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No. Publication Number Title Publication/Patent Number Publication/Patent Number Publication Date Publication Date
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1 US2020018831A1
LIGHT DETECTOR
Publication/Patent Number: US2020018831A1 Publication Date: 2020-01-16 Application Number: 16/582,290 Filing Date: 2019-09-25 Inventor: Azuma, Kenta   Ozaki, Noriyuki   Kashiwada, Shinji   Kimura, Teiyu   Takai, Isamu   Matsubara, Hiroyuki   Assignee: DENSO CORPORATION   IPC: G01S7/486 Abstract: 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. 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 ...More Less
2 US2020044098A1
LIGHT DETECTOR
Publication/Patent Number: US2020044098A1 Publication Date: 2020-02-06 Application Number: 16/583,674 Filing Date: 2019-09-26 Inventor: Azuma, Kenta   Kimura, Teiyu   Ozaki, Noriyuki   Kashiwada, Shinji   Hata, Takehiro   Takai, Isamu   Matsubara, Hiroyuki   Assignee: DENSO CORPORATION   IPC: H01L31/02 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. 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 ...More Less
3 US2020044109A1
PHOTODETECTOR
Publication/Patent Number: US2020044109A1 Publication Date: 2020-02-06 Application Number: 16/598,295 Filing Date: 2019-10-10 Inventor: Azuma, Kenta   Ozaki, Noriyuki   Kashiwada, Shinji   Kimura, Teiyu   Takai, Isamu   Matsubara, Hiroyuki   Ohta, Mitsuhiko   Hiratsuka, Shigeyoshi   Assignee: DENSO CORPORATION   KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO   IPC: H01L31/107 Abstract: 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. 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 ...More Less
4 US2020018832A1
PHOTODETECTOR AND DISTANCE MEASUREMENT APPARATUS
Publication/Patent Number: US2020018832A1 Publication Date: 2020-01-16 Application Number: 16/584,093 Filing Date: 2019-09-26 Inventor: Azuma, Kenta   Ozaki, Noriyuki   Kashiwada, Shinji   Kimura, Teiyu   Takai, Isamu   Matsubara, Hiroyuki   Ohta, Mitsuhiko   Hiratsuka, Shigeyoshi   Assignee: DENSO CORPORATION   IPC: G01S7/486 Abstract: 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. 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 ...More Less
5 EP2009611B8
LANE-DIVIDING LINE DETECTION DEVICE
Publication/Patent Number: EP2009611B8 Publication Date: 2019-09-04 Application Number: 07739324.7 Filing Date: 2007-03-22 Inventor: Nishida, Makoto   Takai, Isamu   Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA   IPC: G08G1/16
6 US2019265333A1
METHOD AND APPARATUS FOR OPTICALLY MEASURING DISTANCE
Publication/Patent Number: US2019265333A1 Publication Date: 2019-08-29 Application Number: 16/282,756 Filing Date: 2019-02-22 Inventor: Ueno, Akifumi   Takai, Isamu   Assignee: DENSO CORPORATION   IPC: G01S7/48 Abstract: In an apparatus, each of light receiving elements outputs an intensity signal based on a corresponding intensity of return light from a measurement space. The return light includes reflected light reflected based on reflection of the measurement light by a target object. An identifying unit identifies a light receiving area in the light detection region as a function of the intensity signals of the respective light receiving elements. The light receiving area is based on specified light receiving elements in the plurality of light receiving elements. The specified light receiving elements are arranged to receive the reflected light. A distance measuring unit measures the distance of the target object in accordance with the intensity signals received by the specified light receiving elements. In an apparatus, each of light receiving elements outputs an intensity signal based on a corresponding intensity of return light from a measurement space. The return light includes reflected light reflected based on reflection of the measurement light by a target object. An ...More Less
7 EP2009611B1
ROAD DIVISION LINE DETECTOR
Publication/Patent Number: EP2009611B1 Publication Date: 2019-07-03 Application Number: 07739324.7 Filing Date: 2007-03-22 Inventor: Nishida, Makoto   Takai, Isamu   Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA   IPC: G08G1/16
8 US2019265356A1
METHOD AND APPARATUS FOR OPTICALLY MEASURING DISTANCE
