A Low-Power Scan Driver Circuit for Oxide TFTs

The scan driver composed of oxide thin-film transistors (TFTs) tends to exhibit anomalously high power consumption because the oxide TFT often has negative threshold voltage. In order to resolve this problem, we have invented a new scan driver circuit in which most TFTs are turned off with negative...

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Veröffentlicht in:	IEEE electron device letters 2012-08, Vol.33 (8), p.1144-1146
Hauptverfasser:	PI, Jae-Eun, RYU, Minki, PARK, Keechan, HWANG, Chi-Sun, YANG, Shinhyuk, SANG-HEE KO PARK, YOON, Sung-Min, LEEM, Hongkyun, KIM, Younkyung, KIM, Joondong, HWAN SOOL OH
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Clocks Driver circuits Electrical engineering. Electrical power engineering Electronic equipment and fabrication. Passive components, printed wiring boards, connectics Electronics Exact sciences and technology Integrated circuit modeling Load modeling Logic gates Low power negative threshold voltage oxide thin-film transistors (TFTs) Power demand Power electronics, power supplies scan driver Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Thin film transistors Transistors
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Beschreibung
Zusammenfassung:	The scan driver composed of oxide thin-film transistors (TFTs) tends to exhibit anomalously high power consumption because the oxide TFT often has negative threshold voltage. In order to resolve this problem, we have invented a new scan driver circuit in which most TFTs are turned off with negative V GS and no TFT with zero V GS is located between the high and low supply voltages. As a result, we could maintain the power consumption within six times of the normal value in spite of the negative threshold voltage of the oxide TFT.
ISSN:	0741-3106 1558-0563
DOI:	10.1109/LED.2012.2200873