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    Dual-mode sense circuit with enhanced dynamic range and accuracy
    12.
    发明授权
    Dual-mode sense circuit with enhanced dynamic range and accuracy 有权

    公开(公告)号：US11620946B1

    公开(公告)日：2023-04-04

    申请号：US17686227

    申请日：2022-03-03

    Applicant: Apple Inc.

    Inventor： Hasan Akyol ,  Xuebei Yang

    IPC: G09G3/3233

    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
    13.
    发明申请
    ENHANCED SMOOTHNESS DIGITAL-TO-ANALOG CONVERTER INTERPOLATION SYSTEMS AND METHODS 有权

    公开(公告)号：US20220101772A1

    公开(公告)日：2022-03-31

    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

    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.

    Shared Components in Pulsed Electronic Displays
    19.
    发明申请
    Shared Components in Pulsed Electronic Displays 有权

    公开(公告)号：US20250095548A1

    公开(公告)日：2025-03-20

    申请号：US18625162

    申请日：2024-04-02

    Applicant: Apple Inc.

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

    IPC: G09G3/32 ,  G09G3/20

    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.

    DISPLAY PANEL VOLTAGE PROTECTION SCHEME
    20.
    发明申请
    DISPLAY PANEL VOLTAGE PROTECTION SCHEME 有权

    公开(公告)号：US20240420615A1

    公开(公告)日：2024-12-19

    申请号：US18660166

    申请日：2024-05-09

    Applicant: Apple Inc.

    Inventor： Hasan Akyol ,  Henry C. Jen ,  Stanley B. Wang ,  Baris Cagdaser ,  Rahul Shukla ,  John T. Wetherell ,  Bin Huang ,  Derek K. Shaeffer ,  Pablo Moreno Galbis ,  Johan L. Piper ,  Lawrence C. Tan ,  Adam Adjiwibawa ,  Manu Mishra

    IPC: G09G3/20

    Abstract: An electronic device may include a display panel and a display driver. The display panel may include multiple pixels each receiving a supply voltage and a respective data voltage to emit light. The display driver may include a low drop-out regulator (LDO) to provide the supply voltage to the pixels. The LDO may operate in a normal operation mode and a hard park mode. In the normal operation mode, the LDO may generate the supply voltage based on receiving a reference voltage and a bias voltage within a bias voltage range to operate in the normal operation mode. In the hard park mode, the LDO may become idle (e.g., shut-down mode) based on receiving a hard park mode voltages from dedicated replacement circuits. For example, including the dedicated reference voltage replacement circuit with the display driver may improve reliability and efficiency of the electronic device when de-energizing the LDO.

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