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A Low-Power Scan Driver Circuit for Oxide TFTs
Jae-Eun Pi,MinKi Ryu,Chi-Sun Hwang,ShinHyuk Yang,Sang-Hee Ko Park,Sung-Min Yoon,HongKyun Leem,YounKyung Kim,JoonDong Kim,Hwan Sool Oh,KeeChan Park IEEE 2012 IEEE electron device letters Vol.33 No.8
<P>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<SUB>GS</SUB> and no TFT with zero V<SUB>GS</SUB> 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.</P>