公开(公告)号：US09952264B2

公开(公告)日：2018-04-24

申请号：US14993702

申请日：2016-01-12

Applicant: Apple Inc.

Inventor： Kingsuk Brahma ,  David A. Stronks ,  Hopil Bae ,  Wei H. Yao

IPC: G09G3/36 ,  G01R27/20 ,  G09G3/20 ,  G09G3/00

CPC classification number: G01R27/205 ,  G09G3/006 ,  G09G3/2092 ,  G09G3/2096 ,  G09G3/3607 ,  G09G3/3696 ,  G09G2300/0426 ,  G09G2310/08 ,  G09G2320/0223

Abstract: A display may have a substrate layer to which a display driver integrated circuit and flexible printed circuit are bonded. The display driver integrated circuit may be provided with switches and control circuitry for controlling the operation of the switches during bond resistance measurements. Test equipment may apply currents to pads in the display driver integrated circuit through contacts in the flexible printed circuit while controlling the switching circuitry. Based on these measurements and the measurement of trace resistances in a dummy flexible printed circuit, the test equipment may determine bond resistances for bonds between the display driver integrated circuit and the display substrate and between the flexible printed circuit and the display substrate. Displays may have master and slave display driver integrated circuits that share coarse reference voltages produced by the master from raw power supply voltages.

公开(公告)号：US20180082638A1

公开(公告)日：2018-03-22

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 ,  G09G3/20 ,  G09G3/3233

CPC classification number: G09G3/3258 ,  G09G3/2011 ,  G09G3/3233 ,  G09G3/3275 ,  G09G3/3688 ,  G09G2310/027 ,  G09G2310/0291 ,  G09G2310/0294 ,  G09G2310/0297 ,  G09G2310/08 ,  G09G2320/0276 ,  G09G2330/021 ,  G09G2330/028 ,  G09G2340/0435

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：US20180075798A1

公开(公告)日：2018-03-15

申请号：US15661995

申请日：2017-07-27

Applicant: Apple Inc.

Inventor： Hyunwoo Nho ,  Hung Sheng Lin ,  Jie Won Ryu ,  Junhua Tan ,  Sun-Il Chang ,  Shengkui Gao ,  Rui Zhang ,  Injae Hwang ,  Kingsuk Brahma ,  Jesse Aaron Richmond ,  Shiping Shen ,  Hyunsoo Kim ,  Sebastian Knitter ,  Lu Zhang ,  Nicolas P. Bonnier ,  Chih-Wei Yeh ,  Chaohao Wang ,  Paolo Sacchetto ,  Chin-Wei Lin ,  Mohammad B Vahid Far ,  Shinya Ono ,  Yafei Bi ,  Majid Gharghi ,  Kavinaath Murugan ,  Yun Wang ,  Derek K. Shaeffer ,  Baris Cagdaser ,  Tobias Jung ,  Marc Albrecht ,  Myung-Je Cho

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G3/3233 ,  G09G2320/0233 ,  G09G2320/0285 ,  G09G2320/029 ,  G09G2320/0295 ,  G09G2320/041 ,  G09G2320/043 ,  G09G2320/045 ,  G09G2320/0626

Abstract: A mobile electronic device includes a display having a pixel and processing circuitry separate from but communicatively coupled to the display. The processing circuitry prepares image data to send to the pixel and adjusts the image data to compensate for operational variations of the display based on feedback received from the display that describes a present operational behavior of the pixel. The mobile electronic device also includes additional electronic components that affect the present operational behavior of the pixel depending on present operational behavior of the additional electronic components.

公开(公告)号：US20170351368A1

公开(公告)日：2017-12-07

申请号：US15669869

申请日：2017-08-04

Applicant: Apple Inc.

Inventor： Manu Agarwal ,  Erno H. Klaassen ,  Hopil Bae ,  Kingsuk Brahma

IPC: G06F3/041 ,  G02B5/20

CPC classification number: G06F3/0412 ,  G01R31/001 ,  G02B5/201 ,  G02F1/13306 ,  G02F1/13338 ,  G02F2001/133334 ,  G06F3/00 ,  G06F3/0414 ,  G06F3/0418

Abstract: A sensing device can be included in a display of an electronic device. Various techniques can be used to reduce display noise in the signals output from the sensing device. The techniques include the use of a filtering layer in a display stack, the use of a non-uniform sampling scheme, averaging together noise signal samples sampled over multiple display frames, and inverting a phase of the sampling of the noise signal over multiple display frames.

