公开(公告)号：US10359885B2

公开(公告)日：2019-07-23

申请号：US15650770

申请日：2017-07-14

申请人： Apple Inc.

发明人： Kingsuk Brahma ,  Jie Won Ryu ,  Hopil Bae ,  Yafei Bi

IPC分类号： G06F3/041 ,  G09G3/20 ,  G06F3/044 ,  G02F1/1333

摘要： Touch induced flicker for variable refresh rate (VRR) displays can be reduced by adjusting one or more voltages. Synchronization of touch sensing operations after an immediate exit can introduce flicker issues into the VRR display. In some examples, the touched induced flicker can be reduced or eliminated by tuning the voltage on a common electrode (Vcom) to a tuning point that reduces a maximum error below a threshold, irrespective of refresh rate. In some examples, touch induced flicker can be reduced or eliminated by monitoring average Vcom, and when the change in average Vcom exceeds a threshold, Vcom can be adjusted to counteract the change in average Vcom due to the variable refresh rate and/or immediate exit. In some examples, touch induced flicker can be reduced or eliminated by applying a direct current (DC) pedestal to pixel gate lines during touch sensing scans.

公开(公告)号：US10096284B2

公开(公告)日：2018-10-09

申请号：US15270952

申请日：2016-09-20

申请人： Apple Inc.

发明人： Mohammad B. Vahid Far ,  Jesse A. Richmond ,  Yafei Bi

IPC分类号： G09G3/3258 ,  G09G3/3266 ,  G09G3/3291

摘要： An electronic device includes a display panel. The display panel includes a number of pixels, each of which includes a driving thin-film-transistor (TFT) and a light-emitting diode. Compensation circuitry external to the display panel applies offset data to pixel data for each pixel of the plurality of pixels before the pixel data is provided to the plurality of pixels.

公开(公告)号：US10089931B2

公开(公告)日：2018-10-02

申请号：US14990701

申请日：2016-01-07

申请人： Apple Inc.

发明人： Koorosh Aflatooni ,  Yafei Bi ,  Hung Sheng Lin ,  Mohammad Ali Jangda

IPC分类号： G09G3/32 ,  G09G3/20 ,  G09G3/3258 ,  H03M1/72 ,  H03M1/76

摘要： An electronic device that includes a display is provided. The display may have a brightness that is controlled using a series of cascaded digital-to-analog converter circuits. The display may be calibrated at a series of predetermined display brightness settings. For display brightness settings that fall between two consecutive display brightness settings in the series of predetermined display brightness settings, voltage interpolation operations may be performed to obtain the corresponding display brightness settings. Performing voltage interpolations instead of digital brightness setting interpolation helps minimize luminance jumps and unexpected color shifts when adjusting the brightness of the display.

公开(公告)号：US20180247586A1

公开(公告)日：2018-08-30

申请号：US15754107

申请日：2016-09-21

申请人： Apple Inc.

发明人： Mohammad B. Vahid Far ,  Yafei Bi ,  Kapil V. Sakariya ,  Hopil Bae ,  Shinya Ono ,  Thomas Charisoulis ,  Chin-Wei Lin

IPC分类号： G09G3/3216

CPC分类号： G09G3/3216 ,  G09G3/2003 ,  G09G3/2014 ,  G09G2300/06 ,  G09G2310/0235 ,  G09G2310/0272 ,  G09G2310/0294 ,  G09G2310/0297 ,  G09G2310/066 ,  G09G2320/064

摘要： Systems and apparatuses for hybrid micro-driver architectures having time multiplexing for driving displays are described. In one embodiment, a display (e.g., hybrid display architecture) includes a backplane and a micro-driver circuitry that is coupled to the backplane. The backplane includes circuitry (e.g., sample and hold circuitry) for sampling and holding analog data and for time multiplexing analog data. The micro-driver circuitry includes at least a capacitor of a ramp generator for generating a ramp voltage based on the analog data of the backplane and drive circuitry to cause at least one emission pulse for emitting a display element.

公开(公告)号：US10042459B2

公开(公告)日：2018-08-07

申请号：US14847404

申请日：2015-09-08

申请人： Apple Inc.

发明人： Christoph H. Krah ,  Yafei Bi ,  Kevin J. White

IPC分类号： G06F3/041 ,  G06F3/044

摘要： The disclosed embodiments relate to a system that provides power for a touch-enabled display, wherein the touch-enabled display cycles between a display mode and a touch mode. During the display mode, the system drives a display-mode voltage to the touch-enabled display through a power output, wherein the power output is coupled through a display-mode capacitor CD to ground. Next, during a transition from the display mode to the touch mode, the system couples the power output through a touch-mode capacitor CT to ground, wherein CT was previously charged to a touch-mode voltage, which causes the power output to rapidly transition to the touch-mode voltage. Then, during the touch mode, the system drives the touch-mode voltage through the power output.

公开(公告)号：US20180082635A1

公开(公告)日：2018-03-22

申请号：US15702443

申请日：2017-09-12

申请人： Apple Inc.

