公开(公告)号：US11645976B2

公开(公告)日：2023-05-09

申请号：US17648074

申请日：2022-01-14

Applicant: Apple Inc.

Inventor： Derek K. Shaeffer ,  Mahdi Farrokh Baroughi ,  Xiaofeng Wang ,  Sam S. Li ,  John T. Wetherell ,  Henry C. Jen ,  Xiang Lu ,  Hasan Akyol ,  Hopil Bae ,  Xiang Fang ,  Hjalmar Edzer Ayco Huitema ,  Tore Nauta

IPC: G09G3/3216 ,  H01L27/32 ,  G09G3/20 ,  H05B45/20

CPC classification number: G09G3/3216 ,  G09G3/2003 ,  H01L27/3281 ,  H05B45/20 ,  G09G2310/0243 ,  G09G2310/0264

Abstract: Local passive matrix displays and methods of operation are described. In an embodiment, the display includes a pixel driver chip coupled with a matrix of rows and columns of LEDs. The pixel driver chips may be arranged in rows across the display with separate portions to operate separate matrices of LEDs.

公开(公告)号：US11568787B2

公开(公告)日：2023-01-31

申请号：US17465056

申请日：2021-09-02

Applicant: Apple Inc.

Inventor： Kapil V. Sakariya ,  Tore Nauta ,  Hopil Bae ,  Henry C. Jen

IPC: G09G3/32 ,  G09G3/20

Abstract: Methods and apparatuses relating to controlling an emission of a display panel. In one embodiment, a display driver hardware circuit includes row selection logic to select a number of rows in an emission group of a display panel, wherein the number of rows is adjustable from a single row to a full panel of the display panel, column selection logic to select a number of columns in the emission group of the display panel, wherein the number of columns is adjustable from a single column to the full panel of the display panel, and emission logic to select a number of pulses per data frame to be displayed, wherein the number of pulses per data frame is adjustable from one to a plurality and a pulse length is adjustable from a continuous duty cycle to a non-continuous duty cycle.

公开(公告)号：US11532259B2

公开(公告)日：2022-12-20

申请号：US15764257

申请日：2016-09-20

Applicant: Apple Inc.

Inventor： Mohammad B Vahid Far ,  Hopil Bae ,  Mahdi Farrokh Baroughi ,  Xiaofeng Wang

IPC: G09G3/00 ,  G09G3/3225 ,  G09G3/20 ,  G09G3/3266 ,  G09G3/3208 ,  G11C19/28

Abstract: An electronic display includes an active area including multiple pixels. The electronic display also includes a first row driver set including a first column of row drivers and a second column of row drivers. A first active row driver in the first column of row drivers drives a first portion of the multiple pixels, and a first spare row driver in the second column of row drivers is in an inactive state. The electronic display also includes a second row driver set including a third column of row drivers and a fourth column of row drivers. A third active row driver in the third column of row drivers drives a second portion of the multiple pixels, and a second spare row driver in the fourth column of row drivers is inactive.

公开(公告)号：US20220246082A1

公开(公告)日：2022-08-04

申请号：US17727197

申请日：2022-04-22

Applicant: Apple Inc.

Inventor： Xiang Lu ,  Mahdi Farrokh Baroughi ,  Xiaofeng Wang ,  Derek K. Shaeffer ,  Henry C. Jen ,  Hopil Bae

IPC: G09G3/20 ,  G09G3/3216 ,  G09G3/3275

Abstract: Hybrid architectures and method methods of operating a display panel are described. In an embodiment, row driver and pixel driver functions are combined in a group of backbone hybrid pixel driver chips, wherein global signal lines are distributed to the backbone hybrid pixel driver chips, where the global signals are manipulated and distributed to a row of pixel driver chips.

公开(公告)号：US20220101772A1

公开(公告)日：2022-03-31

申请号：US17376131

申请日：2021-07-14

Applicant: Apple Inc.

Inventor： John T. Wetherell ,  Mahdi Farrokh Baroughi ,  Jaeyoung Kang ,  Shingo Hatanaka ,  Hasan Akyol ,  Hopil Bae

IPC: G09G3/20

Abstract: An electronic device may include an electronic display panel having multiple display pixels for displaying an image based on analog voltage signals. The electronic device may also include interpolation circuitry to generate the analog voltage signals based on digital image data corresponding to the image. The interpolation circuitry may also receive analog reference voltages and interpolate between sets of the analog reference voltages to generate intermediate voltages, which may be a part of the analog voltage signals. Interpolating between the sets analog reference voltages may include performing a first level interpolation of a first set of the analog reference voltages to generate a first intermediate voltage and performing a second level interpolation of a second set of the analog reference voltages to generate a second intermediate voltage, wherein the first level interpolation is different from the second level interpolation.

