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PCLC flake-based apparatus and method

United States Patent

October 23, 2012
View the Complete Patent at the US Patent & Trademark Office
A PCLC flake/fluid host suspension that enables dual-frequency, reverse drive reorientation and relaxation of the PCLC flakes is composed of a fluid host that is a mixture of: 94 to 99.5 wt % of a non-aqueous fluid medium having a dielectric constant value .di-elect cons., where 1<.di-elect cons.<7, a conductivity value .sigma., where 10.sup.-9>.sigma.>10.sup.-7 Siemens per meter (S/m), and a resistivity r, where 10.sup.7>r>10.sup.10 ohm-meters (.OMEGA.-m), and which is optically transparent in a selected wavelength range .DELTA..lamda.; 0.0025 to 0.25 wt % of an inorganic chloride salt; 0.0475 to 4.75 wt % water; and 0.25 to 2 wt % of an anionic surfactant; and 1 to 5 wt % of PCLC flakes suspended in the fluid host mixture. Various encapsulation forms and methods are disclosed including a Basic test cell, a Microwell, a Microcube, Direct encapsulation (I), Direct encapsulation (II), and Coacervation encapsulation. Applications to display devices are disclosed.
Cox; Gerald P. (Brockport, NY), Fromen; Cathy A. (Raleigh, NC), Marshall; Kenneth L. (Rochester, NY), Jacobs; Stephen D. (Pittsford, NY)
University of Rochester (Rochester, NY)
12/ 840,474
July 21, 2010
FEDERALLY SPONSORED RESEARCH Embodiments of the invention were made with government support under Cooperative Agreement No. DE-FC52-08NH28 sponsored by the U.S. Department of Energy. The government has certain rights in the invention.