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公开(公告)号：US11967291B1
公开(公告)日：2024-04-23
申请号：US18328250
申请日：2023-06-02
Applicant: Apple Inc.
Inventor： Mohammad Tofighi , Meng Cao , Pierre-Yves Emelie , Duane M Petrovich , Shuo Han , Zhendong Hong , Tobias Jung , Marc Albrecht , Jiulong Shan , Wei H Yao
IPC: G09G3/34 , G02F1/1335 , G02F1/13357 , G06V10/764 , G06V10/82
CPC classification number: G09G3/3426 , G02F1/133603 , G02F1/133612 , G06V10/764 , G06V10/82 , G09G2320/0613 , G09G2320/0626 , G09G2320/066 , G09G2360/16
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 (LEDs). The backlight unit may determine the type of content in the image data. The backlight unit may decide to prioritize either mitigating halo or mitigating clipping based on the type of content. The determination of the type of content in the image data may be used to determine the brightness values for the LEDs in the LED array. If the content is determined to be a first type of content, at least one given LED in the LED array may have a different brightness value than if the content is determined to be a second, different type of content. Classifying content in the image data may be useful in optimizing visible artifacts such as visible halo and clipping.
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公开(公告)号：US10482806B2
公开(公告)日：2019-11-19
申请号：US14635763
申请日：2015-03-02
Applicant: APPLE INC.
Inventor： Marc Albrecht , David S. Zalatimo , Christopher P. Tann , Sandro H. Pintz
IPC: G09G3/20
Abstract: Devices and methods for reducing or eliminating spatiotemporal dithering image artifacts are provided. By way of example, a method includes providing positive polarity and negative polarity data signals to a plurality of pixels of a display during a first frame period, in which the first frame period corresponds a first spatiotemporal rotation phase. The method includes providing the positive polarity signals and the negative polarity signals to the plurality of pixels of the display during a second frame period, in which the second frame period corresponds a second spatiotemporal rotation phase. A spatiotemporal rotation phase sequence provided to the display comprises the first spatiotemporal rotation phase and the second spatiotemporal rotation phase. One of the first spatiotemporal rotation phase and the second spatiotemporal rotation phase of the spatiotemporal rotation phase sequence is altered during the first frame period or the second time period.
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公开(公告)号：US10276085B2
公开(公告)日：2019-04-30
申请号：US14973517
申请日：2015-12-17
Applicant: Apple Inc.
Inventor： Chaohao Wang , Paolo Sacchetto , Marc Albrecht , Christopher P. Tann , Shih-Chyuan Fan Jiang , Howard H. Tang , James E. C. Brown , Zhibing Ge
IPC: G09G3/20
Abstract: This application relates to systems, methods, and apparatus for compensating voltage for pixels of a display panel based on the location of the pixels within the display panel. An amount of voltage compensation is assigned to each pixel or a group of pixels within the display panel in accordance with a calibration of the display panel. During operation of the display panel, pixel data is generated for a location of the display panel, and the pixel data is modified according to the amount of voltage compensation corresponding to the location. By modifying the pixel data in this way, spatial variations in voltage across the display panel can be mitigated in order to reduce the occurrence of certain display artifacts at the display panel.
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公开(公告)号：US10242649B2
公开(公告)日：2019-03-26
申请号：US15664940
申请日：2017-07-31
Applicant: Apple Inc.
Inventor： Mahesh B. Chappalli , Chaohao Wang , Guy Côté , Marc Albrecht
Abstract: Systems and methods for improving displayed image quality of an electronic display including a display pixel and a display driver are provided. A display pipeline receives input image data that indicates target luminance of the display pixel when displaying an image frame on the electronic display; determines a first bit group in pixel response corrected image data by mapping a first bit group in the input image data based at least in part on a first pixel response correction look-up-table; determines a second bit group in the pixel response corrected image data by mapping a second bit group in the input image data based at least in part on a second pixel response correction look-up-table; and outputs the pixel response corrected image data to the display driver to enable the display driver to facilitate displaying the image frame by writing the display pixel based on the pixel response corrected image data.
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公开(公告)号：US20180082626A1
公开(公告)日：2018-03-22
申请号：US15655591
申请日：2017-07-20
Applicant: APPLE INC.
Inventor： Marc Albrecht , Mahesh B. Chappalli , Christopher P. Tann , Jim C. Chou , Guy Cote
IPC: G09G3/20 , G09G3/36 , G09G3/3208
CPC classification number: G09G3/2055 , G09G3/2003 , G09G3/2051 , G09G3/2059 , G09G3/3208 , G09G3/3607 , G09G3/3614 , G09G2300/0452 , G09G2320/0242 , G09G2320/0257
Abstract: Devices and methods for error diffusion and spatiotemporal dithering are provided. By way of example, a method of operating a display includes receiving a pixel input, a set of pixel coordinates, and a current frame number. A kernel and a particular kernel bit of the kernel is selected from a set of kernels, based upon the pixel input, the pixel coordinates, the frame number, or any combination thereof. A dithered output is determined based at least in part upon the kernel bit. When the display is in a diamond pixel configuration, the dithered output is applied in accordance with a diamond pattern formed by red, blue, or red and blue pixel channels.
