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    Display with optical sensor for brightness compensation
    3.
    发明授权
    Display with optical sensor for brightness compensation 有权

    公开(公告)号：US11145249B1

    公开(公告)日：2021-10-12

    申请号：US16930204

    申请日：2020-07-15

    Applicant: Apple Inc.

    Inventor： Wanglei Han ,  Akshay Bhat ,  Michael H. Lim ,  Kyung Hoae Koo ,  Jiayi Jin ,  David A. Doyle ,  Tae-Wook Koh ,  Jared S. Price ,  Yifan Zhang ,  Mahdi Nezamabadi

    IPC: G09G3/3225 ,  G09G3/00

    Abstract: A display may include pixels (such as light-emitting diode pixels) that are susceptible aging effects (burn-in). To help avoid visible artifacts caused by burn-in during operation of the display, compensation circuitry may be used to compensate image data for the display. An optical sensor may be included behind the pixels to directly measure pixel brightness levels. The optical sensor may provide optical sensor data from testing operations to the compensation circuitry. The optical sensor may gather data during burn-in testing operations. During the burn-in testing operations, pixel groups including both high-usage pixels and low-usage pixels may sequentially emit light while the optical sensor gathers data. Brightness differences between the high-usage pixels and low-usage pixels may be used to characterize pixel aging in the display and compensate image data to mitigate visible artifacts caused by burn-in. The optical sensor may also gather data during global brightness testing operations.

    Electronic devices with display burn-in mitigation
    4.
    发明授权
    Electronic devices with display burn-in mitigation 有权

    公开(公告)号：US10983482B2

    公开(公告)日：2021-04-20

    申请号：US16277842

    申请日：2019-02-15

    Applicant: Apple Inc.

    Inventor： Tae-Wook Koh ,  Yiqiang Nie ,  Yifan Zhang ,  Giovanni M. Agnoli ,  Paul S. Drzaic ,  David A. Doyle

    IPC: G06F1/00 ,  G04G9/00 ,  G09G3/20 ,  G09G3/3225

    Abstract: An electronic device such as a wristwatch device or other device may have a display. The display may be used to continuously display information such as watch face information. A watch face image on the display may contain watch face elements such as watch face hands, watch face indices, and complications. To reduce burn-in risk for watch face elements, control circuitry in the electronic device may impose burn-in constraints on attributes of the watch face elements such as peak luminance constraints, dwell time constraints, color constraints, constraints on the shape of each element, and constraints on element style. These constraints may help avoid situations in which static elements such as watch face indices create more burn-in than dynamic elements such as watch face hands.

    Electronic Devices With Display Burn-in Mitigation
    5.
    发明申请
    Electronic Devices With Display Burn-in Mitigation 审中-公开

    公开(公告)号：US20200218204A1

    公开(公告)日：2020-07-09

    申请号：US16277842

    申请日：2019-02-15

    Applicant: Apple Inc.

    Inventor： Tae-Wook Koh ,  Yiqiang Nie ,  Yifan Zhang ,  Giovanni M. Agnoli ,  Paul S. Drzaic ,  David A. Doyle

    IPC: G04G9/00 ,  G09G3/20 ,  G09G3/3225

    Abstract: An electronic device such as a wristwatch device or other device may have a display. The display may be used to continuously display information such as watch face information. A watch face image on the display may contain watch face elements such as watch face hands, watch face indices, and complications. To reduce burn-in risk for watch face elements, control circuitry in the electronic device may impose burn-in constraints on attributes of the watch face elements such as peak luminance constraints, dwell time constraints, color constraints, constraints on the shape of each element, and constraints on element style. These constraints may help avoid situations in which static elements such as watch face indices create more burn-in than dynamic elements such as watch face hands.

    BURN-IN STATISTICS WITH LUMINANCE BASED AGING
    6.
    发明申请
    BURN-IN STATISTICS WITH LUMINANCE BASED AGING 有权

    公开(公告)号：US20210183333A1

    公开(公告)日：2021-06-17

    申请号：US16711319

    申请日：2019-12-11

    Applicant: Apple Inc.

