Abstract
An active matrix organic light emitting diode (AMOLED) uses thin film transistor (TFT) as driving and switching component. However, a non-negligible VTH variation of the driving TFT due to process variation or prolonged operation directly influences the quality of the AMOLED display.This thesis proposes two novel pixel circuits and experimentally verifies the results of previous research. The first proposed 3T1C circuit is associated with a novel driving scheme to compensate for the threshold voltage shift in driving TFT with the simplest control signals. The second proposed 3T1C circuit operates in the triode region and improves upon the high-power consumption of the first circuit. Moreover, the second circuit keeps the simplest control signals and the fewer TFTs structure. The proposed circuits are associated with entirely new driving schemes for an AMOLED pixel circuit and will contribute markedly to AMOLED applications in the future.
The previously proposed 5T1C circuit is fabricated and its performance is measured in this thesis. The experimental results reveal that the circuit can improve the uniformity of the display and extended the lifetime of the AMOLED display.
| Date of Award | 2007 |
|---|---|
| Original language | Chinese (Traditional) |
| Supervisor | Chih-Lung Lin (Supervisor) |