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：US10825385B2

公开(公告)日：2020-11-03

申请号：US15701056

申请日：2017-09-11

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Chih-Wei Yeh ,  Chin-Wei Lin ,  Hung Sheng Lin ,  Hyunwoo Nho ,  Injae Hwang ,  Jie Won Ryu ,  Junhua Tan ,  Paolo Sacchetto ,  Rui Zhang ,  Shengkui Gao ,  Sun-Il Chang ,  Wei H. Yao ,  Howard H. Tang

IPC: G09G3/3233 ,  G09G3/3275

Abstract: An apparatus receives current image frame data and data relating to at least one previous image frame for an electronic display. One or more parameters related to hysteresis of transistors in the electronic display are sensed. A correlation device, such as a look-up table, receives the sensed parameter or parameters and the data relating to one or more image frames, and uses this information, at least in part, to output an appropriate compensation signal for the current image frame data. The compensated current image frame data may then be supplied to the electronic display to reduce or eliminate the effects of hysteresis on the displayed image.

公开(公告)号：US20200335040A1

公开(公告)日：2020-10-22

申请号：US16802354

申请日：2020-02-26

Applicant: Apple Inc.

Inventor： Hyunwoo Nho ,  Myungjoon Choi ,  Hyunsoo Kim ,  Mohammad Ali Jangda ,  Jie Won Ryu ,  Shiping Shen ,  Kingsuk Brahma ,  Chaohao Wang ,  Wei H. Yao ,  Alex H. Pai

IPC: G09G3/3258

Abstract: An electronic device includes a display having multiple regions of pixels. Each pixel includes a diode that emits light based on an amount of current through the diode and a transistor that controls the amount of current flowing through the diode. The electronic device includes driver-integrated circuitry that reduces hysteresis in a first transistor of a first pixel of a region of pixels, settles a threshold voltage of the first transistor, applies a test voltage to the first transistor, and senses a current across the first transistor. The electronic device includes processing circuitry that determines a predetermined voltage based on the current and a predetermined current-voltage relationship determined at an initial temperature, determines a voltage difference between the test voltage and the predetermined voltage, and applies the predetermined voltage and the voltage difference to a second transistor of a second pixel of the region of pixels.

公开(公告)号：US10789902B2

公开(公告)日：2020-09-29

申请号：US16113132

申请日：2018-08-27

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Brijesh Tripathi ,  Christopher Philip Alan Tann ,  David S. Zalatimo ,  Guy Cote ,  Hao Nan ,  Marc Albrecht ,  Paolo Sacchetto ,  Sandro H. Pintz

IPC: G09G3/36

Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The image frames may be displayed with positive and negative polarities to help reduce charge accumulation effects. A charge accumulation tracker may analyze the image frames to determine when there is a risk of excess charge accumulation. The charge accumulation tracker may analyze information on gray levels, frame duration, and frame polarity. The charge accumulation tracker may compute a charge accumulation metric for entire image frames or may process subregions of each frame separately. When subregions are processed separately, each subregion may be individually monitored for a risk of excess charge accumulation.

公开(公告)号：US20200272022A1

公开(公告)日：2020-08-27

申请号：US15931430

申请日：2020-05-13

Applicant: Apple Inc.

Inventor： Graham B. Myhre ,  Giovanni Carbone ,  Shih-Chyuan Fan Jiang ,  Sheng Zhang ,  Chaohao Wang

IPC: G02F1/29 ,  G06F3/01

Abstract: An electronic device such as a head-mounted device may have displays that are viewable by the eyes of a viewer through adjustable lenses. The adjustable lenses may be liquid crystal lenses. A camera and other sensors in the head-mounted device may monitor the eyes of the user and gather other information. Control circuitry in the head-mounted device may control the adjustable lenses based on measured characteristics of the eyes of the user such as interpupillary distance and direction-of-view. The control circuitry may match the distance between the centers of the adjustable lenses to the measured interpupillary distance and may align the lens centers with the measured direction-of-view. The adjustable lenses may have transparent electrodes that are supplied with time-varying control signals by the control circuitry.

公开(公告)号：US10706817B2

公开(公告)日：2020-07-07

申请号：US16146910

申请日：2018-09-28

Applicant: Apple Inc.

Inventor： Yingying Tang ,  Chaohao Wang ,  Sheng Zhang ,  Yunhui Hou ,  Paolo Sacchetto ,  Koorosh Aflatooni ,  Gokhan Avkarogullari ,  Guy Cote ,  Mahesh B. Chappalli ,  Peter F. Holland

IPC: G09G5/10 ,  G09G3/20 ,  G09G3/3225 ,  G09G3/36 ,  G09G3/3208

Abstract: An electronic device is provided. The electronic device includes a display that is configured to show content that includes a plurality of frames. The plurality of frames includes a first frame that is associated with a pre-transition value. The plurality of frames also includes a second frame that is associated with a current frame value that corresponds to a first luminance. Additionally, the electronic device is configured to determine an overdriven current frame value corresponding to a second luminance that is greater than the first luminance. The electronic device is also configured to display the second frame using the overdriven current frame value.

