中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

12 records (took 0.019 seconds)

    Electrical Testing for Panel Characterization and Defect Screening
    3.
    发明申请
    Electrical Testing for Panel Characterization and Defect Screening 有权

    公开(公告)号：US20240402237A1

    公开(公告)日：2024-12-05

    申请号：US18656567

    申请日：2024-05-06

    Applicant: Apple Inc.

    Inventor： Xuebei Yang ,  Chung-Lun E Hsu ,  Cheuk Chi Lo ,  Hasan Akyol ,  Yingkan Lin ,  John T Wetherell ,  Han Zhao

    IPC: G01R31/26 ,  H01L21/66

    Abstract: Systems and methods are provided for electrical testing to supplement or replace optical testing of an electronic display. Internal testing circuitry that includes analog front end (AFE) and analog-to-digital converter (ADC) circuitry may be included in the electronic display and may be used either alone or in combination with other testing devices to perform electrical characterization and defect screening. The electrical characterization and defect screening may be performed before or after self-emissive elements such as light-emitting diodes are installed, further improving yield. Types of electrical characterization and defect screening may include a partial passive mode electrical characterization of OLEDs, vertical or horizontal crosstalk measurement, scan line integrity testing, pixel bright dot testing, display pixel defect detection, and delayed defect detection for defects that may occur after some extended period of time (e.g., after several minutes, after several hours).

    ON-CHIP TESTING ARCHITECTURE FOR DISPLAY SYSTEM
    4.
    发明申请
    ON-CHIP TESTING ARCHITECTURE FOR DISPLAY SYSTEM 有权

    公开(公告)号：US20220076599A1

    公开(公告)日：2022-03-10

    申请号：US17397953

    申请日：2021-08-09

    Applicant: Apple Inc.

    Inventor： Hasan Akyol ,  Xuebei Yang ,  Chung-Lun Edwin Hsu ,  Henry C. Jen ,  John T. Wetherell

    IPC: G09G3/00

    Abstract: Embodiments disclosed herein provide systems and methods for testing and repairing various aspects of an electronic display. The electronic display includes a reference array and an active array. The electronic display also includes test circuitry used to test individual or any combination of pixels of the electronic display. Switches may be disposed between the pixels and the test circuitry to be to repair the various components of the electronic display.

    SENSING CIRCUIT WITH ENHANCED DYNAMIC RANGE AND ACCURACY
    5.
    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.

    Reference array current sensing
    7.
    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.

    SENSING CIRCUIT WITH ENHANCED DYNAMIC RANGE AND ACCURACY
    9.
    发明公开
    SENSING CIRCUIT WITH ENHANCED DYNAMIC RANGE AND ACCURACY 审中-公开

    公开(公告)号：US20240161697A1

    公开(公告)日：2024-05-16

    申请号：US18405798

    申请日：2024-01-05

    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.

    Sensing circuit with enhanced dynamic range and accuracy
    10.
    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.

Patent Agency Ranking