公开(公告)号：US20230197020A1

公开(公告)日：2023-06-22

申请号：US17988721

申请日：2022-11-16

Applicant: Apple Inc.

Inventor： Shengkui Gao ,  Jie Won Ryu ,  Kingsuk Brahma ,  Marc J DeVincentis ,  Mohammad Ali Jangda ,  Paolo Sacchetto ,  Weijun Yao ,  Yafei Bi ,  Yang Xu ,  Yue Jack Chu ,  Zhe Hua

IPC: G09G3/34 ,  G09G3/36

CPC classification number: G09G3/3426 ,  G09G3/3611 ,  G09G2330/021 ,  G09G2360/16

Abstract: This disclosure provide various techniques for tracking emission profiles on an electronic display. An emission profile may be applied to the electronic display in order to illuminate certain pixels and deactivate (e.g., turn off) certain pixels in the electronic display to facilitate refreshing (e.g., programming with new image data) the deactivated pixels. A real-time row-based average pixel level or average pixel luminance calculation architecture may track the one or more EM profiles to accurately model EM profile behavior, which may enable accurate calculation of the average pixel level or average pixel luminance of the electronic display at any one point in time. The accurate average pixel level or average pixel luminance calculations effectuated by the EM profile tracking may be used to reduce the IR drop, improve real-time peak-luminance control, and improve the performance of under-display sensors, among other advantages.

公开(公告)号：US20220076629A1

公开(公告)日：2022-03-10

申请号：US17528183

申请日：2021-11-16

Applicant: Apple Inc.

Inventor： Maofeng Yang ,  Shengkui Gao ,  Paolo Sacchetto ,  Weijun Yao ,  Yongjun Li ,  Jiayi Jin

IPC: G09G3/3233 ,  G09G3/34 ,  G09G3/36

Abstract: A system may include an electronic display panel having pixels, where each pixel emits light based on a respective programming signal applied to the pixel. The system may also include processing circuitry to determine a respective control signal upon which the respective programing signal for each pixel is based. The processing circuitry may determine each respective control signal based at least in part on approximations of respective pixel brightness-to-data relationship as defined by a function having variables stored in memory accessible to the processing circuitry.

公开(公告)号：US10824279B2

公开(公告)日：2020-11-03

申请号：US14869409

申请日：2015-09-29

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Yingxuan Li ,  Hung Sheng Lin ,  Paolo Sacchetto ,  Szu-Hsien Lee ,  Weijun Yao ,  Howard Tang

IPC: G06F3/044 ,  G06F1/16 ,  G06F3/041 ,  G09G3/36 ,  G09G3/32 ,  G06F3/047

Abstract: A system is disclosed. The system can comprise drive circuitry included in a first component of the system, the drive circuitry configured to drive a first touch electrode on a touch sensor panel. The system can also comprise a driving line configured to couple an output of the drive circuitry to the first touch electrode. The system can also comprise a feedback line configured to couple the output of the drive circuitry to an input of the drive circuitry, wherein a first end of the feedback line is coupled to the input of the drive circuitry at the first component, and a second end of the feedback line is configured to be coupled to the output of the drive circuitry at a second component, different from the first component, of the system.

公开(公告)号：US20200243012A1

公开(公告)日：2020-07-30

申请号：US16283481

申请日：2019-02-22

Applicant: Apple Inc.

Inventor： Jiayi Jin ,  David A. Doyle ,  Kyung Hoae Koo ,  Maofeng Yang ,  Michael H. Lim ,  Paolo Sacchetto ,  Timothy M. Johnson ,  Venkatesh Rajendran ,  Weijun Yao ,  Yue Jack Chu

IPC: G09G3/3258 ,  G09G3/3266

Abstract: A display may have an array of organic light-emitting diode display pixels. Each display pixel may include a drive transistor coupled in series with one or more emission transistors and a respective organic light-emitting diode (OLED). A semiconducting-oxide transistor may be coupled between a drain terminal and a gate terminal of the drive transistor to help reduce leakage during low-refresh-rate display operations. To compensate for variations in the threshold voltage of the semiconducting-oxide transistor, the magnitude of a high voltage level of a scan control signal provided to the gate terminal of the semiconducting-oxide transistor may be adjusted. Sensing circuitry may be used to sense a display current while displaying a calibration image. The sensed display current may be compared to an expected display current associated with the calibration image. Processing circuitry may update the high voltage level based on the actual display current compared to the expected display current.

