Apple Inc.

Li-Xuan Chuo

Hyunwoo Nho

Kingsuk Brahma

Jie Won Ryu

Hyunsoo Kim

Chaohao Wang

Myungjoon Choi

Alex H Pai

Yao Shi

Shatam Agarwal

Wei Hsin Yao

Chin-Wei Lin

Shinya Ono

Shengkui Gao

Jesse Aaron Richmond

ByoungSuk Kim

Mohammad Ali Jangda

Shiping Shen

David S Zalatimo

Yue Jack Chu

Rungrot Kitsomboonloha

Graeme M Williams

Pei-En Chang

Vehbi Calayir

Hassan Edrees

Ce Zhang

Steven N Hanna

Sachiko Oda

Jesse R Manders

This disclosure provides various techniques for providing fine-grain digital and analog pixel compensation to account for voltage error across an electronic display. By employing a two-dimensional digital compensation and a local analog compensation, a fine-grain and robust pixel compensation scheme may be provided to the electronic display.

Two-dimensional content-adaptive compensation to mitigate display voltage drop

An electronic device may include an electronic display having multiple display pixels to display an image based on analog voltage signals. The electronic device may also include optical calibration circuitry to generate digital-to-analog converter (DAC) data based on image data associated with the image and dither circuitry to reduce a bit-depth of the DAC data, generating dithered DAC data. Additionally, the electronic device may include a gamma generator having one or more DACs to generate the analog voltage signals based on the dithered DAC data, which may instruct the gamma generator to generate the analog voltage signals indicative of the image data.

Dither enhancement of display gamma DAC systems and methods

Systems, methods, and devices are provided for mitigating visual artifacts by dynamically tuning bias voltages applied to display pixels. An electronic display may include a display pixel and a bias voltage supply. The bias voltage supply may supply a first bias voltage to the display pixel for a first subframe of a frame of image data. The bias voltage supply may supply a different second bias voltage to the display pixel for a second subframe of the frame of image data. This may mitigate certain image artifacts, such as flicker or variable refresh rate luminance difference, that could arise due to display pixel hysteresis that varies across subframes of the image frame.

Dynamic voltage tuning to mitigate visual artifacts on an electronic display

An electronic display may include pixel circuitry to display an image based on image data compensated for voltage variations within the pixel circuitry. Image processing circuitry may generate a compensation value to compensate the image data for cross-talk (e.g., electromagnetic coupling between an electrode of touch sensor circuitry and an electrode of the pixel circuitry) that may cause the voltage variations. Additionally or alternatively, the image processing circuitry may generate another compensation value to compensate the image data for another cross-talk (e.g., electromagnetic coupling between two electrodes of the pixel circuitry). The image processing circuitry may generate the compensated image data based on the first compensation value and/or the second compensation value.

Electronic display cross-talk compensation systems and methods

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Cupertino, CA, United States of America

Li-Xuan Chuo