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    GLOBAL AND CLUSTER CONTRAST DETECTION IN VISION NEUROMORPHIC SENSORS
    1.
    发明公开
    GLOBAL AND CLUSTER CONTRAST DETECTION IN VISION NEUROMORPHIC SENSORS 审中-公开

    公开(公告)号：EP4412236A1

    公开(公告)日：2024-08-07

    申请号：EP23305156.4

    申请日：2023-02-06

    申请人： Prophesee

    发明人： FINATEU, Thomas ,  SHAHROKHI, Farzaneh

    IPC分类号： H04N25/47 ,  H04N25/709

    CPC分类号： H04N25/47 ,  H04N25/709

    摘要： An event-based vision sensor comprises an array of pixel circuits (60), each configured to produce a respective photocurrent, wherein the array of pixel circuits is divided into one or more clusters (120) of multiple pixel circuits; and a cluster control circuit (102, 104) configured, for each cluster, to generate (i) a summation (IPSUM) of the photocurrents produced by the pixel circuits of the cluster and (ii) cluster events (PCS, NEG) based on changes in the summation of the photocurrents.

    RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM
    6.
    发明公开
    RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM 审中-公开

    公开(公告)号：EP4358532A1

    公开(公告)日：2024-04-24

    申请号：EP23211422.3

    申请日：2020-11-04

    申请人： CANON KABUSHIKI KAISHA

    发明人： OFUJI, Masato ,  KAWANABE, Jun ,  FUJIYOSHI, Kentaro ,  WATANABE, Minoru ,  SUZUKI, Kai ,  OKADA, Hideyuki

    IPC分类号： H04N25/617 ,  H04N25/709 ,  H04N25/75 ,  H04N25/76

    CPC分类号： H04N25/617 ,  H04N25/709 ,  H04N25/76 ,  H04N25/75 ,  H04N25/30

    摘要： A radiation imaging apparatus (100) comprises a pixel unit (101) in which a plurality of pixels (200) each including a conversion element (202) configured to convert radiation into charges, and a switch element (201) are arranged in a matrix, a driving circuit (214) configured to control the switch elements (201) via a plurality of drive lines (Vg) extending in a row direction, a bias power supply unit (104) configured to supply a bias potential to the conversion element (202) via a bias line (Bs), a plurality of column signal lines (Sig) to which signals are output from the plurality of pixels (200) via the switch elements (201) and a detection unit (106). The plurality of pixels (200) include a first pixel (200a) and a second pixel (200b), which are adjacent to each other in the row direction and are connected to a common column signal line in the plurality of column signal lines (Sig), the switch element (201) of the first pixel (200a) and the switch element (201) of the second pixel (200b) are connected to drive lines different from each other in the plurality of drive lines (Vg), and the detection unit (106) determines presence/absence of radiation irradiation based on a current flowing to the bias line (Bs), the bias power supply unit includes a first bias power supply unit and a second bias power supply unit, the bias line includes a first bias line connected to the first bias power supply unit, and a second bias line connected to the second bias power supply unit and electrically independent of the first bias line, the conversion element of the first pixel is connected to the first bias power supply unit via the first bias line, and the conversion element of the second pixel is connected to the second bias power supply unit via the second bias line. The detection unit acquires a first signal value representing a current flowing to the first bias line when the switch element of a pixel in pixels whose conversion elements are connected to the first bias power supply unit in the plurality of pixels is in a conduction state, and a second signal value representing a current flowing to the second bias line when the switch element of a pixel whose conversion element is connected to the second bias power supply unit in the plurality of pixels is in a non-conduction state such that sampling timings at least partially overlap, and determines the presence/absence of radiation irradiation based on the first signal value and the second signal value.

    IMAGE-CAPTURE DEVICE
    7.
    发明公开
    IMAGE-CAPTURE DEVICE 审中-公开

    公开(公告)号：EP4429262A2

    公开(公告)日：2024-09-11

    申请号：EP24190879.7

    申请日：2016-11-11

    申请人： Panasonic Intellectual Property Management Co., Ltd.

    发明人： MIYAKE, Yasuo ,  MURAKAMI, Masashi ,  TAMAKI, Tokuhiko ,  SATOU, Yoshiaki

    IPC分类号： H04N25/76

    CPC分类号： H01L27/14669 ,  H01L27/14612 ,  H04N25/531 ,  H04N25/709 ,  H04N25/76 ,  H10K39/32 ,  H10K85/311 ,  H04N25/532 ,  H04N25/62

    摘要： An imaging device includes: unit pixel cells each including a first electrode, a second electrode facing the first electrode, a photoelectric conversion layer between the first electrode and second electrode, a charge accumulation region electrically connected to the first electrode, and a signal detection circuit electrically connected to the charge accumulation region; and a voltage supply circuit electrically connected to the second electrode, the voltage supply circuit supplying a first voltage to the second electrode in an exposure period that is a period for accumulating charges generated by photoelectric conversion in the charge accumulation region, the voltage supply circuit supplying a second voltage that is different from the first voltage to the second electrode in a non-exposure period. The start and end of the exposure period is common to the unit pixel cells.

    GLOBAL AND CLUSTER CONTRAST DETECTION IN VISION NEUROMORPHIC SENSORS
    8.
    发明公开
    GLOBAL AND CLUSTER CONTRAST DETECTION IN VISION NEUROMORPHIC SENSORS 审中-公开

    公开(公告)号：EP4412237A1

    公开(公告)日：2024-08-07

    申请号：EP24152361.2

    申请日：2024-01-17

    申请人： Prophesee

    发明人： FINATEU, Thomas ,  SHAHROKHI, Farzaneh

    IPC分类号： H04N25/47 ,  H04N25/709

    CPC分类号： H04N25/47 ,  H04N25/709

    摘要： An event-based vision sensor comprises an array of pixel circuits (60), each configured to produce a respective photocurrent, wherein the array of pixel circuits is divided into one or more clusters (120) of multiple pixel circuits; and a cluster control circuit (102, 104) configured, for each cluster, to generate (i) a summation (IPSUM) of the photocurrents produced by the pixel circuits of the cluster and (ii) cluster events (POS, NEG) based on changes in the summation of the photocurrents.