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. 06, 2017
Filed:
Jul. 07, 2014
Applicant:
E Ink California, Llc, Fremont, CA (US);
Assignee:
E INK CALIFORNIA, LLC, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B 1/12 (2006.01); C09C 3/10 (2006.01); G02F 1/167 (2006.01); C09C 1/36 (2006.01); C09C 1/40 (2006.01); C09C 1/56 (2006.01); C09C 1/04 (2006.01); C09C 1/22 (2006.01); C09C 3/12 (2006.01); C09C 1/24 (2006.01); B41J 2/01 (2006.01); G02B 26/00 (2006.01); G02F 1/00 (2006.01);
U.S. Cl.
CPC ...
C09C 3/10 (2013.01); C09C 1/043 (2013.01); C09C 1/22 (2013.01); C09C 1/24 (2013.01); C09C 1/3676 (2013.01); C09C 1/3684 (2013.01); C09C 1/40 (2013.01); C09C 1/407 (2013.01); C09C 1/56 (2013.01); C09C 3/12 (2013.01); G02F 1/167 (2013.01); C01P 2004/50 (2013.01); C01P 2006/40 (2013.01); G02F 2001/1678 (2013.01);
Abstract
The present invention is directed to an electrophoretic dispersion comprising charged pigment particles dispersed in a solvent or solvent mixture, wherein at least one type of the charged pigment particles has an aggregation size about 2 to about 10 times their primary size and/or has a PDI in the range of 0.1 to 0.3. The electrophoretic dispersion of the present invention is capable of improving both image bistability and contrast ratio through adjusting the size distribution of the charged pigment particles.