Title :
A compensation threshold voltage shift pixel circuit for active matrix organic light emitting diode
Author :
Lin, Jyi-Tsong ; Wen, Cheng-Neng ; Lin, Po-Hsieh
Author_Institution :
Dept. of EE, Nat. Sun Yat-Sen Univ., Kaohsiung
Abstract :
In this paper, we propose a new Voltage- programming pixel circuit using hydrogenated amorphous silicon (a-Si:H) thin-film transistors (TFTs) for an active matrix organic light-emitting diode (AMOLED). The proposed a-Si:H TFT pixel circuit, which consists of four p-type switching TFTs, one n-type driving TFT, two additional control signals and one storage capacitor, successfully compensated the OLED current fluctuation caused by threshold voltage shift of a-Si:H TFT and the drop on the supply voltage, the propose pixel circuit has been verified by the simulation work using HSPICE software, the simulation result show that this pixel circuit has high immunity to the variation of a-Si:H TFT characteristics.
Keywords :
LED displays; SPICE; capacitor storage; current fluctuations; driver circuits; elemental semiconductors; organic light emitting diodes; semiconductor thin films; silicon; thin film transistors; HSPICE; active matrix OLED displays; active matrix organic light-emitting diode; current fluctuation; hydrogenated amorphous silicon thin-film transistors; pixel driving circuit; storage capacitor; threshold voltage shift; voltage-programming pixel circuit; Active matrix organic light emitting diodes; Amorphous silicon; Circuit simulation; Fluctuations; Organic light emitting diodes; Switched capacitor circuits; Switching circuits; Thin film transistors; Threshold voltage; Voltage control;
Conference_Titel :
Microelectronics, 2008. MIEL 2008. 26th International Conference on
Conference_Location :
Nis
Print_ISBN :
978-1-4244-1881-7
Electronic_ISBN :
978-1-4244-1882-4
DOI :
10.1109/ICMEL.2008.4559273
