Novel Pixel Circuit Using Coupling Method to Achieve High Driving Voltage for Blue-Phase LCDs

Chih Lung Lin, Po Cheng Lai, Mao Hsun Cheng, Po Chun Lai, Chia Lun Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This paper presents a new pixel circuit that uses amorphous indium-gallium-zinc-oxide thin-film transistors (a-IGZO TFTs) for use in in-plane switching blue-phase liquid-crystal displays (IPS BPLCDs). The proposed pixel circuit has a simple structure that involves only three TFTs and two capacitors. To drive the high transmittance of the BPLCs, the coupling mode with a two-voltage-level signal is designed to produce a higher operating voltage. To confirm the feasibility of the proposed pixel circuit, the electrical characteristics of a fabricated a-IGZO TFT are measured and used to construct the RPI simulation model in HSPICE. Simulation results demonstrate that the maximum operating voltage is 29.884 V with an input data voltage of 15 V, so the required voltage of high transmittance of BPLCs is achieved.

Original languageEnglish
Article number8076854
Pages (from-to)4768-4771
Number of pages4
JournalIEEE Transactions on Electron Devices
Volume64
Issue number11
DOIs
Publication statusPublished - 2017 Nov

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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