High Resolution a-IGZO TFT Pixel Circuit for Compensating Threshold Voltage Shifts and OLED Degradations | Zendy

Daejung Kim | Zendy; Yongchan Kim | Zendy; Suwon Lee | Zendy; Moon Sung Kang | Zendy; Do Hwan Kim | Zendy; Hojin Lee | Zendy

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High Resolution a-IGZO TFT Pixel Circuit for Compensating Threshold Voltage Shifts and OLED Degradations

Author(s) -

Daejung Kim,

Yongchan Kim,

Suwon Lee,

Moon Sung Kang,

Do Hwan Kim,

Hojin Lee

Publication year - 2017

Publication title -

ieee journal of the electron devices society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.69

H-Index - 31

ISSN - 2168-6734

DOI - 10.1109/jeds.2017.2716368

Subject(s) - components, circuits, devices and systems , engineered materials, dielectrics and plasmas

In this paper, we propose a novel voltage programmed pixel circuit based on amorphous-indium-gallium-zinc-oxide thin-film transistors (a-IGZO TFTs) for active-matrix organic light-emitting displays. Through the extensive simulation work based on a-IGZO TFT and OLED models, we confirm that the proposed pixel circuit can compensate for threshold voltage variations of TFTs and OLED degradation over wide dynamic range (~104) of OLED current as well as achieve a high pixel aperture ratio with the suppressed OLED current error rate below 9%.

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