Title :
A Novel Voltage Driving Method Using 3-TFT Pixel Circuit for AMOLED
Author :
Lin, Chih-Lung ; Tsai, Tsung-Ting
Author_Institution :
Nat. Cheng Kung Univ., Tainan
fDate :
6/1/2007 12:00:00 AM
Abstract :
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.
Keywords :
LED displays; SPICE; driver circuits; integrated circuit modelling; organic light emitting diodes; thin film transistors; threshold elements; 3-TFT pixel circuit; OLED current; SPICE simulation; active-matrix organic light-emitting diodes; automatic integrated circuit modeling; thin-film transistor; threshold voltage variation; voltage driving; Active matrix organic light emitting diodes; Active matrix technology; Brightness; Circuit analysis; Circuit simulation; Integrated circuit modeling; Organic light emitting diodes; Thin film transistors; Threshold voltage; Voltage control; Active-matrix organic light-emitting diode (AMOLED);
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2007.896895
