Display with Silicon Gate Drivers and Semiconducting Oxide Pixels

    公开(公告)号:US20250131885A1

    公开(公告)日:2025-04-24

    申请号:US18407578

    申请日:2024-01-09

    Applicant: Apple Inc.

    Abstract: A display may include an array of pixels that receive control signals from a chain of gate drivers. The pixels can be formed using semiconducting oxide transistors, whereas the gate drivers can be formed using silicon transistor. Each gate driver may include a shift register subcircuit and an output buffer subcircuit. The shift register subcircuit may include a first set of transistors at least partially controlled by one or more shift register clock signals. The output buffer subcircuit may include a second set of transistors at least partially controlled by one or more output buffer clock signals. The output buffer clock signals can toggle independently from the shift register clock signals. Operated in this way, the shift register clock signals can have pulse widths optimized for stability while the output buffer clock signals can have pulse widths optimized for speed.

    Displays with reduced temperature luminance sensitivity

    公开(公告)号:US12014686B2

    公开(公告)日:2024-06-18

    申请号:US17970842

    申请日:2022-10-21

    Applicant: Apple Inc.

    Abstract: A display may include an array of pixels. Each pixel in the array may include a drive transistor, emission transistors, a data loading transistor, a gate voltage setting transistor, an initialization transistor, an anode reset transistor, a storage capacitor, and an optional current boosting capacitor. A data refresh may include a initialization phase, a threshold voltage sampling phase, and a data programming phase. The threshold voltage sampling phase can be substantially longer than the data programming phase to decrease a current sampling level during the threshold voltage sampling phase, which helps reduce the display luminance sensitivity to temperature variations.

    Display with light-emitting diodes
    49.
    发明授权

    公开(公告)号:US11462163B2

    公开(公告)日:2022-10-04

    申请号:US17555694

    申请日:2021-12-20

    Applicant: Apple Inc.

    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.

    Displays with Reduced Temperature Luminance Sensitivity

    公开(公告)号:US20220284860A1

    公开(公告)日:2022-09-08

    申请号:US17317128

    申请日:2021-05-11

    Applicant: Apple Inc.

    Abstract: A display may include an array of pixels. Each pixel in the array may include a drive transistor, emission transistors, a data loading transistor, a gate voltage setting transistor, an initialization transistor, an anode reset transistor, a storage capacitor, and an optional current boosting capacitor. A data refresh may include a initialization phase, a threshold voltage sampling phase, and a data programming phase. The threshold voltage sampling phase can be substantially longer than the data programming phase to decrease a current sampling level during the threshold voltage sampling phase, which helps reduce the display luminance sensitivity to temperature variations.

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