公开(公告)号：US20140354521A1

公开(公告)日：2014-12-04

申请号：US13903179

申请日：2013-05-28

Applicant: Apple Inc.

Inventor： Gabriel Marcu ,  Marc Albrecht ,  Sandro H. Pintz

IPC: G09G3/32

CPC classification number: G09G3/3208 ,  G09G3/2003 ,  G09G2300/0452 ,  G09G2340/06

Abstract: An electronic device may include a display having an array of display pixels. Storage and processing circuitry may generate display data for the display in an RGB input color space. The display may display the display data in an RGBW output color space. Display control circuitry may use sets of predetermined conversion factors to convert display data from the RGB input color space to the RGBW output color space without requiring conversion to a device-independent color space. Each set of predetermined conversion factors may be associated with a color in a set of predetermined colors. Using the sets of predetermined conversion factors, the display control circuitry may convert RGB values in the input color space to RGBW values in the output color space. The display control circuitry may supply data signals corresponding to the display data in the RGBW output color space to the array of display pixels.

Abstract translation: 电子设备可以包括具有显示像素阵列的显示器。 存储和处理电路可以在RGB输入颜色空间中生成用于显示的显示数据。 显示器可以在RGBW输出颜色空间中显示显示数据。 显示控制电路可以使用一组预定的转换因子将来自RGB输入色彩空间的显示数据转换为RGBW输出色彩空间，而不需要转换为与设备无关的色彩空间。 每组预定转换因子可以与一组预定颜色中的颜色相关联。 使用这些预定转换因子的集合，显示控制电路可以将输入颜色空间中的RGB值转换为输出颜色空间中的RGBW值。 显示控制电路可以将与RGBW输出颜色空间中的显示数据相对应的数据信号提供给显示像素阵列。

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：US20140198093A1

公开(公告)日：2014-07-17

申请号：US14155300

申请日：2014-01-14

Applicant: Apple Inc.

Inventor： Prasanna Nambi ,  Jason N. Gomez ,  Fenghua Zheng ,  Paolo Sacchetto ,  Sandro H. Pintz ,  Taesung Kim ,  Christopher P. Tann ,  Marc Albrecht ,  David W. Lum

IPC: G09G3/36

CPC classification number: G09G3/3618 ,  G06T1/20 ,  G06T2210/52 ,  G09G3/36 ,  G09G3/3611 ,  G09G3/3648 ,  G09G3/3655 ,  G09G3/3696 ,  G09G2310/08 ,  G09G2320/0626 ,  G09G2330/02 ,  G09G2330/021 ,  G09G2340/0435 ,  G09G2360/18 ,  G09G2370/08

Abstract: The disclosure describes procedures for dynamically employing a variable refresh rate at an LCD display of a consumer electronic device, such as a laptop computer, a tablet computer, a mobile phone, or a music player device. In some configurations, the consumer electronic device can include a host system portion, having one or more processors and a display system portion, having a timing controller, a buffer circuit, a display driver, and a display panel. The display system can receive image data and image control data from a GPU of the host system, evaluate the received image control data to determine a reduced refresh rate (RRR) for employing at the display panel, and then transition to the RRR, whenever practicable, to conserve power. In some scenarios, the transition to the RRR can be a transition from a LRR of 50 hertz or above to a RRR of 40 hertz or below.

公开(公告)号：US20140139571A1

公开(公告)日：2014-05-22

申请号：US13683523

申请日：2012-11-21

Applicant: APPLE INC.

Inventor： Marc Albrecht ,  Ulrich Barnhoefer ,  Gabriel Marcu ,  Sandro H. Pintz

IPC: G09G5/02

CPC classification number: G09G5/02 ,  G09G2320/041 ,  G09G2320/0666 ,  G09G2320/0693 ,  G09G2360/144

Abstract: An electronic device may include a display and display control circuitry. The display may be calibrated to compensate for changes in display temperature. Display calibration information may be obtained during manufacturing and may be stored in the electronic device. The display calibration information may include color-specific adjustment factors configured to adjust display colors and reduce temperature-related color shifts. During operation of the display, the display control circuitry may receive input pixel values for a display pixel. The display control circuitry may also receive display temperature information from a temperature sensor in the electronic device. The display control circuitry may determine adjustment factors based on a color associated with the input pixel values and the display temperature information. The display control circuitry may apply the adjustment factors to the input pixel values to obtain adapted pixel values. The adapted pixel values may be provided to the display pixel.

