Title :
A Low-Power Scan Driver Circuit for Oxide TFTs
Author :
Pi, Jae-Eun ; Ryu, MinKi ; Hwang, Chi-Sun ; Yang, ShinHyuk ; Park, Sang-Hee Ko ; Yoon, Sung-Min ; Leem, HongKyun ; Kim, YounKyung ; Kim, JoonDong ; Oh, Hwan Sool ; Park, KeeChan
Author_Institution :
Convergence Components & Mater. Res. Lab., Electron. & Telecommun. Res. Inst., Daejeon, South Korea
Abstract :
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 VGS and no TFT with zero VGS 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.
Keywords :
driver circuits; low-power electronics; thin film transistors; low power scan driver circuit; negative threshold voltage; oxide thin film transistors; Clocks; Driver circuits; Integrated circuit modeling; Load modeling; Logic gates; Power demand; Thin film transistors; Low power; negative threshold voltage; oxide thin-film transistors (TFTs); scan driver;
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2012.2200873
