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    Organic light-emitting diode display with external compensation and anode reset
    151.
    发明授权
    Organic light-emitting diode display with external compensation and anode reset 审中-公开

    公开(公告)号：US10672338B2

    公开(公告)日：2020-06-02

    申请号：US15802367

    申请日：2017-11-02

    Applicant: Apple Inc.

    Inventor： Chin-Wei Lin ,  Shinya Ono ,  Vasudha Gupta

    IPC: G09G3/325 ,  G09G3/3258 ,  G09G3/3291 ,  G06F3/041 ,  G06F3/044 ,  H01L27/32 ,  G09G3/3233 ,  G09G3/3275

    Abstract: A display may include an array of organic light-emitting diode display pixels having transistors characterized by threshold voltages subject to transistor variations. Compensation circuitry may be used to measure a transistor threshold voltage for a pixel. The threshold voltage may be sampled by controlling the pixel to sample the threshold voltage onto a capacitor at the pixel. The pixel may include at least one semiconducting-oxide transistor, silicon transistors, and a light-emitting diode. The diode may be coupled to a data line that can be used for both data loading and compensation sensing operations. Reset operations may be performed after data programming and before emission to reset the anode voltage for the diode.

    Display having gate driver bootstrapping circuitry with enhanced-efficiency
    154.
    发明授权
    Display having gate driver bootstrapping circuitry with enhanced-efficiency 有权

    公开(公告)号：US10522087B2

    公开(公告)日：2019-12-31

    申请号：US15986725

    申请日：2018-05-22

    Applicant: Apple Inc.

    Inventor： Chin-Wei Lin ,  Majid Gharghi

    IPC: G09G3/32 ,  G09G3/3266 ,  H01L27/32

    Abstract: A display may have gate driver circuitry that include a series of linked gate driver circuits each of which has an output and has an input coupled to the output of a preceding one of the gate driver circuits. Bootstrapping circuitry may be provided in the gate driver circuitry. Each gate driver circuit may have a bootstrapping circuit that includes transistors and a bootstrapping capacitor. Bootstrapping efficiency may be enhanced by configuring the bootstrapping capacitor to reduce parasitic capacitances. A transistor in each bootstrapping circuit may have first and second source-drain terminals, and a gate terminal that lies between the first and second source-drain terminals and that runs parallel to the first and second source-drain terminals. The bootstrapping capacitor may have a first electrode formed from the gate terminal and a second electrode that overlaps the first electrode and that lies between the first and second source-drain terminals.

    Electronic Devices With Low Refresh Rate Display Pixels
    156.
    发明申请
    Electronic Devices With Low Refresh Rate Display Pixels 审中-公开

    公开(公告)号：US20190237010A1

    公开(公告)日：2019-08-01

    申请号：US16379323

    申请日：2019-04-09

    Applicant: Apple Inc.

    Inventor： Chin-Wei Lin ,  Shyuan Yang ,  Chuang Qian ,  Abbas Jamshidi Roudbari ,  Ting-Kuo Chang

    IPC: G09G3/3225 ,  G09G3/3233

    Abstract: A display may have an array of organic light-emitting diode display pixels operating at a low refresh rate. Each display pixel may have six thin-film transistors and one capacitor. One of the six transistors may serve as the drive transistor and may be compensated using the remaining five transistors and the capacitor. One or more on-bias stress operations may be applied before threshold voltage sampling to mitigate first frame dimming. Multiple anode reset and on-bias stress operations may be inserted during vertical blanking periods to reduce flicker and maintain balance and may also be inserted between successive data refreshes to improve first frame performance. Two different emission signals controlling each pixel may be toggled together using a pulse width modulation scheme to help provide darker black levels.

    Display with light-emitting diodes
    157.
    发明授权
    Display with light-emitting diodes 有权

    公开(公告)号：US10354585B2

    公开(公告)日：2019-07-16

    申请号：US15811406

    申请日：2017-11-13

    Applicant: Apple Inc.

    Inventor： Chin-Wei Lin ,  Hung Sheng Lin ,  Shih Chang Chang ,  Shinya Ono

    IPC: G09G3/30 ,  G09G3/3233 ,  H01L29/786 ,  G09G3/3266 ,  G09G3/3275 ,  H01L27/12

    Abstract: A display may have an array of pixels each of which has a light-emitting diode such as an organic light-emitting diode. A drive transistor and an emission transistor may be coupled in series with the light-emitting diode of each pixel between a positive power supply and a ground power supply. The pixels may include first and second switching transistors. A data storage capacitor may be coupled between a gate and source of the drive transistor in each pixel. Signal lines may be provided in columns of pixels to route signals such as data signals, sensed drive currents from the drive transistors, and predetermined voltages between display driver circuitry and the pixels. The switching transistors, emission transistors, and drive transistors may include semiconducting-oxide transistors and silicon transistors and may be n-channel transistors or p-channel transistors.

    Electronic Devices With Low Refresh Rate Display Pixels
    159.
    发明申请
    Electronic Devices With Low Refresh Rate Display Pixels 审中-公开

    公开(公告)号：US20190057646A1

    公开(公告)日：2019-02-21

    申请号：US15996366

    申请日：2018-06-01

    Applicant: Apple Inc.

    Inventor： Chin-Wei Lin ,  Shyuan Yang ,  Chuang Qian ,  Abbas Jamshidi Roudbari ,  Ting-Kuo Chang

    IPC: G09G3/3225

    Abstract: A display may have an array of organic light-emitting diode display pixels operating at a low refresh rate. Each display pixel may have six thin-film transistors and one capacitor. One of the six transistors may serve as the drive transistor and may be compensated using the remaining five transistors and the capacitor. One or more on-bias stress operations may be applied before threshold voltage sampling to mitigate first frame dimming. Multiple anode reset and on-bias stress operations may be inserted during vertical blanking periods to reduce flicker and maintain balance and may also be inserted between successive data refreshes to improve first frame performance. Two different emission signals controlling each pixel may be toggled together using a pulse width modulation scheme to help provide darker black levels.

    Light Sensing Display
    160.
    发明申请
    Light Sensing Display 审中-公开

    公开(公告)号：US20180348959A1

    公开(公告)日：2018-12-06

    申请号：US15761603

    申请日：2016-07-18

    Applicant: Apple Inc.

    Inventor： Hung Sheng Lin ,  Chin-Wei Lin ,  Tsung-Ting Tsai

    IPC: G06F3/042 ,  G06F3/041 ,  G09G3/3258

    CPC classification number: G09G3/3233 ,  G06F3/0412 ,  G06F3/042 ,  G09G3/3659 ,  G09G2320/0295 ,  G09G2360/148

    Abstract: A display may have an array of pixels. The pixels may contain light-emitting diodes. When it is desired to use the display to operate as a light sensor, some of the light-emitting diodes may be forward biased to emit light while some of the light-emitting diodes are reversed biased to detect the emitted light after the emitted light has reflected from an external object. During light sensing operations, one or more areas of the display may be temporarily deactivated so that the light-sensing pixels may measure the reflected light. Vertical lines may serve both as data loading lines and as current sensing lines. Currents may be sensed during drive transistor current compensation and during light sensing. The vertical lines may load signals into the pixels that forward bias the light-emitting diodes to emit light when it is desired to display images for a user.

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