公开(公告)号：US11158253B1

公开(公告)日：2021-10-26

申请号：US16563500

申请日：2019-09-06

Applicant: Apple Inc.

Inventor： Injae Hwang ,  Hung Sheng Lin ,  Hyunwoo Nho ,  Sun-Il Chang ,  Rui Zhang ,  Mohammad B. Vahid Far ,  Kingsuk Brahma ,  Jesse A. Richmond ,  Hyunsoo Kim ,  Junhua Tan

IPC: G09G3/3233 ,  G09G3/3275

Abstract: A display device may include a plurality of pixels configured to display image data on a display. The display device may also include a circuit that measures a first current associated with a light-emitting diode (LED) of a pixel of the plurality of pixels in response to the circuit receiving a first data voltage. The circuit may also measure a second current associated with the LED of the pixel of the plurality of pixels in response to the circuit receiving a second data voltage. The circuit may then determine a voltage associated with the LED based at least in part on the first current and the second current.

公开(公告)号：US20210150950A1

公开(公告)日：2021-05-20

申请号：US16644932

申请日：2018-08-31

Applicant: Junhua TAN ,  Chin-Wei LIN ,  Hung Sheng LIN ,  Hyunsoo KIM ,  Hyunwoo NHO ,  Injae HWANG ,  Jesse A. RICHMOND ,  Jie Won RYU ,  Kavinaath MURUGAN ,  Kingsuk BRAHMA ,  Shengkui GAO ,  Shiping SHEN ,  Sun-Il CHANG ,  Myung-Je CHO ,  Yafei BI ,  Myungjoon CHOI ,  Chaohao WANG ,  Weichuan YAO ,  Apple Inc.

Inventor： Chin-Wei Lin ,  Hung Sheng Lin ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Injae Hwang ,  Jesse A. Richmond ,  Jie Won Ryu ,  Junhua Tan ,  Kavinaath Murugan ,  Kingsuk Brahma ,  Shengkui Gao ,  Shiping Shen ,  Sun-Il Chang ,  Myung-Je Cho ,  Yafei Bi

IPC: G09G3/00

Abstract: Electronic devices and methods for compensating for aging or other effects in a display during a non-transmitting state (off state) of the display. Sensing may include emissive element sensing of the display and/or thin film transistor sensing of the display. Compensating for the effects may preserve or increase a uniformity of transmission of the display.

公开(公告)号：US20200302856A1

公开(公告)日：2020-09-24

申请号：US16746325

申请日：2020-01-17

Applicant: Apple Inc.

Inventor： Xin Lin ,  Yun Wang ,  Chin-Wei Lin ,  Majid Gharghi ,  Fan Gui ,  Chen-Ming Chen ,  Jie Won Ryu ,  Hyunwoo Nho ,  Alex H. Pai ,  Kingsuk Brahma ,  Junhua Tan ,  Szu Heng Tseng

IPC: G09G3/32 ,  G09G3/20

Abstract: A system includes an electronic display panel that has a plurality of pixels configured to depict frames of image data. The electronic display also includes display driver circuitry configured to, for a first frame of image data representing first image content, modify a gate-to-source voltage of a transistor of a first pixel of the plurality of pixels to a content-dependent first gate-to-source voltage. Additionally, after modifying the gate-to-source voltage to the first gate-to-source voltage, the display driver circuitry is configured to program the first pixel by modifying the gate-to-source voltage to a gate-to-source programming voltage that differs from the first gate-to-source voltage and is based on image data associated with the pixel from the first frame of the image data. Furthermore, the display driver circuitry is configured to cause the plurality of pixels to emit light.

公开(公告)号：US10777106B2

公开(公告)日：2020-09-15

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 ,  G09G3/3275 ,  G09G3/36 ,  G09G3/3225

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：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：US10535287B2

公开(公告)日：2020-01-14

申请号：US15275374

申请日：2016-09-24

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Lu Zhang ,  Zhibing Ge ,  Shih-Chyuan Fan Jiang ,  Ilie Garbacea ,  Marc Albrecht ,  Kingsuk Brahma ,  Hopil Bae ,  Paolo Sacchetto ,  Jie Won Ryu ,  Sandro H. Pintz ,  Chengrui Le

IPC: G09G3/34 ,  G09G3/3258 ,  G09G3/36 ,  G09G3/20

Abstract: Systems and methods are provided for improving displayed image quality of an electronic display that includes a display pixel. The electronic display displays a first image frame directly after a second image frame by applying an analog electrical signal to the display pixel. To facilitate display of the first image frame, circuitry receives image data corresponding to the image frame, in which the image data includes a grayscale value that indicates target luminance of the display pixel; determines expected refresh rate of the first image frame based at least in part on actual refresh rate of the second image frame; determines a pixel response correction offset based at least in part on the expected refresh rate of the first image frame; and determines processed image data by applying the pixel response correction offset to the grayscale value, in which the processed image data indicates magnitude of the analog electrical signal.

公开(公告)号：US10424244B2

公开(公告)日：2019-09-24

申请号：US15404139

申请日：2017-01-11

Applicant: Apple Inc.

Inventor： Chengrui Le ,  Chaohao Wang ,  Kingsuk Brahma ,  Jie Won Ryu ,  Chin-Wei Lin ,  Rui Zhang

IPC: G09G3/3233

Abstract: Aspects of the subject technology relate to electronic devices with displays. A display may include an array of display pixels each having a drive transistor and an organic light-emitting diode. A pulse-width-modulated current may be provided to the organic light-emitting diode during each display frame to compensate for an on-bias compensation applied to the drive transistor between display frames. The pulse-width-modulated current may be provided with a pulse-width-modulation ratio that decreases over the course of each display frame. The decrease of the pulse-width-modulation ratio for each display frame may be determined based on a peak luminance for that display frame. The reduction in flicker provided by the pulse-width-modulated current may facilitate operation of the display with a reduced refresh rate, thereby reducing power consumption by the display.

公开(公告)号：US10388201B2

公开(公告)日：2019-08-20

申请号：US15697132

申请日：2017-09-06

Applicant: Apple Inc.

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

IPC: G09G3/00 ,  G09G3/20 ,  G09G5/00

Abstract: Electronic devices and methods pertain to reducing artifacts resulting from a thermal profile preexisting a boot up of an electronic device are disclosed. Scanning driving circuitry of the electronic device scans at least a portion of one or more pixels of an active area of a display using a boot up scan before a boot up sequence of at least a portion of an electronic device completes. The results of the boot up scan are stored in local buffers and transferred to one or more processors upon connection to the one or more processors. The results of the boot up scan cause the one or more processors to modify image data to reduce or eliminate artifacts that may result during boot up due to thermal profiles or other parameters that may cause artifacts.

公开(公告)号：US20190221146A1

公开(公告)日：2019-07-18

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-II 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：US10175830B2

公开(公告)日：2019-01-08

申请号：US14870815

申请日：2015-09-30

Applicant: Apple Inc.

Inventor： Taif A. Syed ,  Kingsuk Brahma ,  Christoph H. Krah

IPC: G06F3/041 ,  G06F3/044

Abstract: A method for pre-charging a display panel may include simultaneously charging the display panel that displays image data and receives one or more touch inputs via a first voltage source and a capacitor that provides a first voltage to the display panel via a second voltage source. The first voltage is associated with receiving the one or more touch inputs, and the display panel and the capacitor are simultaneously charged for a first amount of time. The method may then include charging the display panel via the capacitor after the first amount of time for a second amount of time and charging the display panel via the second voltage source after the second amount of time for a third amount of time.