公开(公告)号：US10650741B2

公开(公告)日：2020-05-12

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 ,  G09G3/3208

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：US20200074900A1

公开(公告)日：2020-03-05

申请号：US16403366

申请日：2019-05-03

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Chaohao Wang ,  Michael Slootsky ,  Yifan Zhang ,  Tae-Wook Koh

IPC: G09G3/00 ,  G09G3/3208 ,  G09G3/36

Abstract: A flat-panel display device and method to prevent display panel burn-in through a decimated look-up table with pixel shifting in a display or an augmented reality display.

公开(公告)号：US10580381B2

公开(公告)日：2020-03-03

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

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：US10520763B2

公开(公告)日：2019-12-31

申请号：US15703843

申请日：2017-09-13

Applicant: Apple Inc.

Inventor： Shih-Chyuan Fan Jiang ,  Zhibing Ge ,  Lei Zhao ,  Chaohao Wang ,  Paul P. Lu

IPC: G02F1/1333 ,  G02F1/1337 ,  G02F1/1343 ,  G09G3/36 ,  H01L27/12 ,  H01L29/66 ,  G02F1/1368 ,  G02F1/1362

Abstract: Liquid crystal display systems and methods of operation are described. In an embodiment, a liquid crystal display pixel cell includes an insulation layer spanning over a passivation layer and the plurality of signal electrodes such that it separates the signal electrodes from polymer alignment layer for the liquid crystal. In an embodiment, a method of operating a liquid crystal display panel includes temporal compensation of the Vcom value as a function of time and one or more operating parameters.

公开(公告)号：US20190325816A1

公开(公告)日：2019-10-24

申请号：US16374606

申请日：2019-04-03

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Shengkui Gao ,  Yingying Tang ,  Sean C. Chang ,  Mohammad B. Vahid Far ,  Kasra M. Omid-Zohoor ,  Chumin Zhao ,  Jingyu Huang ,  Mohammad Ali Jangda ,  Hyunwoo Nho ,  Chaohao Wang ,  Marc J. DeVincentis ,  Marc Albrecht ,  Warren S. Rieutort-Louis

IPC: G09G3/3208 ,  G09G3/20

Abstract: Systems and methods reduce likelihood of hysteresis that reduces perceived image quality of a subsequent image frame by toggling the display pixels to relax the display pixels by overwriting previous image frame data. During non-emission periods of the pixels, the pixels may be pre-toggled or exercised to improve response time and accuracy of the pixel. Data for pixels being programmed may also be used to pre-toggle other pixels reducing overhead but increasing cross-talk. Since the amount of cross-talk is related to content of the pixels being pre-toggled, a line buffer may be used to store image data for the pixels being pre-toggled. This stored image data may be used to determine how much pre-compensation is to be applied to data for the pixels being programmed. In other words, an amount of compensation applied is based at least in part on the content (e.g., greyscale levels) of the image data.

公开(公告)号：US10319279B2

公开(公告)日：2019-06-11

申请号：US15438448

申请日：2017-02-21

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Paolo Sacchetto ,  Sheng Zhang ,  Yang Li ,  Myung-Je Cho ,  Marc Albrecht

IPC: G09G3/20

Abstract: This application relates to performing certain dithering processes to eliminate display artifacts such as flicker, which can be caused by charge accumulation at the display. The dither process can be performed by a display controller that uses a group lookup method for identifying groups of dithering patterns that can be combined to expand a number of color values available to the display. The dither process can also be performed as a temporal process that incorporates groups of dithering patterns into frames and shifts a spatial arrangement of the groups of dithering patterns over a sequence of frames. Additionally, the dither process can incorporate counters that count the number of times a particular spatial arrangement of dithering patterns has been used in a sequence of frames in order that each spatial arrangement of dithering patterns will share an average count with other spatial arrangements over a sequence of frames.

公开(公告)号：US20180349244A1

公开(公告)日：2018-12-06

申请号：US15900740

申请日：2018-02-20

Applicant: Apple Inc.

