公开(公告)号：US20190122636A1

公开(公告)日：2019-04-25

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

CPC classification number: G09G5/10 ,  G09G3/2007 ,  G09G3/3208 ,  G09G3/3225 ,  G09G3/3607 ,  G09G3/3648 ,  G09G2320/0242 ,  G09G2320/0252 ,  G09G2320/0285 ,  G09G2320/103 ,  G09G2340/16

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：US20190088205A1

公开(公告)日：2019-03-21

申请号：US16132324

申请日：2018-09-14

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Yunhui Hou ,  Chaohao Wang

IPC: G09G3/3258

Abstract: A mobile electronic device includes a display having an active array and a reference array. The active array includes a pixel and the reference array includes a reference pixel. The mobile electronic device also includes processing circuitry communicatively coupled to the display. The processing circuitry drives the pixel based at least in part on a degraded current-voltage relationship of the pixel, a reference current-voltage relationship of the reference pixel, and an aged current-voltage relationship.

公开(公告)号：US20180350283A1

公开(公告)日：2018-12-06

申请号：US15703843

申请日：2017-09-13

Applicant: Apple Inc.

Inventor： Shih-Chyuan Fan Jiang ,  Zhibing Ge ,  Lei Zhao ,  Chaohao Wang ,  Paul P. Lu

IPC: G09G3/00 ,  G09G3/36 ,  H01L27/12 ,  H01L29/66 ,  G02F1/1337

Abstract: Liquid crystal display systems and methods of operation are described. In an embodiment, a liquid crystal display pixel cell includes an insulation layer spanning over a passivation layer and the plurality of signal electrodes such that it separates the signal electrodes from polymer alignment layer for the liquid crystal. In an embodiment, a method of operating a liquid crystal display panel includes temporal compensation of the Vcom value as a function of time and one or more operating parameters.

公开(公告)号：US20180166032A1

公开(公告)日：2018-06-14

申请号：US15890517

申请日：2018-02-07

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

CPC classification number: G09G3/3614 ,  G09G2320/0204 ,  G09G2320/0247 ,  G09G2320/0257 ,  G09G2320/046 ,  G09G2340/0435 ,  G09G2360/16

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：US09984608B2

公开(公告)日：2018-05-29

申请号：US14986181

申请日：2015-12-31

Applicant: Apple Inc.

Inventor： Paolo Sacchetto ,  Christopher P. Tann ,  Taesung Kim ,  Sandro H. Pintz ,  Marc Albrecht ,  Chaohao Wang ,  David S. Zalatimo ,  Fenghua Zheng ,  Zhibing Ge

IPC: G09G3/20 ,  G09G3/36 ,  H04N1/60 ,  H04N9/73

CPC classification number: G09G3/20 ,  G09G2310/0254 ,  G09G2310/063 ,  G09G2310/08 ,  G09G2320/0204 ,  G09G2340/0435

Abstract: System and method for improving displayed image quality of an electronic display that displays a first image frame by applying a first voltage to a display pixel and a second image frame directly before the first image frame by applying a second voltage to the display pixel. A display pipeline is communicatively coupled to the electronic display and receives first image data corresponding with the first image frame, where the image data includes a first grayscale value corresponding with the display pixel. Additionally the display pipeline determines an inversion balancing grayscale offset based at least in part on the first grayscale value when polarity of the first voltage and polarity of the second voltage are the same and determines magnitude of the first voltage by applying the inversion balancing grayscale offset to the first grayscale value to reduce likelihood of a perceivable luminance spike when displaying the first image frame.

公开(公告)号：US09952642B2

公开(公告)日：2018-04-24

申请号：US14500646

申请日：2014-09-29

Applicant: APPLE INC.

Inventor： Chaohao Wang ,  Louis Luh ,  Jun Qi ,  Cheng Chen ,  Jun Jiang ,  Paolo Sacchetto ,  Marc Albrecht

IPC: G09G3/20 ,  G06F1/32 ,  G09G5/00

CPC classification number: G06F1/32 ,  G09G5/003 ,  G09G2320/0247 ,  G09G2330/021 ,  G09G2340/0435 ,  G09G2360/16

Abstract: Systems and methods for operating a display by dynamically determining a refresh rate for the display. In certain implementations, a processor determines a number of pixels having medium grayscale levels from a histogram for the image. If the number does not exceed a threshold, the processor sets a refresh rate for the display to a first refresh rate. In certain implementations, if the number exceeds a threshold, the processor may set the refresh rate for the display to a second refresh rate. Moreover, the first refresh rate may be lower than the second threshold. In some implementations, the image may be analyzed by subdividing the image into blocks and determining a refresh rate based on grayscale levels or distributions in the blocks. Based on the analysis of the blocks, a corresponding refresh rate may be selected.

