公开(公告)号：US11585908B2

公开(公告)日：2023-02-21

申请号：US16843191

申请日：2020-04-08

申请人： DENSO CORPORATION

发明人： Noriyuki Ozaki ,  Teiyu Kimura ,  Kenta Azuma ,  Takehiro Hata

IPC分类号： G01S17/10 ,  G01S7/4865 ,  G01S7/487 ,  H01L31/107 ,  G01S17/08 ,  G01S7/4863

摘要： 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.

公开(公告)号：US20200018832A1

公开(公告)日：2020-01-16

申请号：US16584093

申请日：2019-09-26

申请人： DENSO CORPORATION

发明人： Kenta Azuma ,  Noriyuki Ozaki ,  Shinji Kashiwada ,  Teiyu Kimura ,  Isamu Takai ,  Hiroyuki Matsubara ,  Mitsuhiko Ohta ,  Shigeyoshi Hiratsuka

IPC分类号： G01S7/486 ,  G01S17/10 ,  H01L31/107

摘要： A photodetector includes plural detectors. Each of the plural detectors has a single photon avalanche diode (hereinafter referred to as SPAD) which responds to incidence of a photon. The plural detectors include at least a first detector and a second detector. The SPAD has a recovery time period until the SPAD reaches a next photon-responsive state, in response to the SPAD responding to the incidence of the photon. The recovery time period of the SPAD in the first detector is different from the recovery time period of the SPAD in the second detector.

公开(公告)号：US11422241B2

公开(公告)日：2022-08-23

申请号：US16584093

申请日：2019-09-26

申请人： DENSO CORPORATION

发明人： Kenta Azuma ,  Noriyuki Ozaki ,  Shinji Kashiwada ,  Teiyu Kimura ,  Isamu Takai ,  Hiroyuki Matsubara ,  Mitsuhiko Ohta ,  Shigeyoshi Hiratsuka

IPC分类号： H01L31/107 ,  G01S7/4863 ,  G01S17/10

摘要： A photodetector includes plural detectors. Each of the plural detectors has a single photon avalanche diode (hereinafter referred to as SPAD) which responds to incidence of a photon. The plural detectors include at least a first detector and a second detector. The SPAD has a recovery time period until the SPAD reaches a next photon-responsive state, in response to the SPAD responding to the incidence of the photon. The recovery time period of the SPAD in the first detector is different from the recovery time period of the SPAD in the second detector.

公开(公告)号：US11668826B2

公开(公告)日：2023-06-06

申请号：US16584033

申请日：2019-09-26

申请人： DENSO CORPORATION

发明人： Takehiro Hata ,  Noriyuki Ozaki ,  Teiyu Kimura ,  Kenta Azuma ,  Shinji Kashiwada

IPC分类号： G01S17/10 ,  H01L31/0232 ,  G01C3/08 ,  G01S7/481

CPC分类号： G01S17/10 ,  G01C3/08 ,  G01S7/4816 ,  H01L31/02327

摘要： A light reception array unit receives light irradiated from an irradiation unit and reflected from an object, and outputs in parallel a pulse signal respectively output from a plurality of light reception units. A timer unit measures an elapsed time since an input of an irradiation timing signal. A response acquisition unit acquires a number of responses, which is a number of the light reception units outputting the pulse signal, at each fixed cycle timing, and outputs an adjusted number of responses obtained by subtracting a bias value from the number of responses or dividing the number of responses by the bias value. An address of a memory is associated with a timer value measured by the timer unit. A histogram generation unit integrates and stores, in a memory address specified from a timer value, the adjusted number of responses as data at that address.

公开(公告)号：US11585907B2

公开(公告)日：2023-02-21

申请号：US16597109

申请日：2019-10-09

申请人： DENSO CORPORATION

发明人： Noriyuki Ozaki ,  Teiyu Kimura ,  Kenta Azuma ,  Takehiro Hata

IPC分类号： G01S17/10 ,  G01S7/4865 ,  G01S7/487 ,  H01L31/107 ,  G01S17/08 ,  G01S7/4863

摘要： 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.

公开(公告)号：US11296241B2

公开(公告)日：2022-04-05

申请号：US16583674

申请日：2019-09-26

申请人： DENSO CORPORATION

发明人： Kenta Azuma ,  Teiyu Kimura ,  Noriyuki Ozaki ,  Shinji Kashiwada ,  Takehiro Hata ,  Isamu Takai ,  Hiroyuki Matsubara

IPC分类号： H01L31/02 ,  H01L31/10 ,  G01S7/486 ,  H03F3/08

摘要： 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.

公开(公告)号：US11977156B2

公开(公告)日：2024-05-07

申请号：US16997182

申请日：2020-08-19

申请人： DENSO CORPORATION

发明人： Teiyu Kimura ,  Isamu Takai

IPC分类号： G01S17/10 ,  G01S17/89 ,  G01S17/894 ,  G06T7/50

CPC分类号： G01S17/10 ,  G01S17/89 ,  G01S17/894 ,  G06T7/50 ,  G06T2207/20072

摘要： 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.

公开(公告)号：US11422240B2

公开(公告)日：2022-08-23

申请号：US16582290

申请日：2019-09-25

申请人： DENSO CORPORATION

发明人： Kenta Azuma ,  Noriyuki Ozaki ,  Shinji Kashiwada ,  Teiyu Kimura ,  Isamu Takai ,  Hiroyuki Matsubara

IPC分类号： G01S7/486 ,  G01S7/4863 ,  H01L31/107 ,  G01S17/74

摘要： A light detector is provided to include a light receiving array having a plurality of light receivers respectively outputting pulse signals upon incidence of photons. A delay setting value is set which is used to adjust a time interval from when the pulse signals are output from the light receiving array to when a response number, which is a specified number of the light receivers outputting the pulse signals, is acquired.

公开(公告)号：US11411130B2

公开(公告)日：2022-08-09

申请号：US16598295

申请日：2019-10-10

申请人： DENSO CORPORATION

发明人： Kenta Azuma ,  Noriyuki Ozaki ,  Shinji Kashiwada ,  Teiyu Kimura ,  Isamu Takai ,  Hiroyuki Matsubara ,  Mitsuhiko Ohta ,  Shigeyoshi Hiratsuka

IPC分类号： H01L31/107 ,  G01J1/44 ,  H01L27/144 ,  H01L31/02 ,  G01T1/24 ,  G01T1/208 ,  G01T1/20

摘要： A photodetector includes: a photoreceptor provided with a SPAD that is configured to respond to incidence of a photon, and as the response of the SPAD, configured to output a pulse signal; and a pulse rate control circuit configured to control sensitivity of the photoreceptor to have a pulse rate as the number of pulse signals outputted per unit time from the photoreceptor to be a set value set in advance, (i) in a set range including the set value, (ii) in a set range of the set value or more, or (iii) in a set range of the set value or less.