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    TECHNIQUES FOR MITIGATING DISPLAY ARTIFACTS CAUSED BY COMMON VOLTAGE SETTLING ERROR
    12.
    发明申请
    TECHNIQUES FOR MITIGATING DISPLAY ARTIFACTS CAUSED BY COMMON VOLTAGE SETTLING ERROR 有权

    公开(公告)号：US20220059018A1

    公开(公告)日：2022-02-24

    申请号：US17406012

    申请日：2021-08-18

    Applicant: Apple Inc.

    Inventor： Shatam Agarwal ,  Sean C. Chang ,  Hao-Lin Chiu ,  Fenghua Zheng ,  Pierre-Yves Emelie ,  Yao Chen ,  Marc Albrecht ,  Mingxia Gu ,  Jun Qi ,  Wei Chen

    IPC: G09G3/32

    Abstract: A light emitting diode (LED) display can calculate a common voltage charge of a line of pixels in the LED display, the common voltage charge comprising a difference between a first line of pixels and a second line of pixels. If the calculated common voltage charge exceeds a predetermined threshold, a toggle matrix can be generated for the line of pixels. The toggle matrix can include a matrix of charge values generated by calculating a difference in charge values for each subpixel a first line of subpixels with each subpixel a second line of subpixels. The LED display can identify one or more regions of subpixels exhibiting the predetermined toggle pattern in the toggle matrix. The LED display can generate a voltage correction charge to apply to affected regions of the display. Alternatively, the subpixels or pixels could be swapped with adjacent pixels to reduce toggling or settling error.

    Electronic Device Display with a Backlight Having Light-emitting Diodes and Driver Integrated Circuits in an Active Area
    13.
    发明申请
    Electronic Device Display with a Backlight Having Light-emitting Diodes and Driver Integrated Circuits in an Active Area 有权

    公开(公告)号：US20210364854A1

    公开(公告)日：2021-11-25

    申请号：US17203336

    申请日：2021-03-16

    Applicant: Apple Inc.

    Inventor： David W. Lum ,  Kyung Wook Kim ,  Kwang Soon Park ,  Mingxia Gu ,  Jun Qi

    IPC: G02F1/13357 ,  G02F1/1335 ,  H01L25/16 ,  H05B47/16 ,  H05B47/105

    Abstract: A pixel array may be illuminated with backlight illumination from a backlight. The backlight may include a two-dimensional array of light-emitting diodes, with each light-emitting diode being placed in a respective cell. Different light-emitting diodes may have unique brightness magnitudes based on the content of the given display frame. Driver integrated circuits may control one or more associated light-emitting diodes to have a desired brightness level. The driver integrated circuits may be formed in an active area of the backlight. The driver integrated circuits may be arranged in groups that are daisy chained together. A digital signal (that includes information such as addressing information) may be propagated through the group of driver integrated circuits. To manage thermal performance of the backlight, the backlight may include a thermally conductive layer and/or a heat sink structure. To increase the efficiency of the backlight, the backlight may include one or more reflective layers.

    Displays with Ramped Light Guide Layers and Multidirectional Light-Emitting Diodes
    14.
    发明申请
    Displays with Ramped Light Guide Layers and Multidirectional Light-Emitting Diodes 审中-公开

    公开(公告)号：US20170371087A1

    公开(公告)日：2017-12-28

    申请号：US15260904

    申请日：2016-09-09

    Applicant: Apple Inc.

    Inventor： Chenhua You ,  Abdeslam Hafidi ,  Jun Qi ,  Mingxia Gu ,  Victor H. Yin

    IPC: F21V8/00 ,  G02F1/1335 ,  G06F3/041 ,  G02F1/1368 ,  G02F1/1333

    CPC classification number: G02B6/0021 ,  G02B6/00 ,  G02B6/0016 ,  G02B6/0068 ,  G02B6/0073 ,  G02B6/0078

    Abstract: A display such as a liquid crystal display may have an array of pixels that is illuminated using backlight illumination from a backlight. The backlight may have a light guide plate that distributes light from light-emitting diodes across the display. The light-emitting diodes may be overlapped by the light guide plate and may emit light into portions of the light guide plate that have ramped profiles. Light-emitting diodes for the backlight may have multiple light-emitting diode dies mounted on common package substrates. Reflective walls may be formed between the light-emitting diode dies on a substrate. Phosphor may cover the dies. The light-emitting diodes may contain four light-emitting diode dies that emit light in four different directions. Two or more of the dies may emit light of different colors. Light may be emitted into the corners of rectangular light distribution regions of a light guide plate.

