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P‐19: Vth Shift Overcompensation in AMOLEDs for Differential Aging Compensation
Author(s) -
Miwa Koichi,
Maekawa Yuichi,
Tsujimura Takatoshi
Publication year - 2009
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3256489
Subject(s) - amoled , compensation (psychology) , differential (mechanical device) , pixel , materials science , oled , thin film transistor , optoelectronics , physics , optics , composite material , psychology , layer (electronics) , active matrix , psychoanalysis , thermodynamics
Abstract AMOLED displays suffer from differential aging of pixels, leading to image burn‐in on a display. Vth shift ofa‐Si TFT can be utilized as a stress monitor of an OLED to compensate for differential aging. A Vth shift overcompensation pixel circuit is proposed and simulation results are provided. The simulation indicates that the Vth overcompensation improves burn‐in lifetime by a factor of 10 compared with a conventional Vth compensation.