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    Distance measurement apparatus with detection timing correction
    2.
    发明授权
    Distance measurement apparatus with detection timing correction 有权

    公开(公告)号：US11662442B2

    公开(公告)日：2023-05-30

    申请号：US16720553

    申请日：2019-12-19

    Applicant: DENSO CORPORATION

    Inventor： Akifumi Ueno ,  Takehiro Hata ,  Shinji Kashiwada

    IPC: G01S7/4861 ,  G01S17/08 ,  H01L31/02 ,  G01S7/497 ,  G01S17/89

    CPC classification number: G01S7/4861 ,  G01S7/497 ,  G01S17/08 ,  G01S17/89 ,  H01L31/02027

    Abstract: An optical distance measurement apparatus that measures a distance using a round-trip time of light to an object includes an irradiator, a plurality of SPADs, a plurality of signal output units, a response number detector, a timing identifier, and a timing corrector. The response number detector detects a response number representing the number of responding one of the SPADs based on a pulse signal. The timing identifier identifies a temporary timing based on a state of variation in the response number along a time series and identifies a detection timing representing a timing when the optical distance measurement apparatus detects light in accordance with the temporary timing. The timing corrector acquires a correction time representing a time difference between the temporary timing and a true timing corresponding to a distance to an object and sets a timing corrected from the temporary timing by the correction time as the detection timing.

    Photodetector
    3.
    发明授权
    Photodetector 有权

    公开(公告)号：US11668826B2

    公开(公告)日：2023-06-06

    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 ,  H01L31/0232 ,  G01C3/08 ,  G01S7/481

    CPC classification number: G01S17/10 ,  G01C3/08 ,  G01S7/4816 ,  H01L31/02327

    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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