Apple Inc.

Other

Appe Inc.

Hopil Bae

Mahdi Farrokh Baroughi

Wei Hsin Yao

Henry C Jen

Xiaofeng Wang

Xiang Lu

Hasan Akyol

Derek Keith Shaeffer

Yafei Bi

Tore Nauta

Mohammad Bagher Vahid Far

Kingsuk Brahma

Ahmad Al-Dahle

Shih Chang Chang

David A Stronks

Kapil Vinod Sakariya

Zhibing Ge

Shingo Hatanaka

Chaohao Wang

Cheng Kai Chen

Ming Xu

Paolo Sacchetto

John T Wetherell

Shawn Robert Gettemy

Sunggu Kang

Hyunwoo Nho

Cheng-Ho Yu

Sang Young Youn

Wei Chen

Marduke Yousefpor

Ion Bita

Jie Won Ryu

Yingxuan Li

Sheng Zhang

Seung Bum Rim

Weijun Yao

James E Pedder

Ting-Kuo Chang

Chun-Yao Huang

Jun Li

Manu Agarwal

Abbas Jamshidi-Roudbari

Xin Zhao

Steven Porter Hotelling

Hung Sheng Lin

Hjalmar Edzer Ayco Huitema

Shinya Ono

Warren S Rieutort-Louis

Baris Cagdaser

Marc Joseph DeVincentis

Tien-Chien Kuo

Erno H Klaassen

Steven E Molesa

David W Lum

Xiaokai Li

Yongman Lee

Bo Yang

Mitchell Herman Kline

Yingkan Lin

Yunhui Hou

Ivan Knez

Chengrui Le

Kanghoon Jeon

Yun Yu Wang

Xia Li

Christoph Horst Krah

Paul Stephen Drzaic

Chin-Wei Lin

Gabriel G Marcu

Abbas Jamshidi Roudbari

Thomas James Wilson

Marc Albrecht

Mahesh B Chappalli

Sandro Hermann Pintz

Jiaying Wu

Brian Jonathan Conner

Shih-Chyuan Fan Jiang

Shafiq M Jamal

Jesse Aaron Richmond

Enkhamgalan Dorjgotov

ByoungSuk Kim

Wonjae Choi

Yi Huang

Ulrich Tobias Barnhoefer

Zhen Zhang

Lu Zhang

Injae Hwang

Mohammad Ali Jangda

Christian M Sauer

Fenghua Zheng

Yang Xu

Izhar Zahoor Ahmed

Ilie Garbacea

Chuang Qian

Yue Jack Chu

Giovanni Carbone

Keitaro Yamashita

Taif Ahmed Syed

Yung-Chin Chen

Majid Gharghi

A control circuit adjusts a value of a source supply voltage VSSEL provided to a display area in an electronic display. The control circuit also adjusts a voltage Vreset applied to the display area to cause the display area to emit light more uniformly under various ambient conditions (e.g., temperature) surrounding the display area. Dynamically changing Vreset is employed to make anode charging dynamics independent of temperature. The control circuit adjusts the source supply voltage VSSEL and the voltage Vreset together to compensate display pixel hysteresis effects and display artifacts caused by temperature changes and brightness changes of the display area and collectively produce images. Dynamically tuning the Vreset and the VSSEL voltages also saves power and improves gray level accuracy for the electronic display.

Dynamic Vreset and VSSEL tuning for better low gray accuracy and power saving

Electronic devices, displays, and methods are provided for operating an electronic display in coexistence with sensors that could be adversely impacted by the operation of the electronic display. An electronic device may include an electronic display and a sensor. The electronic display may display image content by light emission during an emission period and periodically enter a quiet period in which the light emission of the electronic display is turned off. The sensor may perform sensing operations during the quiet period without interference from the operation of the electronic display.

