公开(公告)号：US11081053B2

公开(公告)日：2021-08-03

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 ,  H01L29/786

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：US20210012711A1

公开(公告)日：2021-01-14

申请号：US16505556

申请日：2019-07-08

Applicant: Apple Inc.

Inventor： Ruo-Gu Huang ,  Kyung Hoae Koo ,  Michael H. Lim ,  Chuang Qian ,  Weijun Yao ,  Yue Jack Chu

IPC: G09G3/3233 ,  G09G3/3291

Abstract: A display driver is disclosed that reduces first frame dimming and flicker in light-emitting diode pixels of a display device. The display driver may receive a display brightness value and determine a value of a dynamic supply voltage parameter based on the display brightness value. Over a first time interval, the display driver may apply a supply voltage that is based on the dynamic supply voltage parameter to one of a gate of a drive transistor of a light-emitting-diode circuit and a channel of the drive transistor. Over a second time interval, the display driver may apply a parking voltage to an anode of a light-emitting diode of the light-emitting-diode circuit and to the channel of the drive transistor. The value of the parking voltage may be below a threshold voltage of the light-emitting diode and correspond to the value of the dynamic supply voltage parameter.

公开(公告)号：US10825419B2

公开(公告)日：2020-11-03

申请号：US15716708

申请日：2017-09-27

Applicant: Apple Inc.

Inventor： Yue Jack Chu ,  Christopher P. Tann ,  Arthur L. Spence ,  Brad W. Simeral ,  Yafei Bi ,  Jiayi Jin ,  Ruo-Gu Huang ,  Haifeng Li ,  Weijun Yao ,  Chaohao Wang

IPC: G06F3/14 ,  G09G5/00 ,  G06T1/60 ,  G09G5/36 ,  G09G5/395

Abstract: In situations with reduced image changes, display panels, such as the ones disclosed herein, may reduce their power consumption by performing self-refresh cycles, in which they may display locally stored data in the display panel instead of retrieving it from an image buffer. Methods and circuitry for management of the self-refresh cycle may reduce jitter, luminance errors, and/or flickers that may be caused by untimely self-refresh cycles that may occur as a result of latency in the image buffer. In some implementations, the display panel may have a dedicated low latency input that notifies an arrival of an incoming image. In some implementations, the self-refresh cycles of the panel may be managed by a host or a buffer that is responsible for sending the images.

公开(公告)号：US10712867B2

公开(公告)日：2020-07-14

申请号：US15522737

申请日：2015-10-27

Applicant: Apple Inc.

Inventor： Yingxuan Li ,  Weijun Yao ,  Vivek Pant ,  Martin Paul Grunthaner ,  Marduke Yousefpor ,  Sumant Ranganathan

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/0354

Abstract: A touch sensor panel is disclosed. In some examples, the touch sensor panel comprises a plurality of touch node electrodes. In some examples, the touch sensor panel comprises a touch controller configured to drive and sense the plurality of touch node electrodes in a fully bootstrapped configuration to obtain a fully bootstrapped touch image, drive and sense the plurality of touch node electrodes in a second configuration, different from the fully bootstrapped configuration, to obtain a second touch image, the second touch image including an effect of water on the touch sensor panel, and determine a final touch image based on the fully bootstrapped touch image and the second touch image, the final touch image not including the effect of the water on the touch sensor panel. In some examples, the second configuration comprises a mutual capacitance configuration. In some examples, the second configuration comprises a partially bootstrapped configuration.

公开(公告)号：US10705658B2

公开(公告)日：2020-07-07

申请号：US15507722

申请日：2014-09-22

Applicant: Apple Inc.

Inventor： Yingxuan Li ,  Marduke Yousefpor ,  Weijun Yao

IPC: G06F3/044 ,  G06F3/041

Abstract: A touch controller is disclosed. The touch controller can include sense circuitry configured to sense, during a self-capacitance portion of a touch frame, first one or more self-capacitances associated with a first plurality of touch pixels on a touch sensor panel, and sense, during a mutual capacitance portion of the touch frame, first one or more mutual capacitances associated with the first plurality of touch pixels. A touch processor can be configured to, based on the first one or more self-capacitances and the first one or more mutual capacitances, sense a single touch event associated with the touch frame.

