Gate driver circuit using pre-charge structure and time-division multiplexing driving scheme for active-matrix LCDs integrated with in-cell touch structures

Chih Lung Lin, Ming Yang Deng, Chia En Wu, Po Syun Chen, Ming Xun Wang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

This paper presents a new gate driver circuit for active-matrix liquid crystal displays with an in-cell touch structure designed by hydrogenated amorphous silicon thin-film transistors. To increase the reporting rate of a touch panel, the proposed circuit can be used to pause display operations to perform touch sensing operations several times per frame. The proposed circuit exploits a pre-charge structure that alleviates the leakage current and long-term stress of a driving TFT during the touch sensing operation. Simulation results confirm that the proposed gate driver circuit can generate a highly uniform output waveform after each touch sensing operation that lasts for 200 μs when the circuit is operate at 85 °C. The variations of the rising and falling time are suppressed below 3.71%, confirming the feasibility of use of the proposed gate driver circuit for an in-cell touch panel.

Original languageEnglish
Article number7548316
Pages (from-to)1238-1241
Number of pages4
JournalJournal of Display Technology
Volume12
Issue number11
DOIs
Publication statusPublished - 2016 Nov

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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