Electronic display timing to mitigate image artifacts or manage sensor coexistence

A pulse width modulation and amplitude modulation driving system for a display panel, including related circuits and methods of operation, are described. In an embodiment, a display panel includes a thin film transistor layer comprising a plurality of subpixel circuits. Each subpixel circuit may include a drive transistor, a comparator, and a switch. A plurality of light emitting diodes (LEDs), such as micro-LEDs, may be connected to the plurality of subpixel circuits. Each subpixel circuit can control an LED based on a current amplitude controlled by the drive transistor and a current pulse width controlled by the comparator and the switch. Other aspects are also described and claimed.

Pulse width modulation and amplitude modulation driving system for display panels

An electronic device display may have pixels formed from crystalline semiconductor light-emitting diode dies, organic light-emitting diodes, or other pixel structures. The pixels may be formed on a display panel substrate. A display panel may extend continuously across the display or multiple display panels may be tiled in two dimensions to cover a larger display area. Interconnect substrates may have outwardly facing contacts that are electrically shorted to corresponding inwardly facing contacts such as inwardly facing metal pillars associated with the display panels. The interconnect substrates may be supported by glass layers. Integrated circuits may be embedded in the display panels and/or in the interconnect substrates. A display may have an active area with pixels that includes non-spline pixels in a non-spline display portion located above a straight edge of the display and spline pixel in a spline display portion located above a curved edge of the display.

Electronic devices with borderless displays

Display panel redundancy schemes and methods of operation are described. In an embodiment, and display panel includes an array of drivers (e.g. microdrivers), each of which including multiple portions to independently receive control and pixel bits. In an embodiment, each driver portion is to control a group of redundant emission elements.

Display panel redundancy schemes

An electronic device uses a leader synchronize signal generator to synchronize clock signal generators used by multiple components in the electronic device to a common time-base. A processor core complex of the electronic device sends per-frame configuration to a timing controller for frames to be displayed on an electronic display before a corresponding frame begins.

Two-way communication to allow consistent per-frame configuration update

To reduce image artifacts and non-uniformity associated with a display pixel of an electronic display, processing circuity may adjust a luminance value corresponding to a display pixel according to a per-pixel gain mask, a per-pixel anode mask, or both. To further correct for the non-uniformity, the processing circuitry may convert the luminance value to a digital code based on a curve associated with an anode on which the display pixel is located.

Display pixel non-uniformity compensation

To reduce image artifacts induced by temperature variations associated with display pixels of an electronic display, processing circuitry may process temperature sensing data to obtain an average temperature and a temperature distribution of the electronic display. Based on the processed temperature data, the processing circuit may adjust a reference voltage applied to the display pixels to compensate for the average temperate. To further correct for the image artifacts, the processing circuitry may transform image data to luminance domain. Based on the processed temperature data, the processing may adjust luminance vales of the image data to compensate for the temperature distribution.

Two-dimensional temperature sensing and compensation

In accordance with embodiments of the present disclosure, a device may include a pulsed emission electronic display having multiple display pixels in order to display an image frame. The display may pulse one or more display pixels of over a plurality of sub-frames within the image frame based on display image data. The device may also include image processing circuitry to generate the display image data based on source image data indicative of an image to be displayed during the image frame. Additionally, the image processing circuitry may dither an order of the plurality of sub-frames.

Spatiotemporal dither for pulsed digital display systems and methods

Display panel redundancy schemes and redundancy building blocks are described. In an embodiment, pixel driver chips are connected to both primary and redundant strings of LEDs within a local passive matrix, and driver terminal switches within the pixel driver chip are used to select either the primary or redundant strings of LEDs.

Pixel driver redundancy schemes

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.

Local passive matrix display

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.

Row driver configuration

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.

Hybrid architecture for zero border display

An electronic device may display image content via an electronic display by controlling light emission from display pixels of the electronic display. A processor of the electronic device may receive image data destined for a defective display pixel (e.g., dim pixel, dead pixel). The processor may convert a gray level of the image data into a luminance domain to generate a target luminance that would have been emitted by the defective display pixel had the display pixel not been defective. After selecting a compensation mask, the processor may distribute the target luminance of the defective display pixels to nearby non-defective pixels of the electronic display to conceal the presence of the defective display pixel.

Systems and methods for point defect compensation

Growing community of inventors

Sunnyvale, CA, United States of America

Hopil Bae