LTPS-TFT Pixel Circuit Compensating for TFT Threshold Voltage Shift and IR-Drop on the Power Line for AMOLED Displays | Zendy

Ching-Lin Fan | Zendy; Min-Chi Shang | Zendy; Wei-Chun Lin | Zendy; HsiuChen Chang | Zendy; Kuang-Chi Chao | Zendy; Bo-Liang Guo | Zendy

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LTPS-TFT Pixel Circuit Compensating for TFT Threshold Voltage Shift and IR-Drop on the Power Line for AMOLED Displays

Author(s) -

Ching-Lin Fan,

Min-Chi Shang,

Wei-Chun Lin,

HsiuChen Chang,

Kuang-Chi Chao,

Bo-Liang Guo

Publication year - 2012

Publication title -

advances in materials science and engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.356

H-Index - 42

eISSN - 1687-8442

pISSN - 1687-8434

DOI - 10.1155/2012/270865

Subject(s) - amoled , thin film transistor , materials science , oled , threshold voltage , optoelectronics , capacitor , pixel , diode , active matrix , transistor , electrical engineering , voltage , physics , optics , nanotechnology , engineering , layer (electronics)

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 (threshold voltage) variation (0.3 V) and 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

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