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    System and method for voltage and current sensing for compensation in an electronic display via analog front end
    11.
    发明授权
    System and method for voltage and current sensing for compensation in an electronic display via analog front end 有权

    公开(公告)号：US10388223B2

    公开(公告)日：2019-08-20

    申请号：US15275371

    申请日：2016-09-24

    Applicant: Apple Inc.

    Inventor： Kingsuk Brahma ,  Mohammad B. Vahid Far

    IPC: G09G3/3258 ,  G09G3/3233 ,  H03M1/34 ,  H03M1/50

    Abstract: An electronic device includes display circuitry with a source amplifier and a data line that drives signals provided by the source amplifier. Additionally, the display circuitry includes pixels, where each pixel includes a diode, and a scan thin-film-transistor (TFT) that selectively couples the pixels with the data line, based upon a scan control signal. Sensing circuitry of the electronic device includes a capacitor that is electrically coupled to the data line, wherein the capacitor is pre-charged by the source amplifier when the scan TFT is OFF and a sensing amplifier electrically coupled to the data line, providing a sensing output of both a diode voltage of the one or more pixels and a driving current of the one or more pixels, depending on the current operation of the sensing circuitry. Further, conversion circuitry converts the sensing output from an analog domain to a digital domain.

    High Frame Rate Display
    12.
    发明申请
    High Frame Rate Display 审中-公开

    公开(公告)号：US20190088207A1

    公开(公告)日：2019-03-21

    申请号：US16134802

    申请日：2018-09-18

    Applicant: Apple Inc.

    Inventor： Chin-Wei Lin ,  Majid Gharghi ,  Mohammad Reza Esmaeili Rad ,  Yun Wang ,  Jie Won Ryu ,  Kingsuk Brahma ,  Shingo Hatanaka ,  Shinya Ono ,  Ting-Kuo Chang

    IPC: G09G3/3266 ,  G09G3/3233

    Abstract: A display may have rows and columns of pixels. Gate lines may be used to supply gate signals to rows of the pixels. Data lines may be used to supply data signals to columns of the pixels. The data lines may include alternating even and odd data lines. Data lines may be organized in pairs each of which includes one of the odd data lines and an adjacent one of the even data lines. Demultiplexer circuitry may be configured dynamically during data loading and pixel sensing operations. During data loading, data from display driver circuitry may be supplied, alternately to odd pairs of the data lines and even pairs of the data lines. During sensing, the demultiplexer circuitry may couple a pair of the even data lines to sensing circuitry in the display driver circuitry and then may couple a pair of the odd data lines to the sensing circuitry.

    Reconfigurable circuit topology for both self-capacitance and mutual capacitance sensing
    13.
    发明授权
    Reconfigurable circuit topology for both self-capacitance and mutual capacitance sensing 有权

    公开(公告)号：US09933879B2

    公开(公告)日：2018-04-03

    申请号：US14089418

    申请日：2013-11-25

    Applicant: Apple Inc.

    Inventor： Weijun Yao ,  Kingsuk Brahma ,  Taif A. Syed

    IPC: G06F3/041 ,  G06F3/044

    CPC classification number: G06F3/0416 ,  G06F3/044 ,  G06F2203/04106

    Abstract: A touch sensor panel configured to switch between a mutual capacitance touch sensing architecture and a self-capacitance touch sensing architecture is provided. The touch sensor panel includes circuitry that can switch the configuration of touch electrodes to act as either drive lines in a mutual capacitance configuration or as sense electrodes in a self-capacitance configuration. The touch sensor panel also includes circuitry that can switch the configuration of touch electrodes to act as either sense lines in a mutual capacitance configuration or as sense electrode in a self-capacitance configuration. By splitting a self-capacitance touch mode into a drive line self-capacitive mode and sense line self-capacitive mode, the touch sensor panel is able to reuse components thus requiring less space, weight and power.

    DISPLAY FLICKER REDUCTION SYSTEMS AND METHODS
    16.
    发明申请
    DISPLAY FLICKER REDUCTION SYSTEMS AND METHODS 有权

    公开(公告)号：US20180075801A1

    公开(公告)日：2018-03-15

    申请号：US15404139

    申请日：2017-01-11

    Applicant: Apple Inc.

    Inventor： Chengrui LE ,  Chaohao Wang ,  Kingsuk Brahma ,  Jie Won Ryu ,  Chin-Wei Lin ,  Rui Zhang

    IPC: G09G3/3233 ,  G09G3/3258

    Abstract: Aspects of the subject technology relate to electronic devices with displays. A display may include an array of display pixels each having a drive transistor and an organic light-emitting diode. A pulse-width-modulated current may be provided to the organic light-emitting diode during each display frame to compensate for an on-bias compensation applied to the drive transistor between display frames. The pulse-width-modulated current may be provided with a pulse-width-modulation ratio that decreases over the course of each display frame. The decrease of the pulse-width-modulation ratio for each display frame may be determined based on a peak luminance for that display frame. The reduction in flicker provided by the pulse-width-modulated current may facilitate operation of the display with a reduced refresh rate, thereby reducing power consumption by the display.

    Displays with High Impedance Gate Driver Circuitry
    17.
    发明申请
    Displays with High Impedance Gate Driver Circuitry 有权
    具有高阻抗栅极驱动器电路的显示器

    公开(公告)号：US20160275889A1

    公开(公告)日：2016-09-22

    申请号：US14864136

    申请日：2015-09-24

    Applicant: Apple Inc.

    Inventor： Cheng-Ho Yu ,  Keitaro Yamashita ,  Ting-Kuo Chang ,  Yun Wang ,  Hopil Bae ,  Kingsuk Brahma

    IPC: G09G3/36 ,  G06F3/041

    CPC classification number: G09G3/3648 ,  G06F3/0412 ,  G06F3/0416 ,  G09G3/3677 ,  G09G2300/0452 ,  G09G2300/0871 ,  G09G2310/0289 ,  G09G2310/061 ,  G09G2310/08 ,  G09G2330/021 ,  G09G2354/00

    Abstract: A touch screen display may include gate line driver circuitry coupled to a display pixel array. The display may be provided with intra-frame pausing (IFP) capabilities, where touch or other operations may be performed during one or more intra-frame blanking intervals. In one suitable arrangement, a gate driver may be operable in a high impedance mode, where the output of the gate driver is left floating during touch or IFP intervals. In another suitable arrangement, the gate driver may be operable in an IFP reduced stress mode, where a digital pass gate in the gate driver is deactivated during IFP intervals. In yet another suitable arrangement, the gate driver may be operable in an all-gate-high (AGH) power-down mode, where the output of each gate driver in the driver circuitry is driven high in parallel when the displayed is being powered off. These arrangements may be implemented in any suitable combination.

    Abstract translation: 触摸屏显示器可以包括耦合到显示像素阵列的栅极线驱动器电路。 显示器可以具有帧内暂停（IFP）能力，其中可以在一个或多个帧内消隐间隔期间执行触摸或其它操作。 在一种合适的布置中，栅极驱动器可以以高阻抗模式工作，其中栅极驱动器的输出在触摸或IFP间隔期间保持悬空。 在另一种合适的布置中，栅极驱动器可以在IFP减小应力模式下操作，其中栅极驱动器中的数字通道在IFP间隔期间被去激活。 在另一种合适的布置中，栅极驱动器可以以全栅极高（AGH）掉电模式工作，其中当所显示的电源被断电时，驱动器电路中的每个栅极驱动器的输出并联驱动为高并行 。 这些布置可以以任何合适的组合来实现。

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