Publication/Patent Number: US2019265356A1 Publication Date: 2019-08-29 Application Number: 16/282,805 Filing Date: 2019-02-22 Inventor: Ueno, Akifumi   Takai, Isamu   Assignee: DENSO CORPORATION   IPC: G01S17/10 Abstract: In an apparatus, each of light receiving elements outputs an intensity signal based on a corresponding intensity of return light from a measurement space. The return light includes reflected light reflected based on reflection of the measurement light by a target object. An identifying unit identifies a light receiving area in the light detection region as a function of the intensity signals of the respective light receiving elements. The light receiving area is based on specified light receiving elements in the plurality of light receiving elements. The specified light receiving elements are arranged to receive the reflected light. An estimating unit estimates, based on a geometry of the light receiving area, a state of the apparatus including a state of the optical system. In an apparatus, each of light receiving elements outputs an intensity signal based on a corresponding intensity of return light from a measurement space. The return light includes reflected light reflected based on reflection of the measurement light by a target object. An ...More Less
9 US2019259899A1
PHOTODETECTOR AND OPTICAL DISTANCE MEASURING DEVICE
Publication/Patent Number: US2019259899A1 Publication Date: 2019-08-22 Application Number: 16/273,419 Filing Date: 2019-02-12 Inventor: Ito, Seigo   Takai, Isamu   Matsubara, Hiroyuki   Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO   IPC: G01S7/486 Abstract: A photodetector includes a light receiving part having a plurality of light receiving elements, and a signal processing part that adds outputs from the light receiving elements and outputs the result. A plurality of measurements are performed while combination of effective light receiving elements among the light receiving elements in the light receiving part is changed. The results of the measurements are subjected to a compressive sensing process to determine an output signal of for each light receiving element or for each group of light receiving elements. A photodetector includes a light receiving part having a plurality of light receiving elements, and a signal processing part that adds outputs from the light receiving elements and outputs the result. A plurality of measurements are performed while combination of effective light ...More Less
10 JP6241283B2
RADAR DEVICE AND METHOD FOR MEASURING DISTANCE AND SPEED
Publication/Patent Number: JP6241283B2 Publication Date: 2017-12-06 Application Number: 2014000223 Filing Date: 2014-01-06 Inventor: Inoue, Daisuke   Ichikawa, Tadashi   Nakai, Makoto   Yamashita, Tatsuya   Takai, Isamu   Assignee: TOYOTA CENTRAL R&D LABS INC   IPC: G01S17/58 Abstract: PROBLEM TO BE SOLVED: To provide a radar device for measuring the distance and speed of an object with high accuracy at low cost.SOLUTION: A laser beam outputted from a laser 10 is intensity-modulated with a periodic signal from an oscillator 11 by a modulator 12 before being outputted. The periodic signal is a cosine wave PROBLEM TO BE SOLVED: To provide a radar device for measuring the distance and speed of an object with high accuracy at low cost.SOLUTION: A laser beam outputted from a laser 10 is intensity-modulated with a periodic signal from an oscillator 11 by a modulator 12 before being ...More Less
11 US9307171B2
Solid state image pick-up device, and pixel
Publication/Patent Number: US9307171B2 Publication Date: 2016-04-05 Application Number: 14/234,878 Filing Date: 2012-07-25 Inventor: Kawahito, Shoji   Takai, Isamu   Assignee: NATIONAL UNIVERSITY CORPORATION SHIZUOKA UNIVERSITY   IPC: H04N5/374 Abstract: A pixel 10 includes a photodiode PD which is provided between a first barrier region 21 forming a first potential barrier B1 and a second barrier region 27 forming a second potential barrier B2, a first floating diffusion region F1 which is provided adjacent to the first barrier region 21, and to which a first electric charge generated in the photodiode PD is transferred, and a second floating diffusion region F2 which is provided adjacent to the second barrier region 27, and into which a second electric charge generated in the photoelectric conversion region PD flows, and in which a part of the flowing-in second electric charge is accumulated. The second potential barrier B2 is lower than the first potential barrier B1. A pixel 10 includes a photodiode PD which is provided between a first barrier region 21 forming a first potential barrier B1 and a second barrier region 27 forming a second potential barrier B2, a first floating diffusion region F1 which is provided adjacent to the first barrier ...More Less
