公开(公告)号：US20160260416A1

公开(公告)日：2016-09-08

申请号：US14636693

申请日：2015-03-03

Applicant: APPLE INC.

Inventor： Christopher P. Tann ,  David S. Zalatimo ,  Marc Albrecht ,  Sandro H. Pintz ,  Satish S. Iyengar

IPC: G09G5/18

CPC classification number: G09G5/005 ,  G09G2340/0407 ,  G09G2340/0435 ,  H04N7/0127

Abstract: One embodiment of the present disclosure describes an electronic display. The electronic display includes a display driver that write image frames to pixels of the electronic display with a first refresh rate or a second refresh rate, in which the second refresh rate is less than the first refresh rate. Additionally, the electronic display includes a timing controller that receives image frames from an image source, in which one or more of the image frames are configured to be displayed on the display panel to play video content; determines a capture rate of the video content based at least in part on a cadence with which the image frames are received, in which the capture rate describes a rate at which each of the one or more image frames was captured by an image sensor; and instructs the display driver to write the one or more of the image frames at the second refresh when the second refresh rate is an integer multiple of the capture rate.

Abstract translation: 本公开的一个实施例描述了电子显示器。 电子显示器包括显示驱动器，其以第一刷新率或第二刷新率将图像帧写入电子显示器的像素，其中第二刷新率小于第一刷新率。 此外，电子显示器包括定时控制器，其从图像源接收图像帧，其中一个或多个图像帧被配置为在显示面板上显示以播放视频内容; 至少部分地基于接收到图像帧的节奏来确定视频内容的捕获率，其中捕获速率描述一个或多个图像帧中的每一个被图像传感器捕获的速率; 并且当第二刷新率是捕获率的整数倍时，指示显示驱动器在第二次刷新时写入一个或多个图像帧。

公开(公告)号：US09390690B2

公开(公告)日：2016-07-12

申请号：US14319963

申请日：2014-06-30

Applicant: APPLE INC.

Inventor： Marc Albrecht ,  Christopher P. Tann

IPC: G09G3/20 ,  G09G5/393

CPC classification number: G09G3/2055 ,  G09G3/2003 ,  G09G3/2051 ,  G09G3/2066 ,  G09G5/393 ,  G09G2310/08 ,  G09G2320/0247 ,  G09G2320/0266 ,  G09G2330/021 ,  G09G2330/022 ,  G09G2340/0435

Abstract: Systems, methods, and device are provided to perform refresh-rate dependent dithering. One embodiment of the present disclosure describes a computing device that includes an image source that generates spatially dithered image data and an electronic display communicatively coupled to the image source. More specifically, the electronic display receives the spatially dithered image data from the image source and determines a refresh rate with which to display an image by comparing a local histogram and an artifact histogram, in which the local histogram describes pixel grayscale distribution of a portion of the image and the artifact histogram describes a pixel grayscale distribution that when displayed will cause a perceivable artifact. Additionally, when the determined refresh rate is less than a threshold refresh rate of the electronic device, the electronic display spatially dithers the image data without temporally dithering the image data and displays the image based at least in part on the spatially dithered image data.

Abstract translation: 提供系统，方法和设备来执行刷新速率相关的抖动。 本公开的一个实施例描述了一种计算设备，其包括生成空间抖动图像数据的图像源和通信地耦合到图像源的电子显示器。 更具体地，电子显示器从图像源接收空间抖动的图像数据，并且通过比较局部直方图和伪影直方图来确定用于显示图像的刷新率，其中局部直方图描述了一部分的像素灰度分布 图像和伪像直方图描述了像素灰度分布，当显示时会产生可察觉的神器。 此外，当确定的刷新率小于电子设备的阈值刷新率时，电子显示器在空间上抖动图像数据而不会暂时地抖动图像数据，并且至少部分地基于空间抖动的图像数据来显示图像。

公开(公告)号：US20160093239A1

公开(公告)日：2016-03-31

申请号：US14500646

申请日：2014-09-29

Applicant: APPLE INC.

Inventor： Chaohao Wang ,  Louis Luh ,  Jun Qi ,  Cheng Chen ,  Jun Jiang ,  Paolo Sacchetto ,  Marc Albrecht

IPC: G09G3/20 ,  G06F1/32

CPC classification number: G06F1/32 ,  G09G5/003 ,  G09G2320/0247 ,  G09G2330/021 ,  G09G2340/0435 ,  G09G2360/16

Abstract: Systems and methods for operating a display by dynamically determining a refresh rate for the display. In certain implementations, a processor determines a number of pixels having medium grayscale levels from a histogram for the image. If the number does not exceed a threshold, the processor sets a refresh rate for the display to a first refresh rate. In certain implementations, if the number exceeds a threshold, the processor may set the refresh rate for the display to a second refresh rate. Moreover, the first refresh rate may be lower than the second threshold. In some implementations, the image may be analyzed by subdividing the image into blocks and determining a refresh rate based on grayscale levels or distributions in the blocks. Based on the analysis of the blocks, a corresponding refresh rate may be selected.

