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    Flicker detection using event-based readout circuits
    1.
    发明授权
    Flicker detection using event-based readout circuits 有权

    公开(公告)号：US12088925B1

    公开(公告)日：2024-09-10

    申请号：US17931883

    申请日：2022-09-13

    Applicant: Apple Inc.

    Inventor： Francesco Cannillo ,  Emanuele Mandelli

    IPC: H04N23/745 ,  H04N25/443 ,  H04N25/53 ,  H04N25/75 ,  H04N25/77

    CPC classification number: H04N23/745 ,  H04N25/443 ,  H04N25/53 ,  H04N25/75 ,  H04N25/77

    Abstract: An image capture device may include an image sensor having a plurality of light-sensitive pixel sensors to capture light from a scene for generating images and a flicker detection circuit to detect flicker in the light captured by the image sensor. The flicker detection circuit may include one or more event-based readout circuits and at least one event-based processing circuit. The event-based readout circuits may detect a series of events associated with the flicker in the light captured by the image sensor. The event-based processing circuit may determine a frequency of the flicker in the captured light based on the series of events detected by the event-based readout circuits. In some embodiments, the frequency may be used to adjust the exposure time of the image sensor, e.g., to identify intervals for exposure when the captured light is bright.

    Hardware implementation of sensor architecture with multiple power states
    3.
    发明授权
    Hardware implementation of sensor architecture with multiple power states 有权

    公开(公告)号：US11856305B2

    公开(公告)日：2023-12-26

    申请号：US17401385

    申请日：2021-08-13

    Applicant: APPLE INC.

    Inventor： Emanuele Mandelli ,  Walter Nistico

    IPC: H04N25/42 ,  H04N25/44 ,  H04N25/70

    CPC classification number: H04N25/42 ,  H04N25/44 ,  H04N25/70

    Abstract: In one implementation, an event sensor includes a plurality of pixels and an event compiler. The plurality of pixels are positioned to receive light from a scene disposed within a field of view of the event sensor. Each pixel is configured to have an operational state that is modified by control signals generated by a respective state circuit. The event compiler is configured to output a stream of pixel events. Each respective pixel event corresponds to a breach of a comparator threshold related to an intensity of incident illumination. Each control signal is generated based on feedback information that is received from an image pipeline configured to consume image data derived from the stream of pixel events.

    Sensor with low power synchronous readout
    6.
    发明授权
    Sensor with low power synchronous readout 有权

    公开(公告)号：US12155948B2

    公开(公告)日：2024-11-26

    申请号：US17774878

    申请日：2020-11-10

    Applicant: APPLE INC.

    Inventor： Nikolai E. Bock ,  Emanuele Mandelli ,  Gennady A. Manokhin

    IPC: H04N25/75 ,  H04N25/40 ,  H04N25/50 ,  H04N25/74 ,  H04N25/771

    Abstract: Various implementations disclosed herein include devices, systems, and methods that buffer events in device memory during synchronous readout of a plurality of frames by a sensor. Various implementations disclosed herein include devices, systems, and methods that disable a sensor communication link until the buffered events are sufficient for transmission by the sensor. In some implementations, the sensor using a synchronous readout may select a readout mode for one or more frames based on how many of the pixels are detecting events. In some implementations, a first mode that reads out only data for a low percentage of pixels that have events uses the device memory and a second mode bypasses the device memory based on accumulation criteria such as high percentage of pixels detecting events. In the second mode, less data per pixel may be readout.

    Pixel size reduction method for event driven sensors
    8.
    发明授权
    Pixel size reduction method for event driven sensors 有权

    公开(公告)号：US11910109B2

    公开(公告)日：2024-02-20

    申请号：US17376264

    申请日：2021-07-15

    Applicant: APPLE INC.

    Inventor： Nikolai E. Bock ,  Emanuele Mandelli ,  Dario Clocchiatti

    IPC: H04N25/50 ,  H04N25/75 ,  H04N25/77

    CPC classification number: H04N25/50 ,  H04N25/75 ,  H04N25/77

    Abstract: In one implementation, an event sensor includes a plurality of pixels, an external readout line shared among the plurality of pixels, and an external processing circuit. Each pixel is configured to output pixel data indicative of an intensity of incident illumination. The external processing circuit is configured to output a stream of pixel events. Each respective pixel event is generated when a comparator of the external processing circuit obtains a sample of pixel data from a particular pixel via the external readout line that breaches a threshold value.

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