公开(公告)号：US10789902B2

公开(公告)日：2020-09-29

申请号：US16113132

申请日：2018-08-27

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Brijesh Tripathi ,  Christopher Philip Alan Tann ,  David S. Zalatimo ,  Guy Cote ,  Hao Nan ,  Marc Albrecht ,  Paolo Sacchetto ,  Sandro H. Pintz

IPC: G09G3/36

Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The image frames may be displayed with positive and negative polarities to help reduce charge accumulation effects. A charge accumulation tracker may analyze the image frames to determine when there is a risk of excess charge accumulation. The charge accumulation tracker may analyze information on gray levels, frame duration, and frame polarity. The charge accumulation tracker may compute a charge accumulation metric for entire image frames or may process subregions of each frame separately. When subregions are processed separately, each subregion may be individually monitored for a risk of excess charge accumulation.

公开(公告)号：US20140267448A1

公开(公告)日：2014-09-18

申请号：US14059329

申请日：2013-10-21

Applicant: Apple Inc.

Inventor： Marc Albrecht ,  Christopher Philip Alan Tann ,  Nicholas G. Roland ,  Sandro H. Pintz ,  Taesung Kim

IPC: G09G3/34

CPC classification number: G09G3/3406 ,  G09G3/2007 ,  G09G2320/0242 ,  G09G2320/0276 ,  G09G2320/0285 ,  G09G2320/0626 ,  G09G2320/103 ,  G09G2330/021 ,  G09G2340/0435

Abstract: A method and system are provided for compensating for brightness changes in a display having an array of display pixels. The method includes storing a plurality of look-up tables, where each table has a plurality of brightness signals that provide compensation for a brightness change when the refresh rate is changed during a panel self-refresh. The method also includes using display control circuitry to determine the refresh rate associated with an input signal and to determine a compensation based on the refresh rate. The display control circuitry may, for example, use non-linear interpolation to generate a look-up table for the refresh rate. The display control circuitry may adjust the input signal based on the look-up table to produce an output signal that compensates for a brightness change at the refresh rate. The output signal may be transmitted to the array of display pixels.

Abstract translation: 提供了一种用于补偿具有显示像素阵列的显示器中的亮度变化的方法和系统。 该方法包括存储多个查找表，其中每个表具有多个亮度信号，当在面板自刷新期间刷新刷新率改变时，其提供对亮度变化的补偿。 该方法还包括使用显示控制电路来确定与输入信号相关联的刷新率并且基于刷新率来确定补偿。 显示控制电路可以例如使用非线性内插来产生刷新率的查找表。 显示控制电路可以基于查找表调整输入信号，以产生补偿刷新率下的亮度变化的输出信号。 输出信号可以被发送到显示像素阵列。

公开(公告)号：US20140267370A1

公开(公告)日：2014-09-18

申请号：US13801918

申请日：2013-03-13

Applicant: APPLE INC.

Inventor： Marc Albrecht ,  Christopher Philip Alan Tann ,  Nocholas G. Roland

IPC: G09G5/10

CPC classification number: G09G5/006 ,  G09G2320/0626 ,  G09G2330/022 ,  G09G2340/0435 ,  G09G2360/18

Abstract: A method is provided for compensating for brightness change in a display. The method includes storing a plurality of look-up tables (LUTs), where each table has a plurality of pixel levels at a variable refresh rate (VRR) and a plurality of brightness signals that provide compensation for the brightness change when refresh rate is changed during a panel self-refresh (PSR). The method also includes receiving an input signal from a graphics processing unit (GPU) and determining the VRR of the input signal from the GPU. The method further includes obtaining the LUT at the determined VRR of the input signal and adjusting the input signal to produce an output signal that compensates for the brightness change for each pixel or sub-pixel in a timing controller based upon the LUT at the determined VRR. The method further includes transmitting the output signal to the display. A system is also provided.

