Premium
P‐12: A New Stable a‐Si:H TFT Pixel for AMOLED by Employing the a‐Si:H TFT Photo Sensor
Author(s) -
Shin HeeSun,
Park HyunSang,
Lee Woocheul,
Han MinKoo,
Yoo JuhnSeok,
Kim ChangDong,
Kang InByeong
Publication year - 2008
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 - 10.1889/1.3069353
Subject(s) - amoled , thin film transistor , luminance , oled , pixel , compensation (psychology) , materials science , photoelectric sensor , optoelectronics , computer science , electrical engineering , artificial intelligence , active matrix , engineering , nanotechnology , psychology , layer (electronics) , psychoanalysis
The optical feedback pixel circuit has been attractive compensation scheme for improving AMOLED display quality. We reported that the photoelectric characteristics of the a‐Si:H TFT as the integrated photo sensor under two bias condition (Vgs=0V, Vgs<0V). And we proposed a new optical feedback pixel circuit integrating the a‐Si:H TFT photo sensor in each pixel. In order to improve the compensation ability, the sensor part is separated to the gate of driving TFT during selecting time. We verified the proposed pixel circuit could compensate the variation of OLED luminance not only by TFT degradation, but also by OLED degradation. We will also report the experimental results.