Voltage-Programming-Based Pixel Circuit to Compensate for Threshold Voltage and Mobility Using Natural Capacitance of Organic Light-Emitting Diode

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概要

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• A voltage-programming-based pixel circuit with three thin-film transistors (TFTs) and one capacitor (3T1C) is proposed and simulated for active-matrix organic light-emitting diode (AMOLED) displays. Unlike the previously published voltage-programming pixel circuits, which only compensate for threshold voltage ($V_{\text{T}}$) unevenness, this circuit also compensates for mobility ($\mu$) unevenness. OLEDs can be used not only as light-emitting devices but also as capacitors. This circuit uses the natural capacitance of OLEDs to compensate for the mobility unevenness. The Rensselaer Polytechnic Institute (RPI) model of smart simulation program with integrated circuit emphasis (SMART SPICE) is used to simulate the circuit. Moreover, we propose another pixel circuit that consists of three TFTs and two capacitors (3T2C). The additional capacitor allows control of the range of the data voltage of each color.

• 2010-03-25

著者

• Park Sang-ho

  Department Of Chemical Engineering Hanyang University

• Jung Myoung-Hoon

  Department of Electronic and Electrical Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Republic of Korea

• Myoung-Hoon Jung

  Department of Electronic and Electrical Engineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea

• Park Young-Ju

  Department of Electronic and Electrical Engineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea

• Sang-Ho Park

  Department of Electronic and Electrical Engineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea

• Ohyun Kim

  Department of Electronic and Electrical Engineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea

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