Investigation of Temperature Effect and Parameters Modulation on Active Matrix Organic Light-EmittingDiode Display
| Autor: | Chi-Ming Cheng, 鄭啟明 |
|---|---|
| Rok vydání: | 2006 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 95 In this thesis, the temperature effect on driving circuits of active matrix organic light emitting diode display with both materials of amorphous and polycrystalline silicon TFT is investigated. The results of simulation manifest that circuit with amorphous silicon thin-film transistor tends to be positive temperature dependence, whereas circuit with polycrystalline silicon thin-film transistor tends to be negative temperature dependence which is the same behavior as single crystal material. The modulated parameters of storage capacitor and data voltage, the variation of threshold voltage and carrier field effect mobility are also studied. We utilize the numerical method to obtain the equations fitting the curves from simulation data and successfully quantify the circuit behaviors except qualitative description. It is convenient to evaluate various characteristics of the driving circuits via these equations we develop. The simulator tool, HSPICE, for circuit simulation and MATLAB for curve fitting to obtain the equations are performed in this thesis. The simulation results strongly indicate that poly-Si TFT applied in AM-OLED is more superior than a-Si TFT, although the non-uniformity of electrical characteristics caused by excimer laser crystallization (ELC) facility is a severe problem to fabricate large size and low cost panels. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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