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Voltage-Induced Director Orientations in IPS-Liquid Crystal Cells with Different Electrode Structures

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Abstract:

In-plane switching (IPS) liquid crystal displays (LCDs) with low operating voltages and high contrast ratios can be achieved by optimizing the electrode structure. The optimized electrode structure may produce a strong transverse electric field within the IPS liquid crystal (LC) cell, resulting in a smaller on-state voltage (Von). This work investigates the electro-optical properties of IPS-LC cells with different electrode configurations through simulation studies. Four configurations are proposed herein, including two flat-IPS and two wall-IPS LC cells with different geometric dimensions. The results reveal that reducing the geometric dimensions within similar structures leads to a lower Von and a higher contrast ratio due to the stronger electric field generated by narrower electrodes and smaller gaps. The wall-IPS configuration exhibits a lower Von and a higher contrast ratio compared to the flat-IPS configuration because the stronger electric field can more effectively reorient the LC molecules in the wall-IPS LC cell. The voltage-induced director orientations in both the flat-IPS and wall-IPS configurations confirm that the transverse electric field in the wall electrodes is stronger than that in the flat electrodes at equivalent voltages. Consequently, the LC molecules experience significant reorientation, which results in a reduced Von and an increased contrast ratio in the wall-IPS LC cells. The wall IPS-LC cell with a low voltage and high contrast ratio has the potential for the development of high-performance advanced LC devices.

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Periodical:

Key Engineering Materials (Volume 1059)

Pages:

33-38

DOI:

https://doi.org/10.4028/p-w8WDY1

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Online since:

June 2026

Authors:

Risti Suryantari*, Chia Yi Huang

Keywords:

Liquid Crystal, Liquid Crystal Display, Wall Electrode, Wall-IPS

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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