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：US10474860B2

公开(公告)日：2019-11-12

申请号：US15720827

申请日：2017-09-29

Applicant: Apple Inc.

Inventor： Mohammad Yeke Yazdandoost ,  Yafei Bi ,  Kingsuk Brahma ,  Giovanni Gozzini ,  Mohammad Jangda

IPC: G06K9/00 ,  G06K17/00 ,  G06K19/077 ,  G06K9/20

Abstract: An electronic device may include a display and a biometric image sensor configured for biometric image sensing. The electronic device may also include a display driver coupled to the display. The display driver may include first and second memories and a processor configured to alternatingly read respective illumination pattern data from the first and second memories to drive the display during biometric image sensing.

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.

公开(公告)号：US20190096300A1

公开(公告)日：2019-03-28

申请号：US15717755

申请日：2017-09-27

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Jie Won Ryu ,  Kingsuk Brahma ,  Hyunwoo Nho ,  Baris Cagdaser ,  Junhua Tan ,  Sun-Il Chang ,  Luigi Panseri ,  Injae Hwang ,  Jesse A. Richmond ,  Toshiaki Sawada ,  Hyuck-Jae Lee

IPC: G09G3/00

Abstract: An electronic device includes a display having a number of pixels, source driving circuitry that drives data to the pixels, and data lines that communicatively couple the source driving circuitry with the pixels. The electronic device also includes quality monitoring and calibration circuitry that identifies degradation in the source driving circuitry, one or more of the data lines, or both. The electronic device may be controlled based at least in part upon identification of the degradation.

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：US09952265B2

公开(公告)日：2018-04-24

申请号：US14993711

申请日：2016-01-12

Applicant: Apple Inc.

Inventor： Kingsuk Brahma ,  David A. Stronks ,  Hopil Bae ,  Wei H. Yao

IPC: G01R27/20 ,  G09G3/20 ,  G09G3/36 ,  G09G3/00

CPC classification number: G01R27/205 ,  G09G3/006 ,  G09G3/2092 ,  G09G3/2096 ,  G09G3/3607 ,  G09G3/3696 ,  G09G2300/0426 ,  G09G2310/08 ,  G09G2320/0223

Abstract: A display may have a substrate layer to which a display driver integrated circuit and flexible printed circuit are bonded. The display driver integrated circuit may be provided with switches and control circuitry for controlling the operation of the switches during bond resistance measurements. Test equipment may apply currents to pads in the display driver integrated circuit through contacts in the flexible printed circuit while controlling the switching circuitry. Based on these measurements and the measurement of trace resistances in a dummy flexible printed circuit, the test equipment may determine bond resistances for bonds between the display driver integrated circuit and the display substrate and between the flexible printed circuit and the display substrate. Displays may have master and slave display driver integrated circuits that share coarse reference voltages produced by the master from raw power supply voltages.