Apple Inc.

Other

Mahdi Farrokh Baroughi

Hopil Bae

Henry C Jen

Xiang Lu

Derek Keith Shaeffer

Hasan Akyol

Tore Nauta

Xiaofeng Wang

Shingo Hatanaka

Wei Hsin Yao

Paolo Sacchetto

Kapil Vinod Sakariya

Sunggu Kang

Saif Choudhary

Chaohao Wang

Mohammad Bagher Vahid Far

Stanley B Wang

Sunmin Jang

Ion Bita

Sheng Zhang

James E Pedder

John T Wetherell

Haitao Li

Young Don Bae

Hari P Paudel

Seung Bum Rim

Steven E Molesa

Xiang Fang

Ce Zhang

Hjalmar Edzer Ayco Huitema

Sandeep Chalasani

Sam S Li

Xin Zhao

Xia Li

Paul Stephen Drzaic

Wei Chen

Warren S Rieutort-Louis

Marc Joseph DeVincentis

Bo Yang

Yunhui Hou

Chih-Wei Yeh

Tiffany T Moy

Francois R Jacob

Pablo Moreno Galbis

Zuoqian Wang

Yaser Azizi

Yongjie Jiang

Jonathan P Mar

Ian D Tracy

Jui-Chih Liao

Hoon Sik Kim

Abbas Jamshidi Roudbari

Mahesh B Chappalli

Weijun Yao

Jun Li

Hao Chen

Enkhamgalan Dorjgotov

ByoungSuk Kim

David W Lum

Mario Martinis

Zhen Zhang

Yifan Zhang

James G Horiuchi

Jiayi Jin

Izhar Zahoor Ahmed

Chuang Qian

Chengrui Le

Giovanni Carbone

Yung-Chin Chen

Majid Gharghi

Jaein Choi

Patrick B Bennett

Michael Slootsky

Paul S Drzaic

Adam Adjiwibawa

Yong Sun

Anshi Liang

Nikhil Acharya

Elmar Gehlen

Yun Liu

Ze Yuan

Jaeyoung Kang

Ionut A Mirel

Han-Chieh Chang

William Matthew Pender Paul

Baris Posat

Xingfeng He

Giovanni Azzellino

Jeongsup Lee

Shengzhe Jiao

Gautam Agrawal

Anatole Huang

Mittul Gupta

Yanghyo Kim

Mojtaba Fallahpour

SeyedAli TaheriTari

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

Electronic displays and electronic devices including such electronic displays and antennas are provided for improved transmission of signals through circuitry of the electronic display. The electronic display may include multiple power supply tiles that are separated with non-conductive gaps to reduce circulation of eddy currents induced by the transmission signals. Moreover, voltage supply routing paths within the power supply tiles may be grouped to provide non-conductive gaps within the power supply tiles. Accordingly, the antenna may provide the transmission signals through the electronic display with improved efficiency based on reducing surface currents (e.g., eddy currents) on the electronic display.

Display and antenna co-design to reduce antenna transmission loss

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

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

Santa Clara, CA, United States of America

Mahdi Farrokh Baroughi