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    Electrical Testing for Panel Characterization and Defect Screening
    21.
    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
    25.
    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.

    Systems and Methods for IR-Independent Pre-Charge and Inverter-Based IR Reduction
    29.
    发明申请
    Systems and Methods for IR-Independent Pre-Charge and Inverter-Based IR Reduction 有权

    公开(公告)号：US20250078731A1

    公开(公告)日：2025-03-06

    申请号：US18618916

    申请日：2024-03-27

    Applicant: Apple Inc.

    Inventor： Baris Posat ,  Rajesh Velayuthan ,  Hooman Torabi Parizi ,  Young Don Bae ,  Hasan Akyol

    IPC: G09G3/32

    Abstract: In an embodiment, an electronic display may include an electronic display panel that includes a plurality of display pixels configured to emit light; a first pre-charge voltage source; and a second pre-charge voltage source; and a microdriver that may include: a capacitor coupled at a first terminal to the first pre-charge voltage source and coupled at a second terminal to the second pre-charge voltage source; and a buffer. The buffer may include a positive input terminal coupled to the first pre-charge voltage source and the capacitor; an output terminal coupled to a plurality of driving circuits; and a negative input terminal coupled to the output terminal.

    Touch sensing utilizing integrated micro circuitry
    30.
    发明授权
    Touch sensing utilizing integrated micro circuitry 有权

    公开(公告)号：US12080201B2

    公开(公告)日：2024-09-03

    申请号：US18468654

    申请日：2023-09-15

    Applicant: Apple Inc.

    Inventor： Christian M. Sauer ,  Christoph H. Krah ,  Derek K. Shaeffer ,  Hasan Akyol ,  Henry C. Jen ,  John T. Wetherell

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

    CPC classification number: G09G3/32 ,  G06F3/0412 ,  G06F3/0418 ,  G06F3/044 ,  H01L27/156 ,  G09G2354/00

    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.

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