研究目的
To propose a new external compensation pixel circuit using parallel addressing scheme to compensate for threshold voltage variations of TFTs and I-R drop of power line in high-resolution AMOLED displays.
研究成果
The proposed external compensation pixel circuit can successfully compensate for threshold voltage variations of TFTs and I-R drop of power line, producing high uniformity OLED currents, which is suitable for use in high-resolution AMOLED displays.
研究不足
The study is based on simulation results, and practical implementation may face challenges such as fabrication tolerances and environmental conditions affecting performance.
1：Experimental Design and Method Selection:
The proposed pixel circuit combines parallel addressing scheme and voltage-programming method to increase compensation time for accurately detecting threshold voltage variations of driving TFT and the voltage drop in power line.
2：Sample Selection and Data Sources:
Simulation with HSPICE software was conducted to verify the feasibility and performance of the proposed circuit.
3：List of Experimental Equipment and Materials:
The circuit is composed of LTPS-TFTs and an external threshold voltage compensation circuit shared by the whole row.
4：Experimental Procedures and Operational Workflow:
The operation of the proposed pixel circuit is divided into three periods – reset and compensation period, data input period, and emission period.
5：Data Analysis Methods:
The simulation results were analyzed to verify the compensation ability of the proposed scheme.
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