    Inventor： Peter F. Holland ,  Mahesh B. Chappalli ,  Yifan Zhang ,  Tae-Wook Koh

    IPC: G09G5/10

    Abstract: An electronic device may include an electronic display and a display pipeline. The electronic display may include multiple pixels to display images based at least in part on pixel data. The display pipeline may receive image data and process the image data to determine the pixel data. The display pipeline may include burn-in compensation circuitry to apply gains to the image data based at least in part on burn-in statistics to generate the pixel data. The gain to be applied to the image data for a pixel of the electronic display is determined by the burn-in compensation circuitry, based at least in part on an emission duty cycle of the pixel, to compensate the image data for the pixel for burn-in related aging of the pixel.

    Light-emitting diode displays with predictive luminance compensation
    7.
    发明授权
    Light-emitting diode displays with predictive luminance compensation 有权

    公开(公告)号：US10453388B2

    公开(公告)日：2019-10-22

    申请号：US15967402

    申请日：2018-04-30

    Applicant: Apple Inc.

    Inventor： Jiye Lee ,  Yifan Zhang ,  Chieh-Wei Chen ,  Tae-Wook Koh ,  Hongwei Chang ,  Paul S. Drzaic

    IPC: G09G3/3225 ,  G09G3/20 ,  H05B33/08 ,  G09G3/32 ,  H05B37/02

    Abstract: An electronic device may be provided with a display. A content generator may generate frames of image data to be displayed on the display. The display may have an array of pixels that emit light to display images. The pixels may contain light-emitting devices such as organic light-emitting diodes, quantum dot light-emitting diodes, and light-emitting diodes formed from discrete semiconductor dies. As a result of aging, the light producing capabilities of the light-emitting devices may degrade over time. The electronic device may have a temperature sensor that gathers temperature measurements and an ambient light sensor. A pixel luminance degradation compensator may apply compensation factors to uncorrected pixel luminance values associated with the frames of image data to produce corresponding corrected pixel luminance values for the display. The compensation factors may be based on aging history information such as pixel luminance history, ambient light exposure, and temperature measurements.

    Electronic Display Burn-In Detection and Mitigation
    9.
    发明申请
    Electronic Display Burn-In Detection and Mitigation 审中-公开

    公开(公告)号：US20190080670A1

    公开(公告)日：2019-03-14

    申请号：US15948796

    申请日：2018-04-09

    Applicant: Apple Inc.

    Inventor： Tobias Jung ,  Marc Albrecht ,  Paul S. Drzaic ,  Tae-Wook Koh ,  Teun R. Baar ,  Yifan Zhang ,  Ramin Samadani ,  Nicolas P. Bonnier

    IPC: G09G5/10

    Abstract: Systems, methods, and devices are provided to reduce a likelihood of image burn-in on an electronic display. Such an electronic device may include image processing circuitry and an electronic display. The image processing circuitry may receive image data and analyze the image data for risk of image burn-in and, based at least in part on the analysis of the image data, reduce a risk of image burn-in at least in part by reducing a local maximum pixel luminance value in at least one of a plurality of regions of the image data over time or by reducing a dynamic range headroom of the image data. The electronic display may display the image data with a reduced risk of image burn-in on the pixels of the electronic display.

    Micro-LED burn-in statistics and compensation systems and methods
    10.
    发明授权
    Micro-LED burn-in statistics and compensation systems and methods 有权

    公开(公告)号：US12154487B2

    公开(公告)日：2024-11-26

    申请号：US18180697

    申请日：2023-03-08

    Applicant: Apple Inc.

    Inventor： Vincent Z Young ,  Mahesh B Chappalli ,  Tae-Wook Koh ,  Yifan Zhang ,  Jared S Price

    IPC: G09G3/30 ,  G09G3/32

    Abstract: Image processing circuitry may include burn-in compensation circuitry that receives image data indicative of luminance outputs for display pixels of an electronic display and compensates the image data for burn-in related aging associated with the display pixels, generating compensated image data. Moreover, compensating the image data may include applying gains based on estimated amounts of aging associated with the display pixels and estimated amounts of current to be delivered to the display pixels. The image processing circuitry may also include burn-in statistics circuitry that tracks the estimated amounts of aging based on the compensated image data.

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