公开(公告)号：US10467985B2

公开(公告)日：2019-11-05

申请号：US16222492

申请日：2018-12-17

Applicant: Apple Inc.

Inventor： Koorosh Aflatooni ,  Minhyuk Choi ,  Mohammad Ali Jangda ,  Sang Y. Youn ,  Yafei Bi ,  Jean-Pierre Guillou ,  Wei Y. Yao

IPC: G09G5/10 ,  G06K9/00

Abstract: An electronic device may have a display with an array of pixels. The device may have an array of components such as an array of light sensors for capturing fingerprints of a user through an array of corresponding transparent windows in the display. A capacitive touch sensor, proximity sensor, force sensor, or other sensor may be used by control circuitry in the device to monitor for the presence of a user's finger over the array of light sensors. In response, the control circuitry can direct the display to illuminate a subset of the pixels, thereby illuminating the user's finger and causing reflected light from the finger to illuminate the array of light sensors for a fingerprint capture operation. The display may have display driver circuitry that facilitates the momentary illumination of the subset of pixels with uniform flash data while image data is displayed in other portions of the display.

公开(公告)号：US10467964B2

公开(公告)日：2019-11-05

申请号：US15041836

申请日：2016-02-11

Applicant: Apple Inc.

Inventor： Vasudha Gupta ,  Chin-Wei Lin ,  Yafei Bi ,  Hung Sheng Lin ,  Jean-Pierre Simon Guillou ,  Tsung-Ting Tsai ,  Sang Y. Youn

IPC: G09G3/3258 ,  G09G3/3233 ,  G09G3/3266

Abstract: An electronic device comprises a display and a controller. The controller is configured to determine a change in a refresh rate of the display from a first frequency to a second frequency. The controller is also configured to selectively generate a control signal configured to control emission of a light emitting diode of a display pixel of the display based on the first frequency.

公开(公告)号：US10438535B2

公开(公告)日：2019-10-08

申请号：US15697172

申请日：2017-09-06

Applicant: Apple Inc.

Inventor： Derek K. Shaeffer ,  Jesse A. Richmond ,  Kenichi Ueno ,  Kingsuk Brahma ,  Mohammad B. Vahid Far ,  Shingo Hatanaka ,  Yafei Bi

IPC: G09G3/3258 ,  G09G3/36 ,  G09G3/3233 ,  G09G3/20 ,  H03M1/66 ,  G09G3/3275

Abstract: A display device may include a plurality of pixels that display image data on a display, a digital-to-analog converter that outputs a voltage that corresponds to a luminance value to be depicted on a first pixel, and a circuit that amplifies the voltage and outputs an amplified voltage to the first pixel. The circuit may include a capacitor that receives the voltage via the digital-to-analog converter and an amplifier coupled to the capacitor. The amplifier generates the amplified voltage based on the voltage stored the capacitor. The circuit also include switches that couple a first terminal of the capacitor to an output of the amplifier during a first amount of time and couples a second terminal of the capacitor to the output of the amplifier after the first amount of time expires.

公开(公告)号：US20190279552A1

公开(公告)日：2019-09-12

申请号：US16335148

申请日：2017-09-20

Applicant: Apple inc.

Inventor： Derek K. Shaeffer ,  Hopil Bae ,  Yafei Bi ,  Wei H. Yao ,  Xiaofeng Wang

IPC: G09G3/20 ,  G09G3/3225 ,  G06F1/06

Abstract: A display device may include a plurality of pixels that may display image data on a display. The display device may also include a circuit that may receive pixel data including a gray level for at least one pixel of the plurality of pixels. The circuit may then receive an emission clock signal using a clock circuit based on the pixel data, such that the emission clock signal may cause the at least one pixel to receive a current for an amount of time based on the gray level. The circuit may then gate off the clock circuit after the amount of time.

公开(公告)号：US20190237001A1

公开(公告)日：2019-08-01

申请号：US16132116

申请日：2018-09-14

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Soojin Park ,  Bhadrinarayana L. Visweswaran ,  Chieh-Wei Chen ,  Anshi Liang ,  Marc Albrecht ,  Pierre-Yves Emelie ,  Sean C. Chang ,  Hyunwoo Nho ,  Mohammad Hajirostam ,  Myung-Je Cho ,  Shengkui Gao ,  Wei H. Yao ,  Yafei Bi

IPC: G09G3/20 ,  G09G3/3208

Abstract: A display device may include a processor that may receive image data, such that the image data may include gray level data and display brightness value (DBV) data for a first pixel of a display. The processor may then determine a gain compensation factor associated with the first pixel based on a correction spatial map, a brightness adaptation lookup table (LUT), the gray level data, and the DBV data. The processor may then determine an offset compensation factor associated with the first pixel based on the correction spatial map, the brightness adaptation lookup table (LUT), the gray level data, and the DBV data. The processor may generate compensated gray level data by applying the gain compensation factor and the offset compensation factor to the gray level data and transmit the compensated gray level data to pixel driving circuitry associated with the first pixel.

