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A Novel Voltage Driving Method Using 3-TFT Pixel Circuit for AMOLED

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2 Author(s)
Chih-Lung Lin ; Nat. Cheng Kung Univ., Tainan ; Tsung-Ting Tsai

A novel voltage driving method using three thin-film transistors (TFTs) for active-matrix organic light-emitting diodes (OLEDs) is presented and verified by automatic integrated circuit modeling SPICE simulation. The proposed novel 3-TFT pixel circuit, which successfully compensates for the threshold voltage variations, uses few TFTs with simplified control signals, and the current nonuniformity of the proposed circuit is 0.19% to 1.99% throughout the entire data range. To compensate for variations in OLED current, the proposed circuit utilizes a novel driving scheme that uses a diode connection current source with a biased voltage.

Published in:

Electron Device Letters, IEEE  (Volume:28 ,  Issue: 6 )