公开(公告)号：US10690991B1

公开(公告)日：2020-06-23

申请号：US15683993

申请日：2017-08-23

Applicant: Apple Inc.

Inventor： Graham B. Myhre ,  Giovanni Carbone ,  Shih-Chyuan Fan Jiang ,  Sheng Zhang ,  Chaohao Wang

IPC: G02F1/29 ,  G06F3/01 ,  G06T7/60

Abstract: An electronic device such as a head-mounted device may have displays that are viewable by the eyes of a viewer through adjustable lenses. The adjustable lenses may be liquid crystal lenses. A camera and other sensors in the head-mounted device may monitor the eyes of the user and gather other information. Control circuitry in the head-mounted device may control the adjustable lenses based on measured characteristics of the eyes of the user such as interpupillary distance and direction-of-view. The control circuitry may match the distance between the centers of the adjustable lenses to the measured interpupillary distance and may align the lens centers with the measured direction-of-view. The adjustable lenses may have transparent electrodes that are supplied with time-varying control signals by the control circuitry.

公开(公告)号：US10665157B2

公开(公告)日：2020-05-26

申请号：US16374606

申请日：2019-04-03

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Shengkui Gao ,  Yingying Tang ,  Sean C. Chang ,  Mohammad B. Vahid Far ,  Kasra M. Omid-Zohoor ,  Chumin Zhao ,  Jingyu Huang ,  Mohammad Ali Jangda ,  Hyunwoo Nho ,  Chaohao Wang ,  Marc J. DeVincentis ,  Marc Albrecht ,  Warren S. Rieutort-Louis

IPC: G09G3/3208 ,  G09G3/20

Abstract: Systems and methods reduce likelihood of hysteresis that reduces perceived image quality of a subsequent image frame by toggling the display pixels to relax the display pixels by overwriting previous image frame data. During non-emission periods of the pixels, the pixels may be pre-toggled or exercised to improve response time and accuracy of the pixel. Data for pixels being programmed may also be used to pre-toggle other pixels reducing overhead but increasing cross-talk. Since the amount of cross-talk is related to content of the pixels being pre-toggled, a line buffer may be used to store image data for the pixels being pre-toggled. This stored image data may be used to determine how much pre-compensation is to be applied to data for the pixels being programmed. In other words, an amount of compensation applied is based at least in part on the content (e.g., greyscale levels) of the image data.

公开(公告)号：US10657874B2

公开(公告)日：2020-05-19

申请号：US15967892

申请日：2018-05-01

Applicant: Apple Inc.

Inventor： Yingying Tang ,  Chaohao Wang ,  Sheng Zhang ,  Yunhui Hou ,  Paolo Sacchetto ,  Koorosh Aflatooni ,  Gokhan Avkarogullari ,  Guy Cote ,  Mahesh B. Chappalli ,  Peter F. Holland

IPC: G09G3/20 ,  G09G5/06 ,  G09G3/36 ,  G09G3/3208

Abstract: An electronic device is provided. The electronic device includes a display that is configured to show content that includes a plurality of frames. The plurality of frames includes a first frame that is associated with a pre-transition value. The plurality of frames also includes a second frame that is associated with a current frame value that corresponds to a first luminance. Additionally, the electronic device is configured to determine an overdriven current frame value corresponding to a second luminance that is greater than the first luminance. The electronic device is also configured to display the second frame using the overdriven current frame value.

公开(公告)号：US10522084B2

公开(公告)日：2019-12-31

申请号：US15711585

申请日：2017-09-21

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Chaohao Wang ,  Paolo Sacchetto ,  Paul S. Drzaic ,  Wei Chen ,  Wei H. Yao

IPC: G09G3/3241 ,  G09G3/3233 ,  G09G3/20

Abstract: A display device may include a display having a plurality of pixels. The display device may also include a replica pixel circuit having a switching device configured to output a first current based on a received voltage, a light-emitting diode (LED) configured to illuminate to a first gray level based on the first current output by the switching device, and current mirror circuitry configured to generate a second current that mirrors the first current. In addition, the replica pixel circuit may include a current source configured to output a reference current based on a voltage value that corresponds to the received voltage, comparator circuitry configured to determine a difference between the second current and the reference current, and voltage adjustment circuitry configured to adjust a source voltage output provided to the plurality of pixels based on the difference.