Smart window with reduced operating voltage and frequency by combining NMP-LC and EHDI scattering effects

Niveen Huseen; Zaher M.A. Judeh; Ibrahim Abdulhalim

doi:10.1117/12.3017080

Smart window with reduced operating voltage and frequency by combining NMP-LC and EHDI scattering effects

Niveen Huseen, Zaher M.A. Judeh, Ibrahim Abdulhalim^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Recently a new mode of liquid crystal LC SW was developed based on the doping of nanoporous microparticles in LCs called NMP-LC mode. However, all the works reported so far used an LC with positive dielectric anisotropy that gave a normally opaque window. Here we report on a normally transparent smart window based on NMP-LC mode using vertical alignment and an LC with negative dielectric anisotropy, doped with cochleate organic particles. The device exhibits a high transparency in the OFF state and a high scattering in the ON state compared with normally opaque NMP-LC. The durability test shows that the SW device switches at least 5184 times without degradation of optical contrast. The scattering mode is caused by the combination of two effects: the NMP effect and the electro-hydrodynamic instability effect. The synergy between these two effects manifests in lower operating voltage and frequency requirements for the device, hence less energy consumption. The electric power that is needed is estimated to be 0.25

Original language	English
Title of host publication	Liquid Crystals Optics and Photonic Devices
Editors	Ibrahim Abdulhalim, Camilla Parmeggiani
Publisher	SPIE
ISBN (Electronic)	9781510673502
DOIs	https://doi.org/10.1117/12.3017080
Publication status	Published - 2024
Externally published	Yes
Event	Liquid Crystals Optics and Photonic Devices 2024 - Strasbourg, France Duration: Apr 8 2024 → Apr 11 2024

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	13016
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Liquid Crystals Optics and Photonic Devices 2024
Country/Territory	France
City	Strasbourg
Period	4/8/24 → 4/11/24

Bibliographical note

Publisher Copyright:
© 2024 SPIE.

ASJC Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Keywords

electro-hydrodynamic instability effect
light scattering
liquid crystals
nano-porous micro-particles
smart windows

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1117/12.3017080

Cite this

Huseen, N., Judeh, Z. M. A., & Abdulhalim, I. (2024). Smart window with reduced operating voltage and frequency by combining NMP-LC and EHDI scattering effects. In I. Abdulhalim, & C. Parmeggiani (Eds.), Liquid Crystals Optics and Photonic Devices Article 130160N (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 13016). SPIE. https://doi.org/10.1117/12.3017080

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title = "Smart window with reduced operating voltage and frequency by combining NMP-LC and EHDI scattering effects",

abstract = "Recently a new mode of liquid crystal LC SW was developed based on the doping of nanoporous microparticles in LCs called NMP-LC mode. However, all the works reported so far used an LC with positive dielectric anisotropy that gave a normally opaque window. Here we report on a normally transparent smart window based on NMP-LC mode using vertical alignment and an LC with negative dielectric anisotropy, doped with cochleate organic particles. The device exhibits a high transparency in the OFF state and a high scattering in the ON state compared with normally opaque NMP-LC. The durability test shows that the SW device switches at least 5184 times without degradation of optical contrast. The scattering mode is caused by the combination of two effects: the NMP effect and the electro-hydrodynamic instability effect. The synergy between these two effects manifests in lower operating voltage and frequency requirements for the device, hence less energy consumption. The electric power that is needed is estimated to be 0.25",

keywords = "electro-hydrodynamic instability effect, light scattering, liquid crystals, nano-porous micro-particles, smart windows",

author = "Niveen Huseen and Judeh, {Zaher M.A.} and Ibrahim Abdulhalim",

note = "Publisher Copyright: {\textcopyright} 2024 SPIE.; Liquid Crystals Optics and Photonic Devices 2024 ; Conference date: 08-04-2024 Through 11-04-2024",

year = "2024",

doi = "10.1117/12.3017080",

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Huseen, N, Judeh, ZMA & Abdulhalim, I 2024, Smart window with reduced operating voltage and frequency by combining NMP-LC and EHDI scattering effects. in I Abdulhalim & C Parmeggiani (eds), Liquid Crystals Optics and Photonic Devices., 130160N, Proceedings of SPIE - The International Society for Optical Engineering, vol. 13016, SPIE, Liquid Crystals Optics and Photonic Devices 2024, Strasbourg, France, 4/8/24. https://doi.org/10.1117/12.3017080

Smart window with reduced operating voltage and frequency by combining NMP-LC and EHDI scattering effects. / Huseen, Niveen; Judeh, Zaher M.A.; Abdulhalim, Ibrahim.
Liquid Crystals Optics and Photonic Devices. ed. / Ibrahim Abdulhalim; Camilla Parmeggiani. SPIE, 2024. 130160N (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 13016).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - Recently a new mode of liquid crystal LC SW was developed based on the doping of nanoporous microparticles in LCs called NMP-LC mode. However, all the works reported so far used an LC with positive dielectric anisotropy that gave a normally opaque window. Here we report on a normally transparent smart window based on NMP-LC mode using vertical alignment and an LC with negative dielectric anisotropy, doped with cochleate organic particles. The device exhibits a high transparency in the OFF state and a high scattering in the ON state compared with normally opaque NMP-LC. The durability test shows that the SW device switches at least 5184 times without degradation of optical contrast. The scattering mode is caused by the combination of two effects: the NMP effect and the electro-hydrodynamic instability effect. The synergy between these two effects manifests in lower operating voltage and frequency requirements for the device, hence less energy consumption. The electric power that is needed is estimated to be 0.25

AB - Recently a new mode of liquid crystal LC SW was developed based on the doping of nanoporous microparticles in LCs called NMP-LC mode. However, all the works reported so far used an LC with positive dielectric anisotropy that gave a normally opaque window. Here we report on a normally transparent smart window based on NMP-LC mode using vertical alignment and an LC with negative dielectric anisotropy, doped with cochleate organic particles. The device exhibits a high transparency in the OFF state and a high scattering in the ON state compared with normally opaque NMP-LC. The durability test shows that the SW device switches at least 5184 times without degradation of optical contrast. The scattering mode is caused by the combination of two effects: the NMP effect and the electro-hydrodynamic instability effect. The synergy between these two effects manifests in lower operating voltage and frequency requirements for the device, hence less energy consumption. The electric power that is needed is estimated to be 0.25

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Smart window with reduced operating voltage and frequency by combining NMP-LC and EHDI scattering effects

Abstract

Publication series

Conference

Bibliographical note

ASJC Scopus Subject Areas

Keywords

UN SDGs

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