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    Display scan time compensation systems and methods
    1.
    发明授权
    Display scan time compensation systems and methods 有权

    公开(公告)号：US10916182B2

    公开(公告)日：2021-02-09

    申请号：US15711696

    申请日：2017-09-21

    申请人： Apple Inc.

    发明人： Sinan Alousi ,  Haifeng Li ,  Mohammad Hajirostam ,  Yafei Bi

    IPC分类号： G09G3/20 ,  G09G3/3208 ,  G09G3/36

    摘要： Systems and methods for improving perceived image quality of an electronic display communicatively coupled to an image data source that outputs a synchronization control signal, which indicates when an image frame is expected to stop being written, based on a source clock signal. The electronic display includes a display pixel row, a display driver, and a timing controller. The timing controller determines a target scan time to be used to write the image frame to the display pixel row and instructs the display driver to write the image frame to the display pixel row based on the target scan time and a display block signal, in which the timing controller instructs the display driver to continue writing the image frame to display pixel row after the electronic display receives the synchronization control signal when the synchronization control signal is received before the target scan time is reached.

    Collision avoidance schemes for displays
    2.
    发明授权
    Collision avoidance schemes for displays 有权

    公开(公告)号：US10825419B2

    公开(公告)日：2020-11-03

    申请号：US15716708

    申请日：2017-09-27

    申请人： Apple Inc.

    发明人： Yue Jack Chu ,  Christopher P. Tann ,  Arthur L. Spence ,  Brad W. Simeral ,  Yafei Bi ,  Jiayi Jin ,  Ruo-Gu Huang ,  Haifeng Li ,  Weijun Yao ,  Chaohao Wang

    IPC分类号： G06F3/14 ,  G09G5/00 ,  G06T1/60 ,  G09G5/36 ,  G09G5/395

    摘要： In situations with reduced image changes, display panels, such as the ones disclosed herein, may reduce their power consumption by performing self-refresh cycles, in which they may display locally stored data in the display panel instead of retrieving it from an image buffer. Methods and circuitry for management of the self-refresh cycle may reduce jitter, luminance errors, and/or flickers that may be caused by untimely self-refresh cycles that may occur as a result of latency in the image buffer. In some implementations, the display panel may have a dedicated low latency input that notifies an arrival of an incoming image. In some implementations, the self-refresh cycles of the panel may be managed by a host or a buffer that is responsible for sending the images.

    Noise reduction in LED sensing circuit for electronic display
    8.
    发明授权
    Noise reduction in LED sensing circuit for electronic display 有权

    公开(公告)号：US10460642B2

    公开(公告)日：2019-10-29

    申请号：US15199315

    申请日：2016-06-30

    申请人： APPLE INC.

    发明人： Hung Sheng Lin ,  Jiayi Jin ,  Wei H. Yao ,  Hyunwoo Nho ,  Guangmao Xing ,  Weijun Yao ,  Xiaofeng Wang ,  Yafei Bi ,  Haifeng Li

    IPC分类号： G09G3/20 ,  G09G3/3208 ,  G09G3/3233

    摘要： Systems, methods, and devices are provided to reduce noise present in sensing circuits used for calibrating light emitting diodes (e.g., organic light emitting diodes) in electronic display devices. Such a system may include a display that renders image data using self-emissive pixels. Values on the pixels may be sensed using a current source that outputs a current and a comparator that receives the current. The comparator changes states when a voltage signal output by the capacitor crosses a first threshold voltage or a second threshold voltage. A controller receives a first time when the comparator component changes states based on the voltage signal, receives a second time when the comparator component changes states based on the voltage signal, determines a current value based on the first time and the second time, and calibrates a pixel based on the current value.