Time-of-Flight Sensor with Reduced Transistor Count Pixels

    公开(公告)号:US20200304741A1

    公开(公告)日:2020-09-24

    申请号:US16362314

    申请日:2019-03-22

    Abstract: A time-of-flight (TOF) sensor includes an array of pixels. Each pixel includes: a differential pixel configured to output a differential voltage signal between first and second nodes, based on an electrical modulation signal applied to different regions of the differential pixel and an incoming correlated light signal; a first readout circuit coupled to the first node; a second readout circuit coupled to the second node; and a compensation circuit coupled to the first and second readout circuits and configured to compensate for offset caused by incoming uncorrelated light. Each readout circuit has a storage device configured to be discharged by photo current during an exposure phase, sensed during a readout phase and recharged during a reset phase. Recharging of each storage device is controlled by a single reset transistor included in each compensation circuit or by one or more global reset transistors located outside the array of pixels.

    TIME-OF-FLIGHT CAMERA WITH LOCATION SENSOR SYSTEM
    13.
    发明申请
    TIME-OF-FLIGHT CAMERA WITH LOCATION SENSOR SYSTEM 有权
    具有位置传感器系统的飞行时间相机

    公开(公告)号:US20150356747A1

    公开(公告)日:2015-12-10

    申请号:US14297999

    申请日:2014-06-06

    Abstract: A time-of-flight (TOF) camera system includes a radiation source, a radiation detector, a location sensor system and a processor. The radiation source is configured to generate and emit a radiation that strikes a target object. The radiation detector is configured to detect the radiation reflected from the target object and generate a sample set comprising at least two raw samples detected in succession at different times based on the reflected radiation. The location sensor system is configured to detect movements of the TOF camera during the detection and generate a movement signal having portions thereof uniquely corresponding to each of the raw samples of the sample set based on the movements of the TOF camera, wherein a portion of the movement signal is detected at a same time of generating the corresponding raw sample. The processor is configured to receive the raw samples and the corresponding movement signal portions and generate an object information based on the raw samples and the corresponding movement signal portion.

    Abstract translation: 飞行时间(TOF)相机系统包括辐射源,辐射探测器,位置传感器系统和处理器。 辐射源被配置为产生和发射撞击目标对象的辐射。 辐射检测器被配置为检测从目标对象反射的辐射,并且生成包括基于反射的辐射在不同时间连续检测到的至少两个原始样本的样本集合。 位置传感器系统被配置为在检测期间检测TOF相机的移动,并且基于TOF相机的移动产生具有与样本集合的每个原始样本唯一对应的部分的移动信号,其中, 在产生相应的原始样本的同时检测运动信号。 处理器被配置为接收原始样本和相应的移动信号部分,并且基于原始样本和相应的移动信号部分生成对象信息。

    Time-of-flight sensor with reduced transistor count pixels

    公开(公告)号:US11159755B2

    公开(公告)日:2021-10-26

    申请号:US16362314

    申请日:2019-03-22

    Abstract: A time-of-flight (TOF) sensor includes an array of pixels. Each pixel includes: a differential pixel configured to output a differential voltage signal between first and second nodes, based on an electrical modulation signal applied to different regions of the differential pixel and an incoming correlated light signal; a first readout circuit coupled to the first node; a second readout circuit coupled to the second node; and a compensation circuit coupled to the first and second readout circuits and configured to compensate for offset caused by incoming uncorrelated light. Each readout circuit has a storage device configured to be discharged by photo current during an exposure phase, sensed during a readout phase and recharged during a reset phase. Recharging of each storage device is controlled by a single reset transistor included in each compensation circuit or by one or more global reset transistors located outside the array of pixels.

    Global pixel binning for ambient light sensing

    公开(公告)号:US10602073B2

    公开(公告)日:2020-03-24

    申请号:US15957335

    申请日:2018-04-19

    Abstract: An imaging system may comprise a plurality of pixels to selectively operate in a first operating mode or a second operating mode. When operating in the first operating mode, the plurality of pixels is binned during an exposure phase such that an output during a readout phase corresponds to a summed photocurrent that is a sum of a plurality of concurrent photocurrents, each corresponding to one of the plurality of pixels. When operating in the second operating mode, the plurality of pixels is not binned during the exposure phase such that an output during the readout phase corresponds to a set of separate photocurrents, each corresponding to one of a set of the plurality of pixels.

    GLOBAL PIXEL BINNING FOR AMBIENT LIGHT SENSING

    公开(公告)号:US20190327405A1

    公开(公告)日:2019-10-24

    申请号:US15957335

    申请日:2018-04-19

    Abstract: An imaging system may comprise a plurality of pixels to selectively operate in a first operating mode or a second operating mode. When operating in the first operating mode, the plurality of pixels is binned during an exposure phase such that an output during a readout phase corresponds to a summed photocurrent that is a sum of a plurality of concurrent photocurrents, each corresponding to one of the plurality of pixels. When operating in the second operating mode, the plurality of pixels is not binned during the exposure phase such that an output during the readout phase corresponds to a set of separate photocurrents, each corresponding to one of a set of the plurality of pixels.

    SYSTEMS AND METHODS FOR TIME OF FLIGHT MEASUREMENT USING A SINGLE EXPOSURE
    20.
    发明申请
    SYSTEMS AND METHODS FOR TIME OF FLIGHT MEASUREMENT USING A SINGLE EXPOSURE 有权
    使用单次曝光进行飞行时间测量的系统和方法

    公开(公告)号:US20160327638A1

    公开(公告)日:2016-11-10

    申请号:US14703092

    申请日:2015-05-04

    CPC classification number: G01S7/4914 G01S17/36 G01S17/89

    Abstract: A sensor array arrangement for a time of flight measurement system is disclosed. The arrangement includes a plurality of pixels and circuitry. The plurality of pixels are configured such that a first plurality of pixels receive a first reference signal and a second plurality of pixels receive a second reference signal. The first and second reference signals are phase shifted with respect to each other. The circuitry calculates depth information by combining information from first and second pixel sensor signals. The first pixel sensor signal is based on the first reference signal. The second pixel sensor signal is based on the second reference signal.

    Abstract translation: 公开了一种用于飞行时间测量系统的传感器阵列装置。 该装置包括多个像素和电路。 多个像素被配置为使得第一多个像素接收第一参考信号,并且第二多个像素接收第二参考信号。 第一和第二参考信号相对于彼此相移。 该电路通过组合来自第一和第二像素传感器信号的信息来计算深度信息。 第一像素传感器信号基于第一参考信号。 第二像素传感器信号基于第二参考信号。

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