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    SENSING CIRCUIT WITH ENHANCED DYNAMIC RANGE AND ACCURACY
    1.
    发明公开
    SENSING CIRCUIT WITH ENHANCED DYNAMIC RANGE AND ACCURACY 审中-公开

    公开(公告)号：US20230282165A1

    公开(公告)日：2023-09-07

    申请号：US18117286

    申请日：2023-03-03

    Applicant: Apple Inc.

    Inventor： Hasan Akyol ,  Xuebei Yang

    IPC: G09G3/3233

    CPC classification number: G09G3/3233 ,  G09G2300/0819 ,  G09G2320/045

    Abstract: A sensing circuit includes at least a first gain stage and a controller for controlling the operation of the first gain stage. The first gain stage includes an amplifier having at least one input and one output, and a feedback loop coupled between the input and the output of the amplifier. The feedback loop includes a first capacitor coupled between the input and the output of the amplifier, and a second capacitor having a first terminal coupled to the input of the amplifier through a first switch and a second terminal coupled to the output of the amplifier through a second switch. The second capacitor is configured to be coupled in parallel to the first capacitor during a first portion of a measurement cycle, and disconnected from the first capacitor during a second portion of the measurement cycle.

    Enhanced smoothness digital-to-analog converter interpolation systems and methods
    2.
    发明授权
    Enhanced smoothness digital-to-analog converter interpolation systems and methods 有权

    公开(公告)号：US11651719B2

    公开(公告)日：2023-05-16

    申请号：US17376131

    申请日：2021-07-14

    Applicant: Apple Inc.

    Inventor： John T. Wetherell ,  Mahdi Farrokh Baroughi ,  Jaeyoung Kang ,  Shingo Hatanaka ,  Hasan Akyol ,  Hopil Bae

    IPC: G09G3/20

    CPC classification number: G09G3/2007 ,  G09G2320/0257 ,  G09G2320/0271 ,  G09G2320/0673 ,  G09G2330/021

    Abstract: An electronic device may include an electronic display panel having multiple display pixels for displaying an image based on analog voltage signals. The electronic device may also include interpolation circuitry to generate the analog voltage signals based on digital image data corresponding to the image. The interpolation circuitry may also receive analog reference voltages and interpolate between sets of the analog reference voltages to generate intermediate voltages, which may be a part of the analog voltage signals. Interpolating between the sets analog reference voltages may include performing a first level interpolation of a first set of the analog reference voltages to generate a first intermediate voltage and performing a second level interpolation of a second set of the analog reference voltages to generate a second intermediate voltage, wherein the first level interpolation is different from the second level interpolation.

    Reference array current sensing
    4.
    发明授权
    Reference array current sensing 有权

    公开(公告)号：US11626047B1

    公开(公告)日：2023-04-11

    申请号：US17405497

    申请日：2021-08-18

    Applicant: Apple Inc.

    Inventor： Shengchang Cai ,  Hasan Akyol ,  Xuebei Yang ,  Sheng Zhang

    IPC: G09G3/32 ,  G09G3/00

    Abstract: Embodiments disclosed herein provide systems and methods for testing and compensating for pixel degradation in an electronic display based on current and voltage values sensed in a reference array. An electronic display includes an active array, a reference array, and sensing circuitry. A compensation manager obtains current data values of the reference array from the sensing circuitry. The compensation manager generates a current-voltage curve based on the current data and adjusts the current-voltage curve to compensate for variations in temperature and/or pixel brightness. In this way, the compensation manager may improve performance of the electronic display by, for example, by reducing visible anomalies.

    Touch sensing utilizing integrated micro circuitry
    7.
    发明授权
    Touch sensing utilizing integrated micro circuitry 有权

    公开(公告)号：US11073927B2

    公开(公告)日：2021-07-27

    申请号：US16517513

    申请日：2019-07-19

    Applicant: Apple Inc.

    Inventor： Christian M. Sauer ,  Christoph H. Krah ,  Derek K. Shaeffer ,  Hasan Akyol ,  Henry C. Jen ,  Hopil Bae ,  John T. Wetherell ,  Thierry S. Divel ,  Xiang Lu

    IPC: G06F3/041 ,  G06F3/044 ,  G09G3/32 ,  H01L27/15

    Abstract: An integrated touchscreen can include light emitting diodes or organic light emitting diodes (LEDs/OLEDs), display chiplets and touch chiplets disposed in a visible area of the integrated touch screen. For example, the LEDs/OLEDs, display chiplets and touch chiplets can be placed on a substrate by a micro-transfer tool. The integrated touchscreen can also include electrodes disposed in the visible area of the integrated touch screen. The electrodes can be capable of providing display functionality via the one or more display chiplets during display operation (e.g., operating as cathode terminals of the LEDs during the display operation) and capable of providing touch functionality via the touch chiplets during touch operation (e.g., touch node electrodes can be formed from groups of the electrodes and sensed). In some examples, the touch node electrodes can be formed and coupled to touch chiplets via the display chiplets.

    Shared Components in Pulsed Electronic Displays
    8.
    发明申请
    Shared Components in Pulsed Electronic Displays 有权

    公开(公告)号：US20250095605A1

    公开(公告)日：2025-03-20

    申请号：US18625158

    申请日：2024-04-02

    Applicant: Apple Inc.

    Inventor： Baris Posat ,  John T. Wetherell ,  Hasan Akyol ,  Mahdi Farrokh Baroughi ,  Hopil Bae

    IPC: G09G5/00

    Abstract: Electronic displays may display a frame of image content by controlling emissions of display pixels. To this end, the electronic display may include one or more column drivers that drive the display pixels to emit light. The column drivers may be collectively compensated by common components, such as a single sampling capacitor and/or an analog buffer, which may reduce a size of the column drivers. In another example, the column drivers may include cascode transistors with increased width-to-length ratio and share a common n-well. Each transistor may be compensated by a respective capacitor, however a size of each sampling capacitor may be reduced, thereby reducing a size of the column driver. Moreover, a size of a level shifter may be reduced by operating transistors of the level shifter with sub-threshold voltage. Furthermore, a resolution of the electronic display may be improved by extending a pulse of an emission clock signal.

    Sensing circuit with enhanced dynamic range and accuracy
    9.
    发明授权
    Sensing circuit with enhanced dynamic range and accuracy 有权

    公开(公告)号：US11900879B2

    公开(公告)日：2024-02-13

    申请号：US18117286

    申请日：2023-03-03

    Applicant: Apple Inc.

    Inventor： Hasan Akyol ,  Xuebei Yang

    IPC: G09G3/3233

    CPC classification number: G09G3/3233 ,  G09G2300/0819 ,  G09G2320/045

    Abstract: A sensing circuit includes at least a first gain stage and a controller for controlling the operation of the first gain stage. The first gain stage includes an amplifier having at least one input and one output, and a feedback loop coupled between the input and the output of the amplifier. The feedback loop includes a first capacitor coupled between the input and the output of the amplifier, and a second capacitor having a first terminal coupled to the input of the amplifier through a first switch and a second terminal coupled to the output of the amplifier through a second switch. The second capacitor is configured to be coupled in parallel to the first capacitor during a first portion of a measurement cycle, and disconnected from the first capacitor during a second portion of the measurement cycle.

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