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Patent Agency Ranking
公开(公告)号：US20180081234A1
公开(公告)日：2018-03-22
申请号：US15677267
申请日：2017-08-15
Applicant: Apple Inc.
Inventor： Hung Sheng Lin , Jesse A. Richmond , Mohammad B. Vahid Far , Tobias Jung , Jie Won Ryu , Hyunwoo Nho , Kingsuk Brahma , Sun-Il Chang , Junhua Tan , Marc Albrecht , Chih-Wei Yeh , Chaohao Wang
IPC: G02F1/1333 , G09G3/36 , G09G3/20
CPC classification number: G02F1/133385 , G09G3/2048 , G09G3/3233 , G09G3/3633 , G09G2320/0233 , G09G2320/0285 , G09G2320/029 , G09G2320/0295 , G09G2320/041 , G09G2320/043 , G09G2320/045
Abstract: Devices, storage media, and methods for compensating for aging and temperature variations using dual-loop compensation are provided. The compensating for temperature and aging variations of one or more pixels of the display using a coarse scan loop updated at a faster rate. Compensation also includes compensating for aging variations of the one or more pixels of the display using a fine scan loop updated at a slower rate.
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公开(公告)号：US20170039967A1
公开(公告)日：2017-02-09
申请号：US14818001
申请日：2015-08-04
Applicant: Apple Inc.
Inventor： Tobias Jung , Marc Albrecht , Sandro H. Pintz
CPC classification number: G09G3/3648 , G06T5/007 , G06T5/40 , G09G3/3406 , G09G3/3426 , G09G2320/0233 , G09G2320/0646 , G09G2320/066 , G09G2360/16
Abstract: Methods, systems, and devices for improving contrast, dynamic range, and power consumption of a backlight in a display are provided. By way of example, a method includes receiving image data to be displayed on pixels of a display panel, generating a global histogram of the image data, generating a plurality of thresholds based on the global histogram, and defining a first threshold and a second threshold of the plurality of thresholds as local thresholds based on the global histogram and a local histogram. The first threshold and the second threshold are generated according to a local tone mapping function. The method further includes adjusting a luminance of one or more of pixels of the display panel based at least in part on the first threshold and the second threshold.
Abstract translation: 提供了用于改善显示器中的背光的对比度，动态范围和功率消耗的方法，系统和设备。 作为示例，一种方法包括接收要在显示面板的像素上显示的图像数据，生成图像数据的全局直方图，基于全局直方图生成多个阈值，以及定义第一阈值和第二阈值 的多个阈值作为基于全局直方图和局部直方图的局部阈值。 根据本地色调映射功能生成第一阈值和第二阈值。 该方法还包括至少部分地基于第一阈值和第二阈值来调整显示面板的一个或多个像素的亮度。
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公开(公告)号：US20160260387A1
公开(公告)日：2016-09-08
申请号：US14635763
申请日：2015-03-02
Applicant: APPLE INC.
Inventor： Marc Albrecht , David S. Zalatimo , Christopher P. Tann , Sandro H. Pintz
CPC classification number: G09G3/2044 , G09G3/2051 , G09G3/2055 , G09G2320/0271
Abstract: Devices and methods for reducing or eliminating spatiotemporal dithering image artifacts are provided. By way of example, a method includes providing positive polarity and negative polarity data signals to a plurality of pixels of a display during a first frame period, in which the first frame period corresponds a first spatiotemporal rotation phase. The method includes providing the positive polarity signals and the negative polarity signals to the plurality of pixels of the display during a second frame period, in which the second frame period corresponds a second spatiotemporal rotation phase. A spatiotemporal rotation phase sequence provided to the display comprises the first spatiotemporal rotation phase and the second spatiotemporal rotation phase. One of the first spatiotemporal rotation phase and the second spatiotemporal rotation phase of the spatiotemporal rotation phase sequence is altered during the first frame period or the second time period.
Abstract translation: 提供了用于减少或消除时空抖动图像伪影的装置和方法。 作为示例，一种方法包括在第一帧周期期间向显示器的多个像素提供正极性和负极性数据信号，其中第一帧周期对应于第一时空旋转相位。 该方法包括在第二帧周期期间向显示器的多个像素提供正极性信号和负极性信号，其中第二帧周期对应于第二时空旋转相位。 提供给显示器的时空旋转相位序列包括第一时空旋转相位和第二时空旋转相位。 时空旋转相位序列的第一个时空旋转相位和第二时空旋转相位之一在第一帧周期或第二时间段期间被改变。
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公开(公告)号：US20150379970A1
公开(公告)日：2015-12-31
申请号：US14319963
申请日：2014-06-30
Applicant: APPLE INC.
Inventor： Marc Albrecht , Christopher P. Tann
IPC: 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。
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公开(公告)号：US08970468B2
公开(公告)日：2015-03-03
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。
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