Abstract translation: 电子设备可以包括显示和显示控制电路。 可以校准显示器以补偿显示温度的变化。 显示校准信息可以在制造过程中获得，并且可以存储在电子设备中。 显示校准信息可以包括被配置为调整显示颜色并减少与温度相关的颜色偏移的颜色特定调整因子。 在显示器的操作期间，显示控制电路可以接收用于显示像素的输入像素值。 显示控制电路还可以从电子设备中的温度传感器接收显示温度信息。 显示控制电路可以基于与输入像素值和显示温度信息相关联的颜色来确定调整因子。 显示控制电路可以将调整因子应用于输入像素值以获得适应的像素值。 可以将适应的像素值提供给显示像素。

公开(公告)号：US20140139570A1

公开(公告)日：2014-05-22

申请号：US13683201

申请日：2012-11-21

Applicant: APPLE INC.

Inventor： Marc Albrecht ,  Ulrich Barnhoefer ,  Gabriel Marcu ,  Sandro H. Pintz ,  Keith Cox

IPC: G09G5/02

CPC classification number: G09G5/06 ,  G09G3/2003 ,  G09G2320/0242 ,  G09G2320/041 ,  G09G2320/0666 ,  G09G2320/0693 ,  G09G2360/144

Abstract: An electronic device may include a display and display control circuitry. The display may be calibrated to compensate for changes in display temperature. Display calibration information may be obtained during manufacturing and may be stored in the electronic device. The display calibration information may include adjustment factors configured to adjust incoming pixel values to reduce temperature-related color shifts. During operation of the electronic device, display control circuitry may determine the temperature at different locations on the display. The display control circuitry may determine the temperature at a given display pixel using the temperatures at the different locations on the display. The display control circuitry may determine adjustment values based on the temperature at the display pixel. The display control circuitry may apply the adjustment values to incoming pixel values to obtain adapted pixel values, which may in turn be provided to the display pixel.

Abstract translation: 电子设备可以包括显示和显示控制电路。 可以校准显示器以补偿显示温度的变化。 显示校准信息可以在制造过程中获得，并且可以存储在电子设备中。 显示校准信息可以包括被配置为调整输入像素值以减少温度相关颜色偏移的调节因子。 在电子设备的操作期间，显示控制电路可以确定显示器上不同位置处的温度。 显示控制电路可以使用显示器上不同位置处的温度来确定给定显示像素处的温度。 显示控制电路可以基于显示像素处的温度来确定调整值。 显示控制电路可以将调整值应用于输入像素值，以获得适应的像素值，其可依次提供给显示像素。

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.

公开(公告)号：US10733942B2

公开(公告)日：2020-08-04

申请号：US16044408

申请日：2018-07-24

Applicant: Apple Inc.

Inventor： Francisco H. Imai ,  Chi Zhang ,  Adria Fores Herranz ,  Jiaying Wu ,  Arthur L. Spence ,  Marc Albrecht

IPC: G09G5/10 ,  G09G3/34 ,  G09G3/20

Abstract: Aspects of the subject technology relate to electronic devices with displays and ambient light sensors. An electronic device modifies the color of images to be displayed based on measured ambient light color. The modification is performed in a perceptually uniform color space and includes a determination of a bleaching effect of reflected ambient light, and a determination of a color correction factor to be applied within the perceptually uniform color space, based on the determined bleaching effect. The modification may also include an application of a strength factor that mitigates out-of-gamut colors in color compensated images.

公开(公告)号：US10714049B2

公开(公告)日：2020-07-14

申请号：US15701086

申请日：2017-09-11

Applicant: Apple Inc.

Inventor： Myung-Je Cho ,  Jim Chou ,  Marc Albrecht ,  Jean-Pierre Guillou

IPC: G09G5/10 ,  G09G5/39 ,  G09G5/02 ,  G09G5/00 ,  G06T5/00

Abstract: Systems and methods for improving perceived image quality of an electronic display, which includes a display region with a rounded border and a display pixel at a pixel position adjacent the rounded border. A display pipeline communicatively coupled to the electronic display receives first image data that indicates target luminance at the pixel position in a rectangular image frame; determines a gain value associated with the pixel position from a gain map, in which the gain value is inversely proportional to distance between the display pixel and the rounded border; determines second image data that indicates target luminance of the display pixel by processing the first image data based at least in part on the gain value; and outputs the second image data to the electronic display to facilitate displaying a non-rectangular portion of the image frame on the display region.

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.