公开(公告)号：US10446116B2

公开(公告)日：2019-10-15

申请号：US15673138

申请日：2017-08-09

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Chaohao Wang ,  Cheuk Chi Lo ,  Chun-Yao Huang ,  Howard Tang ,  Paolo Sacchetto

IPC: G09G5/10 ,  G01K13/00 ,  G01K7/34 ,  G09G3/20 ,  G01K1/02 ,  G01K7/01 ,  G01K7/18 ,  G06F3/044 ,  G09G3/36 ,  G09G3/3225 ,  G09G3/34

Abstract: An apparatus is disclosed. In some examples, the apparatus comprises a display panel comprising a plurality of display pixels. In some examples, the apparatus comprises a plurality of temperature sensors disposed at different portions the display panel, wherein the plurality of temperature sensors comprise ratioed pairs of thin film transistors and the ratioed pairs of thin film transistors are formed on the display panel. In some examples, the apparatus comprises control circuitry for changing illumination properties of the plurality of display pixels based on changes is temperature detected by a proximate temperature sensor of the plurality of temperature sensors. In some examples, the ratioed pairs of thin film transistors are operated in a sub-threshold mode.

公开(公告)号：US10395349B1

公开(公告)日：2019-08-27

申请号：US15658169

申请日：2017-07-24

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Chaohao Wang ,  Paolo Sacchetto

IPC: G06T1/60 ,  G06T5/00 ,  G02F1/29

Abstract: An electronic device such as a head-mounted display or other display system may have a pair of adjustable focal length lenses. Control circuitry in the head-mounted display may adjust the adjustable focal length lenses so that the adjustable focal length lenses exhibit a series of different focal lengths. A graphics processor may generate undistorted image frames. The adjustable focal length lenses may exhibit a different amount of lens distortion at each focal length. To compensate for these different amounts of lens distortion, a distortion compensation circuit may predistort the undistorted image frames by an appropriate amount for each focal length. The distortion compensation circuit may include mapping and interpolation circuitry and look-up tables that store mapping and interpolation data for each of the focal lengths.

公开(公告)号：US20190180669A1

公开(公告)日：2019-06-13

申请号：US15944470

申请日：2018-04-03

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Paolo Sacchetto ,  Yingying Tang ,  Hyunwoo Nho ,  Sebastian Knitter ,  Chaohao Wang ,  Sheng Zhang

IPC: G09G3/20 ,  G09G3/34 ,  G09G3/36

Abstract: An electronic device that includes processing circuitry configured to generate a frame of image data that has a frame duration is provided. The electronic device includes a display that has a plurality of pixels. Each of the plurality of pixels displays image data from the frame of image data for a pixel emission period that is less than the frame duration. A first pixel of a column of pixels of the plurality of pixels begins displaying the image data from the frame of image data at a first time for a first duration. A second pixel of the column of pixels that is adjacent to the first pixel begins displaying the image data from the frame of image data at a second time for a second duration. The first and second durations are equal to the pixel emission period. The second time begins after the first duration of time.

公开(公告)号：US10276085B2

公开(公告)日：2019-04-30

申请号：US14973517

申请日：2015-12-17

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Paolo Sacchetto ,  Marc Albrecht ,  Christopher P. Tann ,  Shih-Chyuan Fan Jiang ,  Howard H. Tang ,  James E. C. Brown ,  Zhibing Ge

IPC: G09G3/20

Abstract: This application relates to systems, methods, and apparatus for compensating voltage for pixels of a display panel based on the location of the pixels within the display panel. An amount of voltage compensation is assigned to each pixel or a group of pixels within the display panel in accordance with a calibration of the display panel. During operation of the display panel, pixel data is generated for a location of the display panel, and the pixel data is modified according to the amount of voltage compensation corresponding to the location. By modifying the pixel data in this way, spatial variations in voltage across the display panel can be mitigated in order to reduce the occurrence of certain display artifacts at the display panel.

公开(公告)号：US10248257B2

公开(公告)日：2019-04-02

申请号：US16140532

申请日：2018-09-24

Applicant: Apple Inc.

Inventor： Chih-Wei Yeh ,  Chaohao Wang ,  Paolo Sacchetto ,  Wei Chen

IPC: G06F3/041 ,  G09G3/3258 ,  G09G3/36 ,  G09G3/20 ,  G09G3/3208 ,  G06F3/0488 ,  G06F3/0354 ,  G06F1/3234

Abstract: Devices and methods for improving image quality and decreasing power consumption of an electronic display are provided. The electronic device includes a display panel including a plurality of pixels configured to display an image, and to operate at multiple refresh rates. The electronic device also includes a processor configured to instruct the display panel to transition between the multiple refresh rates based at least in part on a blur effective width of the image.