公开(公告)号：US09947259B2

公开(公告)日：2018-04-17

申请号：US15331722

申请日：2016-10-21

Applicant: Apple Inc.

Inventor： Jiaying Wu ,  Lu Zhang ,  Cheng Chen ,  Gabriel Marcu ,  Chaohao Wang ,  Ming Xu ,  Ricardo Motta ,  Wei Chen ,  John Z. Zhong

IPC: G09G5/00 ,  G09G3/20 ,  G09G5/02 ,  G09G3/34

CPC classification number: G09G3/2003 ,  G09G3/3413 ,  G09G5/02 ,  G09G2320/0242 ,  G09G2320/0261 ,  G09G2320/0666 ,  G09G2360/144 ,  G09G2360/145

Abstract: An electronic device may include a display having an array of display pixels and having display control circuitry that controls the operation of the display. The display control circuitry may adaptively adjust the display output based on ambient lighting conditions. For example, in cooler ambient lighting conditions such as those dominated by daylight, the display may display neutral colors using a relatively cool white. When the display is operated in warmer ambient lighting conditions such as those dominated by indoor light sources, the display may display neutral colors using a relatively warm white. Adapting to the ambient lighting conditions may ensure that the user does not perceive color shifts on the display as the user's vision chromatically adapts to different ambient lighting conditions. Adaptively adjusting images in this way can also have beneficial effects on the human circadian rhythm by displaying warmer colors in the evening.

公开(公告)号：US20180082634A1

公开(公告)日：2018-03-22

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

CPC classification number: G09G3/3233 ,  G09G3/3275 ,  G09G2300/0861 ,  G09G2310/0262 ,  G09G2320/0233 ,  G09G2320/0257 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2320/0693 ,  G09G2330/02 ,  G09G2330/12 ,  G09G2340/16 ,  G09G2360/18

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：US20170243548A1

公开(公告)日：2017-08-24

申请号：US15275374

申请日：2016-09-24

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Lu Zhang ,  Zhibing Ge ,  Shih-Chyuan Fan Jiang ,  Ilie Garbacea ,  Marc Albrecht ,  Kingsuk Brahma ,  Hopil Bae ,  Paolo Sacchetto ,  Jie Won Ryu ,  Sandro H. Pintz ,  Chengrui Le

IPC: G09G3/34 ,  G09G3/36 ,  G09G3/3258

CPC classification number: G09G3/20 ,  G09G2320/0233 ,  G09G2320/0285 ,  G09G2320/029 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2320/0626 ,  G09G2320/0693 ,  G09G2340/0435 ,  G09G2360/16

Abstract: Systems and methods are provided for improving displayed image quality of an electronic display that includes a display pixel. The electronic display displays a first image frame directly after a second image frame by applying an analog electrical signal to the display pixel. To facilitate display of the first image frame, circuitry receives image data corresponding to the image frame, in which the image data includes a grayscale value that indicates target luminance of the display pixel; determines expected refresh rate of the first image frame based at least in part on actual refresh rate of the second image frame; determines a pixel response correction offset based at least in part on the expected refresh rate of the first image frame; and determines processed image data by applying the pixel response correction offset to the grayscale value, in which the processed image data indicates magnitude of the analog electrical signal.

公开(公告)号：US09599865B2

公开(公告)日：2017-03-21

申请号：US14702556

申请日：2015-05-01

Applicant: Apple Inc.

Inventor： Zhibing Ge ,  Chaohao Wang ,  Cheng Chen ,  Kyung Wook Kim ,  Ming-Chin Hung ,  Paolo Sacchetto ,  Shih Chang Chang ,  Shih-Chyuan Fan Jiang ,  Shang-Chih Lin

IPC: G06F3/041 ,  G02F1/1343 ,  G06F3/147 ,  G02F1/1368 ,  G02F1/1335 ,  G02F1/1333

CPC classification number: G02F1/134309 ,  G02F1/133514 ,  G02F1/1343 ,  G02F1/13439 ,  G02F1/1368 ,  G02F2001/133357 ,  G02F2001/134372 ,  G06F3/147

Abstract: A display may have upper and lower display layers. A layer of liquid crystal material may be interposed between the upper and lower display layers. The display layers may have substrates. A thin-film transistor layer may have a layer of thin-film transistor structures on a substrate such as a clear glass layer. A planarization layer may be formed on the thin-film transistor structures. A transparent conductive layer may be formed on the planarization layer. The display may have a dielectric layer on the transparent conductive layer. Pixels may be formed in the display layers. The pixels may include pixel electrodes having fingers. The fingers may be formed on the dielectric layer. Trenches in the dielectric layer may be formed between the fingers. The trenches may extend to the transparent conductive layer or may be formed only partway into the dielectric layer.