A new current-programmed pixel circuit for activematrix organic light emitting diodes (AMOLEDs), based on Organic TFTs (OTFTs), is proposed and verified by SPICE simulations. The simulation results show that the proposed pixel circuit, which is a current mirror structure consisting of five Organic T...
A new current-programmed pixel circuit for activematrix organic light emitting diodes (AMOLEDs), based on Organic TFTs (OTFTs), is proposed and verified by SPICE simulations. The simulation results show that the proposed pixel circuit, which is a current mirror structure consisting of five Organic TFTs and one capacitor, has reliable linear characteristics between input current and output OLED current. Also, the threshold voltage degradation of Organic TFTs due to long time operation stress is well compensated to reliable values.
A new current-programmed pixel circuit for activematrix organic light emitting diodes (AMOLEDs), based on Organic TFTs (OTFTs), is proposed and verified by SPICE simulations. The simulation results show that the proposed pixel circuit, which is a current mirror structure consisting of five Organic TFTs and one capacitor, has reliable linear characteristics between input current and output OLED current. Also, the threshold voltage degradation of Organic TFTs due to long time operation stress is well compensated to reliable values.
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제안 방법
using HSPICE circuit simulator. By measuring the device characteristics of the Organic TFT by using HP4156B, the model parameters were extracted by precise curve fitting. Fig.
In this work, progress is made in driving AMOLED displays with organic TFTs, using a current mirror structure. This will be set as basic studies on using organic TFTs in AMOLED displays with some problems and its solution mentioned.
대상 데이터
The proposed pixel circuit consists of four switching Organic TFTs and one driving Organic-TFT(T4) with one storage capacitor(Cs). The operation of the proposed pixel circuit is as follows.
성능/효과
SPICE simulation. The simulation results, based on the measurement of organic-TFT, s electrical characteristics, exhibit reliable linear characteristics between the input current and output OLED current. Also, the proposed pixel structure successfully compensates the threshold voltage degradation of TFTs and OLED.
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