公开(公告)号：US10242649B2

公开(公告)日：2019-03-26

申请号：US15664940

申请日：2017-07-31

Applicant: Apple Inc.

Inventor： Mahesh B. Chappalli ,  Chaohao Wang ,  Guy Côté ,  Marc Albrecht

IPC: G09G5/10 ,  G09G5/00 ,  G09G3/36 ,  G09G5/36

Abstract: Systems and methods for improving displayed image quality of an electronic display including a display pixel and a display driver are provided. A display pipeline receives input image data that indicates target luminance of the display pixel when displaying an image frame on the electronic display; determines a first bit group in pixel response corrected image data by mapping a first bit group in the input image data based at least in part on a first pixel response correction look-up-table; determines a second bit group in the pixel response corrected image data by mapping a second bit group in the input image data based at least in part on a second pixel response correction look-up-table; and outputs the pixel response corrected image data to the display driver to enable the display driver to facilitate displaying the image frame by writing the display pixel based on the pixel response corrected image data.

公开(公告)号：US20190088199A1

公开(公告)日：2019-03-21

申请号：US16132320

申请日：2018-09-14

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Chengrui Le ,  Hopil Bae ,  Mahdi Farrokh Baroughi ,  David W. Lum ,  Adam Adjiwibawa ,  Chaohao Wang ,  Paolo Sacchetto ,  Wei H. Yao ,  Enkhamgalan Dorjgotov ,  Michael Slootsky ,  Giovanni Carbone ,  Derek K. Shaeffer ,  Henry C. Jen ,  Shingo Hatanaka ,  Hasan Akyol

IPC: G09G3/3233 ,  G09G3/3258

Abstract: An electronic device includes a display having a reference array that includes a first pixel. The display also includes a first emission power supply coupled to the first pixel. The display further includes an active array having a second pixel. The display also includes a second emission power supply coupled to the second pixel.

公开(公告)号：US20180336863A1

公开(公告)日：2018-11-22

申请号：US15842364

申请日：2017-12-14

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Chaohao Wang ,  Paolo Sacchetto ,  Yunhui Hou

IPC: G09G3/36

CPC classification number: G09G3/3696 ,  G09G3/3648 ,  G09G3/3655 ,  G09G2300/0426 ,  G09G2320/02 ,  G09G2320/0219 ,  G09G2320/0223 ,  G09G2320/0247 ,  G09G2320/029 ,  G09G2360/145

Abstract: The present disclosure relates to systems and methods of accounting for the kickback voltage in an LCD display. For example, a method may include obtaining, via a processor, a difference between a nominal voltage of a common electrode of a display and a measured voltage of the common electrode. The processor may obtain image data associated with an image to be displayed on the display. The processor may adjust the image data of a pixel of the display based on the difference. The processor may output an image signal indicative of the adjusted image data to a pixel electrode of the pixel.

公开(公告)号：US09997121B2

公开(公告)日：2018-06-12

申请号：US14718515

申请日：2015-05-21

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Hao Nan ,  Paolo Sacchetto ,  Zhibing Ge

IPC: G09G3/36

CPC classification number: G09G3/3614 ,  G09G3/3648 ,  G09G2320/0204 ,  G09G2320/0247 ,  G09G2320/0257 ,  G09G2320/041 ,  G09G2330/021 ,  G09G2340/0435 ,  G09G2340/16 ,  G09G2360/18

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. 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 implement a physically derived circuit model of the pixels. A charge accumulation input response matrix and a charge accumulation state response matrix for the model may be stored in look-up table circuitry and used in computing a current charge accumulation state based on current pixel voltage information and previous state information. The impact of temperature, backlight illumination level, frame duration, and other factors may be taken into account in evaluating the current charge accumulation state.

公开(公告)号：US20180081234A1

公开(公告)日：2018-03-22

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 ,  G09G3/36 ,  G09G3/20

CPC classification number: G02F1/133385 ,  G09G3/2048 ,  G09G3/3233 ,  G09G3/3633 ,  G09G2320/0233 ,  G09G2320/0285 ,  G09G2320/029 ,  G09G2320/0295 ,  G09G2320/041 ,  G09G2320/043 ,  G09G2320/045

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.