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    DISPLAY FLICKER REDUCTION SYSTEMS AND METHODS
    81.
    发明申请
    DISPLAY FLICKER REDUCTION SYSTEMS AND METHODS 有权

    公开(公告)号：US20180075801A1

    公开(公告)日：2018-03-15

    申请号：US15404139

    申请日：2017-01-11

    Applicant: Apple Inc.

    Inventor： Chengrui LE ,  Chaohao Wang ,  Kingsuk Brahma ,  Jie Won Ryu ,  Chin-Wei Lin ,  Rui Zhang

    IPC: G09G3/3233 ,  G09G3/3258

    Abstract: Aspects of the subject technology relate to electronic devices with displays. A display may include an array of display pixels each having a drive transistor and an organic light-emitting diode. A pulse-width-modulated current may be provided to the organic light-emitting diode during each display frame to compensate for an on-bias compensation applied to the drive transistor between display frames. The pulse-width-modulated current may be provided with a pulse-width-modulation ratio that decreases over the course of each display frame. The decrease of the pulse-width-modulation ratio for each display frame may be determined based on a peak luminance for that display frame. The reduction in flicker provided by the pulse-width-modulated current may facilitate operation of the display with a reduced refresh rate, thereby reducing power consumption by the display.

    Systems and methods for external off-time pixel sensing
    82.
    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.

    GLOBAL NONLINEAR SCALER FOR MULTIPLE PIXEL GAMMA RESPONSE COMPENSATION
    85.
    发明公开
    GLOBAL NONLINEAR SCALER FOR MULTIPLE PIXEL GAMMA RESPONSE COMPENSATION 审中-公开

    公开(公告)号：US20240203332A1

    公开(公告)日：2024-06-20

    申请号：US18509592

    申请日：2023-11-15

    Applicant: Apple Inc.

    Inventor： Mario Miscuglio ,  Kingsuk Brahma ,  Jie Won Ryu ,  Shengkui Gao ,  Yuchi Che ,  Graeme M Williams ,  Yi Qiao ,  Wei H Yao ,  Jean-Pierre S Guillou

    IPC: G09G3/3208 ,  G09G3/32

    CPC classification number: G09G3/3208 ,  G09G3/32 ,  G09G2300/0828 ,  G09G2320/0276

    Abstract: In a display characterized by regions with different pixel responses due, for example, to local pixel density variation, voltage-to-luminance matching may be non-universal. Therefore, in order to avoid visual artifacts that may hinder a desired visualization of displayed content, it may be advantageous to compensate the different gamma responses. In some cases, such as with electronic devices having a single pixel density across the display, optical calibration may be performed to determine voltage-to-luminance matching. However, in electronic devices with local pixel density variations, it may be disadvantageous to perform optical calibrations for each region with a different pixel density. Instead of using two distinct gamma curves which may include dedicated optical calibration, a global nonlinear scaler (GNLS) compensation may be applied. Embodiments may pertain to techniques for applying a per-channel and band-global gamma-to-voltage compensation to reduce or minimize a relative luminance error amongst different responses of display regions.

    Systems and methods for performing in-frame cleaning
    89.
    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.

    Noise compensation for displays with non-rectangular borders
    90.
    发明授权
    Noise compensation for displays with non-rectangular borders 有权

    公开(公告)号：US11100839B2

    公开(公告)日：2021-08-24

    申请号：US16746288

    申请日：2020-01-17

    Applicant: Apple Inc.

    Inventor： Shinya Ono ,  Chin-Wei Lin ,  Jie Won Ryu

    IPC: G09G5/00 ,  G09G3/20

    Abstract: The present disclosure relates to an electronic device that includes a display that has a plurality of scan lines. The display also includes a first data line that has a first number of pixels. The first data line forms a first number of crossovers with the plurality of scan lines. Additionally, the display includes a second data line that has a second number of pixels that is different than the first number of pixels. The second data line forms a second number of crossovers with the plurality of scan lines that is equal to the first number of crossovers.

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