Apple Inc.

Weichuan Yao

Chaohao Wang

Hyunwoo Nho

Kingsuk Brahma

Jie Won Ryu

Sun-il Chang

Shengkui Gao

Junhua Tan

Jesse Aaron Richmond

Hyunsoo Kim

Injae Hwang

Shiping Shen

Myungjoon Choi

Myung-Je Cho

Wei Hsin Yao

Chin-Wei Lin

Hung Sheng Lin

Yafei Bi

Yunhui Hou

Changki Min

Kavinaath Murugan

Hsin-Ying Chiu

Electronic devices and methods for compensating for aging or other effects in a display during a non-transmitting state (off state) of the display. Sensing may include emissive element sensing of the display and/or thin film transistor sensing of the display. Compensating for the effects may preserve or increase a uniformity of transmission of the display.

Display off-time sensing

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

Growing community of inventors

San Diego, CA, United States of America

Weichuan Yao