公开(公告)号：US10437385B2

公开(公告)日：2019-10-08

申请号：US15094970

申请日：2016-04-08

Applicant: Apple Inc.

Inventor： Kanke Gao ,  Wei Hsin Yao ,  Yingxuan Li ,  Weijun Yao

IPC: G06F3/041 ,  G06F3/044

Abstract: Electrode configurations for reducing wobble error for a stylus translating on a surface over and between electrodes of a touch sensor panel are disclosed. In some examples, electrodes associated with a more linear signal profile are correlated with lower wobble error. In some examples, electrodes can have projections which can interleave with projections of adjacent electrodes. In some configurations, projections of adjacent electrodes can be interleaved in one-dimension; in other configurations, projections of adjacent electrodes can be interleaved in two-dimensions. In some configurations, the width and length of one or more projections in an electrode can be selected based on a desired signal profile for that electrode.

公开(公告)号：US20190057633A1

公开(公告)日：2019-02-21

申请号：US16146997

申请日：2018-09-28

Applicant: Apple Inc.

Inventor： Yongjun Li ,  Jiayi Jin ,  Maofeng Yang ,  Jun Li ,  Weijun Yao ,  Derek K. Shaeffer ,  Baris Cagdaser

IPC: G09G3/00 ,  G09G3/20 ,  G09G3/3258 ,  G06F3/048

Abstract: A method of adjusting a test gray voltages applied to a component of an electronic display during a test frame between image frames, wherein the adjustment is based at least in part on the control signal to the component during a prior image frame. The method may reduce hysteresis effects on the extraction of sensed currents of the component during the test frame, which may increase the accuracy and/or consistency of determined parameters evaluated from the sensed currents. The determined parameters may include temperature and/or aging of the component. The determined parameters may be used to adjust control signals for the component and other components in a region near the component during the next image frame.

公开(公告)号：US10134349B2

公开(公告)日：2018-11-20

申请号：US15498287

申请日：2017-04-26

Applicant: Apple Inc.

Inventor： Rui Zhang ,  Guangmao Xing ,  Paolo Sacchetto ,  Marc Joseph Devincentis ,  Anshi Liang ,  Weijun Yao ,  Sang Y. Youn ,  Hyunwoo Nho

IPC: G09G3/36 ,  G09G3/3225 ,  H04B1/10 ,  G09G3/20

Abstract: Aspects of the subject technology relate to electronic devices with displays. A display may include an array of display pixels and control circuitry for operating the display. In some scenarios, interference signals from other components of the electronic device or additional external devices can couple to the control circuitry for the display and cause distortions in displayed data. Display frames may be displayed by an electronic device display with a varying phase. The varying phase display frames may each include a distortion pattern that also varies from frame to frame due to the varying phase. The varying distortion patterns may average out or visibly cancel when viewed by a user such that no visible artifact of the interference signal is seen by the user. The varying phase can be actively tuned to the interference signal if desired.

公开(公告)号：US20180308413A1

公开(公告)日：2018-10-25

申请号：US15767637

申请日：2017-07-17

Applicant: Apple Inc.

Inventor： Jiayi Jin ,  Myung-Je Cho ,  Paolo Sacchetto ,  Weijun Yao

IPC: G09G3/20 ,  G06F3/041 ,  G09G3/3208 ,  G09G3/36

CPC classification number: G09G3/3607 ,  G09G3/20 ,  G09G2310/0232 ,  G09G2320/0285 ,  G09G2320/0626

Abstract: A display may have curved edges such as rounded corners. Pixels in the display may be controlled so that the active area of the display has the desired curved edge shape. In order to maximize the apparent smoothness of the curved edge, the display may include circuitry that dims some of the pixels based on their location relative to a spline for the curved edge. The display circuitry may include a multiplication circuit that receives image data as a first input and dimming factors from a gain table as a second input. The image data may include a brightness level for each pixel in the array of pixels. The multiplication circuit may multiply the brightness level for each pixel by its respective dimming factor. This modified image data may then be supplied to the imaging pixels using display driver circuitry.

公开(公告)号：US20180025694A1

公开(公告)日：2018-01-25

申请号：US15708795

申请日：2017-09-19

Applicant: Apple Inc.

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

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

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.