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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：US20180372538A1
公开(公告)日：2018-12-27
申请号：US16013047
申请日：2018-06-20
Applicant: DENSO CORPORATION
Inventor： Takehiro HATA , Shinji KASHIWADA , Akifumi UENO
IPC: G01J1/44 , H03K5/1534
Abstract: A light detection device has light receiving parts, edge detection circuits and an addition unit. Each light receiving part has a quench resistance, a SPAD and a pulse signal output part. The SPAD responses incident photons, i.e. incident light. The quench resistance and pulse signal output part generate and transmit a pulse signal to a corresponding edge detection circuit when the SPAD receives and responds to the incident light. The edge detection circuits and the addition unit detects the number of edges during a period from a previously received CLK signal to a currently received CLK signal every time it receives a CLK signal transmitted at a predetermined period. The edge represents a state change from a first state which receives no pulse signal to a second state which receives the pulse signal.
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3.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：US20160178902A1
公开(公告)日：2016-06-23
申请号：US14910279
申请日：2014-07-24
Applicant: DENSO CORPORATION
Inventor： Hiroshi ANDO , Shinji KASHIWADA
CPC classification number: G02B27/0101 , B60R1/00 , B60R2300/205 , G02B27/01 , G02B2027/0127 , G02B2027/014 , G02B2027/0141 , G06K9/00805 , G09F9/00 , H04N9/3147
Abstract: An information display apparatus reflects light representing information off a projection target to display the information as a virtual image, and includes a projector, at least two image forming devices and a focus adjusting device. The projector projects the light representing information. The image forming devices, to which the light from the projector is projected, are on an optical path from the projector to the projection target. At least one of the image forming devices is at a distance from the projector different from that of other image forming devices. The focus adjusting device adjusts a focal length of one optical system on an optical path from the projector to each of the image forming devices such that the light from the projector is in focus at each of the image forming devices. An image of information on each of the image forming devices is reflected off the projection target.
Abstract translation: 信息显示装置将表示来自投影对象的信息的光反射以显示作为虚像的信息，并且包括投影仪，至少两个图像形成装置和焦点调整装置。 投影机投射光表示信息。 来自投影仪的光投射到的图像形成装置处于从投影仪到投影对象物的光路上。 图像形成装置中的至少一个距离投影仪与其它图像形成装置的距离不同。 聚焦调节装置调节从投影仪到每个图像形成装置的光路上的一个光学系统的焦距，使得来自投影仪的光在每个图像形成装置处聚焦。 每个图像形成装置上的信息的图像被反射出投影对象。
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公开(公告)号：US20210239834A1
公开(公告)日：2021-08-05
申请号：US17239055
申请日：2021-04-23
Applicant: DENSO CORPORATION
Inventor： Teiyu KIMURA , Kenichi YANAI , Shinji KASHIWADA
Abstract: The laser light for performing a detection for at least 2 pixel parts is scanned in a first direction, covering at least a predetermined angle of field range. A reflection body is driven to reflect the scanned laser light, to scan the laser light in a second direction, covering a predetermined external range. The reflected light from the object is turned towards a light receiving lens by a route changing unit. A light receiving unit provided with a light receiving element for at least 2 pixel parts detects a condensed reflected light from the object. The distance to the object is detected depending on a period from a time when the laser light is emitted to a time when the reflected light is received. The route changing unit is disposed allowing the laser light scanned in the first direction to pass therethrough to reach the reflection body.
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Patent Agency Ranking
公开(公告)号：US20200044109A1
公开(公告)日：2020-02-06
申请号：US16598295
申请日：2019-10-10
Applicant: DENSO CORPORATION , KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
Inventor： Kenta AZUMA , Noriyuki OZAKI , Shinji KASHIWADA , Teiyu KIMURA , Isamu TAKAI , Hiroyuki MATSUBARA , Mitsuhiko OHTA , Shigeyoshi HIRATSUKA
IPC: H01L31/107 , H01L31/02 , H01L27/144
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.
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公开(公告)号：US20200018853A1
公开(公告)日：2020-01-16
申请号：US16584033
申请日：2019-09-26
Applicant: DENSO CORPORATION
Inventor： Takehiro HATA , Noriyuki OZAKI , Teiyu KIMURA , Kenta AZUMA , Shinji KASHIWADA
IPC: G01S17/10 , G01S7/481 , G01C3/08 , H01L31/0232
Abstract: 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.
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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：US20220187429A1
公开(公告)日：2022-06-16
申请号：US17653278
申请日：2022-03-02
Applicant: DENSO CORPORATION
Inventor： Akifumi UENO , Shinji KASHIWADA , Fumiaki MIZUNO
Abstract: An optical ranging device comprises: a light emitting portion emitting laser light; a scanning portion performing a scan using the laser light emitted from the light emitting portion; a light receiving portion receiving incident light; a rotation angle sensor detecting a rotation angle of the scanning portion; and a control device configured to: acquire the rotation angle and output a drive signal to the light emitting portion, and use a correction value determined using at least an emission delay period from when the rotation angle is acquired to when the laser light is emitted, to perform at least one of a first correction control of an emission timing of the laser light and a second correction control of a detection angle of distance data generated using a received light signal output from the light receiving portion that received the laser light.
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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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