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    DEVICES AND METHODS FOR REDUCING OR ELIMINATING MURA ARTIFACT USING DAC BASED TECHNIQUES
    101.
    发明申请
    DEVICES AND METHODS FOR REDUCING OR ELIMINATING MURA ARTIFACT USING DAC BASED TECHNIQUES 有权
    使用基于DAC的技术减少或消除MURA ARTIFACT的设备和方法

    公开(公告)号：US20150332638A1

    公开(公告)日：2015-11-19

    申请号：US14276146

    申请日：2014-05-13

    Applicant: APPLE INC.

    Inventor： Yingxuan Li ,  Weijun Yao ,  Wei H. Yao ,  Kingsuk Brahma ,  Hyunwoo Nho

    IPC: G09G3/36

    CPC classification number: G09G3/3688 ,  G09G3/3648 ,  G09G3/3655 ,  G09G3/3696 ,  G09G2300/0426 ,  G09G2310/027 ,  G09G2310/0291 ,  G09G2320/0233 ,  G09G2320/0276 ,  G09G2320/029

    Abstract: Devices and methods for reducing or eliminating image artifacts are provided. By way of example, a display panel includes a pixels including pixel electrodes configured to receive an image data signal, and common electrodes (VCOMs) configured to receive a common voltage signal. The display panel includes a source driver, which includes a first digital to analog converter (DAC) configured to generate a gamma voltage signal to provide a first adjustment to the image data signal, and a second DAC configured to generate an error correction voltage signal to provide a second adjustment to the image data signal. The second adjustment is configured to adjust the image data signal to compensate for an operational characteristic difference between row pixels and column pixels of the display panel. The source driver includes an output buffer to supply the image data signal to the pixel electrodes.

    Abstract translation: 提供了用于减少或消除图像伪像的设备和方法。 作为示例，显示面板包括被配置为接收图像数据信号的像素电极的像素和被配置为接收公共电压信号的公共电极（VCOM）。 显示面板包括源驱动器，其包括被配置为产生伽马电压信号以对图像数据信号提供第一调整的第一数模转换器（DAC）和被配置为产生纠错电压信号的第二DAC 对图像数据信号提供第二调整。 第二调整被配置为调整图像数据信号以补偿显示面板的行像素和列像素之间的操作特性差异。 源极驱动器包括用于将图像数据信号提供给像素电极的输出缓冲器。

    Systems and methods for external off-time pixel sensing
    102.
    发明授权
    Systems and methods for external off-time pixel sensing 有权

    公开(公告)号：US12136394B2

    公开(公告)日：2024-11-05

    申请号：US16802354

    申请日：2020-02-26

    Applicant: Apple Inc.

    Inventor： Hyunwoo Nho ,  Myungjoon Choi ,  Hyunsoo Kim ,  Mohammad Ali Jangda ,  Jie Won Ryu ,  Shiping Shen ,  Kingsuk Brahma ,  Chaohao Wang ,  Wei H. Yao ,  Alex H. Pai

    IPC: G09G3/3258 ,  G09G3/3233

    Abstract: An electronic device includes a display having multiple regions of pixels. Each pixel includes a diode that emits light based on an amount of current through the diode and a transistor that controls the amount of current flowing through the diode. The electronic device includes driver-integrated circuitry that reduces hysteresis in a first transistor of a first pixel of a region of pixels, settles a threshold voltage of the first transistor, applies a test voltage to the first transistor, and senses a current across the first transistor. The electronic device includes processing circuitry that determines a predetermined voltage based on the current and a predetermined current-voltage relationship determined at an initial temperature, determines a voltage difference between the test voltage and the predetermined voltage, and applies the predetermined voltage and the voltage difference to a second transistor of a second pixel of the region of pixels.

    Systems and methods for performing in-frame cleaning
    107.
    发明授权
    Systems and methods for performing in-frame cleaning 有权

    公开(公告)号：US11227536B2

    公开(公告)日：2022-01-18

    申请号：US16746325

    申请日：2020-01-17

    Applicant: Apple Inc.

    Inventor： Xin Lin ,  Yun Wang ,  Chin-Wei Lin ,  Majid Gharghi ,  Fan Gui ,  Chen-Ming Chen ,  Jie Won Ryu ,  Hyunwoo Nho ,  Alex H. Pai ,  Kingsuk Brahma ,  Junhua Tan ,  Szu Heng Tseng

    IPC: G09G3/30 ,  G09G3/32 ,  G09G3/20

    Abstract: A system includes an electronic display panel that has a plurality of pixels configured to depict frames of image data. The electronic display also includes display driver circuitry configured to, for a first frame of image data representing first image content, modify a gate-to-source voltage of a transistor of a first pixel of the plurality of pixels to a content-dependent first gate-to-source voltage. Additionally, after modifying the gate-to-source voltage to the first gate-to-source voltage, the display driver circuitry is configured to program the first pixel by modifying the gate-to-source voltage to a gate-to-source programming voltage that differs from the first gate-to-source voltage and is based on image data associated with the pixel from the first frame of the image data. Furthermore, the display driver circuitry is configured to cause the plurality of pixels to emit light.

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