Abstract translation: 提供了一种补偿显示器亮度变化的方法。 该方法包括存储多个查找表（LUT），其中每个表具有可变刷新率（VRR）的多个像素级和当刷新率改变时为亮度改变提供补偿的多个亮度信号 在面板自刷新（PSR）期间。 该方法还包括从图形处理单元（GPU）接收输入信号并确定来自GPU的输入信号的VRR。 该方法还包括在确定的输入信号的VRR上获得LUT并调整输入信号以产生一个输出信号，该输出信号基于在所确定的VRR上的LUT来补偿定时控制器中的每个像素或子像素的亮度变化 。 该方法还包括将输出信号发送到显示器。 还提供了一个系统。

公开(公告)号：US09922608B2

公开(公告)日：2018-03-20

申请号：US14722620

申请日：2015-05-27

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Brijesh Tripathi ,  Christopher Philip Alan Tann ,  David S. Zalatimo ,  Guy Cote ,  Hao Nan ,  Marc Albrecht ,  Paolo Sacchetto ,  Sandro H. Pintz

IPC: G09G3/36

CPC classification number: G09G3/3614 ,  G09G2320/0204 ,  G09G2320/0247 ,  G09G2320/0257 ,  G09G2320/046 ,  G09G2340/0435 ,  G09G2360/16

Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The image frames may be displayed with positive and negative polarities to help reduce charge accumulation effects. A charge accumulation tracker may analyze the image frames to determine when there is a risk of excess charge accumulation. The charge accumulation tracker may analyze information on gray levels, frame duration, and frame polarity. The charge accumulation tracker may compute a charge accumulation metric for entire image frames or may process subregions of each frame separately. When subregions are processed separately, each subregion may be individually monitored for a risk of excess charge accumulation.

公开(公告)号：US09620064B2

公开(公告)日：2017-04-11

申请号：US14059329

申请日：2013-10-21

Applicant: Apple Inc.

Inventor： Marc Albrecht ,  Christopher Philip Alan Tann ,  Nicholas G. Roland ,  Sandro H. Pintz ,  Taesung Kim

IPC: G09G3/36 ,  G09G3/34 ,  G09G3/20

CPC classification number: G09G3/3406 ,  G09G3/2007 ,  G09G2320/0242 ,  G09G2320/0276 ,  G09G2320/0285 ,  G09G2320/0626 ,  G09G2320/103 ,  G09G2330/021 ,  G09G2340/0435

Abstract: A method and system are provided for compensating for brightness changes in a display having an array of display pixels. The method includes storing a plurality of look-up tables, where each table has a plurality of brightness signals that provide compensation for a brightness change when the refresh rate is changed during a panel self-refresh. The method also includes using display control circuitry to determine the refresh rate associated with an input signal and to determine a compensation based on the refresh rate. The display control circuitry may, for example, use non-linear interpolation to generate a look-up table for the refresh rate. The display control circuitry may adjust the input signal based on the look-up table to produce an output signal that compensates for a brightness change at the refresh rate. The output signal may be transmitted to the array of display pixels.

公开(公告)号：US20180366078A1

公开(公告)日：2018-12-20

申请号：US16113132

申请日：2018-08-27

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Brijesh Tripathi ,  Christopher Philip Alan Tann ,  David S. Zalatimo ,  Guy Cote ,  Hao Nan ,  Marc Albrecht ,  Paolo Sacchetto ,  Sandro H. Pintz

IPC: G09G3/36

Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The image frames may be displayed with positive and negative polarities to help reduce charge accumulation effects. A charge accumulation tracker may analyze the image frames to determine when there is a risk of excess charge accumulation. The charge accumulation tracker may analyze information on gray levels, frame duration, and frame polarity. The charge accumulation tracker may compute a charge accumulation metric for entire image frames or may process subregions of each frame separately. When subregions are processed separately, each subregion may be individually monitored for a risk of excess charge accumulation.

