公开(公告)号：US20230169936A1

公开(公告)日：2023-06-01

申请号：US18160495

申请日：2023-01-27

Applicant: Apple Inc.

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

IPC: G09G5/10 ,  G06V40/13

CPC classification number: G09G5/10 ,  G06V40/1318 ,  G06V40/13 ,  G09G2320/0626 ,  G09G2360/148 ,  G09G2360/144

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：US11468809B2

公开(公告)日：2022-10-11

申请号：US14591354

申请日：2015-01-07

Applicant: Apple Inc.

Inventor： Hyunwoo Nho ,  Wei Chen ,  Wei H Yao ,  Yafei Bi

IPC: G09G3/20

Abstract: An electronic device may have a variable refresh rate display. Static content may be displayed on the display at a lower refresh rate than moving content to conserve power. The display may include an array of pixels. Display driver circuitry in the display may load image data into rows of the pixels. The display driver circuitry may have digital-to-analog converter circuitry that supplies data signals to the array. The display driver circuitry may respond to a variable refresh rate control signal that is asserted and deasserted depending on whether static or moving image content is to be displayed. The display driver circuitry may use the digital-to-analog converter circuitry to apply a time-varying scaling factor to the image data. The magnitude of the scaling factor may be adjusted during transitions between refresh rates to help suppress luminance variations that might otherwise result in flickering on the display.

公开(公告)号：US11380231B2

公开(公告)日：2022-07-05

申请号：US16644932

申请日：2018-08-31

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Hung Sheng Lin ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Injae Hwang ,  Jesse A. Richmond ,  Jie Won Ryu ,  Junhua Tan ,  Kavinaath Murugan ,  Kingsuk Brahma ,  Shengkui Gao ,  Shiping Shen ,  Sun-Il Chang ,  Myung-Je Cho ,  Yafei Bi ,  Myungjoon Choi ,  Weichuan Yao ,  Chaohao Wang

IPC: G09G3/00 ,  G09G3/3208

Abstract: Electronic devices and methods for compensating for aging or other effects in a display during a non-transmitting state (off state) of the display. Sensing may include emissive element sensing of the display and/or thin film transistor sensing of the display. Compensating for the effects may preserve or increase a uniformity of transmission of the display.

公开(公告)号：US11302264B2

公开(公告)日：2022-04-12

申请号：US16510755

申请日：2019-07-12

Applicant: Apple Inc.

Inventor： Shengkui Gao ,  Marc Joseph DeVincentis ,  Yue Jack Chu ,  Sinan Alousi ,  Mohammad Hajirostam ,  Mohammad Ali Jangda ,  Koorosh Aflatooni ,  Pierre-Yves Emelie ,  Yafei Bi ,  Paolo Sacchetto ,  Kasra Omid-Zohoor

IPC: G09G3/3291 ,  G09G3/3233 ,  G09G3/36 ,  H01L27/32

Abstract: A display device may include rows of pixels that display image data on a display and a circuit. The circuit may receive pixel data value of image data for a pixel in a first row of the rows of pixels, determine a weight factor to apply to the pixel data value based on a position of the first row with respect to the other rows, such that each row is associated with a current-resistance (IR) drop across the display. The weight factor is determined based on a respective IR drop associated with the first row. The circuit may also generate a weighted pixel data value based on the weight factor and the pixel data value and send the weighted pixel data value to a display driver circuit that renders the image data via the display.

公开(公告)号：US20210304703A1

公开(公告)日：2021-09-30

申请号：US17217827

申请日：2021-03-30

Applicant: Apple Inc.

Inventor： Yang Xu ,  Jie Won Ryu ,  Kingsuk Brahma ,  Koorosh Aflatooni ,  Marc Joseph DeVincentis ,  Mohammad Ali Jangda ,  Paolo Sacchetto ,  Shengkui Gao ,  Sinan Alousi ,  Yafei Bi ,  Chun Lu

IPC: G09G5/10

Abstract: Systems, methods, and devices are provided for providing intra-frame luminance scaling to avoid drawing excessive power while still providing exceptional brightness. An instantaneous average pixel luminance of an electronic display may be determined. The instantaneous average pixel luminance may correspond to an amount of light currently being emitted by the electronic display due to a previous image frame and a current image frame. Based at least in part on the instantaneous average pixel luminance, the luminance of a subset of pixels of image data of the current image frame may be adjusted, thereby allowing the electronic display to operate at a relatively high brightness level without exceeding a power limit.

公开(公告)号：US20210304673A1

公开(公告)日：2021-09-30

申请号：US17191009

申请日：2021-03-03

Applicant: Apple Inc.

