The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 2014
Filed:
Aug. 04, 2010
Lisa Clapp, Cincinnati, OH (US);
Jason Heikenfeld, Cincinnati, OH (US);
April Milarcik, Cincinnati, OH (US);
Russell J. Schwartz, Cincinnati, OH (US);
Stanislav G. Vilner, South Lebanon, OH (US);
Manjeet Dhindsa, Eindhoven, NL;
Stephanie Chevalliot, Cincinnati, OH (US);
Lisa Clapp, Cincinnati, OH (US);
Jason Heikenfeld, Cincinnati, OH (US);
April Milarcik, Cincinnati, OH (US);
Russell J. Schwartz, Cincinnati, OH (US);
Stanislav G. Vilner, South Lebanon, OH (US);
Manjeet Dhindsa, Eindhoven, NL;
Stephanie Chevalliot, Cincinnati, OH (US);
Sun Chemical Corporation, Parsippany, NJ (US);
Abstract
Colored conductive fluids for electrowetting or electrofluidic devices, and the devices themselves, are disclosed. The colored conductive fluid includes a polar solvent and a colorant selected from a pigment and/or a dye. The polar solvent has (a) a dynamic viscosity of 0.1 cP to 1000 cP at 25° C., (b) a surface tension of 25 dynes/cm to 90 dynes/cm at 25° C., and (c) an electrowetting relative response of 20% to 80%. The colored conductive fluid itself can have an electrical conductivity from 0.1 μS/cm to 3,000 μS/cm and can have no greater than 500 total ppm of monatomic ions with ionic radii smaller than 2.0 Å and polyatomic ions with ionic radii smaller than 1.45 Å. The colored conductive fluid should not cause electrical breakdown of a dielectric in the device in which it is employed. An agent for controlling electrical conductivity can optionally be added to the colored conductive fluid.