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    Noise reduction in LED sensing circuit for electronic display
    23.
    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

    Applicant: APPLE INC.

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

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

    Abstract: 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.

    Electronic Device Display with Real-Time Mode Switching
    27.
    发明公开
    Electronic Device Display with Real-Time Mode Switching 审中-公开

    公开(公告)号：US20240363052A1

    公开(公告)日：2024-10-31

    申请号：US18683940

    申请日：2022-08-12

    Applicant: Apple Inc.

    Inventor： Xiaofeng Wang ,  Yafei Bi

    IPC: G09G3/20

    CPC classification number: G09G3/2096 ,  G09G2330/026 ,  G09G2330/027 ,  G09G2370/00

    Abstract: An electronic device may include a display, a display driver integrated circuit for controlling the display, and a system processor for running one or more applications on the electronic device. The display may be operated in at least a video mode and a command mode. In the video mode, the system processor operates as the primary timing circuit while the display driver integrated circuit operates as the secondary timing circuit. In the command mode, the display driver integrate circuit operates as the primary timing circuit while the system processor operates as the secondary timing circuit. The system processor may be configured to switch between video mode and the command mode without turning off the electronic device and without turning off the display driver integrated circuit. If desired, the display can be temporarily turned off during a mode switching event to hide potential front of screen artifacts.

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