging device and another optical ranging device are arranged on the vehicle such that the illumination light from the optical ranging device has a larger depression angle than illumination light from the other optical ranging device.
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公开(公告)号：US20210373156A1
公开(公告)日：2021-12-02
申请号：US17401014
申请日：2021-08-12
Applicant: DENSO CORPORATION
Inventor： Teiyu KIMURA , Noriyuki OZAKI , Takehiro HATA , Mineki SOGA , Hiroyuki MATSUBARA , Isamu TAKAI
IPC: G01S17/08 , G01S17/931 , G01S7/4861 , G01S7/484
Abstract: An optical distance measuring apparatus comprises a laser diode emitting a light pulse, light receiver including a photon-counting light receiver, distance measurement unit including a signal discriminator and propagation estimator, and threshold determiner. The signal discriminator discriminates the signal component, exceeding a threshold, of the signal as a reflected signal resulting from reflection of the light pulse at a measurement object. The propagation estimator estimates a round-trip propagation time of the light pulse to the measurement object using the signal. The threshold determiner sets a boundary level as the threshold, corresponding to a reference level obtained from the signal when the signal discriminator determines the reflected signal, using the relationship between the reference and the boundary level. The reference level is obtained from the average value of a noise probability distribution in the signal. The boundary level represents a predetermined cumulative probability in the noise probability distribution.
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Patent Agency Ranking
公开(公告)号：US20210181308A1
公开(公告)日：2021-06-17
申请号：US17169238
申请日：2021-02-05
Applicant: DENSO CORPORATION
Inventor： Noriyuki OZAKI , Mitsuhiro KIYONO , Teiyu KIMURA , Shinji KASHIWADA
Abstract: An optical distance measuring device includes: a light source unit that irradiates a measurement region with irradiation light; a light receiving unit that has a light receiving surface including a plurality of light receiving elements capable of receiving reflected light from a range including the measurement region corresponding to irradiation with the irradiation light and outputs a signal corresponding to a light receiving state of the reflected light for each of the light receiving elements; and a measurement unit that measures a distance to an object in the measurement region by using the signal outputted from the light receiving unit. The light receiving unit has a function of selecting a light receiving element that outputs the signal so that a light receiving position at which the reflected light is received is variable, and the light receiving unit changes the light receiving position to a plurality of positions with respect to a position of the reflected light.
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公开(公告)号：US20200233069A1
公开(公告)日：2020-07-23
申请号：US16843191
申请日：2020-04-08
Applicant: DENSO CORPORATION
Inventor： Noriyuki OZAKI , Teiyu KIMURA , Kenta AZUMA , Takehiro HATA
IPC: G01S7/4865 , G01S7/487 , H01L31/107 , G01S17/08 , G01S7/4863
Abstract: A plurality of photodetectors form a light receiving group, and a plurality of the light receiving groups form one pixel. A light receiving array is provided with one or more of such pixels. The photodetectors each output a pulse signal in response to irradiation of a photon. A measuring unit is provided for each of the plurality of light receiving groups. The measuring unit generates time information representing an elapsed time from an irradiation timing input from outside and light quantity information acquired at each of one or more timings identified from the time information, in accordance with the pulse signal output from the light receiving group. The number of the photodetectors outputting the pulse signal among the plurality of photodetectors belonging to the light receiving group is used as the light quantity information.
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公开(公告)号：US20240012111A1
公开(公告)日：2024-01-11
申请号：US18471185
申请日：2023-09-20
Applicant: DENSO CORPORATION
Inventor： Noriyuki OZAKI , Mitsuhiro KIYONO , Teiyu KIMURA , Shinji KASHIWADA
Abstract: An optical distance measuring device includes: a light source unit that irradiates a measurement region with irradiation light; a light receiving unit that has a light receiving surface including a plurality of light receiving elements capable of receiving reflected light from a range including the measurement region corresponding to irradiation with the irradiation light and outputs a signal corresponding to a light receiving state of the reflected light for each of the light receiving elements; and a measurement unit that measures a distance to an object in the measurement region by using the signal outputted from the light receiving unit. The light receiving unit has a function of selecting a light receiving element that outputs the signal so that a light receiving position at which the reflected light is received is variable, and the light receiving unit changes the light receiving position to a plurality of positions with respect to a position of the reflected light.
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公开(公告)号：US20200379111A1
公开(公告)日：2020-12-03
申请号：US16997182
申请日：2020-08-19
Applicant: DENSO CORPORATION
Inventor： Teiyu KIMURA , Isamu TAKAI
IPC: G01S17/10 , G06T7/50 , G01S17/894
Abstract: An optical distance measuring device includes: a light source unit; a light receiving unit that includes a plurality of light receiving elements; an addition unit that adds the number of pulse signals; a histogram generation unit that generates a histogram that records the addition value for each time of flight; a peak detection unit that determines a distance value from the time of flight corresponding to the peak; an image generation unit that generates signal intensity image data and distance image data; a low signal intensity element detection unit that detects a low signal intensity element from the elements of the signal intensity image data; and an image correction unit that corrects a distance value recorded in a target element corresponding to the low signal intensity element in accordance with a distance value of at least one other element in the elements of the distance image data.
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公开(公告)号：US20200044098A1
公开(公告)日：2020-02-06
申请号：US16583674
申请日：2019-09-26
Applicant: DENSO CORPORATION
Inventor： Kenta AZUMA , Teiyu KIMURA , Noriyuki OZAKI , Shinji KASHIWADA , Takehiro HATA , Isamu TAKAI , Hiroyuki MATSUBARA
Abstract: A light detector is provided to include a detection module, and a monitoring SPAD. The detection module includes an SPAD that is an avalanche photodiode operable in Geiger mode; the detection module is configured to perform light detection by applying, to the SPAD, a reverse bias voltage in a reverse direction. The monitoring SPAD has characteristics identical to characteristics of the SPAD in the detection module. The reverse bias voltage is generated to be applied to the SPAD in the detection module based on (i) a reference breakdown voltage set from a breakdown voltage generated across the monitoring SPAD in Geiger mode and (ii) a predetermined excess voltage.
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