LTPS-TFT Pixel Circuit Compensating for TFT Threshold Voltage Shift and IR-Drop on the Power Line for AMOLED Displays. (17th June 2012)

• Record Type: Journal Article
• Authors: Fan, Ching-Lin; Shang, Min-Chi; Lin, Wei-Chun; Chang, Hsiu-Chen; Chao, Kuang-Chi; Guo, Bo-Liang
• Other Names: Qiu Yong Academic Editor.
• Is Part Of: Advances in materials science and engineering. Volume 2012(2012)
• Publication Date: 2012-06-17
• Subjects: Materials science -- Periodicals; Materials science; Periodicals; 620.11
• DOI: 10.1155/2012/270865
• Languages: English
• ISSNs: 1687-8434

Abstract

Abstract : We propose a new pixel design for the active matrix organic light-emitting diode (AMOLED) using low-temperature polycrystalline silicon thin-film transistors (LTPS-TFTs). The proposed pixel is composed of four switching TFTs, one driving TFT (DTFT), and one capacitor. The simulation results are performed by AIM-SPICE software. The error rate of OLED output current with V TH (threshold voltage) variation (0.3 V) and V dd power line drop by 1 V are improved to about 1.67% and 15%, respectively. Thus, the proposed pixel circuit can successfully overcome drawbacks suffered from DTFT threshold voltage deviation and IR-drop on power line.