MSA  Vol.11 No.2 , February 2020
The Colored Oil Property Effect on Switching Behavior of Electro-Fluidic Display
Abstract: The switchable oil layer driven by electrowetting gives visible color and light valve control, which is the basis of Electro-Fluidic Displays. The colored oil’s property is a key factor that influences the Electro-Fluidic Displays switching behavior. A purple oil was formulated by the oil-soluble purple dye in decane in this study. The dye molecule itself is nonpolar and it doesn’t dissolve in water. The concentration of colored oil influenced the oil/water interfacial tension and oil viscosity. The relationship of EFD switching behavior with oil/water interfacial tension, oil viscosity, and oil conductivity has been systematically investigated. The oil/water interfacial tension decreased with increasing oil concentration, in the meanwhile, the conductivity increased. Oil conductivity was one of the key factors that influenced the Electro-Fluidic Displays optical property. We found for the first time that at the lower oil concentration (2% - 10%), the interfacial tension plays a main role effect on the rupture voltage and response time, but as the conductivity of higher concentration of colored oil increased (at 20%), the rupture voltage-controlled both by conductivity and interfacial tension.
Cite this paper: Guo, Y. , Deng, Y. , Tang, B. , Henzen, A. and Zhou, G. (2020) The Colored Oil Property Effect on Switching Behavior of Electro-Fluidic Display. Materials Sciences and Applications, 11, 167-176. doi: 10.4236/msa.2020.112010.

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