公开(公告)号：US10360827B2

公开(公告)日：2019-07-23

申请号：US15273470

申请日：2016-09-22

Applicant: Apple Inc.

Inventor： Yafei Bi ,  Xiaofeng Wang ,  Haifeng Li ,  Mohammad B. Vahid Far ,  Hopil Bae ,  Hung Shen Lin ,  Hyunwoo Nho ,  Wei H. Yao

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3291 ,  G09G3/00

Abstract: An electronic device includes one or more unit pixels and threshold voltage (Vth) sensing circuitry. The threshold voltage sensing circuitry senses Vth of the one or more unit pixels, by: sampling a charge of a capacitor of the one or more unit pixels, transitioning from the sampling, and reading out the threshold voltage based upon a change in the charge of the capacitor, such that an operation of the one or more unit pixels may be modified based upon the threshold voltage.

公开(公告)号：US10359885B2

公开(公告)日：2019-07-23

申请号：US15650770

申请日：2017-07-14

Applicant: Apple Inc.

Inventor： Kingsuk Brahma ,  Jie Won Ryu ,  Hopil Bae ,  Yafei Bi

IPC: G06F3/041 ,  G09G3/20 ,  G06F3/044 ,  G02F1/1333

Abstract: Touch induced flicker for variable refresh rate (VRR) displays can be reduced by adjusting one or more voltages. Synchronization of touch sensing operations after an immediate exit can introduce flicker issues into the VRR display. In some examples, the touched induced flicker can be reduced or eliminated by tuning the voltage on a common electrode (Vcom) to a tuning point that reduces a maximum error below a threshold, irrespective of refresh rate. In some examples, touch induced flicker can be reduced or eliminated by monitoring average Vcom, and when the change in average Vcom exceeds a threshold, Vcom can be adjusted to counteract the change in average Vcom due to the variable refresh rate and/or immediate exit. In some examples, touch induced flicker can be reduced or eliminated by applying a direct current (DC) pedestal to pixel gate lines during touch sensing scans.

公开(公告)号：US10096284B2

公开(公告)日：2018-10-09

申请号：US15270952

申请日：2016-09-20

Applicant: Apple Inc.

Inventor： Mohammad B. Vahid Far ,  Jesse A. Richmond ,  Yafei Bi

IPC: G09G3/3258 ,  G09G3/3266 ,  G09G3/3291

Abstract: An electronic device includes a display panel. The display panel includes a number of pixels, each of which includes a driving thin-film-transistor (TFT) and a light-emitting diode. Compensation circuitry external to the display panel applies offset data to pixel data for each pixel of the plurality of pixels before the pixel data is provided to the plurality of pixels.

公开(公告)号：US10089931B2

公开(公告)日：2018-10-02

申请号：US14990701

申请日：2016-01-07

Applicant: Apple Inc.

Inventor： Koorosh Aflatooni ,  Yafei Bi ,  Hung Sheng Lin ,  Mohammad Ali Jangda

IPC: G09G3/32 ,  G09G3/20 ,  G09G3/3258 ,  H03M1/72 ,  H03M1/76

Abstract: An electronic device that includes a display is provided. The display may have a brightness that is controlled using a series of cascaded digital-to-analog converter circuits. The display may be calibrated at a series of predetermined display brightness settings. For display brightness settings that fall between two consecutive display brightness settings in the series of predetermined display brightness settings, voltage interpolation operations may be performed to obtain the corresponding display brightness settings. Performing voltage interpolations instead of digital brightness setting interpolation helps minimize luminance jumps and unexpected color shifts when adjusting the brightness of the display.

公开(公告)号：US20180247586A1

公开(公告)日：2018-08-30

申请号：US15754107

申请日：2016-09-21

Applicant: Apple Inc.

Inventor： Mohammad B. Vahid Far ,  Yafei Bi ,  Kapil V. Sakariya ,  Hopil Bae ,  Shinya Ono ,  Thomas Charisoulis ,  Chin-Wei Lin

IPC: G09G3/3216

CPC classification number: G09G3/3216 ,  G09G3/2003 ,  G09G3/2014 ,  G09G2300/06 ,  G09G2310/0235 ,  G09G2310/0272 ,  G09G2310/0294 ,  G09G2310/0297 ,  G09G2310/066 ,  G09G2320/064

Abstract: Systems and apparatuses for hybrid micro-driver architectures having time multiplexing for driving displays are described. In one embodiment, a display (e.g., hybrid display architecture) includes a backplane and a micro-driver circuitry that is coupled to the backplane. The backplane includes circuitry (e.g., sample and hold circuitry) for sampling and holding analog data and for time multiplexing analog data. The micro-driver circuitry includes at least a capacitor of a ramp generator for generating a ramp voltage based on the analog data of the backplane and drive circuitry to cause at least one emission pulse for emitting a display element.