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    Multi-spectral image sensor
    1.
    发明授权
    Multi-spectral image sensor 有权

    公开(公告)号：US11756978B2

    公开(公告)日：2023-09-12

    申请号：US17184244

    申请日：2021-02-24

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Qing Chao ,  Xinqiao Liu

    IPC: H01L27/146

    CPC classification number: H01L27/14652 ,  H01L27/1462 ,  H01L27/14605

    Abstract: In some examples, an apparatus comprises: a first photodiode to sense a first component of light associated with a first wavelength, and a second photodiode configured to sense a second component of the light associated with a second wavelength, the first component and the second component being associated with, respectively, a first wavelength and a second wavelength. The apparatus further comprises a first optical structure and a second optical structure positioned over, respectively, the first photodiode and the second photodiode. The first optical structure is configured to increase a propagation path of the first component of the light within the first photodiode and has a first optical property based on the first wavelength. The second optical structure is configured to increase a propagation path of the second component of the light within the second photodiode, and has a second optical property based on the second wavelength.

    Image sensor post processing
    2.
    发明授权
    Image sensor post processing 有权

    公开(公告)号：US11595602B2

    公开(公告)日：2023-02-28

    申请号：US16672427

    申请日：2019-11-01

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Wei Gao ,  Andrew Samuel Berkovich ,  Song Chen ,  Tsung-Hsun Tsai ,  Xinqiao Liu

    IPC: H04N5/378 ,  H04N5/359

    Abstract: Methods and systems for quantizing a physical quantity, such as light, are provided. In one example, an apparatus comprises an analog-to-digital (A/D) converter configured to generate raw digital outputs based on performing at least one of: (1) a first quantization operation to quantize a physical stimulus within a first intensity range based on a first A/D conversion relationship, or (2) a second quantization operation to quantize the physical stimulus within a second intensity range based on a second A/D conversion relationship; and a raw output conversion circuit configured generate a refined digital output based on a raw digital output obtained from the A/D converter and at least one predetermined conversion parameter. The at least one conversion parameter compensates for a discontinuity between the first A/D conversion relationship and the second A/D conversion relationship.

    SYSTEMS AND METHODS FOR PERFORMING EYE-TRACKING
    3.
    发明申请
    SYSTEMS AND METHODS FOR PERFORMING EYE-TRACKING 有权

    公开(公告)号：US20230053497A1

    公开(公告)日：2023-02-23

    申请号：US17724302

    申请日：2022-04-19

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Syed Shakib Sarwar ,  Barbara De Salvo ,  Xinqiao Liu

    IPC: A61B3/113 ,  G06T7/246 ,  G06T7/70

    Abstract: The disclosed computer-implemented method may include (i) conditionally operating, at a first frequency, a first stage of an eye-tracking system processing pipeline that detects a region of interest and (ii) operating, at a second frequency that is substantially greater than the first frequency, a second stage of the eye-tracking system processing pipeline that predicts a gaze orientation based at least in part on the detected region of interest. Various other methods, systems, and computer-readable media are also disclosed.

    On-sensor image processor utilizing contextual data
    4.
    发明授权
    On-sensor image processor utilizing contextual data 有权

    公开(公告)号：US12244936B2

    公开(公告)日：2025-03-04

    申请号：US18148834

    申请日：2022-12-30

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Andrew Samuel Berkovich ,  Xinqiao Liu

    IPC: H04N23/84 ,  G02B27/01 ,  H01L27/146 ,  H04N25/772

    Abstract: In some examples, a sensor apparatus comprises: an array of pixel cells each including one or more photodiodes configured to generate a charge in response to light, and a charge storage device to convert the charge to output a voltage of an array of voltages, one or more an analog-to-digital converter (ADC) configured the convert the array of voltages to first pixel data, and an on-sensor controller configured to input the first pixel data into a machine-learning model to generate output data comprising prediction data associated with one or more features of the first pixel data, generate, based on the prediction data, second pixel data, the second pixel data associated with one or more transformed features of the first pixel data, and send, from the sensor apparatus to a separate receiving apparatus, the second pixel data.

    Digital image sensor using a single-input comparator based quantizer
    6.
    发明授权
    Digital image sensor using a single-input comparator based quantizer 有权

    公开(公告)号：US12022218B2

    公开(公告)日：2024-06-25

    申请号：US17554896

    申请日：2021-12-17

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Song Chen ,  Xinqiao Liu ,  Tsung-Hsun Tsai

    IPC: H04N25/75 ,  G06F3/14 ,  H04N25/771

    CPC classification number: H04N25/75 ,  G06F3/14 ,  H04N25/771

    Abstract: One example described herein includes the digital image sensor having a pixel cell with a photodiode and a quantizer circuit coupled to the pixel cell. The quantizer circuit includes a charge storage device that generates a voltage based on electric charge from the photodiode. The quantizer circuit also includes a single-input comparator that can switch from a first output state to a second output state in response to a ramp signal provided by a ramp generator. The quantizer circuit further includes a memory switch that can cause a counter value from a digital counter to be stored in a digital memory in response to the single-input comparator switching from the first output state to the second output state. The counter value can serve as a digital pixel value associated with the pixel cell.

    Pixel sensor having multiple photodiodes and shared comparator
    8.
    发明授权
    Pixel sensor having multiple photodiodes and shared comparator 有权

    公开(公告)号：US11956413B2

    公开(公告)日：2024-04-09

    申请号：US16550851

    申请日：2019-08-26

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Song Chen ,  Xinqiao Liu ,  Lyle David Bainbridge ,  Andrew Samuel Berkovich

    IPC: H04N5/355 ,  H04N5/378 ,  H04N13/286

    CPC classification number: H04N13/286 ,  H04N5/3559 ,  H04N5/378

    Abstract: In one example, an apparatus comprises: a first photodiode to generate a first charge; a second photodiode to generate a second charge; a quantizer; a first memory bank and a second memory bank; and a controller configured to: control the quantizer to perform a first quantization operation and a second quantization operation of the first charge to generate, respectively, a first digital output and a second digital output, the first and second quantization operations being associated with different intensity ranges; store one of the first digital output or the second digital output in the first memory bank; control the quantizer to perform a third quantization operation of the second charge to generate a third digital output, the third quantization operation being associated with a different intensity range from at least one of the first or second quantization operations; and store the third digital output in the second memory bank.

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