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.

公开(公告)号：US20180083648A1

公开(公告)日：2018-03-22

申请号：US15697233

申请日：2017-09-06

Applicant: Apple Inc.

Inventor： Baris Cagdaser ,  Derek K. Shaeffer ,  Hopil Bae ,  Jesse Aaron Richmond ,  Jie Won Ryu ,  Kingsuk Brahma ,  Mohammad B. Vahid Far ,  Shingo Hatanaka ,  Yafei Bi ,  Yuichi Okuda

IPC: H03M1/78 ,  H03M1/76 ,  H03M1/74 ,  H03M1/68

CPC classification number: H03M1/785 ,  G09G2320/0276 ,  H03M1/682 ,  H03M1/747 ,  H03M1/765

Abstract: A device includes a resistor string that includes a plurality resistors with voltage taps disposed therebetween. The device may select one particular voltage tap of the plurality of voltage taps based on received gray level data for a pixel of a display. The device also includes a first amplifier that may be coupled to a first terminal end of the resistor string. The device additionally includes a second amplifier that may be coupled to a second terminal end of the resistor string, wherein the plurality of voltage taps may each supply a tap voltage derived from a voltage between the first amplifier and the second amplifier, wherein any tap amplifier of the device coupled to a voltage tap of the plurality of voltage taps provides a reference voltage thereto.

公开(公告)号：US09773446B2

公开(公告)日：2017-09-26

申请号：US14106384

申请日：2013-12-13

Applicant: APPLE INC.

Inventor： Wei H. Yao ,  Yafei Bi ,  Ahmad Al-Dahle

IPC: G09G5/02 ,  G09G3/3208 ,  G09G5/00

CPC classification number: G09G3/3208 ,  G09G5/003 ,  G09G2300/0861 ,  G09G2360/144

Abstract: An electronic display includes a display panel, which includes an array of pixels and a driver configured to activate and deactivate the emission of light from each of the pixels in the array. The electronic display also includes a panel driver configured to generate and transmit an emission interrupt signal to the driver, wherein the emission interrupt signal causes the driver to deactivate the emission of light from all pixels in the array for a set period of time prior to a refresh of a line of pixels in the array.

公开(公告)号：US09747840B2

公开(公告)日：2017-08-29

申请号：US15167549

申请日：2016-05-27

Applicant: Apple Inc.

Inventor： Yafei Bi ,  Wei H. Yao

IPC: G09G3/32 ,  G09G3/3258 ,  G09G3/3275 ,  G09G3/3233

CPC classification number: G09G3/3258 ,  G09G3/3233 ,  G09G3/3275 ,  G09G2300/0828 ,  G09G2300/0861 ,  G09G2310/027 ,  G09G2320/029 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2320/0606 ,  G09G2320/0626 ,  G09G2320/0673 ,  G09G2320/0693 ,  G09G2330/021 ,  G09G2330/12 ,  G09G2354/00 ,  G09G2360/144 ,  G09G2360/16

Abstract: A display may have an array of display pixels to display images. Digital display data may be received by a digital-to-analog converter. The digital-to-analog converter can convert the digital display data to analog display data for the display pixels. The magnitudes of the analog display data signals that the digital-to-analog converter provides to the display pixels can be controlled by a control signal such as a reference voltage received by the digital-to-analog converter. A brightness controller may have multiple peak luminance control profiles. A brightness setting may be processed by a look-up table to produce information identifying a selected one of the peak luminance control profiles. The brightness controller may use the selected peak luminance control profile and average frame luminance for the digital display data to produce the reference voltage that controls the digital-to-analog controller.

公开(公告)号：US20170053599A1

公开(公告)日：2017-02-23

申请号：US14975389

申请日：2015-12-18

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Vasudha Gupta ,  Yafei Bi

IPC: G09G3/3283 ,  G09G3/3258 ,  G09G3/20 ,  G09G3/3266

CPC classification number: G09G3/3283 ,  G09G3/2048 ,  G09G3/3225 ,  G09G3/3233 ,  G09G3/3258 ,  G09G3/3266 ,  G09G3/3275 ,  G09G3/3291 ,  G09G3/3614 ,  G09G3/3688 ,  G09G2300/0819 ,  G09G2300/0876 ,  G09G2310/0254 ,  G09G2310/0291 ,  G09G2320/0204 ,  G09G2320/0233 ,  G09G2320/0247 ,  H03F2200/375

Abstract: Systems and method for improving display quality of an electronic display. In one embodiment the electronic display includes a first display pixel that facilitates displaying a first image frame using first amplified image data and facilitates displaying a second image frame using second amplified image data; a second display pixel that facilitates displaying the first image frame using third amplified image data; a first amplifier that operates in a first operational mode to generate the first amplified image data based on image data corresponding with the first image frame and operates in a second operational mode to generate the second amplified image data based on image data corresponding with the second image frame; and a second amplifier that operates in the second operational mode to generate the third amplified image data based on the image data corresponding with the first image frame.

Abstract translation: 用于提高电子显示器的显示质量的系统和方法。 在一个实施例中，电子显示器包括第一显示像素，其便于使用第一放大图像数据显示第一图像帧，并且有助于使用第二放大图像数据显示第二图像帧; 使用第三放大图像数据便于显示第一图像帧的第二显示像素; 第一放大器，其以第一操作模式操作，以基于与第一图像帧相对应的图像数据生成第一放大图像数据，并且以第二操作模式操作，以基于与第二图像对应的图像数据生成第二放大图像数据 帧; 以及第二放大器，其以第二操作模式操作，以基于与第一图像帧对应的图像数据生成第三放大图像数据。

公开(公告)号：US20160275865A1

公开(公告)日：2016-09-22

申请号：US15167549

申请日：2016-05-27

Applicant: Apple Inc.

Inventor： Yafei Bi ,  Wei H. Yao

IPC: G09G3/3258

CPC classification number: G09G3/3258 ,  G09G3/3233 ,  G09G3/3275 ,  G09G2300/0828 ,  G09G2300/0861 ,  G09G2310/027 ,  G09G2320/029 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2320/0606 ,  G09G2320/0626 ,  G09G2320/0673 ,  G09G2320/0693 ,  G09G2330/021 ,  G09G2330/12 ,  G09G2354/00 ,  G09G2360/144 ,  G09G2360/16

Abstract: A display may have an array of display pixels to display images. Digital display data may be received by a digital-to-analog converter. The digital-to-analog converter can convert the digital display data to analog display data for the display pixels. The magnitudes of the analog display data signals that the digital-to-analog converter provides to the display pixels can be controlled by a control signal such as a reference voltage received by the digital-to-analog converter. A brightness controller may have multiple peak luminance control profiles. A brightness setting may be processed by a look-up table to produce information identifying a selected one of the peak luminance control profiles. The brightness controller may use the selected peak luminance control profile and average frame luminance for the digital display data to produce the reference voltage that controls the digital-to-analog controller.