公开(公告)号：US10665181B2

公开(公告)日：2020-05-26

申请号：US15907097

申请日：2018-02-27

Applicant: Apple Inc.

Inventor： Marc Albrecht ,  Teun R. Baar ,  Nicolas P. Bonnier ,  Sean Chang ,  ByoungSuk Kim ,  David S. Zalatimo

IPC: G06F1/16 ,  G09G3/34

Abstract: An electronic device may be provided with a display. The display may include a backlight having an array of locally dimmable light sources. Control circuitry may provide control signals to the backlight to produce light at different brightness levels. When the brightness level is below a threshold, the control circuitry may use pulse-width-modulation control signals to control the light sources in the backlight. When the brightness level is above the brightness threshold, the control circuitry may use analog control signals to control the light sources in the backlight. The control circuitry may adjust the threshold to achieve different dimming ranges for different brightness settings. A low brightness setting, for example, may have a lower threshold and lower dimming range than a high brightness setting, which may help produce darker darks when the display operates in a low brightness setting.

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.

公开(公告)号：US20190005898A1

公开(公告)日：2019-01-03

申请号：US15907097

申请日：2018-02-27

Applicant: Apple Inc.

Inventor： Marc Albrecht ,  Teun R. Baar ,  Nicolas P. Bonnier ,  Sean Chang ,  ByoungSuk Kim ,  David S. Zalatimo

IPC: G09G3/34 ,  G06F1/16

CPC classification number: G09G3/3426 ,  G06F1/1643 ,  G09G2320/0285 ,  G09G2320/0606 ,  G09G2320/0626 ,  G09G2320/0633 ,  G09G2320/064 ,  G09G2360/144

Abstract: An electronic device may be provided with a display. The display may include a backlight having an array of locally dimmable light sources. Control circuitry may provide control signals to the backlight to produce light at different brightness levels. When the brightness level is below a threshold, the control circuitry may use pulse-width-modulation control signals to control the light sources in the backlight. When the brightness level is above the brightness threshold, the control circuitry may use analog control signals to control the light sources in the backlight. The control circuitry may adjust the threshold to achieve different dimming ranges for different brightness settings. A low brightness setting, for example, may have a lower threshold and lower dimming range than a high brightness setting, which may help produce darker darks when the display operates in a low brightness setting.

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.