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公开(公告)号：US20160232833A1
公开(公告)日：2016-08-11
申请号：US14617564
申请日：2015-02-09
Applicant: APPLE INC.
Inventor： Chaohao Wang , David S. Zalatimo , Lei Zhao , Christopher P. Tann , Paolo Sacchetto , Sandro H. Pintz , Yi Huang , Jun Qi
IPC: G09G3/20
CPC classification number: G09G3/2092 , G09G3/20 , G09G2310/0254 , G09G2310/04 , G09G2310/08 , G09G2320/0266 , G09G2340/0435
Abstract: One embodiment describes an electronic display that displays image frames with a first refresh rate or a second refresh rate, in which the second refresh rate is lower than the first refresh rate; a display driver that writes the image frames by applying voltage to a display panel; and a timing controller that receives first image data from an image source, in which the first image data describes a first image frame and a first desired refresh rate equal to the second fresh rate; and that instructs the display driver to apply a first set of voltage polarities to the display panel to display first image frame at the first refresh rate and to apply a second set of voltage polarities to the display the first image frame at the second refresh rate when polarity of inversion imbalance accumulated is equal to polarity of the first set of voltage polarities.
Abstract translation: 一个实施例描述了一种电子显示器，其显示具有第一刷新率或第二刷新率的图像帧，其中第二刷新率低于第一刷新率; 通过向显示面板施加电压来写入图像帧的显示驱动器; 以及定时控制器，其从图像源接收第一图像数据，其中第一图像数据描述第一图像帧和等于第二新鲜率的第一期望刷新率; 并且指示显示驱动器将第一组电压极性施加到显示面板以以第一刷新率显示第一图像帧，并且以第二刷新率将第二组电压极性施加到第一图像帧， 累积的反转不平衡极性等于第一组电压极性的极性。
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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.
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公开(公告)号：US10762856B2
公开(公告)日：2020-09-01
申请号：US15893317
申请日：2018-02-09
Applicant: Apple Inc.
Inventor： Manev Luthra , Joseph P. Manca , Fenghua Zheng , David S. Zalatimo
Abstract: Aspects of the subject technology relate to electronic devices with displays. A display may include an array of display pixels and control circuitry for operating the display. The control circuitry may determine, based on pixel values for a row of display pixels, that a current in common supply voltage circuitry for the display pixels will exceed a threshold, if the row of display pixels is operated using the pixel values. The control circuitry may modify the pixel values for the row of display pixels to reduce the current in the common supply voltage circuitry and/or prevent the current in the common supply voltage circuitry from exceeding the threshold.
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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
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.
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公开(公告)号：US20200042264A1
公开(公告)日：2020-02-06
申请号：US16529705
申请日：2019-08-01
Applicant: Apple Inc.
Inventor： Fenghua Zheng , David S. Zalatimo , James E. Brown , Sachiko Oda , Johan L. Piper
Abstract: Aspects of the subject technology relate to electronic device display circuitry and methods of operating the display. The display circuitry a panel driver interface that decodes digital display data, for each display frame, received from host circuitry of the electronic device. The digital display data includes error correction and detection information for frame and line configuration information distributed in a frame packet and multiple line packets for each display frame. The frame and line configuration information facilitates, efficient, low-error, digital control of various display operational features.
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Patent Agency Ranking
公开(公告)号：US09940896B2
公开(公告)日：2018-04-10
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
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.
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公开(公告)号：US20180090084A1
公开(公告)日：2018-03-29
申请号：US15698343
申请日：2017-09-07
Applicant: Apple Inc.
Inventor： Fenghua Zheng , Christopher P. Tann , Sandro H. Pintz , David S. Zalatimo , Jun Qi , Zhibing Ge
CPC classification number: G09G3/3611 , G06T5/008 , G09G3/3614 , G09G3/3696 , G09G2310/0291 , G09G2320/0276 , G09G2320/0673 , G09G2340/0435 , G09G2360/02 , G09G2360/16
Abstract: Devices and methods for useful in providing localized synchronized and/or dynamic in-band internal gamma code adjustment per frame period are provided. By way of example, a display panel includes a data driver, which includes a first DAC configured to provide an internal gamma voltage signal to cause a first adjustment to an image data signal. The first adjustment is configured to selectively adjust the image data signal based at least in part on a refresh rate or a frame rate of the display panel. The data driver includes a second DAC coupled to the first DAC and configured to provide an external gamma voltage signal configured to provide a second adjustment to the image data signal, and an output buffer configured to supply the image data signal to pixels of the display panel, wherein the image data signal comprises the first adjustment and the second adjustment.