公开(公告)号：US10573236B1

公开(公告)日：2020-02-25

申请号：US16283473

申请日：2019-02-22

Applicant: Apple Inc.

Inventor： Shengkui Gao ,  Graeme M. Williams ,  Haifeng Li ,  Mohammad Ali Jangda ,  Paolo Sacchetto ,  Pierre-Yves Emelie ,  Shyuan Yang ,  Sinan Alousi ,  Tsung-Ting Tsai ,  Warren S. Rieutort-Louis ,  Weijun Yao ,  Yafei Bi ,  Yue Jack Chu

IPC: G09G3/3233 ,  G09G3/20 ,  G09G3/3266

Abstract: A display may have an array of pixels. Due to the presence of a notch in the display, the display may have some rows that are shorter than other rows in the display, and accordingly different gate line loading. To account for the gate line loading variations, the display driver circuitry may have gate driver circuits that provide different gate line signals to different rows of pixels within the display. In other arrangement, luminance adjustment circuitry may receive image data and generate corresponding compensated image data to account for gate line loading variations between rows of pixels in the display. The image data may be compensated based on the location of the pixel, the gray level of the image data, the display brightness, and/or temperature.

公开(公告)号：US20180090074A1

公开(公告)日：2018-03-29

申请号：US15701030

申请日：2017-09-11

Applicant: Apple Inc.

Inventor： Jiayi Jin ,  Paolo Sacchetto ,  Maofeng Yang ,  Weijun Yao

IPC: G09G3/3258 ,  G09G3/20

Abstract: Electronic devices, storage medium containing instructions, and methods pertain to determining a target boosted threshold voltage level based at least in part on a target emission threshold voltage level. Using the determined target boosted threshold voltage level, a light emitting diode (LED)-controlling transistor is submitted to voltage stress to boost a threshold voltage of the transistor to the target boosted threshold voltage level during a first portion of a refresh period between first and second emission periods. During a second portion of the refresh period, the voltage stress is de-asserted to settle the threshold voltage to a target emission threshold voltage level for the second emission period. After the voltage is settled, the LED-controlling transistor is driven based at least in part on the target emission threshold voltage level.

公开(公告)号：US20180005562A1

公开(公告)日：2018-01-04

申请号：US15199315

申请日：2016-06-30

Applicant: APPLE INC.

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

IPC: G09G3/20 ,  G09G3/3208

CPC classification number: G09G3/2007 ,  G09G3/3208 ,  G09G3/3233 ,  G09G2310/027 ,  G09G2310/06 ,  G09G2310/066 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/029 ,  G09G2320/0693

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：US20160094219A1

公开(公告)日：2016-03-31

申请号：US14502899

申请日：2014-09-30

Applicant: APPLE INC.

Inventor： Ahmad Al-Dahle ,  Hyunwoo Nho ,  Marduke Yousefpor ,  Weijun Yao ,  Yingxuan Li

IPC: H03K17/687 ,  G09G3/36

CPC classification number: H03K17/6872 ,  G09G3/20 ,  G09G3/3696 ,  G09G2300/08 ,  H03K17/145 ,  H03K17/687 ,  H03K2217/0054

Abstract: Systems, methods, and devices to control a transistor to maintain one or more substantially constant characteristics while activated or deactivated are provided. One such system includes a transistor that receives an activation signal on a gate terminal to become activated during a first period and receives a deactivation signal on the gate terminal to become deactivated during a second period. The transistor receives an input signal on an input terminal during the first period and the second period. The input signal varies during the first period and during the second period. The transistor may have improved reliability (e.g., substantially constant on resistance RON) because a first difference between the input signal and the activation signal substantially does not vary during the first period and a second difference between the input signal and the deactivation signal substantially does not vary during the second period.