公开(公告)号：US11138950B1

公开(公告)日：2021-10-05

申请号：US16688898

申请日：2019-11-19

Applicant: Apple Inc.

Inventor： Tien-Chien Kuo ,  Ivan Knez ,  Bilin Wang ,  Hopil Bae ,  Kanghoon Jeon ,  Chun-Yao Huang ,  Denis Michel Darmon

IPC: G09G5/00

Abstract: Efficiently transmitting image data to an electronic display may be provided by skipping regions of the electronic display that display a default value. The electronic display may include a number of pixels, a row driver, and a data driver. The row driver may activate a first subset of the pixels for programming. The data driver may program a default pixel value to respective pixels of the first subset of the pixels for which image data has not been received and may program image data to respective pixels of the first subset of the pixels for which image data has been received.

公开(公告)号：US11138918B2

公开(公告)日：2021-10-05

申请号：US17088903

申请日：2020-11-04

Applicant: Apple Inc.

Inventor： Kapil V. Sakariya ,  Tore Nauta ,  Hopil Bae ,  Henry C. Jen

IPC: G09G3/32 ,  G09G3/20

Abstract: Methods and apparatuses relating to controlling an emission of a display panel. In one embodiment, a display driver hardware circuit includes row selection logic to select a number of rows in an emission group of a display panel, wherein the number of rows is adjustable from a single row to a full panel of the display panel, column selection logic to select a number of columns in the emission group of the display panel, wherein the number of columns is adjustable from a single column to the full panel of the display panel, and emission logic to select a number of pulses per data frame to be displayed, wherein the number of pulses per data frame is adjustable from one to a plurality and a pulse length is adjustable from a continuous duty cycle to a non-continuous duty cycle.

公开(公告)号：US20210272511A1

公开(公告)日：2021-09-02

申请号：US17172929

申请日：2021-02-10

Applicant: Apple Inc.

Inventor： Seung Bum Rim ,  Hopil Bae

IPC: G09G3/32 ,  G09G3/20

Abstract: A display device has a timing controller and a microdriver. The timing controller receives multiple bit sequences of image data for multiple pixels of the display device. The timing controller also reorders the multiple bit sequences based on a significant bit position within the multiple bit sequences. Each of the multiple bit sequences corresponds to a respective individual pixel of the multiple pixels. The microdriver receives the reordered multiple bit sequences and drives the multiple pixels using the reordered plurality of bit sequences.

公开(公告)号：US10930201B1

公开(公告)日：2021-02-23

申请号：US15910906

申请日：2018-03-02

Applicant: Apple Inc.

Inventor： Mahdi Farrokh Baroughi ,  Bo Yang ,  Xiang Lu ,  Hopil Bae

IPC: G09G3/32 ,  G09G3/00

Abstract: Methods and systems for testing a display having an array of microdrivers arranged in multiple of rows and columns including setting a testing mode of a microdriver of the array of microdrivers using multiple pins of the microdriver that are used in scanning or operation modes of the microdriver. The microdriver is configured to light one or more connected micro light emitting diode pixels coupled to the microdriver during the testing mode. Testing also includes operating the microdriver in the testing mode and determining functionality of the one or more connected micro light emitting diode pixels or the microdriver based on the testing mode.

公开(公告)号：US10891882B1

公开(公告)日：2021-01-12

申请号：US15910886

申请日：2018-03-02

Applicant: Apple Inc.

Inventor： Mahdi Farrokh Baroughi ,  Mohammad B. Vahid Far ,  Xiang Lu ,  Bo Yang ,  Derek K. Shaeffer ,  Henry C. Jen ,  Hopil Bae

IPC: G09G3/00 ,  G09G3/36

Abstract: The present techniques are capable of identifying and pinpointing defective microdrivers and/or row/column drivers either before or after any μLEDs have been placed on the display. Using the architectures described herein, test data may be delivered in a parallel fashion to the drivers from support circuitry, such as a timing controller and/or a main board, and outputs based on the test data may be similarly delivered back to the support circuitry do determine which drivers are defective. This yields access to the output of every microdriver and row drier, thus enabling the identification of specific defective elements.