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公开(公告)号：US09830849B2
公开(公告)日：2017-11-28
申请号：US14617564
申请日：2015-02-09
Applicant: APPLE INC.
Inventor： Chaohao Wang , David S. Zalatimo , Lei Zhao , Christopher P. Tann , Paolo Sacchetto , Sandro H. Pintz , Yi Huang , Jun Qi
CPC classification number: G09G3/2092 , G09G3/20 , G09G2310/0254 , G09G2310/04 , G09G2310/08 , G09G2320/0266 , G09G2340/0435
Abstract: One embodiment describes an electronic display that displays image frames with a first refresh rate or a second refresh rate, in which the second refresh rate is lower than the first refresh rate; a display driver that writes the image frames by applying voltage to a display panel; and a timing controller that receives first image data from an image source, in which the first image data describes a first image frame and a first desired refresh rate equal to the second fresh rate; and that instructs the display driver to apply a first set of voltage polarities to the display panel to display first image frame at the first refresh rate and to apply a second set of voltage polarities to the display the first image frame at the second refresh rate when polarity of inversion imbalance accumulated is equal to polarity of the first set of voltage polarities.
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公开(公告)号：US09743036B2
公开(公告)日：2017-08-22
申请号：US14659723
申请日：2015-03-17
Applicant: APPLE INC.
Inventor： Christopher P. Tann , Chaohao Wang , David S. Zalatimo , Marc Albrecht , Paolo Sacchetto , Sandro H. Pintz , Satish S. Iyengar
CPC classification number: H04N7/0127 , G06F1/3218 , G06F1/3265 , G09G5/001 , G09G2330/021 , H04N7/0115 , Y02D10/153
Abstract: Systems and methods for controlling operation of an electronic display are provided. One embodiment describes an electronic display, which includes a display driver that writes image frames to pixels of the electronic display with a first refresh rate or a second refresh rate; and a timing controller that receives a plurality of image frames from an image source, in which the plurality of image frames are displayed on the electronic display to play video content; detects a cadence with which the plurality of image frames are received from the image source; and, based at least in part on the cadence of the plurality of image frames, instructs the display driver to write each of the plurality of image frames either as a single image frame at the first refresh rate or an image frame at the first refresh rate followed by a repeat of the image frame at the second refresh rate.
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公开(公告)号：US20160117971A1
公开(公告)日：2016-04-28
申请号：US14986181
申请日：2015-12-31
Applicant: Apple Inc.
Inventor： Paolo Scchetto , Christopher P. Tann , Taesung Kim , Sandro H. Pintz , Marc Albrecht , Chaohao Wang , David S. Zalatimo , Fenghua Zheng , Zhibing Ge
IPC: G09G3/20
CPC classification number: G09G3/20 , G09G2310/0254 , G09G2310/063 , G09G2310/08 , G09G2320/0204 , G09G2340/0435
Abstract: System and method for improving displayed image quality of an electronic display that displays a first image frame by applying a first voltage to a display pixel and a second image frame directly before the first image frame by applying a second voltage to the display pixel. A display pipeline is communicatively coupled to the electronic display and receives first image data corresponding with the first image frame, where the image data includes a first grayscale value corresponding with the display pixel. Additionally the display pipeline determines an inversion balancing grayscale offset based at least in part on the first grayscale value when polarity of the first voltage and polarity of the second voltage are the same and determines magnitude of the first voltage by applying the inversion balancing grayscale offset to the first grayscale value to reduce likelihood of a perceivable luminance spike when displaying the first image frame.
Abstract translation: 一种用于通过向显示像素施加第二电压来提高通过对第一图像帧之前的显示像素和第二图像帧施加第一电压来显示第一图像帧的电子显示器的显示图像质量的系统和方法。 显示管线通信地耦合到电子显示器并接收与第一图像帧对应的第一图像数据，其中图像数据包括与显示像素对应的第一灰度值。 此外，当第一电压的极性和第二电压的极性相同时，至少部分地基于第一灰度值，显示管线确定反转平衡灰度偏移，并且通过将反转平衡灰度偏移应用于第一电压的幅度来确定第一电压的幅度 第一灰度值，以在显示第一图像帧时降低可感知的亮度尖峰的可能性。
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