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    TOUCH INDUCED FLICKER MITIGATION FOR VARIABLE REFRESH RATE DISPLAY
    1.
    发明申请
    TOUCH INDUCED FLICKER MITIGATION FOR VARIABLE REFRESH RATE DISPLAY 审中-公开

    公开(公告)号：US20180059868A1

    公开(公告)日：2018-03-01

    申请号：US15650770

    申请日：2017-07-14

    Applicant: Apple Inc.

    Inventor： Kingsuk BRAHMA ,  Jie Won RYU ,  Hopil BAE ,  Yafei BI

    IPC: G06F3/041 ,  G02F1/1333 ,  G06F3/044

    CPC classification number: G06F3/0418 ,  G02F1/13338 ,  G06F3/0412 ,  G06F3/044 ,  G09G3/2022 ,  G09G5/003 ,  G09G2340/0435 ,  G09G2370/08

    Abstract: Touch induced flicker for variable refresh rate (VRR) displays can be reduced by adjusting one or more voltages. Synchronization of touch sensing operations after an immediate exit can introduce flicker issues into the VRR display. In some examples, the touched induced flicker can be reduced or eliminated by tuning the voltage on a common electrode (Vcom) to a tuning point that reduces a maximum error below a threshold, irrespective of refresh rate. In some examples, touch induced flicker can be reduced or eliminated by monitoring average Vcom, and when the change in average Vcom exceeds a threshold, Vcom can be adjusted to counteract the change in average Vcom due to the variable refresh rate and/or immediate exit. In some examples, touch induced flicker can be reduced or eliminated by applying a direct current (DC) pedestal to pixel gate lines during touch sensing scans.

    CHARGE PUMP HAVING AC AND DC OUTPUTS FOR TOUCH PANEL BOOTSTRAPPING AND SUBSTRATE BIASING
    4.
    发明申请
    CHARGE PUMP HAVING AC AND DC OUTPUTS FOR TOUCH PANEL BOOTSTRAPPING AND SUBSTRATE BIASING 有权
    具有触摸屏面板引导和基板偏移的交流和直流输出的充电泵

    公开(公告)号：US20160241139A1

    公开(公告)日：2016-08-18

    申请号：US15043405

    申请日：2016-02-12

    Applicant: Apple Inc.

    Inventor： Weijun YAO ,  David A. STRONKS ,  Hopil BAE ,  Kingsuk BRAHMA ,  Wei Hsin YAO ,  Yafei BI ,  Yingxuan LI

    IPC: H02M3/07 ,  G06F3/044 ,  G06F3/041

    CPC classification number: H02M3/07 ,  G06F1/3262 ,  G06F3/041 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/044 ,  H01L23/642

    Abstract: A charge pump that can be configured to operate in a first mode and a second mode is disclosed. The charge pump can comprise a charging capacitor coupled to a first node and configured to transfer a first DC voltage to the first node. The charge pump can also comprise a first output node and a second output node coupled to the first node. During the first mode, the first output node can be configured to output a second DC voltage based on the first DC voltage, and the second output node can be configured to output a third DC voltage based on the first DC voltage. During the second mode, the first output node can be configured to output the second DC voltage, and the second output node can be configured to output an AC voltage, the AC voltage being offset by the third DC voltage.

    Abstract translation: 公开了一种可被配置为在第一模式和第二模式下操作的电荷泵。 电荷泵可以包括耦合到第一节点并被配置为将第一DC电压传送到第一节点的充电电容器。 电荷泵还可以包括耦合到第一节点的第一输出节点和第二输出节点。 在第一模式期间，第一输出节点可以被配置为基于第一DC电压输出第二DC电压，并且第二输出节点可以被配置为基于第一DC电压输出第三DC电压。 在第二模式期间，第一输出节点可以被配置为输出第二DC电压，并且第二输出节点可以被配置为输出AC电压，AC电压被第三DC电压偏移。

    ON-CHIP CLOCK CALIBRATION SYSTEMS AND METHODS FOR ELECTRONIC DEVICE DISPLAYS
    5.
    发明申请
    ON-CHIP CLOCK CALIBRATION SYSTEMS AND METHODS FOR ELECTRONIC DEVICE DISPLAYS 审中-公开

    公开(公告)号：US20180061305A1

    公开(公告)日：2018-03-01

    申请号：US15367143

    申请日：2016-12-01

    Applicant: Apple Inc.

    Inventor： Haifeng LI ,  Kingsuk BRAHMA ,  Yafei BI

    IPC: G09G3/20 ,  G09G3/3208

    CPC classification number: G09G3/2092 ,  G09G3/20 ,  G09G2300/08 ,  G09G2310/061 ,  G09G2310/08 ,  G09G2320/0693

    Abstract: Aspects of the subject technology relate to electronic devices with displays. A display may include display control circuitry including an internal oscillator and one or more counters. The counters may be used to calibrate a display line time to a system line time to ensure that each displayed frame is synchronized with received display data frames from system circuitry for the electronic device. The counters may include a first counter that maintains a current-row count during operation of a current row of display pixels during a current display frame and a second counter that maintains a current-frame count that indicates a number of counts accumulated during the current display frame. The current-row count and the current-frame count may be referenced to the system line time during operation of each pixel row to remove any errors accumulated during operation of the previous pixel rows.

    VOLTAGE DISCHARGE OPTIMIZATION
    7.
    发明申请
    VOLTAGE DISCHARGE OPTIMIZATION 有权
    电压放电优化

    公开(公告)号：US20130229164A1

    公开(公告)日：2013-09-05

    申请号：US13632078

    申请日：2012-09-30

    Applicant: APPLE INC.

    Inventor： Ahmad AL-DAHLE ,  Yafei BI ,  Mir B. GHADERI ,  Wei H. YAO

    IPC: G05F5/00

    CPC classification number: G05F1/613

    Abstract: One embodiment of an apparatus to control and sense a voltage through a single node can include a comparator to monitor single node voltage, a transistor to discharge voltage through the single node and control logic. The control logic can have at least two operational phases when actively controlling the voltage through the single node. In a first phase, the control logic can configure the comparator to determine if the single node voltage is greater than a reference voltage. In a second phase, the control logic can configure the transistor to discharge voltage through the single node when the comparator has previously indicated that the single node voltage is greater than a reference voltage. The control logic can alternatively execute first and second phases to discharge the voltage to a predetermined level.

    Abstract translation: 用于控制和感测通过单个节点的电压的装置的一个实施例可包括监视单节点电压的比较器，通过单个节点放电电压的晶体管和控制逻辑。 当通过单个节点主动控制电压时，控制逻辑可以具有至少两个操作阶段。 在第一阶段中，控制逻辑可以配置比较器以确定单个节点电压是否大于参考电压。 在第二阶段中，当比较器先前已经指示单个节点电压大于参考电压时，控制逻辑可以配置晶体管以通过单个节点放电电压。 控制逻辑可替代地执行第一和第二阶段以将电压放电至预定水平。

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