Abstract translation: 提供了控制晶体管以在激活或去激活时维持一个或多个基本恒定特性的系统，方法和装置。 一个这样的系统包括晶体管，其在栅极端子处接收激活信号，以在第一时段期间被激活，并且在第二周期期间接收在栅极端子上的去激活信号以使其失效。 晶体管在第一周期和第二周期期间在输入端子上接收输入信号。 输入信号在第一周期和第二周期期间变化。 晶体管可能具有改进的可靠性（例如，基本上恒定的导通电阻RON），因为输入信号和激活信号之间的第一差异在第一周期内基本上不变，而输入信号和去激活信号之间的第二差基本上不是 在第二期间有所不同。

公开(公告)号：US20160092015A1

公开(公告)日：2016-03-31

申请号：US14639406

申请日：2015-03-05

Applicant: APPLE INC.

Inventor： Ahmad Al-Dahle ,  Yingxuan Li ,  Marduke Yousefpor ,  Weijun Yao

IPC: G06F3/041 ,  G09G3/36 ,  G06F3/044

CPC classification number: G09G3/3648 ,  G06F3/0412 ,  G06F3/044 ,  G06F2203/04105 ,  G06F2203/04106 ,  G06F2203/04107 ,  G09G2354/00

Abstract: Systems and method of performing touch and force sensing in an electronic device. The device includes a cover and an array of touch-sensor electrodes disposed below the cover. The first array of electrodes may be configured to sense a touch on the cover using a capacitive sensing scheme. The device also includes a force-sensor drive electrode disposed below the first array of electrodes and a force-sensor sense electrode disposed below the force-sensor drive electrode. The force-sensor drive and sense electrode may be configured to sense a force on the cover. The device also includes a shared drive circuit having an output that is operatively coupled to the array of touch-sensor electrodes and the force-sensor drive electrode.

Abstract translation: 在电子设备中执行触摸和力感测的系统和方法。 该装置包括盖子和设置在盖子下方的触摸传感器电极阵列。 第一电极阵列可以被配置为使用电容感测方案感测盖上的触摸。 该装置还包括设置在第一电极阵列下方的力传感器驱动电极和设置在力传感器驱动电极下方的力传感器感测电极。 力传感器驱动和感测电极可以被配置为感测盖上的力。 该装置还包括具有可操作地耦合到触摸传感器电极阵列和力传感器驱动电极的输出的共享驱动电路。

公开(公告)号：US20150332638A1

公开(公告)日：2015-11-19

申请号：US14276146

申请日：2014-05-13

Applicant: APPLE INC.

Inventor： Yingxuan Li ,  Weijun Yao ,  Wei H. Yao ,  Kingsuk Brahma ,  Hyunwoo Nho

IPC: G09G3/36

CPC classification number: G09G3/3688 ,  G09G3/3648 ,  G09G3/3655 ,  G09G3/3696 ,  G09G2300/0426 ,  G09G2310/027 ,  G09G2310/0291 ,  G09G2320/0233 ,  G09G2320/0276 ,  G09G2320/029

Abstract: Devices and methods for reducing or eliminating image artifacts are provided. By way of example, a display panel includes a pixels including pixel electrodes configured to receive an image data signal, and common electrodes (VCOMs) configured to receive a common voltage signal. The display panel includes a source driver, which includes a first digital to analog converter (DAC) configured to generate a gamma voltage signal to provide a first adjustment to the image data signal, and a second DAC configured to generate an error correction voltage signal to provide a second adjustment to the image data signal. The second adjustment is configured to adjust the image data signal to compensate for an operational characteristic difference between row pixels and column pixels of the display panel. The source driver includes an output buffer to supply the image data signal to the pixel electrodes.

Abstract translation: 提供了用于减少或消除图像伪像的设备和方法。 作为示例，显示面板包括被配置为接收图像数据信号的像素电极的像素和被配置为接收公共电压信号的公共电极（VCOM）。 显示面板包括源驱动器，其包括被配置为产生伽马电压信号以对图像数据信号提供第一调整的第一数模转换器（DAC）和被配置为产生纠错电压信号的第二DAC 对图像数据信号提供第二调整。 第二调整被配置为调整图像数据信号以补偿显示面板的行像素和列像素之间的操作特性差异。 源极驱动器包括用于将图像数据信号提供给像素电极的输出缓冲器。