公开(公告)号：US10534472B2

公开(公告)日：2020-01-14

申请号：US15687354

申请日：2017-08-25

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Wonjae Choi ,  Paolo Sacchetto

IPC: G06F3/044 ,  G06F3/041

Abstract: A touch screen is disclosed. A plurality of common electrodes can be configured to operate as display circuitry during a display phase, and to operate as touch sensing circuitry during a touch sensing phase. The plurality of common electrodes can include a first common electrode associated with a first display pixel, and a second common electrode associated with a second display pixel. Circuitry can be configured to update the first display pixel at a first time while driving the first common electrode but not the second common electrode, and update the second display pixel at a second time, after the first time, while driving the second common electrode but not the first common electrode. In some examples, the circuitry can be configured to leave the second common electrode floating while driving the first common electrode, and leave the first common electrode floating while driving the second common electrode.

公开(公告)号：US20190317659A1

公开(公告)日：2019-10-17

申请号：US16366503

申请日：2019-03-27

Applicant: Apple Inc.

Inventor： Paul V. Johnson ,  Ahmad Rahmati ,  Chaohao Wang ,  Cheng Chen ,  Graham B. Myhre ,  Jiaying Wu ,  Paolo Sacchetto ,  Sheng Zhang ,  Yunhui Hou ,  Xiaokai Li ,  Tim H. Cornelissen

IPC: G06F3/0484 ,  G06F3/01 ,  G06F3/0481

Abstract: An electronic device may include a display for displaying image content to a user and dynamic image stabilization circuitry for dynamically compensating the image content if the device is moving unpredictably to help keep the image content aligned with the user's gaze. The electronic device may include sensors for detecting the displacement of the device. The dynamic image stabilization circuitry may include a usage scenario detection circuit and a content displacement compensation calculation circuit. The usage scenario detection circuit receives data from the sensors and infers a usage scenario based on the sensor data. The content displacement compensation calculation circuit uses the inferred usage scenario to compute a displacement amount by which to adjust image content. When motion stops, the image content may gradually drift back to the center of the display.

公开(公告)号：US10395611B2

公开(公告)日：2019-08-27

申请号：US15701001

申请日：2017-09-11

Applicant: Apple Inc.

Inventor： Fenghua Zheng ,  Howard H. Tang ,  James C. Aamold ,  Sandro H. Pintz ,  Chaohao Wang ,  Paolo Sacchetto

IPC: G09G3/20 ,  G09G3/36

Abstract: Methods and systems for compensating for VCOM variations include determining a voltage change in pixels between frames to be displayed on an electronic display. Based on the determined voltage change, VCOM variation is calculated based on coupling the VCOM to one or more data lines of the electronic display. VCOM compensation is determined and applied to offset for the VCOM variation. Using the VCOM offset, subsequent pixel content for the one or more pixels is written using the compensated VCOM.

公开(公告)号：US20190244572A1

公开(公告)日：2019-08-08

申请号：US16265902

申请日：2019-02-01

Applicant: Apple Inc.

Inventor： Chengrui LE ,  Chaohao Wang ,  Li Tao ,  Lingyu Hong ,  Paolo Sacchetto ,  Sheng Zhang ,  Xiaokai Li ,  Yingying Tang ,  Yunhui Hou ,  Johan L. Piper

IPC: G09G3/34 ,  G09G3/36

CPC classification number: G09G3/3406 ,  G09G3/342 ,  G09G3/36 ,  G09G2320/0247 ,  G09G2320/0261 ,  G09G2320/041 ,  G09G2320/0606 ,  G09G2320/062 ,  G09G2320/0633 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2320/103 ,  G09G2340/0435 ,  G09G2354/00 ,  G09G2360/16

Abstract: Aspects of the subject technology relate to pulsed backlight operation for a display backlight. Backlight pulse patterns are provided that include steady state pulse patterns to be applied during operation of a liquid crystal display unit of the display at a corresponding frame rate. The backlight pulse patterns can be arranged to prevent visible artifacts such as flicker or strobing, particularly at or near a transition between LCD frame rates. In some scenarios, transition pulse patterns are provided,

公开(公告)号：US20190221177A1

公开(公告)日：2019-07-18

申请号：US16368394

申请日：2019-03-28

Applicant: Apple Inc.

