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:
Jun. 09, 2020
Filed:
Dec. 26, 2017
E Ink Corporation, Billerica, MA (US);
Stephen J. Telfer, Arlington, MA (US);
Stephen Bull, Windham, NH (US);
Jennifer M. Morrison, Watertown, MA (US);
Luke M. Slominski, Melrose, MA (US);
David Darrell Miller, Wakefield, MA (US);
Olga Vladimirova Barykina-Tassa, Boston, MA (US);
Christopher L. Hoogeboom, Burlington, MA (US);
Ana L. Lattes, Newton, MA (US);
Lee Yezek, Watertown, MA (US);
Brandon MacDonald, Arlington, MA (US);
Kosta Ladavac, Somerville, MA (US);
Craig A. Herb, Medford, MA (US);
E Ink Corporation, Billerica, MA (US);
Abstract
An electrophoretic medium comprises a fluid, a first, light scattering particle (typically white) and second, third and fourth particles having three subtractive primary colors (typically magenta, cyan and yellow); at least two of these colored particles being non-light scattering. The first and second particles bear polymer coatings such that the electric field required to separate an aggregate formed by the third and the fourth particles is greater than that required to separate an aggregate formed from any other two types of particles. Methods for driving the medium to produce white, black, magenta, cyan, yellow, red, green and blue colors are also described.