A shift register for depletion-mode oxide TFTs with very low power consumption

IEICE Electronics Express

KeeChan Park¹  SeungO Kim¹  JaeWon Lee¹  SangYun Kim¹  HwanSool Oh¹  JinTae Kim¹  JaeHyeong Jang¹  SooHo Cho¹  SangYeon Kim¹ 

[1] Department of Electronics Engineering, Konkuk University

关键词: shift register;    depletion-mode;    oxide TFT;    capacitive coupling;    power consumption;   

DOI  :  10.1587/elex.10.20130765

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(8)The shift register comprised of metal-oxide thin-film transistors (TFTs) is apt to exhibit anomalously high power consumption because the oxide TFT often has depletion-mode characteristic. We have developed a new shift register circuit in which one of the pull-down TFTs is controlled by capacitive coupling with the clock signal and the input carry signal. Employing this structure, the TFTs with non-zero VDS are always turned off with negative VGS. As a result, unnecessary current through the TFTs is eliminated and the power consumption of the new circuit decreases to the half of our previous one when the threshold voltage of the TFT is −5V.

【 授权许可】

Unknown