公开(公告)号：US20160203777A1

公开(公告)日：2016-07-14

申请号：US14993702

申请日：2016-01-12

Applicant: Apple Inc.

Inventor： Kingsuk Brahma ,  David A. Stronks ,  Hopil Bae ,  Wei H. Yao

IPC: G09G3/36

CPC classification number: G01R27/205 ,  G09G3/006 ,  G09G3/2092 ,  G09G3/2096 ,  G09G3/3607 ,  G09G3/3696 ,  G09G2300/0426 ,  G09G2310/08 ,  G09G2320/0223

Abstract: A display may have a substrate layer to which a display driver integrated circuit and flexible printed circuit are bonded. The display driver integrated circuit may be provided with switches and control circuitry for controlling the operation of the switches during bond resistance measurements. Test equipment may apply currents to pads in the display driver integrated circuit through contacts in the flexible printed circuit while controlling the switching circuitry. Based on these measurements and the measurement of trace resistances in a dummy flexible printed circuit, the test equipment may determine bond resistances for bonds between the display driver integrated circuit and the display substrate and between the flexible printed circuit and the display substrate. Displays may have master and slave display driver integrated circuits that share coarse reference voltages produced by the master from raw power supply voltages.

Abstract translation: 显示器可以具有显示驱动器集成电路和柔性印刷电路结合到其上的基板层。 显示驱动器集成电路可以设置有用于在接合电阻测量期间控制开关的操作的开关和控制电路。 测试设备可以通过柔性印刷电路中的触点在显示驱动器集成电路中的焊盘上施加电流，同时控制开关电路。 基于这些测量和虚拟柔性印刷电路中的迹线电阻的测量，测试设备可以确定显示驱动器集成电路和显示器基板之间以及柔性印刷电路和显示器基板之间的结合的结合电阻。 显示器可以具有主从显示驱动器集成电路，其从原始电源电压共享由主机产生的粗参考电压。

公开(公告)号：US20150332638A1

公开(公告)日：2015-11-19

申请号：US14276146

申请日：2014-05-13

Applicant: APPLE INC.

Inventor： Yingxuan Li ,  Weijun Yao ,  Wei H. Yao ,  Kingsuk Brahma ,  Hyunwoo Nho

IPC: G09G3/36

CPC classification number: G09G3/3688 ,  G09G3/3648 ,  G09G3/3655 ,  G09G3/3696 ,  G09G2300/0426 ,  G09G2310/027 ,  G09G2310/0291 ,  G09G2320/0233 ,  G09G2320/0276 ,  G09G2320/029

Abstract: Devices and methods for reducing or eliminating image artifacts are provided. By way of example, a display panel includes a pixels including pixel electrodes configured to receive an image data signal, and common electrodes (VCOMs) configured to receive a common voltage signal. The display panel includes a source driver, which includes a first digital to analog converter (DAC) configured to generate a gamma voltage signal to provide a first adjustment to the image data signal, and a second DAC configured to generate an error correction voltage signal to provide a second adjustment to the image data signal. The second adjustment is configured to adjust the image data signal to compensate for an operational characteristic difference between row pixels and column pixels of the display panel. The source driver includes an output buffer to supply the image data signal to the pixel electrodes.

Abstract translation: 提供了用于减少或消除图像伪像的设备和方法。 作为示例，显示面板包括被配置为接收图像数据信号的像素电极的像素和被配置为接收公共电压信号的公共电极（VCOM）。 显示面板包括源驱动器，其包括被配置为产生伽马电压信号以对图像数据信号提供第一调整的第一数模转换器（DAC）和被配置为产生纠错电压信号的第二DAC 对图像数据信号提供第二调整。 第二调整被配置为调整图像数据信号以补偿显示面板的行像素和列像素之间的操作特性差异。 源极驱动器包括用于将图像数据信号提供给像素电极的输出缓冲器。