公开(公告)号：US20190172399A1

公开(公告)日：2019-06-06

申请号：US16323751

申请日：2017-08-14

Applicant: Apple Inc.

Inventor： Cheng Chen ,  Jason C. Sauers ,  Fletcher R. Rothkopf ,  David W. Lum ,  Chun-Yao Huang ,  Enkhamgalan Dorjgotov ,  Graham B. Myhre ,  Bennett S. Wilburn ,  Paolo Sacchetto ,  Shih Chang Chang ,  Wonjae Choi ,  Cheuk Chi Lo

IPC: G09G3/3266 ,  G09G3/3275 ,  G09G3/36

Abstract: An electronic device such as a head-mounted device may have displays. The display may have regions of lower (L) and higher (M, H) resolution to reduce data bandwidth and power consumption for the display while preserving satisfactory image quality. Data lines may be shared by lower and higher resolution portions of a display or different portions of a display with different resolutions may be supplied with different numbers of data lines. Data line length may be varied in transition regions between lower resolution and higher resolution portions of a display to reduce visible discontinuities between the lower and higher resolution portions. The lower and higher resolution portions of the display may be dynamically adjusted using dynamically adjustable gate driver circuitry and dynamically adjustable data line driver circuitry.

公开(公告)号：US10283062B2

公开(公告)日：2019-05-07

申请号：US15767637

申请日：2017-07-17

Applicant: Apple Inc.

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

IPC: G09G3/36 ,  G09G3/20

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：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.

公开(公告)号：US10248257B2

公开(公告)日：2019-04-02

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 ,  G09G3/36 ,  G09G3/20 ,  G09G3/3208 ,  G06F3/0488 ,  G06F3/0354 ,  G06F1/3234

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：US20190088199A1

公开(公告)日：2019-03-21

申请号：US16132320

申请日：2018-09-14

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Chengrui Le ,  Hopil Bae ,  Mahdi Farrokh Baroughi ,  David W. Lum ,  Adam Adjiwibawa ,  Chaohao Wang ,  Paolo Sacchetto ,  Wei H. Yao ,  Enkhamgalan Dorjgotov ,  Michael Slootsky ,  Giovanni Carbone ,  Derek K. Shaeffer ,  Henry C. Jen ,  Shingo Hatanaka ,  Hasan Akyol

IPC: G09G3/3233 ,  G09G3/3258

Abstract: An electronic device includes a display having a reference array that includes a first pixel. The display also includes a first emission power supply coupled to the first pixel. The display further includes an active array having a second pixel. The display also includes a second emission power supply coupled to the second pixel.

公开(公告)号：US20180336863A1

公开(公告)日：2018-11-22

申请号：US15842364

申请日：2017-12-14

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Chaohao Wang ,  Paolo Sacchetto ,  Yunhui Hou

IPC: G09G3/36

CPC classification number: G09G3/3696 ,  G09G3/3648 ,  G09G3/3655 ,  G09G2300/0426 ,  G09G2320/02 ,  G09G2320/0219 ,  G09G2320/0223 ,  G09G2320/0247 ,  G09G2320/029 ,  G09G2360/145

Abstract: The present disclosure relates to systems and methods of accounting for the kickback voltage in an LCD display. For example, a method may include obtaining, via a processor, a difference between a nominal voltage of a common electrode of a display and a measured voltage of the common electrode. The processor may obtain image data associated with an image to be displayed on the display. The processor may adjust the image data of a pixel of the display based on the difference. The processor may output an image signal indicative of the adjusted image data to a pixel electrode of the pixel.

公开(公告)号：US09997121B2

公开(公告)日：2018-06-12

申请号：US14718515

申请日：2015-05-21

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Hao Nan ,  Paolo Sacchetto ,  Zhibing Ge

IPC: G09G3/36

CPC classification number: G09G3/3614 ,  G09G3/3648 ,  G09G2320/0204 ,  G09G2320/0247 ,  G09G2320/0257 ,  G09G2320/041 ,  G09G2330/021 ,  G09G2340/0435 ,  G09G2340/16 ,  G09G2360/18

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. 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 implement a physically derived circuit model of the pixels. A charge accumulation input response matrix and a charge accumulation state response matrix for the model may be stored in look-up table circuitry and used in computing a current charge accumulation state based on current pixel voltage information and previous state information. The impact of temperature, backlight illumination level, frame duration, and other factors may be taken into account in evaluating the current charge accumulation state.

公开(公告)号：US20180004340A1

公开(公告)日：2018-01-04

申请号：US15275375

申请日：2016-09-24

Applicant: APPLE INC.

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

IPC: G06F3/041 ,  G09G3/3258 ,  G09G3/36

CPC classification number: G06F3/0416 ,  G06F1/3262 ,  G06F3/03545 ,  G06F3/03547 ,  G06F3/0488 ,  G09G3/20 ,  G09G3/3208 ,  G09G3/3258 ,  G09G3/3648 ,  G09G2310/08 ,  G09G2320/0261 ,  G09G2320/103 ,  G09G2320/106 ,  G09G2330/021 ,  G09G2340/0435

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：US09824615B2

公开(公告)日：2017-11-21

申请号：US14732764

申请日：2015-06-07

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Wonjae Choi ,  Sandro H. Pintz ,  Paolo Sacchetto

IPC: G09G5/00 ,  G09G3/20 ,  G09G3/3208 ,  G06F1/32 ,  G09G3/36

CPC classification number: G09G3/20 ,  G06F1/3234 ,  G06F1/3265 ,  G09G3/3208 ,  G09G3/3614 ,  G09G2330/021 ,  G09G2330/022 ,  G09G2360/08 ,  G09G2360/16 ,  G09G2360/18 ,  Y02B70/16

Abstract: This application relates to systems, methods, and apparatus for optimizing the operations of a power converter of a display panel based on image data to be output by the display panel. The power converter can include one or more switches that can be activated or deactivated based on the image data in order to shift a power efficiency of the power converter. Power efficiency is shifted as a result of balancing an amount of charge necessary for a load with an amount of resistance created when activating switches of the power converter. Therefore, by dynamically altering a configuration of a power converter based on image data, power efficiency of the power converter can be improved.

公开(公告)号：US09818367B2

公开(公告)日：2017-11-14

申请号：US14660619

申请日：2015-03-17

Applicant: APPLE INC.

Inventor： Hung Sheng Lin ,  Chaohao Wang ,  Paolo Sacchetto

IPC: G09G3/36

CPC classification number: G09G3/3696 ,  G09G3/3648 ,  G09G3/3688 ,  G09G2310/027 ,  G09G2310/0289 ,  G09G2310/0291 ,  G09G2320/0209 ,  G09G2320/029 ,  G09G2330/06 ,  G09G2330/08

Abstract: Devices and methods related to liquid crystal displays (LCDs) are provided. For example, such an electronic device may include an LCD with a slew rate control unit that adjusts a slew rate for source drivers of the LCD. The slew rate may be adjusted differently for each source driver and for each frame of data signal delivered by the source driver. Individually adjusting the slew rate of the source driver enables the LCD to respond to or reduce noise within the LCD that may otherwise contribute to flickering or other unwanted display events.