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    Fixed pattern noise compensation techniques for capacitive fingerprint sensors
    31.
    发明授权
    Fixed pattern noise compensation techniques for capacitive fingerprint sensors 有权

    公开(公告)号：US09939400B1

    公开(公告)日：2018-04-10

    申请号：US14481534

    申请日：2014-09-09

    Applicant: Apple Inc.

    Inventor： Giovanni Gozzini ,  Gordon S. Franza ,  Jean-Marie Bussat ,  Patrick J. Landy

    IPC: G01N27/22 ,  G06K9/00

    CPC classification number: G01N27/221 ,  G06K9/0002

    Abstract: A capacitive fingerprint sensor includes an array of capacitive sensing elements, readout circuitry electrically coupled to the array of capacitive sensing elements, a block first digital to analog converter (DAC), at least one second DAC, and at least one summing junction electrically coupled to the readout circuitry, the first DAC, and the at least one second DAC. The readout circuitry is adapted to read out pixel voltages from a group of each block of capacitive sensing elements. The first DAC is adapted to provide a block baseline voltage for each block of capacitive sensing elements. The second DAC is adapted to provide a pixel baseline voltage difference for one capacitive sensing element of each group of each block. The summing junction is adapted to subtract the received block baseline voltage and the received pixel baseline voltage difference from the corresponding pixel voltage of each row of each block.

    Electronic device including blurred finger image deblurring circuitry and related methods
    35.
    发明授权
    Electronic device including blurred finger image deblurring circuitry and related methods 有权
    电子设备包括模糊的手指图像去模糊电路和相关方法

    公开(公告)号：US09443125B2

    公开(公告)日：2016-09-13

    申请号：US14955930

    申请日：2015-12-01

    Applicant: APPLE INC.

    Inventor： Dale R. Setlak ,  Giovanni Gozzini ,  Martin Subert ,  Petr Kohout ,  Pavel Mrazek

    IPC: G06K9/00 ,  G06T5/00 ,  G06F3/041

    CPC classification number: G06K9/0002 ,  G06F3/041 ,  G06K9/00006 ,  G06K9/00033 ,  G06T5/003 ,  G06T5/20 ,  G06T2207/30196

    Abstract: An electronic device may include a finger biometric sensor that may include an array of electric field sensing pixels and image data output circuitry coupled thereto. The electronic device may also include a dielectric layer over the array of electric field sensing pixels and causing electric field diffusion so that the image data output circuitry generates image data corresponding to a blurred finger image. The electronic device may also include deblurring circuitry coupled to the image data output circuitry and capable of processing the image data to produce processed image data representative of a deblurred finger image.

    Abstract translation: 电子设备可以包括可以包括电场感测像素阵列和与其耦合的图像数据输出电路的手指生物测定传感器。 电子设备还可以包括电场感测像素阵列上的电介质层并引起电场扩散，使得图像数据输出电路产生对应于模糊的手指图像的图像数据。 电子设备还可以包括耦合到图像数据输出电路的去模糊电路，并且能够处理图像数据以产生表示去模糊的手指图像的经处理的图像数据。

    Active Sensing Element for Acoustic Imaging Systems
    36.
    发明申请
    Active Sensing Element for Acoustic Imaging Systems 有权
    声学成像系统的主动感应元件

    公开(公告)号：US20160092716A1

    公开(公告)日：2016-03-31

    申请号：US14823945

    申请日：2015-08-11

    Applicant: Apple Inc.

    Inventor： Mohammad Yeke Yazdandoost ,  Giovanni Gozzini ,  Jean-Marie Bussat

    IPC: G06K9/00

    CPC classification number: G06K9/0002

    Abstract: An acoustic fingerprint imaging system having a plurality of acoustic elements, each acoustic element including a transducer, and independent drive and sense circuitry is disclosed. Drive circuitry may require higher voltage than low voltage sense circuitry. Many embodiments described herein include a ground shifting controller to apply a voltage bias to the low voltage sense circuitry during a drive operation, in order to prevent electrical damage to the sense circuitry.

