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    Electronic display with hybrid in-pixel and external compensation
    102.
    发明授权
    Electronic display with hybrid in-pixel and external compensation 有权

    公开(公告)号：US10885850B2

    公开(公告)日：2021-01-05

    申请号：US16716911

    申请日：2019-12-17

    Applicant: Apple Inc.

    Inventor： Chin-Wei Lin ,  Shinya Ono ,  Zino Lee ,  Yun Wang ,  Fan Gui

    IPC: G09G3/3258 ,  H01L27/32 ,  H01L29/786

    Abstract: A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.

    Methods and apparatus for mitigating hysteresis impact on current sensing accuracy for an electronic display
    103.
    发明授权
    Methods and apparatus for mitigating hysteresis impact on current sensing accuracy for an electronic display 有权

    公开(公告)号：US10861389B2

    公开(公告)日：2020-12-08

    申请号：US16536221

    申请日：2019-08-08

    Applicant: Apple Inc.

    Inventor： Chin-Wei Lin ,  Shinya Ono ,  Zino Lee

    IPC: G09G3/3233 ,  G09G3/3258

    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 sense a current from selected display pixels. A display pixel may include a drive transistor, a gate setting transistor for driving a reference voltage onto the gate terminal of the drive transistor, a data loading and current sensing transistor for connecting the drive transistor to a data/current-sensing line, a light-emitting diode, an emission control transistor coupled between the drive transistor and the diode, and an anode resetting transistor for selectively resetting the anode terminal of the diode. During pixel conditioning and current sensing operations, the anode resetting transistor may be constantly turned on to ensure that there is no voltage perturbation at the source terminal of the drive transistor, which can help prevent hysteresis-induced current sensing error.

    Electronic devices with low refresh rate display pixels
    105.
    发明授权
    Electronic devices with low refresh rate display pixels 有权

    公开(公告)号：US10741121B2

    公开(公告)日：2020-08-11

    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: G09G3/32 ,  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.

    Electronic Devices With Low Refresh Rate Display Pixels
    106.
    发明申请
    Electronic Devices With Low Refresh Rate Display Pixels 审中-公开

    公开(公告)号：US20200098314A1

    公开(公告)日：2020-03-26

    申请号：US16696578

    申请日：2019-11-26

    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 transmitting windows
    108.
    发明授权
    Display with light transmitting windows 有权

    公开(公告)号：US10381381B1

    公开(公告)日：2019-08-13

    申请号：US15274546

    申请日：2016-09-23

    Applicant: Apple Inc.

    Inventor： Minhyuk Choi ,  Bhadrinarayana Lalgudi Visweswaran ,  Cheng Chen ,  Chin-Wei Lin ,  Meng-Huan Ho ,  Rui Liu ,  Shih Chang Chang ,  Soojin Park ,  Sarfaraz Moh ,  Jungmin Lee ,  John Z. Zhong

    IPC: H01L27/12 ,  H01L31/12

    Abstract: A display may have an array of pixels with light-emitting diodes that emit light to form images. The display may have a substrate with thin-film transistor circuitry for supplying signals to the light-emitting diodes. Anodes may be formed on the thin-film transistor circuitry, emissive material may be formed on the anodes, and a cathode layer may overlap the anodes. During operation, currents may flow between the anodes and the cathode layer to illuminate the diodes. An array of electrical components such as an array of light sensors in an integrated circuit may be mounted under the substrate. An array of corresponding light transmitting windows may be formed in the display each of which may allow light to pass through the display to a corresponding one of the light sensors. Light transmitting windows may be formed by patterning the cathode layer and supplying the windows with antireflection layers.

    High Frame Rate Display
    109.
    发明申请
    High Frame Rate Display 审中-公开

    公开(公告)号：US20190228726A1

    公开(公告)日：2019-07-25

    申请号：US16369319

    申请日：2019-03-29

    Applicant: Apple Inc.

    Inventor： Shinya Ono ,  Zino Lee ,  Gihoon Choo ,  Hassan Edrees ,  Chin-Wei Lin

    IPC: G09G3/36 ,  G09G3/3225

    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.

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