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    Displays with silicon and semiconducting oxide thin-film transistors
    34.
    发明授权
    Displays with silicon and semiconducting oxide thin-film transistors 有权

    公开(公告)号：US10998344B2

    公开(公告)日：2021-05-04

    申请号：US16917601

    申请日：2020-06-30

    Applicant: Apple Inc.

    Inventor： Vasudha Gupta ,  Jae Won Choi ,  Shih Chang Chang ,  Tsung-Ting Tsai ,  Young Bae Park

    IPC: G02F1/1362 ,  H01L27/12 ,  G02F1/1368 ,  H01L27/32 ,  G02F1/1345 ,  H01L29/786

    Abstract: An electronic device may include a display having an array of display pixels on a substrate. The display pixels may be organic light-emitting diode display pixels or display pixels in a liquid crystal display. In an organic light-emitting diode display, hybrid thin-film transistor structures may be formed that include semiconducting oxide thin-film transistors, silicon thin-film transistors, and capacitor structures. The capacitor structures may overlap the semiconducting oxide thin-film transistors. Organic light-emitting diode display pixels may have combinations of oxide and silicon transistors. In a liquid crystal display, display driver circuitry may include silicon thin-film transistor circuitry and display pixels may be based on oxide thin-film transistors. A single layer or two different layers of gate metal may be used in forming silicon transistor gates and oxide transistor gates. A silicon transistor may have a gate that overlaps a floating gate structure.

    Sensing for compensation of pixel voltages
    36.
    发明授权
    Sensing for compensation of pixel voltages 有权

    公开(公告)号：US10217390B2

    公开(公告)日：2019-02-26

    申请号：US15874687

    申请日：2018-01-18

    Applicant: Apple Inc.

    Inventor： Vasudha Gupta ,  Chin-Wei Lin ,  Tsung-Ting Tsai

    IPC: G09G3/00 ,  G09G3/3266

    Abstract: A display device may include rows of pixels that may display image data on a display and a circuit. The circuit may perform a progressive scan across the rows of pixels to display the image data using a plurality of pixels, supply test data to a pixel of plurality of pixels that corresponds to a first row of the rows of pixels during one frame of the progressive scan, and initiate a sensing period for determining one or more sensitivity properties associated with the pixel based on the performance of the pixel with respect to the test data in response to receiving a pulse of a first global signal. The circuit may then end the sensing period in response to receiving a second global signal and resume the progressive scan across the rows of pixels to display the image data after the sensing period ends.

    Organic Light-Emitting Diode Display with External Compensation and Anode Reset
    37.
    发明申请
    Organic Light-Emitting Diode Display with External Compensation and Anode Reset 审中-公开

    公开(公告)号：US20180277037A1

    公开(公告)日：2018-09-27

    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

    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.

    Flexible displays with strengthened pad area
    39.
    发明授权
    Flexible displays with strengthened pad area 有权

    公开(公告)号：US09660004B2

    公开(公告)日：2017-05-23

    申请号：US14497086

    申请日：2014-09-25

    Applicant: Apple Inc.

    Inventor： Da Yu ,  Jae Won Choi ,  Sang Ha Kim ,  Vasudha Gupta ,  Young Bae Park

    IPC: H01L51/56 ,  H01L27/32 ,  H01L51/52

    CPC classification number: H01L27/3244 ,  H01L27/3276 ,  H01L51/5237 ,  H01L51/5246 ,  H01L51/5253 ,  H01L51/56 ,  H01L2251/5338

    Abstract: An electronic device may have a flexible display with portions that can be bent. The display may include an array of display pixels in an active area. Contact pads may be formed in an inactive area of the display. Display circuitry in the active area may exhibit a given stack height, whereas display circuitry in the inactive area may exhibit a stack height that is less than the given stack height. In particular, the contact pads may be formed directly on a multi-buffer layer that sits directly on a flexible display substrate. Passivation material may be selectively formed only at the edges of the contact pad on the multi-buffer layer. The multi-buffer layer may be formed at a distance from the edge of the flexible display substrate to minimize cracking in the multi-buffer layer.

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