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 journalArticle

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

Fingerprint

Coupled circuits
Liquid crystal displays
Pixels
Electric potential
Zinc Oxide
Gallium
Indium
Thin film transistors
Zinc oxide
Oxide films
Networks (circuits)
Capacitors

All Science Journal Classification (ASJC) codes

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

Cite this

Lin, Chih Lung ; Lai, Po Cheng ; Cheng, Mao Hsun ; Lai, Po Chun ; Lee, Chia Lun. / Novel Pixel Circuit Using Coupling Method to Achieve High Driving Voltage for Blue-Phase LCDs. In: IEEE Transactions on Electron Devices. 2017 ; Vol. 64, No. 11. pp. 4768-4771.
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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.",
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Novel Pixel Circuit Using Coupling Method to Achieve High Driving Voltage for Blue-Phase LCDs. / Lin, Chih Lung; Lai, Po Cheng; Cheng, Mao Hsun; Lai, Po Chun; Lee, Chia Lun.

In: IEEE Transactions on Electron Devices, Vol. 64, No. 11, 8076854, 11.2017, p. 4768-4771.

Research output: Contribution to journalArticle

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AU - Lai, Po Cheng

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AB - 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.

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