Yifan Zhang, 363212 SW Genesee St, Seattle, WA 98126

2022037, Nov 24, 2022

May 3, 2022

17/735846

- Cupertino CA, US
ByoungSuk Kim - Palo Alto CA, US
Yifan Zhang - San Carlos CA, US
Hoon Sik Kim - Los Gatos CA, US
Yun Liu - Santa Clara CA, US
Hao Chen - Santa Clara CA, US
Paul S Drzaic - Morgan Hill CA, US
Mahdi Farrokh Baroughi - Santa Clara CA, US

G09G 5/10
G06F 1/16
G06F 3/01

The present disclosure relates to systems and methods to control brightness or color in foldable displays. An electronic device may include a foldable electronic display and processing circuitry. The foldable electronic display may have a first part and a second part that are foldable at a folding angle with respect to one another. The processing circuitry may provide image data to the foldable electronic display that varies based at least in part on the folding angle.

2020021, Jul 9, 2020

Feb 15, 2019

16/277842

- Cupertino CA, US
Yiqiang Nie - San Francisco CA, US
Yifan Zhang - San Carlos CA, US
Giovanni M. Agnoli - San Mateo CA, US
Paul S. Drzaic - Morgan Hill CA, US
David A. Doyle - San Francisco CA, US

G04G 9/00
G09G 3/20
G09G 3/3225

An electronic device such as a wristwatch device or other device may have a display. The display may be used to continuously display information such as watch face information. A watch face image on the display may contain watch face elements such as watch face hands, watch face indices, and complications. To reduce burn-in risk for watch face elements, control circuitry in the electronic device may impose burn-in constraints on attributes of the watch face elements such as peak luminance constraints, dwell time constraints, color constraints, constraints on the shape of each element, and constraints on element style. These constraints may help avoid situations in which static elements such as watch face indices create more burn-in than dynamic elements such as watch face hands.

2019008, Mar 14, 2019

Apr 9, 2018

15/948796

- Cupertino CA, US
Marc Albrecht - San Francisco CA, US
Paul S. Drzaic - Morgan Hill CA, US
Tae-Wook Koh - Los Gatos CA, US
Teun R. Baar - San Francisco CA, US
Yifan Zhang - San Carlos CA, US
Ramin Samadani - Menlo Park CA, US
Nicolas P. Bonnier - Campbell CA, US

G09G 5/10

Systems, methods, and devices are provided to reduce a likelihood of image burn-in on an electronic display. Such an electronic device may include image processing circuitry and an electronic display. The image processing circuitry may receive image data and analyze the image data for risk of image burn-in and, based at least in part on the analysis of the image data, reduce a risk of image burn-in at least in part by reducing a local maximum pixel luminance value in at least one of a plurality of regions of the image data over time or by reducing a dynamic range headroom of the image data. The electronic display may display the image data with a reduced risk of image burn-in on the pixels of the electronic display.

2018024, Aug 30, 2018

Apr 30, 2018

15/967402

- Cupertino CA, US
Yifan Zhang - San Carlos CA, US
Chieh-Wei Chen - Campbell CA, US
Tae-Wook Koh - Los Gatos CA, US
Hongwei Chang - San Jose CA, US
Paul S. Drzaic - Morgan Hill CA, US

G09G 3/3225
H05B 37/02
G09G 3/20
H05B 33/08

An electronic device may be provided with a display. A content generator may generate frames of image data to be displayed on the display. The display may have an array of pixels that emit light to display images. The pixels may contain light-emitting devices such as organic light-emitting diodes, quantum dot light-emitting diodes, and light-emitting diodes formed from discrete semiconductor dies. As a result of aging, the light producing capabilities of the light-emitting devices may degrade over time. The electronic device may have a temperature sensor that gathers temperature measurements and an ambient light sensor. A pixel luminance degradation compensator may apply compensation factors to uncorrected pixel luminance values associated with the frames of image data to produce corresponding corrected pixel luminance values for the display. The compensation factors may be based on aging history information such as pixel luminance history, ambient light exposure, and temperature measurements.

2017031, Nov 2, 2017

Jul 18, 2017

15/652629

- Fremont CA, US
ZHIGANG BAI - Fremont CA, US
Peng LUO - San Ramon CA, US
Jinqiu Zhang - Fremont CA, US
Ming SUN - San Jose CA, US
Xiaoyu YANG - Union City CA, US
Yifan ZHANG - San Jose CA, US
Xiaojun ZHANG - Fremont CA, US
Ming Jiang - San Jose CA, US

G11B 5/31
G11B 5/147
G11B 5/127
G11B 5/127
G11B 5/31
G11B 5/21

A magnetic write apparatus has a media-facing surface (MFS) and includes an auxiliary pole, coil(s) and a main pole having a pole tip and a yoke. The pole tip occupies part of the MFS. The yoke has a yoke length measured from the MFS in a yoke direction perpendicular to the MFS. The yoke length is less than four microns. The main pole has a total length in the yoke direction and a width in a cross-track direction. The main pole is continuous along the total length. The aspect ratio of the main pole is the total length divided by the width and exceeds one. The main pole includes surface(s) having a nonzero acute flare angle from the MFS. The auxiliary pole is adjacent to the main pole and recessed from the MFS by not more than 1.05 micron. The coil(s) energizes the main pole and have not more than two turns.

2017009, Mar 30, 2017

Jul 15, 2016

15/211714

- Cupertino CA, US
Yifan Zhang - San Mateo CA, US
Paul S. Drzaic - Morgan Hill CA, US
Paul C. Kelley - San Francisco CA, US
James P. Landry - Cupertino CA, US

H01L 51/00
G06F 3/041
H01L 51/52

An electronic device may have a hinge that allows the device to be flexed about a bend axis. A display may span the bend axis. To protect display elements such as pixel circuitry from excessive mechanical stress, the display may include one or more structural protective layers. A structural layer may be incorporated into the display stack as a supportive backing behind the pixel circuitry and/or as a protective cover over the pixel circuitry. The structural layer may include rigid portions and flexible portions. The flexible portions may contain flexible material that separates and adjoins adjacent rigid structures or that fills grooves between adjacent rigid portions. The rigid portions may be formed from thin sheets of glass or other transparent materials. The flexible material in the structural layer may be an elastomeric material having a refractive index that matches that of the glass sheets in the structural layer.