    Abstract translation: 具有多个声学元件的声学指纹成像系统，每个声学元件包括换能器，以及独立的驱动和感测电路。 驱动电路可能需要比低压检测电路更高的电压。 本文描述的许多实施例包括接地移位控制器，以在驱动操作期间向低电压感测电路施加电压偏置，以便防止对感测电路的电损坏。

    Reducing Edge Effects within Segmented Acoustic Imaging Systems
    37.
    发明申请
    Reducing Edge Effects within Segmented Acoustic Imaging Systems 有权
    在分段声学成像系统中降低边缘效应

    公开(公告)号：US20160092715A1

    公开(公告)日：2016-03-31

    申请号：US14823928

    申请日：2015-08-11

    Applicant: APPLE INC.

    Inventor： Mohammad Yeke Yazdandoost ,  Giovanni Gozzini ,  Jean-Marie Bussat

    IPC: G06K9/00

    CPC classification number: G06K9/0002

    Abstract: An acoustic imaging system can include an array of transducers in acoustic communication with a substrate configured to receive a subject for imaging. The transducers can independently or cooperatively send an acoustic pulse into the substrate toward the subject. In many examples, a number of adjacently-positioned transducers are activated substantially simultaneously so as to generate a plane wave into the substrate. After the plane wave has had an opportunity to propagate through the substrate, reflect from the top surface, and propagate through the substrate again, the electrical signals can be obtained from the transducers and an image of the subject can be assembled. In many embodiments, the plurality of transducers can be driven and read in groups such as non-intersecting (disjoint) sets or subarrays.

    Abstract translation: 声学成像系统可以包括与被配置为接收用于成像的对象的基板声学连通的换能器阵列。 换能器可以独立地或协同地向受试者发送声学脉冲到基底中。 在许多示例中，基本上同时激活多个相邻定位的换能器，以便在衬底中产生平面波。 在平面波已经有机会通过基板传播之后，从顶表面反射并再次传播通过基板，可以从换能器获得电信号，并且可以组装被摄体的图像。 在许多实施例中，可以以诸如不相交（不相交）集合或子阵列的组来驱动和读取多个换能器。

    ELECTRONIC DEVICE INCLUDING DEVICE GROUND COUPLED FINGER COUPLING ELECTRODE AND ARRAY SHIELDING ELECTRODE AND RELATED METHODS
    38.
    发明申请
    ELECTRONIC DEVICE INCLUDING DEVICE GROUND COUPLED FINGER COUPLING ELECTRODE AND ARRAY SHIELDING ELECTRODE AND RELATED METHODS 有权
    包括器件接地耦合电极和阵列屏蔽电极的电子器件及相关方法

    公开(公告)号：US20130314105A1

    公开(公告)日：2013-11-28

    申请号：US13886520

    申请日：2013-05-03

    Applicant: Apple Inc.

    Inventor： Dale R. Setlak ,  Giovanni Gozzini

    IPC: G01R27/26 ,  G01R3/00

    CPC classification number: G01R27/2605 ,  G01R3/00 ,  G06K9/0002 ,  G06K9/00053 ,  Y10T29/49204

    Abstract: An electronic device may include a housing and circuitry carried by the housing and having a device ground associated therewith. The electronic device may also include an array of biometric finger sensing pixel electrodes and an array shielding electrode outside the array of biometric finger sensing pixels. A finger coupling electrode may be outside the array shielding electrode and coupled to the device ground. The electronic device may also include drive circuitry capable of generating a drive signal for the array of biometric finger sensing pixel electrodes and a compensating drive signal for the array shielding electrode.

    Abstract translation: 电子设备可以包括由壳体承载并具有与其相关联的设备地面的壳体和电路。 电子设备还可以包括生物测定手指感测像素电极阵列和在生物测定手指感测像素阵列之外的阵列屏蔽电极。 手指耦合电极可以在阵列屏蔽电极之外并且耦合到器件地。 电子设备还可以包括能够产生生物测量手指感测像素电极阵列的驱动信号的驱动电路和阵列屏蔽电极的补偿驱动信号。

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