Inventor： Shengkui Gao ,  Haifeng Li ,  Sinan Alousi ,  Marc Joseph DeVincentis ,  Yafei Bi ,  Hung Sheng Lin ,  Yi Qiao ,  Paolo Sacchetto ,  Weijun Yao ,  Pierre-Yves Emelie ,  Maofeng Yang ,  Yue Jack Chu

IPC: G09G3/3233

Abstract: A system may include an electronic display panel having pixels, where each pixel may emit light based on a respective programming signal. The system may include a memory storing a map. The processing circuitry may determine a function for each pixel from the map. The processing circuitry may determine a respective control signal based on the function and a target brightness level for each pixel to generate multiple control signals, where the respective control signal is used to generate the respective programing signal for each pixel. The processing circuitry may determine a scaling factor based at least in part on the first map and may scale at least a subset of the multiple control signals based at least in part on the scaling factor.

公开(公告)号：US10559238B2

公开(公告)日：2020-02-11

申请号：US15698262

申请日：2017-09-07

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Shengkui Gao ,  Hyunwoo Nho ,  Chin-Wei Lin ,  Mohammad B Vahid Far ,  Jie Won Ryu ,  Kingsuk Brahma ,  Junhua Tan ,  Sun-II Chang ,  Shinya Ono ,  Jesse A Richmond ,  Yafei Bi ,  Derek K. Shaeffer

IPC: G09G3/00

Abstract: Systems and methods are provided for differential sensing (DS), difference-differential sensing (DDS), correlated double sampling (CDS), and/or programmable capacitor matching to reduce display panel sensing noise. An electronic device may include one or more processors and an electronic display. The one or more processors may generate image data and adjust the image data based at least in part on display sensing feedback. The electronic display may employ sensing circuitry that obtains the display sensing feedback at least in part by applying test data to a pixel of a column of an active area of the display and differentially senses an electrical value of the pixel in comparison to a reference signal from a different column. This reference signal may provide a common mode noise reference, which is removed by the differential sensing and thereby enhances a quality of the sensed electrical value of the pixel.

公开(公告)号：US10395589B1

公开(公告)日：2019-08-27

申请号：US15247678

申请日：2016-08-25

Applicant: Apple Inc.

Inventor： Mohammad B. Vahid Far ,  Wei H. Yao ,  Yafei Bi

IPC: G09G3/3233 ,  G09G3/3283

Abstract: Methods, systems, and apparatuses for controlling an emission of the light emitting devices are described herein. The light emitting devices may be light emitting diode (LED) devices including μLED devices or organic LED (OLED) devices. Emission control of the LED may be performed using a micro-scale driving circuit (e.g., μDriver) containing drive transistors for constant current driving of the light emitting devices. One embodiment provides for a display driver hardware circuit comprising a thin film transistor (TFT) backplane and an integrated circuit to switch and drive a plurality of LED devices, the integrated circuit including emission logic to generate an emission pulse to an LED device, the emission logic including comparator logic having a relaxed comparator offset, the comparator logic to compare a voltage from a storage capacitor on the TFT backplane to a reference voltage to control a length of the emission pulse provided by the emission logic.

公开(公告)号：US20190086992A1

公开(公告)日：2019-03-21

申请号：US16028199

申请日：2018-07-05

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Hyunwoo Nho ,  Hyunsoo Kim ,  Shengkui Gao ,  Chun Lu ,  Sinan Alousi ,  Chin-Wei Lin ,  Jesse Aaron Richmond ,  Yafei Bi ,  Injae Hwang ,  Haifeng Li ,  Mohammad Hajirostam

IPC: G06F1/32 ,  G09G3/3258

Abstract: An electronic display includes an active area having an array of pixels. The electronic display also includes multiple data power rails coupled to the active area that supply power to the array of pixels. The electronic display further includes data driving circuitry coupled to the multiple data power rails that drive the array of pixels. The electronic display also includes a controller coupled to the data driving circuitry having a processor. The processor causes the array of pixels to emit light based on a display brightness value. The processor also causes a pixel of the array of pixels to emit light at a brightness of gray level 0 by dynamically adjusting a data power rail of the multiple data power rails.

公开(公告)号：US10019968B2

公开(公告)日：2018-07-10

申请号：US15271085

申请日：2016-09-20

Applicant: Apple Inc.

Inventor： Yafei Bi ,  Arthur L. Spence ,  Vanessa C. Heppolette ,  Eran Tamari ,  Josh P. DeCesare

IPC: G09G5/12 ,  G09G5/18 ,  G09G5/395 ,  G09G5/39 ,  G09G5/00 ,  G09G5/393

CPC classification number: G09G5/39 ,  G09G5/001 ,  G09G5/12 ,  G09G5/18 ,  G09G5/393 ,  G09G5/395 ,  G09G2310/04 ,  G09G2340/0435 ,  G09G2360/18

Abstract: Systems and methods for synchronizing a video source and display circuitry using a dynamic tearing effect (TE) signal are provided. In one embodiment, an electronic display device includes: variable refresh rate circuitry that, when no new frame data is provided to the electronic display device, extends a vertical blanking period and reduces a refresh rate of the electronic display device. A tearing effect signal is generated, which is selectively set to a first logical level at a first period of time and a second logical level at a second period of time. The tearing effect signal is provided to the host electronic device that provides frame data to the electronic display device and upon receipt of new frame data, an un-extended vertical blanking period is returned to and the frame data at the next frame boundary is displayed.