公开(公告)号：US11189202B1

公开(公告)日：2021-11-30

申请号：US16567989

申请日：2019-09-11

Applicant: Apple Inc.

Inventor： Sun-Il Chang ,  Baris Cagdaser ,  Chaohao Wang ,  Derek Keith Shaeffer ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Injae Hwang ,  Jesse Aaron Richmond ,  Jie Won Ryu ,  Junhua Tan ,  Kingsuk Brahma ,  Myung-Je Cho ,  Myungjoon Choi ,  Shengkui Gao ,  Shiping Shen ,  Wei H. Yao ,  Yunhui Hou

IPC: G09G3/00 ,  G09G3/3258 ,  G09G3/3233

Abstract: A system may include an electronic display panel having multiple pixels for depicting image data and processing circuitry that may receive a first error value representative of a first difference between a first electrical signal measured at a first pixel of the multiple pixels and an expected electrical signal for the first pixel. The first electrical signal may be based on a test signal transmitted to the first pixel and the expected electrical signal may correspond to an expected response of the first pixel based on the test signal. The processing circuitry may filter the first error value to generate a first compensated error value and may filter the first error value based on the first compensated error value to generate a second compensated error value, where the second compensated error value may filter one or more effects of spatial crosstalk between one or more pixels near the first pixel.

公开(公告)号：US11158256B2

公开(公告)日：2021-10-26

申请号：US16762846

申请日：2018-09-28

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Fan Gui ,  Hung Sheng Lin ,  Hyunwoo Nho ,  Jie Won Ryu ,  Junhua Tan ,  Kingsuk Brahma ,  Majid Gharghi ,  Mohammad Reza Esmaeili Rad ,  Shinya Ono ,  Yun Wang ,  Zino Lee

IPC: G09G3/3233 ,  G09G3/3275

Abstract: A display may include an array of organic light-emitting diode display pixels having transistors characterized by threshold voltages subject to transistor variations. Compensation circuitry may be used to sense a current from selected display pixels. A display pixel may include a drive transistor, a gate setting transistor for driving a reference voltage onto the gate terminal of the drive transistor, a data loading and current sensing transistor for connecting the drive transistor to a data/current-sensing line, a light-emitting diode, an emission control transistor coupled between the drive transistor and the diode, and an anode resetting transistor for selectively resetting the anode terminal of the diode. During in-frame current sensing operations, the emission control transistor may be turned off to decouple the drive transistor from the diode, thereby blocking off any residue current and lateral leakage current that may be present at the diode.

公开(公告)号：US20210118349A1

公开(公告)日：2021-04-22

申请号：US17016282

申请日：2020-09-09

Applicant: Apple Inc.

Inventor： Myungjoon Choi ,  Kingsuk Brahma ,  Li-Xuan Chuo ,  Mohammad Ali Jangda ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Alex H. Pai ,  Jesse Aaron Richmond ,  Jie Won Ryu ,  Shiping Shen ,  Chaohao Wang

IPC: G09G3/20 ,  G06F3/044

Abstract: An electronic display may include pixel circuitry to display an image based on image data compensated for voltage variations within the pixel circuitry. Image processing circuitry may generate a compensation value to compensate the image data for cross-talk (e.g., electromagnetic coupling between an electrode of touch sensor circuitry and an electrode of the pixel circuitry) that may cause the voltage variations. Additionally or alternatively, the image processing circuitry may generate another compensation value to compensate the image data for another cross-talk (e.g., electromagnetic coupling between two electrodes of the pixel circuitry). The image processing circuitry may generate the compensated image data based on the first compensation value and/or the second compensation value.

公开(公告)号：US10943541B1

公开(公告)日：2021-03-09

申请号：US16556037

申请日：2019-08-29

Applicant: Apple Inc.

Inventor： Junhua Tan ,  Hsin-Ying Chiu ,  Sun-Il Chang ,  Yunhui Hou ,  Jie Won Ryu ,  Hyunwoo Nho ,  Weichuan Yao ,  Shiping Shen ,  Injae Hwang ,  Hyunsoo Kim ,  Myungjoon Choi ,  Shengkui Gao ,  Chaohao Wang ,  Kingsuk Brahma ,  Jesse Aaron Richmond ,  Myung-Je Cho ,  Changki Min ,  Wei H. Yao

IPC: G09G5/00 ,  G09G3/3258 ,  G09G3/32 ,  G09G3/3233

Abstract: Current-voltage shift determination circuitry of a processing core complex coupled to the electronic display determines total current-voltage shift values at a pixel. The current-voltage shift determination circuitry then determines temperature-based current-voltage shift values at the pixel. The current-voltage shift determination circuitry extracts the temperature-based current-voltage shift values from the total current-voltage shift values to determine age-based voltage degradation values. Display compensation circuitry of the processing core complex adjusts display of image data by the pixel based on the age-based voltage degradation values. In this manner, voltage degradation due to pixel aging may be determined separately from current-voltage shift due to temperature, and, as such, be more accurately compensated for, resulting in better display of image data. Compensation may thus be performed based on the age of the pixels and a sensed temperature at the pixels, instead of by constantly sensing current across the diodes of the pixels.