    Electronic device display with a backlight having light-emitting diodes and driver integrated circuits in an active area
    18.
    发明授权
    Electronic device display with a backlight having light-emitting diodes and driver integrated circuits in an active area 有权

    公开(公告)号：US11442312B2

    公开(公告)日：2022-09-13

    申请号：US17203311

    申请日：2021-03-16

    Applicant: Apple Inc.

    Inventor： David W. Lum ,  Jingdong Chen ,  Mingxia Gu ,  Jun Qi

    IPC: G02F1/1335 ,  G02F1/13357 ,  H05B47/16 ,  H05B47/105 ,  H01L25/16 ,  G09G3/34

    Abstract: A pixel array may be illuminated with backlight illumination from a backlight. The backlight may include a two-dimensional array of light-emitting diodes, with each light-emitting diode being placed in a respective cell. Different light-emitting diodes may have unique brightness magnitudes based on the content of the given display frame. Driver integrated circuits may control one or more associated light-emitting diodes to have a desired brightness level. The driver integrated circuits may be formed in an active area of the backlight. The driver integrated circuits may be arranged in groups that are daisy chained together. A digital signal (that includes information such as addressing information) may be propagated through the group of driver integrated circuits. To manage thermal performance of the backlight, the backlight may include a thermally conductive layer and/or a heat sink structure. To increase the efficiency of the backlight, the backlight may include one or more reflective layers.

    Backlight units with support posts and cavity height monitoring
    19.
    发明授权
    Backlight units with support posts and cavity height monitoring 有权

    公开(公告)号：US10969628B1

    公开(公告)日：2021-04-06

    申请号：US15988978

    申请日：2018-05-24

    Applicant: Apple Inc.

    Inventor： Erik A. Zweigle ,  Yu P. Sun ,  Ziruo Hong ,  Victor H. Yin ,  Eric L. Benson ,  Rong Liu ,  Mingxia Gu ,  Robert J. Durand ,  Wr Jamarulan Wr Ramli

    IPC: G02F1/13357 ,  G02F1/1333 ,  G02F1/1335

    Abstract: An electronic device may have a display with a backlight. The backlight provides backlight illumination for an array of pixels that is displaying images. The backlight may include an array of cells. Each cell may contain a light source with one or more light-emitting diodes and a cavity reflector that reflects light from the light source outwardly through a diffuser for use in forming the backlight illumination. The light sources may be mounted to a printed circuit. Support posts on the printed circuit may be used to maintain the diffuser at a fixed distance from the printed circuit. The support posts may have opposing first and second ends. The first ends may be attached to the diffuser with fixed connections such as adhesive connections. The second ends may be attached to the printed circuit using floating connections.

    Display calibration system
    20.
    发明授权
    Display calibration system 有权

    公开(公告)号：US10911748B1

    公开(公告)日：2021-02-02

    申请号：US16506410

    申请日：2019-07-09

    Applicant: Apple Inc.

    Inventor： Robert Molholm ,  Mingxia Gu ,  Lu Zhang ,  Francisco H. Imai ,  Jiaying Wu ,  Shahram Peyvandi ,  Gabriel Marcu ,  Po-Chieh Hung ,  Xiran Wang

    IPC: H04N17/04 ,  G06F3/14 ,  G06F3/041

    Abstract: A display calibration system may include a first electronic device that includes an ambient light sensor and a display to be calibrated in a second electronic device. The first electronic device may generate test patterns to be displayed on the display. The ambient light sensor may receive light emitted from the display based on the test patterns to generate display color space data. The first electronic device may generate calibration data for the display based on the display color space data and a target reference color space. The second electronic device may store the calibration data and use the calibration data to generate more accurate images. Because the first electronic device may include other functionalities other display calibration, specialized display calibration equipment may be omitted. Additionally, a third electronic device that acts as an intermediary between the first and second electronic devices.

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