12 JP5846554B2
SOLID STATE IMAGING DEVICE AND PIXEL
Publication/Patent Number: JP5846554B2 Publication Date: 2016-01-20 Application Number: 2011167420 Filing Date: 2011-07-29 Inventor: Kawahito, Shoji   Takai, Isamu   Assignee: NATIONAL UNIV CORP SHIZUOKA UNIV   TOYOTA CENTRAL R&D LABS INC   IPC: H04N5/3745 Abstract: PROBLEM TO BE SOLVED: To provide a pixel capable of acquiring an image signal and a communication signal without deteriorating sensitivity.SOLUTION: A pixel 10 includes: a photodiode PD disposed between a first barrier region 21 forming a first potential barrier B1 and a second barrier region 27 forming a second potential barrier B2; a first floating diffusion region F1 which is juxtaposed with the first barrier region 21 and to which a first electric charge generated in the photodiode PD is transferred; and a second floating diffusion region F2 which is juxtaposed with the second barrier region 27 and to which a second electric charge generated in a photoelectric conversion region PD flows so as to store a portion of the inflow second charge. The second potential barrier B2 is lower than the first potential barrier B1. PROBLEM TO BE SOLVED: To provide a pixel capable of acquiring an image signal and a communication signal without deteriorating sensitivity.SOLUTION: A pixel 10 includes: a photodiode PD disposed between a first barrier region 21 forming a first potential barrier B1 and a second ...More Less
13 EP2739037B1
SOLID STATE IMAGE PICK-UP DEVICE, AND PIXEL
Publication/Patent Number: EP2739037B1 Publication Date: 2016-04-20 Application Number: 12819277.0 Filing Date: 2012-07-25 Inventor: Kawahito, Shoji   Takai, Isamu   Assignee: National University Corporation Shizuoka University   IPC: H04N5/3745 Abstract: A pixel 10 includes a photodiode PD which is provided between a first barrier region 21 forming a first potential barrier B1 and a second barrier region 27 forming a second potential barrier B2, a first floating diffusion region F1 which is provided adjacent to the first barrier region 21, and to which a first electric charge generated in the photodiode PD is transferred, and a second floating diffusion region F2 which is provided adjacent to the second barrier region 27, and into which a second electric charge generated in the photoelectric conversion region PD flows, and in which a part of the flowing-in second electric charge is accumulated. The second potential barrier B2 is lower than the first potential barrier B1. A pixel 10 includes a photodiode PD which is provided between a first barrier region 21 forming a first potential barrier B1 and a second barrier region 27 forming a second potential barrier B2, a first floating diffusion region F1 which is provided adjacent to the first barrier ...More Less
14 KR101596796B1
INFORMATION ACQUISITION DEVICE AND OPTICAL COMMUNICATION SYSTEM
Publication/Patent Number: KR101596796B1 Publication Date: 2016-02-23 Application Number: 20117008619 Filing Date: 2009-09-18 Inventor: Kawahito, Shoji   Michinori, Ando   Takai, Isamu   Assignee: National University Corporation Shizuoka University   IPC: H01L27/146 Abstract: 본 발명은
15 EP2352240B1
INFORMATION ACQUISITION DEVICE AND OPTICAL COMMUNICATION SYSTEM
Publication/Patent Number: EP2352240B1 Publication Date: 2016-12-28 Application Number: 09814686.3 Filing Date: 2009-09-18 Inventor: Kawahito, Shoji   Takai, Isamu   Ando, Michinori   Assignee: National University Corporation Shizuoka University   IPC: H01L27/146 Abstract: At least one cell (X ij ) implementing a sensor array embraces a photoelectric-conversion accumulation element (9) configured to generate and accumulate signal charges, a potential detection circuit (14) configured to detect the signal charges generated by the photoelectric-conversion accumulation element (9) as a potential change, and an amplification circuit (15) configured to amplify the potential change and to transmit to an output-signal line (B j ). The photoelectric-conversion accumulation element (9) and the potential detection circuit (14) are connected in series between a first potential terminal (T1) and a second potential terminal (T2), and the potential detection circuit (14) has an insulated-gate transistor (Tr14), which detects the potential change in a weak inversion state, in a period when an optical-communication signal is received. At least one cell (X ij ) implementing a sensor array embraces a photoelectric-conversion accumulation element (9) configured to generate and accumulate signal charges, a potential detection circuit (14) configured to detect the signal charges generated by the ...More Less