公开(公告)号：US20210056930A1

公开(公告)日：2021-02-25

申请号：US16928882

申请日：2020-07-14

Applicant: Apple Inc.

Inventor： Jaeyoung Kang ,  Jesse Aaron Richmond ,  Mahdi Farrokh Baroughi ,  Hopil Bae ,  John T. Wetherell ,  Kingsuk Brahma ,  Yuichi Okuda ,  Shingo Hatanaka ,  Baris Cagdaser ,  Myungjoon Choi ,  Jie Won Ryu ,  Hyunwoo Nho ,  Yafei Bi ,  Wei H. Yao ,  Henry C. Jen ,  Derek Keith Shaeffer

IPC: G09G5/10 ,  G09G3/20

Abstract: An electronic device may include an electronic display having multiple display pixels. The display pixels may illuminate at a target luminance based at least in part on a first analog voltage signal. The electronic device may also include an electrical bus configured to generate multiple analog voltage signals including the first analog voltage signal, which is output on an output of the electrical bus. The electrical bus may include a digital to analog converter to generate at least some of the analog voltage signals and multiple output buffers to buffer the analog voltage signals. The outputs may be buffered by an output buffer of the output buffers.

公开(公告)号：US10573211B2

公开(公告)日：2020-02-25

申请号：US16361018

申请日：2019-03-21

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Shengkui Gao ,  Hyunwoo Nho ,  Chin-Wei Lin ,  Mohammad B. Vahid Far ,  Jie Won Ryu ,  Kingsuk Brahma ,  Junhua Tan ,  Sun-Il Chang ,  Shinya Ono ,  Jesse A. Richmond ,  Yafei Bi ,  Derek K. Shaeffer

IPC: G09G3/00

Abstract: Systems and methods are provided for differential sensing (DS), difference-differential sensing (DDS), correlated double sampling (CDS), and/or programmable capacitor matching to reduce display panel sensing noise. An electronic device may include one or more processors and an electronic display. The one or more processors may generate image data and adjust the image data based at least in part on display sensing feedback. The electronic display may employ sensing circuitry that obtains the display sensing feedback at least in part by applying test data to a pixel of a column of an active area of the display and differentially senses an electrical value of the pixel in comparison to a reference signal from a different column. This reference signal may provide a common mode noise reference, which is removed by the differential sensing and thereby enhances a quality of the sensed electrical value of the pixel.

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：US10453432B2

公开(公告)日：2019-10-22

申请号：US15699460

申请日：2017-09-08

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Sun-Il Chang ,  Hyunwoo Nho ,  Jie Won Ryu ,  Junhua Tan

IPC: G09G5/393 ,  G09G5/391 ,  G09G3/20 ,  G09G5/373

Abstract: An electronic device includes an electronic display, whereby the electronic display includes an active area that includes a pixel having a display behavior that varies with temperature. The electronic display also includes processing circuitry. The processing circuitry may, when in operation, generate image data to send to the pixel and adjust the image data to generate corrected image data based at least in part on a stored correction value for the pixel, wherein the stored correction value corresponds to an effect of temperature on the pixel.

公开(公告)号：US20190244555A1

公开(公告)日：2019-08-08

申请号：US16389899

申请日：2019-04-19

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Shengkui Gao ,  Hyunwoo Nho ,  Chin-Wei Lin ,  Mohammad B. Vahid Far ,  Jie Won Ryu ,  Kingsuk Brahma ,  Junhua Tan ,  Sun-II Chang ,  Shinya Ono ,  Jesse Aaron Richmond ,  Yafei Bi ,  Derek K. Shaeffer ,  Myungjoon Choi ,  Shiping Shen

IPC: G09G3/00

Abstract: Systems and methods are provided for differential sensing (DS), difference-differential sensing (DDS), correlated double sampling (CDS), correlated-correlated double sampling (CDS-CDS) and/or programmable capacitor matching to reduce display panel sensing noise. An electronic device may include one or more processors that generate image data according to sensing operations. The one or more processors may reference a sensing pattern as part of sensing operations. Applying test sensing signals based on the sensing pattern may help reduce error associated with sensing operations.

公开(公告)号：US10269278B2

公开(公告)日：2019-04-23

申请号：US15694373

申请日：2017-09-01

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Hyunwoo Nho ,  Shengkui Gao ,  Jesse A. Richmond ,  Jie Won Ryu ,  Junhua Tan ,  Kingsuk Brahma ,  Mohammad B. Vahid Far ,  Sun-Il Chang ,  Yafei Bi

IPC: G09G3/00 ,  G09G3/20 ,  G06F3/041 ,  G09G3/3225

Abstract: Electronic displays, systems, and methods that perform display panel sensing are provided. An electronic device may include processing circuitry that generates image data based at least in part on display panel sensing feedback and an electronic display. The electronic display may display the image data on pixels coupled to one of several sense lines. There may be an odd number of sense lines with common electrical characteristics. The electronic display may obtain display panel sense feedback at least in part by differentially sensing each one of the sense lines with sense lines with common electrical characteristics with another one of the sense lines the common electrical characteristics.