Abstract translation: 通过动态地确定显示器的刷新率来操作显示器的系统和方法。 在某些实现中，处理器根据图像的直方图确定具有中等灰度等级的像素数。 如果号码不超过阈值，则处理器将显示器的刷新率设置为第一刷新率。 在某些实现中，如果数量超过阈值，则处理器可以将显示器的刷新率设置为第二刷新率。 此外，第一刷新率可以低于第二阈值。 在一些实现中，可以通过将图像细分为块并且基于块中的灰度等级或分布来确定刷新率来分析图像。 基于块的分析，可以选择相应的刷新率。

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：US11120747B2

公开(公告)日：2021-09-14

申请号：US16802756

申请日：2020-02-27

Applicant: Apple Inc.

Inventor： Koorosh Aflatooni ,  Warren S. Rieutort-Louis ,  Jean-Pierre S. Guillou ,  Pierre-Yves Emelie ,  Myung-Je Cho ,  Marc Albrecht ,  Graeme M. Williams ,  Sean C. Chang ,  Zhao Wang

IPC: G09G3/3275

Abstract: A display may have an active area that includes display pixels. The display may include an inactive notch region that extends into the active area. Data lines may provide image data from display driver circuitry to the display pixels. The image data may include data signals that correspond to portions of the display that do not include pixels, such as the inactive notch region. The null data signals may cause nonuniformities in the displayed image. The null data signals may be adjusted to minimize the nonuniformities. Null data signals corresponding to the inactive notch region may be adjusted to have gray levels that gradually decrease with distance from the border between the inactive notch and the active area. All of the data signals corresponding to the inactive notch may be set to a uniform gray level.

公开(公告)号：US20200335047A1

公开(公告)日：2020-10-22

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 ,  G02F1/1335

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.

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：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：US10665157B2

公开(公告)日：2020-05-26

申请号：US16374606

申请日：2019-04-03

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Shengkui Gao ,  Yingying Tang ,  Sean C. Chang ,  Mohammad B. Vahid Far ,  Kasra M. Omid-Zohoor ,  Chumin Zhao ,  Jingyu Huang ,  Mohammad Ali Jangda ,  Hyunwoo Nho ,  Chaohao Wang ,  Marc J. DeVincentis ,  Marc Albrecht ,  Warren S. Rieutort-Louis

IPC: G09G3/3208 ,  G09G3/20

Abstract: Systems and methods reduce likelihood of hysteresis that reduces perceived image quality of a subsequent image frame by toggling the display pixels to relax the display pixels by overwriting previous image frame data. During non-emission periods of the pixels, the pixels may be pre-toggled or exercised to improve response time and accuracy of the pixel. Data for pixels being programmed may also be used to pre-toggle other pixels reducing overhead but increasing cross-talk. Since the amount of cross-talk is related to content of the pixels being pre-toggled, a line buffer may be used to store image data for the pixels being pre-toggled. This stored image data may be used to determine how much pre-compensation is to be applied to data for the pixels being programmed. In other words, an amount of compensation applied is based at least in part on the content (e.g., greyscale levels) of the image data.

公开(公告)号：US10607549B2

公开(公告)日：2020-03-31

申请号：US15989066

申请日：2018-05-24

Applicant: Apple Inc.

Inventor： Koorosh Aflatooni ,  Warren S. Rieutort-Louis ,  Jean-Pierre S. Guillou ,  Pierre-Yves Emelie ,  Myung-Je Cho ,  Marc Albrecht ,  Graeme M. Williams ,  Sean C. Chang ,  Zhao Wang

IPC: G09G3/3275

Abstract: A display may have an active area that includes display pixels. The display may include an inactive notch region that extends into the active area. Data lines may provide image data from display driver circuitry to the display pixels. The image data may include data signals that correspond to portions of the display that do not include pixels, such as the inactive notch region. The null data signals may cause nonuniformities in the displayed image. The null data signals may be adjusted to minimize the nonuniformities. Null data signals corresponding to the inactive notch region may be adjusted to have gray levels that gradually decrease with distance from the border between the inactive notch and the active area. All of the data signals corresponding to the inactive notch may be set to a uniform gray level.