发明人： Jesse Aaron Richmond ,  Mohammad B. Vahid Far ,  Yafei Bi ,  Kingsuk Brahma

IPC分类号： G09G3/3233 ,  G09G3/00 ,  G09G3/3291 ,  H03F3/26 ,  G09G3/20

CPC分类号： G09G3/3233 ,  G09G3/006 ,  G09G3/2003 ,  G09G3/3291 ,  G09G2300/0809 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/027 ,  G09G2320/0285 ,  G09G2320/0295 ,  G09G2320/045 ,  H03F3/265

摘要： An electronic device includes a display panel. The display panel includes a plurality of pixels, each of which includes a driving thin-film-transistor (TFT) configured to receive driving data related to the operation of a respective pixel and a light-emitting diode configured to emit light based on the driving data provided to the TFT. The display panel also includes compensation circuitry configured to generate offset data from compressed offset data and apply the offset data to the pixel data to generate the driving data.

公开(公告)号：US20180082621A1

公开(公告)日：2018-03-22

申请号：US15698262

申请日：2017-09-07

申请人： Apple Inc.

发明人： 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分类号： G09G3/00

CPC分类号： G09G3/006 ,  G09G3/20 ,  G09G3/2092 ,  G09G2310/0291 ,  G09G2320/0209 ,  G09G2320/0219 ,  G09G2320/029 ,  G09G2320/041 ,  G09G2320/043 ,  G09G2320/0693 ,  G09G2330/06 ,  G09G2330/10 ,  G09G2330/12

摘要： 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：US20180053466A1

公开(公告)日：2018-02-22

申请号：US15275109

申请日：2016-09-23

申请人： Apple Inc.

发明人： Rui Zhang ,  Mohammad Hajirostam ,  Hung Sheng Lin ,  Mohammad B. Vahid Far ,  Sang Y. Youn ,  Zhen Zhang ,  Prashant Mandlik ,  Sun-Il Chang ,  Jie Won Ryu ,  Shengkui Gao ,  Hyunwoo Nho ,  Wei H. Yao ,  Yafei Bi ,  Yun Wang

IPC分类号： G09G3/32 ,  H01L51/00 ,  H01L27/32 ,  G11C19/28 ,  G01L1/22

CPC分类号： G09G3/006 ,  G01L1/2281 ,  G01M5/0033 ,  G01M5/0083 ,  G09G3/20 ,  G09G3/32 ,  G09G2300/0426 ,  G09G2330/12 ,  G09G2380/02 ,  G11C7/04 ,  G11C19/28 ,  H01L27/3276 ,  H01L51/0031 ,  H01L51/0097

摘要： An electronic device may have a flexible display such as an organic light-emitting diode display. A strain sensing resistor may be formed on a bent tail portion of the flexible display to gather strain measurements. Resistance measurement circuitry in a display driver integrated circuit may make resistance measurements on the strain sensing resistor and a temperature compensation resistor to measure strain. A crack detection line may be formed from an elongated pair of traces that are coupled at their ends to form a loop. The crack detection line may run along a peripheral edge of the flexible display. Crack detection circuitry may monitor the resistance of the crack detection line to detect cracks. The crack detection circuitry may include switches that adjust the length of the crack detection line and thereby allow resistances to be measured for different segments of the line.

公开(公告)号：US20150294626A1

公开(公告)日：2015-10-15

申请号：US14500738

申请日：2014-09-29

申请人： Apple Inc.

发明人： Yafei Bi ,  Wei H. Yao

IPC分类号： G09G3/32

CPC分类号： G09G3/3233 ,  G09G2320/0285 ,  G09G2320/0295 ,  G09G2320/043

摘要： A display may include an array of organic light-emitting diode display pixels having transistors characterized by threshold voltages subject to transistor variations. Compensation circuitry may be used to measure at transistor threshold voltage for a pixel. The threshold voltage may be sampled by controlling the pixel to sample the threshold voltage onto a capacitor at the pixel. The compensation circuitry may include sense circuitry that may be operated in combination with the pixel to transfer charge from the capacitor to the sense circuitry such that the threshold voltage is produced at an output of the sense circuitry. The compensation circuitry may generate compensation data based on the measured threshold voltage. During display operations, data circuitry may receive digital image data and process the digital image data along with the compensation data to generate analog data signals for the pixel.

摘要翻译： 显示器可以包括具有晶体管特性的晶体管变化的阈值电压的有机发光二极管显示像素的阵列。 补偿电路可用于测量像素的晶体管阈值电压。 可以通过控制像素将阈值电压采样到像素上的电容器上来对阈值电压进行采样。 补偿电路可以包括可以与像素结合操作以将电荷从电容器传输到感测电路的感测电路，使得在感测电路的输出处产生阈值电压。 补偿电路可以基于测量的阈值电压产生补偿数据。 在显示操作期间，数据电路可以接收数字图像数据并且与补偿数据一起处理数字图像数据以产生用于像素的模拟数据信号。

公开(公告)号：US20240363052A1

公开(公告)日：2024-10-31

申请号：US18683940

申请日：2022-08-12

申请人： Apple Inc.

发明人： Xiaofeng Wang ,  Yafei Bi

IPC分类号： G09G3/20

CPC分类号： G09G3/2096 ,  G09G2330/026 ,  G09G2330/027 ,  G09G2370/00

摘要： An electronic device may include a display, a display driver integrated circuit for controlling the display, and a system processor for running one or more applications on the electronic device. The display may be operated in at least a video mode and a command mode. In the video mode, the system processor operates as the primary timing circuit while the display driver integrated circuit operates as the secondary timing circuit. In the command mode, the display driver integrate circuit operates as the primary timing circuit while the system processor operates as the secondary timing circuit. The system processor may be configured to switch between video mode and the command mode without turning off the electronic device and without turning off the display driver integrated circuit. If desired, the display can be temporarily turned off during a mode switching event to hide potential front of screen artifacts.