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P‐18: Highly Stable Amorphous Silicon Thin Film Transistor AMOLED Panel Employing Optical Feedback Compensation Pixel Circuit
Author(s) -
Shin HeeSun,
Lee JeongSoo,
Park SangGeun,
Han MinKoo,
Yoo JuhnSeok,
Kim ChangDong,
Kang InByeong
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 - 10.1889/1.3256488
Subject(s) - amoled , thin film transistor , oled , pixel , materials science , optoelectronics , luminance , threshold voltage , dot pitch , degradation (telecommunications) , compensation (psychology) , diode , transistor , voltage , electronic engineering , electrical engineering , computer science , active matrix , engineering , artificial intelligence , nanotechnology , psychology , layer (electronics) , psychoanalysis
The optical feedback scheme can compensate the threshold voltage variation of TFT and OLED as well as the degradation of OLED efficiency. The new optical feedback pixel circuit integrating a‐Si:H TFT photo sensor which is designed with the reversed diode‐connected TFT is proposed and fabricated. We have fabricated the 0.85 inch AMOLED panels (56 pixels × 84 pixels) employing the new optical feedback pixel circuits. The luminance degradation of AMOLED panel employing the proposed pixel after 12 hours chess board patterned stress is less than 12%, while the conventional one has 37% of luminance degradation.