Inventor： Abhinav Pathak ,  Conor J. O'Reilly ,  Shashi K. Dua ,  Udaykumar R. Raval ,  Christopher W. Chaney ,  Amit K. Vyas ,  Albert S. Liu ,  Roberto Alvarez ,  Rohit Mundra ,  Vladislav Sahnovich ,  Patrick Y. Law ,  Paul M. Thompson ,  Paolo Sacchetto ,  Chaohao Wang ,  Arthur L. Spence ,  Jean-Pierre Simon Guillou ,  Mohammad Ali Jangda ,  Christopher Edward Glazowski ,  Yifan Zhang ,  Prajakta S. Karandikar ,  Han Ming Ong

IPC: G06F11/30 ,  H04L29/08 ,  G09G3/32 ,  G06F11/32 ,  G06F11/34

Abstract: Circuits, methods, and apparatus that may estimate the power being consumed by an OLED display screen of an electronic device, may provide further information about that power usage, may modify or change functions performed by the electronic device based on that power usage, and may inform an application's developer about the amount of power being used by the electronic device while the electronic device is running the application. One example may estimate the power being used by an OLED display screen of an electronic device by determining the content of images being displayed during a duration. The estimated power may then be presented to a user. The estimated power may be used in decisions to modify or change parameters of the screen or other device components.

公开(公告)号：US20180336823A1

公开(公告)日：2018-11-22

申请号：US16049462

申请日：2018-07-30

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Hyunwoo Nho ,  Chaohao Wang ,  Jie Won Ryu ,  Kingsuk Brahma ,  Shiping Shen ,  Shengkui Gao ,  Hyunsoo Kim ,  Sun-Il Chang ,  Junhua Tan ,  Injae Hwang ,  Myungjoon Choi

IPC: G09G3/3233 ,  G09G3/3258 ,  G09G3/34

CPC classification number: G09G3/3233 ,  G09G3/3258 ,  G09G3/3406 ,  G09G2320/0233 ,  G09G2320/0295 ,  G09G2320/041 ,  G09G2320/0626 ,  G09G2360/144

Abstract: A method for operating an electronic display includes displaying image frames and receiving operational parameters of the electronic display based on illuminating a sense pixel of at least one row of pixels of the electronic display when displaying the image frames. A first set of pixels below the at least one row of pixels renders a portion of a first image frame and a second set of pixels above the at least one row of pixels renders a portion of a second image frame. The method also includes adjusting image display of a third image frame on the electronic display based on the operational parameters.

公开(公告)号：US10043472B2

公开(公告)日：2018-08-07

申请号：US14976853

申请日：2015-12-21

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Paolo Sacchetto ,  Howard H. Tang

IPC: G09G3/36

CPC classification number: G09G3/3655 ,  G09G3/2011 ,  G09G3/3614 ,  G09G3/3648 ,  G09G2300/0426 ,  G09G2300/043 ,  G09G2300/0465 ,  G09G2310/0281 ,  G09G2310/08 ,  G09G2320/0209

Abstract: A display device may include a source line that provides a data line signal to a pixel of the display device, a gate line that provides a gate signal to a switches associated with the pixel, and a voltage gate line disposed parallel to the source line and coupled to the gate line at a cross point node. The display device may also include a driver circuit that receives a pixel value to provide to the pixel, determines a compensation amount for the pixel value based on an expected kickback voltage present on the pixel due to a coupling effect between the source line and the voltage gate line, generates a compensated data line signal based on the compensation value and the pixel value, and provides the compensated data line signal to the pixel via the source line.

公开(公告)号：US20180090075A1

公开(公告)日：2018-03-29

申请号：US15274035

申请日：2016-09-23

Applicant: APPLE INC.

Inventor： Ilie Garbacea ,  Chaohao Wang ,  Chengrui Le

IPC: G09G3/3291 ,  G09G3/36

CPC classification number: G09G3/3291 ,  G09G3/3225 ,  G09G3/3648 ,  G09G2300/0426 ,  G09G2310/08 ,  G09G2320/0252 ,  G09G2320/0285 ,  G09G2330/021 ,  G09G2340/16

Abstract: Systems and methods for improving displayed image quality of an electronic display including a display pixel that displays an image frame based at least in part on an analog electrical signal supplied to the display pixel are provided. In some embodiments, control circuitry instructs the electronic display to display the image frame based at least in part on an expected charge accumulation in the display pixel determined using a charge accumulation model that describes one or more electric fields expected to be present in the display pixel when displaying the image frame and that provides a display pixel state indicative of expected charge accumulation in the display pixel when the image frame is to be displayed based at least in part on the one or more electric fields.