Inventor： Jiayi Jin ,  Myung-Je Cho ,  Paolo Sacchetto ,  Weijun Yao

IPC: G09G3/36 ,  G09G3/20

CPC classification number: G09G3/3607 ,  G09G3/20 ,  G09G2310/0232 ,  G09G2320/0285 ,  G09G2320/0626

Abstract: A display may have curved edges such as rounded corners. Pixels in the display may be controlled so that the active area of the display has the desired curved edge shape. In order to maximize the apparent smoothness of the curved edge, the display may include circuitry that dims some of the pixels based on their location relative to a spline for the curved edge. The display circuitry may include a multiplication circuit that receives image data as a first input and dimming factors from a gain table as a second input. The image data may include a brightness level for each pixel in the array of pixels. The multiplication circuit may multiply the brightness level for each pixel by its respective dimming factor. This modified image data may then be supplied to the imaging pixels using display driver circuitry.

公开(公告)号：US20190189086A1

公开(公告)日：2019-06-20

申请号：US16326665

申请日：2017-08-14

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Bennett S. Wilburn ,  Paolo Sacchetto ,  Chaohao Wang ,  Cheng Chen ,  Enkhamgalan Dorjgotov

IPC: G09G5/36 ,  G09G5/10 ,  G06F3/147

CPC classification number: G09G5/363 ,  G06F3/147 ,  G09G3/3225 ,  G09G5/10 ,  G09G2310/08 ,  G09G2320/0261 ,  G09G2320/043 ,  G09G2320/0633 ,  G09G2320/064 ,  G09G2330/021 ,  G09G2340/0435 ,  G09G2354/00

Abstract: An electronic device may have a display such as an organic light-emitting diode display. Electronic devices may also include a number of sensors such as accelerometers and gaze detection sensors. A graphics processing unit (GPU) may render digital pixel values for pixels in the device display. Frames (F2) with long rendering times may cause latency. To reduce latency, an image frame may be displayed for an extended period of time (68) to wait for the subsequent frame (F2) to finish rendering. Once the subsequent image frame (F2) has finished rendering, the subsequent image frame may be displayed without delay. To increase the lifespan of the display, variable persistence may be used. Sensor data and other factors may be used to dynamically determine persistence for minimal motion blur and maximum display lifespan. Sensor data may also be used to determine refresh rates for different portions of the display.

公开(公告)号：US20190088204A1

公开(公告)日：2019-03-21

申请号：US16132322

申请日：2018-09-14

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Chih-Wei Yeh ,  Yunhui Hou ,  Chaohao Wang ,  Wei H. Yao ,  Paolo Sacchetto ,  Derek K. Shaeffer ,  Henry C. Jen ,  Shingo Hatanaka ,  Hasan Akyol ,  Mahdi Farrokh Baroughi ,  Hopil Bae

IPC: G09G3/3258

Abstract: A mobile electronic device includes a display having an active array and a reference array. The active array includes a pixel and the reference array includes a reference pixel. The mobile electronic device also includes processing circuitry communicatively coupled to the display. The processing circuitry is configured to instruct the active array to drive the pixel based at least in part on a current-voltage relationship of the pixel and a reference current-voltage relationship of the reference pixel.

公开(公告)号：US20190066569A1

公开(公告)日：2019-02-28

申请号：US15967892

申请日：2018-05-01

Applicant: Apple Inc.

Inventor： Yingying Tang ,  Chaohao Wang ,  Sheng Zhang ,  Yunhui Hou ,  Paolo Sacchetto ,  Koorosh Aflatooni ,  Gokhan Avkarogullari ,  Guy Cote ,  Mahesh B. Chappalli ,  Peter F. Holland

IPC: G09G3/20 ,  G09G5/06

Abstract: An electronic device is provided. The electronic device includes a display that is configured to show content that includes a plurality of frames. The plurality of frames includes a first frame that is associated with a pre-transition value. The plurality of frames also includes a second frame that is associated with a current frame value that corresponds to a first luminance. Additionally, the electronic device is configured to determine an overdriven current frame value corresponding to a second luminance that is greater than the first luminance. The electronic device is also configured to display the second frame using the overdriven current frame value.

公开(公告)号：US20190034026A1

公开(公告)日：2019-01-31

申请号：US16140532

申请日：2018-09-24

Applicant: Apple Inc.

Inventor： Chih-Wei Yeh ,  Chaohao Wang ,  Paolo Sacchetto ,  Wei Chen

IPC: G06F3/041 ,  G09G3/3258

Abstract: Devices and methods for improving image quality and decreasing power consumption of an electronic display are provided. The electronic device includes a display panel including a plurality of pixels configured to display an image, and to operate at multiple refresh rates. The electronic device also includes a processor configured to instruct the display panel to transition between the multiple refresh rates based at least in part on a blur effective width of the image.

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.