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    MEASUREMENT OF A LASER PULSE REPETITION FREQUENCY USING UPCONVERSION
    1.
    发明申请
    MEASUREMENT OF A LASER PULSE REPETITION FREQUENCY USING UPCONVERSION 有权

    公开(公告)号：US20250071397A1

    公开(公告)日：2025-02-27

    申请号：US18801131

    申请日：2024-08-12

    Applicant: SRI International

    Inventor： Peter A. Levine ,  Rui Zhu ,  Namwoong Paik ,  John D. Bazzano

    IPC: H04N23/11 ,  H01L27/146 ,  H04N25/773

    Abstract: A silicon-based image sensor can have i) a pixel array with one or more pixels and ii) an upconversion layer of crystals on at least one of a front side and a backside of the silicon-based image sensor. A pulse repetition frequency decoder cooperates with the upconversion layer of crystals to decode a pulse repetition frequency of a laser flash captured by one or more of the pixels of the silicon-based image sensor. The pulse repetition frequency decoder can use a known frame rate of the silicon-based image sensor and a decay time of an upconverting emission from the upconversion layer of crystals to decode the pulse repetition frequency of the laser flash.

    ON-THE-FLY DEFECTIVE PIXEL CORRECTION
    2.
    发明公开
    ON-THE-FLY DEFECTIVE PIXEL CORRECTION 审中-公开

    公开(公告)号：US20240323557A1

    公开(公告)日：2024-09-26

    申请号：US18242940

    申请日：2022-03-23

    Applicant: SRI International

    Inventor： Rui Zhu ,  Peter A Levine ,  Colin Earle

    IPC: H04N25/683 ,  H04N25/63

    CPC classification number: H04N25/683 ,  H04N25/63

    Abstract: An image sensor with a pixel array that has two or more pixels is discussed. The defective pixel detector detects a defective pixel. A dynamic threshold range is based on amplitude levels of neighboring pixels. The defective pixel detector detects the defective pixel with the dynamic threshold range to detect and determine a defective status for the pixel under analysis based on an amplitude level of the pixel under analysis relative to the amplitude levels of neighboring pixels. The defective pixel detector applies algorithms to create candidate pixel patterns for the neighboring pixels used to create the dynamic threshold range. The value of the dynamic threshold range will change based on the amplitude levels of the neighboring pixels.

    EXTENDED DYNAMIC RANGE IMAGING SENSOR AND OPERATING MODE OF THE SAME
    4.
    发明申请
    EXTENDED DYNAMIC RANGE IMAGING SENSOR AND OPERATING MODE OF THE SAME 审中-公开

    公开(公告)号：US20200027911A1

    公开(公告)日：2020-01-23

    申请号：US16175662

    申请日：2018-10-30

    Applicant: SRI International

    Inventor： John Robertson Tower ,  Robert Michael Guidash ,  Peter Alan Levine ,  Rui Zhu

    IPC: H01L27/146 ,  H04N5/3745 ,  H04N5/355

    Abstract: An imaging system for capturing light over a wide dynamic range and method for operating the same are provided. In some aspects, the method includes positioning an imaging pixel to image a scene described by light signals that extend over a wide dynamic range, and selecting a different integration time for at least two photodiodes in the imaging pixel based on light signals received by the imaging pixel, wherein the photodiodes are coupled to a sense node, and each photodiode is controlled using a different transfer gate. The method also includes performing a readout of the imaging pixel using a readout circuit connected to the sense node, wherein a capacitance associated with the sense node is modified during the readout of the at least two photodiodes.

    Extended dynamic range imaging sensor and operating mode of the same
    5.
    发明授权
    Extended dynamic range imaging sensor and operating mode of the same 有权

    公开(公告)号：US10257448B1

    公开(公告)日：2019-04-09

    申请号：US15238063

    申请日：2016-08-16

    Applicant: SRI International

    Inventor： John Robertson Tower ,  Robert Michael Guidash ,  Peter Alan Levine ,  Rui Zhu

    IPC: H04N5/355 ,  H04N5/374 ,  H04N5/378 ,  H04N5/353 ,  H01L27/146

    Abstract: An imaging system for capturing light over a wide dynamic range and method for operating the same are provided. In some aspects, the method includes positioning an imaging pixel to image a scene described by light signals that extend over a wide dynamic range, and selecting a different integration time for at least two photodiodes in the imaging pixel based on light signals received by the imaging pixel, wherein the photodiodes are coupled to a sense node, and each photodiode is controlled using a different transfer gate. The method also includes performing a readout of the imaging pixel using a readout circuit connected to the sense node, wherein a capacitance associated with the sense node is modified during the readout of the at least two photodiodes.

    LOW POWER WIDE DYNAMIC RANGE CMOS IMAGER OUTPUT CIRCUIT
    6.
    发明申请
    LOW POWER WIDE DYNAMIC RANGE CMOS IMAGER OUTPUT CIRCUIT 有权
    低功率宽动态范围CMOS图像输出电路

    公开(公告)号：US20140097328A1

    公开(公告)日：2014-04-10

    申请号：US13645206

    申请日：2012-10-04

    Applicant: SRI INTERNATIONAL

    Inventor： Peter Alan Levine ,  Rui Zhu ,  Thomas Richard Senko ,  John Robertson Tower

    IPC: H01L27/146

    CPC classification number: H04N5/2351 ,  H04N5/243

    Abstract: An imager has an array of pixels arranged in rows and columns, readout circuitry electrically coupled to the columns to receive signals from the pixels, the readout circuitry having at least one signal path with gain switching, and a threshold detector electrically coupled to the readout circuitry to set a gain to be applied by the readout circuitry.

    Abstract translation: 成像器具有排列成行和列的像素阵列，电耦合到列以接收来自像素的信号的读出电路，读出电路具有至少一个具有增益切换的信号路径，以及电耦合到读出电路的阈值检测器 以设置由读出电路应用的增益。

    Extended dynamic range imaging sensor and operating mode of the same
    7.
    发明授权
    Extended dynamic range imaging sensor and operating mode of the same 有权

    公开(公告)号：US10535690B1

    公开(公告)日：2020-01-14

    申请号：US16175662

    申请日：2018-10-30

    Applicant: SRI International

    Inventor： John Robertson Tower ,  Robert Michael Guidash ,  Peter Alan Levine ,  Rui Zhu

    IPC: H04N5/355 ,  H01L27/146 ,  H04N5/3745 ,  H04N5/353

    Abstract: An imaging system for capturing light over a wide dynamic range and method for operating the same are provided. In some aspects, the method includes positioning an imaging pixel to image a scene described by light signals that extend over a wide dynamic range, and selecting a different integration time for at least two photodiodes in the imaging pixel based on light signals received by the imaging pixel, wherein the photodiodes are coupled to a sense node, and each photodiode is controlled using a different transfer gate. The method also includes performing a readout of the imaging pixel using a readout circuit connected to the sense node, wherein a capacitance associated with the sense node is modified during the readout of the at least two photodiodes.

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