公开(公告)号：US10359885B2

公开(公告)日：2019-07-23

申请号：US15650770

申请日：2017-07-14

Applicant: Apple Inc.

Inventor： Kingsuk Brahma ,  Jie Won Ryu ,  Hopil Bae ,  Yafei Bi

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

Abstract: 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：US10209551B2

公开(公告)日：2019-02-19

申请号：US15677267

申请日：2017-08-15

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Jesse A. Richmond ,  Mohammad B. Vahid Far ,  Tobias Jung ,  Jie Won Ryu ,  Hyunwoo Nho ,  Kingsuk Brahma ,  Sun-Il Chang ,  Junhua Tan ,  Marc Albrecht ,  Chih-Wei Yeh ,  Chaohao Wang

IPC: G02F1/1333 ,  G09G3/20 ,  G09G3/36 ,  G09G3/3233

Abstract: Devices, storage media, and methods for compensating for aging and temperature variations using dual-loop compensation are provided. The compensating for temperature and aging variations of one or more pixels of the display using a coarse scan loop updated at a faster rate. Compensation also includes compensating for aging variations of the one or more pixels of the display using a fine scan loop updated at a slower rate.

公开(公告)号：US20180342193A1

公开(公告)日：2018-11-29

申请号：US15700971

申请日：2017-09-11

Applicant: Apple Inc.

Inventor： Shiping Shen ,  Derek K. Shaeffer ,  Baris Cagdaser ,  Hyunwoo Nho ,  Kingsuk Brahma ,  Hung Sheng Lin ,  Injae Hwang ,  Jie Won Ryu ,  Hyunsoo Kim ,  Junhua Tan ,  Rui Zhang ,  Shengkui Gao ,  Mohammad B. Vahid Far ,  Jesse A. Richmond ,  Sun-Il Chang

IPC: G09G3/20 ,  G09G3/3233 ,  G09G3/36

CPC classification number: G09G3/2092 ,  G09G3/006 ,  G09G3/20 ,  G09G3/3233 ,  G09G3/3648 ,  G09G2320/0209 ,  G09G2320/0219 ,  G09G2320/0233 ,  G09G2320/0285 ,  G09G2320/0295 ,  G09G2320/0693 ,  G09G2330/021 ,  G09G2330/06 ,  G09G2330/12

Abstract: Electronic devices and methods for compensating for noise in a display that includes sensing a current in a sensing channel of the display. Compensating for the noise also includes sensing an observation current from noise in an observation channel of the display and scaling the observation current to generate a scaled observation current. The scaled observation current is subtracted from the sense current to generate a compensated output. The compensated output is used to drive compensation operations of the display based at least in part on the compensated output to reduce effects of the noise.

公开(公告)号：US20180082631A1

公开(公告)日：2018-03-22

申请号：US15674208

申请日：2017-08-10

Applicant: Apple Inc.

Inventor： Sun Il Chang ,  Hung Sheng Lin ,  Hyunwoo Nho ,  Jie Won Ryu ,  Junhua Tan ,  Chih-Wei Yeh ,  Chaohao Wang ,  Paolo Sacchetto

IPC: G09G3/3225 ,  G09G3/36

CPC classification number: G09G3/3225 ,  G09G3/20 ,  G09G3/3648 ,  G09G2320/0233 ,  G09G2320/0285 ,  G09G2320/0295 ,  G09G2320/041 ,  G09G2320/0646 ,  G09G2320/0693 ,  G09G2340/0435 ,  G09G2340/16 ,  G09G2360/16

Abstract: Systems, methods, and devices for adjusting image display on an electronic display by predicting a temperature change of the electronic display due to heat-producing components near the display or due to changes in content. An electronic device may include an electronic display and processing circuitry. The electronic display may include pixels with behaviors that vary with temperature. As such, the processing circuitry may generate image data to send to the electronic display and adjust the image data or vary an operation of the electronic display based at least in part on a predicted temperature effect on at least part of the active area of the electronic display. The processing circuitry may determine the predicted temperature effect at least in part due to a first heat producing component or changes in content of the image 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

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

CPC classification number: 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

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：US20180053466A1

公开(公告)日：2018-02-22

申请号：US15275109

申请日：2016-09-23

Applicant: Apple Inc.

Inventor： 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: G09G3/32 ,  H01L51/00 ,  H01L27/32 ,  G11C19/28 ,  G01L1/22

CPC classification number: 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

Abstract: 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.