公开(公告)号：US10964275B2

公开(公告)日：2021-03-30

申请号：US16418748

申请日：2019-05-21

申请人： Apple Inc.

发明人： 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分类号： G09G3/34 ,  G02F1/13357 ,  G02F1/1335

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.

公开(公告)号：US20200335047A1

公开(公告)日：2020-10-22

申请号：US16418748

申请日：2019-05-21

申请人： Apple Inc.

发明人： 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分类号： G09G3/34 ,  G02F1/1335

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.