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    DISPLAY BACKLIGHTING SYSTEMS AND METHODS FOR ADAPTIVE PULSE WIDTH MODULATION AND MODULO PULSE WIDTH MODULATION
    11.
    发明申请
    DISPLAY BACKLIGHTING SYSTEMS AND METHODS FOR ADAPTIVE PULSE WIDTH MODULATION AND MODULO PULSE WIDTH MODULATION 审中-公开

    公开(公告)号：US20200380925A1

    公开(公告)日：2020-12-03

    申请号：US16836617

    申请日：2020-03-31

    Applicant: Apple Inc.

    Inventor： Vehbi Calayir ,  James E. Brown ,  Venkataraman V. Iyer ,  Bret Rothenberg

    IPC: G09G3/34 ,  G09G3/36

    Abstract: Aspects of the subject technology relate to an electronic device with a display. The display includes an array of light-emitting diodes. The array includes a plurality of subarrays of the light-emitting diodes. At least one driver circuit is coupled to the array of light-emitting diodes. The at least one driver circuit is configured to generate an adaptive pulse-width modulated (PWM) signal to control at least one subarray of the plurality of subarrays of the light-emitting diodes. The adaptive PWM signal is designed with each pulse of a group having a pulse width W, each pulse width being reduced until reaching a threshold pulse width, and one pulse being removed from the group of pulses.

    MITIGATION OF TEARING FROM INTRA-FRAME PAUSE
    14.
    发明申请
    MITIGATION OF TEARING FROM INTRA-FRAME PAUSE 有权

    公开(公告)号：US20230084423A1

    公开(公告)日：2023-03-16

    申请号：US17853649

    申请日：2022-06-29

    Applicant: Apple Inc.

    Inventor： Myungjoon Choi ,  Jie Won Ryu ,  Hyunwoo Nho ,  Xiaokai Li ,  Kaikai Guo ,  Szu-Hsien Lee ,  Rungrot Kitsomboonloha ,  Pei-En Chang ,  Amit Nayyar ,  Vehbi Calayir

    IPC: G09G3/20 ,  G06F3/041

    Abstract: Embodiments presented herein relate to reducing visual artifacts on an electronic display caused by an intra-frame pause. To do so, the intra-frame pause may be divided into smaller intra-frame pause segments. The intra-frame pause segments may be applied to the display during different image frames and/or at different locations on the electronic display. For example, each intra-frame pause segment may be applied to a different location on the electronic display. In some embodiments, multiple intra-frame pause segments may be applied during a single image frame. In some embodiments, the intra-frame pause segments may be applied to various image frames and at various location on the electronic display according to a pattern. To reduce band flickering that may be caused by the different locations of the intra-frame pause segments, an emission duty of one or more rows of pixels of the display may be adjusted.

    Mitigation of tearing from intra-frame pause
    15.
    发明授权
    Mitigation of tearing from intra-frame pause 有权

    公开(公告)号：US11605330B1

    公开(公告)日：2023-03-14

    申请号：US17853649

    申请日：2022-06-29

    Applicant: Apple Inc.

    Inventor： Myungjoon Choi ,  Jie Won Ryu ,  Hyunwoo Nho ,  Xiaokai Li ,  Kaikai Guo ,  Szu-Hsien Lee ,  Rungrot Kitsomboonloha ,  Pei-En Chang ,  Amit Nayyar ,  Vehbi Calayir

    IPC: G09G3/20 ,  G06F3/041

    Abstract: Embodiments presented herein relate to reducing visual artifacts on an electronic display caused by an intra-frame pause. To do so, the intra-frame pause may be divided into smaller intra-frame pause segments. The intra-frame pause segments may be applied to the display during different image frames and/or at different locations on the electronic display. For example, each intra-frame pause segment may be applied to a different location on the electronic display. In some embodiments, multiple intra-frame pause segments may be applied during a single image frame. In some embodiments, the intra-frame pause segments may be applied to various image frames and at various location on the electronic display according to a pattern. To reduce band flickering that may be caused by the different locations of the intra-frame pause segments, an emission duty of one or more rows of pixels of the display may be adjusted.

    ADAPTIVE HEADROOM ADJUSTMENT SYSTEMS AND METHODS FOR ELECTRONIC DEVICE DISPLAYS
    16.
    发明申请
    ADAPTIVE HEADROOM ADJUSTMENT SYSTEMS AND METHODS FOR ELECTRONIC DEVICE DISPLAYS 审中-公开

    公开(公告)号：US20200090599A1

    公开(公告)日：2020-03-19

    申请号：US16510635

    申请日：2019-07-12

    Applicant: Apple Inc.

    Inventor： Vehbi Calayir ,  James E. Brown

    IPC: G09G3/34 ,  G09G5/10 ,  G09G3/282

    Abstract: Aspects of the subject technology relate to control circuitry for light-emitting diodes. The control circuitry may include feedforward control and a feedback control for a power supply for the light-emitting diodes. The feedforward control may include host circuitry for the device that determines a maximum zone current, a maximum row current, and the maximum row-to-row current step for an upcoming backlight frame while a current backlight frame is being executed. A headroom voltage for the upcoming backlight frame is determined based on the maximum zone current, the maximum row current, and/or the maximum row-to-row current step and provided to the power supply so that the power supply can settle at a corresponding supply voltage before the upcoming backlight frame is executed. The feedback control utilizes dynamic thresholds determined for each backlight frame to fine tune the feedforward-determined headroom voltage.

    Tile passive matrix for display backlight systems
    18.
    发明授权
    Tile passive matrix for display backlight systems 有权

    公开(公告)号：US12131712B2

    公开(公告)日：2024-10-29

    申请号：US17980252

    申请日：2022-11-03

    Applicant: Apple Inc.

    Inventor： Vehbi Calayir ,  Youchul Jeong ,  Joshua D. Goldman

    IPC: G09G3/34

    CPC classification number: G09G3/3426 ,  G09G2320/0626 ,  G09G2360/145

    Abstract: Large sized electronic displays may include a backlight that generates light to illuminate a display panel. The backlight is divided into tiles that each includes a set of backlight elements that are driven by respective tile driver circuitry. Based on receiving brightness data and/or control signals from a backlight controller (BCON) of the backlight, the respective tile driver circuitry drives corresponding backlight elements such that the backlight elements suitably illuminate the display panel.

    Backlight systems and methods for electronic device displays
    20.
    发明授权
    Backlight systems and methods for electronic device displays 有权

    公开(公告)号：US11081070B2

    公开(公告)日：2021-08-03

    申请号：US16521324

    申请日：2019-07-24

    Applicant: Apple Inc.

    Inventor： Vehbi Calayir ,  Johan L. Piper

    IPC: G09G3/36 ,  H05B45/10

    Abstract: Aspects of the subject technology relate to control circuitry for light-emitting diodes (LEDs). The control circuitry may include an LED timing controller integrated circuit configured to receive data from host circuitry for an electronic device, an LED row driver integrated circuit, the LED row driver integrated circuit configured to connect a high voltage power rail to the light-emitting diodes via plurality of switches, and LED column driver integrated circuits each configured to adjust a current through at least one of the light-emitting diodes.

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