16 EP2009611A4
ROAD DIVISION LINE DETECTOR
Publication/Patent Number: EP2009611A4 Publication Date: 2015-04-08 Application Number: 07739324 Filing Date: 2007-03-22 Inventor: Nishida, Makoto   Takai, Isamu   Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA   IPC: B60R21/00 Abstract: The present invention relates to a lane-dividing line detection device and has an object of detecting a lane-dividing line with high accuracy by accurately extracting characteristic points of the lane-dividing line while responding flexibly to road surface conditions. According to the present invention The present invention relates to a lane-dividing line detection device and has an object of detecting a lane-dividing line with high accuracy by accurately extracting characteristic points of the lane-dividing line while responding flexibly to road surface conditions. According ...More Less
17 EP2739037A4
SOLID STATE IMAGE PICK-UP DEVICE
Publication/Patent Number: EP2739037A4 Publication Date: 2015-04-01 Application Number: 12819277 Filing Date: 2012-07-25 Inventor: Takai, Isamu   Kawahito, Shoji   Assignee: National University Corporation Shizuoka University   IPC: H01L27/146 Abstract: A pixel 10 includes a photodiode PD which is provided between a first barrier region 21 forming a first potential barrier B1 and a second barrier region 27 forming a second potential barrier B2
18 JP5803534B2
OPTICAL COMMUNICATION DEVICE AND PROGRAM
Publication/Patent Number: JP5803534B2 Publication Date: 2015-11-04 Application Number: 2011221304 Filing Date: 2011-10-05 Inventor: Harada, Tomoyasu   Takai, Isamu   Ando, Michinori   Ito, Kota   Assignee: TOYOTA CENTRAL R&D LABS INC   IPC: H04B10/00 Abstract: PROBLEM TO BE SOLVED: To obtain highly accurate information indicating the relative relation between transmission means and imaging means by a device alone.SOLUTION: A reception control unit 14 obtains a prescribed number of frame images having imaged a region including a light-emitting part 52 of an optical signal transmission device 50 for transmitting communication information C indicating the height H of the light-emitting part 52 by an optical signal PROBLEM TO BE SOLVED: To obtain highly accurate information indicating the relative relation between transmission means and imaging means by a device alone.SOLUTION: A reception control unit 14 obtains a prescribed number of frame images having imaged a region including a ...More Less
19 JP2015129646A
RADAR DEVICE AND METHOD FOR MEASURING DISTANCE AND SPEED
Publication/Patent Number: JP2015129646A Publication Date: 2015-07-16 Application Number: 2014000223 Filing Date: 2014-01-06 Inventor: Inoue, Daisuke   Ichikawa, Tadashi   Nakai, Makoto   Yamashita, Tatsuya   Takai, Isamu   Assignee: TOYOTA CENTRAL R&D LABS INC   IPC: G01S17/58 Abstract: PROBLEM TO BE SOLVED: To provide a radar device for measuring the distance and speed of an object with high accuracy at low cost.SOLUTION: A laser beam outputted from a laser 10 is intensity-modulated with a periodic signal from an oscillator 11 by a modulator 12 before being outputted. The periodic signal is a cosine wave PROBLEM TO BE SOLVED: To provide a radar device for measuring the distance and speed of an object with high accuracy at low cost.SOLUTION: A laser beam outputted from a laser 10 is intensity-modulated with a periodic signal from an oscillator 11 by a modulator 12 before being ...More Less
20 KR20140044909A
SOLID STATE IMAGE PICK-UP DEVICE
Publication/Patent Number: KR20140044909A Publication Date: 2014-04-15 Application Number: 20147003604 Filing Date: 2012-07-25 Inventor: Kawahito, Shoji   Takai, Isamu   Assignee: National University Corporation Shizuoka University   IPC: H04N5/3745