Apple Inc.

Skyworks Solutions, Inc.

Other

Invensense, Inc.

Hasan Akyol

Hopil Bae

Henry C Jen

Derek Keith Shaeffer

Mahdi Farrokh Baroughi

John T Wetherell

Shingo Hatanaka

Xiang Lu

Tore Nauta

Xiaofeng Wang

Bipul Agarwal

Sheng Zhang

Wei Hsin Yao

Chaohao Wang

Kapil Vinod Sakariya

Ion Bita

Sunggu Kang

James E Pedder

Christoph Horst Krah

Paolo Sacchetto

Joseph Seeger

Christian M Sauer

Dean A Badillo

Yafei Bi

Hjalmar Edzer Ayco Huitema

Mohammad Bagher Vahid Far

Baris Cagdaser

Yingkan Lin

Yunhui Hou

Chun-Yao Huang

Shinya Ono

Steven Saeed Nasiri

Enkhamgalan Dorjgotov

David W Lum

Ilya Gurin

Chengrui Le

Giovanni Carbone

Goksen G Yaralioglu

Xuebei Yang

Saif Choudhary

Xiang Fang

Hamid R Amir Firouzkouhi

Sam S Li

Chung-Lun Edwin Hsu

Patrick B Bennett

Chun-Ming Tang

Young Don Bae

Chih-Wei Yeh

Thierry S Divel

Cheuk Chi Lo

Stanley B Wang

Michael Slootsky

Shengchang Cai

Du Chen

Thomas Charisoulis

Igor Tchertkov

Nikhil Acharya

Haitao Li

Adam Adjiwibawa

Sunmin Jang

Hari P Paudel

Lingtao Wang

Ali Tabatabaei

Shengzhe Jiao

Jaeyoung Kang

Jeongsup Lee

Baris Posat

Chieh-Chien Lin

Eric A Hildebrandt

Rajesh Velayuthan

Runjie Xu

Hooman Torabi Parizi

An electronic device may include an electronic display including display pixels to display an image based on compensated image data. As image data is written to a pixel in the row of pixels, capacitive coupling at a driver may lead to distortion on the driver. In particular, the capacitive coupling may cause distortion at a storage capacitor, which may lead to current droop at the pixel. The current droop may be reduced or eliminated in each pixel by performing pixel compensation. The pattern of the pixel compensation may be selected such that, over a number of subframes, an average amount of light is the same or similar to what would be emitted had pixel compensation been performed on each pixel in each subframe.

In-pixel compensation for current droop and in-pixel compensation timing

A sensing circuit includes at least a first gain stage and a controller for controlling the operation of the first gain stage. The first gain stage includes an amplifier having at least one input and one output, and a feedback loop coupled between the input and the output of the amplifier. The feedback loop includes a first capacitor coupled between the input and the output of the amplifier, and a second capacitor having a first terminal coupled to the input of the amplifier through a first switch and a second terminal coupled to the output of the amplifier through a second switch. The second capacitor is configured to be coupled in parallel to the first capacitor during a first portion of a measurement cycle, and disconnected from the first capacitor during a second portion of the measurement cycle.

Sensing circuit with enhanced dynamic range and accuracy

In an embodiment, an electronic display may include an electronic display panel that includes a plurality of display pixels configured to emit light; a first pre-charge voltage source; and a second pre-charge voltage source; and a microdriver that may include: a capacitor coupled at a first terminal to the first pre-charge voltage source and coupled at a second terminal to the second pre-charge voltage source; and a buffer. The buffer may include a positive input terminal coupled to the first pre-charge voltage source and the capacitor; an output terminal coupled to a plurality of driving circuits; and a negative input terminal coupled to the output terminal.

Systems and methods for IR-independent pre-charge and inverter- based IR reduction

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

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 integrated touchscreen can include light emitting diodes or organic light emitting diodes (LEDs/OLEDs), display chiplets and touch chiplets disposed in a visible area of the integrated touch screen. For example, the LEDs/OLEDs, display chiplets and touch chiplets can be placed on a substrate by a micro-transfer tool. The integrated touchscreen can also include electrodes disposed in the visible area of the integrated touch screen. The electrodes can be capable of providing display functionality via the one or more display chiplets during display operation (e.g., operating as cathode terminals of the LEDs during the display operation) and capable of providing touch functionality via the touch chiplets during touch operation (e.g., touch node electrodes can be formed from groups of the electrodes and sensed). In some examples, the touch node electrodes can be formed and coupled to touch chiplets via the display chiplets.

Touch sensing utilizing integrated micro circuitry

Systems and methods may reduce or eliminate image artifacts due to a defective pixel of an electronic display. An electronic display may include pixels that respectively include a self-emissive element, pixel drive circuitry that supplies a pixel drive current to drive the self-emissive element, and signal routing circuitry that reduces or eliminates a visual artifact due to a defective pixel among the pixels. The signal routing circuitry may do this by turning off the self-emissive element, supplying image data from the pixel drive circuitry to a first adjacent pixel, or receiving image data from other pixel drive circuitry from the first adjacent pixel or a second adjacent pixel.

Pixel screening and repair

Embodiments disclosed herein provide systems and methods for testing and repairing various aspects of an electronic display. The electronic display includes a reference array and an active array. The electronic display also includes test circuitry used to test individual or any combination of pixels of the electronic display. Switches may be disposed between the pixels and the test circuitry to be to repair the various components of the electronic display.

On-chip testing architecture for display system

Circuitry for screening defective portion of display chip

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.

Enhanced smoothness digital-to-analog converter interpolation systems and methods

Defective display source driver screening and repair

Embodiments disclosed herein provide systems and methods for testing and compensating for pixel degradation in an electronic display based on current and voltage values sensed in a reference array. An electronic display includes an active array, a reference array, and sensing circuitry. A compensation manager obtains current data values of the reference array from the sensing circuitry. The compensation manager generates a current-voltage curve based on the current data and adjusts the current-voltage curve to compensate for variations in temperature and/or pixel brightness. In this way, the compensation manager may improve performance of the electronic display by, for example, by reducing visible anomalies.

Reference array current sensing

Growing community of inventors

Mountain View, CA, United States of America

Hasan Akyol