公开(公告)号：US11756481B2

公开(公告)日：2023-09-12

申请号：US17469816

申请日：2021-09-08

Applicant: Apple Inc.

Inventor： Hyunsoo Kim ,  Kingsuk Brahma ,  Myungjoon Choi ,  Yue Jack Chu ,  Li-Xuan Chuo ,  Hassan Edrees ,  Chin-Wei Lin ,  Hyunwoo Nho ,  Shinya Ono ,  Alex H. Pai ,  Jie Won Ryu ,  Yao Shi ,  Chaohao Wang

IPC: G09G3/3233 ,  G09G3/3266

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2320/0247 ,  G09G2320/041 ,  G09G2320/0626 ,  G09G2360/12

Abstract: Systems, methods, and devices are provided for mitigating visual artifacts by dynamically tuning bias voltages applied to display pixels. An electronic display may include a display pixel and a bias voltage supply. The bias voltage supply may supply a first bias voltage to the display pixel for a first subframe of a frame of image data. The bias voltage supply may supply a different second bias voltage to the display pixel for a second subframe of the frame of image data. This may mitigate certain image artifacts, such as flicker or variable refresh rate luminance difference, that could arise due to display pixel hysteresis that varies across subframes of the image frame.

公开(公告)号：US20220076627A1

公开(公告)日：2022-03-10

申请号：US17469816

申请日：2021-09-08

Applicant: Apple Inc.

Inventor： Hyunsoo Kim ,  Kingsuk Brahma ,  Myungjoon Choi ,  Yue Jack Chu ,  Li-Xuan Chuo ,  Hassan Edrees ,  Chin-Wei Lin ,  Hyunwoo Nho ,  Shinya Ono ,  Alex H. Pai ,  Jie Won Ryu ,  Yao Shi ,  Chaohao Wang

IPC: G09G3/3233

Abstract: Systems, methods, and devices are provided for mitigating visual artifacts by dynamically tuning bias voltages applied to display pixels. An electronic display may include a display pixel and a bias voltage supply. The bias voltage supply may supply a first bias voltage to the display pixel for a first subframe of a frame of image data. The bias voltage supply may supply a different second bias voltage to the display pixel for a second subframe of the frame of image data. This may mitigate certain image artifacts, such as flicker or variable refresh rate luminance difference, that could arise due to display pixel hysteresis that varies across subframes of the image frame.

公开(公告)号：US10984713B1

公开(公告)日：2021-04-20

申请号：US16409489

申请日：2019-05-10

Applicant: Apple Inc.

Inventor： Junhua Tan ,  Chaohao Wang ,  Jun Li ,  Myungjoon Choi ,  Hyunsoo Kim ,  Shengkui Gao ,  Injae Hwang ,  Sun-Il Chang ,  Jie Won Ryu ,  Hyunwoo Nho ,  Shiping Shen

IPC: G09G3/3233

Abstract: An electronic display system may include a display panel used to display an image through emitting light. The electronic display system may also include processing circuitry that receives indication of an image to be displayed on the display panel and generates one or more signals to communicate the image on the display panel. The processing circuitry may compensate for non-uniformities in light emission between pixels of the display due to current-voltage non-uniformities.

公开(公告)号：US10573234B2

公开(公告)日：2020-02-25

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

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：US20250037648A1

公开(公告)日：2025-01-30

申请号：US18784592

申请日：2024-07-25

Applicant: Apple Inc.

Inventor： Jie Won Ryu ,  Myungjoon Choi ,  Kevin W. Sliech ,  Ju Hyung Nam ,  Hyunwoo Nho ,  Qiuyao Zhu

IPC: G09G3/32

Abstract: Electronic devices and displays are provided for reducing or eliminating image artifacts due to delayed or dropped image frames. Such an electronic display may include an electronic display panel to display an image frame and display driver circuitry (e.g., a timing controller (TCON)). The display driver circuitry may program display pixels of the display panel to display the image frame over a series of subframes having time quanta higher than a maximum frame rate of the electronic display.

公开(公告)号：US11205363B2

公开(公告)日：2021-12-21

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: G06F3/046 ,  H04B3/32 ,  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：US11127357B2

公开(公告)日：2021-09-21

申请号：US16850936

申请日：2020-04-16

Applicant: Apple Inc.

Inventor： Jie Won Ryu ,  Myungjoon Choi ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Chin-Wei Lin ,  Shiping Shen ,  Kingsuk Brahma ,  Chaohao Wang ,  Shinya Ono ,  Alex H. Pai ,  Hassan Edrees

IPC: G09G3/30 ,  G09G3/3291

Abstract: Techniques for implementing and/or operating an electronic device, which includes a display pixel that emits light to facilitate displaying an image during an emission period and a data driver coupled to the display pixel via a data line. The data driver generates a data line voltage signal based on image data that indicates target luminance of the display pixel in the image and supplies the data line voltage signal to the data line during a non-emission period preceding the emission period to facilitate writing the image to the display pixel. Additionally, the data driver supplies an intermediate voltage greater than a ground voltage to the data line during the emission period in which the image is displayed to facilitate reducing luminance variation in the image resulting from a leakage current flowing between an internal node of the display pixel and the data line during the emission period.

公开(公告)号：US20200335046A1

公开(公告)日：2020-10-22

申请号：US16850936

申请日：2020-04-16

Applicant: Apple Inc.

Inventor： Jie Won Ryu ,  Myungjoon Choi ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Chin-Wei Lin ,  Shiping Shen ,  Kingsuk Brahma ,  Chaohao Wang ,  Shinya Ono ,  Alex H. Pai ,  Hassan Edrees

IPC: G09G3/3291

Abstract: Techniques for implementing and/or operating an electronic device, which includes a display pixel that emits light to facilitate displaying an image during an emission period and a data driver coupled to the display pixel via a data line. The data driver generates a data line voltage signal based on image data that indicates target luminance of the display pixel in the image and supplies the data line voltage signal to the data line during a non-emission period preceding the emission period to facilitate writing the image to the display pixel. Additionally, the data driver supplies an intermediate voltage greater than a ground voltage to the data line during the emission period in which the image is displayed to facilitate reducing luminance variation in the image resulting from a leakage current flowing between an internal node of the display pixel and the data line during the emission period.

公开(公告)号：US10755618B2

公开(公告)日：2020-08-25

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-Il 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：US12136394B2

公开(公告)日：2024-11-05

申请号：US16802354

申请日：2020-02-26

Applicant: Apple Inc.

Inventor： Hyunwoo Nho ,  Myungjoon Choi ,  Hyunsoo Kim ,  Mohammad Ali Jangda ,  Jie Won Ryu ,  Shiping Shen ,  Kingsuk Brahma ,  Chaohao Wang ,  Wei H. Yao ,  Alex H. Pai

IPC: G09G3/3258 ,  G09G3/3233

Abstract: An electronic device includes a display having multiple regions of pixels. Each pixel includes a diode that emits light based on an amount of current through the diode and a transistor that controls the amount of current flowing through the diode. The electronic device includes driver-integrated circuitry that reduces hysteresis in a first transistor of a first pixel of a region of pixels, settles a threshold voltage of the first transistor, applies a test voltage to the first transistor, and senses a current across the first transistor. The electronic device includes processing circuitry that determines a predetermined voltage based on the current and a predetermined current-voltage relationship determined at an initial temperature, determines a voltage difference between the test voltage and the predetermined voltage, and applies the predetermined voltage and the voltage difference to a second transistor of a second pixel of the region of pixels.