公开(公告)号：US10672320B2

公开(公告)日：2020-06-02

申请号：US16132116

申请日：2018-09-14

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Soojin Park ,  Bhadrinarayana L. Visweswaran ,  Chieh-Wei Chen ,  Anshi Liang ,  Marc Albrecht ,  Pierre-Yves Emelie ,  Sean C. Chang ,  Hyunwoo Nho ,  Mohammad Hajirostam ,  Myung-Je Cho ,  Shengkui Gao ,  Wei H. Yao ,  Yafei Bi

IPC: G09G3/20 ,  G09G3/3208

Abstract: A display device may include a processor that may receive image data, such that the image data may include gray level data and display brightness value (DBV) data for a first pixel of a display. The processor may then determine a gain compensation factor associated with the first pixel based on a correction spatial map, a brightness adaptation lookup table (LUT), the gray level data, and the DBV data. The processor may then determine an offset compensation factor associated with the first pixel based on the correction spatial map, the brightness adaptation lookup table (LUT), the gray level data, and the DBV data. The processor may generate compensated gray level data by applying the gain compensation factor and the offset compensation factor to the gray level data and transmit the compensated gray level data to pixel driving circuitry associated with the first pixel.

公开(公告)号：US20200152117A1

公开(公告)日：2020-05-14

申请号：US16678203

申请日：2019-11-08

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Hung Sheng Lin ,  Vasudha Gupta ,  Shinya Ono ,  Tsung-Ting Tsai ,  Shyuan Yang

IPC: G09G3/32 ,  G09G3/3291 ,  G09G3/3233

Abstract: An electronic device comprises a display and a controller. The controller is configured to provide a first frequency refresh rate to the display. The controller is also configured to generate a control signal configured to control emission of a light emitting diode of a display pixel of the display at a second frequency based on whether the first frequency refresh rate of the display is less than a predetermined threshold value.

公开(公告)号：US20200075683A1

公开(公告)日：2020-03-05

申请号：US16437979

申请日：2019-06-11

Applicant: Apple Inc.

Inventor： Aleksandr N. Polyakov ,  Meng-Huan Ho ,  Yi Huang ,  Yi Qiao ,  David S. Hum ,  Jean-Pierre S. Guillou ,  Yanming Li ,  Jun Qi ,  KiBeom Kim ,  Kwang Ohk Cheon ,  Cheng Chen ,  Rui Liu ,  ByoungSuk Kim ,  Ying-Chih Wang ,  Hung Sheng Lin ,  Donghee Nam ,  Tyler R. Kakuda ,  Takahide Ishii ,  Yurii Morozov

IPC: H01L27/32 ,  H01L51/52 ,  G06F3/041 ,  G06F3/044

Abstract: Display structures for controlling viewing angle color shift are described. In various embodiments, polarization sensitive diffusers, independent controlled cathode thicknesses, filtermasks, touch detection layers, and color filters are described.

公开(公告)号：US20200074926A1

公开(公告)日：2020-03-05

申请号：US16678148

申请日：2019-11-08

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Hung Sheng Lin ,  Shih Chang Chang ,  Shinya Ono

IPC: G09G3/3233 ,  H01L29/786 ,  H01L27/12 ,  G09G3/3275 ,  G09G3/3266

Abstract: A display may have an array of pixels each of which has a light-emitting diode such as an organic light-emitting diode. A drive transistor and an emission transistor may be coupled in series with the light-emitting diode of each pixel between a positive power supply and a ground power supply. The pixels may include first and second switching transistors. A data storage capacitor may be coupled between a gate and source of the drive transistor in each pixel. Signal lines may be provided in columns of pixels to route signals such as data signals, sensed drive currents from the drive transistors, and predetermined voltages between display driver circuitry and the pixels. The switching transistors, emission transistors, and drive transistors may include semiconducting-oxide transistors and silicon transistors and may be n-channel transistors or p-channel transistors.

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：US10529053B2

公开(公告)日：2020-01-07

申请号：US15711831

申请日：2017-09-21

Applicant: Apple Inc.

Inventor： Shengkui Gao ,  Hung Sheng Lin ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Katherine W. Song ,  Mohammad Hajirostam ,  Myung-Je Cho ,  Rui Zhang ,  Sang Y. Youn ,  Wei H. Yao ,  Yafei Bi

IPC: G06T3/40 ,  G06T7/90 ,  G06T7/00 ,  G06T5/00

Abstract: A display device may include a display having a pixels and a processor. The processor may receive image data, determine a digital offset value for a pixel based on a location of the pixel, such that the digital offset value compensates for one or more non-uniformity properties of the pixel. The processor may determine a scale factor associated with the pixel based on at least two of a luminance setting for the display, a driving mode of the display, and a gray level value for the pixel. The processor may then generate correction image data by applying the scale factor to the digital offset value, generate compensated image data based on the correction image data and the image data, and provide the compensated image data to the display.

公开(公告)号：US10460642B2

公开(公告)日：2019-10-29

申请号：US15199315

申请日：2016-06-30

Applicant: APPLE INC.

Inventor： Hung Sheng Lin ,  Jiayi Jin ,  Wei H. Yao ,  Hyunwoo Nho ,  Guangmao Xing ,  Weijun Yao ,  Xiaofeng Wang ,  Yafei Bi ,  Haifeng Li

IPC: G09G3/20 ,  G09G3/3208 ,  G09G3/3233

Abstract: Systems, methods, and devices are provided to reduce noise present in sensing circuits used for calibrating light emitting diodes (e.g., organic light emitting diodes) in electronic display devices. Such a system may include a display that renders image data using self-emissive pixels. Values on the pixels may be sensed using a current source that outputs a current and a comparator that receives the current. The comparator changes states when a voltage signal output by the capacitor crosses a first threshold voltage or a second threshold voltage. A controller receives a first time when the comparator component changes states based on the voltage signal, receives a second time when the comparator component changes states based on the voltage signal, determines a current value based on the first time and the second time, and calibrates a pixel based on the current value.

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：US20180337687A1

公开(公告)日：2018-11-22

申请号：US15600356

申请日：2017-05-19

Applicant: Apple Inc.

Inventor： Adam Adjiwibawa ,  David W. Lum ,  Wonjae Choi ,  Hynwoo Nho ,  Hopil Bae ,  Injae Hwang ,  Bryce T. Bradford ,  Jie Won Ryu ,  Hung Sheng Lin

IPC: H03M1/66 ,  H03M1/80 ,  G09G3/20

Abstract: A display device may include rows of pixels that displays image data on a display, data lines coupled to the rows of pixels, and a digital-to-analog converter (DAC) that outputs a ramp voltage signal including a data voltage to be depicted on a first pixel of the rows of pixels. The display device may also include a capacitor that receives the ramp voltage signal via the DAC and a circuit that sends a control signal to a circuit component that causes the DAC to couple to the capacitor via one of the data lines for a duration of time that comprises a first time when the ramp voltage signal is below the data voltage and a second time when the ramp voltage signal is approximately equal to the data voltage. The capacitor is coupled to the DAC when the ramp voltage signal is greater than zero.