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    REDUCED POWER DISPLAY POWER MANAGEMENT INTEGRATED CIRCUIT
    2.
    发明申请
    REDUCED POWER DISPLAY POWER MANAGEMENT INTEGRATED CIRCUIT 有权

    公开(公告)号：US20250095540A1

    公开(公告)日：2025-03-20

    申请号：US18815162

    申请日：2024-08-26

    Applicant: Apple Inc.

    Inventor： Vehbi Calayir ,  Weimin Zhang ,  Bret Rothenberg ,  Zhongyuan Ren ,  Fenghua Zheng ,  Mohammad Reza Esmaeili Rad

    IPC: G09G3/20

    Abstract: A power management integrated circuit (PMIC) of an electronic display may include image data reference voltage adjustment circuitry, a negative supply voltage generator that may generate a negative supply voltage with multiple negative supply voltages, and/or a dedicated timing controller. The image data reference voltage adjustment circuitry may tune image data reference voltages for generating programming voltages based on receiving an indication of an undesired direct current (DC) voltage offset, an undesired alternating current (AC) noise, or both. The image data reference voltage adjustment circuitry may receive the indication from a display panel of the electronic display. The negative supply voltage generator may elevate a voltage of the negative supply voltage to reduce a power consumption of the electronic display. The dedicated timing controller may improve (e.g., reduce length of) a frequency range of one or more switched voltages of the PMIC to reduce front of screen artifacts.

    Display backlighting systems and methods for adaptive pulse width modulation and modulo pulse width modulation
    4.
    发明授权
    Display backlighting systems and methods for adaptive pulse width modulation and modulo pulse width modulation 有权

    公开(公告)号：US11145260B2

    公开(公告)日：2021-10-12

    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: G09G3/36 ,  G09G3/34

    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.

    DISPLAY BACKLIGHTING SYSTEMS WITH CANCELLATION ARCHITECTURE FOR CANCELING GHOSTING PHENOMENA
    5.
    发明申请
    DISPLAY BACKLIGHTING SYSTEMS WITH CANCELLATION ARCHITECTURE FOR CANCELING GHOSTING PHENOMENA 有权

    公开(公告)号：US20210018795A1

    公开(公告)日：2021-01-21

    申请号：US16897100

    申请日：2020-06-09

    Applicant: Apple Inc.

    Inventor： Vehbi Calayir ,  James E. Brown ,  Bret Rothenberg

    IPC: G02F1/13357 ,  H05B45/325 ,  H05B45/3725 ,  H05B45/10

    Abstract: Aspects of the subject technology relate to an electronic device with a display. The display includes a first array of light-emitting diodes of a backlight unit to generate backlight for the display with each LED including an anode and a cathode. A first switch selectively couples a power supply voltage to a common anode of the first array of LEDs to control illumination of the first array of LEDs. A first discharge switch selectively couples a first voltage level to the common anode of the first array of LEDs to discharge the common anode to prevent an undesired current path through the first array of LEDs and associated undesired illumination.

    DISPLAY BACKLIGHTING SYSTEMS AND METHODS FOR ADAPTIVE PULSE WIDTH MODULATION AND MODULO PULSE WIDTH MODULATION
    6.
    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.

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