Apple Inc.

Hsin-Ying Chiu

Wei Hsin Yao

Chaohao Wang

Hyunwoo Nho

Junhua Tan

Hyunsoo Kim

Yun Yu Wang

Shih Chang Chang

Derek Keith Shaeffer

Chun-Yao Huang

Kingsuk Brahma

Jie Won Ryu

Sun-il Chang

Baris Cagdaser

Shengkui Gao

Jesse Aaron Richmond

Kyung Wook Kim

Szu-Hsien Lee

Injae Hwang

Jiun-Jye Chang

Shiping Shen

Myungjoon Choi

Ching-Sang Chuang

Yunhui Hou

Myung-Je Cho

Majid Gharghi

Pei-En Chang

Alex H Pai

Hossein Nemati

Yongjun Li

Mohammad Reza Esmaeili Rad

Changki Min

Xin Lin

Hei Kam

Aida Raquel Colon-Berrios

Weichuan Yao

Shihchang Chang

An electronic device includes an electronic display having an active area comprising a pixel. The electronic device also includes processing circuitry configured to receive image data and predict a change in threshold voltage associated with a transistor of the pixel based at least in part on the image data. Furthermore, the processing circuitry is configured to adjust the image data to generate adjusted image data based at least in part on the predicted change in threshold voltage.

Image data compensation based on predicted changes in threshold voltage of pixel transistors

Current-voltage shift determination circuitry of a processing core complex coupled to the electronic display determines total current-voltage shift values at a pixel. The current-voltage shift determination circuitry then determines temperature-based current-voltage shift values at the pixel. The current-voltage shift determination circuitry extracts the temperature-based current-voltage shift values from the total current-voltage shift values to determine age-based voltage degradation values. Display compensation circuitry of the processing core complex adjusts display of image data by the pixel based on the age-based voltage degradation values. In this manner, voltage degradation due to pixel aging may be determined separately from current-voltage shift due to temperature, and, as such, be more accurately compensated for, resulting in better display of image data. Compensation may thus be performed based on the age of the pixels and a sensed temperature at the pixels, instead of by constantly sensing current across the diodes of the pixels.

Differentiating voltage degradation due to aging from current-voltage shift due to temperature in displays

An electronic device may have a housing and a display in the housing. The display may have one or more curved edges such as curved edges associated with rounded corners in the display and housing. The display may have an array of pixels. The display may include full-strength pixels and may have a band of antialiasing pixels having selectively reduced strengths to visually smooth content displayed along the curved edges. The pixels may be organic light-emitting diode pixels, liquid crystal display pixels, or other display pixels. Organic light-emitting diode pixels may have drive transistors and associated organic light-emitting diodes. Selectively elevated series or opaque light blocking structures of selectively reduced areas may be used to selectively reduce the strength of the antialiasing pixels. Liquid crystal display pixels may include electrodes of different shapes and/or opaque layer openings of different sizes to form antialiasing pixels in desired patterns.

Pixel array antialiasing to accommodate curved display edges

Growing community of inventors

San Jose, CA, United States of America

Hsin-Ying Chiu