Timestamp based display update mechanism

    公开(公告)号:US10706825B2

    公开(公告)日:2020-07-07

    申请号:US14869148

    申请日:2015-09-29

    Applicant: Apple Inc.

    Abstract: Systems, apparatuses, and methods for implementing a timestamp based display update mechanism. A display control unit includes a timestamp queue for storing timestamps, wherein each timestamp indicates when a corresponding frame configuration set should be fetched from memory. At pre-defined intervals, the display control unit may compare the timestamp of the topmost entry of the timestamp queue to a global timer value. If the timestamp is earlier than the global timer value, the display control unit may pop the timestamp entry and fetch the frame next configuration set from memory. The display control unit may then apply the updates of the frame configuration set to its pixel processing elements. After applying the updates, the display control unit may fetch and process the source pixel data and then drive the pixels of the next frame to the display.

    Controlling Display Performance Using Display System Hints

    公开(公告)号:US20170352323A1

    公开(公告)日:2017-12-07

    申请号:US15274639

    申请日:2016-09-23

    Applicant: Apple Inc.

    Abstract: Embodiments provide for a display system to generate and display data on a display device, the display system comprising one or more graphics processors to generate one or more frames of data for display on the display device; a display engine to present the one or more frames of data to the display device for display; display logic to receive a request to display the one or more frames of data and generate one or more display events for the display engine based on the request, wherein the request includes a first hint to indicate a complexity of the one or more frames of data and the one or more display events includes a second hint derived from the first hint; and a performance controller to adjust one or more performance related parameters for the display system based on the second hint.

    Variable Refresh Rate Display Synchronization

    公开(公告)号:US20170193971A1

    公开(公告)日:2017-07-06

    申请号:US15271085

    申请日:2016-09-20

    Applicant: Apple Inc.

    Abstract: Systems and methods for synchronizing a video source and display circuitry using a dynamic tearing effect (TE) signal are provided. In one embodiment, an electronic display device includes: variable refresh rate circuitry that, when no new frame data is provided to the electronic display device, extends a vertical blanking period and reduces a refresh rate of the electronic display device. A tearing effect signal is generated, which is selectively set to a first logical level at a first period of time and a second logical level at a second period of time. The tearing effect signal is provided to the host electronic device that provides frame data to the electronic display device and upon receipt of new frame data, an un-extended vertical blanking period is returned to and the frame data at the next frame boundary is displayed.

    TIMESTAMP BASED DISPLAY UPDATE MECHANISM
    25.
    发明申请

    公开(公告)号:US20170092236A1

    公开(公告)日:2017-03-30

    申请号:US14869148

    申请日:2015-09-29

    Applicant: Apple Inc.

    Abstract: Systems, apparatuses, and methods for implementing a timestamp based display update mechanism. A display control unit includes a timestamp queue for storing timestamps, wherein each timestamp indicates when a corresponding frame configuration set should be fetched from memory. At pre-defined intervals, the display control unit may compare the timestamp of the topmost entry of the timestamp queue to a global timer value. If the timestamp is earlier than the global timer value, the display control unit may pop the timestamp entry and fetch the frame next configuration set from memory. The display control unit may then apply the updates of the frame configuration set to its pixel processing elements. After applying the updates, the display control unit may fetch and process the source pixel data and then drive the pixels of the next frame to the display.

    Preemptive refresh for reduced display judder

    公开(公告)号:US11615727B2

    公开(公告)日:2023-03-28

    申请号:US17680103

    申请日:2022-02-24

    Applicant: Apple Inc.

    Abstract: In an embodiment, an electronic device includes an electronic display. The electronic display provides a programmable latency period in response to receiving a first image frame corresponding to first image frame data. The electronic display also displays the first image frame after the programmable latency period and during display of the first image frame, receives a second image frame corresponding to second image frame data. The electronic display also repeats display of the first image frame in response to receiving the second image frame.

    Timestamp based display update mechanism

    公开(公告)号:US11211036B2

    公开(公告)日:2021-12-28

    申请号:US16919495

    申请日:2020-07-02

    Applicant: Apple Inc.

    Abstract: Systems, apparatuses, and methods for implementing a timestamp based display update mechanism. A display control unit includes a timestamp queue for storing timestamps, wherein each timestamp indicates when a corresponding frame configuration set should be fetched from memory. At pre-defined intervals, the display control unit may compare the timestamp of the topmost entry of the timestamp queue to a global timer value. If the timestamp is earlier than the global timer value, the display control unit may pop the timestamp entry and fetch the frame next configuration set from memory. The display control unit may then apply the updates of the frame configuration set to its pixel processing elements. After applying the updates, the display control unit may fetch and process the source pixel data and then drive the pixels of the next frame to the display.

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