公开(公告)号：US10102815B2

公开(公告)日：2018-10-16

申请号：US15890517

申请日：2018-02-07

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Brijesh Tripathi ,  Christopher Philip Alan Tann ,  David S. Zalatimo ,  Guy Cote ,  Hao Nan ,  Marc Albrecht ,  Paolo Sacchetto ,  Sandro H. Pintz

IPC: G09G3/36

Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The image frames may be displayed with positive and negative polarities to help reduce charge accumulation effects. A charge accumulation tracker may analyze the image frames to determine when there is a risk of excess charge accumulation. The charge accumulation tracker may analyze information on gray levels, frame duration, and frame polarity. The charge accumulation tracker may compute a charge accumulation metric for entire image frames or may process subregions of each frame separately. When subregions are processed separately, each subregion may be individually monitored for a risk of excess charge accumulation.

公开(公告)号：US09262987B2

公开(公告)日：2016-02-16

申请号：US13801918

申请日：2013-03-13

Applicant: Apple Inc.

Inventor： Marc Albrecht ,  Christopher Philip Alan Tann ,  Nicholas G. Roland

IPC: G09G5/00

CPC classification number: G09G5/006 ,  G09G2320/0626 ,  G09G2330/022 ,  G09G2340/0435 ,  G09G2360/18

Abstract: A method is provided for compensating for brightness change in a display. The method includes storing a plurality of look-up tables (LUTs), where each table has a plurality of pixel levels at a variable refresh rate (VRR) and a plurality of brightness signals that provide compensation for the brightness change when refresh rate is changed during a panel self-refresh (PSR). The method also includes receiving an input signal from a graphics processing unit (GPU) and determining the VRR of the input signal from the GPU. The method further includes obtaining the LUT at the determined VRR of the input signal and adjusting the input signal to produce an output signal that compensates for the brightness change for each pixel or sub-pixel in a timing controller based upon the LUT at the determined VRR. The method further includes transmitting the output signal to the display. A system is also provided.

Abstract translation: 提供了一种补偿显示器亮度变化的方法。 该方法包括存储多个查找表（LUT），其中每个表具有可变刷新率（VRR）的多个像素级和当刷新率改变时为亮度改变提供补偿的多个亮度信号 在面板自刷新（PSR）期间。 该方法还包括从图形处理单元（GPU）接收输入信号并确定来自GPU的输入信号的VRR。 该方法还包括在确定的输入信号的VRR上获得LUT并调整输入信号以产生一个输出信号，该输出信号基于在所确定的VRR上的LUT来补偿定时控制器中的每个像素或子像素的亮度变化 。 该方法还包括将输出信号发送到显示器。 还提供了一个系统。

公开(公告)号：US11024243B2

公开(公告)日：2021-06-01

申请号：US17034894

申请日：2020-09-28

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Brijesh Tripathi ,  Christopher Philip Alan Tann ,  David S. Zalatimo ,  Guy Cote ,  Hao Nan ,  Marc Albrecht ,  Paolo Sacchetto ,  Sandro H. Pintz

IPC: G09G3/36

Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The image frames may be displayed with positive and negative polarities to help reduce charge accumulation effects. A charge accumulation tracker may analyze the image frames to determine when there is a risk of excess charge accumulation. The charge accumulation tracker may analyze information on gray levels, frame duration, and frame polarity. The charge accumulation tracker may compute a charge accumulation metric for entire image frames or may process subregions of each frame separately. When subregions are processed separately, each subregion may be individually monitored for a risk of excess charge accumulation.

公开(公告)号：US20210012733A1

公开(公告)日：2021-01-14

申请号：US17034894

申请日：2020-09-28

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Brijesh Tripathi ,  Christopher Philip Alan Tann ,  David S. Zalatimo ,  Guy Cote ,  Hao Nan ,  Marc Albrecht ,  Paolo Sacchetto ,  Sandro H. Pintz

IPC: G09G3/36

Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The image frames may be displayed with positive and negative polarities to help reduce charge accumulation effects. A charge accumulation tracker may analyze the image frames to determine when there is a risk of excess charge accumulation. The charge accumulation tracker may analyze information on gray levels, frame duration, and frame polarity. The charge accumulation tracker may compute a charge accumulation metric for entire image frames or may process subregions of each frame separately. When subregions are processed separately, each subregion may be individually monitored for a risk of excess charge accumulation.