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:
May. 14, 2019
Filed:
Nov. 06, 2017
Applicant:
E Ink California, Llc, Fremont, CA (US);
Inventors:
Robert A. Sprague, Saratoga, CA (US);
Bo-Ru Yang, Banqiao, TW;
Peter B. Laxton, Marshfield, MA (US);
Assignee:
E INK CALIFORNIA, LLC, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 26/00 (2006.01); G09G 3/34 (2006.01); G02F 1/167 (2019.01); G02F 1/1675 (2019.01);
U.S. Cl.
CPC ...
G02F 1/167 (2013.01); G02F 2001/1678 (2013.01);
Abstract
The present invention is directed to an electrophoretic dispersion comprising charged pigment particles, in particular, an electrophoretic dispersion including both uncharged or lightly charged neutral buoyancy particles and uncharged or lightly charged additive particles. The combination improves the performance of an electrophoretic display, in particular the color state stability over time.