Robust Bidirectional Gate Driver on Array Based on Indium Gallium Zinc Oxide Thin-Film Transistor for In-Cell Touch Displays

Liufei Zhou; Fuchao He; Xiaojun Guo; Haihong Wang; Mingxin Wang; Yuning Zhang; Baoping Wang

doi:10.1109/JEDS.2024.3404595

IEEE Journal of the Electron Devices Society (Jan 2024)

Robust Bidirectional Gate Driver on Array Based on Indium Gallium Zinc Oxide Thin-Film Transistor for In-Cell Touch Displays

Liufei Zhou,
Fuchao He,
Xiaojun Guo,
Haihong Wang,
Mingxin Wang,
Yuning Zhang,
Baoping Wang

Affiliations

Liufei Zhou: ORCiD; School of Electronic Science and Engineering, Southeast University, Nanjing, China
Fuchao He: School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China
Xiaojun Guo: ORCiD; School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China
Haihong Wang: Research and Development Department, Nanjing BOE Display Technology Company Ltd., Nanjing, China
Mingxin Wang: School of Electronic Science and Engineering, Southeast University, Nanjing, China
Yuning Zhang: ORCiD; School of Electronic Science and Engineering, Southeast University, Nanjing, China
Baoping Wang: School of Electronic Science and Engineering, Southeast University, Nanjing, China

DOI: https://doi.org/10.1109/JEDS.2024.3404595
Journal volume & issue: Vol. 12
pp. 662 – 667

Abstract

Read online

In this paper, we propose a bidirectional gate driver on array (GOA) circuit design based on indium gallium zinc oxide (IGZO) thin-film transistor (TFT) to support time-division driving method (TDDM) for in-cell touch displays. The proposed circuit allows the touch panel to pause the display for touch sensing operations to achieve a touch reporting rate as twice as the frame rate of a display. A dual low-level maintaining unit design is used to suppress influence of the threshold voltage shift of TFTs through alternately turning on the devices. Owing to recovery of threshold voltage shift under negative bias, this design can maintain stable performance during long time operation. A narrow border 6.5” in-cell LCD panel of 90 Hz display with a 180 Hz touch reporting rate is finally demonstrated.

Published in IEEE Journal of the Electron Devices Society

ISSN: 2168-6734 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6245494

About the journal

Abstract

Keywords