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    Threshold voltage hysteresis compensation
    41.
    发明授权
    Threshold voltage hysteresis compensation 有权

    公开(公告)号：US10755640B2

    公开(公告)日：2020-08-25

    申请号：US15701030

    申请日：2017-09-11

    Applicant: Apple Inc.

    Inventor： Jiayi Jin ,  Paolo Sacchetto ,  Maofeng Yang ,  Weijun Yao

    IPC: G09G3/3258 ,  G09G3/20 ,  G09G3/3233

    Abstract: Electronic devices, storage medium containing instructions, and methods pertain to determining a target boosted threshold voltage level based at least in part on a target emission threshold voltage level. Using the determined target boosted threshold voltage level, a light emitting diode (LED)-controlling transistor is submitted to voltage stress to boost a threshold voltage of the transistor to the target boosted threshold voltage level during a first portion of a refresh period between first and second emission periods. During a second portion of the refresh period, the voltage stress is de-asserted to settle the threshold voltage to a target emission threshold voltage level for the second emission period. After the voltage is settled, the LED-controlling transistor is driven based at least in part on the target emission threshold voltage level.

    Electronic devices with displays
    42.
    发明授权
    Electronic devices with displays 有权

    公开(公告)号：US10726811B2

    公开(公告)日：2020-07-28

    申请号：US16326665

    申请日：2017-08-14

    Applicant: Apple Inc.

    Inventor： Sheng Zhang ,  Bennett S. Wilburn ,  Paolo Sacchetto ,  Chaohao Wang ,  Cheng Chen ,  Enkhamgalan Dorjgotov

    IPC: G09G5/36 ,  G06F3/147 ,  G09G5/10 ,  G09G3/3225

    Abstract: An electronic device may have a display such as an organic light-emitting diode display. Electronic devices may also include a number of sensors such as accelerometers and gaze detection sensors. A graphics processing unit (GPU) may render digital pixel values for pixels in the device display. Frames (F2) with long rendering times may cause latency. To reduce latency, an image frame may be displayed for an extended period of time (68) to wait for the subsequent frame (F2) to finish rendering. Once the subsequent image frame (F2) has finished rendering, the subsequent image frame may be displayed without delay. To increase the lifespan of the display, variable persistence may be used. Sensor data and other factors may be used to dynamically determine persistence for minimal motion blur and maximum display lifespan. Sensor data may also be used to determine refresh rates for different portions of the display.

    Common electrode driving and compensation for pixelated self-capacitance touch screen
    44.
    发明授权
    Common electrode driving and compensation for pixelated self-capacitance touch screen 有权

    公开(公告)号：US10534472B2

    公开(公告)日：2020-01-14

    申请号：US15687354

    申请日：2017-08-25

    Applicant: Apple Inc.

    Inventor： Chaohao Wang ,  Wonjae Choi ,  Paolo Sacchetto

    IPC: G06F3/044 ,  G06F3/041

    Abstract: A touch screen is disclosed. A plurality of common electrodes can be configured to operate as display circuitry during a display phase, and to operate as touch sensing circuitry during a touch sensing phase. The plurality of common electrodes can include a first common electrode associated with a first display pixel, and a second common electrode associated with a second display pixel. Circuitry can be configured to update the first display pixel at a first time while driving the first common electrode but not the second common electrode, and update the second display pixel at a second time, after the first time, while driving the second common electrode but not the first common electrode. In some examples, the circuitry can be configured to leave the second common electrode floating while driving the first common electrode, and leave the first common electrode floating while driving the second common electrode.

    Dynamic Image Stabilization Using Motion Sensors
    45.
    发明申请
    Dynamic Image Stabilization Using Motion Sensors 审中-公开

    公开(公告)号：US20190317659A1

    公开(公告)日：2019-10-17

    申请号：US16366503

    申请日：2019-03-27

    Applicant: Apple Inc.

    Inventor： Paul V. Johnson ,  Ahmad Rahmati ,  Chaohao Wang ,  Cheng Chen ,  Graham B. Myhre ,  Jiaying Wu ,  Paolo Sacchetto ,  Sheng Zhang ,  Yunhui Hou ,  Xiaokai Li ,  Tim H. Cornelissen

    IPC: G06F3/0484 ,  G06F3/01 ,  G06F3/0481

    Abstract: An electronic device may include a display for displaying image content to a user and dynamic image stabilization circuitry for dynamically compensating the image content if the device is moving unpredictably to help keep the image content aligned with the user's gaze. The electronic device may include sensors for detecting the displacement of the device. The dynamic image stabilization circuitry may include a usage scenario detection circuit and a content displacement compensation calculation circuit. The usage scenario detection circuit receives data from the sensors and infers a usage scenario based on the sensor data. The content displacement compensation calculation circuit uses the inferred usage scenario to compute a displacement amount by which to adjust image content. When motion stops, the image content may gradually drift back to the center of the display.

    Content-based VCOM driving
    46.
    发明授权
    Content-based VCOM driving 有权

    公开(公告)号：US10395611B2

    公开(公告)日：2019-08-27

    申请号：US15701001

    申请日：2017-09-11

    Applicant: Apple Inc.

    Inventor： Fenghua Zheng ,  Howard H. Tang ,  James C. Aamold ,  Sandro H. Pintz ,  Chaohao Wang ,  Paolo Sacchetto

    IPC: G09G3/20 ,  G09G3/36

    Abstract: Methods and systems for compensating for VCOM variations include determining a voltage change in pixels between frames to be displayed on an electronic display. Based on the determined voltage change, VCOM variation is calculated based on coupling the VCOM to one or more data lines of the electronic display. VCOM compensation is determined and applied to offset for the VCOM variation. Using the VCOM offset, subsequent pixel content for the one or more pixels is written using the compensated VCOM.

    Display With Pixel Dimming For Curved Edges
    48.
    发明申请
    Display With Pixel Dimming For Curved Edges 审中-公开

    公开(公告)号：US20190221177A1

    公开(公告)日：2019-07-18

    申请号：US16368394

    申请日：2019-03-28

    Applicant: Apple Inc.

    Inventor： Jiayi Jin ,  Myung-Je Cho ,  Paolo Sacchetto ,  Weijun Yao

    IPC: G09G3/36 ,  G09G3/20

    CPC classification number: G09G3/3607 ,  G09G3/20 ,  G09G2310/0232 ,  G09G2320/0285 ,  G09G2320/0626

    Abstract: A display may have curved edges such as rounded corners. Pixels in the display may be controlled so that the active area of the display has the desired curved edge shape. In order to maximize the apparent smoothness of the curved edge, the display may include circuitry that dims some of the pixels based on their location relative to a spline for the curved edge. The display circuitry may include a multiplication circuit that receives image data as a first input and dimming factors from a gain table as a second input. The image data may include a brightness level for each pixel in the array of pixels. The multiplication circuit may multiply the brightness level for each pixel by its respective dimming factor. This modified image data may then be supplied to the imaging pixels using display driver circuitry.

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