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    Displays with adjustable direct-lit backlight units and power consumption compensation
    3.
    发明授权
    Displays with adjustable direct-lit backlight units and power consumption compensation 有权

    公开(公告)号：US10571744B1

    公开(公告)日：2020-02-25

    申请号：US16388496

    申请日：2019-04-18

    申请人： Apple Inc.

    发明人： Sean C. Chang ,  Tobias Jung ,  Marc Albrecht ,  Abdeslam Hafidi ,  Jun Qi ,  Duane M. Petrovich ,  Mingxia Gu ,  Xiang Fang ,  Pierre-Yves Emelie ,  Wei H Yao

    IPC分类号： G02F1/1335 ,  G09G3/36 ,  G09G3/34

    摘要： A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated by a backlight unit that includes an array of light-emitting diodes. A backlight brightness selection circuit may select brightness values for the light-emitting diodes. The backlight brightness selection circuit may select the brightness values based on image data, based on brightness values used in previous image frames, based on device information, and/or based on sensor information. The backlight brightness selection circuit may select the backlight brightness levels to mitigate visible artifacts such as flickering and halo. The backlight levels selected by the backlight brightness selection may be modified by a power consumption compensation circuit. The power consumption compensation circuit may estimate the amount of power consumption required to operate the backlight using the target brightness levels and may modify the target brightness levels to meet maximum power consumption requirements.

    Display Systems Having Monolithic Arrays of Light-Emitting Diodes
    5.
    发明申请
    Display Systems Having Monolithic Arrays of Light-Emitting Diodes 有权

    公开(公告)号：US20220005798A1

    公开(公告)日：2022-01-06

    申请号：US17475831

    申请日：2021-09-15

    申请人： Apple Inc.

    发明人： Jun Qi ,  Rong Liu ,  Saijin Liu ,  Shaofeng Liu ,  Tongbi T. Jiang ,  Victor H. Yin ,  Xia Li ,  Xiang Fang ,  Ziruo Hong

    IPC分类号： H01L25/16 ,  G02B27/01 ,  H01L23/00 ,  H01L33/62

    摘要： An electronic device may include a display having a monolithic array of light-emitting diodes mounted to a surface of a substrate layer. The diodes may include contact pads. Driver circuitry may independently drive each of the diodes in the array using drive signals. The driver circuitry may be formed on a driver integrated circuit. Bond pads may be formed on a surface of the integrated circuit. Copper pillars may be grown on the bond pads. In another suitable arrangement, the driver circuitry may be formed on a driver printed circuit board coupled to an interposer by a flexible printed circuit. The interposer may include bond pads and copper pillars grown on the bond pads. The contact pads on each of the diodes may be simultaneously bonded to the copper pillars. A surface of the substrate layer may be patterned to form light redirecting elements if desired.