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Title: PCLC flake-based apparatus and method

Abstract

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.

Inventors:
; ; ;
Issue Date:
Research Org.:
Univ. of Rochester, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1079397
Patent Number(s):
8293135
Application Number:
12/840,474
Assignee:
University of Rochester (Rochester, NY)
Patent Classifications (CPCs):
G - PHYSICS G02 - OPTICS G02F - DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING
C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
DOE Contract Number:  
FC52-08NH28
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Cox, Gerald P, Fromen, Cathy A, Marshall, Kenneth L, and Jacobs, Stephen D. PCLC flake-based apparatus and method. United States: N. p., 2012. Web.
Cox, Gerald P, Fromen, Cathy A, Marshall, Kenneth L, & Jacobs, Stephen D. PCLC flake-based apparatus and method. United States.
Cox, Gerald P, Fromen, Cathy A, Marshall, Kenneth L, and Jacobs, Stephen D. Tue . "PCLC flake-based apparatus and method". United States. https://www.osti.gov/servlets/purl/1079397.
@article{osti_1079397,
title = {PCLC flake-based apparatus and method},
author = {Cox, Gerald P and Fromen, Cathy A and Marshall, Kenneth L and Jacobs, Stephen D},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {10}
}

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Works referenced in this record:

Polymer cholesteric liquid-crystal flake reorientation in an alternating-current electric field
journal, July 2005


Particle Display Technologies Become E-Paper
journal, January 2005


Electric-field-induced motion of polymer cholesteric liquid-crystal flakes in a moderately conductive fluid
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Progress in the development of polymer cholesteric liquid crystal flakes for display applications
journal, December 2004


Motion of doped-polymer-cholesteric liquid crystal flakes in a direct-current electric field
journal, May 2008


Enhanced Electro-Optic Behavior for Shaped Polymer Cholesteric Liquid-Crystal Flakes Made Using Soft Lithography
journal, February 2005