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    Locally adaptive backlight control
    1.
    发明授权
    Locally adaptive backlight control 有权

    公开(公告)号：US10803828B2

    公开(公告)日：2020-10-13

    申请号：US15442296

    申请日：2017-02-24

    Applicant: Apple Inc.

    Inventor： Ameya Joshi ,  Marc Albrecht ,  Sean Chang ,  Tobias Jung

    IPC: G09G5/10 ,  G09G3/34

    Abstract: Systems, methods, and computer readable media to improve the operation of display systems are disclosed. In general, techniques are disclosed for dynamically adjusting backlight elements based on image content. More particularly, a backlight element's intensity may be targeted for boosting (i.e., increasing) based on content of the backlight element's corresponding image region, where after a check may be made to determine if the proposed increase is likely to risk generation of a halo. If the proposed intensity increase would risk a halo, the backlight element's proposed intensity may be dimmed. Repeating the boost/dim cycle in an iterative fashion permits an image to be displayed with brighter highlights and deeper blacks.

    DEVICES AND METHODS OF ADAPTIVE DIMMING USING LOCAL TONE MAPPING
    5.
    发明申请
    DEVICES AND METHODS OF ADAPTIVE DIMMING USING LOCAL TONE MAPPING 有权
    使用本地色调映射的自适应调制的设备和方法

    公开(公告)号：US20170039967A1

    公开(公告)日：2017-02-09

    申请号：US14818001

    申请日：2015-08-04

    Applicant: Apple Inc.

    Inventor： Tobias Jung ,  Marc Albrecht ,  Sandro H. Pintz

    IPC: G09G3/36 ,  G06T5/40 ,  G09G3/20

    CPC classification number: G09G3/3648 ,  G06T5/007 ,  G06T5/40 ,  G09G3/3406 ,  G09G3/3426 ,  G09G2320/0233 ,  G09G2320/0646 ,  G09G2320/066 ,  G09G2360/16

    Abstract: Methods, systems, and devices for improving contrast, dynamic range, and power consumption of a backlight in a display are provided. By way of example, a method includes receiving image data to be displayed on pixels of a display panel, generating a global histogram of the image data, generating a plurality of thresholds based on the global histogram, and defining a first threshold and a second threshold of the plurality of thresholds as local thresholds based on the global histogram and a local histogram. The first threshold and the second threshold are generated according to a local tone mapping function. The method further includes adjusting a luminance of one or more of pixels of the display panel based at least in part on the first threshold and the second threshold.

    Abstract translation: 提供了用于改善显示器中的背光的对比度，动态范围和功率消耗的方法，系统和设备。 作为示例，一种方法包括接收要在显示面板的像素上显示的图像数据，生成图像数据的全局直方图，基于全局直方图生成多个阈值，以及定义第一阈值和第二阈值 的多个阈值作为基于全局直方图和局部直方图的局部阈值。 根据本地色调映射功能生成第一阈值和第二阈值。 该方法还包括至少部分地基于第一阈值和第二阈值来调整显示面板的一个或多个像素的亮度。

    Displays with adjustable direct-lit backlight units and adaptive processing
    6.
    发明授权
    Displays with adjustable direct-lit backlight units and adaptive processing 有权

    公开(公告)号：US10964275B2

    公开(公告)日：2021-03-30

    申请号：US16418748

    申请日：2019-05-21

    Applicant: Apple Inc.

    Inventor： Duane M. Petrovich ,  Sean C. Chang ,  Tobias Jung ,  Pierre-Yves Emelie ,  Marc Albrecht ,  Chen Zheng ,  Andrei E. Toma ,  Kevin W. Sliech ,  Mingxia Gu ,  Wei H. Yao

    IPC: G09G3/34 ,  G02F1/13357 ,  G02F1/1335

    Abstract: 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.

    Electronic Display Burn-In Detection and Mitigation
    7.
    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.

    Locally Adaptive Backlight Control
    9.
    发明申请
    Locally Adaptive Backlight Control 审中-公开

    公开(公告)号：US20180247609A1

    公开(公告)日：2018-08-30

    申请号：US15442296

    申请日：2017-02-24

    Applicant: Apple Inc.

    Inventor： Ameya Joshi ,  Marc Albrecht ,  Sean Chang ,  Tobias Jung

    IPC: G09G5/10 ,  G09G3/34 ,  G09G3/20

    Abstract: Systems, methods, and computer readable media to improve the operation of display systems are disclosed. In general, techniques are disclosed for dynamically adjusting backlight elements based on image content. More particularly, a backlight element's intensity may be targeted for boosting (i.e., increasing) based on content of the backlight element's corresponding image region, where after a check may be made to determine if the proposed increase is likely to risk generation of a halo. If the proposed intensity increase would risk a halo, the backlight element's proposed intensity may be dimmed. Repeating the boost/dim cycle in an iterative fashion permits an image to be displayed with brighter highlights and deeper blacks.

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